diff -r 000000000000 -r dd21522fd290 webengine/osswebengine/WebCore/platform/symbian/Libxml2/Libxml2_xpath.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/webengine/osswebengine/WebCore/platform/symbian/Libxml2/Libxml2_xpath.c Mon Mar 30 12:54:55 2009 +0300 @@ -0,0 +1,12077 @@ +/* + * xpath.c: XML Path Language implementation + * XPath is a language for addressing parts of an XML document, + * designed to be used by both XSLT and XPointer + * + * Reference: W3C Recommendation 16 November 1999 + * http://www.w3.org/TR/1999/REC-xpath-19991116 + * Public reference: + * http://www.w3.org/TR/xpath + * + * See Copyright for the status of this software + * + * Author: daniel@veillard.com + * + */ + +#define IN_LIBXML +#include "XmlEnglibxml.h" + +#include + +// TODO: XE Cleanup +#ifdef HAVE_SYS_TYPES_H +#include +#endif +#ifdef HAVE_MATH_H +#include +#endif +#if defined(HAVE_CTYPE_H) +#include +#endif +#ifdef HAVE_SIGNAL_H +#include +#endif + + +#include "Libxml2_globals.h" +//#include "Libxml2_xmlmemory.h" +//#include "Libxml2_xpath.h" +//#include "Libxml2_tree.h" +//#include "Libxml2_valid.h" +#include "Libxml2_xpathInternals.h" +#include "Libxml2_parserInternals.h" +//#include "Libxml2_hash.h" + +#ifdef LIBXML_XPTR_ENABLED +#include "Libxml2_xpointer.h" +#endif + +#ifdef LIBXML_DEBUG_ENABLED +#include +#endif + +//#include "Libxml2_xmlerror.h" +//#include "Libxml2_threads.h" + +// TODO: remove/rename TODO +#define TODO \ + xmlGenericError(xmlGenericErrorContext, \ + EMBED_ERRTXT("Unimplemented block at %s:%d\n"), \ + __FILE__, __LINE__); + +#if defined(LIBXML_SCHEMAS_ENABLED) || defined(LIBXML_XPATH_ENABLED) +/************************************************************************ + * * + * Floating point stuff * + * * + ************************************************************************/ + +#ifndef TRIO_REPLACE_STDIO +//#define TRIO_PUBLIC static +#endif +#include "Libxml2_trionan.inc" + +/** + * xmlXPathInit: + * + * Initialize the XPath environment + * + * OOM: never (so far -- soon hash tables will be created here) + */ +void +xmlXPathInit(void) { + if (xmlXPathInitialized) return; + + xmlXPathPINF = trio_pinf(); + xmlXPathNINF = trio_ninf(); + xmlXPathNAN = trio_nan(); + xmlXPathNZERO = trio_nzero(); + + xmlXPathInitialized = 1; + + // TODO: Register all XPath functions in reusable hash table here +} + +/** + * xeXPathCleanup: + * + * Free any reusable by XPath module resources + */ +void xeXPathCleanup() +{ +#ifdef XMLENGINE_XPATH_FUNC_HASH_OPTIMIZED + if (xmlXPathDefaultFunctionsHash) + xmlHashFree(xmlXPathDefaultFunctionsHash, NULL); + xmlXPathDefaultFunctionsHash = NULL; + + if (xmlXPathIntermediaryExtensionFunctionsHash) + xmlHashFree(xmlXPathIntermediaryExtensionFunctionsHash, NULL); + xmlXPathIntermediaryExtensionFunctionsHash = NULL; +#endif +} + +// DONE: OPTIMIZE: Define as macro or inliner +/** + * xmlXPathIsNaN: + * @val: a double value + * + * Provides a portable isnan() function to detect whether a double + * is a NotaNumber. Based on trio code + * http://sourceforge.net/projects/ctrio/ + * + * Returns 1 if the value is a NaN, 0 otherwise + */ +/* +inline int xmlXPathIsNaN(double val) { + return(trio_isnan(val)); +}*/ +//#define xmlXPathIsNaN(val) trio_isnan(val) + +//#define xmlXPathIsNaN(val) trio_isnan(val) + +// DONE: OPTIMIZE: Define as macro or inliner +/** + * xmlXPathIsInf: + * @val: a double value + * + * Provides a portable isinf() function to detect whether a double + * is a +Infinite or -Infinite. Based on trio code + * http://sourceforge.net/projects/ctrio/ + * + * Returns 1 vi the value is +Infinite, -1 if -Infinite, 0 otherwise + */ +/* +inline int xmlXPathIsInf(double val) { + return(trio_isinf(val)); +} +*/ +#define xmlXPathIsInf(val) trio_isinf(val) + +#endif /* SCHEMAS or XPATH */ + + +#ifdef LIBXML_XPATH_ENABLED + + +// TODO: OPTIMIZE: Define as macro or inliner +/** + * xmlXPathGetSign: + * @val: a double value + * + * Provides a portable function to detect the sign of a double + * Modified from trio code + * http://sourceforge.net/projects/ctrio/ + * + * Returns 1 if the value is Negative, 0 if positive + */ +/* +inline int xmlXPathGetSign(double val) { + return(trio_signbit(val)); +} +*/ +#define xmlXPathGetSign(val) trio_signbit(val) + + +/* + * TODO: when compatibility allows remove all "fake node libxslt" strings + * the test should just be name[0] = ' ' + */ +/* #define DEBUG */ +/* #define DEBUG_STEP */ +/* #define DEBUG_STEP_NTH */ +/* #define DEBUG_EXPR */ +/* #define DEBUG_EVAL_COUNTS */ + + + +static const xmlNs xmlXPathXMLNamespaceStruct = { + NULL, + XML_NAMESPACE_DECL, + XML_XML_NAMESPACE, + BAD_CAST "xml", + NULL +}; +static const xmlNsPtr xmlXPathXMLNamespace = (xmlNsPtr)&xmlXPathXMLNamespaceStruct; + +/************************************************************************ + * * + * Error handling routines * + * * + ************************************************************************/ + +/* + * The array xmlXPathErrorMessages corresponds to the enum xmlXPathError + */ +const char *const xmlXPathErrorMessages[] = { + EMBED_ERRTXT("Ok\n"), + EMBED_ERRTXT("Number encoding\n"), + EMBED_ERRTXT("Unfinished literal\n"), + EMBED_ERRTXT("Start of literal\n"), + EMBED_ERRTXT("Expected $ for variable reference\n"), + EMBED_ERRTXT("Undefined variable\n"), + EMBED_ERRTXT("Invalid predicate\n"), + EMBED_ERRTXT("Invalid expression\n"), + EMBED_ERRTXT("Missing closing curly brace\n"), + EMBED_ERRTXT("Unregistered function\n"), + EMBED_ERRTXT("Invalid operand\n"), + EMBED_ERRTXT("Invalid type\n"), + EMBED_ERRTXT("Invalid number of arguments\n"), + EMBED_ERRTXT("Invalid context size\n"), + EMBED_ERRTXT("Invalid context position\n"), + EMBED_ERRTXT("Memory allocation error\n"), + EMBED_ERRTXT("Syntax error\n"), + EMBED_ERRTXT("Resource error\n"), + EMBED_ERRTXT("Sub resource error\n"), + EMBED_ERRTXT("Undefined namespace prefix\n"), + EMBED_ERRTXT("Encoding error\n"), + EMBED_ERRTXT("Char out of XML range\n") +}; + + +// TODO: OPTIMIZATION: Not required for Symbian +/** + * xmlXPathErrMemory: + * @ctxt: an XPath context + * @extra: extra informations + * + * Handle a redefinition of attribute error + */ +static void +xmlXPathErrMemory(xmlXPathContextPtr ctxt, const char *extra) +{ + if (ctxt != NULL) { + if (extra) { + xmlChar buf[200]; + + xmlStrPrintf(buf, 200, + BAD_CAST EMBED_ERRTXT("Memory allocation failed : %s\n"), extra); + ctxt->lastError.message = (char *) xmlStrdup(buf); + } else { + ctxt->lastError.message = (char *) + xmlStrdup(BAD_CAST EMBED_ERRTXT("Memory allocation failed\n")); + } + ctxt->lastError.domain = XML_FROM_XPATH; + ctxt->lastError.code = XML_ERR_NO_MEMORY; + if (ctxt->error != NULL) + ctxt->error(ctxt->userData, &ctxt->lastError); + } else { + if (extra) + __xmlRaiseError(NULL, NULL, NULL, + NULL, NULL, XML_FROM_XPATH, + XML_ERR_NO_MEMORY, XML_ERR_FATAL, NULL, 0, + extra, NULL, NULL, 0, 0, + EMBED_ERRTXT("Memory allocation failed : %s\n"), extra); + else + __xmlRaiseError(NULL, NULL, NULL, + NULL, NULL, XML_FROM_XPATH, + XML_ERR_NO_MEMORY, XML_ERR_FATAL, NULL, 0, + NULL, NULL, NULL, 0, 0, + EMBED_ERRTXT("Memory allocation failed\n")); + } +} + +/** + * xmlXPathErrMemory: + * @ctxt: an XPath parser context + * @extra: extra informations + * + * Handle a redefinition of attribute error + */ +// TODO: Obviously, something wrong here: ctxt!=NULL for sure +static void +xmlXPathPErrMemory(xmlXPathParserContextPtr ctxt, const char *extra) +{ + ctxt->error = XPATH_MEMORY_ERROR; + if (ctxt == NULL) + xmlXPathErrMemory(NULL, extra); + else + xmlXPathErrMemory(ctxt->context, extra); +} + +/** + * xmlXPathErr: + * @ctxt: a XPath parser context + * @error: the error code + * + * Handle a Relax NG Parsing error + */ +void +xmlXPathErr(xmlXPathParserContextPtr ctxt, int error) +{ + // TODO: OPTIMIZE: Combine two (or even all three) IF blocks into one + if (ctxt == NULL) { + __xmlRaiseError(NULL, NULL, NULL, + NULL, NULL, XML_FROM_XPATH, + error + XML_XPATH_EXPRESSION_OK - XPATH_EXPRESSION_OK, + XML_ERR_ERROR, NULL, 0, + NULL, NULL, NULL, 0, 0, + xmlXPathErrorMessages[error]); + return; + } + ctxt->error = error; + if (ctxt->context == NULL) { + __xmlRaiseError(NULL, NULL, NULL, + NULL, NULL, XML_FROM_XPATH, + error + XML_XPATH_EXPRESSION_OK - XPATH_EXPRESSION_OK, + XML_ERR_ERROR, NULL, 0, + (const char *) ctxt->base, NULL, NULL, + ctxt->cur - ctxt->base, 0, + xmlXPathErrorMessages[error]); + return; + } + // TODO: OPTIMIZE: make a proxy for lastError + ctxt->context->lastError.domain = XML_FROM_XPATH; + ctxt->context->lastError.code = error + XML_XPATH_EXPRESSION_OK - XPATH_EXPRESSION_OK; + ctxt->context->lastError.level = XML_ERR_ERROR; + if (ctxt->context->lastError.str1) // agathe added + xmlFree(ctxt->context->lastError.str1); + ctxt->context->lastError.str1 = (char *) xmlStrdup(ctxt->base); + ctxt->context->lastError.int1 = ctxt->cur - ctxt->base; + ctxt->context->lastError.node = ctxt->context->debugNode; + + if (ctxt->context->error != NULL) { + ctxt->context->error(ctxt->context->userData, &ctxt->context->lastError); + } else { + __xmlRaiseError(NULL, NULL, NULL, + NULL, ctxt->context->debugNode, XML_FROM_XPATH, + error + XML_XPATH_EXPRESSION_OK - XPATH_EXPRESSION_OK, + XML_ERR_ERROR, NULL, 0, + (const char *) ctxt->base, NULL, NULL, + ctxt->cur - ctxt->base, 0, + xmlXPathErrorMessages[error]); + } +} + +// DONE: OPTIMIZE: Use macro instead of function call +// Macro added in xpathInternals.h +/** + * xmlXPatherror: + * @ctxt: the XPath Parser context + * @file: the file name + * @line: the line number + * @no: the error number + * + * Formats an error message. + */ +//void +//xmlXPatherror(xmlXPathParserContextPtr ctxt, const char* file ATTRIBUTE_UNUSED, +// int line ATTRIBUTE_UNUSED , int no) +//{ +// xmlXPathErr(ctxt, no); +//} + + +/************************************************************************ + * * + * Parser Types * + * * + ************************************************************************/ + +/* + * Types are private: + */ +typedef enum { + AXIS_ANCESTOR = 1, + AXIS_ANCESTOR_OR_SELF, + AXIS_ATTRIBUTE, + AXIS_CHILD, + AXIS_DESCENDANT, + AXIS_DESCENDANT_OR_SELF, + AXIS_FOLLOWING, + AXIS_FOLLOWING_SIBLING, + AXIS_NAMESPACE, + AXIS_PARENT, + AXIS_PRECEDING, + AXIS_PRECEDING_SIBLING, + AXIS_SELF +} xmlXPathAxisVal; + +typedef enum { + NODE_TEST_NONE = 0, + NODE_TEST_TYPE = 1, + NODE_TEST_PI = 2, + NODE_TEST_ALL = 3, + NODE_TEST_NS = 4, + NODE_TEST_NAME = 5 +} xmlXPathTestVal; + +typedef enum { + NODE_TYPE_NODE = 0, + NODE_TYPE_COMMENT = XML_COMMENT_NODE, + NODE_TYPE_TEXT = XML_TEXT_NODE, + NODE_TYPE_PI = XML_PI_NODE +} xmlXPathTypeVal; + + + + +/************************************************************************ + * * + * Parser Type functions * + * * + ************************************************************************/ + +/** + * xmlXPathNewCompExpr: + * + * Create a new Xpath component + * + * Returns the newly allocated xmlXPathCompExprPtr or NULL in case of error + */ +static xmlXPathCompExprPtr +xmlXPathNewCompExpr(void) { + xmlXPathCompExprPtr cur; + + cur = (xmlXPathCompExprPtr) xmlMalloc(sizeof(xmlXPathCompExpr)); + if (cur == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("allocating component\n")); + return(NULL); + } + memset(cur, 0, sizeof(xmlXPathCompExpr)); + cur->maxStep = 10; /* TODO: XPath context can be configured by maxStep parameter */ + cur->nbStep = 0; + cur->steps = (xmlXPathStepOp *) xmlMalloc(cur->maxStep * sizeof(xmlXPathStepOp)); + if (cur->steps == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("allocating steps\n")); + xmlFree(cur); + return(NULL); + } + memset(cur->steps, 0, cur->maxStep * sizeof(xmlXPathStepOp)); + cur->last = -1; +#ifdef DEBUG_EVAL_COUNTS + cur->nb = 0; +#endif + return(cur); +} + +/** + * xmlXPathFreeCompExpr: + * @comp: an XPATH comp + * + * Free up the memory allocated by @comp + */ +void +xmlXPathFreeCompExpr(xmlXPathCompExprPtr comp) +{ + xmlXPathStepOpPtr op; + int i; + + if (comp == NULL) + return; + if (comp->dict == NULL) { + for (i = 0; i < comp->nbStep; i++) { + op = &comp->steps[i]; + if (op->value4 != NULL) { + if (op->op == XPATH_OP_VALUE) + xmlXPathFreeObject((xmlXPathObjectPtr)op->value4); + else + xmlFree(op->value4); + } + if (op->value5 != NULL) + xmlFree(op->value5); + } + } else { + for (i = 0; i < comp->nbStep; i++) { + op = &comp->steps[i]; + if (op->value4 != NULL) { + if (op->op == XPATH_OP_VALUE) + xmlXPathFreeObject((xmlXPathObjectPtr)op->value4); + } + } + xmlDictFree(comp->dict); + } + + if (comp->steps != NULL) { + xmlFree(comp->steps); + } +#ifdef DEBUG_EVAL_COUNTS + if (comp->string != NULL) { + xmlFree(comp->string); + } +#endif + if (comp->expr != NULL) { + xmlFree(comp->expr); + } + + xmlFree(comp); +} + +/** + * xmlXPathCompExprAdd: + * @comp: the compiled expression + * @ch1: first child index + * @ch2: second child index + * @op: an op + * @value: the first int value + * @value2: the second int value + * @value3: the third int value + * @value4: the first string value + * @value5: the second string value + * + * Add a step to an XPath Compiled Expression + * + * Returns -1 in case of failure, the index otherwise + */ +static int +xmlXPathCompExprAdd(xmlXPathCompExprPtr comp, int ch1, int ch2, + xmlXPathOp op, int value, + int value2, int value3, void *value4, void *value5) +{ + xmlXPathStepOpPtr step; + + if (comp->nbStep >= comp->maxStep) + { + xmlXPathStepOp *real; + + comp->maxStep *= 2; + real = (xmlXPathStepOp *) xmlRealloc(comp->steps, comp->maxStep * sizeof(xmlXPathStepOp)); + if (real == NULL) { + comp->maxStep /= 2; + xmlXPathErrMemory(NULL, EMBED_ERRTXT("adding step\n")); + return(-1); + } + comp->steps = real; + } + // DONE: OPTIMIZE: make a proxy for comp->steps[comp->nbStep] + step = &(comp->steps[comp->nbStep]); + // + comp->last = comp->nbStep; + step->ch1 = ch1; + step->ch2 = ch2; + step->op = op; + step->value = value; + step->value2 = value2; + step->value3 = value3; + + if ((comp->dict != NULL) && + ((op == XPATH_OP_FUNCTION) || (op == XPATH_OP_VARIABLE) || + (op == XPATH_OP_COLLECT))) + { + if (value4 != NULL) { + step->value4 = (xmlChar*) + (void*)xmlDictLookup(comp->dict, (xmlChar*) value4, -1); + xmlFree(value4); + } else + step->value4 = NULL; + + if (value5 != NULL) { + step->value5 = (xmlChar*) + (void*)xmlDictLookup(comp->dict, (xmlChar*)value5, -1); + xmlFree(value5); + }else + step->value5 = NULL; + } + else + { + step->value4 = value4; + step->value5 = value5; + } + step->cache = NULL; + return(comp->nbStep++); +} + +/** + * xmlXPathCompSwap: + * @comp: the compiled expression + * @op: operation index + * + * Swaps 2 operations in the compiled expression + */ +static void +xmlXPathCompSwap(xmlXPathStepOpPtr op) { + int tmp; + +#ifndef LIBXML_THREAD_ENABLED + /* + * Since this manipulates possibly shared variables, this is + * disabled if one detects that the library is used in a multithreaded + * application + */ + if (xmlXPathDisableOptimizer) + return; +#endif + + tmp = op->ch1; + op->ch1 = op->ch2; + op->ch2 = tmp; +} + + +#define PUSH_FULL_EXPR(op, op1, op2, val, val2, val3, val4, val5) \ + xmlXPathCompExprAdd(ctxt->comp, (op1), (op2), (op), (val), (val2), (val3), (val4), (val5)) + +#define PUSH_LONG_EXPR(op, val, val2, val3, val4, val5) \ + xmlXPathCompExprAdd(ctxt->comp, ctxt->comp->last, -1, (op), (val), (val2), (val3), (val4), (val5)) + +#define PUSH_LEAVE_EXPR(op, val, val2) \ + xmlXPathCompExprAdd(ctxt->comp, -1, -1, (op), (val), (val2), 0 ,NULL ,NULL) + +#define PUSH_UNARY_EXPR(op, ch, val, val2) \ + xmlXPathCompExprAdd(ctxt->comp, (ch), -1, (op), (val), (val2), 0 ,NULL ,NULL) + +#define PUSH_BINARY_EXPR(op, ch1, ch2, val, val2) \ + xmlXPathCompExprAdd(ctxt->comp, (ch1), (ch2), (op), (val), (val2), 0 ,NULL ,NULL) + +/************************************************************************ + * * + * Debugging related functions * + * * + ************************************************************************/ + +// TODO: OPTIMIZE: Create a function and do function call in macro +#define STRANGE \ + xmlGenericError(xmlGenericErrorContext, \ + EMBED_ERRTXT("Internal error at %s:%d\n"), \ + __FILE__, __LINE__); + +#ifdef LIBXML_DEBUG_ENABLED +static void +xmlXPathDebugDumpNode(FILE *output, xmlNodePtr cur, int depth) { + int i; + char shift[100]; + + for (i = 0;((i < depth) && (i < 25));i++) + shift[2 * i] = shift[2 * i + 1] = ' '; + shift[2 * i] = shift[2 * i + 1] = 0; + if (cur == NULL) { + fprintf(output, shift); + fprintf(output, "Node is NULL !\n"); + return; + + } + + if ((cur->type == XML_DOCUMENT_NODE) || + (cur->type == XML_HTML_DOCUMENT_NODE)) { + fprintf(output, shift); + fprintf(output, " /\n"); + } else if (cur->type == XML_ATTRIBUTE_NODE) + xmlDebugDumpAttr(output, (xmlAttrPtr)cur, depth); + else + xmlDebugDumpOneNode(output, cur, depth); +} + +static void +xmlXPathDebugDumpNodeList(FILE *output, xmlNodePtr cur, int depth) { + xmlNodePtr tmp; + int i; + char shift[100]; + + for (i = 0;((i < depth) && (i < 25));i++) + shift[2 * i] = shift[2 * i + 1] = ' '; + shift[2 * i] = shift[2 * i + 1] = 0; + if (cur == NULL) { + fprintf(output, shift); + fprintf(output, "Node is NULL !\n"); + return; + } + + while (cur != NULL) { + tmp = cur; + cur = cur->next; + xmlDebugDumpOneNode(output, tmp, depth); + } +} + +static void +xmlXPathDebugDumpNodeSet(FILE *output, xmlNodeSetPtr cur, int depth) { + int i; + char shift[100]; + + for (i = 0;((i < depth) && (i < 25));i++) + shift[2 * i] = shift[2 * i + 1] = ' '; + + shift[2 * i] = shift[2 * i + 1] = 0; + + if (cur == NULL) { + fprintf(output, shift); + fprintf(output, "NodeSet is NULL !\n"); + return; + } + + if (cur != NULL) { + fprintf(output, "Set contains %d nodes:\n", cur->nodeNr); + for (i = 0;i < cur->nodeNr;i++) { + fprintf(output, shift); + fprintf(output, "%d", i + 1); + xmlXPathDebugDumpNode(output, cur->nodeTab[i], depth + 1); + } + } +} + +static void +xmlXPathDebugDumpValueTree(FILE *output, xmlNodeSetPtr cur, int depth) { + int i; + char shift[100]; + + for (i = 0;((i < depth) && (i < 25));i++) + shift[2 * i] = shift[2 * i + 1] = ' '; + shift[2 * i] = shift[2 * i + 1] = 0; + + if ((cur == NULL) || (cur->nodeNr == 0) || (cur->nodeTab[0] == NULL)) { + fprintf(output, shift); + fprintf(output, "Value Tree is NULL !\n"); + return; + + } + + fprintf(output, shift); + fprintf(output, "%d", i + 1); + xmlXPathDebugDumpNodeList(output, cur->nodeTab[0]->children, depth + 1); +} +#if defined(LIBXML_XPTR_ENABLED) +static void +xmlXPathDebugDumpLocationSet(FILE *output, xmlLocationSetPtr cur, int depth) { + int i; + char shift[100]; + + for (i = 0;((i < depth) && (i < 25));i++) + shift[2 * i] = shift[2 * i + 1] = ' '; + shift[2 * i] = shift[2 * i + 1] = 0; + + if (cur == NULL) { + fprintf(output, shift); + fprintf(output, "LocationSet is NULL !\n"); + return; + + } + + for (i = 0;i < cur->locNr;i++) { + fprintf(output, shift); + fprintf(output, "%d : ", i + 1); + xmlXPathDebugDumpObject(output, cur->locTab[i], depth + 1); + } +} +#endif /* LIBXML_XPTR_ENABLED */ + +/** + * xmlXPathDebugDumpObject: + * @output: the FILE * to dump the output + * @cur: the object to inspect + * @depth: indentation level + * + * Dump the content of the object for debugging purposes + */ +void +xmlXPathDebugDumpObject(FILE *output, xmlXPathObjectPtr cur, int depth) { + int i; + char shift[100]; + + for (i = 0;((i < depth) && (i < 25));i++) + shift[2 * i] = shift[2 * i + 1] = ' '; + shift[2 * i] = shift[2 * i + 1] = 0; + + fprintf(output, shift); + + if (cur == NULL) { + fprintf(output, "Object is empty (NULL)\n"); + return; + } + switch(cur->type) { + case XPATH_UNDEFINED: + fprintf(output, "Object is uninitialized\n"); + break; + case XPATH_NODESET: + fprintf(output, "Object is a Node Set :\n"); + xmlXPathDebugDumpNodeSet(output, cur->nodesetval, depth); + break; + case XPATH_XSLT_TREE: + fprintf(output, "Object is an XSLT value tree :\n"); + xmlXPathDebugDumpValueTree(output, cur->nodesetval, depth); + break; + case XPATH_BOOLEAN: + fprintf(output, "Object is a Boolean : "); + if (cur->boolval) fprintf(output, "true\n"); + else fprintf(output, "false\n"); + break; + case XPATH_NUMBER: + switch (xmlXPathIsInf(cur->floatval)) { + case 1: + fprintf(output, "Object is a number : Infinity\n"); + break; + case -1: + fprintf(output, "Object is a number : -Infinity\n"); + break; + default: + if (xmlXPathIsNaN(cur->floatval)) { + fprintf(output, "Object is a number : NaN\n"); + } else if (cur->floatval == 0 && xmlXPathGetSign(cur->floatval) != 0) { + fprintf(output, "Object is a number : 0\n"); + } else { + fprintf(output, "Object is a number : %0g\n", cur->floatval); + } + } + break; + case XPATH_STRING: + fprintf(output, "Object is a string : "); + xmlDebugDumpString(output, cur->stringval); + fprintf(output, "\n"); + break; + case XPATH_POINT: + fprintf(output, "Object is a point : index %d in node", cur->index); + xmlXPathDebugDumpNode(output, (xmlNodePtr) cur->user, depth + 1); + fprintf(output, "\n"); + break; + case XPATH_RANGE: + if ((cur->user2 == NULL) || + ((cur->user2 == cur->user) && (cur->index == cur->index2))) { + fprintf(output, "Object is a collapsed range :\n"); + fprintf(output, shift); + if (cur->index >= 0) + fprintf(output, "index %d in ", cur->index); + fprintf(output, "node\n"); + xmlXPathDebugDumpNode(output, (xmlNodePtr) cur->user, + depth + 1); + } else { + fprintf(output, "Object is a range :\n"); + fprintf(output, shift); + fprintf(output, "From "); + if (cur->index >= 0) + fprintf(output, "index %d in ", cur->index); + fprintf(output, "node\n"); + xmlXPathDebugDumpNode(output, (xmlNodePtr) cur->user, + depth + 1); + fprintf(output, shift); + fprintf(output, "To "); + if (cur->index2 >= 0) + fprintf(output, "index %d in ", cur->index2); + fprintf(output, "node\n"); + xmlXPathDebugDumpNode(output, (xmlNodePtr) cur->user2, + depth + 1); + fprintf(output, "\n"); + } + break; + case XPATH_LOCATIONSET: +#if defined(LIBXML_XPTR_ENABLED) + fprintf(output, "Object is a Location Set:\n"); + xmlXPathDebugDumpLocationSet(output, + (xmlLocationSetPtr) cur->user, depth); +#endif + break; + case XPATH_USERS: + fprintf(output, "Object is user defined\n"); + break; + } +} + +static void +xmlXPathDebugDumpStepOp(FILE *output, xmlXPathCompExprPtr comp, + xmlXPathStepOpPtr op, int depth) { + int i; + char shift[100]; + + for (i = 0;((i < depth) && (i < 25));i++) + shift[2 * i] = shift[2 * i + 1] = ' '; + shift[2 * i] = shift[2 * i + 1] = 0; + + fprintf(output, shift); + if (op == NULL) { + fprintf(output, "Step is NULL\n"); + return; + } + switch (op->op) { + case XPATH_OP_END: + fprintf(output, "END"); break; + case XPATH_OP_AND: + fprintf(output, "AND"); break; + case XPATH_OP_OR: + fprintf(output, "OR"); break; + case XPATH_OP_EQUAL: + if (op->value) + fprintf(output, "EQUAL ="); + else + fprintf(output, "EQUAL !="); + break; + case XPATH_OP_CMP: + if (op->value) + fprintf(output, "CMP <"); + else + fprintf(output, "CMP >"); + if (!op->value2) + fprintf(output, "="); + break; + case XPATH_OP_PLUS: + if (op->value == 0) + fprintf(output, "PLUS -"); + else if (op->value == 1) + fprintf(output, "PLUS +"); + else if (op->value == 2) + fprintf(output, "PLUS unary -"); + else if (op->value == 3) + fprintf(output, "PLUS unary - -"); + break; + case XPATH_OP_MULT: + if (op->value == 0) + fprintf(output, "MULT *"); + else if (op->value == 1) + fprintf(output, "MULT div"); + else + fprintf(output, "MULT mod"); + break; + case XPATH_OP_UNION: + fprintf(output, "UNION"); break; + case XPATH_OP_ROOT: + fprintf(output, "ROOT"); break; + case XPATH_OP_NODE: + fprintf(output, "NODE"); break; + case XPATH_OP_RESET: + fprintf(output, "RESET"); break; + case XPATH_OP_SORT: + fprintf(output, "SORT"); break; + case XPATH_OP_COLLECT: { + xmlXPathAxisVal axis = (xmlXPathAxisVal)op->value; + xmlXPathTestVal test = (xmlXPathTestVal)op->value2; + xmlXPathTypeVal type = (xmlXPathTypeVal)op->value3; + const xmlChar *prefix = op->value4; + const xmlChar *name = op->value5; + + fprintf(output, "COLLECT "); + switch (axis) { + case AXIS_ANCESTOR: + fprintf(output, " 'ancestors' "); break; + case AXIS_ANCESTOR_OR_SELF: + fprintf(output, " 'ancestors-or-self' "); break; + case AXIS_ATTRIBUTE: + fprintf(output, " 'attributes' "); break; + case AXIS_CHILD: + fprintf(output, " 'child' "); break; + case AXIS_DESCENDANT: + fprintf(output, " 'descendant' "); break; + case AXIS_DESCENDANT_OR_SELF: + fprintf(output, " 'descendant-or-self' "); break; + case AXIS_FOLLOWING: + fprintf(output, " 'following' "); break; + case AXIS_FOLLOWING_SIBLING: + fprintf(output, " 'following-siblings' "); break; + case AXIS_NAMESPACE: + fprintf(output, " 'namespace' "); break; + case AXIS_PARENT: + fprintf(output, " 'parent' "); break; + case AXIS_PRECEDING: + fprintf(output, " 'preceding' "); break; + case AXIS_PRECEDING_SIBLING: + fprintf(output, " 'preceding-sibling' "); break; + case AXIS_SELF: + fprintf(output, " 'self' "); break; + } + switch (test) { + case NODE_TEST_NONE: + fprintf(output, "'none' "); break; + case NODE_TEST_TYPE: + fprintf(output, "'type' "); break; + case NODE_TEST_PI: + fprintf(output, "'PI' "); break; + case NODE_TEST_ALL: + fprintf(output, "'all' "); break; + case NODE_TEST_NS: + fprintf(output, "'namespace' "); break; + case NODE_TEST_NAME: + fprintf(output, "'name' "); break; + } + switch (type) { + case NODE_TYPE_NODE: + fprintf(output, "'node' "); break; + case NODE_TYPE_COMMENT: + fprintf(output, "'comment' "); break; + case NODE_TYPE_TEXT: + fprintf(output, "'text' "); break; + case NODE_TYPE_PI: + fprintf(output, "'PI' "); break; + } + if (prefix != NULL) + fprintf(output, "%s:", prefix); + if (name != NULL) + fprintf(output, "%s", (const char *) name); + break; + + } + case XPATH_OP_VALUE: { + xmlXPathObjectPtr object = (xmlXPathObjectPtr) op->value4; + + fprintf(output, "ELEM "); + xmlXPathDebugDumpObject(output, object, 0); + goto finish; + } + case XPATH_OP_VARIABLE: { + const xmlChar *prefix = op->value5; + const xmlChar *name = op->value4; + + if (prefix != NULL) + fprintf(output, "VARIABLE %s:%s", prefix, name); + else + fprintf(output, "VARIABLE %s", name); + break; + } + case XPATH_OP_FUNCTION: { + int nbargs = op->value; + const xmlChar *prefix = op->value5; + const xmlChar *name = op->value4; + + if (prefix != NULL) + fprintf(output, "FUNCTION %s:%s(%d args)", + prefix, name, nbargs); + else + fprintf(output, "FUNCTION %s(%d args)", name, nbargs); + break; + } + case XPATH_OP_ARG: fprintf(output, "ARG"); break; + case XPATH_OP_PREDICATE: fprintf(output, "PREDICATE"); break; + case XPATH_OP_FILTER: fprintf(output, "FILTER"); break; +#ifdef LIBXML_XPTR_ENABLED + case XPATH_OP_RANGETO: fprintf(output, "RANGETO"); break; +#endif + default: + fprintf(output, "UNKNOWN %d\n", op->op); return; + } + fprintf(output, "\n"); +finish: + if (op->ch1 >= 0) + xmlXPathDebugDumpStepOp(output, comp, &comp->steps[op->ch1], depth + 1); + if (op->ch2 >= 0) + xmlXPathDebugDumpStepOp(output, comp, &comp->steps[op->ch2], depth + 1); +} + +/** + * xmlXPathDebugDumpCompExpr: + * @output: the FILE * for the output + * @comp: the precompiled XPath expression + * @depth: the indentation level. + * + * Dumps the tree of the compiled XPath expression. + */ +void +xmlXPathDebugDumpCompExpr(FILE *output, xmlXPathCompExprPtr comp, + int depth) { + int i; + char shift[100]; + + for (i = 0;((i < depth) && (i < 25));i++) + shift[2 * i] = shift[2 * i + 1] = ' '; + shift[2 * i] = shift[2 * i + 1] = 0; + + fprintf(output, shift); + + if (comp == NULL) { + fprintf(output, "Compiled Expression is NULL\n"); + return; + } + fprintf(output, "Compiled Expression : %d elements\n", + comp->nbStep); + i = comp->last; + xmlXPathDebugDumpStepOp(output, comp, &comp->steps[i], depth + 1); +} +#endif /* LIBXML_DEBUG_ENABLED */ + +/************************************************************************ + * * + * Parser stacks related functions and macros * + * * + ************************************************************************/ + +/** + * valuePop: + * @ctxt: an XPath evaluation context + * + * Pops the top XPath object from the value stack + * + * Returns the XPath object just removed + */ +extern xmlXPathObjectPtr +valuePop(xmlXPathParserContextPtr ctxt) +{ + xmlXPathObjectPtr ret; + + if (ctxt->valueNr <= 0) + return (0); + ctxt->valueNr--; + if (ctxt->valueNr > 0) + ctxt->value = ctxt->valueTab[ctxt->valueNr - 1]; + else + ctxt->value = NULL; + ret = ctxt->valueTab[ctxt->valueNr]; + ctxt->valueTab[ctxt->valueNr] = 0; + return (ret); +} +/** + * valuePush: + * @ctxt: an XPath evaluation context + * @value: the XPath object + * + * Pushes a new XPath object on top of the value stack + * + * returns the number of items on the value stack + * + * OOM: possible --> returns 0 + */ +int +valuePush(xmlXPathParserContextPtr ctxt, xmlXPathObjectPtr value) +{ + if (ctxt->valueNr >= ctxt->valueMax) + { + xmlXPathObjectPtr* tmp; + // DONE: Fix xmlRealloc + tmp = (xmlXPathObjectPtr*)xmlRealloc(ctxt->valueTab, + ctxt->valueMax * + 2 * sizeof(ctxt->valueTab[0])); + if (!tmp) { + xmlGenericError(xmlGenericErrorContext, EMBED_ERRTXT("realloc failed !\n")); + return (0); + } + ctxt->valueTab = tmp; + ctxt->valueMax *= 2; + } + ctxt->valueTab[ctxt->valueNr] = value; + ctxt->value = value; + return (ctxt->valueNr++); +} + +/** + * xmlXPathPopBoolean: + * @ctxt: an XPath parser context + * + * Pops a boolean from the stack, handling conversion if needed. + * Check error with #xmlXPathCheckError. + * + * Returns the boolean + */ +int +xmlXPathPopBoolean (xmlXPathParserContextPtr ctxt) { + xmlXPathObjectPtr obj; + int ret; + + obj = valuePop(ctxt); + if (obj == NULL) { + xmlXPathSetError(ctxt, XPATH_INVALID_OPERAND); + return(0); + } + if (obj->type != XPATH_BOOLEAN) + ret = xmlXPathCastToBoolean(obj); + else + ret = obj->boolval; + xmlXPathFreeObject(obj); + return(ret); +} + +/** + * xmlXPathPopNumber: + * @ctxt: an XPath parser context + * + * Pops a number from the stack, handling conversion if needed. + * Check error with #xmlXPathCheckError. + * + * Returns the number + */ +double +xmlXPathPopNumber (xmlXPathParserContextPtr ctxt) { + xmlXPathObjectPtr obj; + double ret; + + obj = valuePop(ctxt); + if (obj == NULL) { + xmlXPathSetError(ctxt, XPATH_INVALID_OPERAND); + return(0); + } + if (obj->type != XPATH_NUMBER) + ret = xmlXPathCastToNumber(obj); + else + ret = obj->floatval; + xmlXPathFreeObject(obj); + return(ret); +} + +/** + * xmlXPathPopString: + * @ctxt: an XPath parser context + * + * Pops a string from the stack, handling conversion if needed. + * Check error with #xmlXPathCheckError. + * + * Returns the string + */ +xmlChar * +xmlXPathPopString (xmlXPathParserContextPtr ctxt) { + xmlXPathObjectPtr obj; + xmlChar * ret; + + obj = valuePop(ctxt); + if (obj == NULL) { + xmlXPathSetError(ctxt, XPATH_INVALID_OPERAND); + return(NULL); + } + ret = xmlXPathCastToString(obj); /* this does required strdup */ + /* TODO: needs refactoring somewhere else */ + if (obj->stringval == ret) + obj->stringval = NULL; + xmlXPathFreeObject(obj); + return(ret); +} + +/** + * xmlXPathPopNodeSet: + * @ctxt: an XPath parser context + * + * Pops a node-set from the stack, handling conversion if needed. + * Check error with #xmlXPathCheckError. + * + * Returns the node-set + */ +xmlNodeSetPtr +xmlXPathPopNodeSet (xmlXPathParserContextPtr ctxt) { + xmlXPathObjectPtr obj; + xmlNodeSetPtr ret; + + if (ctxt->value == NULL) { + xmlXPathSetError(ctxt, XPATH_INVALID_OPERAND); + return(NULL); + } + if (!xmlXPathStackIsNodeSet(ctxt)) { + xmlXPathSetTypeError(ctxt); + return(NULL); + } + obj = valuePop(ctxt); + ret = obj->nodesetval; + /* to fix memory leak of not clearing obj->user */ + if (obj->boolval && obj->user != NULL) + xmlFreeNodeList((xmlNodePtr) obj->user); + xmlXPathFreeNodeSetList(obj); + return(ret); +} + +/** + * xmlXPathPopExternal: + * @ctxt: an XPath parser context + * + * Pops an external object from the stack, handling conversion if needed. + * Check error with #xmlXPathCheckError. + * + * Returns the object + */ +void * +xmlXPathPopExternal (xmlXPathParserContextPtr ctxt) { + xmlXPathObjectPtr obj; + void * ret; + + if (ctxt->value == NULL) { + xmlXPathSetError(ctxt, XPATH_INVALID_OPERAND); + return(NULL); + } + if (ctxt->value->type != XPATH_USERS) { + xmlXPathSetTypeError(ctxt); + return(NULL); + } + obj = valuePop(ctxt); + ret = obj->user; + xmlXPathFreeObject(obj); + return(ret); +} + +/* + * Macros for accessing the content. Those should be used only by the parser, + * and not exported. + * + * Dirty macros, i.e. one need to make assumption on the context to use them + * + * CUR_PTR return the current pointer to the xmlChar to be parsed. + * CUR returns the current xmlChar value, i.e. a 8 bit value + * in ISO-Latin or UTF-8. + * This should be used internally by the parser + * only to compare to ASCII values otherwise it would break when + * running with UTF-8 encoding. + * NXT(n) returns the n'th next xmlChar. Same as CUR is should be used only + * to compare on ASCII based substring. + * SKIP(n) Skip n xmlChar, and must also be used only to skip ASCII defined + * strings within the parser. + * CURRENT Returns the current char value, with the full decoding of + * UTF-8 if we are using this mode. It returns an int. + * NEXT Skip to the next character, this does the proper decoding + * in UTF-8 mode. It also pop-up unfinished entities on the fly. + * It returns the pointer to the current xmlChar. + */ + +#define CUR (*ctxt->cur) +#define SKIP(val) ctxt->cur += (val) +#define NXT(val) ctxt->cur[(val)] +#define CUR_PTR ctxt->cur +#define CUR_CHAR(l) xmlXPathCurrentChar(ctxt, &l) + +#define COPY_BUF(len,b,i,v) \ + if (len == 1) b[i++] = (xmlChar) v; \ + else i += xmlCopyChar(len,&b[i],v) + +#define NEXTL(k) ctxt->cur += k + +// XMLENGINE: NEXT was replaced with ctxt->cur++ since *ctxt->cur always !=0 there +// OOM: never +#define SKIP_BLANKS while (IS_BLANK_CH(*(ctxt->cur))) ctxt->cur++ + +#define CURRENT (*ctxt->cur) +#define NEXT ((*ctxt->cur) ? ctxt->cur++: ctxt->cur) + + +#ifndef DBL_DIG +#define DBL_DIG 16 +#endif +#ifndef DBL_EPSILON +#define DBL_EPSILON 1E-9 +#endif + +#define UPPER_DOUBLE 1E9 +#define LOWER_DOUBLE 1E-5 + +#define INTEGER_DIGITS DBL_DIG +#define FRACTION_DIGITS (DBL_DIG + 1) +#define EXPONENT_DIGITS (3 + 2) + +#if (_MSC_VER >= 1300) && (WINVER < 0x0500) +//VC7 or later, building with pre-VC7 runtime libraries +//extern "C" long _ftol( double ); //defined by VC6 C libs +//extern "C" long _ftol2( double dblSource ) { return _ftol( dblSource ); } +#endif + +/** + * xmlXPathFormatNumber: + * @number: number to format + * @buffer: output buffer + * @buffersize: size of output buffer + * + * Convert the number into a string representation. + * + * OOM: never + */ +static void +xmlXPathFormatNumber(double number, char buffer[], int buffersize) +{ // TODO: use IFs for clearer code / combine calls to snprintf() + switch (xmlXPathIsInf(number)) { + case 1: + if (buffersize > (int)sizeof("Infinity")) + snprintf(buffer, buffersize, "Infinity"); + break; + case -1: + if (buffersize > (int)sizeof("-Infinity")) + snprintf(buffer, buffersize, "-Infinity"); + break; + default: + if (xmlXPathIsNaN(number)) { + if (buffersize > (int)sizeof("NaN")) + snprintf(buffer, buffersize, "NaN"); + } else + if (number == 0 && xmlXPathGetSign(number) != 0) { + snprintf(buffer, buffersize, "0"); + } else + if (number == ((int) number)) { + char work[30]; + char *ptr, *cur; + int res, value = (int) number; + + ptr = &buffer[0]; + if (value < 0) { + *ptr++ = '-'; + value = -value; + } + if (value == 0) { + *ptr++ = '0'; + } else { + cur = &work[0]; + while (value != 0) { + res = value % 10; + value = value / 10; + *cur++ = '0' + res; + } + cur--; + while ((cur >= &work[0]) && (ptr - buffer < buffersize)) { + *ptr++ = *cur--; + } + } + if (ptr - buffer < buffersize) { + *ptr = 0; + } else if (buffersize > 0) { + ptr--; + *ptr = 0; + } + } else { + /* 3 is sign, decimal point, and terminating zero */ + char work[DBL_DIG + EXPONENT_DIGITS + 3]; + int integer_place, fraction_place; + char *ptr; + char *after_fraction; + double absolute_value; + int size; + + absolute_value = fabs(number); + + /* + * First choose format - scientific or regular floating point. + * In either case, result is in work, and after_fraction points + * just past the fractional part. + */ + if (((absolute_value > UPPER_DOUBLE) || (absolute_value < LOWER_DOUBLE)) && + (absolute_value != 0.0)) + { + /* Use scientific notation */ + integer_place = DBL_DIG + EXPONENT_DIGITS + 1; + fraction_place = DBL_DIG - 1; + snprintf(work, sizeof(work),"%*.*e", + integer_place, fraction_place, number); + after_fraction = strchr(work + DBL_DIG, 'e'); + } + else { + /* Use regular notation */ + if (absolute_value > 0.0) + integer_place = 1 + (int)log10(absolute_value); + else + integer_place = 0; + + fraction_place = (integer_place > 0) + ? DBL_DIG - integer_place + : DBL_DIG; + size = snprintf(work, sizeof(work), "%0.*f", fraction_place, number); + after_fraction = work + size; + } + + /* Remove fractional trailing zeroes */ + ptr = after_fraction; + while (*(--ptr) == '0') {}// EMPTY LOOP + + if (*ptr != '.') + ptr++; + while ((*ptr++ = *after_fraction++) != 0){} // EMPTY LOOP + + /* Finally copy result back to caller */ + size = strlen(work) + 1; + if (size > buffersize) { + work[buffersize - 1] = 0; + size = buffersize; + } + memmove(buffer, work, size); + } + break; + } +} + + +/************************************************************************ + * * + * Routines to handle NodeSets * + * * + ************************************************************************/ + +/** + * xmlXPathOrderDocElems: + * @doc: an input document + * + * Call this routine to speed up XPath computation on static documents. + * This stamps all the element nodes with the document order + * Like for line information, the order is kept in the element->content + * field, the value stored is actually - the node number (starting at -1) + * to be able to differentiate from line numbers. + * + * Returns the number of elements found in the document or -1 in case + * of error. + */ +long +xmlXPathOrderDocElems(xmlDocPtr doc) { + long count = 0; + xmlNodePtr cur; + + if (doc == NULL) + return(-1); + cur = doc->children; + while (cur != NULL) { + if (cur->type == XML_ELEMENT_NODE) { + cur->content = (xmlChar*)((void *) (-(++count))); + if (cur->children != NULL) { + cur = cur->children; + continue; + } + } + if (cur->next != NULL) { + cur = cur->next; + continue; + } + do { + cur = cur->parent; + if (cur == NULL) + break; + if (cur == (xmlNodePtr) doc) { + cur = NULL; + break; + } + if (cur->next != NULL) { + cur = cur->next; + break; + } + } while (cur != NULL); + } + return(count); +} + +/** + * xmlXPathCmpNodes: + * @node1: the first node + * @node2: the second node + * + * Compare two nodes w.r.t document order + * + * Returns -2 in case of error 1 if first point < second point, 0 if + * it's the same node, -1 otherwise + * + * OOM: never + */ +int +xmlXPathCmpNodes(xmlNodePtr node1, xmlNodePtr node2) { + int depth1, depth2; + int attr1 = 0, attr2 = 0; + xmlNodePtr attrNode1 = NULL, attrNode2 = NULL; + xmlNodePtr cur, root; + + if ((node1 == NULL) || (node2 == NULL)) + return(-2); + /* + * a couple of optimizations which will avoid computations in most cases + */ + if (node1->type == XML_ATTRIBUTE_NODE) { + attr1 = 1; + attrNode1 = node1; + node1 = node1->parent; + } + if (node2->type == XML_ATTRIBUTE_NODE) { + attr2 = 1; + attrNode2 = node2; + node2 = node2->parent; + } + if (node1 == node2) { + if (attr1 == attr2) { + /* not required, but we keep attributes in order */ + if (attr1 != 0) { + cur = attrNode2->prev; + while (cur != NULL) { + if (cur == attrNode1) + return (1); + cur = cur->prev; + } + return (-1); + } + return(0); + } + if (attr2 == 1) + return(1); + return(-1); + } + if ((node1->type == XML_NAMESPACE_DECL) || + (node2->type == XML_NAMESPACE_DECL)) + return(1); + if (node1 == node2->prev) + return(1); + if (node1 == node2->next) + return(-1); + + /* + * Speedup using document order if availble. + */ + if ((node1->type == XML_ELEMENT_NODE) && + (node2->type == XML_ELEMENT_NODE) && + (0 > (long) node1->content) && + (0 > (long) node2->content) && + (node1->doc == node2->doc)) { + long l1, l2; + + l1 = -((long) node1->content); + l2 = -((long) node2->content); + if (l1 < l2) + return(1); + if (l1 > l2) + return(-1); + } + + /* + * compute depth to root + */ + for (depth2 = 0, cur = node2;cur->parent != NULL;cur = cur->parent) { + if (cur == node1) + return(1); + depth2++; + } + root = cur; + for (depth1 = 0, cur = node1;cur->parent != NULL;cur = cur->parent) { + if (cur == node2) + return(-1); + depth1++; + } + /* + * Distinct document (or distinct entities :-( ) case. + */ + if (root != cur) { + return(-2); + } + /* + * get the nearest common ancestor. + */ + while (depth1 > depth2) { + depth1--; + node1 = node1->parent; + } + while (depth2 > depth1) { + depth2--; + node2 = node2->parent; + } + while (node1->parent != node2->parent) { + node1 = node1->parent; + node2 = node2->parent; + /* should not happen but just in case ... */ + if ((node1 == NULL) || (node2 == NULL)) + return(-2); + } + /* + * Find who's first. + */ + if (node1 == node2->prev) + return(1); + if (node1 == node2->next) + return(-1); + /* + * Speedup using document order if availble. + */ + if ((node1->type == XML_ELEMENT_NODE) && + (node2->type == XML_ELEMENT_NODE) && + (0 > (long) node1->content) && + (0 > (long) node2->content) && + (node1->doc == node2->doc)) { + long l1, l2; + + l1 = -((long) node1->content); + l2 = -((long) node2->content); + if (l1 < l2) + return(1); + if (l1 > l2) + return(-1); + } + + for (cur = node1->next;cur != NULL;cur = cur->next) + if (cur == node2) + return(1); + return(-1); /* assume there is no sibling list corruption */ +} + +/** + * xmlXPathNodeSetSort: + * @set: the node set + * + * Sort the node set in document order + * + * OOM: never + */ +void +xmlXPathNodeSetSort(xmlNodeSetPtr set) { + int i, j, incr, len; + xmlNodePtr tmp; + + if (set == NULL) + return; + + /* Use Shell's sort to sort the node-set */ + len = set->nodeNr; + for (incr = len / 2; incr > 0; incr /= 2) { + for (i = incr; i < len; i++) { + j = i - incr; + while (j >= 0) { + if (xmlXPathCmpNodes(set->nodeTab[j], set->nodeTab[j + incr]) == -1) + { + tmp = set->nodeTab[j]; + set->nodeTab[j] = set->nodeTab[j + incr]; + set->nodeTab[j + incr] = tmp; + j -= incr; + } else + break; + } + } + } +} + +#define XML_NODESET_DEFAULT 10 +/** + * xmlXPathNodeSetDupNs: + * @node: the parent node of the namespace XPath node + * @ns: the libxml namespace declaration node. + * + * Namespace node in libxml don't match the XPath semantic. In a node set + * the namespace nodes are duplicated and the next pointer is set to the + * parent node in the XPath semantic. + * + * Returns the newly created object. + * + * OOM: possible --> returns NULL for valid arguments, sets OOM flag + */ +static xmlNodePtr +xmlXPathNodeSetDupNs(xmlNodePtr node, xmlNsPtr ns) { + xmlNsPtr cur; + + if ((ns == NULL) || (ns->type != XML_NAMESPACE_DECL)) + return(NULL); + if ((node == NULL) || (node->type == XML_NAMESPACE_DECL)) + return((xmlNodePtr) ns); + + /* + * Allocate a new Namespace and fill the fields. + */ + cur = (xmlNsPtr) xmlMalloc(sizeof(xmlNs)); + if (cur == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("duplicating namespace\n")); + return(NULL); + } + memset(cur, 0, sizeof(xmlNs)); + cur->type = XML_NAMESPACE_DECL; + // TODO: Check OOM conditions.. + if (ns->href != NULL) + if(! (cur->href = xmlStrdup(ns->href))) + goto OOM;; + if (ns->prefix != NULL) + if(! (cur->prefix = xmlStrdup(ns->prefix))) + goto OOM; + + cur->next = (xmlNsPtr) node; + return((xmlNodePtr) cur); +//--------------------- +OOM: + xmlFree(cur); + return NULL; +} + +/** + * xmlXPathNodeSetFreeNs: + * @ns: the XPath namespace node found in a nodeset. + * + * Namespace nodes in libxml don't match the XPath semantic. In a node set + * the namespace nodes are duplicated and the next pointer is set to the + * parent node in the XPath semantic. Check if such a node needs to be freed + * + * OOM: never + */ +void +xmlXPathNodeSetFreeNs(xmlNsPtr ns) { + if ((ns == NULL) || (ns->type != XML_NAMESPACE_DECL)) + return; + + if ((ns->next != NULL) && (ns->next->type != XML_NAMESPACE_DECL)) { + if (ns->href != NULL) + xmlFree((xmlChar *)ns->href); + if (ns->prefix != NULL) + xmlFree((xmlChar *)ns->prefix); + xmlFree(ns); + } +} + +/** + * xmlXPathNodeSetCreate: + * @val: an initial xmlNodePtr, or NULL + * + * Create a new xmlNodeSetPtr of type double and of value @val + * + * Returns the newly created object. + * + * OOM: possible --> returns NULL and sets OOM flag + */ +xmlNodeSetPtr +xmlXPathNodeSetCreate(xmlNodePtr val) { + xmlNodeSetPtr ret; + + ret = (xmlNodeSetPtr) xmlMalloc(sizeof(xmlNodeSet)); + if (ret == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("creating nodeset\n")); + return(NULL); + } + memset(ret, 0 , (size_t) sizeof(xmlNodeSet)); + + if (val != NULL) { + xmlNodePtr nval; + // TODO: Optimize or make adjustable the allocation size of NodeSet + ret->nodeTab = (xmlNodePtr *) xmlMalloc(XML_NODESET_DEFAULT * sizeof(xmlNodePtr)); + if (ret->nodeTab == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("creating nodeset\n")); + goto OOM; + } + memset(ret->nodeTab, 0, XML_NODESET_DEFAULT * (size_t) sizeof(xmlNodePtr)); + ret->nodeMax = XML_NODESET_DEFAULT; + if (val->type == XML_NAMESPACE_DECL) { + xmlNsPtr ns = (xmlNsPtr) val; + nval = xmlXPathNodeSetDupNs((xmlNodePtr) ns->next, ns); + // TODO: OOM: Chrck OOM + if(OOM_FLAG) + goto OOM; + } else { + nval = val; + } + ret->nodeTab[ret->nodeNr++] = nval; + } + return(ret); +//------------------- +OOM: + xmlFree(ret); + return(NULL); +} + +/** + * xmlXPathNodeSetContains: + * @cur: the node-set + * @val: the node + * + * checks whether @cur contains @val + * + * Returns true (1) if @cur contains @val, false (0) otherwise + * + * OOM: never + */ +int +xmlXPathNodeSetContains (xmlNodeSetPtr cur, xmlNodePtr val) { + int i; + + if (val->type == XML_NAMESPACE_DECL) { + for (i = 0; i < cur->nodeNr; i++) { + if (cur->nodeTab[i]->type == XML_NAMESPACE_DECL) { + xmlNsPtr ns1, ns2; + + ns1 = (xmlNsPtr) val; + ns2 = (xmlNsPtr) cur->nodeTab[i]; + if (ns1 == ns2) + return(1); + if ((ns1->next != NULL) && + (ns2->next == ns1->next) && + (xmlStrEqual(ns1->prefix, ns2->prefix))) + return(1); + } + } + } else { + for (i = 0; i < cur->nodeNr; i++) { + if (cur->nodeTab[i] == val) + return(1); + } + } + return(0); +} + + + +/* + TODO: OPTIMIZATION: xmlXPathNodeSetAddNs, xmlXPathNodeSetAdd and xmlXPathNodeSetAddUnique are the same code + +*/ + +/** + * xmlXPathNodeSetAddNs: + * @cur: the initial node set + * @node: the hosting node + * @ns: a the namespace node + * + * add a new namespace node to an existing NodeSet + */ +void +xmlXPathNodeSetAddNs(xmlNodeSetPtr cur, xmlNodePtr node, xmlNsPtr ns) { + int i; + + if ((ns == NULL) || (node == NULL) || (ns->type != XML_NAMESPACE_DECL) || + (node->type != XML_ELEMENT_NODE)) + return; + + /* @@ with_ns to check whether namespace nodes should be looked at @@ */ + /* + * prevent duplicates + */ + for (i = 0;i < cur->nodeNr;i++) { + if ((cur->nodeTab[i] != NULL) && + (cur->nodeTab[i]->type == XML_NAMESPACE_DECL) && + (((xmlNsPtr)cur->nodeTab[i])->next == (xmlNsPtr) node) && + (xmlStrEqual(ns->prefix, ((xmlNsPtr)cur->nodeTab[i])->prefix))) + return; + } + + /* + * grow the nodeTab if needed + */ + if (cur->nodeMax == 0) { + cur->nodeTab = (xmlNodePtr *) xmlMalloc(XML_NODESET_DEFAULT * + sizeof(xmlNodePtr)); + if (cur->nodeTab == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("growing nodeset\n")); + return; + } + memset(cur->nodeTab, 0 , + XML_NODESET_DEFAULT * (size_t) sizeof(xmlNodePtr)); + cur->nodeMax = XML_NODESET_DEFAULT; + } else if (cur->nodeNr == cur->nodeMax) { + xmlNodePtr *temp; + + cur->nodeMax *= 2; + temp = (xmlNodePtr *) xmlRealloc(cur->nodeTab, cur->nodeMax * + sizeof(xmlNodePtr)); + if (temp == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("growing nodeset\n")); + return; + } + cur->nodeTab = temp; + } + cur->nodeTab[cur->nodeNr++] = xmlXPathNodeSetDupNs(node, ns); +} + +/** + * xmlXPathNodeSetAdd: + * @cur: the initial node set + * @val: a new xmlNodePtr + * + * add a new xmlNodePtr to an existing NodeSet + */ +void +xmlXPathNodeSetAdd(xmlNodeSetPtr cur, xmlNodePtr val) { + int i; + + if (val == NULL) return; + +#if 0 + if ((val->type == XML_ELEMENT_NODE) && (val->name[0] == ' ')) + return; /* an XSLT fake node */ +#endif + + /* @@ with_ns to check whether namespace nodes should be looked at @@ */ + /* + * prevent duplcates + */ + for (i = 0;i < cur->nodeNr;i++) + if (cur->nodeTab[i] == val) return; + + /* + * grow the nodeTab if needed + */ + if (cur->nodeMax == 0) { + cur->nodeTab = (xmlNodePtr *) xmlMalloc(XML_NODESET_DEFAULT * + sizeof(xmlNodePtr)); + if (cur->nodeTab == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("growing nodeset\n")); + return; + } + memset(cur->nodeTab, 0 , + XML_NODESET_DEFAULT * (size_t) sizeof(xmlNodePtr)); + cur->nodeMax = XML_NODESET_DEFAULT; + } else if (cur->nodeNr == cur->nodeMax) { + xmlNodePtr *temp; + // TODO: Realocation policy may be managed + cur->nodeMax *= 2; + temp = (xmlNodePtr *) xmlRealloc(cur->nodeTab, cur->nodeMax * + sizeof(xmlNodePtr)); + if (temp == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("growing nodeset\n")); + return; + } + cur->nodeTab = temp; + } + if (val->type == XML_NAMESPACE_DECL) { + xmlNsPtr ns = (xmlNsPtr) val; + + cur->nodeTab[cur->nodeNr++] = + xmlXPathNodeSetDupNs((xmlNodePtr) ns->next, ns); + } else + cur->nodeTab[cur->nodeNr++] = val; +} + +/** + * xmlXPathNodeSetAddUnique: + * @cur: the initial node set + * @val: a new xmlNodePtr + * + * add a new xmlNodePtr to an existing NodeSet, optimized version + * when we are sure the node is not already in the set. + */ +void +xmlXPathNodeSetAddUnique(xmlNodeSetPtr cur, xmlNodePtr val) { + if (val == NULL) return; + + // TODO: Rudiments of XSLT - find out how these affect the XPath implementation +#if 0 + if ((val->type == XML_ELEMENT_NODE) && (val->name[0] == ' ')) + return; /* an XSLT fake node */ +#endif + + /* @@ with_ns to check whether namespace nodes should be looked at @@ */ + /* + * grow the nodeTab if needed + */ + if (cur->nodeMax == 0) { + cur->nodeTab = (xmlNodePtr *) xmlMalloc(XML_NODESET_DEFAULT * sizeof(xmlNodePtr)); + + if (cur->nodeTab == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("growing nodeset\n")); + return; + } + memset(cur->nodeTab, 0 , XML_NODESET_DEFAULT * (size_t) sizeof(xmlNodePtr)); + + cur->nodeMax = XML_NODESET_DEFAULT; + } else if (cur->nodeNr == cur->nodeMax) { + xmlNodePtr *temp; + + cur->nodeMax *= 2; + temp = (xmlNodePtr *) xmlRealloc(cur->nodeTab, cur->nodeMax * + sizeof(xmlNodePtr)); + if (temp == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("growing nodeset\n")); + return; + } + cur->nodeTab = temp; + } + if (val->type == XML_NAMESPACE_DECL) { + xmlNsPtr ns = (xmlNsPtr) val; + + cur->nodeTab[cur->nodeNr++] = + xmlXPathNodeSetDupNs((xmlNodePtr) ns->next, ns); + } else + cur->nodeTab[cur->nodeNr++] = val; +} + +/** + * xmlXPathNodeSetMerge: + * @val1: the first NodeSet or NULL + * @val2: the second NodeSet + * + * Merges two nodesets, all nodes from @val2 are added to @val1 + * if @val1 is NULL, a new set is created and copied from @val2 + * + * Returns @val1 once extended or NULL in case of error. + */ +xmlNodeSetPtr +xmlXPathNodeSetMerge(xmlNodeSetPtr val1, xmlNodeSetPtr val2) { + int i, j, initNr, skip; + + if (val2 == NULL) return(val1); + if (val1 == NULL) { + val1 = xmlXPathNodeSetCreate(NULL); + } + + /* @@ with_ns to check whether namespace nodes should be looked at @@ */ + initNr = val1->nodeNr; + + for (i = 0;i < val2->nodeNr;i++) { + /* + * check against duplicates + */ + skip = 0; + for (j = 0; j < initNr; j++) { + if (val1->nodeTab[j] == val2->nodeTab[i]) { + skip = 1; + break; + } else if ((val1->nodeTab[j]->type == XML_NAMESPACE_DECL) && + (val2->nodeTab[i]->type == XML_NAMESPACE_DECL)) { + xmlNsPtr ns1, ns2; + ns1 = (xmlNsPtr) val1->nodeTab[j]; + ns2 = (xmlNsPtr) val2->nodeTab[i]; + if ((ns1->next == ns2->next) && + (xmlStrEqual(ns1->prefix, ns2->prefix))) { + skip = 1; + break; + } + } + } + if (skip) + continue; + + /* + * grow the nodeTab if needed + */ + if (val1->nodeMax == 0) { + val1->nodeTab = (xmlNodePtr *) xmlMalloc(XML_NODESET_DEFAULT * + sizeof(xmlNodePtr)); + if (val1->nodeTab == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("merging nodeset\n")); + return(NULL); + } + memset(val1->nodeTab, 0 , + XML_NODESET_DEFAULT * (size_t) sizeof(xmlNodePtr)); + val1->nodeMax = XML_NODESET_DEFAULT; + } else if (val1->nodeNr == val1->nodeMax) { + xmlNodePtr *temp; + + val1->nodeMax *= 2; + temp = (xmlNodePtr *) xmlRealloc(val1->nodeTab, val1->nodeMax * + sizeof(xmlNodePtr)); + if (temp == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("merging nodeset\n")); + return(NULL); + } + val1->nodeTab = temp; + } + if (val2->nodeTab[i]->type == XML_NAMESPACE_DECL) { + xmlNsPtr ns = (xmlNsPtr) val2->nodeTab[i]; + + val1->nodeTab[val1->nodeNr++] = + xmlXPathNodeSetDupNs((xmlNodePtr) ns->next, ns); + } else + val1->nodeTab[val1->nodeNr++] = val2->nodeTab[i]; + } + + return(val1); +} + +/** + * xmlXPathNodeSetMergeUnique: + * @val1: the first NodeSet or NULL + * @val2: the second NodeSet + * + * Merges two nodesets, all nodes from @val2 are added to @val1 + * if @val1 is NULL, a new set is created and copied from @val2 + * + * Returns @val1 once extended or NULL in case of error. + */ +static xmlNodeSetPtr +xmlXPathNodeSetMergeUnique(xmlNodeSetPtr val1, xmlNodeSetPtr val2) { + int i; + + if (val2 == NULL) return(val1); + if (val1 == NULL) { + val1 = xmlXPathNodeSetCreate(NULL); + } + + /* @@ with_ns to check whether namespace nodes should be looked at @@ */ + + for (i = 0;i < val2->nodeNr;i++) { + /* + * grow the nodeTab if needed + */ + if (val1->nodeMax == 0) { + val1->nodeTab = (xmlNodePtr *) xmlMalloc(XML_NODESET_DEFAULT * + sizeof(xmlNodePtr)); + if (val1->nodeTab == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("merging nodeset\n")); + return(NULL); + } + memset(val1->nodeTab, 0 , + XML_NODESET_DEFAULT * (size_t) sizeof(xmlNodePtr)); + val1->nodeMax = XML_NODESET_DEFAULT; + } else if (val1->nodeNr == val1->nodeMax) { + xmlNodePtr *temp; + + val1->nodeMax *= 2; + temp = (xmlNodePtr *) xmlRealloc(val1->nodeTab, val1->nodeMax * + sizeof(xmlNodePtr)); + if (temp == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("merging nodeset\n")); + return(NULL); + } + val1->nodeTab = temp; + } + if (val2->nodeTab[i]->type == XML_NAMESPACE_DECL) { + xmlNsPtr ns = (xmlNsPtr) val2->nodeTab[i]; + + val1->nodeTab[val1->nodeNr++] = + xmlXPathNodeSetDupNs((xmlNodePtr) ns->next, ns); + } else + val1->nodeTab[val1->nodeNr++] = val2->nodeTab[i]; + } + + return(val1); +} + +/** + * xmlXPathNodeSetDel: + * @cur: the initial node set + * @val: an xmlNodePtr + * + * Removes an xmlNodePtr from an existing NodeSet + */ +void +xmlXPathNodeSetDel(xmlNodeSetPtr cur, xmlNodePtr val) { + int i; + + if (cur == NULL) return; + if (val == NULL) return; + + /* + * find node in nodeTab + */ + for (i = 0;i < cur->nodeNr;i++) + if (cur->nodeTab[i] == val) break; + + if (i >= cur->nodeNr) { /* not found */ +#ifdef DEBUG + xmlGenericError(xmlGenericErrorContext, + "xmlXPathNodeSetDel: Node %s wasn't found in NodeList\n", + val->name); +#endif + return; + } + if ((cur->nodeTab[i] != NULL) && + (cur->nodeTab[i]->type == XML_NAMESPACE_DECL)) + xmlXPathNodeSetFreeNs((xmlNsPtr) cur->nodeTab[i]); + cur->nodeNr--; + for (;i < cur->nodeNr;i++) + cur->nodeTab[i] = cur->nodeTab[i + 1]; + cur->nodeTab[cur->nodeNr] = NULL; +} + +/** + * xmlXPathNodeSetRemove: + * @cur: the initial node set + * @val: the index to remove + * + * Removes an entry from an existing NodeSet list. + */ +void +xmlXPathNodeSetRemove(xmlNodeSetPtr cur, int val) { + if (cur == NULL) return; + if (val >= cur->nodeNr) return; + if ((cur->nodeTab[val] != NULL) && + (cur->nodeTab[val]->type == XML_NAMESPACE_DECL)) + xmlXPathNodeSetFreeNs((xmlNsPtr) cur->nodeTab[val]); + cur->nodeNr--; + for (;val < cur->nodeNr;val++) + cur->nodeTab[val] = cur->nodeTab[val + 1]; + cur->nodeTab[cur->nodeNr] = NULL; +} + +/** + * xmlXPathFreeNodeSet: + * @obj: the xmlNodeSetPtr to free + * + * Free the NodeSet compound (not the actual nodes !). + */ +void +xmlXPathFreeNodeSet(xmlNodeSetPtr obj) { + if (obj == NULL) return; + if (obj->nodeTab != NULL) { + int i; + + /* @@ with_ns to check whether namespace nodes should be looked at @@ */ + for (i = 0;i < obj->nodeNr;i++) + if ((obj->nodeTab[i] != NULL) && + (obj->nodeTab[i]->type == XML_NAMESPACE_DECL)) + xmlXPathNodeSetFreeNs((xmlNsPtr) obj->nodeTab[i]); + xmlFree(obj->nodeTab); + } + xmlFree(obj); +} + +/** + * xmlXPathFreeValueTree: + * @obj: the xmlNodeSetPtr to free + * + * Free the NodeSet compound and the actual tree, this is different + * from xmlXPathFreeNodeSet() + */ +static void +xmlXPathFreeValueTree(xmlNodeSetPtr obj) { + int i; + + if (obj == NULL) return; + + if (obj->nodeTab != NULL) { + for (i = 0;i < obj->nodeNr;i++) { + if (obj->nodeTab[i] != NULL) { + if (obj->nodeTab[i]->type == XML_NAMESPACE_DECL) { + xmlXPathNodeSetFreeNs((xmlNsPtr) obj->nodeTab[i]); + } else { + xmlFreeNodeList(obj->nodeTab[i]); + } + } + } + xmlFree(obj->nodeTab); + } + xmlFree(obj); +} + +#if defined(DEBUG) || defined(DEBUG_STEP) +/** + * xmlGenericErrorContextNodeSet: + * @output: a FILE * for the output + * @obj: the xmlNodeSetPtr to display + * + * Quick display of a NodeSet + */ +void +xmlGenericErrorContextNodeSet(FILE *output, xmlNodeSetPtr obj) { + int i; + + if (output == NULL) output = xmlGenericErrorContext; + if (obj == NULL) { + fprintf(output, "NodeSet == NULL !\n"); + return; + } + if (obj->nodeNr == 0) { + fprintf(output, "NodeSet is empty\n"); + return; + } + if (obj->nodeTab == NULL) { + fprintf(output, " nodeTab == NULL !\n"); + return; + } + for (i = 0; i < obj->nodeNr; i++) { + if (obj->nodeTab[i] == NULL) { + fprintf(output, " NULL !\n"); + return; + } + if ((obj->nodeTab[i]->type == XML_DOCUMENT_NODE) || + (obj->nodeTab[i]->type == XML_HTML_DOCUMENT_NODE)) + fprintf(output, " /"); + else if (obj->nodeTab[i]->name == NULL) + fprintf(output, " noname!"); + else fprintf(output, " %s", obj->nodeTab[i]->name); + } + fprintf(output, "\n"); +} +#endif + +/** + * xmlXPathNewNodeSet: + * @val: the NodePtr value + * + * Create a new xmlXPathObjectPtr of type NodeSet and initialize + * it with the single Node @val + * + * Returns the newly created object. + */ +xmlXPathObjectPtr +xmlXPathNewNodeSet(xmlNodePtr val) { + xmlXPathObjectPtr ret; + + ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); + if (ret == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("creating nodeset\n")); + return(NULL); + } + memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); + ret->type = XPATH_NODESET; + ret->boolval = 0; + ret->nodesetval = xmlXPathNodeSetCreate(val); + if(OOM_FLAG) + { + xmlXPathFreeObject(ret); + return(NULL); + } + /* @@ with_ns to check whether namespace nodes should be looked at @@ */ + return(ret); +} + +/** + * xmlXPathNewValueTree: + * @val: the NodePtr value + * + * Create a new xmlXPathObjectPtr of type Value Tree (XSLT) and initialize + * it with the tree root @val + * + * Returns the newly created object. + */ +xmlXPathObjectPtr +xmlXPathNewValueTree(xmlNodePtr val) { + xmlXPathObjectPtr ret; + + ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); + if (ret == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("creating result value tree\n")); + return(NULL); + } + memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); + ret->type = XPATH_XSLT_TREE; + ret->boolval = 1; + ret->user = (void *) val; + ret->nodesetval = xmlXPathNodeSetCreate(val); + return(ret); +} + +/** + * xmlXPathNewNodeSetList: + * @val: an existing NodeSet + * + * Create a new xmlXPathObjectPtr of type NodeSet and initialize + * it with the Nodeset @val + * + * Returns the newly created object. + */ +xmlXPathObjectPtr +xmlXPathNewNodeSetList(xmlNodeSetPtr val) +{ + xmlXPathObjectPtr ret; + int i; + // TODO: CHECK OOM everywhere + if (val == NULL) + ret = NULL; + else if (val->nodeTab == NULL) + ret = xmlXPathNewNodeSet(NULL); + else { + ret = xmlXPathNewNodeSet(val->nodeTab[0]); + for (i = 1; i < val->nodeNr; ++i) + xmlXPathNodeSetAddUnique(ret->nodesetval, val->nodeTab[i]); + } + + return (ret); +} + +/** + * xmlXPathWrapNodeSet: + * @val: the NodePtr value + * + * Wrap the Nodeset @val in a new xmlXPathObjectPtr + * + * Returns the newly created object. + */ +xmlXPathObjectPtr +xmlXPathWrapNodeSet(xmlNodeSetPtr val) { + xmlXPathObjectPtr ret; + + ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); + if (ret == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("creating node set object\n")); + return(NULL); + } + memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); + ret->type = XPATH_NODESET; + ret->nodesetval = val; + return(ret); +} + +/** + * xmlXPathFreeNodeSetList: + * @obj: an existing NodeSetList object + * + * Free up the xmlXPathObjectPtr @obj but don't deallocate the objects in + * the list contrary to xmlXPathFreeObject(). + */ +void +xmlXPathFreeNodeSetList(xmlXPathObjectPtr obj) { + if (obj == NULL) return; + xmlFree(obj); +} + +/** + * xmlXPathDifference: + * @nodes1: a node-set + * @nodes2: a node-set + * + * Implements the EXSLT - Sets difference() function: + * node-set set:difference (node-set, node-set) + * + * Returns the difference between the two node sets, or nodes1 if + * nodes2 is empty + */ +xmlNodeSetPtr +xmlXPathDifference (xmlNodeSetPtr nodes1, xmlNodeSetPtr nodes2) { + xmlNodeSetPtr ret; + int i, l1; + xmlNodePtr cur; + + if (xmlXPathNodeSetIsEmpty(nodes2)) + return(nodes1); + + ret = xmlXPathNodeSetCreate(NULL); + if (xmlXPathNodeSetIsEmpty(nodes1)) + return(ret); + + l1 = xmlXPathNodeSetGetLength(nodes1); + + for (i = 0; i < l1; i++) { + cur = xmlXPathNodeSetItem(nodes1, i); + if (!xmlXPathNodeSetContains(nodes2, cur)) + xmlXPathNodeSetAddUnique(ret, cur); + } + return(ret); +} + +/** + * xmlXPathIntersection: + * @nodes1: a node-set + * @nodes2: a node-set + * + * Implements the EXSLT - Sets intersection() function: + * node-set set:intersection (node-set, node-set) + * + * Returns a node set comprising the nodes that are within both the + * node sets passed as arguments + */ +xmlNodeSetPtr +xmlXPathIntersection (xmlNodeSetPtr nodes1, xmlNodeSetPtr nodes2) { + xmlNodeSetPtr ret = xmlXPathNodeSetCreate(NULL); + int i, l1; + xmlNodePtr cur; + + if (xmlXPathNodeSetIsEmpty(nodes1)) + return(ret); + if (xmlXPathNodeSetIsEmpty(nodes2)) + return(ret); + + l1 = xmlXPathNodeSetGetLength(nodes1); + + for (i = 0; i < l1; i++) { + cur = xmlXPathNodeSetItem(nodes1, i); + if (xmlXPathNodeSetContains(nodes2, cur)) + xmlXPathNodeSetAddUnique(ret, cur); + } + return(ret); +} + +/** + * xmlXPathDistinctSorted: + * @nodes: a node-set, sorted by document order + * + * Implements the EXSLT - Sets distinct() function: + * node-set set:distinct (node-set) + * + * Returns a subset of the nodes contained in @nodes, or @nodes if + * it is empty + */ +xmlNodeSetPtr +xmlXPathDistinctSorted (xmlNodeSetPtr nodes) { + xmlNodeSetPtr ret; + xmlHashTablePtr hash; + int i, l; + xmlChar * strval; + xmlNodePtr cur; + + if (xmlXPathNodeSetIsEmpty(nodes)) + return(nodes); + + ret = xmlXPathNodeSetCreate(NULL); + l = xmlXPathNodeSetGetLength(nodes); + hash = xmlHashCreate (l); + for (i = 0; i < l; i++) { + cur = xmlXPathNodeSetItem(nodes, i); + strval = xmlXPathCastNodeToString(cur); + if (xmlHashLookup(hash, strval) == NULL) { + xmlHashAddEntry(hash, strval, strval); + xmlXPathNodeSetAddUnique(ret, cur); + } else { + xmlFree(strval); + } + } + xmlHashFree(hash, (xmlHashDeallocator) xmlFree); + return(ret); +} + +/** + * xmlXPathDistinct: + * @nodes: a node-set + * + * Implements the EXSLT - Sets distinct() function: + * node-set set:distinct (node-set) + * @nodes is sorted by document order, then #exslSetsDistinctSorted + * is called with the sorted node-set + * + * Returns a subset of the nodes contained in @nodes, or @nodes if + * it is empty + */ +xmlNodeSetPtr +xmlXPathDistinct (xmlNodeSetPtr nodes) { + if (xmlXPathNodeSetIsEmpty(nodes)) + return(nodes); + + xmlXPathNodeSetSort(nodes); + return(xmlXPathDistinctSorted(nodes)); +} + +/** + * xmlXPathHasSameNodes: + * @nodes1: a node-set + * @nodes2: a node-set + * + * Implements the EXSLT - Sets has-same-nodes function: + * boolean set:has-same-node(node-set, node-set) + * + * Returns true (1) if @nodes1 shares any node with @nodes2, false (0) + * otherwise + */ +int +xmlXPathHasSameNodes (xmlNodeSetPtr nodes1, xmlNodeSetPtr nodes2) { + int i, l; + xmlNodePtr cur; + + if (xmlXPathNodeSetIsEmpty(nodes1) || + xmlXPathNodeSetIsEmpty(nodes2)) + return(0); + + l = xmlXPathNodeSetGetLength(nodes1); + for (i = 0; i < l; i++) { + cur = xmlXPathNodeSetItem(nodes1, i); + if (xmlXPathNodeSetContains(nodes2, cur)) + return(1); + } + return(0); +} + +/** + * xmlXPathNodeLeadingSorted: + * @nodes: a node-set, sorted by document order + * @node: a node + * + * Implements the EXSLT - Sets leading() function: + * node-set set:leading (node-set, node-set) + * + * Returns the nodes in @nodes that precede @node in document order, + * @nodes if @node is NULL or an empty node-set if @nodes + * doesn't contain @node + */ +xmlNodeSetPtr +xmlXPathNodeLeadingSorted (xmlNodeSetPtr nodes, xmlNodePtr node) { + int i, l; + xmlNodePtr cur; + xmlNodeSetPtr ret; + + if (node == NULL) + return(nodes); + + ret = xmlXPathNodeSetCreate(NULL); + if (xmlXPathNodeSetIsEmpty(nodes) || + (!xmlXPathNodeSetContains(nodes, node))) + return(ret); + + l = xmlXPathNodeSetGetLength(nodes); + for (i = 0; i < l; i++) { + cur = xmlXPathNodeSetItem(nodes, i); + if (cur == node) + break; + xmlXPathNodeSetAddUnique(ret, cur); + } + return(ret); +} + +/** + * xmlXPathNodeLeading: + * @nodes: a node-set + * @node: a node + * + * Implements the EXSLT - Sets leading() function: + * node-set set:leading (node-set, node-set) + * @nodes is sorted by document order, then #exslSetsNodeLeadingSorted + * is called. + * + * Returns the nodes in @nodes that precede @node in document order, + * @nodes if @node is NULL or an empty node-set if @nodes + * doesn't contain @node + */ +xmlNodeSetPtr +xmlXPathNodeLeading (xmlNodeSetPtr nodes, xmlNodePtr node) { + xmlXPathNodeSetSort(nodes); + return(xmlXPathNodeLeadingSorted(nodes, node)); +} + +/** + * xmlXPathLeadingSorted: + * @nodes1: a node-set, sorted by document order + * @nodes2: a node-set, sorted by document order + * + * Implements the EXSLT - Sets leading() function: + * node-set set:leading (node-set, node-set) + * + * Returns the nodes in @nodes1 that precede the first node in @nodes2 + * in document order, @nodes1 if @nodes2 is NULL or empty or + * an empty node-set if @nodes1 doesn't contain @nodes2 + */ +xmlNodeSetPtr +xmlXPathLeadingSorted (xmlNodeSetPtr nodes1, xmlNodeSetPtr nodes2) { + if (xmlXPathNodeSetIsEmpty(nodes2)) + return(nodes1); + return(xmlXPathNodeLeadingSorted(nodes1, + xmlXPathNodeSetItem(nodes2, 1))); +} + +/** + * xmlXPathLeading: + * @nodes1: a node-set + * @nodes2: a node-set + * + * Implements the EXSLT - Sets leading() function: + * node-set set:leading (node-set, node-set) + * @nodes1 and @nodes2 are sorted by document order, then + * #exslSetsLeadingSorted is called. + * + * Returns the nodes in @nodes1 that precede the first node in @nodes2 + * in document order, @nodes1 if @nodes2 is NULL or empty or + * an empty node-set if @nodes1 doesn't contain @nodes2 + */ +xmlNodeSetPtr +xmlXPathLeading (xmlNodeSetPtr nodes1, xmlNodeSetPtr nodes2) { + if (xmlXPathNodeSetIsEmpty(nodes2)) + return(nodes1); + if (xmlXPathNodeSetIsEmpty(nodes1)) + return(xmlXPathNodeSetCreate(NULL)); + xmlXPathNodeSetSort(nodes1); + xmlXPathNodeSetSort(nodes2); + return(xmlXPathNodeLeadingSorted(nodes1, + xmlXPathNodeSetItem(nodes2, 1))); +} + +/** + * xmlXPathNodeTrailingSorted: + * @nodes: a node-set, sorted by document order + * @node: a node + * + * Implements the EXSLT - Sets trailing() function: + * node-set set:trailing (node-set, node-set) + * + * Returns the nodes in @nodes that follow @node in document order, + * @nodes if @node is NULL or an empty node-set if @nodes + * doesn't contain @node + */ +xmlNodeSetPtr +xmlXPathNodeTrailingSorted (xmlNodeSetPtr nodes, xmlNodePtr node) { + int i, l; + xmlNodePtr cur; + xmlNodeSetPtr ret; + + if (node == NULL) + return(nodes); + + ret = xmlXPathNodeSetCreate(NULL); + if (xmlXPathNodeSetIsEmpty(nodes) || + (!xmlXPathNodeSetContains(nodes, node))) + return(ret); + + l = xmlXPathNodeSetGetLength(nodes); + for (i = l; i > 0; i--) { + cur = xmlXPathNodeSetItem(nodes, i); + if (cur == node) + break; + xmlXPathNodeSetAddUnique(ret, cur); + } + return(ret); +} + +/** + * xmlXPathNodeTrailing: + * @nodes: a node-set + * @node: a node + * + * Implements the EXSLT - Sets trailing() function: + * node-set set:trailing (node-set, node-set) + * @nodes is sorted by document order, then #xmlXPathNodeTrailingSorted + * is called. + * + * Returns the nodes in @nodes that follow @node in document order, + * @nodes if @node is NULL or an empty node-set if @nodes + * doesn't contain @node + */ +xmlNodeSetPtr +xmlXPathNodeTrailing (xmlNodeSetPtr nodes, xmlNodePtr node) { + xmlXPathNodeSetSort(nodes); + return(xmlXPathNodeTrailingSorted(nodes, node)); +} + +/** + * xmlXPathTrailingSorted: + * @nodes1: a node-set, sorted by document order + * @nodes2: a node-set, sorted by document order + * + * Implements the EXSLT - Sets trailing() function: + * node-set set:trailing (node-set, node-set) + * + * Returns the nodes in @nodes1 that follow the first node in @nodes2 + * in document order, @nodes1 if @nodes2 is NULL or empty or + * an empty node-set if @nodes1 doesn't contain @nodes2 + */ +xmlNodeSetPtr +xmlXPathTrailingSorted (xmlNodeSetPtr nodes1, xmlNodeSetPtr nodes2) { + if (xmlXPathNodeSetIsEmpty(nodes2)) + return(nodes1); + return(xmlXPathNodeTrailingSorted(nodes1, + xmlXPathNodeSetItem(nodes2, 0))); +} + +/** + * xmlXPathTrailing: + * @nodes1: a node-set + * @nodes2: a node-set + * + * Implements the EXSLT - Sets trailing() function: + * node-set set:trailing (node-set, node-set) + * @nodes1 and @nodes2 are sorted by document order, then + * #xmlXPathTrailingSorted is called. + * + * Returns the nodes in @nodes1 that follow the first node in @nodes2 + * in document order, @nodes1 if @nodes2 is NULL or empty or + * an empty node-set if @nodes1 doesn't contain @nodes2 + */ +xmlNodeSetPtr +xmlXPathTrailing (xmlNodeSetPtr nodes1, xmlNodeSetPtr nodes2) { + if (xmlXPathNodeSetIsEmpty(nodes2)) + return(nodes1); + if (xmlXPathNodeSetIsEmpty(nodes1)) + return(xmlXPathNodeSetCreate(NULL)); + xmlXPathNodeSetSort(nodes1); + xmlXPathNodeSetSort(nodes2); + return(xmlXPathNodeTrailingSorted(nodes1, + xmlXPathNodeSetItem(nodes2, 0))); +} + +/************************************************************************ + * * + * Routines to handle extra functions * + * * + ************************************************************************/ + +/** + * xmlXPathRegisterFunc: + * @ctxt: the XPath context + * @name: the function name + * @f: the function implementation or NULL + * + * Register a new function. If @f is NULL it unregisters the function + * + * Returns 0 in case of success, -1 in case of error + */ +int +xmlXPathRegisterFunc(xmlXPathContextPtr ctxt, const xmlChar *name, + xmlXPathFunction f) { + return(xmlXPathRegisterFuncNS(ctxt, name, NULL, f)); +} + +/** + * xmlXPathRegisterFuncNS: + * @ctxt: the XPath context + * @name: the function name + * @ns_uri: the function namespace URI + * @f: the function implementation or NULL + * + * Register a new function. If @f is NULL it unregisters the function + * + * Returns 0 in case of success, -1 in case of error + */ +int +xmlXPathRegisterFuncNS(xmlXPathContextPtr ctxt, const xmlChar *name, + const xmlChar *ns_uri, xmlXPathFunction f) { + if (ctxt == NULL || name == NULL) + return(-1); + + if (ctxt->funcHash == NULL) + ctxt->funcHash = xmlHashCreate(0); + if (ctxt->funcHash == NULL) + return(-1); + + if (f == NULL) + return(xmlHashRemoveEntry2(ctxt->funcHash, name, ns_uri, NULL)); + if( xmlHashAddEntry2(ctxt->funcHash, name, ns_uri, (void *)f) < 0) + { + xmlHashFree(ctxt->funcHash, NULL); + return(-1); + } + return(0); +} + +/** + * xmlXPathRegisterFuncLookup: + * @ctxt: the XPath context + * @f: the lookup function + * @funcCtxt: the lookup data + * + * Registers an external mechanism to do function lookup. + */ +void +xmlXPathRegisterFuncLookup (xmlXPathContextPtr ctxt, + xmlXPathFuncLookupFunc f, + void *funcCtxt) { + if (ctxt == NULL) + return; + ctxt->funcLookupFunc = (void *) f; + ctxt->funcLookupData = funcCtxt; +} + +/** + * xmlXPathFunctionLookup: + * @ctxt: the XPath context + * @name: the function name + * + * Search in the Function array of the context for the given + * function. + * + * Returns the xmlXPathFunction or NULL if not found + */ +xmlXPathFunction +xmlXPathFunctionLookup(xmlXPathContextPtr ctxt, const xmlChar *name) { + if (ctxt == NULL) + return (NULL); + + if (ctxt->funcLookupFunc != NULL) { + xmlXPathFunction ret; + xmlXPathFuncLookupFunc f; + + f = (xmlXPathFuncLookupFunc) ctxt->funcLookupFunc; + ret = f(ctxt->funcLookupData, name, NULL); + if (ret != NULL) + return(ret); + } + return(xmlXPathFunctionLookupNS(ctxt, name, NULL)); +} + +/** + * xmlXPathFunctionLookupNS: + * @ctxt: the XPath context + * @name: the function name + * @ns_uri: the function namespace URI + * + * Search in the Function array of the context for the given + * function. + * + * Returns the xmlXPathFunction or NULL if not found + */ +xmlXPathFunction +xmlXPathFunctionLookupNS(xmlXPathContextPtr ctxt, const xmlChar *name, const xmlChar *ns_uri) { + if (ctxt == NULL) + return(NULL); + if (name == NULL) + return(NULL); + + if (ctxt->funcLookupFunc != NULL) { + xmlXPathFunction ret; + xmlXPathFuncLookupFunc f; + + f = (xmlXPathFuncLookupFunc) ctxt->funcLookupFunc; + ret = f(ctxt->funcLookupData, name, ns_uri); + if (ret != NULL) + return(ret); + } + + if (ctxt->funcHash == NULL) + return(NULL); + + return (xmlXPathFunction) xmlHashLookup2(ctxt->funcHash, name, ns_uri); +} + +/** + * xmlXPathRegisteredFuncsCleanup: + * @ctxt: the XPath context + * + * Cleanup the XPath context data associated to registered functions + */ +void +xmlXPathRegisteredFuncsCleanup(xmlXPathContextPtr ctxt) { + if (ctxt == NULL) + return; + + xmlHashFree(ctxt->funcHash, NULL); + ctxt->funcHash = NULL; +} + +/************************************************************************ + * * + * Routines to handle Variables * + * * + ************************************************************************/ + +/** + * xmlXPathRegisterVariable: + * @ctxt: the XPath context + * @name: the variable name + * @value: the variable value or NULL + * + * Register a new variable value. If @value is NULL it unregisters + * the variable + * + * Returns 0 in case of success, -1 in case of error + */ +int +xmlXPathRegisterVariable(xmlXPathContextPtr ctxt, const xmlChar *name, + xmlXPathObjectPtr value) { + return(xmlXPathRegisterVariableNS(ctxt, name, NULL, value)); +} + +/** + * xmlXPathRegisterVariableNS: + * @ctxt: the XPath context + * @name: the variable name + * @ns_uri: the variable namespace URI + * @value: the variable value or NULL + * + * Register a new variable value. If @value is NULL it unregisters + * the variable + * + * Returns 0 in case of success, -1 in case of error + */ +int +xmlXPathRegisterVariableNS(xmlXPathContextPtr ctxt, const xmlChar *name, + const xmlChar *ns_uri, + xmlXPathObjectPtr value) { + if (ctxt == NULL) + return(-1); + if (name == NULL) + return(-1); + + if (ctxt->varHash == NULL) + ctxt->varHash = xmlHashCreate(0); + if (ctxt->varHash == NULL) + return(-1); + if (value == NULL) + return(xmlHashRemoveEntry2(ctxt->varHash, name, ns_uri, + (xmlHashDeallocator)xmlXPathFreeObject)); + return(xmlHashUpdateEntry2(ctxt->varHash, name, ns_uri, + (void *) value, + (xmlHashDeallocator)xmlXPathFreeObject)); +} + +/** + * xmlXPathRegisterVariableLookup: + * @ctxt: the XPath context + * @f: the lookup function + * @data: the lookup data + * + * register an external mechanism to do variable lookup + */ +void +xmlXPathRegisterVariableLookup(xmlXPathContextPtr ctxt, + xmlXPathVariableLookupFunc f, void *data) { + if (ctxt == NULL) + return; + ctxt->varLookupFunc = (void *) f; + ctxt->varLookupData = data; +} + +/** + * xmlXPathVariableLookup: + * @ctxt: the XPath context + * @name: the variable name + * + * Search in the Variable array of the context for the given + * variable value. + * + * Returns a copy of the value or NULL if not found + */ +xmlXPathObjectPtr +xmlXPathVariableLookup(xmlXPathContextPtr ctxt, const xmlChar *name) { + if (ctxt == NULL) + return(NULL); + + if (ctxt->varLookupFunc != NULL) { + xmlXPathVariableLookupFunc func = (xmlXPathVariableLookupFunc)ctxt->varLookupFunc; + xmlXPathObjectPtr ret = func(ctxt->varLookupData, name, NULL); + return(ret); + } + return(xmlXPathVariableLookupNS(ctxt, name, NULL)); +} + +/** + * xmlXPathVariableLookupNS: + * @ctxt: the XPath context + * @name: the variable name + * @ns_uri: the variable namespace URI + * + * Search in the Variable array of the context for the given + * variable value. + * + * Returns the a copy of the value or NULL if not found + */ +xmlXPathObjectPtr +xmlXPathVariableLookupNS(xmlXPathContextPtr ctxt, const xmlChar *name, + const xmlChar *ns_uri) { + if (ctxt == NULL) + return(NULL); + + if (ctxt->varLookupFunc != NULL) { + xmlXPathVariableLookupFunc lookupFunc = (xmlXPathVariableLookupFunc)ctxt->varLookupFunc; + xmlXPathObjectPtr ret = lookupFunc(ctxt->varLookupData, name, ns_uri); + if (ret != NULL) + return(ret); + } + + if (ctxt->varHash == NULL) + return(NULL); + if (name == NULL) + return(NULL); + + return(xmlXPathObjectCopy((xmlXPathObjectPtr) + xmlHashLookup2(ctxt->varHash, name, ns_uri))); +} + +/** + * xmlXPathRegisteredVariablesCleanup: + * @ctxt: the XPath context + * + * Cleanup the XPath context data associated to registered variables + */ +void +xmlXPathRegisteredVariablesCleanup(xmlXPathContextPtr ctxt) { + if (ctxt == NULL) + return; + + xmlHashFree(ctxt->varHash, (xmlHashDeallocator)xmlXPathFreeObject); + ctxt->varHash = NULL; +} + +/** + * xmlXPathRegisterNs: + * @ctxt: the XPath context + * @prefix: the namespace prefix + * @ns_uri: the namespace name + * + * Register a new namespace. If @ns_uri is NULL it unregisters + * the namespace + * + * Returns 0 in case of success, -1 in case of error + */ +int +xmlXPathRegisterNs(xmlXPathContextPtr ctxt, const xmlChar *prefix, + const xmlChar *ns_uri) { + int res = -1; + xmlChar* uri = NULL; + + if (ctxt == NULL) + return(-1); + if (prefix == NULL) + return(-1); + + if (ctxt->nsHash == NULL) + ctxt->nsHash = xmlHashCreate(10); + if (ctxt->nsHash == NULL) + return(-1); + if (!ns_uri) + return(xmlHashRemoveEntry(ctxt->nsHash, prefix,(xmlHashDeallocator)xmlFree)); + uri = xmlStrdup(ns_uri); + if (uri) + { + res = xmlHashUpdateEntry(ctxt->nsHash, prefix, (void*)uri, + (xmlHashDeallocator)xmlFree); + if ( res == -1) + xmlFree( uri ); + } + return( res ); +} + +/** + * xmlXPathNsLookup: + * @ctxt: the XPath context + * @prefix: the namespace prefix value + * + * Search in the namespace declaration array of the context for the given + * namespace name associated to the given prefix + * + * Returns the value or NULL if not found + */ +const xmlChar * +xmlXPathNsLookup(xmlXPathContextPtr ctxt, const xmlChar *prefix) { + if (ctxt == NULL) + return(NULL); + if (prefix == NULL) + return(NULL); + +#ifdef XML_XML_NAMESPACE + if (xmlStrEqual(prefix, (const xmlChar *) "xml")) + return(XML_XML_NAMESPACE); +#endif + + if (ctxt->namespaces != NULL) { + int i; + + for (i = 0;i < ctxt->nsNr;i++) { + if ((ctxt->namespaces[i] != NULL) && + (xmlStrEqual(ctxt->namespaces[i]->prefix, prefix))) + return(ctxt->namespaces[i]->href); + } + } + + return((const xmlChar *) xmlHashLookup(ctxt->nsHash, prefix)); +} + +/** + * xmlXPathRegisteredNsCleanup: + * @ctxt: the XPath context + * + * Cleanup the XPath context data associated to registered variables + */ +void +xmlXPathRegisteredNsCleanup(xmlXPathContextPtr ctxt) { + if (ctxt == NULL) + return; + + xmlHashFree(ctxt->nsHash, (xmlHashDeallocator)xmlFree); + ctxt->nsHash = NULL; +} + +/************************************************************************ + * * + * Routines to handle Values * + * * + ************************************************************************/ + +/* Allocations are terrible, one needs to optimize all this !!! */ + +/** + * xmlXPathNewFloat: + * @val: the double value + * + * Create a new xmlXPathObjectPtr of type double and of value @val + * + * Returns the newly created object. + */ +xmlXPathObjectPtr +xmlXPathNewFloat(double val) { + xmlXPathObjectPtr ret; + + ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); + if (ret == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("creating float object\n")); + return(NULL); + } + memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); + ret->type = XPATH_NUMBER; + ret->floatval = val; + return(ret); +} + +/** + * xmlXPathNewBoolean: + * @val: the boolean value + * + * Create a new xmlXPathObjectPtr of type boolean and of value @val + * + * Returns the newly created object. + */ +xmlXPathObjectPtr +xmlXPathNewBoolean(int val) { + xmlXPathObjectPtr ret; + + ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); + if (ret == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("creating boolean object\n")); + return(NULL); + } + memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); + ret->type = XPATH_BOOLEAN; + ret->boolval = (val != 0); + return(ret); +} + +/** + * xmlXPathNewString: + * @val: the xmlChar * value + * + * Create a new xmlXPathObjectPtr of type string and of value @val + * + * Returns the newly created object or NULL if OOM + * + * OOM: possible --> sets OOM flag + */ +xmlXPathObjectPtr +xmlXPathNewString(const xmlChar *val) { + xmlXPathObjectPtr ret; + ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); + if (ret == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("creating string object\n")); + return(NULL); + } + memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); + ret->type = XPATH_STRING; + ret->stringval = xmlStrdup(val ? val : (const xmlChar *)""); + if( OOM_FLAG ) + { + xmlXPathFreeObject(ret); + return(NULL); + } + return(ret); +} + +/** + * xmlXPathWrapString: + * @val: the xmlChar * value + * + * Wraps the @val string into an XPath object. + * + * Returns the newly created object. + */ +xmlXPathObjectPtr +xmlXPathWrapString (xmlChar *val) { + xmlXPathObjectPtr ret; + + ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); + if (ret == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("creating string object\n")); + return(NULL); + } + memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); + ret->type = XPATH_STRING; + ret->stringval = val; + return(ret); +} + +/** + * xmlXPathNewCString: + * @val: the char * value + * + * Create a new xmlXPathObjectPtr of type string and of value @val + * + * Returns the newly created object. + */ +xmlXPathObjectPtr +xmlXPathNewCString(const char *val) { + xmlXPathObjectPtr ret; + + ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); + if (ret == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("creating string object\n")); + return(NULL); + } + memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); + ret->type = XPATH_STRING; + ret->stringval = xmlStrdup(BAD_CAST val); + if(OOM_FLAG) + { + xmlXPathFreeObject(ret); + return(NULL); + } + return(ret); +} + +/** + * xmlXPathWrapCString: + * @val: the char * value + * + * Wraps a string into an XPath object. + * + * Returns the newly created object. + */ +xmlXPathObjectPtr +xmlXPathWrapCString (char * val) { + return(xmlXPathWrapString((xmlChar *)(val))); +} + +/** + * xmlXPathWrapExternal: + * @val: the user data + * + * Wraps the @val data into an XPath object. + * + * Returns the newly created object. + */ +xmlXPathObjectPtr +xmlXPathWrapExternal (void *val) { + xmlXPathObjectPtr ret; + + ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); + if (ret == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("creating user object\n")); + return(NULL); + } + memset(ret, 0 , (size_t) sizeof(xmlXPathObject)); + ret->type = XPATH_USERS; + ret->user = val; + return(ret); +} + +/** + * xmlXPathObjectCopy: + * @val: the original object + * + * allocate a new copy of a given object + * + * Returns the newly created object or NULL if OOM + */ +xmlXPathObjectPtr +xmlXPathObjectCopy(xmlXPathObjectPtr val) { + xmlXPathObjectPtr ret; + + if (val == NULL) + return(NULL); + + ret = (xmlXPathObjectPtr) xmlMalloc(sizeof(xmlXPathObject)); + if (ret == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("copying object\n")); + return(NULL); + } + memcpy(ret, val , (size_t) sizeof(xmlXPathObject)); + switch (val->type) { + case XPATH_BOOLEAN: + case XPATH_NUMBER: + case XPATH_POINT: + case XPATH_RANGE: + break; + case XPATH_STRING: + ret->stringval = xmlStrdup(val->stringval); + if( OOM_FLAG ) + { + xmlXPathFreeObject(ret); + return(NULL); + } + break; + case XPATH_XSLT_TREE: + if ((val->nodesetval != NULL) && + (val->nodesetval->nodeTab != NULL)) { + xmlNodePtr cur, tmp; + xmlDocPtr top; + + ret->boolval = 1; + top = xmlNewDoc(NULL); + top->name = (char *) + xmlStrdup(val->nodesetval->nodeTab[0]->name); + ret->user = top; + if (top != NULL) { + top->doc = top; + cur = val->nodesetval->nodeTab[0]->children; + while (cur != NULL) { + tmp = xmlDocCopyNode(cur, top, 1); + xmlAddChild((xmlNodePtr) top, tmp); + cur = cur->next; + } + } + ret->nodesetval = xmlXPathNodeSetCreate((xmlNodePtr) top); + } else + ret->nodesetval = xmlXPathNodeSetCreate(NULL); + /* Deallocate the copied tree value */ + break; + case XPATH_NODESET: + ret->nodesetval = xmlXPathNodeSetMerge(NULL, val->nodesetval); + /* Do not deallocate the copied tree value */ + ret->boolval = 0; + break; + case XPATH_LOCATIONSET: +#ifdef LIBXML_XPTR_ENABLED + { + xmlLocationSetPtr loc = val->user; + ret->user = (void *) xmlXPtrLocationSetMerge(NULL, loc); + break; + } +#endif + case XPATH_USERS: + ret->user = val->user; + break; + case XPATH_UNDEFINED: + xmlGenericError(xmlGenericErrorContext, + EMBED_ERRTXT("xmlXPathObjectCopy: unsupported type %d\n"), + val->type); + break; + } + return(ret); +} + +/** + * xmlXPathFreeObject: + * @obj: the object to free + * + * Free up an xmlXPathObjectPtr object. + */ +// TODO: OPTIMIZE: Some reduction of function calls is possible... +// Consider using own version of this function +void +xmlXPathFreeObject(xmlXPathObjectPtr obj) { + if (obj == NULL) return; + if ((obj->type == XPATH_NODESET) || (obj->type == XPATH_XSLT_TREE)) { + if (obj->boolval) { + if (obj->user != NULL) { + xmlXPathFreeNodeSet(obj->nodesetval); + xmlFreeNodeList((xmlNodePtr) obj->user); + } else + if (obj->nodesetval != NULL) + xmlXPathFreeValueTree(obj->nodesetval); + } else { + if (obj->nodesetval != NULL) + xmlXPathFreeNodeSet(obj->nodesetval); + } +#ifdef LIBXML_XPTR_ENABLED + } else if (obj->type == XPATH_LOCATIONSET) { + if (obj->user != NULL) + xmlXPtrFreeLocationSet(obj->user); +#endif + } else if (obj->type == XPATH_STRING) { + if (obj->stringval != NULL) + xmlFree(obj->stringval); + } + + xmlFree(obj); +} + + +/************************************************************************ + * * + * Type Casting Routines * + * * + ************************************************************************/ + +/** + * xmlXPathCastBooleanToString: + * @val: a boolean + * + * Converts a boolean to its string value. + * + * Returns a newly allocated string. + */ +xmlChar * +xmlXPathCastBooleanToString (int val) { + xmlChar *ret; + if (val) + ret = xmlStrdup((const xmlChar*) "true"); + else + ret = xmlStrdup((const xmlChar*) "false"); + return(ret); +} + +/** + * xmlXPathCastNumberToString: + * @val: a number + * + * Converts a number to its string value. + * + * Returns a newly allocated string. + * + * OOM: possible --> returns NULL, OOM flag is set + */ +xmlChar* +xmlXPathCastNumberToString (double val) { + xmlChar *ret; + switch (xmlXPathIsInf(val)) { + case 1: + ret = xmlStrdup((const xmlChar*) "Infinity"); + break; + case -1: + ret = xmlStrdup((const xmlChar*) "-Infinity"); + break; + default: + if (xmlXPathIsNaN(val)) { + ret = xmlStrdup((const xmlChar*) "NaN"); + } else if (val == 0 && xmlXPathGetSign(val) != 0) { + ret = xmlStrdup((const xmlChar*) "0"); + } else { + /* TODO: could be improved */ + char buf[100]; + xmlXPathFormatNumber(val, buf, 100); + ret = xmlStrdup((const xmlChar *) buf); + } + } + return(ret); +} + +/** + * xmlXPathCastNodeToString: + * @node: a node + * + * Converts a node to its string value. + * + * Returns a newly allocated string. + * + * OOM: possible --> returns NULL; OOM flag must be checked ALWAYS + */ +xmlChar* +xmlXPathCastNodeToString (xmlNodePtr node) { + return(xmlNodeGetContent(node)); +} // TODO: OPTIMIZE: define this as macro + +/** + * xmlXPathCastNodeSetToString: + * @ns: a node-set + * + * Converts a node-set to its string value. + * + * Returns a newly allocated string. + * + * OOM: possible --> returns NULL, OOM flag is set + */ +xmlChar * +xmlXPathCastNodeSetToString (xmlNodeSetPtr ns) { + if ((ns == NULL) || (ns->nodeNr == 0) || (ns->nodeTab == NULL)) + return(xmlStrdup((const xmlChar *) "")); + + xmlXPathNodeSetSort(ns); + return(xmlXPathCastNodeToString(ns->nodeTab[0])); +} + +/** + * xmlXPathCastToString: + * @val: an XPath object + * + * Converts an existing object to its string() equivalent + * + * Returns the string value of the object, NULL in case of error. + * A new string is allocated only if needed (@val isn't a + * string object). + */ +xmlChar * +xmlXPathCastToString(xmlXPathObjectPtr val) { + xmlChar *ret = NULL; + + if (val == NULL) + return(xmlStrdup((const xmlChar *) "")); + + switch (val->type) { + case XPATH_UNDEFINED: +#ifdef DEBUG_EXPR + xmlGenericError(xmlGenericErrorContext, "String: undefined\n"); +#endif + ret = xmlStrdup((const xmlChar *) ""); + break; + case XPATH_NUMBER: + ret = xmlXPathCastNumberToString(val->floatval); + break; + + case XPATH_NODESET: + case XPATH_XSLT_TREE: + ret = xmlXPathCastNodeSetToString(val->nodesetval); + break; + + case XPATH_BOOLEAN: + ret = xmlXPathCastBooleanToString(val->boolval); + break; + + case XPATH_STRING: + return(xmlStrdup(val->stringval)); + + case XPATH_USERS: + case XPATH_POINT: + case XPATH_RANGE: + case XPATH_LOCATIONSET: + // TODO + ret = xmlStrdup((const xmlChar *) ""); + break; + } + return(ret); +} + +/** + * xmlXPathConvertString: + * @val: an XPath object + * + * Converts an existing object to its string() equivalent + * + * Returns the new object, the old one is freed (or the operation + * is done directly on @val) or NULL if OOM + */ +xmlXPathObjectPtr +xmlXPathConvertString(xmlXPathObjectPtr val) { + xmlChar *res = NULL; + xmlXPathObjectPtr ret; + + if (val == NULL) + return(xmlXPathNewCString("")); + + switch (val->type) { + case XPATH_UNDEFINED: +#ifdef DEBUG_EXPR + xmlGenericError(xmlGenericErrorContext, "STRING: undefined\n"); +#endif + break; + case XPATH_NODESET: + case XPATH_XSLT_TREE: + res = xmlXPathCastNodeSetToString(val->nodesetval); + break; + case XPATH_STRING: + return(val); + case XPATH_BOOLEAN: + res = xmlXPathCastBooleanToString(val->boolval); + break; + case XPATH_NUMBER: + res = xmlXPathCastNumberToString(val->floatval); + break; + case XPATH_USERS: + case XPATH_POINT: + case XPATH_RANGE: + case XPATH_LOCATIONSET: + TODO; + break; + } + xmlXPathFreeObject(val); + if(OOM_FLAG) return(NULL); + if (res == NULL) + return(xmlXPathNewCString("")); + ret = xmlXPathWrapString(res); + if(OOM_FLAG) + { + xmlFree(res); + return(NULL); + } + return(ret); +} + +/** + * xmlXPathCastBooleanToNumber: + * @val: a boolean + * + * Converts a boolean to its number value + * + * Returns the number value + */ +double +xmlXPathCastBooleanToNumber(int val) { + return val ? (1.0) :(0.0); +} + +/** + * xmlXPathCastStringToNumber: + * @val: a string + * + * Converts a string to its number value + * + * Returns the number value + * + * OOM: Never + */ +double +xmlXPathCastStringToNumber(const xmlChar * val) { + return(xmlXPathStringEvalNumber(val)); +} + +/** + * xmlXPathCastNodeToNumber: + * @node: a node + * + * Converts a node to its number value + * + * Returns the number value + */ +double +xmlXPathCastNodeToNumber (xmlNodePtr node) { + xmlChar *strval; + double ret; + + if (node == NULL) + return(xmlXPathNAN); + strval = xmlXPathCastNodeToString(node); + if (strval == NULL) + return(xmlXPathNAN); + + ret = xmlXPathCastStringToNumber(strval); + xmlFree(strval); + + return(ret); +} + +/** + * xmlXPathCastNodeSetToNumber: + * @ns: a node-set + * + * Converts a node-set to its number value + * + * Returns the number value + * + * OOM: possible --> OOM flag must be checked + */ +double +xmlXPathCastNodeSetToNumber (xmlNodeSetPtr ns) { + xmlChar *str; + double ret; + + if (ns == NULL) + return(xmlXPathNAN); + str = xmlXPathCastNodeSetToString(ns); // OOM is possible + if(str){ + ret = xmlXPathCastStringToNumber(str); + xmlFree(str); + return(ret); + } + return 0; +} + +/** + * xmlXPathCastToNumber: + * @val: an XPath object + * + * Converts an XPath object to its number value + * + * Returns the number value + */ +double +xmlXPathCastToNumber(xmlXPathObjectPtr val) { + double ret = 0.0; + + if (val == NULL) + return(xmlXPathNAN); + switch (val->type) { + case XPATH_UNDEFINED: +#ifdef DEGUB_EXPR + xmlGenericError(xmlGenericErrorContext, "NUMBER: undefined\n"); +#endif + ret = xmlXPathNAN; + break; + case XPATH_NODESET: + case XPATH_XSLT_TREE: + ret = xmlXPathCastNodeSetToNumber(val->nodesetval); + break; + case XPATH_STRING: + ret = xmlXPathCastStringToNumber(val->stringval); + break; + case XPATH_NUMBER: + ret = val->floatval; + break; + case XPATH_BOOLEAN: + ret = xmlXPathCastBooleanToNumber(val->boolval); + break; + case XPATH_USERS: + case XPATH_POINT: + case XPATH_RANGE: + case XPATH_LOCATIONSET: + TODO; + ret = xmlXPathNAN; + break; + } + return(ret); +} + +/** + * xmlXPathConvertNumber: + * @val: an XPath object + * + * Converts an existing object to its number() equivalent + * + * Returns the new object, the old one is freed (or the operation + * is done directly on @val) + */ +xmlXPathObjectPtr +xmlXPathConvertNumber(xmlXPathObjectPtr val) { + xmlXPathObjectPtr ret; + + if (val == NULL) + return(xmlXPathNewFloat(0.0)); + if (val->type == XPATH_NUMBER) + return(val); + ret = xmlXPathNewFloat(xmlXPathCastToNumber(val)); + xmlXPathFreeObject(val); + return(ret); +} + +/** + * xmlXPathCastNumberToBoolean: + * @val: a number + * + * Converts a number to its boolean value + * + * Returns the boolean value + */ +int +xmlXPathCastNumberToBoolean (double val) { + if (xmlXPathIsNaN(val) || (val == 0.0)) + return(0); + return(1); +} + +/** + * xmlXPathCastStringToBoolean: + * @val: a string + * + * Converts a string to its boolean value + * + * Returns the boolean value + * + * OOM: never + */ +int +xmlXPathCastStringToBoolean (const xmlChar *val) { + if ((val == NULL) || (xmlStrlen(val) == 0)) + return(0); + return(1); +} + +/** + * xmlXPathCastNodeSetToBoolean: + * @ns: a node-set + * + * Converts a node-set to its boolean value + * + * Returns the boolean value + * + * OOM: never + */ +int +xmlXPathCastNodeSetToBoolean (xmlNodeSetPtr ns) { + if ((ns == NULL) || (ns->nodeNr == 0)) + return(0); + return(1); +} + +/** + * xmlXPathCastToBoolean: + * @val: an XPath object + * + * Converts an XPath object to its boolean value + * + * Returns the boolean value + */ +int +xmlXPathCastToBoolean (xmlXPathObjectPtr val) { + int ret = 0; + + if (val == NULL) + return(0); + switch (val->type) { + case XPATH_UNDEFINED: +#ifdef DEBUG_EXPR + xmlGenericError(xmlGenericErrorContext, "BOOLEAN: undefined\n"); +#endif + ret = 0; + break; + case XPATH_NODESET: + case XPATH_XSLT_TREE: + ret = xmlXPathCastNodeSetToBoolean(val->nodesetval); + break; + case XPATH_STRING: + ret = xmlXPathCastStringToBoolean(val->stringval); + break; + case XPATH_NUMBER: + ret = xmlXPathCastNumberToBoolean(val->floatval); + break; + case XPATH_BOOLEAN: + ret = val->boolval; + break; + case XPATH_USERS: + case XPATH_POINT: + case XPATH_RANGE: + case XPATH_LOCATIONSET: + TODO; + ret = 0; + break; + } + return(ret); +} + + +/** + * xmlXPathConvertBoolean: + * @val: an XPath object + * + * Converts an existing object to its boolean() equivalent + * + * Returns the new object, the old one is freed (or the operation + * is done directly on @val) + */ +xmlXPathObjectPtr +xmlXPathConvertBoolean(xmlXPathObjectPtr val) { + xmlXPathObjectPtr ret; + + if (val == NULL) + return(xmlXPathNewBoolean(0)); + if (val->type == XPATH_BOOLEAN) + return(val); + ret = xmlXPathNewBoolean(xmlXPathCastToBoolean(val)); + xmlXPathFreeObject(val); + return(ret); +} + +/************************************************************************ + * * + * Routines to handle XPath contexts * + * * + ************************************************************************/ + +#ifdef XMLENGINE_XPATH_FUNC_HASH_OPTIMIZED +/** + * xmlHashCopier: + * typedef void *(*xmlHashCopier)(void *payload, xmlChar *name); + */ +void* xeSimpleHashEntryCopier(void *payload, xmlChar* name ) +{ + return payload; // just return the same value +} +#endif + +/** + * xmlXPathNewContext: + * @doc: the XML document + * + * Create a new xmlXPathContext + * + * Returns the xmlXPathContext just allocated. The caller will need to free it. + */ +xmlXPathContextPtr +xmlXPathNewContext(xmlDocPtr doc) { + xmlXPathContextPtr ret; + xmlHashTablePtr gFuncHash; + + ret = (xmlXPathContextPtr) xmlMalloc(sizeof(xmlXPathContext)); + if (ret == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("creating context\n")); + return(NULL); + } + memset(ret, 0 , (size_t) sizeof(xmlXPathContext)); + + ret->doc = doc; // this is a context node in general, not always a document node + + // XMLENGINE: these are nullified already + //ret->node = NULL; + //ret->varHash = NULL; + //ret->nb_types = 0; + //ret->max_types = 0; + //ret->types = NULL; + +#ifdef XMLENGINE_XPATH_FUNC_HASH_OPTIMIZED +// XMLENGINE: BEGIN NEW CODE + // xmlXPathDefaultFunctionsHash is the new field in xmlGlobalState structure + gFuncHash = xmlXPathDefaultFunctionsHash; + if(!gFuncHash) + { // global reusable hash table was not initialized yet + if( xmlXPathRegisterAllFunctions(ret) < 0 ) + { + xmlFree(ret); + return(NULL); + } + if(xmlXPathDefineExtensionFunctionsGlobally) + { + xmlXPathDefaultFunctionsHash = ret->funcHash; + } + else + { + xmlXPathDefaultFunctionsHash = xmlHashCopy(ret->funcHash, xeSimpleHashEntryCopier); + } + } + else + { // copy previously initialized hash table OR + // reuse the global hash, then, no cleanup is needed when + // XPath context is freed + if(xmlXPathDefineExtensionFunctionsGlobally) + { + ret->funcHash = gFuncHash; + } + else + { + ret->funcHash = xmlHashCopy( gFuncHash, xeSimpleHashEntryCopier ); + } + } +// XMLENGINE: END NEW CODE +#else + /* original code*/ + ret->funcHash = xmlHashCreate(0); + xmlXPathRegisterAllFunctions(ret); //TODO: check OOM +#endif /* else !XMLENGINE_XPATH_FUNC_HASH_OPTIMIZED */ + + // XMLENGINE: these are nullified already + //ret->nb_axis = 0; + //ret->max_axis = 0; + //ret->axis = NULL; + //ret->nsHash = NULL; + //ret->user = NULL; + + ret->contextSize = -1; + ret->proximityPosition = -1; + + return(ret); +} + +/** + * xmlXPathFreeContext: + * @ctxt: the context to free + * + * Free up an xmlXPathContext + */ +void +xmlXPathFreeContext(xmlXPathContextPtr ctxt) { + // TODO: Check will this erase useful error info during ERR cleanup + // merge: i'm not sure if this is useful anymore... + if (&ctxt->lastError) + xmlResetError(&ctxt->lastError); + + xmlXPathRegisteredNsCleanup(ctxt); +#ifdef XMLENGINE_XPATH_FUNC_HASH_OPTIMIZED + // DO NOTHING HERE if global hash table is reused. + // The function hash is destroyed only if it is not reused, + // otherwise the reference to it is stored in global: + // xmlXPathDefaultFunctionsHash variable + // and the hash table is freed during XML Engine cleanup with + // xeXPathCleanup() + if(!xmlXPathDefineExtensionFunctionsGlobally) + { + xmlXPathRegisteredFuncsCleanup(ctxt); + } +#else + xmlXPathRegisteredFuncsCleanup(ctxt); +#endif + xmlXPathRegisteredVariablesCleanup(ctxt); + xmlFree(ctxt); +} + +/************************************************************************ + * * + * Routines to handle XPath parser contexts * + * * + ************************************************************************/ + +#define CHECK_CTXT(ctxt) \ + if (ctxt == NULL) { \ + xmlGenericError(xmlGenericErrorContext, \ + EMBED_ERRTXT("%s:%d Internal error: ctxt == NULL\n"), \ + __FILE__, __LINE__); \ + } \ + + +// TODO: Quite big macro -- for release build it could be reduced by xmlGenericError calls +#define CHECK_CONTEXT(ctxt) \ + if (ctxt == NULL) { \ + xmlGenericError(xmlGenericErrorContext, \ + EMBED_ERRTXT("%s:%d Internal error: no context\n"), \ + __FILE__, __LINE__); \ + } \ + else if (ctxt->doc == NULL) { \ + xmlGenericError(xmlGenericErrorContext, \ + EMBED_ERRTXT("%s:%d Internal error: no document\n"), \ + __FILE__, __LINE__); \ + } \ + else if (ctxt->doc->children == NULL) { \ + xmlGenericError(xmlGenericErrorContext, \ + EMBED_ERRTXT("%s:%d Internal error: document without root\n"), \ + __FILE__, __LINE__); \ + } \ + + +/** + * xmlXPathNewParserContext: + * @str: the XPath expression + * @ctxt: the XPath context + * + * Create a new xmlXPathParserContext + * + * Returns the xmlXPathParserContext just allocated. + */ +xmlXPathParserContextPtr +xmlXPathNewParserContext(const xmlChar *str, xmlXPathContextPtr ctxt) { + xmlXPathParserContextPtr ret; + + ret = (xmlXPathParserContextPtr) xmlMalloc(sizeof(xmlXPathParserContext)); + if (ret == NULL) { + xmlXPathErrMemory(ctxt, EMBED_ERRTXT("creating parser context\n")); + return(NULL); + } + memset(ret, 0 , (size_t) sizeof(xmlXPathParserContext)); + ret->cur = ret->base = str; + ret->context = ctxt; + + ret->comp = xmlXPathNewCompExpr(); + if (ret->comp == NULL) { + xmlFree(ret->valueTab); + xmlFree(ret); + return(NULL); + } + if ((ctxt != NULL) && (ctxt->dict != NULL)) { + ret->comp->dict = ctxt->dict; + xmlDictReference(ret->comp->dict); + } + + return(ret); +} + +/** + * xmlXPathCompParserContext: + * @comp: the XPath compiled expression + * @ctxt: the XPath context + * + * Create a new xmlXPathParserContext when processing a compiled expression + * + * Returns the xmlXPathParserContext just allocated. + */ +static xmlXPathParserContextPtr +xmlXPathCompParserContext(xmlXPathCompExprPtr comp, xmlXPathContextPtr ctxt) { + xmlXPathParserContextPtr ret; + + ret = (xmlXPathParserContextPtr) xmlMalloc(sizeof(xmlXPathParserContext)); + if (ret == NULL) { + xmlXPathErrMemory(ctxt, EMBED_ERRTXT("creating evaluation context\n")); + return(NULL); + } + memset(ret, 0 , (size_t) sizeof(xmlXPathParserContext)); + + /* Allocate the value stack */ + ret->valueTab = (xmlXPathObjectPtr *) + xmlMalloc(10 * sizeof(xmlXPathObjectPtr)); + if (ret->valueTab == NULL) { + xmlFree(ret); + xmlXPathErrMemory(ctxt, EMBED_ERRTXT("creating evaluation context\n")); + return(NULL); + } + ret->valueNr = 0; + ret->valueMax = 10; + ret->value = NULL; + + ret->context = ctxt; + ret->comp = comp; + + return(ret); +} + +/** + * xmlXPathFreeParserContext: + * @ctxt: the context to free + * + * Free up an xmlXPathParserContext + */ +void +xmlXPathFreeParserContext(xmlXPathParserContextPtr ctxt) { + if (ctxt->valueTab != NULL) { + xmlFree(ctxt->valueTab); + } + if (ctxt->comp) + xmlXPathFreeCompExpr(ctxt->comp); + xmlFree(ctxt); +} + +/************************************************************************ + * * + * The implicit core function library * + * * + ************************************************************************/ + +/** + * xmlXPathNodeValHash: + * @node: a node pointer + * + * Function computing the beginning of the string value of the node, + * used to speed up comparisons + * + * Returns an int usable as a hash + */ +static unsigned int +xmlXPathNodeValHash(xmlNodePtr node) { + int len = 2; + const xmlChar * string = NULL; + xmlNodePtr tmp = NULL; + unsigned int ret = 0; + + if (node == NULL) + return(0); + + if (node->type == XML_DOCUMENT_NODE) { + tmp = xmlDocGetRootElement((xmlDocPtr) node); + if (tmp == NULL) + node = node->children; + else + node = tmp; + + if (node == NULL) + return(0); + } + + switch (node->type) { + case XML_COMMENT_NODE: + case XML_PI_NODE: + case XML_CDATA_SECTION_NODE: + case XML_TEXT_NODE: + string = node->content; + if (string == NULL) + return(0); + if (string[0] == 0) + return(0); + return(((unsigned int) string[0]) + + (((unsigned int) string[1]) << 8)); + case XML_NAMESPACE_DECL: + string = ((xmlNsPtr)node)->href; + if (string == NULL) + return(0); + if (string[0] == 0) + return(0); + return(((unsigned int) string[0]) + + (((unsigned int) string[1]) << 8)); + case XML_ATTRIBUTE_NODE: + tmp = ((xmlAttrPtr) node)->children; + break; + case XML_ELEMENT_NODE: + tmp = node->children; + break; + default: + return(0); + } + while (tmp != NULL) { + switch (tmp->type) { + case XML_COMMENT_NODE: + case XML_PI_NODE: + case XML_CDATA_SECTION_NODE: + case XML_TEXT_NODE: + string = tmp->content; + break; + case XML_NAMESPACE_DECL: + string = ((xmlNsPtr)tmp)->href; + break; + default: + break; + } + if ((string != NULL) && (string[0] != 0)) { + if (len == 1) { + return(ret + (((unsigned int) string[0]) << 8)); + } + if (string[1] == 0) { + len = 1; + ret = (unsigned int) string[0]; + } else { + return(((unsigned int) string[0]) + + (((unsigned int) string[1]) << 8)); + } + } + /* + * Skip to next node + */ + if ((tmp->children != NULL) && (tmp->type != XML_DTD_NODE)) { + if (tmp->children->type != XML_ENTITY_DECL) { + tmp = tmp->children; + continue; + } + } + if (tmp == node) + break; + + if (tmp->next != NULL) { + tmp = tmp->next; + continue; + } + + do { + tmp = tmp->parent; + if (tmp == NULL) + break; + if (tmp == node) { + tmp = NULL; + break; + } + if (tmp->next != NULL) { + tmp = tmp->next; + break; + } + } while (tmp != NULL); + } + return(ret); +} + +/** + * xmlXPathStringHash: + * @string: a string + * + * Function computing the beginning of the string value of the node, + * used to speed up comparisons + * + * Returns an int usable as a hash + */ +static unsigned int +xmlXPathStringHash(const xmlChar * string) { + if (string == NULL) + return((unsigned int) 0); + if (string[0] == 0) + return(0); + return(((unsigned int) string[0]) + + (((unsigned int) string[1]) << 8)); +} + +/** + * xmlXPathCompareNodeSetFloat: + * @ctxt: the XPath Parser context + * @inf: less than (1) or greater than (0) + * @strict: is the comparison strict + * @arg: the node set + * @f: the value + * + * Implement the compare operation between a nodeset and a number + * @ns < @val (1, 1, ... + * @ns <= @val (1, 0, ... + * @ns > @val (0, 1, ... + * @ns >= @val (0, 0, ... + * + * If one object to be compared is a node-set and the other is a number, + * then the comparison will be true if and only if there is a node in the + * node-set such that the result of performing the comparison on the number + * to be compared and on the result of converting the string-value of that + * node to a number using the number function is true. + * + * Returns 0 or 1 depending on the results of the test. + */ +static int +xmlXPathCompareNodeSetFloat(xmlXPathParserContextPtr ctxt, int inf, int strict, + xmlXPathObjectPtr arg, xmlXPathObjectPtr f) { + int i, ret = 0; + xmlNodeSetPtr ns; + xmlChar *str2; + + if ((f == NULL) || (arg == NULL) || + ((arg->type != XPATH_NODESET) && (arg->type != XPATH_XSLT_TREE))) { + xmlXPathFreeObject(arg); + xmlXPathFreeObject(f); + return(0); + } + ns = arg->nodesetval; + if (ns != NULL) { + for (i = 0;i < ns->nodeNr;i++) { + str2 = xmlXPathCastNodeToString(ns->nodeTab[i]); + if (str2 != NULL) { + valuePush(ctxt, + xmlXPathNewString(str2)); + xmlFree(str2); + xmlXPathNumberFunction(ctxt, 1); + valuePush(ctxt, xmlXPathObjectCopy(f)); + ret = xmlXPathCompareValues(ctxt, inf, strict); + if (ret) + break; + } + } + } + xmlXPathFreeObject(arg); + xmlXPathFreeObject(f); + return(ret); +} + +/** + * xmlXPathCompareNodeSetString: + * @ctxt: the XPath Parser context + * @inf: less than (1) or greater than (0) + * @strict: is the comparison strict + * @arg: the node set + * @s: the value + * + * Implement the compare operation between a nodeset and a string + * @ns < @val (1, 1, ... + * @ns <= @val (1, 0, ... + * @ns > @val (0, 1, ... + * @ns >= @val (0, 0, ... + * + * If one object to be compared is a node-set and the other is a string, + * then the comparison will be true if and only if there is a node in + * the node-set such that the result of performing the comparison on the + * string-value of the node and the other string is true. + * + * Returns 0 or 1 depending on the results of the test. + */ +static int +xmlXPathCompareNodeSetString(xmlXPathParserContextPtr ctxt, int inf, int strict, + xmlXPathObjectPtr arg, xmlXPathObjectPtr s) { + int i, ret = 0; + xmlNodeSetPtr ns; + xmlChar *str2; + + if ((s == NULL) || (arg == NULL) || + ((arg->type != XPATH_NODESET) && (arg->type != XPATH_XSLT_TREE))) { + xmlXPathFreeObject(arg); + xmlXPathFreeObject(s); + return(0); + } + ns = arg->nodesetval; + if (ns != NULL) { + for (i = 0;i < ns->nodeNr;i++) { + str2 = xmlXPathCastNodeToString(ns->nodeTab[i]); + if (str2 != NULL) { + valuePush(ctxt, + xmlXPathNewString(str2)); + xmlFree(str2); + valuePush(ctxt, xmlXPathObjectCopy(s)); + ret = xmlXPathCompareValues(ctxt, inf, strict); + if (ret) + break; + } + } + } + xmlXPathFreeObject(arg); + xmlXPathFreeObject(s); + return(ret); +} + +/** + * xmlXPathCompareNodeSets: + * @inf: less than (1) or greater than (0) + * @strict: is the comparison strict + * @arg1: the first node set object + * @arg2: the second node set object + * + * Implement the compare operation on nodesets: + * + * If both objects to be compared are node-sets, then the comparison + * will be true if and only if there is a node in the first node-set + * and a node in the second node-set such that the result of performing + * the comparison on the string-values of the two nodes is true. + * .... + * When neither object to be compared is a node-set and the operator + * is <=, <, >= or >, then the objects are compared by converting both + * objects to numbers and comparing the numbers according to IEEE 754. + * .... + * The number function converts its argument to a number as follows: + * - a string that consists of optional whitespace followed by an + * optional minus sign followed by a Number followed by whitespace + * is converted to the IEEE 754 number that is nearest (according + * to the IEEE 754 round-to-nearest rule) to the mathematical value + * represented by the string; any other string is converted to NaN + * + * Conclusion all nodes need to be converted first to their string value + * and then the comparison must be done when possible + */ +static int +xmlXPathCompareNodeSets(int inf, int strict, + xmlXPathObjectPtr arg1, xmlXPathObjectPtr arg2) { + int i, j, init = 0; + double val1; + double *values2; + int ret = 0; + xmlNodeSetPtr ns1; + xmlNodeSetPtr ns2; + + if ((arg1 == NULL) || + ((arg1->type != XPATH_NODESET) && (arg1->type != XPATH_XSLT_TREE))) { + xmlXPathFreeObject(arg2); + return(0); + } + if ((arg2 == NULL) || + ((arg2->type != XPATH_NODESET) && (arg2->type != XPATH_XSLT_TREE))) { + xmlXPathFreeObject(arg1); + xmlXPathFreeObject(arg2); + return(0); + } + + ns1 = arg1->nodesetval; + ns2 = arg2->nodesetval; + + if ((ns1 == NULL) || (ns1->nodeNr <= 0)) { + xmlXPathFreeObject(arg1); + xmlXPathFreeObject(arg2); + return(0); + } + if ((ns2 == NULL) || (ns2->nodeNr <= 0)) { + xmlXPathFreeObject(arg1); + xmlXPathFreeObject(arg2); + return(0); + } + + values2 = (double *) xmlMalloc(ns2->nodeNr * sizeof(double)); + if (values2 == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("comparing nodesets\n")); + xmlXPathFreeObject(arg1); + xmlXPathFreeObject(arg2); + return(0); + } + for (i = 0;i < ns1->nodeNr;i++) { + val1 = xmlXPathCastNodeToNumber(ns1->nodeTab[i]); + if (xmlXPathIsNaN(val1)) + continue; + for (j = 0;j < ns2->nodeNr;j++) { + if (init == 0) { + values2[j] = xmlXPathCastNodeToNumber(ns2->nodeTab[j]); + } + if (xmlXPathIsNaN(values2[j])) + continue; + if (inf && strict) + ret = (val1 < values2[j]); + else if (inf && !strict) + ret = (val1 <= values2[j]); + else if (!inf && strict) + ret = (val1 > values2[j]); + else if (!inf && !strict) + ret = (val1 >= values2[j]); + if (ret) + break; + } + if (ret) + break; + init = 1; + } + xmlFree(values2); + xmlXPathFreeObject(arg1); + xmlXPathFreeObject(arg2); + return(ret); +} + +/** + * xmlXPathCompareNodeSetValue: + * @ctxt: the XPath Parser context + * @inf: less than (1) or greater than (0) + * @strict: is the comparison strict + * @arg: the node set + * @val: the value + * + * Implement the compare operation between a nodeset and a value + * @ns < @val (1, 1, ... + * @ns <= @val (1, 0, ... + * @ns > @val (0, 1, ... + * @ns >= @val (0, 0, ... + * + * If one object to be compared is a node-set and the other is a boolean, + * then the comparison will be true if and only if the result of performing + * the comparison on the boolean and on the result of converting + * the node-set to a boolean using the boolean function is true. + * + * Returns 0 or 1 depending on the results of the test. + */ +static int +xmlXPathCompareNodeSetValue(xmlXPathParserContextPtr ctxt, int inf, int strict, + xmlXPathObjectPtr arg, xmlXPathObjectPtr val) { + if ((val == NULL) || (arg == NULL) || + ((arg->type != XPATH_NODESET) && (arg->type != XPATH_XSLT_TREE))) + return(0); + + switch(val->type) { + case XPATH_NUMBER: + return(xmlXPathCompareNodeSetFloat(ctxt, inf, strict, arg, val)); + case XPATH_NODESET: + case XPATH_XSLT_TREE: + return(xmlXPathCompareNodeSets(inf, strict, arg, val)); + case XPATH_STRING: + return(xmlXPathCompareNodeSetString(ctxt, inf, strict, arg, val)); + case XPATH_BOOLEAN: + valuePush(ctxt, arg); + xmlXPathBooleanFunction(ctxt, 1); + valuePush(ctxt, val); + return(xmlXPathCompareValues(ctxt, inf, strict)); + default: + TODO + } + return(0); +} + +/** + * xmlXPathEqualNodeSetString: + * @arg: the nodeset object argument + * @str: the string to compare to. + * @neq: flag to show whether for '=' (0) or '!=' (1) + * + * Implement the equal operation on XPath objects content: @arg1 == @arg2 + * If one object to be compared is a node-set and the other is a string, + * then the comparison will be true if and only if there is a node in + * the node-set such that the result of performing the comparison on the + * string-value of the node and the other string is true. + * + * Returns 0 or 1 depending on the results of the test. + */ +static int +xmlXPathEqualNodeSetString(xmlXPathObjectPtr arg, const xmlChar * str, int neq) +{ + int i; + xmlNodeSetPtr ns; + xmlChar *str2; + unsigned int hash; + + if ((str == NULL) || (arg == NULL) || + ((arg->type != XPATH_NODESET) && (arg->type != XPATH_XSLT_TREE))) + return (0); + ns = arg->nodesetval; + /* + * A NULL nodeset compared with a string is always false + * (since there is no node equal, and no node not equal) + */ + if ((ns == NULL) || (ns->nodeNr <= 0) ) + return (0); + hash = xmlXPathStringHash(str); + for (i = 0; i < ns->nodeNr; i++) { + if (xmlXPathNodeValHash(ns->nodeTab[i]) == hash) { + str2 = xmlNodeGetContent(ns->nodeTab[i]); + if ((str2 != NULL) && (xmlStrEqual(str, str2))) { + xmlFree(str2); + if (neq) + continue; + return (1); + } else if ((str2 == NULL) && (xmlStrEqual(str, BAD_CAST ""))) { + if (neq) + continue; + return (1); + } else if (neq) { + if (str2 != NULL) + xmlFree(str2); + return (1); + } + if (str2 != NULL) + xmlFree(str2); + } else if (neq) + return (1); + } + return (0); +} + +/** + * xmlXPathEqualNodeSetFloat: + * @arg: the nodeset object argument + * @f: the float to compare to + * @neq: flag to show whether to compare '=' (0) or '!=' (1) + * + * Implement the equal operation on XPath objects content: @arg1 == @arg2 + * If one object to be compared is a node-set and the other is a number, + * then the comparison will be true if and only if there is a node in + * the node-set such that the result of performing the comparison on the + * number to be compared and on the result of converting the string-value + * of that node to a number using the number function is true. + * + * Returns 0 or 1 depending on the results of the test. + */ +static int +xmlXPathEqualNodeSetFloat(xmlXPathParserContextPtr ctxt, + xmlXPathObjectPtr arg, double f, int neq) { + int i, ret=0; + xmlNodeSetPtr ns; + xmlChar *str2; + xmlXPathObjectPtr val; + double v; + + if ((arg == NULL) || + ((arg->type != XPATH_NODESET) && (arg->type != XPATH_XSLT_TREE))) + return(0); + + ns = arg->nodesetval; + if (ns != NULL) { + for (i=0;inodeNr;i++) { + str2 = xmlXPathCastNodeToString(ns->nodeTab[i]); + if (str2 != NULL) { + valuePush(ctxt, xmlXPathNewString(str2)); + xmlFree(str2); + xmlXPathNumberFunction(ctxt, 1); + val = valuePop(ctxt); + v = val->floatval; + xmlXPathFreeObject(val); + if (!xmlXPathIsNaN(v)) { + if ((!neq) && (v==f)) { + ret = 1; + break; + } else if ((neq) && (v!=f)) { + ret = 1; + break; + } + } + } + } + } + + return(ret); +} + + +/** + * xmlXPathEqualNodeSets: + * @arg1: first nodeset object argument + * @arg2: second nodeset object argument + * @neq: flag to show whether to test '=' (0) or '!=' (1) + * + * Implement the equal / not equal operation on XPath nodesets: + * @arg1 == @arg2 or @arg1 != @arg2 + * If both objects to be compared are node-sets, then the comparison + * will be true if and only if there is a node in the first node-set and + * a node in the second node-set such that the result of performing the + * comparison on the string-values of the two nodes is true. + * + * (needless to say, this is a costly operation) + * + * Returns 0 or 1 depending on the results of the test. + */ +static int +xmlXPathEqualNodeSets(xmlXPathObjectPtr arg1, xmlXPathObjectPtr arg2, int neq) { + int i, j; + unsigned int *hashs1; + unsigned int *hashs2; + xmlChar **values1; + xmlChar **values2; + int ret = 0; + xmlNodeSetPtr ns1; + xmlNodeSetPtr ns2; + + if ((arg1 == NULL) || + ((arg1->type != XPATH_NODESET) && (arg1->type != XPATH_XSLT_TREE))) + return(0); + if ((arg2 == NULL) || + ((arg2->type != XPATH_NODESET) && (arg2->type != XPATH_XSLT_TREE))) + return(0); + + ns1 = arg1->nodesetval; + ns2 = arg2->nodesetval; + + if ((ns1 == NULL) || (ns1->nodeNr <= 0)) + return(0); + if ((ns2 == NULL) || (ns2->nodeNr <= 0)) + return(0); + + /* + * for equal, check if there is a node pertaining to both sets + */ + if (neq == 0) + for (i = 0;i < ns1->nodeNr;i++) + for (j = 0;j < ns2->nodeNr;j++) + if (ns1->nodeTab[i] == ns2->nodeTab[j]) + return(1); + + values1 = (xmlChar **) xmlMalloc(ns1->nodeNr * sizeof(xmlChar *)); + if (values1 == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("comparing nodesets\n")); + return(0); + } + hashs1 = (unsigned int *) xmlMalloc(ns1->nodeNr * sizeof(unsigned int)); + if (hashs1 == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("comparing nodesets\n")); + xmlFree(values1); + return(0); + } + memset(values1, 0, ns1->nodeNr * sizeof(xmlChar *)); + values2 = (xmlChar **) xmlMalloc(ns2->nodeNr * sizeof(xmlChar *)); + if (values2 == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("comparing nodesets\n")); + xmlFree(hashs1); + xmlFree(values1); + return(0); + } + hashs2 = (unsigned int *) xmlMalloc(ns2->nodeNr * sizeof(unsigned int)); + if (hashs2 == NULL) { + xmlXPathErrMemory(NULL, EMBED_ERRTXT("comparing nodesets\n")); + xmlFree(hashs1); + xmlFree(values1); + xmlFree(values2); + return(0); + } + memset(values2, 0, ns2->nodeNr * sizeof(xmlChar *)); + for (i = 0;i < ns1->nodeNr;i++) { + hashs1[i] = xmlXPathNodeValHash(ns1->nodeTab[i]); + for (j = 0;j < ns2->nodeNr;j++) { + if (i == 0) + hashs2[j] = xmlXPathNodeValHash(ns2->nodeTab[j]); + if (hashs1[i] != hashs2[j]) { + if (neq) { + ret = 1; + break; + } + } + else { + if (values1[i] == NULL) + values1[i] = xmlNodeGetContent(ns1->nodeTab[i]); + if (values2[j] == NULL) + values2[j] = xmlNodeGetContent(ns2->nodeTab[j]); + ret = xmlStrEqual(values1[i], values2[j]) ^ neq; + if (ret) + break; + } + } + if (ret) + break; + } + for (i = 0;i < ns1->nodeNr;i++) + if (values1[i] != NULL) + xmlFree(values1[i]); + for (j = 0;j < ns2->nodeNr;j++) + if (values2[j] != NULL) + xmlFree(values2[j]); + xmlFree(values1); + xmlFree(values2); + xmlFree(hashs1); + xmlFree(hashs2); + return(ret); +} + +static int +xmlXPathEqualValuesCommon(xmlXPathParserContextPtr ctxt, + xmlXPathObjectPtr arg1, xmlXPathObjectPtr arg2) { + int ret = 0; + /* + *At this point we are assured neither arg1 nor arg2 + *is a nodeset, so we can just pick the appropriate routine. + */ + switch (arg1->type) { + case XPATH_UNDEFINED: +#ifdef DEBUG_EXPR + xmlGenericError(xmlGenericErrorContext, + "Equal: undefined\n"); +#endif + break; + case XPATH_BOOLEAN: + switch (arg2->type) { + case XPATH_UNDEFINED: +#ifdef DEBUG_EXPR + xmlGenericError(xmlGenericErrorContext, + "Equal: undefined\n"); +#endif + break; + case XPATH_BOOLEAN: +#ifdef DEBUG_EXPR + xmlGenericError(xmlGenericErrorContext, + "Equal: %d boolean %d \n", + arg1->boolval, arg2->boolval); +#endif + ret = (arg1->boolval == arg2->boolval); + break; + case XPATH_NUMBER: + ret = (arg1->boolval == + xmlXPathCastNumberToBoolean(arg2->floatval)); + break; + case XPATH_STRING: + if ((arg2->stringval == NULL) || + (arg2->stringval[0] == 0)) ret = 0; + else + ret = 1; + ret = (arg1->boolval == ret); + break; + case XPATH_USERS: + case XPATH_POINT: + case XPATH_RANGE: + case XPATH_LOCATIONSET: + TODO + break; + case XPATH_NODESET: + case XPATH_XSLT_TREE: + break; + } + break; + case XPATH_NUMBER: + switch (arg2->type) { + case XPATH_UNDEFINED: +#ifdef DEBUG_EXPR + xmlGenericError(xmlGenericErrorContext, + "Equal: undefined\n"); +#endif + break; + case XPATH_BOOLEAN: + ret = (arg2->boolval== + xmlXPathCastNumberToBoolean(arg1->floatval)); + break; + case XPATH_STRING: + valuePush(ctxt, arg2); + xmlXPathNumberFunction(ctxt, 1); + arg2 = valuePop(ctxt); + /* no break on purpose */ + case XPATH_NUMBER: + /* Hand check NaN and Infinity equalities */ + if (xmlXPathIsNaN(arg1->floatval) || + xmlXPathIsNaN(arg2->floatval)) { + ret = 0; + } else if (xmlXPathIsInf(arg1->floatval) == 1) { + if (xmlXPathIsInf(arg2->floatval) == 1) + ret = 1; + else + ret = 0; + } else if (xmlXPathIsInf(arg1->floatval) == -1) { + if (xmlXPathIsInf(arg2->floatval) == -1) + ret = 1; + else + ret = 0; + } else if (xmlXPathIsInf(arg2->floatval) == 1) { + if (xmlXPathIsInf(arg1->floatval) == 1) + ret = 1; + else + ret = 0; + } else if (xmlXPathIsInf(arg2->floatval) == -1) { + if (xmlXPathIsInf(arg1->floatval) == -1) + ret = 1; + else + ret = 0; + } else { + ret = (arg1->floatval == arg2->floatval); + } + break; + case XPATH_USERS: + case XPATH_POINT: + case XPATH_RANGE: + case XPATH_LOCATIONSET: + TODO + break; + case XPATH_NODESET: + case XPATH_XSLT_TREE: + break; + } + break; + case XPATH_STRING: + switch (arg2->type) { + case XPATH_UNDEFINED: +#ifdef DEBUG_EXPR + xmlGenericError(xmlGenericErrorContext, + "Equal: undefined\n"); +#endif + break; + case XPATH_BOOLEAN: + if ((arg1->stringval == NULL) || + (arg1->stringval[0] == 0)) ret = 0; + else + ret = 1; + ret = (arg2->boolval == ret); + break; + case XPATH_STRING: + ret = xmlStrEqual(arg1->stringval, arg2->stringval); + break; + case XPATH_NUMBER: + valuePush(ctxt, arg1); + xmlXPathNumberFunction(ctxt, 1); + arg1 = valuePop(ctxt); + /* Hand check NaN and Infinity equalities */ + if (xmlXPathIsNaN(arg1->floatval) || + xmlXPathIsNaN(arg2->floatval)) { + ret = 0; + } else if (xmlXPathIsInf(arg1->floatval) == 1) { + if (xmlXPathIsInf(arg2->floatval) == 1) + ret = 1; + else + ret = 0; + } else if (xmlXPathIsInf(arg1->floatval) == -1) { + if (xmlXPathIsInf(arg2->floatval) == -1) + ret = 1; + else + ret = 0; + } else if (xmlXPathIsInf(arg2->floatval) == 1) { + if (xmlXPathIsInf(arg1->floatval) == 1) + ret = 1; + else + ret = 0; + } else if (xmlXPathIsInf(arg2->floatval) == -1) { + if (xmlXPathIsInf(arg1->floatval) == -1) + ret = 1; + else + ret = 0; + } else { + ret = (arg1->floatval == arg2->floatval); + } + break; + case XPATH_USERS: + case XPATH_POINT: + case XPATH_RANGE: + case XPATH_LOCATIONSET: + TODO + break; + case XPATH_NODESET: + case XPATH_XSLT_TREE: + break; + } + break; + case XPATH_USERS: + case XPATH_POINT: + case XPATH_RANGE: + case XPATH_LOCATIONSET: + TODO + break; + case XPATH_NODESET: + case XPATH_XSLT_TREE: + break; + } + xmlXPathFreeObject(arg1); + xmlXPathFreeObject(arg2); + return(ret); +} + +/** + * xmlXPathEqualValues: + * @ctxt: the XPath Parser context + * + * Implement the equal operation on XPath objects content: @arg1 == @arg2 + * + * Returns 0 or 1 depending on the results of the test. + */ +int +xmlXPathEqualValues(xmlXPathParserContextPtr ctxt) { + xmlXPathObjectPtr arg1, arg2, argtmp; + int ret = 0; + + arg2 = valuePop(ctxt); + arg1 = valuePop(ctxt); + if ((arg1 == NULL) || (arg2 == NULL)) { + if (arg1 != NULL) + xmlXPathFreeObject(arg1); + else + xmlXPathFreeObject(arg2); + XP_ERROR0(XPATH_INVALID_OPERAND); + } + + if (arg1 == arg2) { +#ifdef DEBUG_EXPR + xmlGenericError(xmlGenericErrorContext, + "Equal: by pointer\n"); +#endif + return(1); + } + + /* + *If either argument is a nodeset, it's a 'special case' + */ + if ((arg2->type == XPATH_NODESET) || (arg2->type == XPATH_XSLT_TREE) || + (arg1->type == XPATH_NODESET) || (arg1->type == XPATH_XSLT_TREE)) { + /* + *Hack it to assure arg1 is the nodeset + */ + if ((arg1->type != XPATH_NODESET) && (arg1->type != XPATH_XSLT_TREE)) { + argtmp = arg2; + arg2 = arg1; + arg1 = argtmp; + } + switch (arg2->type) { + case XPATH_UNDEFINED: +#ifdef DEBUG_EXPR + xmlGenericError(xmlGenericErrorContext, + "Equal: undefined\n"); +#endif + break; + case XPATH_NODESET: + case XPATH_XSLT_TREE: + ret = xmlXPathEqualNodeSets(arg1, arg2, 0); + break; + case XPATH_BOOLEAN: + if ((arg1->nodesetval == NULL) || + (arg1->nodesetval->nodeNr == 0)) ret = 0; + else + ret = 1; + ret = (ret == arg2->boolval); + break; + case XPATH_NUMBER: + ret = xmlXPathEqualNodeSetFloat(ctxt, arg1, arg2->floatval, 0); + break; + case XPATH_STRING: + ret = xmlXPathEqualNodeSetString(arg1, arg2->stringval, 0); + break; + case XPATH_USERS: + case XPATH_POINT: + case XPATH_RANGE: + case XPATH_LOCATIONSET: + TODO + break; + } + xmlXPathFreeObject(arg1); + xmlXPathFreeObject(arg2); + return(ret); + } + + return (xmlXPathEqualValuesCommon(ctxt, arg1, arg2)); +} + +/** + * xmlXPathNotEqualValues: + * @ctxt: the XPath Parser context + * + * Implement the equal operation on XPath objects content: @arg1 == @arg2 + * + * Returns 0 or 1 depending on the results of the test. + */ +int +xmlXPathNotEqualValues(xmlXPathParserContextPtr ctxt) { + xmlXPathObjectPtr arg1, arg2, argtmp; + int ret = 0; + + arg2 = valuePop(ctxt); + arg1 = valuePop(ctxt); + if ((arg1 == NULL) || (arg2 == NULL)) { + if (arg1 != NULL) + xmlXPathFreeObject(arg1); + else + xmlXPathFreeObject(arg2); + XP_ERROR0(XPATH_INVALID_OPERAND); + } + + if (arg1 == arg2) { +#ifdef DEBUG_EXPR + xmlGenericError(xmlGenericErrorContext, + "NotEqual: by pointer\n"); +#endif + return(0); + } + + /* + *If either argument is a nodeset, it's a 'special case' + */ + if ((arg2->type == XPATH_NODESET) || (arg2->type == XPATH_XSLT_TREE) || + (arg1->type == XPATH_NODESET) || (arg1->type == XPATH_XSLT_TREE)) { + /* + *Hack it to assure arg1 is the nodeset + */ + if ((arg1->type != XPATH_NODESET) && (arg1->type != XPATH_XSLT_TREE)) { + argtmp = arg2; + arg2 = arg1; + arg1 = argtmp; + } + switch (arg2->type) { + case XPATH_UNDEFINED: +#ifdef DEBUG_EXPR + xmlGenericError(xmlGenericErrorContext, + "NotEqual: undefined\n"); +#endif + break; + case XPATH_NODESET: + case XPATH_XSLT_TREE: + ret = xmlXPathEqualNodeSets(arg1, arg2, 1); + break; + case XPATH_BOOLEAN: + if ((arg1->nodesetval == NULL) || + (arg1->nodesetval->nodeNr == 0)) ret = 0; + else + ret = 1; + ret = (ret != arg2->boolval); + break; + case XPATH_NUMBER: + ret = xmlXPathEqualNodeSetFloat(ctxt, arg1, arg2->floatval, 1); + break; + case XPATH_STRING: + ret = xmlXPathEqualNodeSetString(arg1, arg2->stringval,1); + break; + case XPATH_USERS: + case XPATH_POINT: + case XPATH_RANGE: + case XPATH_LOCATIONSET: + TODO + break; + } + xmlXPathFreeObject(arg1); + xmlXPathFreeObject(arg2); + return(ret); + } + + return (!xmlXPathEqualValuesCommon(ctxt, arg1, arg2)); +} + +/** + * xmlXPathCompareValues: + * @ctxt: the XPath Parser context + * @inf: less than (1) or greater than (0) + * @strict: is the comparison strict + * + * Implement the compare operation on XPath objects: + * @arg1 < @arg2 (1, 1, ... + * @arg1 <= @arg2 (1, 0, ... + * @arg1 > @arg2 (0, 1, ... + * @arg1 >= @arg2 (0, 0, ... + * + * When neither object to be compared is a node-set and the operator is + * <=, <, >=, >, then the objects are compared by converted both objects + * to numbers and comparing the numbers according to IEEE 754. The < + * comparison will be true if and only if the first number is less than the + * second number. The <= comparison will be true if and only if the first + * number is less than or equal to the second number. The > comparison + * will be true if and only if the first number is greater than the second + * number. The >= comparison will be true if and only if the first number + * is greater than or equal to the second number. + * + * Returns 1 if the comparison succeeded, 0 if it failed + */ +int +xmlXPathCompareValues(xmlXPathParserContextPtr ctxt, int inf, int strict) { + int ret = 0, arg1i = 0, arg2i = 0; + xmlXPathObjectPtr arg1, arg2; + + arg2 = valuePop(ctxt); + arg1 = valuePop(ctxt); + if ((arg1 == NULL) || (arg2 == NULL)) { + if (arg1 != NULL) + xmlXPathFreeObject(arg1); + else + xmlXPathFreeObject(arg2); + XP_ERROR0(XPATH_INVALID_OPERAND); + } + + if ((arg2->type == XPATH_NODESET) || (arg2->type == XPATH_XSLT_TREE) || + (arg1->type == XPATH_NODESET) || (arg1->type == XPATH_XSLT_TREE)) { + if (((arg2->type == XPATH_NODESET) || (arg2->type == XPATH_XSLT_TREE)) && + ((arg1->type == XPATH_NODESET) || (arg1->type == XPATH_XSLT_TREE))){ + ret = xmlXPathCompareNodeSets(inf, strict, arg1, arg2); + } else { + if ((arg1->type == XPATH_NODESET) || (arg1->type == XPATH_XSLT_TREE)) { + ret = xmlXPathCompareNodeSetValue(ctxt, inf, strict, + arg1, arg2); + } else { + ret = xmlXPathCompareNodeSetValue(ctxt, !inf, strict, + arg2, arg1); + } + } + return(ret); + } + + if (arg1->type != XPATH_NUMBER) { + valuePush(ctxt, arg1); + xmlXPathNumberFunction(ctxt, 1); + arg1 = valuePop(ctxt); + } + if (arg1->type != XPATH_NUMBER) { + xmlXPathFreeObject(arg1); + xmlXPathFreeObject(arg2); + XP_ERROR0(XPATH_INVALID_OPERAND); + } + if (arg2->type != XPATH_NUMBER) { + valuePush(ctxt, arg2); + xmlXPathNumberFunction(ctxt, 1); + arg2 = valuePop(ctxt); + } + if (arg2->type != XPATH_NUMBER) { + xmlXPathFreeObject(arg1); + xmlXPathFreeObject(arg2); + XP_ERROR0(XPATH_INVALID_OPERAND); + } + /* + * Add tests for infinity and nan + * => feedback on 3.4 for Inf and NaN + */ + /* Hand check NaN and Infinity comparisons */ + if (xmlXPathIsNaN(arg1->floatval) || xmlXPathIsNaN(arg2->floatval)) { + ret=0; + } else { + arg1i=xmlXPathIsInf(arg1->floatval); + arg2i=xmlXPathIsInf(arg2->floatval); + if (inf && strict) { + if ((arg1i == -1 && arg2i != -1) || + (arg2i == 1 && arg1i != 1)) { + ret = 1; + } else if (arg1i == 0 && arg2i == 0) { + ret = (arg1->floatval < arg2->floatval); + } else { + ret = 0; + } + } + else if (inf && !strict) { + if (arg1i == -1 || arg2i == 1) { + ret = 1; + } else if (arg1i == 0 && arg2i == 0) { + ret = (arg1->floatval <= arg2->floatval); + } else { + ret = 0; + } + } + else if (!inf && strict) { + if ((arg1i == 1 && arg2i != 1) || + (arg2i == -1 && arg1i != -1)) { + ret = 1; + } else if (arg1i == 0 && arg2i == 0) { + ret = (arg1->floatval > arg2->floatval); + } else { + ret = 0; + } + } + else if (!inf && !strict) { + if (arg1i == 1 || arg2i == -1) { + ret = 1; + } else if (arg1i == 0 && arg2i == 0) { + ret = (arg1->floatval >= arg2->floatval); + } else { + ret = 0; + } + } + } + xmlXPathFreeObject(arg1); + xmlXPathFreeObject(arg2); + return(ret); +} + +/** + * xmlXPathValueFlipSign: + * @ctxt: the XPath Parser context + * + * Implement the unary - operation on an XPath object + * The numeric operators convert their operands to numbers as if + * by calling the number function. + */ +void +xmlXPathValueFlipSign(xmlXPathParserContextPtr ctxt) { + CAST_TO_NUMBER; + CHECK_TYPE(XPATH_NUMBER); + if (xmlXPathIsNaN(ctxt->value->floatval)) + ctxt->value->floatval=xmlXPathNAN; + else if (xmlXPathIsInf(ctxt->value->floatval) == 1) + ctxt->value->floatval=xmlXPathNINF; + else if (xmlXPathIsInf(ctxt->value->floatval) == -1) + ctxt->value->floatval=xmlXPathPINF; + else if (ctxt->value->floatval == 0) { + if (xmlXPathGetSign(ctxt->value->floatval) == 0) + ctxt->value->floatval = xmlXPathNZERO; + else + ctxt->value->floatval = 0; + } + else + ctxt->value->floatval = - ctxt->value->floatval; +} + +/** + * xmlXPathAddValues: + * @ctxt: the XPath Parser context + * + * Implement the add operation on XPath objects: + * The numeric operators convert their operands to numbers as if + * by calling the number function. + */ +void +xmlXPathAddValues(xmlXPathParserContextPtr ctxt) { + xmlXPathObjectPtr arg; + double val; + + arg = valuePop(ctxt); + if (arg == NULL) + XP_ERROR(XPATH_INVALID_OPERAND); + val = xmlXPathCastToNumber(arg); + xmlXPathFreeObject(arg); + + CAST_TO_NUMBER; + CHECK_TYPE(XPATH_NUMBER); + ctxt->value->floatval += val; +} + +/** + * xmlXPathSubValues: + * @ctxt: the XPath Parser context + * + * Implement the subtraction operation on XPath objects: + * The numeric operators convert their operands to numbers as if + * by calling the number function. + */ +void +xmlXPathSubValues(xmlXPathParserContextPtr ctxt) { + xmlXPathObjectPtr arg; + double val; + + arg = valuePop(ctxt); + if (arg == NULL) + XP_ERROR(XPATH_INVALID_OPERAND); + val = xmlXPathCastToNumber(arg); + xmlXPathFreeObject(arg); + + CAST_TO_NUMBER; + CHECK_TYPE(XPATH_NUMBER); + ctxt->value->floatval -= val; +} + +/** + * xmlXPathMultValues: + * @ctxt: the XPath Parser context + * + * Implement the multiply operation on XPath objects: + * The numeric operators convert their operands to numbers as if + * by calling the number function. + */ +void +xmlXPathMultValues(xmlXPathParserContextPtr ctxt) { + xmlXPathObjectPtr arg; + double val; + + arg = valuePop(ctxt); + if (arg == NULL) + XP_ERROR(XPATH_INVALID_OPERAND); + val = xmlXPathCastToNumber(arg); + xmlXPathFreeObject(arg); + + CAST_TO_NUMBER; + CHECK_TYPE(XPATH_NUMBER); + ctxt->value->floatval *= val; +} + +/** + * xmlXPathDivValues: + * @ctxt: the XPath Parser context + * + * Implement the div operation on XPath objects @arg1 / @arg2: + * The numeric operators convert their operands to numbers as if + * by calling the number function. + */ +void +xmlXPathDivValues(xmlXPathParserContextPtr ctxt) { + xmlXPathObjectPtr arg; + double val; + + arg = valuePop(ctxt); + if (arg == NULL) + XP_ERROR(XPATH_INVALID_OPERAND); + val = xmlXPathCastToNumber(arg); + xmlXPathFreeObject(arg); + + CAST_TO_NUMBER; + CHECK_TYPE(XPATH_NUMBER); + if (xmlXPathIsNaN(val) || xmlXPathIsNaN(ctxt->value->floatval)) + ctxt->value->floatval = xmlXPathNAN; + else if (val == 0 && xmlXPathGetSign(val) != 0) { + if (ctxt->value->floatval == 0) + ctxt->value->floatval = xmlXPathNAN; + else if (ctxt->value->floatval > 0) + ctxt->value->floatval = xmlXPathNINF; + else if (ctxt->value->floatval < 0) + ctxt->value->floatval = xmlXPathPINF; + } + else if (val == 0) { + if (ctxt->value->floatval == 0) + ctxt->value->floatval = xmlXPathNAN; + else if (ctxt->value->floatval > 0) + ctxt->value->floatval = xmlXPathPINF; + else if (ctxt->value->floatval < 0) + ctxt->value->floatval = xmlXPathNINF; + } else + ctxt->value->floatval /= val; +} + +/** + * xmlXPathModValues: + * @ctxt: the XPath Parser context + * + * Implement the mod operation on XPath objects: @arg1 / @arg2 + * The numeric operators convert their operands to numbers as if + * by calling the number function. + */ +void +xmlXPathModValues(xmlXPathParserContextPtr ctxt) { + xmlXPathObjectPtr arg; + double arg1, arg2; + + arg = valuePop(ctxt); + if (arg == NULL) + XP_ERROR(XPATH_INVALID_OPERAND); + arg2 = xmlXPathCastToNumber(arg); + xmlXPathFreeObject(arg); + + CAST_TO_NUMBER; + CHECK_TYPE(XPATH_NUMBER); + arg1 = ctxt->value->floatval; + if (arg2 == 0) + ctxt->value->floatval = xmlXPathNAN; + else { + ctxt->value->floatval = fmod(arg1, arg2); + } +} + +/************************************************************************ + * * + * The traversal functions * + * * + ************************************************************************/ + +/* + * A traversal function enumerates nodes along an axis. + * Initially it must be called with NULL, and it indicates + * termination on the axis by returning NULL. + */ +typedef xmlNodePtr (*xmlXPathTraversalFunction) + (xmlXPathParserContextPtr ctxt, xmlNodePtr cur); + +/** + * xmlXPathNextSelf: + * @ctxt: the XPath Parser context + * @cur: the current node in the traversal + * + * Traversal function for the "self" direction + * The self axis contains just the context node itself + * + * Returns the next element following that axis + */ +xmlNodePtr +xmlXPathNextSelf(xmlXPathParserContextPtr ctxt, xmlNodePtr cur) { + if (cur == NULL) + return(ctxt->context->node); + return(NULL); +} + +/** + * xmlXPathNextChild: + * @ctxt: the XPath Parser context + * @cur: the current node in the traversal + * + * Traversal function for the "child" direction + * The child axis contains the children of the context node in document order. + * + * Returns the next element following that axis + */ +xmlNodePtr +xmlXPathNextChild(xmlXPathParserContextPtr ctxt, xmlNodePtr cur) { + if (cur == NULL) { + if (ctxt->context->node == NULL) return(NULL); + switch (ctxt->context->node->type) { + case XML_ELEMENT_NODE: + case XML_TEXT_NODE: + case XML_CDATA_SECTION_NODE: + case XML_ENTITY_REF_NODE: + case XML_ENTITY_NODE: + case XML_PI_NODE: + case XML_COMMENT_NODE: + case XML_NOTATION_NODE: + case XML_DTD_NODE: + return(ctxt->context->node->children); + case XML_DOCUMENT_NODE: + case XML_DOCUMENT_TYPE_NODE: + case XML_DOCUMENT_FRAG_NODE: + case XML_HTML_DOCUMENT_NODE: +#ifdef LIBXML_DOCB_ENABLED + case XML_DOCB_DOCUMENT_NODE: +#endif + return(((xmlDocPtr) ctxt->context->node)->children); + case XML_ELEMENT_DECL: + case XML_ATTRIBUTE_DECL: + case XML_ENTITY_DECL: + case XML_ATTRIBUTE_NODE: + case XML_NAMESPACE_DECL: + case XML_XINCLUDE_START: + case XML_XINCLUDE_END: + return(NULL); + } + return(NULL); + } + if ((cur->type == XML_DOCUMENT_NODE) || + (cur->type == XML_HTML_DOCUMENT_NODE)) + return(NULL); + return(cur->next); +} + +/** + * xmlXPathNextDescendant: + * @ctxt: the XPath Parser context + * @cur: the current node in the traversal + * + * Traversal function for the "descendant" direction + * the descendant axis contains the descendants of the context node in document + * order; a descendant is a child or a child of a child and so on. + * + * Returns the next element following that axis + */ +xmlNodePtr +xmlXPathNextDescendant(xmlXPathParserContextPtr ctxt, xmlNodePtr cur) { + if (cur == NULL) { + if (ctxt->context->node == NULL) + return(NULL); + if ((ctxt->context->node->type == XML_ATTRIBUTE_NODE) || + (ctxt->context->node->type == XML_NAMESPACE_DECL)) + return(NULL); + + if (ctxt->context->node == (xmlNodePtr) ctxt->context->doc) + return(ctxt->context->doc->children); + return(ctxt->context->node->children); + } + + if (cur->children != NULL) { + /* + * Do not descend on entities declarations + */ + if (cur->children->type != XML_ENTITY_DECL) { + cur = cur->children; + /* + * Skip DTDs + */ + if (cur->type != XML_DTD_NODE) + return(cur); + } + } + + if (cur == ctxt->context->node) return(NULL); + + while (cur->next != NULL) { + cur = cur->next; + if ((cur->type != XML_ENTITY_DECL) && + (cur->type != XML_DTD_NODE)) + return(cur); + } + + do { + cur = cur->parent; + if (cur == NULL) return(NULL); + if (cur == ctxt->context->node) return(NULL); + if (cur->next != NULL) { + cur = cur->next; + return(cur); + } + } while (cur != NULL); + return(cur); +} + +/** + * xmlXPathNextDescendantOrSelf: + * @ctxt: the XPath Parser context + * @cur: the current node in the traversal + * + * Traversal function for the "descendant-or-self" direction + * the descendant-or-self axis contains the context node and the descendants + * of the context node in document order; thus the context node is the first + * node on the axis, and the first child of the context node is the second node + * on the axis + * + * Returns the next element following that axis + */ +xmlNodePtr +xmlXPathNextDescendantOrSelf(xmlXPathParserContextPtr ctxt, xmlNodePtr cur) { + if (cur == NULL) { + if (ctxt->context->node == NULL) + return(NULL); + if ((ctxt->context->node->type == XML_ATTRIBUTE_NODE) || + (ctxt->context->node->type == XML_NAMESPACE_DECL)) + return(NULL); + return(ctxt->context->node); + } + + return(xmlXPathNextDescendant(ctxt, cur)); +} + +/** + * xmlXPathNextParent: + * @ctxt: the XPath Parser context + * @cur: the current node in the traversal + * + * Traversal function for the "parent" direction + * The parent axis contains the parent of the context node, if there is one. + * + * Returns the next element following that axis + */ +xmlNodePtr +xmlXPathNextParent(xmlXPathParserContextPtr ctxt, xmlNodePtr cur) { + /* + * the parent of an attribute or namespace node is the element + * to which the attribute or namespace node is attached + * Namespace handling !!! + */ + if (cur == NULL) { + if (ctxt->context->node == NULL) return(NULL); + switch (ctxt->context->node->type) { + case XML_ELEMENT_NODE: + case XML_TEXT_NODE: + case XML_CDATA_SECTION_NODE: + case XML_ENTITY_REF_NODE: + case XML_ENTITY_NODE: + case XML_PI_NODE: + case XML_COMMENT_NODE: + case XML_NOTATION_NODE: + case XML_DTD_NODE: + case XML_ELEMENT_DECL: + case XML_ATTRIBUTE_DECL: + case XML_XINCLUDE_START: + case XML_XINCLUDE_END: + case XML_ENTITY_DECL: + if (ctxt->context->node->parent == NULL) + return((xmlNodePtr) ctxt->context->doc); + if ((ctxt->context->node->parent->type == XML_ELEMENT_NODE) && + ((ctxt->context->node->parent->name[0] == ' ') || + (xmlStrEqual(ctxt->context->node->parent->name, + BAD_CAST "fake node libxslt")))) + return(NULL); + return(ctxt->context->node->parent); + case XML_ATTRIBUTE_NODE: { + xmlAttrPtr att = (xmlAttrPtr) ctxt->context->node; + + return(att->parent); + } + case XML_DOCUMENT_NODE: + case XML_DOCUMENT_TYPE_NODE: + case XML_DOCUMENT_FRAG_NODE: + case XML_HTML_DOCUMENT_NODE: +#ifdef LIBXML_DOCB_ENABLED + case XML_DOCB_DOCUMENT_NODE: +#endif + return(NULL); + case XML_NAMESPACE_DECL: { + xmlNsPtr ns = (xmlNsPtr) ctxt->context->node; + + if ((ns->next != NULL) && + (ns->next->type != XML_NAMESPACE_DECL)) + return((xmlNodePtr) ns->next); + return(NULL); + } + } + } + return(NULL); +} + +/** + * xmlXPathNextAncestor: + * @ctxt: the XPath Parser context + * @cur: the current node in the traversal + * + * Traversal function for the "ancestor" direction + * the ancestor axis contains the ancestors of the context node; the ancestors + * of the context node consist of the parent of context node and the parent's + * parent and so on; the nodes are ordered in reverse document order; thus the + * parent is the first node on the axis, and the parent's parent is the second + * node on the axis + * + * Returns the next element following that axis + */ +xmlNodePtr +xmlXPathNextAncestor(xmlXPathParserContextPtr ctxt, xmlNodePtr cur) { + /* + * the parent of an attribute or namespace node is the element + * to which the attribute or namespace node is attached + * !!!!!!!!!!!!! + */ + if (cur == NULL) { + if (ctxt->context->node == NULL) return(NULL); + switch (ctxt->context->node->type) { + case XML_ELEMENT_NODE: + case XML_TEXT_NODE: + case XML_CDATA_SECTION_NODE: + case XML_ENTITY_REF_NODE: + case XML_ENTITY_NODE: + case XML_PI_NODE: + case XML_COMMENT_NODE: + case XML_DTD_NODE: + case XML_ELEMENT_DECL: + case XML_ATTRIBUTE_DECL: + case XML_ENTITY_DECL: + case XML_NOTATION_NODE: + case XML_XINCLUDE_START: + case XML_XINCLUDE_END: + if (ctxt->context->node->parent == NULL) + return((xmlNodePtr) ctxt->context->doc); + if ((ctxt->context->node->parent->type == XML_ELEMENT_NODE) && + ((ctxt->context->node->parent->name[0] == ' ') || + (xmlStrEqual(ctxt->context->node->parent->name, + BAD_CAST "fake node libxslt")))) + return(NULL); + return(ctxt->context->node->parent); + case XML_ATTRIBUTE_NODE: { + xmlAttrPtr tmp = (xmlAttrPtr) ctxt->context->node; + + return(tmp->parent); + } + case XML_DOCUMENT_NODE: + case XML_DOCUMENT_TYPE_NODE: + case XML_DOCUMENT_FRAG_NODE: + case XML_HTML_DOCUMENT_NODE: +#ifdef LIBXML_DOCB_ENABLED + case XML_DOCB_DOCUMENT_NODE: +#endif + return(NULL); + case XML_NAMESPACE_DECL: { + xmlNsPtr ns = (xmlNsPtr) ctxt->context->node; + + if ((ns->next != NULL) && + (ns->next->type != XML_NAMESPACE_DECL)) + return((xmlNodePtr) ns->next); + /* Bad, how did that namespace end up here ? */ + return(NULL); + } + } + return(NULL); + } + if (cur == ctxt->context->doc->children) + return((xmlNodePtr) ctxt->context->doc); + if (cur == (xmlNodePtr) ctxt->context->doc) + return(NULL); + switch (cur->type) { + case XML_ELEMENT_NODE: + case XML_TEXT_NODE: + case XML_CDATA_SECTION_NODE: + case XML_ENTITY_REF_NODE: + case XML_ENTITY_NODE: + case XML_PI_NODE: + case XML_COMMENT_NODE: + case XML_NOTATION_NODE: + case XML_DTD_NODE: + case XML_ELEMENT_DECL: + case XML_ATTRIBUTE_DECL: + case XML_ENTITY_DECL: + case XML_XINCLUDE_START: + case XML_XINCLUDE_END: + if (cur->parent == NULL) + return(NULL); + if ((cur->parent->type == XML_ELEMENT_NODE) && + ((cur->parent->name[0] == ' ') || + (xmlStrEqual(cur->parent->name, + BAD_CAST "fake node libxslt")))) + return(NULL); + return(cur->parent); + case XML_ATTRIBUTE_NODE: { + xmlAttrPtr att = (xmlAttrPtr) ctxt->context->node; + + return(att->parent); + } + case XML_NAMESPACE_DECL: { + xmlNsPtr ns = (xmlNsPtr) ctxt->context->node; + + if ((ns->next != NULL) && + (ns->next->type != XML_NAMESPACE_DECL)) + return((xmlNodePtr) ns->next); + /* Bad, how did that namespace end up here ? */ + return(NULL); + } + case XML_DOCUMENT_NODE: + case XML_DOCUMENT_TYPE_NODE: + case XML_DOCUMENT_FRAG_NODE: + case XML_HTML_DOCUMENT_NODE: +#ifdef LIBXML_DOCB_ENABLED + case XML_DOCB_DOCUMENT_NODE: +#endif + return(NULL); + } + return(NULL); +} + +/** + * xmlXPathNextAncestorOrSelf: + * @ctxt: the XPath Parser context + * @cur: the current node in the traversal + * + * Traversal function for the "ancestor-or-self" direction + * he ancestor-or-self axis contains the context node and ancestors of + * the context node in reverse document order; thus the context node is + * the first node on the axis, and the context node's parent the second; + * parent here is defined the same as with the parent axis. + * + * Returns the next element following that axis + */ +xmlNodePtr +xmlXPathNextAncestorOrSelf(xmlXPathParserContextPtr ctxt, xmlNodePtr cur) { + if (cur == NULL) + return(ctxt->context->node); + return(xmlXPathNextAncestor(ctxt, cur)); +} + +/** + * xmlXPathNextFollowingSibling: + * @ctxt: the XPath Parser context + * @cur: the current node in the traversal + * + * Traversal function for the "following-sibling" direction + * The following-sibling axis contains the following siblings of the context + * node in document order. + * + * Returns the next element following that axis + */ +xmlNodePtr +xmlXPathNextFollowingSibling(xmlXPathParserContextPtr ctxt, xmlNodePtr cur) { + if ((ctxt->context->node->type == XML_ATTRIBUTE_NODE) || + (ctxt->context->node->type == XML_NAMESPACE_DECL)) + return(NULL); + if (cur == (xmlNodePtr) ctxt->context->doc) + return(NULL); + if (cur == NULL) + return(ctxt->context->node->next); + return(cur->next); +} + +/** + * xmlXPathNextPrecedingSibling: + * @ctxt: the XPath Parser context + * @cur: the current node in the traversal + * + * Traversal function for the "preceding-sibling" direction + * The preceding-sibling axis contains the preceding siblings of the context + * node in reverse document order; the first preceding sibling is first on the + * axis; the sibling preceding that node is the second on the axis and so on. + * + * Returns the next element following that axis + */ +xmlNodePtr +xmlXPathNextPrecedingSibling(xmlXPathParserContextPtr ctxt, xmlNodePtr cur) { + if ((ctxt->context->node->type == XML_ATTRIBUTE_NODE) || + (ctxt->context->node->type == XML_NAMESPACE_DECL)) + return(NULL); + if (cur == (xmlNodePtr) ctxt->context->doc) + return(NULL); + if (cur == NULL) + return(ctxt->context->node->prev); + if ((cur->prev != NULL) && (cur->prev->type == XML_DTD_NODE)) { + cur = cur->prev; + if (cur == NULL) + return(ctxt->context->node->prev); + } + return(cur->prev); +} + +/** + * xmlXPathNextFollowing: + * @ctxt: the XPath Parser context + * @cur: the current node in the traversal + * + * Traversal function for the "following" direction + * The following axis contains all nodes in the same document as the context + * node that are after the context node in document order, excluding any + * descendants and excluding attribute nodes and namespace nodes; the nodes + * are ordered in document order + * + * Returns the next element following that axis + */ +xmlNodePtr +xmlXPathNextFollowing(xmlXPathParserContextPtr ctxt, xmlNodePtr cur) { + if (cur != NULL && cur->children != NULL) + return cur->children ; + if (cur == NULL) cur = ctxt->context->node; + if (cur == NULL) return(NULL) ; /* ERROR */ + if (cur->next != NULL) return(cur->next) ; + do { + cur = cur->parent; + if (cur == NULL) return(NULL); + if (cur == (xmlNodePtr) ctxt->context->doc) return(NULL); + if (cur->next != NULL) return(cur->next); + } while (cur != NULL); + return(cur); +} + +/* + * xmlXPathIsAncestor: + * @ancestor: the ancestor node + * @node: the current node + * + * Check that @ancestor is a @node's ancestor + * + * returns 1 if @ancestor is a @node's ancestor, 0 otherwise. + */ +static int +xmlXPathIsAncestor(xmlNodePtr ancestor, xmlNodePtr node) { + if ((ancestor == NULL) || (node == NULL)) return(0); + /* nodes need to be in the same document */ + if (ancestor->doc != node->doc) return(0); + /* avoid searching if ancestor or node is the root node */ + if (ancestor == (xmlNodePtr) node->doc) return(1); + if (node == (xmlNodePtr) ancestor->doc) return(0); + while (node->parent != NULL) { + if (node->parent == ancestor) + return(1); + node = node->parent; + } + return(0); +} + +/** + * xmlXPathNextPreceding: + * @ctxt: the XPath Parser context + * @cur: the current node in the traversal + * + * Traversal function for the "preceding" direction + * the preceding axis contains all nodes in the same document as the context + * node that are before the context node in document order, excluding any + * ancestors and excluding attribute nodes and namespace nodes; the nodes are + * ordered in reverse document order + * + * Returns the next element following that axis + */ +xmlNodePtr +xmlXPathNextPreceding(xmlXPathParserContextPtr ctxt, xmlNodePtr cur) +{ + if (cur == NULL) + cur = ctxt->context->node; + if (cur == NULL) + return (NULL); + if ((cur->prev != NULL) && (cur->prev->type == XML_DTD_NODE)) + cur = cur->prev; + do { + if (cur->prev != NULL) { + for (cur = cur->prev; cur->last != NULL; cur = cur->last) ; + return (cur); + } + + cur = cur->parent; + if (cur == NULL) + return (NULL); + if (cur == ctxt->context->doc->children) + return (NULL); + } while (xmlXPathIsAncestor(cur, ctxt->context->node)); + return (cur); +} + +/** + * xmlXPathNextPrecedingInternal: + * @ctxt: the XPath Parser context + * @cur: the current node in the traversal + * + * Traversal function for the "preceding" direction + * the preceding axis contains all nodes in the same document as the context + * node that are before the context node in document order, excluding any + * ancestors and excluding attribute nodes and namespace nodes; the nodes are + * ordered in reverse document order + * This is a faster implementation but internal only since it requires a + * state kept in the parser context: ctxt->ancestor. + * + * Returns the next element following that axis + */ +static xmlNodePtr +xmlXPathNextPrecedingInternal(xmlXPathParserContextPtr ctxt, + xmlNodePtr cur) +{ + if (cur == NULL) { + cur = ctxt->context->node; + if (cur == NULL) + return (NULL); + if (cur->type == XML_NAMESPACE_DECL) + cur = (xmlNodePtr)((xmlNsPtr)cur)->next; + ctxt->ancestor = cur->parent; + } + if ((cur->prev != NULL) && (cur->prev->type == XML_DTD_NODE)) + cur = cur->prev; + while (cur->prev == NULL) { + cur = cur->parent; + if (cur == NULL) + return (NULL); + if (cur == ctxt->context->doc->children) + return (NULL); + if (cur != ctxt->ancestor) + return (cur); + ctxt->ancestor = cur->parent; + } + cur = cur->prev; + while (cur->last != NULL) + cur = cur->last; + return (cur); +} + +/** + * xmlXPathNextNamespace: + * @ctxt: the XPath Parser context + * @cur: the current attribute in the traversal + * + * Traversal function for the "namespace" direction + * the namespace axis contains the namespace nodes of the context node; + * the order of nodes on this axis is implementation-defined; the axis will + * be empty unless the context node is an element + * + * We keep the XML namespace node at the end of the list. + * + * Returns the next element following that axis + */ +xmlNodePtr +xmlXPathNextNamespace(xmlXPathParserContextPtr ctxt, xmlNodePtr cur) { + if (ctxt->context->node->type != XML_ELEMENT_NODE) + return(NULL); + if (ctxt->context->tmpNsList == NULL && + cur != (xmlNodePtr) xmlXPathXMLNamespace) + { + if (ctxt->context->tmpNsList != NULL) + xmlFree(ctxt->context->tmpNsList); + ctxt->context->tmpNsList = + xmlGetNsList(ctxt->context->doc, ctxt->context->node); + ctxt->context->tmpNsNr = 0; + if (ctxt->context->tmpNsList != NULL) { + while (ctxt->context->tmpNsList[ctxt->context->tmpNsNr] != NULL) { + ctxt->context->tmpNsNr++; + } + } + return((xmlNodePtr) xmlXPathXMLNamespace); + } + if (ctxt->context->tmpNsNr > 0) { + return (xmlNodePtr)ctxt->context->tmpNsList[--ctxt->context->tmpNsNr]; + } else { + if (ctxt->context->tmpNsList != NULL) + xmlFree(ctxt->context->tmpNsList); + ctxt->context->tmpNsList = NULL; + return(NULL); + } +} + +/** + * xmlXPathNextAttribute: + * @ctxt: the XPath Parser context + * @cur: the current attribute in the traversal + * + * Traversal function for the "attribute" direction + * TODO: support DTD inherited default attributes + * + * Returns the next element following that axis + */ +xmlNodePtr +xmlXPathNextAttribute(xmlXPathParserContextPtr ctxt, xmlNodePtr cur) { + if (ctxt->context->node == NULL) + return(NULL); + if (ctxt->context->node->type != XML_ELEMENT_NODE) + return(NULL); + if (cur == NULL) { + if (ctxt->context->node == (xmlNodePtr) ctxt->context->doc) + return(NULL); + return((xmlNodePtr)ctxt->context->node->properties); + } + return((xmlNodePtr)cur->next); +} + +/************************************************************************ + * * + * NodeTest Functions * + * * + ************************************************************************/ + +#define IS_FUNCTION 200 + + +/************************************************************************ + * * + * Implicit tree core function library * + * * + ************************************************************************/ + +/** + * xmlXPathRoot: + * @ctxt: the XPath Parser context + * + * Initialize the context to the root of the document + */ +void +xmlXPathRoot(xmlXPathParserContextPtr ctxt) { + ctxt->context->node = (xmlNodePtr) ctxt->context->doc; + valuePush(ctxt, xmlXPathNewNodeSet(ctxt->context->node)); +} + +/************************************************************************ + * * + * The explicit core function library * + *http://www.w3.org/Style/XSL/Group/1999/07/xpath-19990705.html#corelib * + * * + ************************************************************************/ + + +/** + * xmlXPathLastFunction: + * @ctxt: the XPath Parser context + * @nargs: the number of arguments + * + * Implement the last() XPath function + * number last() + * The last function returns the number of nodes in the context node list. + */ +void +xmlXPathLastFunction(xmlXPathParserContextPtr ctxt, int nargs) { + CHECK_ARITY(0); + if (ctxt->context->contextSize >= 0) { + valuePush(ctxt, xmlXPathNewFloat((double) ctxt->context->contextSize)); +#ifdef DEBUG_EXPR + xmlGenericError(xmlGenericErrorContext, + "last() : %d\n", ctxt->context->contextSize); +#endif + } else { + XP_ERROR(XPATH_INVALID_CTXT_SIZE); + } +} + +/** + * xmlXPathPositionFunction: + * @ctxt: the XPath Parser context + * @nargs: the number of arguments + * + * Implement the position() XPath function + * number position() + * The position function returns the position of the context node in the + * context node list. The first position is 1, and so the last position + * will be equal to last(). + */ +void +xmlXPathPositionFunction(xmlXPathParserContextPtr ctxt, int nargs) { + CHECK_ARITY(0); + if (ctxt->context->proximityPosition >= 0) { + valuePush(ctxt, + xmlXPathNewFloat((double) ctxt->context->proximityPosition)); +#ifdef DEBUG_EXPR + xmlGenericError(xmlGenericErrorContext, "position() : %d\n", + ctxt->context->proximityPosition); +#endif + } else { + XP_ERROR(XPATH_INVALID_CTXT_POSITION); + } +} + +/** + * xmlXPathCountFunction: + * @ctxt: the XPath Parser context + * @nargs: the number of arguments + * + * Implement the count() XPath function + * number count(node-set) + */ +void +xmlXPathCountFunction(xmlXPathParserContextPtr ctxt, int nargs) { + xmlXPathObjectPtr cur; + + CHECK_ARITY(1); + if ((ctxt->value == NULL) || + ((ctxt->value->type != XPATH_NODESET) && + (ctxt->value->type != XPATH_XSLT_TREE))) + XP_ERROR(XPATH_INVALID_TYPE); + cur = valuePop(ctxt); + + if ((cur == NULL) || (cur->nodesetval == NULL)) + valuePush(ctxt, xmlXPathNewFloat((double) 0)); + else if ((cur->type == XPATH_NODESET) || (cur->type == XPATH_XSLT_TREE)) { + valuePush(ctxt, xmlXPathNewFloat((double) cur->nodesetval->nodeNr)); + } else { + if ((cur->nodesetval->nodeNr != 1) || + (cur->nodesetval->nodeTab == NULL)) { + valuePush(ctxt, xmlXPathNewFloat((double) 0)); + } else { + xmlNodePtr tmp; + int i = 0; + + tmp = cur->nodesetval->nodeTab[0]; + if (tmp != NULL) { + tmp = tmp->children; + while (tmp != NULL) { + tmp = tmp->next; + i++; + } + } + valuePush(ctxt, xmlXPathNewFloat((double) i)); + } + } + xmlXPathFreeObject(cur); +} + +/** + * xmlXPathGetElementsByIds: + * @doc: the document + * @ids: a whitespace separated list of IDs + * + * Selects elements by their unique ID. + * + * Returns a node-set of selected elements. + */ +static xmlNodeSetPtr +xmlXPathGetElementsByIds (xmlDocPtr doc, const xmlChar *ids) { + xmlNodeSetPtr ret; + const xmlChar *cur = ids; + xmlChar *ID; + xmlAttrPtr attr; + xmlNodePtr elem = NULL; + + if (ids == NULL) return(NULL); + + ret = xmlXPathNodeSetCreate(NULL); + + if ( !ret ) + return NULL; + while (IS_BLANK_CH(*cur)) cur++; + while (*cur != 0) { + while ((!IS_BLANK_CH(*cur)) && (*cur != 0)) + cur++; + + ID = xmlStrndup(ids, cur - ids); + if (ID != NULL) { + /* + * We used to check the fact that the value passed + * was an NCName, but this generated much troubles for + * me and Aleksey Sanin, people blatantly violated that + * constaint, like Visa3D spec. + * if (xmlValidateNCName(ID, 1) == 0) + */ + attr = xmlGetID(doc, ID); + if (attr != NULL) { + if (attr->type == XML_ATTRIBUTE_NODE) + elem = attr->parent; + else if (attr->type == XML_ELEMENT_NODE) + elem = (xmlNodePtr) attr; + else + elem = NULL; + if (elem != NULL) + xmlXPathNodeSetAdd(ret, elem); + } + xmlFree(ID); + } + + while (IS_BLANK_CH(*cur)) cur++; + ids = cur; + } + return(ret); +} + +/** + * xmlXPathIdFunction: + * @ctxt: the XPath Parser context + * @nargs: the number of arguments + * + * Implement the id() XPath function + * node-set id(object) + * The id function selects elements by their unique ID + * (see [5.2.1 Unique IDs]). When the argument to id is of type node-set, + * then the result is the union of the result of applying id to the + * string value of each of the nodes in the argument node-set. When the + * argument to id is of any other type, the argument is converted to a + * string as if by a call to the string function; the string is split + * into a whitespace-separated list of tokens (whitespace is any sequence + * of characters matching the production S); the result is a node-set + * containing the elements in the same document as the context node that + * have a unique ID equal to any of the tokens in the list. + */ +void +xmlXPathIdFunction(xmlXPathParserContextPtr ctxt, int nargs) { + xmlChar *tokens; + xmlNodeSetPtr ret; + xmlXPathObjectPtr obj; + xmlXPathObjectPtr wrappedNodeSet; + + CHECK_ARITY(1); + obj = valuePop(ctxt); + if (obj == NULL) XP_ERROR(XPATH_INVALID_OPERAND); + if ((obj->type == XPATH_NODESET) || (obj->type == XPATH_XSLT_TREE)) { + xmlNodeSetPtr ns; + int i; + + ret = xmlXPathNodeSetCreate(NULL); + + if (obj->nodesetval != NULL) { + for (i = 0; i < obj->nodesetval->nodeNr; i++) { + tokens = + xmlXPathCastNodeToString(obj->nodesetval->nodeTab[i]); + ns = xmlXPathGetElementsByIds(ctxt->context->doc, tokens); + ret = xmlXPathNodeSetMerge(ret, ns); + xmlXPathFreeNodeSet(ns); + if (tokens != NULL) + xmlFree(tokens); + } + } + + xmlXPathFreeObject(obj); + valuePush(ctxt, xmlXPathWrapNodeSet(ret)); + return; + } + obj = xmlXPathConvertString(obj); + + ret = xmlXPathGetElementsByIds(ctxt->context->doc, obj->stringval); + wrappedNodeSet = xmlXPathWrapNodeSet(ret); + if ( !wrappedNodeSet ) + { + xmlXPathFreeNodeSet( ret ); + } + valuePush(ctxt, wrappedNodeSet); + + xmlXPathFreeObject(obj); + return; +} + +/** + * xmlXPathLocalNameFunction: + * @ctxt: the XPath Parser context + * @nargs: the number of arguments + * + * Implement the local-name() XPath function + * string local-name(node-set?) + * The local-name function returns a string containing the local part + * of the name of the node in the argument node-set that is first in + * document order. If the node-set is empty or the first node has no + * name, an empty string is returned. If the argument is omitted it + * defaults to the context node. + */ +void +xmlXPathLocalNameFunction(xmlXPathParserContextPtr ctxt, int nargs) { + xmlXPathObjectPtr cur; + + if (nargs == 0) { + valuePush(ctxt, xmlXPathNewNodeSet(ctxt->context->node)); + nargs = 1; + } + + CHECK_ARITY(1); + if ((ctxt->value == NULL) || + ((ctxt->value->type != XPATH_NODESET) && + (ctxt->value->type != XPATH_XSLT_TREE))) + XP_ERROR(XPATH_INVALID_TYPE); + cur = valuePop(ctxt); + + if ((cur->nodesetval == NULL) || (cur->nodesetval->nodeNr == 0)) { + valuePush(ctxt, xmlXPathNewCString("")); + } else { + int i = 0; /* Should be first in document order !!!!! */ + switch (cur->nodesetval->nodeTab[i]->type) { + case XML_ELEMENT_NODE: + case XML_ATTRIBUTE_NODE: + case XML_PI_NODE: + if (cur->nodesetval->nodeTab[i]->name[0] == ' ') + valuePush(ctxt, xmlXPathNewCString("")); + else + valuePush(ctxt, + xmlXPathNewString(cur->nodesetval->nodeTab[i]->name)); + break; + case XML_NAMESPACE_DECL: + valuePush(ctxt, xmlXPathNewString( + ((xmlNsPtr)cur->nodesetval->nodeTab[i])->prefix)); + break; + default: + valuePush(ctxt, xmlXPathNewCString("")); + } + } + xmlXPathFreeObject(cur); +} + +/** + * xmlXPathNamespaceURIFunction: + * @ctxt: the XPath Parser context + * @nargs: the number of arguments + * + * Implement the namespace-uri() XPath function + * string namespace-uri(node-set?) + * The namespace-uri function returns a string containing the + * namespace URI of the expanded name of the node in the argument + * node-set that is first in document order. If the node-set is empty, + * the first node has no name, or the expanded name has no namespace + * URI, an empty string is returned. If the argument is omitted it + * defaults to the context node. + */ +void +xmlXPathNamespaceURIFunction(xmlXPathParserContextPtr ctxt, int nargs) { + xmlXPathObjectPtr cur; + + if (nargs == 0) { + valuePush(ctxt, xmlXPathNewNodeSet(ctxt->context->node)); + nargs = 1; + } + CHECK_ARITY(1); + if ((ctxt->value == NULL) || + ((ctxt->value->type != XPATH_NODESET) && + (ctxt->value->type != XPATH_XSLT_TREE))) + XP_ERROR(XPATH_INVALID_TYPE); + cur = valuePop(ctxt); + + if ((cur->nodesetval == NULL) || (cur->nodesetval->nodeNr == 0)) { + valuePush(ctxt, xmlXPathNewCString("")); + } else { + int i = 0; /* Should be first in document order !!!!! */ + switch (cur->nodesetval->nodeTab[i]->type) { + case XML_ELEMENT_NODE: + case XML_ATTRIBUTE_NODE: + if (cur->nodesetval->nodeTab[i]->ns == NULL) + valuePush(ctxt, xmlXPathNewCString("")); + else + valuePush(ctxt, xmlXPathNewString( + cur->nodesetval->nodeTab[i]->ns->href)); + break; + default: + valuePush(ctxt, xmlXPathNewCString("")); + } + } + xmlXPathFreeObject(cur); +} + +/** + * xmlXPathNameFunction: + * @ctxt: the XPath Parser context + * @nargs: the number of arguments + * + * Implement the name() XPath function + * string name(node-set?) + * The name function returns a string containing a QName representing + * the name of the node in the argument node-set that is first in document + * order. The QName must represent the name with respect to the namespace + * declarations in effect on the node whose name is being represented. + * Typically, this will be the form in which the name occurred in the XML + * source. This need not be the case if there are namespace declarations + * in effect on the node that associate multiple prefixes with the same + * namespace. However, an implementation may include information about + * the original prefix in its representation of nodes; in this case, an + * implementation can ensure that the returned string is always the same + * as the QName used in the XML source. If the argument it omitted it + * defaults to the context node. + * Libxml keep the original prefix so the "real qualified name" used is + * returned. + */ +static void +xmlXPathNameFunction(xmlXPathParserContextPtr ctxt, int nargs) +{ + xmlXPathObjectPtr cur; + + if (nargs == 0) { + valuePush(ctxt, xmlXPathNewNodeSet(ctxt->context->node)); + nargs = 1; + } + + CHECK_ARITY(1); + if ((ctxt->value == NULL) || + ((ctxt->value->type != XPATH_NODESET) && + (ctxt->value->type != XPATH_XSLT_TREE))) + XP_ERROR(XPATH_INVALID_TYPE); + cur = valuePop(ctxt); + + if ((cur->nodesetval == NULL) || (cur->nodesetval->nodeNr == 0)) { + valuePush(ctxt, xmlXPathNewCString("")); + } else { + int i = 0; /* Should be first in document order !!!!! */ + + switch (cur->nodesetval->nodeTab[i]->type) { + case XML_ELEMENT_NODE: + case XML_ATTRIBUTE_NODE: + if (cur->nodesetval->nodeTab[i]->name[0] == ' ') + valuePush(ctxt, xmlXPathNewCString("")); + else if ((cur->nodesetval->nodeTab[i]->ns == NULL) || + (cur->nodesetval->nodeTab[i]->ns->prefix == NULL)) { + valuePush(ctxt, + xmlXPathNewString(cur->nodesetval->nodeTab[i]->name)); + + } else { + xmlChar *fullname; + + fullname = xmlBuildQName(cur->nodesetval->nodeTab[i]->name, + cur->nodesetval->nodeTab[i]->ns->prefix, + NULL, 0); + if (fullname == cur->nodesetval->nodeTab[i]->name) + fullname = xmlStrdup(cur->nodesetval->nodeTab[i]->name); + if (fullname == NULL) { + XP_ERROR(XPATH_MEMORY_ERROR); + } + valuePush(ctxt, xmlXPathWrapString(fullname)); + } + break; + default: + valuePush(ctxt, + xmlXPathNewNodeSet(cur->nodesetval->nodeTab[i])); + xmlXPathLocalNameFunction(ctxt, 1); + } + } + xmlXPathFreeObject(cur); +} + + +/** + * xmlXPathStringFunction: + * @ctxt: the XPath Parser context + * @nargs: the number of arguments + * + * Implement the string() XPath function + * string string(object?) + * The string function converts an object to a string as follows: + * - A node-set is converted to a string by returning the value of + * the node in the node-set that is first in document order. + * If the node-set is empty, an empty string is returned. + * - A number is converted to a string as follows + * + NaN is converted to the string NaN + * + positive zero is converted to the string 0 + * + negative zero is converted to the string 0 + * + positive infinity is converted to the string Infinity + * + negative infinity is converted to the string -Infinity + * + if the number is an integer, the number is represented in + * decimal form as a Number with no decimal point and no leading + * zeros, preceded by a minus sign (-) if the number is negative + * + otherwise, the number is represented in decimal form as a + * Number including a decimal point with at least one digit + * before the decimal point and at least one digit after the + * decimal point, preceded by a minus sign (-) if the number + * is negative; there must be no leading zeros before the decimal + * point apart possibly from the one required digit immediately + * before the decimal point; beyond the one required digit + * after the decimal point there must be as many, but only as + * many, more digits as are needed to uniquely distinguish the + * number from all other IEEE 754 numeric values. + * - The boolean false value is converted to the string false. + * The boolean true value is converted to the string true. + * + * If the argument is omitted, it defaults to a node-set with the + * context node as its only member. + */ +void +xmlXPathStringFunction(xmlXPathParserContextPtr ctxt, int nargs) { + xmlXPathObjectPtr cur; + + if (nargs == 0) { + valuePush(ctxt, + xmlXPathWrapString( + xmlXPathCastNodeToString(ctxt->context->node))); + return; + } + + CHECK_ARITY(1); + cur = valuePop(ctxt); + if (cur == NULL) XP_ERROR(XPATH_INVALID_OPERAND); + cur = xmlXPathConvertString(cur); + if(OOM_FLAG) return; + valuePush(ctxt, cur); +} + +/** + * xmlXPathStringLengthFunction: + * @ctxt: the XPath Parser context + * @nargs: the number of arguments + * + * Implement the string-length() XPath function + * number string-length(string?) + * The string-length returns the number of characters in the string + * (see [3.6 Strings]). If the argument is omitted, it defaults to + * the context node converted to a string, in other words the value + * of the context node. + */ +void +xmlXPathStringLengthFunction(xmlXPathParserContextPtr ctxt, int nargs) { + xmlXPathObjectPtr cur; + + if (nargs == 0) { + if (ctxt->context->node == NULL) { + valuePush(ctxt, xmlXPathNewFloat(0)); + } else { + xmlChar *content; + + content = xmlXPathCastNodeToString(ctxt->context->node); + valuePush(ctxt, xmlXPathNewFloat(xmlUTF8Strlen(content))); + xmlFree(content); + } + return; + } + CHECK_ARITY(1); + CAST_TO_STRING; + CHECK_TYPE(XPATH_STRING); + cur = valuePop(ctxt); + valuePush(ctxt, xmlXPathNewFloat(xmlUTF8Strlen(cur->stringval))); + xmlXPathFreeObject(cur); +} + +/** + * xmlXPathConcatFunction: + * @ctxt: the XPath Parser context + * @nargs: the number of arguments + * + * Implement the concat() XPath function + * string concat(string, string, string*) + * The concat function returns the concatenation of its arguments. + */ +void +xmlXPathConcatFunction(xmlXPathParserContextPtr ctxt, int nargs) { + xmlXPathObjectPtr cur, newobj; + xmlChar *tmp; + + if (nargs < 2) { + CHECK_ARITY(2); + } + + CAST_TO_STRING; + cur = valuePop(ctxt); + if ((cur == NULL) || (cur->type != XPATH_STRING)) { + xmlXPathFreeObject(cur); + return; + } + nargs--; + + while (nargs > 0) { + CAST_TO_STRING; + newobj = valuePop(ctxt); + if ((newobj == NULL) || (newobj->type != XPATH_STRING)) { + xmlXPathFreeObject(newobj); + xmlXPathFreeObject(cur); + XP_ERROR(XPATH_INVALID_TYPE); + } + tmp = xmlStrcat(newobj->stringval, cur->stringval); + newobj->stringval = cur->stringval; + cur->stringval = tmp; + + xmlXPathFreeObject(newobj); + nargs--; + } + valuePush(ctxt, cur); +} + +/** + * xmlXPathContainsFunction: + * @ctxt: the XPath Parser context + * @nargs: the number of arguments + * + * Implement the contains() XPath function + * boolean contains(string, string) + * The contains function returns true if the first argument string + * contains the second argument string, and otherwise returns false. + */ +void +xmlXPathContainsFunction(xmlXPathParserContextPtr ctxt, int nargs) { + xmlXPathObjectPtr hay, needle; + + CHECK_ARITY(2); + CAST_TO_STRING; + CHECK_TYPE(XPATH_STRING); + needle = valuePop(ctxt); + CAST_TO_STRING; + hay = valuePop(ctxt); + if ((hay == NULL) || (hay->type != XPATH_STRING)) { + xmlXPathFreeObject(hay); + xmlXPathFreeObject(needle); + XP_ERROR(XPATH_INVALID_TYPE); + } + if (xmlStrstr(hay->stringval, needle->stringval)) + valuePush(ctxt, xmlXPathNewBoolean(1)); + else + valuePush(ctxt, xmlXPathNewBoolean(0)); + xmlXPathFreeObject(hay); + xmlXPathFreeObject(needle); +} + +/** + * xmlXPathStartsWithFunction: + * @ctxt: the XPath Parser context + * @nargs: the number of arguments + * + * Implement the starts-with() XPath function + * boolean starts-with(string, string) + * The starts-with function returns true if the first argument string + * starts with the second argument string, and otherwise returns false. + */ +void +xmlXPathStartsWithFunction(xmlXPathParserContextPtr ctxt, int nargs) { + xmlXPathObjectPtr hay, needle; + int n; + + CHECK_ARITY(2); + CAST_TO_STRING; + CHECK_TYPE(XPATH_STRING); + needle = valuePop(ctxt); + CAST_TO_STRING; + hay = valuePop(ctxt); + if ((hay == NULL) || (hay->type != XPATH_STRING)) { + xmlXPathFreeObject(hay); + xmlXPathFreeObject(needle); + XP_ERROR(XPATH_INVALID_TYPE); + } + n = xmlStrlen(needle->stringval); + if (xmlStrncmp(hay->stringval, needle->stringval, n)) + valuePush(ctxt, xmlXPathNewBoolean(0)); + else + valuePush(ctxt, xmlXPathNewBoolean(1)); + xmlXPathFreeObject(hay); + xmlXPathFreeObject(needle); +} + +/** + * xmlXPathSubstringFunction: + * @ctxt: the XPath Parser context + * @nargs: the number of arguments + * + * Implement the substring() XPath function + * string substring(string, number, number?) + * The substring function returns the substring of the first argument + * starting at the position specified in the second argument with + * length specified in the third argument. For example, + * substring("12345",2,3) returns "234". If the third argument is not + * specified, it returns the substring starting at the position specified + * in the second argument and continuing to the end of the string. For + * example, substring("12345",2) returns "2345". More precisely, each + * character in the string (see [3.6 Strings]) is considered to have a + * numeric position: the position of the first character is 1, the position + * of the second character is 2 and so on. The returned substring contains + * those characters for which the position of the character is greater than + * or equal to the second argument and, if the third argument is specified, + * less than the sum of the second and third arguments; the comparisons + * and addition used for the above follow the standard IEEE 754 rules. Thus: + * - substring("12345", 1.5, 2.6) returns "234" + * - substring("12345", 0, 3) returns "12" + * - substring("12345", 0 div 0, 3) returns "" + * - substring("12345", 1, 0 div 0) returns "" + * - substring("12345", -42, 1 div 0) returns "12345" + * - substring("12345", -1 div 0, 1 div 0) returns "" + */ +void +xmlXPathSubstringFunction(xmlXPathParserContextPtr ctxt, int nargs) { + xmlXPathObjectPtr str, start, len; + double le=0, in; + // TODO: Name "l" is bad for a variable -- refactor it + int i, l, m; + xmlChar *ret; + + if (nargs < 2) { + // TODO: Use of these CHECK_ARITY macros is bad ... + // -- make check manually OR define normal macro for that + CHECK_ARITY(2); + } + if (nargs > 3) { + CHECK_ARITY(3); + } + /* + * take care of possible last (position) argument + */ + if (nargs == 3) { + CAST_TO_NUMBER; + CHECK_TYPE(XPATH_NUMBER); + len = valuePop(ctxt); + le = len->floatval; + xmlXPathFreeObject(len); + } + + CAST_TO_NUMBER; + CHECK_TYPE(XPATH_NUMBER); + start = valuePop(ctxt); + in = start->floatval; + xmlXPathFreeObject(start); + CAST_TO_STRING; + CHECK_TYPE(XPATH_STRING); + str = valuePop(ctxt); + m = xmlUTF8Strlen((const unsigned char *)str->stringval); + + /* + * If last pos not present, calculate last position + */ + if (nargs != 3) { + le = (double)m; + if (in < 1.0) + in = 1.0; + } + + /* Need to check for the special cases where either + * the index is NaN, the length is NaN, or both + * arguments are infinity (relying on Inf + -Inf = NaN) + */ + if (!xmlXPathIsNaN(in + le) && !xmlXPathIsInf(in)) { + /* + * To meet the requirements of the spec, the arguments + * must be converted to integer format before + * initial index calculations are done + * + * First we go to integer form, rounding up + * and checking for special cases + */ + i = (int) in; + if (((double)i)+0.5 <= in) i++; + + if (xmlXPathIsInf(le) == 1) { + l = m; + if (i < 1) + i = 1; + } + else if (xmlXPathIsInf(le) == -1 || le < 0.0) + l = 0; + else { + l = (int) le; + if (((double)l)+0.5 <= le) l++; + } + + /* Now we normalize inidices */ + i -= 1; + l += i; + if (i < 0) + i = 0; + if (l > m) + l = m; + + /* number of chars to copy */ + l -= i; + + ret = xmlUTF8Strsub(str->stringval, i, l); + } + else { + ret = NULL; + } + + if (ret == NULL) + valuePush(ctxt, xmlXPathNewCString("")); + else { + valuePush(ctxt, xmlXPathNewString(ret)); + xmlFree(ret); + } + + xmlXPathFreeObject(str); +} + +/** + * xmlXPathSubstringBeforeFunction: + * @ctxt: the XPath Parser context + * @nargs: the number of arguments + * + * Implement the substring-before() XPath function + * string substring-before(string, string) + * The substring-before function returns the substring of the first + * argument string that precedes the first occurrence of the second + * argument string in the first argument string, or the empty string + * if the first argument string does not contain the second argument + * string. For example, substring-before("1999/04/01","/") returns 1999. + */ +void +xmlXPathSubstringBeforeFunction(xmlXPathParserContextPtr ctxt, int nargs) { + xmlXPathObjectPtr str; + xmlXPathObjectPtr find; + xmlBufferPtr target; + const xmlChar *point; + int offset; + + CHECK_ARITY(2); + CAST_TO_STRING; + find = valuePop(ctxt); + CAST_TO_STRING; + str = valuePop(ctxt); + + target = xmlBufferCreate(); + if (target) { + point = xmlStrstr(str->stringval, find->stringval); + if (point) { + offset = (int)(point - str->stringval); + xmlBufferAdd(target, str->stringval, offset); + } + valuePush(ctxt, xmlXPathNewString(xmlBufferContent(target))); + xmlBufferFree(target); + } + + xmlXPathFreeObject(str); + xmlXPathFreeObject(find); +} + +/** + * xmlXPathSubstringAfterFunction: + * @ctxt: the XPath Parser context + * @nargs: the number of arguments + * + * Implement the substring-after() XPath function + * string substring-after(string, string) + * The substring-after function returns the substring of the first + * argument string that follows the first occurrence of the second + * argument string in the first argument string, or the empty stringi + * if the first argument string does not contain the second argument + * string. For example, substring-after("1999/04/01","/") returns 04/01, + * and substring-after("1999/04/01","19") returns 99/04/01. + */ +void +xmlXPathSubstringAfterFunction(xmlXPathParserContextPtr ctxt, int nargs) { + xmlXPathObjectPtr str; + xmlXPathObjectPtr find; + xmlBufferPtr target; + const xmlChar *point; + int offset; + + CHECK_ARITY(2); + CAST_TO_STRING; + find = valuePop(ctxt); + CAST_TO_STRING; + str = valuePop(ctxt); + + target = xmlBufferCreate(); + if (target) { + point = xmlStrstr(str->stringval, find->stringval); + if (point) { + offset = (int)(point - str->stringval) + xmlStrlen(find->stringval); + xmlBufferAdd(target, &str->stringval[offset], + xmlStrlen(str->stringval) - offset); + } + valuePush(ctxt, xmlXPathNewString(xmlBufferContent(target))); + xmlBufferFree(target); + } + + xmlXPathFreeObject(str); + xmlXPathFreeObject(find); +} + +/** + * xmlXPathNormalizeFunction: + * @ctxt: the XPath Parser context + * @nargs: the number of arguments + * + * Implement the normalize-space() XPath function + * string normalize-space(string?) + * The normalize-space function returns the argument string with white + * space normalized by stripping leading and trailing whitespace + * and replacing sequences of whitespace characters by a single + * space. Whitespace characters are the same allowed by the S production + * in XML. If the argument is omitted, it defaults to the context + * node converted to a string, in other words the value of the context node. + */ +void +xmlXPathNormalizeFunction(xmlXPathParserContextPtr ctxt, int nargs) { + xmlXPathObjectPtr obj = NULL; + xmlChar *source = NULL; + xmlBufferPtr target; + xmlChar blank; + + if (nargs == 0) { + /* Use current context node */ + valuePush(ctxt, + xmlXPathWrapString( + xmlXPathCastNodeToString(ctxt->context->node))); + nargs = 1; + } + + CHECK_ARITY(1); + CAST_TO_STRING; + CHECK_TYPE(XPATH_STRING); + obj = valuePop(ctxt); + source = obj->stringval; + + target = xmlBufferCreate(); + if (target && source) { + + /* Skip leading whitespaces */ + while (IS_BLANK_CH(*source)) + source++; + + /* Collapse intermediate whitespaces, and skip trailing whitespaces */ + blank = 0; + while (*source) { + if (IS_BLANK_CH(*source)) { + blank = 0x20; + } else { + if (blank) { + xmlBufferAdd(target, &blank, 1); + blank = 0; + } + xmlBufferAdd(target, source, 1); + } + source++; + } + + valuePush(ctxt, xmlXPathNewString(xmlBufferContent(target))); + xmlBufferFree(target); + } + xmlXPathFreeObject(obj); +} + +/** + * xmlXPathTranslateFunction: + * @ctxt: the XPath Parser context + * @nargs: the number of arguments + * + * Implement the translate() XPath function + * string translate(string, string, string) + * The translate function returns the first argument string with + * occurrences of characters in the second argument string replaced + * by the character at the corresponding position in the third argument + * string. For example, translate("bar","abc","ABC") returns the string + * BAr. If there is a character in the second argument string with no + * character at a corresponding position in the third argument string + * (because the second argument string is longer than the third argument + * string), then occurrences of that character in the first argument + * string are removed. For example, translate("--aaa--","abc-","ABC") + * returns "AAA". If a character occurs more than once in second + * argument string, then the first occurrence determines the replacement + * character. If the third argument string is longer than the second + * argument string, then excess characters are ignored. + */ +void +xmlXPathTranslateFunction(xmlXPathParserContextPtr ctxt, int nargs) { + xmlXPathObjectPtr str; + xmlXPathObjectPtr from; + xmlXPathObjectPtr to; + xmlBufferPtr target; + int offset, max; + xmlChar ch; + xmlChar *point; + xmlChar *cptr; + + CHECK_ARITY(3); + + CAST_TO_STRING; + to = valuePop(ctxt); + CAST_TO_STRING; + from = valuePop(ctxt); + CAST_TO_STRING; + str = valuePop(ctxt); + + target = xmlBufferCreate(); + if (target) { + max = xmlUTF8Strlen(to->stringval); + for (cptr = str->stringval; (ch=*cptr); ) { + offset = xmlUTF8Strloc(from->stringval, cptr); + if (offset >= 0) { + if (offset < max) { + point = xmlUTF8Strpos(to->stringval, offset); + if (point) + xmlBufferAdd(target, point, xmlUTF8Strsize(point, 1)); + } + } else + xmlBufferAdd(target, cptr, xmlUTF8Strsize(cptr, 1)); + + /* Step to next character in input */ + cptr++; + if ( ch & 0x80 ) { + /* if not simple ascii, verify proper format */ + if ( (ch & 0xc0) != 0xc0 ) { + xmlGenericError(xmlGenericErrorContext, + EMBED_ERRTXT("xmlXPathTranslateFunction: Invalid UTF8 string\n")); + break; + } + /* then skip over remaining bytes for this char */ + while ( (ch <<= 1) & 0x80 ) + if ( (*cptr++ & 0xc0) != 0x80 ) { + xmlGenericError(xmlGenericErrorContext, + EMBED_ERRTXT("xmlXPathTranslateFunction: Invalid UTF8 string\n")); + break; + } + if (ch & 0x80) /* must have had error encountered */ + break; + } + } + } + valuePush(ctxt, xmlXPathNewString(xmlBufferContent(target))); + xmlBufferFree(target); + xmlXPathFreeObject(str); + xmlXPathFreeObject(from); + xmlXPathFreeObject(to); +} + +/** + * xmlXPathBooleanFunction: + * @ctxt: the XPath Parser context + * @nargs: the number of arguments + * + * Implement the boolean() XPath function + * boolean boolean(object) + * The boolean function converts its argument to a boolean as follows: + * - a number is true if and only if it is neither positive or + * negative zero nor NaN + * - a node-set is true if and only if it is non-empty + * - a string is true if and only if its length is non-zero + */ +void +xmlXPathBooleanFunction(xmlXPathParserContextPtr ctxt, int nargs) { + xmlXPathObjectPtr cur; + + CHECK_ARITY(1); + cur = valuePop(ctxt); + if (cur == NULL) XP_ERROR(XPATH_INVALID_OPERAND); + cur = xmlXPathConvertBoolean(cur); + valuePush(ctxt, cur); +} + +/** + * xmlXPathNotFunction: + * @ctxt: the XPath Parser context + * @nargs: the number of arguments + * + * Implement the not() XPath function + * boolean not(boolean) + * The not function returns true if its argument is false, + * and false otherwise. + */ +void +xmlXPathNotFunction(xmlXPathParserContextPtr ctxt, int nargs) { + CHECK_ARITY(1); + CAST_TO_BOOLEAN; + CHECK_TYPE(XPATH_BOOLEAN); + ctxt->value->boolval = ! ctxt->value->boolval; +} + +/** + * xmlXPathTrueFunction: + * @ctxt: the XPath Parser context + * @nargs: the number of arguments + * + * Implement the true() XPath function + * boolean true() + */ +void +xmlXPathTrueFunction(xmlXPathParserContextPtr ctxt, int nargs) { + CHECK_ARITY(0); + valuePush(ctxt, xmlXPathNewBoolean(1)); +} + +/** + * xmlXPathFalseFunction: + * @ctxt: the XPath Parser context + * @nargs: the number of arguments + * + * Implement the false() XPath function + * boolean false() + */ +void +xmlXPathFalseFunction(xmlXPathParserContextPtr ctxt, int nargs) { + CHECK_ARITY(0); + valuePush(ctxt, xmlXPathNewBoolean(0)); +} + +/** + * xmlXPathLangFunction: + * @ctxt: the XPath Parser context + * @nargs: the number of arguments + * + * Implement the lang() XPath function + * boolean lang(string) + * The lang function returns true or false depending on whether the + * language of the context node as specified by xml:lang attributes + * is the same as or is a sublanguage of the language specified by + * the argument string. The language of the context node is determined + * by the value of the xml:lang attribute on the context node, or, if + * the context node has no xml:lang attribute, by the value of the + * xml:lang attribute on the nearest ancestor of the context node that + * has an xml:lang attribute. If there is no such attribute, then lang + * returns false. If there is such an attribute, then lang returns + * true if the attribute value is equal to the argument ignoring case, + * or if there is some suffix starting with - such that the attribute + * value is equal to the argument ignoring that suffix of the attribute + * value and ignoring case. + */ +void +xmlXPathLangFunction(xmlXPathParserContextPtr ctxt, int nargs) { + xmlXPathObjectPtr val; + const xmlChar *theLang; + const xmlChar *lang; + int ret = 0; + int i; + + CHECK_ARITY(1); + CAST_TO_STRING; + CHECK_TYPE(XPATH_STRING); + val = valuePop(ctxt); + lang = val->stringval; + theLang = xmlNodeGetLang(ctxt->context->node); + if ((theLang != NULL) && (lang != NULL)) { + for (i = 0;lang[i] != 0;i++) + if (toupper(lang[i]) != toupper(theLang[i])) + goto not_equal; + ret = 1; + } +not_equal: + if (theLang) + xmlFree((void *)theLang); + xmlXPathFreeObject(val); + valuePush(ctxt, xmlXPathNewBoolean(ret)); +} + +/** + * xmlXPathNumberFunction: + * @ctxt: the XPath Parser context + * @nargs: the number of arguments + * + * Implement the number() XPath function + * number number(object?) + */ +void +xmlXPathNumberFunction(xmlXPathParserContextPtr ctxt, int nargs) { + xmlXPathObjectPtr cur; + double res; + + if (nargs == 0) { + if (ctxt->context->node == NULL) { + valuePush(ctxt, xmlXPathNewFloat(0.0)); + } else { + xmlChar* content = xmlNodeGetContent(ctxt->context->node); + + res = xmlXPathStringEvalNumber(content); + valuePush(ctxt, xmlXPathNewFloat(res)); + xmlFree(content); + } + return; + } + + CHECK_ARITY(1); + cur = valuePop(ctxt); + cur = xmlXPathConvertNumber(cur); + valuePush(ctxt, cur); +} + +/** + * xmlXPathSumFunction: + * @ctxt: the XPath Parser context + * @nargs: the number of arguments + * + * Implement the sum() XPath function + * number sum(node-set) + * The sum function returns the sum of the values of the nodes in + * the argument node-set. + */ +void +xmlXPathSumFunction(xmlXPathParserContextPtr ctxt, int nargs) { + xmlXPathObjectPtr cur; + int i; + double res = 0.0; + + CHECK_ARITY(1); + if ((ctxt->value == NULL) || + ((ctxt->value->type != XPATH_NODESET) && + (ctxt->value->type != XPATH_XSLT_TREE))) + XP_ERROR(XPATH_INVALID_TYPE); + cur = valuePop(ctxt); + + if ((cur->nodesetval != NULL) && (cur->nodesetval->nodeNr != 0)) { + for (i = 0; i < cur->nodesetval->nodeNr; i++) { + res += xmlXPathCastNodeToNumber(cur->nodesetval->nodeTab[i]); + } + } + valuePush(ctxt, xmlXPathNewFloat(res)); + xmlXPathFreeObject(cur); +} + +/** + * xmlXPathFloorFunction: + * @ctxt: the XPath Parser context + * @nargs: the number of arguments + * + * Implement the floor() XPath function + * number floor(number) + * The floor function returns the largest (closest to positive infinity) + * number that is not greater than the argument and that is an integer. + */ +void +xmlXPathFloorFunction(xmlXPathParserContextPtr ctxt, int nargs) { + double f; + + CHECK_ARITY(1); + CAST_TO_NUMBER; + CHECK_TYPE(XPATH_NUMBER); + + f = (double)((int) ctxt->value->floatval); + if (f != ctxt->value->floatval) { + if (ctxt->value->floatval > 0) + ctxt->value->floatval = f; + else + ctxt->value->floatval = f - 1; + } +} + +/** + * xmlXPathCeilingFunction: + * @ctxt: the XPath Parser context + * @nargs: the number of arguments + * + * Implement the ceiling() XPath function + * number ceiling(number) + * The ceiling function returns the smallest (closest to negative infinity) + * number that is not less than the argument and that is an integer. + */ +void +xmlXPathCeilingFunction(xmlXPathParserContextPtr ctxt, int nargs) { + double f; + + CHECK_ARITY(1); + CAST_TO_NUMBER; + CHECK_TYPE(XPATH_NUMBER); + +#if 0 + ctxt->value->floatval = ceil(ctxt->value->floatval); +#else + f = (double)((int) ctxt->value->floatval); + if (f != ctxt->value->floatval) { + if (ctxt->value->floatval > 0) + ctxt->value->floatval = f + 1; + else { + if (ctxt->value->floatval < 0 && f == 0) + ctxt->value->floatval = xmlXPathNZERO; + else + ctxt->value->floatval = f; + } + + } +#endif +} + +/** + * xmlXPathRoundFunction: + * @ctxt: the XPath Parser context + * @nargs: the number of arguments + * + * Implement the round() XPath function + * number round(number) + * The round function returns the number that is closest to the + * argument and that is an integer. If there are two such numbers, + * then the one that is even is returned. + */ +void +xmlXPathRoundFunction(xmlXPathParserContextPtr ctxt, int nargs) { + double f; + + CHECK_ARITY(1); + CAST_TO_NUMBER; + CHECK_TYPE(XPATH_NUMBER); + + if ((xmlXPathIsNaN(ctxt->value->floatval)) || + (xmlXPathIsInf(ctxt->value->floatval) == 1) || + (xmlXPathIsInf(ctxt->value->floatval) == -1) || + (ctxt->value->floatval == 0.0)) + return; + + f = (double)((int) ctxt->value->floatval); + if (ctxt->value->floatval < 0) { + if (ctxt->value->floatval < f - 0.5) + ctxt->value->floatval = f - 1; + else + ctxt->value->floatval = f; + if (ctxt->value->floatval == 0) + ctxt->value->floatval = xmlXPathNZERO; + } else { + if (ctxt->value->floatval < f + 0.5) + ctxt->value->floatval = f; + else + ctxt->value->floatval = f + 1; + } +} + +/************************************************************************ + * * + * The Parser * + * * + ************************************************************************/ + +/* + * a few forward declarations since we use a recursive call based + * implementation. + */ +static void xmlXPathCompileExpr(xmlXPathParserContextPtr ctxt); +static void xmlXPathCompPredicate(xmlXPathParserContextPtr ctxt, int filter); +static void xmlXPathCompLocationPath(xmlXPathParserContextPtr ctxt); +static void xmlXPathCompRelativeLocationPath(xmlXPathParserContextPtr ctxt); +static xmlChar * xmlXPathParseNameComplex(xmlXPathParserContextPtr ctxt, + int qualified); + +/** + * xmlXPathCurrentChar: + * @ctxt: the XPath parser context + * @cur: pointer to the beginning of the char + * @len: pointer to the length of the char read + * + * The current char value, if using UTF-8 this may actually span multiple + * bytes in the input buffer. + * + * Returns the current char value and its length + */ + +static int +xmlXPathCurrentChar(xmlXPathParserContextPtr ctxt, int *len) { + unsigned char c; + unsigned int val; + const xmlChar *cur; + + if (ctxt == NULL) + return(0); + cur = ctxt->cur; + + /* + * We are supposed to handle UTF8, check it's valid + * From rfc2044: encoding of the Unicode values on UTF-8: + * + * UCS-4 range (hex.) UTF-8 octet sequence (binary) + * 0000 0000-0000 007F 0xxxxxxx + * 0000 0080-0000 07FF 110xxxxx 10xxxxxx + * 0000 0800-0000 FFFF 1110xxxx 10xxxxxx 10xxxxxx + * + * Check for the 0x110000 limit too + */ + c = *cur; + if (c & 0x80) { + if ((cur[1] & 0xc0) != 0x80) + goto encoding_error; + if ((c & 0xe0) == 0xe0) { + + if ((cur[2] & 0xc0) != 0x80) + goto encoding_error; + if ((c & 0xf0) == 0xf0) { + if (((c & 0xf8) != 0xf0) || + ((cur[3] & 0xc0) != 0x80)) + goto encoding_error; + /* 4-byte code */ + *len = 4; + val = (cur[0] & 0x7) << 18; + val |= (cur[1] & 0x3f) << 12; + val |= (cur[2] & 0x3f) << 6; + val |= cur[3] & 0x3f; + } else { + /* 3-byte code */ + *len = 3; + val = (cur[0] & 0xf) << 12; + val |= (cur[1] & 0x3f) << 6; + val |= cur[2] & 0x3f; + } + } else { + /* 2-byte code */ + *len = 2; + val = (cur[0] & 0x1f) << 6; + val |= cur[1] & 0x3f; + } + if (!IS_CHAR(val)) { + XP_ERROR0(XPATH_INVALID_CHAR_ERROR); + } + return(val); + } else { + /* 1-byte code */ + *len = 1; + return((int) *cur); + } +encoding_error: + /* + * If we detect an UTF8 error that probably means that the + * input encoding didn't get properly advertised in the + * declaration header. Report the error and switch the encoding + * to ISO-Latin-1 (if you don't like this policy, just declare the + * encoding !) + */ + *len = 0; + XP_ERROR0(XPATH_ENCODING_ERROR); +} + +/** + * xmlXPathParseNCName: + * @ctxt: the XPath Parser context + * + * parse an XML namespace non qualified name. + * + * [NS 3] NCName ::= (Letter | '_') (NCNameChar)* + * + * [NS 4] NCNameChar ::= Letter | Digit | '.' | '-' | '_' | + * CombiningChar | Extender + * + * Returns the namespace name or NULL + */ + +xmlChar * +xmlXPathParseNCName(xmlXPathParserContextPtr ctxt) { + const xmlChar *in; + xmlChar *ret; + int count = 0; + + /* + * Accelerator for simple ASCII names + */ + in = ctxt->cur; + if (((*in >= 0x61) && (*in <= 0x7A)) || + ((*in >= 0x41) && (*in <= 0x5A)) || + (*in == '_')) { + in++; + while (((*in >= 0x61) && (*in <= 0x7A)) || + ((*in >= 0x41) && (*in <= 0x5A)) || + ((*in >= 0x30) && (*in <= 0x39)) || + (*in == '_') || (*in == '.') || + (*in == '-')) + in++; + if ((*in == ' ') || (*in == '>') || (*in == '/') || + (*in == '[') || (*in == ']') || (*in == ':') || + (*in == '@') || (*in == '*')) { + count = in - ctxt->cur; + if (count == 0) + return(NULL); + ret = xmlStrndup(ctxt->cur, count); + if(OOM_FLAG) return(NULL); + ctxt->cur = in; + return(ret); + } + } + return(xmlXPathParseNameComplex(ctxt, 0)); +} + + +/** + * xmlXPathParseQName: + * @ctxt: the XPath Parser context + * @prefix: a xmlChar ** + * + * parse an XML qualified name + * + * [NS 5] QName ::= (Prefix ':')? LocalPart + * + * [NS 6] Prefix ::= NCName + * + * [NS 7] LocalPart ::= NCName + * + * Returns the function returns the local part, and prefix is updated + * to get the Prefix if any. + */ + +static xmlChar * +xmlXPathParseQName(xmlXPathParserContextPtr ctxt, xmlChar **prefix) { + xmlChar *ret = NULL; + + *prefix = NULL; + ret = xmlXPathParseNCName(ctxt); + if (CUR == ':') { + *prefix = ret; + NEXT; + ret = xmlXPathParseNCName(ctxt); + } + return(ret); +} + +/** + * xmlXPathParseName: + * @ctxt: the XPath Parser context + * + * parse an XML name + * + * [4] NameChar ::= Letter | Digit | '.' | '-' | '_' | ':' | + * CombiningChar | Extender + * + * [5] Name ::= (Letter | '_' | ':') (NameChar)* + * + * Returns the namespace name or NULL + */ + +xmlChar * +xmlXPathParseName(xmlXPathParserContextPtr ctxt) { + const xmlChar *in; + xmlChar *ret; + int count = 0; + + /* + * Accelerator for simple ASCII names + */ + in = ctxt->cur; + if (((*in >= 0x61) && (*in <= 0x7A)) || + ((*in >= 0x41) && (*in <= 0x5A)) || + (*in == '_') || (*in == ':')) { + in++; + while (((*in >= 0x61) && (*in <= 0x7A)) || + ((*in >= 0x41) && (*in <= 0x5A)) || + ((*in >= 0x30) && (*in <= 0x39)) || + (*in == '_') || (*in == '-') || + (*in == ':') || (*in == '.')) + in++; + if ((*in > 0) && (*in < 0x80)) { + count = in - ctxt->cur; + ret = xmlStrndup(ctxt->cur, count); + ctxt->cur = in; + return(ret); + } + } + return(xmlXPathParseNameComplex(ctxt, 1)); +} + +/* + * OOM: possible --> check OOM flag + */ +static xmlChar* +xmlXPathParseNameComplex(xmlXPathParserContextPtr ctxt, int qualified) +{ + xmlChar buf[XML_MAX_NAMELEN + 5]; + int len = 0, l; // TODO: rename 'l' variable + int c; + + /* + * Handler for more complex cases + */ + c = CUR_CHAR(l); + if ((c == ' ') || (c == '>') || (c == '/') || /* accelerators */ + (c == '[') || (c == ']') || (c == '@') || /* accelerators */ + (c == '*') || /* accelerators */ + (!IS_LETTER(c) && + (c != '_') && + qualified && + (c != ':') + ) + ) + { + return(NULL); + } + + while((c != ' ') && (c != '>') && (c != '/') + && /* test bigname.xml */ + ( + IS_LETTER(c) || + IS_DIGIT(c) || + (c == '.') || + (c == '-') || + (c == '_') || + (qualified && (c == ':')) || + IS_COMBINING(c) || + IS_EXTENDER(c) + ) + ) + { + COPY_BUF(l,buf,len,c); + NEXTL(l); + c = CUR_CHAR(l); + if (len >= XML_MAX_NAMELEN) + { + /* + * Okay someone managed to make a huge name, so he's ready to pay + * for the processing speed. + */ + xmlChar* buffer; + int max = len * 2; + + buffer = (xmlChar*) xmlMallocAtomic(max * sizeof(xmlChar)); + if (!buffer) { + XP_ERROR0(XPATH_MEMORY_ERROR); + } + memcpy(buffer, buf, len); + while ((IS_LETTER(c)) || (IS_DIGIT(c)) || /* test bigname.xml */ + (c == '.') || (c == '-') || + (c == '_') || ((qualified) && (c == ':')) || + (IS_COMBINING(c)) || + (IS_EXTENDER(c))) + { + if (len + 10 > max) + { + xmlChar* tmp; + max *= 2; + // DONE: Fix xmlRealloc + tmp = (xmlChar*) xmlRealloc(buffer, max * sizeof(xmlChar)); + if (!tmp) { + xmlFree(buffer); + XP_ERROR0(XPATH_MEMORY_ERROR); + } + buffer = tmp; + } + COPY_BUF(l,buffer,len,c); + NEXTL(l); + c = CUR_CHAR(l); + } + buffer[len] = 0; + return(buffer); + } + } + if (len == 0) + return(NULL); + return(xmlStrndup(buf, len)); +} + +#define MAX_FRAC 20 + +/* + * These are used as divisors for the fractional part of a number. + * Since the table includes 1.0 (representing '0' fractional digits), + * it must be dimensioned at MAX_FRAC+1 (bug 133921) + */ +static const double my_pow10[MAX_FRAC+1] = { + 1.0, 10.0, 100.0, 1000.0, 10000.0, + 100000.0, 1000000.0, 10000000.0, 100000000.0, 1000000000.0, + 10000000000.0, 100000000000.0, 1000000000000.0, 10000000000000.0, + 100000000000000.0, + 1000000000000000.0, 10000000000000000.0, 100000000000000000.0, + 1000000000000000000.0, 10000000000000000000.0, 100000000000000000000.0 +}; + + +/** + * xmlXPathStringEvalNumber: + * @str: A string to scan + * + * [30a] Float ::= Number ('e' Digits?)? + * + * [30] Number ::= Digits ('.' Digits?)? + * | '.' Digits + * [31] Digits ::= [0-9]+ + * + * Compile a Number in the string + * In complement of the Number expression, this function also handles + * negative values : '-' Number. + * + * Returns the double value. + * + * OOM: never + */ +double +xmlXPathStringEvalNumber(const xmlChar *str) { + const xmlChar *cur = str; + double ret; + int ok = 0; + int isneg = 0; + int exponent = 0; + int is_exponent_negative = 0; +#ifdef __GNUC__ + unsigned long tmp = 0; + double temp; +#endif + if (cur == NULL) + return(0); + // + while (IS_BLANK_CH(*cur)) + { + cur++; + } + + if ((*cur != '.') && + ((*cur < '0') || (*cur > '9')) && + (*cur != '-')) + { + return(xmlXPathNAN); + } + if (*cur == '-') { + isneg = 1; + cur++; + } + +#ifdef __GNUC__ + /* + * tmp/temp is a workaround against a gcc compiler bug + * http://veillard.com/gcc.bug + */ + ret = 0; + while ((*cur >= '0') && (*cur <= '9')) + { + ret = ret * 10; + tmp = (*cur - '0'); + ok = 1; + cur++; + temp = (double) tmp; + ret = ret + temp; + } +#else + ret = 0; + while ((*cur >= '0') && (*cur <= '9')) + { + ret = ret * 10 + (*cur - '0'); + ok = 1; + cur++; + } +#endif + + if (*cur == '.') + { + int v, frac = 0; + double fraction = 0; + + cur++; + if (((*cur < '0') || (*cur > '9')) && (!ok)) + { + return(xmlXPathNAN); + } + while (((*cur >= '0') && (*cur <= '9')) && (frac < MAX_FRAC)) + { + v = (*cur - '0'); + fraction = fraction * 10 + v; + frac = frac + 1; + cur++; + } + fraction /= my_pow10[frac]; + ret = ret + fraction; + while ((*cur >= '0') && (*cur <= '9')) + { + cur++; + } + } + if ((*cur == 'e') || (*cur == 'E')) + { + cur++; + if (*cur == '-') + { + is_exponent_negative = 1; + cur++; + } + while ((*cur >= '0') && (*cur <= '9')) + { + exponent = exponent * 10 + (*cur - '0'); + cur++; + } + } + while (IS_BLANK_CH(*cur)) + { + cur++; + } + if (*cur != 0) + return(xmlXPathNAN); + if (isneg) + ret = -ret; + if (is_exponent_negative) + exponent = -exponent; + // + ret *= pow(10.0, (double)exponent); + return(ret); +} + +/** + * xmlXPathCompNumber: + * @ctxt: the XPath Parser context + * + * [30] Number ::= Digits ('.' Digits?)? + * | '.' Digits + * [31] Digits ::= [0-9]+ + * + * Compile a Number, then push it on the stack + * + */ +static void +xmlXPathCompNumber(xmlXPathParserContextPtr ctxt) +{ + double ret = 0.0; + double mult = 1; + int ok = 0; + int exponent = 0; + int is_exponent_negative = 0; +#ifdef __GNUC__ + unsigned long tmp = 0; + double temp; +#endif + + CHECK_ERROR; + if ((CUR != '.') && ((CUR < '0') || (CUR > '9'))) { + XP_ERROR(XPATH_NUMBER_ERROR); + } +#ifdef __GNUC__ + /* + * tmp/temp is a workaround against a gcc compiler bug + * http://veillard.com/gcc.bug + */ + ret = 0; + while ((CUR >= '0') && (CUR <= '9')) { + ret = ret * 10; + tmp = (CUR - '0'); + ok = 1; + NEXT; + temp = (double) tmp; + ret = ret + temp; + } +#else + ret = 0; + while ((CUR >= '0') && (CUR <= '9')) { + ret = ret * 10 + (CUR - '0'); + ok = 1; + NEXT; + } +#endif + if (CUR == '.') { + NEXT; + if (((CUR < '0') || (CUR > '9')) && (!ok)) { + XP_ERROR(XPATH_NUMBER_ERROR); + } + while ((CUR >= '0') && (CUR <= '9')) { + mult /= 10; + ret = ret + (CUR - '0') * mult; + NEXT; + } + } + if ((CUR == 'e') || (CUR == 'E')) { + NEXT; + if (CUR == '-') { + is_exponent_negative = 1; + NEXT; + } + while ((CUR >= '0') && (CUR <= '9')) { + exponent = exponent * 10 + (CUR - '0'); + NEXT; + } + if (is_exponent_negative) + exponent = -exponent; + ret *= pow(10.0, (double) exponent); + } + PUSH_LONG_EXPR(XPATH_OP_VALUE, XPATH_NUMBER, 0, 0, + xmlXPathNewFloat(ret), NULL); +} + +/** + * xmlXPathParseLiteral: + * @ctxt: the XPath Parser context + * + * Parse a Literal + * + * [29] Literal ::= '"' [^"]* '"' + * | "'" [^']* "'" + * + * Returns the value found or NULL in case of error + */ +static xmlChar * +xmlXPathParseLiteral(xmlXPathParserContextPtr ctxt) { + const xmlChar *q; + xmlChar *ret = NULL; + + if (CUR == '"') { + NEXT; + q = CUR_PTR; + while ((IS_CHAR_CH(CUR)) && (CUR != '"')) + NEXT; + if (!IS_CHAR_CH(CUR)) { + XP_ERROR0(XPATH_UNFINISHED_LITERAL_ERROR); + } else { + ret = xmlStrndup(q, CUR_PTR - q); + NEXT; + } + } else if (CUR == '\'') { + NEXT; + q = CUR_PTR; + while ((IS_CHAR_CH(CUR)) && (CUR != '\'')) + NEXT; + if (!IS_CHAR_CH(CUR)) { + XP_ERROR0(XPATH_UNFINISHED_LITERAL_ERROR); + } else { + ret = xmlStrndup(q, CUR_PTR - q); + NEXT; + } + } else { + XP_ERROR0(XPATH_START_LITERAL_ERROR); + } + return(ret); +} + +/** + * xmlXPathCompLiteral: + * @ctxt: the XPath Parser context + * + * Parse a Literal and push it on the stack. + * + * [29] Literal ::= '"' [^"]* '"' + * | "'" [^']* "'" + * + * TODO: xmlXPathCompLiteral memory allocation could be improved. + */ +static void +xmlXPathCompLiteral(xmlXPathParserContextPtr ctxt) { + const xmlChar *q; + xmlChar *ret = NULL; + + if (CUR == '"') { + NEXT; + q = CUR_PTR; + while ((IS_CHAR_CH(CUR)) && (CUR != '"')) + NEXT; + if (!IS_CHAR_CH(CUR)) { + XP_ERROR(XPATH_UNFINISHED_LITERAL_ERROR); + } else { + ret = xmlStrndup(q, CUR_PTR - q); + NEXT; + } + } else if (CUR == '\'') { + NEXT; + q = CUR_PTR; + while ((IS_CHAR_CH(CUR)) && (CUR != '\'')) + NEXT; + if (!IS_CHAR_CH(CUR)) { + XP_ERROR(XPATH_UNFINISHED_LITERAL_ERROR); + } else { + ret = xmlStrndup(q, CUR_PTR - q); + NEXT; + } + } else { + XP_ERROR(XPATH_START_LITERAL_ERROR); + } + if (ret == NULL) return; + PUSH_LONG_EXPR(XPATH_OP_VALUE, XPATH_STRING, 0, 0, + xmlXPathNewString(ret), NULL); + xmlFree(ret); +} + +/** + * xmlXPathCompVariableReference: + * @ctxt: the XPath Parser context + * + * Parse a VariableReference, evaluate it and push it on the stack. + * + * The variable bindings consist of a mapping from variable names + * to variable values. The value of a variable is an object, which can be + * of any of the types that are possible for the value of an expression, + * and may also be of additional types not specified here. + * + * Early evaluation is possible since: + * The variable bindings [...] used to evaluate a subexpression are + * always the same as those used to evaluate the containing expression. + * + * [36] VariableReference ::= '$' QName + */ +static void +xmlXPathCompVariableReference(xmlXPathParserContextPtr ctxt) { + xmlChar *name; + xmlChar *prefix; + + SKIP_BLANKS; + if (CUR != '$') { + XP_ERROR(XPATH_VARIABLE_REF_ERROR); + } + NEXT; + name = xmlXPathParseQName(ctxt, &prefix); + if (name == NULL) { + XP_ERROR(XPATH_VARIABLE_REF_ERROR); + } + ctxt->comp->last = -1; + PUSH_LONG_EXPR(XPATH_OP_VARIABLE, 0, 0, 0, + name, prefix); + SKIP_BLANKS; +} + +/** + * xmlXPathIsNodeType: + * @name: a name string + * + * Is the name given a NodeType one. + * + * [38] NodeType ::= 'comment' + * | 'text' + * | 'processing-instruction' + * | 'node' + * + * Returns 1 if true 0 otherwise + */ +int +xmlXPathIsNodeType(const xmlChar *name) { + if (name == NULL) + return(0); + + if (xmlStrEqual(name, BAD_CAST "node")) + return(1); + if (xmlStrEqual(name, BAD_CAST "text")) + return(1); + if (xmlStrEqual(name, BAD_CAST "comment")) + return(1); + if (xmlStrEqual(name, BAD_CAST "processing-instruction")) + return(1); + return(0); +} + +/** + * xmlXPathCompFunctionCall: + * @ctxt: the XPath Parser context + * + * [16] FunctionCall ::= FunctionName '(' ( Argument ( ',' Argument)*)? ')' + * [17] Argument ::= Expr + * + * Compile a function call, the evaluation of all arguments are + * pushed on the stack + */ +static void +xmlXPathCompFunctionCall(xmlXPathParserContextPtr ctxt) { + xmlChar *name; + xmlChar *prefix; + int nbargs = 0; + + name = xmlXPathParseQName(ctxt, &prefix); + if (name == NULL) { + XP_ERROR(XPATH_EXPR_ERROR); + } + SKIP_BLANKS; +#ifdef DEBUG_EXPR + if (prefix == NULL) + xmlGenericError(xmlGenericErrorContext, "Calling function %s\n", + name); + else + xmlGenericError(xmlGenericErrorContext, "Calling function %s:%s\n", + prefix, name); +#endif + + if (CUR != '(') { + XP_ERROR(XPATH_EXPR_ERROR); + } + NEXT; + SKIP_BLANKS; + + ctxt->comp->last = -1; + if (CUR != ')') { + while (CUR != 0) { + int op1 = ctxt->comp->last; + ctxt->comp->last = -1; + xmlXPathCompileExpr(ctxt); + if(OOM_FLAG) + { + xmlFree(name); + return; + } + CHECK_ERROR; + PUSH_BINARY_EXPR(XPATH_OP_ARG, op1, ctxt->comp->last, 0, 0); + nbargs++; + if (CUR == ')') break; + if (CUR != ',') { + XP_ERROR(XPATH_EXPR_ERROR); + } + NEXT; + SKIP_BLANKS; + } + } + if ( PUSH_LONG_EXPR(XPATH_OP_FUNCTION, nbargs, 0, 0, name, prefix) == -1) + goto Err; + NEXT; + SKIP_BLANKS; + return; +Err: + if(name) + xmlFree(name); + if(prefix) + xmlFree(prefix); +} + +/** + * xmlXPathCompPrimaryExpr: + * @ctxt: the XPath Parser context + * + * [15] PrimaryExpr ::= VariableReference + * | '(' Expr ')' + * | Literal + * | Number + * | FunctionCall + * + * Compile a primary expression. + */ +static void +xmlXPathCompPrimaryExpr(xmlXPathParserContextPtr ctxt) { + SKIP_BLANKS; + if (CUR == '$') xmlXPathCompVariableReference(ctxt); + else if (CUR == '(') { + NEXT; + SKIP_BLANKS; + xmlXPathCompileExpr(ctxt); + CHECK_ERROR; + if (CUR != ')') { + XP_ERROR(XPATH_EXPR_ERROR); + } + NEXT; + SKIP_BLANKS; + } else if (IS_DIGIT_CH(CUR) || (CUR == '.' && IS_DIGIT_CH(NXT(1)))) { + xmlXPathCompNumber(ctxt); + } else if ((CUR == '\'') || (CUR == '"')) { + xmlXPathCompLiteral(ctxt); + } else { + xmlXPathCompFunctionCall(ctxt); + } + SKIP_BLANKS; +} + +/** + * xmlXPathCompFilterExpr: + * @ctxt: the XPath Parser context + * + * [20] FilterExpr ::= PrimaryExpr + * | FilterExpr Predicate + * + * Compile a filter expression. + * Square brackets are used to filter expressions in the same way that + * they are used in location paths. It is an error if the expression to + * be filtered does not evaluate to a node-set. The context node list + * used for evaluating the expression in square brackets is the node-set + * to be filtered listed in document order. + */ + +static void +xmlXPathCompFilterExpr(xmlXPathParserContextPtr ctxt) { + xmlXPathCompPrimaryExpr(ctxt); + CHECK_ERROR; + SKIP_BLANKS; + + while (CUR == '[') { + xmlXPathCompPredicate(ctxt, 1); + SKIP_BLANKS; + } + + +} + +/** + * xmlXPathScanName: + * @ctxt: the XPath Parser context + * + * Trickery: parse an XML name but without consuming the input flow + * Needed to avoid insanity in the parser state. + * + * [4] NameChar ::= Letter | Digit | '.' | '-' | '_' | ':' | + * CombiningChar | Extender + * + * [5] Name ::= (Letter | '_' | ':') (NameChar)* + * + * [6] Names ::= Name (S Name)* + * + * Returns the Name parsed or NULL + * + * OOM: possible --> sets OOM when NULL is return + */ + +static xmlChar* +xmlXPathScanName(xmlXPathParserContextPtr ctxt) { + xmlChar buf[XML_MAX_NAMELEN]; + int len = 0; + + SKIP_BLANKS; + if (!IS_LETTER_CH(CUR) && + (CUR != '_') && + (CUR != ':')) + { + return(NULL); + } + // TODO: OPTIMIZE: Repeated while conditions: NXT(len) + while ((IS_LETTER_CH(NXT(len))) || + (IS_DIGIT_CH(NXT(len))) || + (NXT(len) == '.') || + (NXT(len) == '-') || + (NXT(len) == '_') || + (NXT(len) == ':') || + (IS_COMBINING_CH(NXT(len))) || + (IS_EXTENDER_CH(NXT(len)))) + { + buf[len] = NXT(len); + len++; + if (len >= XML_MAX_NAMELEN) // TODO: Make a configurable parameter + { + xmlGenericError(xmlGenericErrorContext, EMBED_ERRTXT("xmlScanName: reached XML_MAX_NAMELEN limit\n")); + while ( + (IS_LETTER_CH(NXT(len))) || + (IS_DIGIT_CH(NXT(len))) || + (NXT(len) == '.') || + (NXT(len) == '-') || + (NXT(len) == '_') || + (NXT(len) == ':') || + (IS_COMBINING_CH(NXT(len))) || + (IS_EXTENDER_CH(NXT(len)))) + { + len++; + } + break; // while + } + } + return(xmlStrndup(buf, len)); // may cause OOM +} + +/** + * xmlXPathCompPathExpr: + * @ctxt: the XPath Parser context + * + * [19] PathExpr ::= LocationPath + * | FilterExpr + * | FilterExpr '/' RelativeLocationPath + * | FilterExpr '//' RelativeLocationPath + * + * Compile a path expression. + * The / operator and // operators combine an arbitrary expression + * and a relative location path. It is an error if the expression + * does not evaluate to a node-set. + * The / operator does composition in the same way as when / is + * used in a location path. As in location paths, // is short for + * /descendant-or-self::node()/. + * + * OOM: + */ + +static void +xmlXPathCompPathExpr(xmlXPathParserContextPtr ctxt) { + int lc = 1; /* Should we branch to LocationPath ? */ + xmlChar *name = NULL; /* we may have to preparse a name to find out */ + + SKIP_BLANKS; + if ((CUR == '$') || (CUR == '(') || (IS_DIGIT_CH(CUR)) || + (CUR == '\'') || (CUR == '"') || (CUR == '.' && IS_DIGIT_CH(NXT(1)))) + { + lc = 0; + } else if (CUR == '*') { + /* relative or absolute location path */ + lc = 1; + } else if (CUR == '/') { + /* relative or absolute location path */ + lc = 1; + } else if (CUR == '@') { + /* relative abbreviated attribute location path */ + lc = 1; + } else if (CUR == '.') { + /* relative abbreviated attribute location path */ + lc = 1; + } else { + /* + * Problem is finding if we have a name here whether it's: + * - a nodetype + * - a function call in which case it's followed by '(' + * - an axis in which case it's followed by ':' + * - a element name + * We do an a priori analysis here rather than having to + * maintain parsed token content through the recursive function + * calls. This looks uglier but makes the code easier to + * read/write/debug. + */ + SKIP_BLANKS; + name = xmlXPathScanName(ctxt); + if(OOM_FLAG) return; + if (name && (xmlStrstr(name, (xmlChar *) "::") != NULL)) { +#ifdef DEBUG_STEP + xmlGenericError(xmlGenericErrorContext, "PathExpr: Axis\n"); +#endif + lc = 1; + xmlFree(name); + } else if (name != NULL) { + int len =xmlStrlen(name); + + + while (NXT(len) != 0) { + if (NXT(len) == '/') { + /* element name */ +#ifdef DEBUG_STEP + xmlGenericError(xmlGenericErrorContext, "PathExpr: AbbrRelLocation\n"); +#endif + lc = 1; + break; + } else if (IS_BLANK_CH(NXT(len))) { + /* ignore blanks */ + ; + } else if (NXT(len) == ':') { +#ifdef DEBUG_STEP + xmlGenericError(xmlGenericErrorContext, "PathExpr: AbbrRelLocation\n"); +#endif + lc = 1; + break; + } else if ((NXT(len) == '(')) { + /* Note Type or Function */ + if (xmlXPathIsNodeType(name)) { +#ifdef DEBUG_STEP + xmlGenericError(xmlGenericErrorContext, "PathExpr: Type search\n"); +#endif + lc = 1; + } else { +#ifdef DEBUG_STEP + xmlGenericError(xmlGenericErrorContext, "PathExpr: function call\n"); +#endif + lc = 0; + } + break; + } else if ((NXT(len) == '[')) { + /* element name */ +#ifdef DEBUG_STEP + xmlGenericError(xmlGenericErrorContext, "PathExpr: AbbrRelLocation\n"); +#endif + lc = 1; + break; + } else if ((NXT(len) == '<') || + (NXT(len) == '>') || + (NXT(len) == '=')) + { + lc = 1; + break; + } else { + lc = 1; + break; + } + len++; + } + if (NXT(len) == 0) { +#ifdef DEBUG_STEP + xmlGenericError(xmlGenericErrorContext, "PathExpr: AbbrRelLocation\n"); +#endif + /* element name */ + lc = 1; + } + xmlFree(name); + } else { + /* make sure all cases are covered explicitly */ + XP_ERROR(XPATH_EXPR_ERROR); + } + } + + if (lc) { + if (CUR == '/') { + PUSH_LEAVE_EXPR(XPATH_OP_ROOT, 0, 0); + } else { + PUSH_LEAVE_EXPR(XPATH_OP_NODE, 0, 0); + } + xmlXPathCompLocationPath(ctxt); + if(OOM_FLAG) return; + } else { + xmlXPathCompFilterExpr(ctxt); + CHECK_ERROR; + if ((CUR == '/') && (NXT(1) == '/')) + { + SKIP(2); + SKIP_BLANKS; + + PUSH_LONG_EXPR( + XPATH_OP_COLLECT, + AXIS_DESCENDANT_OR_SELF, + NODE_TEST_TYPE, + NODE_TYPE_NODE, + NULL, + NULL); + + PUSH_UNARY_EXPR(XPATH_OP_RESET, ctxt->comp->last, 1, 0); + + xmlXPathCompRelativeLocationPath(ctxt); + } else if (CUR == '/') { + xmlXPathCompRelativeLocationPath(ctxt); + } + } + SKIP_BLANKS; +} + +/** + * xmlXPathCompUnionExpr: + * @ctxt: the XPath Parser context + * + * [18] UnionExpr ::= PathExpr + * | UnionExpr '|' PathExpr + * + * Compile an union expression. + * + * OOM: + */ + +static void +xmlXPathCompUnionExpr(xmlXPathParserContextPtr ctxt) { + xmlXPathCompPathExpr(ctxt); + if(OOM_FLAG) return; + CHECK_ERROR; + SKIP_BLANKS; + while (CUR == '|') { + int op1 = ctxt->comp->last; + PUSH_LEAVE_EXPR(XPATH_OP_NODE, 0, 0); + + NEXT; + SKIP_BLANKS; + xmlXPathCompPathExpr(ctxt); + + PUSH_BINARY_EXPR(XPATH_OP_UNION, op1, ctxt->comp->last, 0, 0); + + SKIP_BLANKS; + } +} + +/** + * xmlXPathCompUnaryExpr: + * @ctxt: the XPath Parser context + * + * [27] UnaryExpr ::= UnionExpr + * | '-' UnaryExpr + * + * Compile an unary expression. + * + * OOM: + */ + +static void +xmlXPathCompUnaryExpr(xmlXPathParserContextPtr ctxt) { + int minus = 0; + int found = 0; + + SKIP_BLANKS; + while (CUR == '-') { + minus = 1 - minus; + found = 1; + NEXT; + SKIP_BLANKS; + } + + xmlXPathCompUnionExpr(ctxt); + if(OOM_FLAG) return; + CHECK_ERROR; + if (found) { + if (minus) + PUSH_UNARY_EXPR(XPATH_OP_PLUS, ctxt->comp->last, 2, 0); + else + PUSH_UNARY_EXPR(XPATH_OP_PLUS, ctxt->comp->last, 3, 0); + } +} + +/** + * xmlXPathCompMultiplicativeExpr: + * @ctxt: the XPath Parser context + * + * [26] MultiplicativeExpr ::= UnaryExpr + * | MultiplicativeExpr MultiplyOperator UnaryExpr + * | MultiplicativeExpr 'div' UnaryExpr + * | MultiplicativeExpr 'mod' UnaryExpr + * [34] MultiplyOperator ::= '*' + * + * Compile an Additive expression. + * + * OOM: + */ + +static void +xmlXPathCompMultiplicativeExpr(xmlXPathParserContextPtr ctxt) { + xmlXPathCompUnaryExpr(ctxt); + if(OOM_FLAG) return; + CHECK_ERROR; + SKIP_BLANKS; + while ((CUR == '*') || + ((CUR == 'd') && (NXT(1) == 'i') && (NXT(2) == 'v')) || + ((CUR == 'm') && (NXT(1) == 'o') && (NXT(2) == 'd'))) { + int op = -1; + int op1 = ctxt->comp->last; + + if (CUR == '*') { + op = 0; + NEXT; + } else if (CUR == 'd') { + op = 1; + SKIP(3); + } else if (CUR == 'm') { + op = 2; + SKIP(3); + } + SKIP_BLANKS; + xmlXPathCompUnaryExpr(ctxt); + CHECK_ERROR; + PUSH_BINARY_EXPR(XPATH_OP_MULT, op1, ctxt->comp->last, op, 0); + SKIP_BLANKS; + } +} + +/** + * xmlXPathCompAdditiveExpr: + * @ctxt: the XPath Parser context + * + * [25] AdditiveExpr ::= MultiplicativeExpr + * | AdditiveExpr '+' MultiplicativeExpr + * | AdditiveExpr '-' MultiplicativeExpr + * + * Compile an Additive expression. + * + * OOM: + */ + +static void +xmlXPathCompAdditiveExpr(xmlXPathParserContextPtr ctxt) { + + xmlXPathCompMultiplicativeExpr(ctxt); + if(OOM_FLAG) return; + CHECK_ERROR; + SKIP_BLANKS; + while ((CUR == '+') || (CUR == '-')) { + int plus; + int op1 = ctxt->comp->last; + + if (CUR == '+') plus = 1; + else plus = 0; + NEXT; + SKIP_BLANKS; + xmlXPathCompMultiplicativeExpr(ctxt); + CHECK_ERROR; + PUSH_BINARY_EXPR(XPATH_OP_PLUS, op1, ctxt->comp->last, plus, 0); + SKIP_BLANKS; + } +} + +/** + * xmlXPathCompRelationalExpr: + * @ctxt: the XPath Parser context + * + * [24] RelationalExpr ::= AdditiveExpr + * | RelationalExpr '<' AdditiveExpr + * | RelationalExpr '>' AdditiveExpr + * | RelationalExpr '<=' AdditiveExpr + * | RelationalExpr '>=' AdditiveExpr + * + * A <= B > C is allowed ? Answer from James, yes with + * (AdditiveExpr <= AdditiveExpr) > AdditiveExpr + * which is basically what got implemented. + * + * Compile a Relational expression, then push the result + * on the stack + * + * OOM: + */ + +static void +xmlXPathCompRelationalExpr(xmlXPathParserContextPtr ctxt) { + xmlChar ch; + int* last; + // XML ENGINE: Changes/optimization were applied here + xmlXPathCompAdditiveExpr(ctxt); + if(OOM_FLAG) return; + CHECK_ERROR; + SKIP_BLANKS; + last = &(ctxt->comp->last); + // NOTE: this loop allows expressions like A > B <= C < D .. etc. + // which will be evaluated in a way that may be unexpected: + // e.g. the example above is evaluated as + // ((A > B) <= C) < D with boolean results within parentheses + // converted to 1 or 0 (from 'true' and 'false') + // TODO: Check how well this confoms to the spec + for(;;) + { + ch = *ctxt->cur; + if (ch == '<' || ch == '>') + { + int op1 = *last; + int strict = (*(++(ctxt->cur)) == '=') ? 0 : 1; // evaluate 'strict' and NEXT + if (!strict) + ctxt->cur++; // NEXT again if '=' + + SKIP_BLANKS; + xmlXPathCompAdditiveExpr(ctxt); + CHECK_ERROR; + PUSH_BINARY_EXPR( + XPATH_OP_CMP, + op1, + *last, + (ch == '<') & 1, + strict); + SKIP_BLANKS; + } + else + return; + } // for(;;) +} + +/** + * xmlXPathCompEqualityExpr: + * @ctxt: the XPath Parser context + * + * [23] EqualityExpr ::= RelationalExpr + * | EqualityExpr '=' RelationalExpr + * | EqualityExpr '!=' RelationalExpr + * + * A != B != C is allowed ? Answer from James, yes with + * (RelationalExpr = RelationalExpr) = RelationalExpr + * (RelationalExpr != RelationalExpr) != RelationalExpr + * which is basically what got implemented. + * + * Compile an Equality expression. + * + * OOM: + */ +static void +xmlXPathCompEqualityExpr(xmlXPathParserContextPtr ctxt) { + xmlXPathCompRelationalExpr(ctxt); + if(OOM_FLAG) return; + CHECK_ERROR; + SKIP_BLANKS; + while ((CUR == '=') || ((CUR == '!') && (NXT(1) == '='))) { + int eq; + int op1 = ctxt->comp->last; + + if (CUR == '=') eq = 1; + else eq = 0; + NEXT; + if (!eq) NEXT; + SKIP_BLANKS; + xmlXPathCompRelationalExpr(ctxt); + CHECK_ERROR; + PUSH_BINARY_EXPR(XPATH_OP_EQUAL, op1, ctxt->comp->last, eq, 0); + SKIP_BLANKS; + } +} + +/** + * xmlXPathCompAndExpr: + * @ctxt: the XPath Parser context + * + * [22] AndExpr ::= EqualityExpr + * | AndExpr 'and' EqualityExpr + * + * Compile an AND expression. + * + * OOM: + */ +static void +xmlXPathCompAndExpr(xmlXPathParserContextPtr ctxt) { + xmlXPathCompEqualityExpr(ctxt); + if(OOM_FLAG) return; + CHECK_ERROR; + SKIP_BLANKS; + while ((CUR == 'a') && (NXT(1) == 'n') && (NXT(2) == 'd')) { + int op1 = ctxt->comp->last; + SKIP(3); + SKIP_BLANKS; + xmlXPathCompEqualityExpr(ctxt); + CHECK_ERROR; + PUSH_BINARY_EXPR(XPATH_OP_AND, op1, ctxt->comp->last, 0, 0); + SKIP_BLANKS; + } +} + +#define XMLENGINE_OPTIMIZE_COMP_EXPR_STEPS +/** + * xmlXPathCompileExpr: + * @ctxt: the XPath Parser context + * + * [14] Expr ::= OrExpr + * [21] OrExpr ::= AndExpr + * | OrExpr 'or' AndExpr + * + * Parse and compile an expression + * + * OOM: possible --> check OOM flag //// + */ +static void +xmlXPathCompileExpr(xmlXPathParserContextPtr ctxt) +{ + xmlXPathCompAndExpr(ctxt); + CHECK_ERROR; + if(OOM_FLAG){ + XP_ERROR(XPATH_MEMORY_ERROR); + } + SKIP_BLANKS; + while ((CUR == 'o') && (NXT(1) == 'r')) { + int op1 = ctxt->comp->last; + SKIP(2); + SKIP_BLANKS; + xmlXPathCompAndExpr(ctxt); + CHECK_ERROR; + PUSH_BINARY_EXPR(XPATH_OP_OR, op1, ctxt->comp->last, 0, 0); + op1 = ctxt->comp->nbStep; + SKIP_BLANKS; + } + if (ctxt->comp->steps[ctxt->comp->last].op != XPATH_OP_VALUE) { + /* more ops could be optimized too */ + PUSH_UNARY_EXPR(XPATH_OP_SORT, ctxt->comp->last , 0, 0); + } + +#ifdef XMLENGINE_OPTIMIZE_COMP_EXPR_STEPS + // Free unused memory in the tail of ctxt->comp->steps array + { + xmlXPathStepOp* tmp; + // DONE: OPTIMIZE: free the rest of preallocated step table + // This is a exeprimental code in XML Engine + // DONE: Fix xmlRealloc (Note: OOM should not happen since the size is smaller, but...) + tmp = (xmlXPathStepOp*)xmlRealloc(ctxt->comp->steps, sizeof(xmlXPathStepOp) * ctxt->comp->nbStep); + if(tmp) + { + ctxt->comp->steps = tmp; + ctxt->comp->maxStep = ctxt->comp->nbStep; + } + } +#endif + // +} + +/** + * xmlXPathCompPredicate: + * @ctxt: the XPath Parser context + * @filter: act as a filter + * + * [8] Predicate ::= '[' PredicateExpr ']' + * [9] PredicateExpr ::= Expr + * + * Compile a predicate expression + */ +static void +xmlXPathCompPredicate(xmlXPathParserContextPtr ctxt, int filter) { + int op1 = ctxt->comp->last; + + SKIP_BLANKS; + if (CUR != '[') { + XP_ERROR(XPATH_INVALID_PREDICATE_ERROR); + } + NEXT; + SKIP_BLANKS; + + ctxt->comp->last = -1; + xmlXPathCompileExpr(ctxt); + CHECK_ERROR; + + if (CUR != ']') { + XP_ERROR(XPATH_INVALID_PREDICATE_ERROR); + } + + if (filter) + PUSH_BINARY_EXPR(XPATH_OP_FILTER, op1, ctxt->comp->last, 0, 0); + else + PUSH_BINARY_EXPR(XPATH_OP_PREDICATE, op1, ctxt->comp->last, 0, 0); + + NEXT; + SKIP_BLANKS; +} + +/** + * xmlXPathCompNodeTest: + * @ctxt: the XPath Parser context + * @test: pointer to a xmlXPathTestVal + * @type: pointer to a xmlXPathTypeVal + * @prefix: placeholder for a possible name prefix + * + * [7] NodeTest ::= NameTest + * | NodeType '(' ')' + * | 'processing-instruction' '(' Literal ')' + * + * [37] NameTest ::= '*' + * | NCName ':' '*' + * | QName + * [38] NodeType ::= 'comment' + * | 'text' + * | 'processing-instruction' + * | 'node' + * + * Returns the name found and updates @test, @type and @prefix appropriately + */ +static xmlChar * +xmlXPathCompNodeTest(xmlXPathParserContextPtr ctxt, xmlXPathTestVal *test, + xmlXPathTypeVal *type, const xmlChar **prefix, + xmlChar *name) { + int blanks; + + if ((test == NULL) || (type == NULL) || (prefix == NULL)) { + STRANGE; + return(NULL); + } + *type = (xmlXPathTypeVal) 0; + *test = (xmlXPathTestVal) 0; + *prefix = NULL; + SKIP_BLANKS; + + if ((name == NULL) && (CUR == '*')) { + /* + * All elements + */ + NEXT; + *test = NODE_TEST_ALL; + return(NULL); + } + + if (name == NULL) + name = xmlXPathParseNCName(ctxt); + if (name == NULL) { + XP_ERROR0(XPATH_EXPR_ERROR); + } + + blanks = IS_BLANK_CH(CUR); + SKIP_BLANKS; + if (CUR == '(') { + NEXT; + /* + * NodeType or PI search + */ + if (xmlStrEqual(name, BAD_CAST "comment")) + *type = NODE_TYPE_COMMENT; + else if (xmlStrEqual(name, BAD_CAST "node")) + *type = NODE_TYPE_NODE; + else if (xmlStrEqual(name, BAD_CAST "processing-instruction")) + *type = NODE_TYPE_PI; + else if (xmlStrEqual(name, BAD_CAST "text")) + *type = NODE_TYPE_TEXT; + else { + if (name != NULL) + xmlFree(name); + XP_ERROR0(XPATH_EXPR_ERROR); + } + + *test = NODE_TEST_TYPE; + + SKIP_BLANKS; + if (*type == NODE_TYPE_PI) { + /* + * Specific case: search a PI by name. + */ + if (name != NULL) + xmlFree(name); + name = NULL; + if (CUR != ')') { + name = xmlXPathParseLiteral(ctxt); + CHECK_ERROR 0; + *test = NODE_TEST_PI; + SKIP_BLANKS; + } + } + if (CUR != ')') { + if (name != NULL) + xmlFree(name); + XP_ERROR0(XPATH_UNCLOSED_ERROR); + } + NEXT; + return(name); + } + *test = NODE_TEST_NAME; + if ((!blanks) && (CUR == ':')) { + NEXT; + + /* + * Since currently the parser context don't have a + * namespace list associated: + * The namespace name for this prefix can be computed + * only at evaluation time. The compilation is done + * outside of any context. + */ +#if 0 + *prefix = xmlXPathNsLookup(ctxt->context, name); + if (name != NULL) + xmlFree(name); + if (*prefix == NULL) { + XP_ERROR0(XPATH_UNDEF_PREFIX_ERROR); + } +#else + *prefix = name; +#endif + + if (CUR == '*') { + /* + * All elements + */ + NEXT; + *test = NODE_TEST_ALL; + return(NULL); + } + + name = xmlXPathParseNCName(ctxt); + if (name == NULL) { + XP_ERROR0(XPATH_EXPR_ERROR); + } + } + return(name); +} + +/** + * xmlXPathIsAxisName: + * @name: a preparsed name token + * + * [6] AxisName ::= 'ancestor' + * | 'ancestor-or-self' + * | 'attribute' + * | 'child' + * | 'descendant' + * | 'descendant-or-self' + * | 'following' + * | 'following-sibling' + * | 'namespace' + * | 'parent' + * | 'preceding' + * | 'preceding-sibling' + * | 'self' + * + * Returns the axis or 0 + */ +static xmlXPathAxisVal +xmlXPathIsAxisName(const xmlChar *name) { + xmlXPathAxisVal ret = (xmlXPathAxisVal) 0; + switch (name[0]) { + // TODO: OPTIMIZE: Reorder case's optimally + case 'a': + if (xmlStrEqual(name, BAD_CAST "ancestor")) + ret = AXIS_ANCESTOR; + if (xmlStrEqual(name, BAD_CAST "ancestor-or-self")) + ret = AXIS_ANCESTOR_OR_SELF; + if (xmlStrEqual(name, BAD_CAST "attribute")) + ret = AXIS_ATTRIBUTE; + break; + case 'c': + if (xmlStrEqual(name, BAD_CAST "child")) + ret = AXIS_CHILD; + break; + case 'd': + if (xmlStrEqual(name, BAD_CAST "descendant")) + ret = AXIS_DESCENDANT; + if (xmlStrEqual(name, BAD_CAST "descendant-or-self")) + ret = AXIS_DESCENDANT_OR_SELF; + break; + case 'f': + if (xmlStrEqual(name, BAD_CAST "following")) + ret = AXIS_FOLLOWING; + if (xmlStrEqual(name, BAD_CAST "following-sibling")) + ret = AXIS_FOLLOWING_SIBLING; + break; + case 'n': + if (xmlStrEqual(name, BAD_CAST "namespace")) + ret = AXIS_NAMESPACE; + break; + case 'p': + if (xmlStrEqual(name, BAD_CAST "parent")) + ret = AXIS_PARENT; + if (xmlStrEqual(name, BAD_CAST "preceding")) + ret = AXIS_PRECEDING; + if (xmlStrEqual(name, BAD_CAST "preceding-sibling")) + ret = AXIS_PRECEDING_SIBLING; + break; + case 's': + if (xmlStrEqual(name, BAD_CAST "self")) + ret = AXIS_SELF; + break; + } + return(ret); +} + +/** + * xmlXPathCompStep: + * @ctxt: the XPath Parser context + * + * [4] Step ::= AxisSpecifier NodeTest Predicate* + * | AbbreviatedStep + * + * [12] AbbreviatedStep ::= '.' | '..' + * + * [5] AxisSpecifier ::= AxisName '::' + * | AbbreviatedAxisSpecifier + * + * [13] AbbreviatedAxisSpecifier ::= '@'? + * + * Modified for XPtr range support as: + * + * [4xptr] Step ::= AxisSpecifier NodeTest Predicate* + * | AbbreviatedStep + * | 'range-to' '(' Expr ')' Predicate* + * + * Compile one step in a Location Path + * A location step of . is short for self::node(). This is + * particularly useful in conjunction with //. For example, the + * location path .//para is short for + * self::node()/descendant-or-self::node()/child::para + * and so will select all para descendant elements of the context + * node. + * Similarly, a location step of .. is short for parent::node(). + * For example, ../title is short for parent::node()/child::title + * and so will select the title children of the parent of the context + * node. + */ +static void +xmlXPathCompStep(xmlXPathParserContextPtr ctxt) { +#ifdef LIBXML_XPTR_ENABLED + int rangeto = 0; + int op2 = -1; +#endif + + SKIP_BLANKS; + if ((CUR == '.') && (NXT(1) == '.')) { + SKIP(2); + SKIP_BLANKS; + PUSH_LONG_EXPR(XPATH_OP_COLLECT, AXIS_PARENT, + NODE_TEST_TYPE, NODE_TYPE_NODE, NULL, NULL); + } else if (CUR == '.') { + NEXT; + SKIP_BLANKS; + } else { + xmlChar *name = NULL; + const xmlChar *prefix = NULL; + xmlXPathTestVal test; + xmlXPathAxisVal axis = (xmlXPathAxisVal) 0; + xmlXPathTypeVal type; + int op1; + + /* + * The modification needed for XPointer change to the production + */ +#ifdef LIBXML_XPTR_ENABLED + if (ctxt->xptr) { + name = xmlXPathParseNCName(ctxt); + if ((name != NULL) && (xmlStrEqual(name, BAD_CAST "range-to"))) { + op2 = ctxt->comp->last; + xmlFree(name); + SKIP_BLANKS; + if (CUR != '(') { + XP_ERROR(XPATH_EXPR_ERROR); + } + NEXT; + SKIP_BLANKS; + + xmlXPathCompileExpr(ctxt); + /* PUSH_BINARY_EXPR(XPATH_OP_RANGETO, op2, ctxt->comp->last, 0, 0); */ + CHECK_ERROR; + + SKIP_BLANKS; + if (CUR != ')') { + XP_ERROR(XPATH_EXPR_ERROR); + } + NEXT; + rangeto = 1; + goto eval_predicates; + } + } +#endif + if (CUR == '*') { + axis = AXIS_CHILD; + } else { + if (name == NULL) + name = xmlXPathParseNCName(ctxt); + if(OOM_FLAG) return; + if (name != NULL) { + axis = xmlXPathIsAxisName(name); + if (axis != 0) { + SKIP_BLANKS; + if ((CUR == ':') && (NXT(1) == ':')) { + SKIP(2); + xmlFree(name); + name = NULL; + } else { + /* an element name can conflict with an axis one :-\ */ + axis = AXIS_CHILD; + } + } else { + axis = AXIS_CHILD; + } + } else if (CUR == '@') { + NEXT; + axis = AXIS_ATTRIBUTE; + } else { + axis = AXIS_CHILD; + } + } + + CHECK_ERROR; + + name = xmlXPathCompNodeTest(ctxt, &test, &type, &prefix, name); + if (test == 0) + return; + +#ifdef DEBUG_STEP + xmlGenericError(xmlGenericErrorContext, + "Basis : computing new set\n"); +#endif + +#ifdef DEBUG_STEP + xmlGenericError(xmlGenericErrorContext, "Basis : "); + if (ctxt->value == NULL) + xmlGenericError(xmlGenericErrorContext, "no value\n"); + else if (ctxt->value->nodesetval == NULL) + xmlGenericError(xmlGenericErrorContext, "Empty\n"); + else + xmlGenericErrorContextNodeSet(stdout, ctxt->value->nodesetval); +#endif + +#ifdef LIBXML_XPTR_ENABLED +eval_predicates: +#endif + op1 = ctxt->comp->last; + ctxt->comp->last = -1; + + SKIP_BLANKS; + while (CUR == '[') { + xmlXPathCompPredicate(ctxt, 0); + } + +#ifdef LIBXML_XPTR_ENABLED + if (rangeto) { + PUSH_BINARY_EXPR(XPATH_OP_RANGETO, op2, op1, 0, 0); + } else +#endif + PUSH_FULL_EXPR(XPATH_OP_COLLECT, op1, ctxt->comp->last, axis, + test, type, (void *)prefix, (void *)name); + + } +#ifdef DEBUG_STEP + xmlGenericError(xmlGenericErrorContext, "Step : "); + if (ctxt->value == NULL) + xmlGenericError(xmlGenericErrorContext, "no value\n"); + else if (ctxt->value->nodesetval == NULL) + xmlGenericError(xmlGenericErrorContext, "Empty\n"); + else + xmlGenericErrorContextNodeSet(xmlGenericErrorContext, + ctxt->value->nodesetval); +#endif +} + +/** + * xmlXPathCompRelativeLocationPath: + * @ctxt: the XPath Parser context + * + * [3] RelativeLocationPath ::= Step + * | RelativeLocationPath '/' Step + * | AbbreviatedRelativeLocationPath + * [11] AbbreviatedRelativeLocationPath ::= RelativeLocationPath '//' Step + * + * Compile a relative location path. + */ +static void +xmlXPathCompRelativeLocationPath +(xmlXPathParserContextPtr ctxt) { + SKIP_BLANKS; + if ((CUR == '/') && (NXT(1) == '/')) { + SKIP(2); + SKIP_BLANKS; + PUSH_LONG_EXPR(XPATH_OP_COLLECT, AXIS_DESCENDANT_OR_SELF, + NODE_TEST_TYPE, NODE_TYPE_NODE, NULL, NULL); + } else if (CUR == '/') { + NEXT; + SKIP_BLANKS; + } + xmlXPathCompStep(ctxt); + if(OOM_FLAG) return; + SKIP_BLANKS; + while (CUR == '/') { + if ((CUR == '/') && (NXT(1) == '/')) { + SKIP(2); + SKIP_BLANKS; + PUSH_LONG_EXPR(XPATH_OP_COLLECT, AXIS_DESCENDANT_OR_SELF, + NODE_TEST_TYPE, NODE_TYPE_NODE, NULL, NULL); + xmlXPathCompStep(ctxt); + if(OOM_FLAG) return; + } else if (CUR == '/') { + NEXT; + SKIP_BLANKS; + xmlXPathCompStep(ctxt); + } + SKIP_BLANKS; + } +} + +/** + * xmlXPathCompLocationPath: + * @ctxt: the XPath Parser context + * + * [1] LocationPath ::= RelativeLocationPath + * | AbsoluteLocationPath + * [2] AbsoluteLocationPath ::= '/' RelativeLocationPath? + * | AbbreviatedAbsoluteLocationPath + * [10] AbbreviatedAbsoluteLocationPath ::= + * '//' RelativeLocationPath + * + * Compile a location path + * + * // is short for /descendant-or-self::node()/. For example, + * //para is short for /descendant-or-self::node()/child::para and + * so will select any para element in the document (even a para element + * that is a document element will be selected by //para since the + * document element node is a child of the root node); div//para is + * short for div/descendant-or-self::node()/child::para and so will + * select all para descendants of div children. + */ +static void +xmlXPathCompLocationPath(xmlXPathParserContextPtr ctxt) { + SKIP_BLANKS; + if (CUR != '/') { + xmlXPathCompRelativeLocationPath(ctxt); + } else { + while (CUR == '/') { + if ((CUR == '/') && (NXT(1) == '/')) { + SKIP(2); + SKIP_BLANKS; + PUSH_LONG_EXPR(XPATH_OP_COLLECT, AXIS_DESCENDANT_OR_SELF, + NODE_TEST_TYPE, NODE_TYPE_NODE, NULL, NULL); + xmlXPathCompRelativeLocationPath(ctxt); + if(OOM_FLAG) return; + } else if (CUR == '/') { + NEXT; + SKIP_BLANKS; + if ((CUR != 0 ) && + ((IS_LETTER_CH(CUR)) || (CUR == '_') || (CUR == '.') || + (CUR == '@') || (CUR == '*'))) + { + xmlXPathCompRelativeLocationPath(ctxt); + if(OOM_FLAG) return; + } + } + } + } +} + +/************************************************************************ + * * + * XPath precompiled expression evaluation * + * * + ************************************************************************/ + +static int +xmlXPathCompOpEval(xmlXPathParserContextPtr ctxt, xmlXPathStepOpPtr op); + +/** + * xmlXPathNodeCollectAndTest: + * @ctxt: the XPath Parser context + * @op: the XPath precompiled step operation + * @first: pointer to the first element in document order + * @last: pointer to the last element in document order + * + * This is the function implementing a step: based on the current list + * of nodes, it builds up a new list, looking at all nodes under that + * axis and selecting them. It also does the predicate filtering + * + * Pushes the new NodeSet resulting from the search. + * + * Returns the number of nodes traversed or -1 when OOM + */ +static int +xmlXPathNodeCollectAndTest(xmlXPathParserContextPtr ctxt, + xmlXPathStepOpPtr op, + xmlNodePtr * first, xmlNodePtr * last) +{ + xmlXPathAxisVal axis = (xmlXPathAxisVal) op->value; + xmlXPathTestVal test = (xmlXPathTestVal) op->value2; + xmlXPathTypeVal type = (xmlXPathTypeVal) op->value3; + + const xmlChar* prefix = (xmlChar*) op->value4; + const xmlChar* name = (xmlChar*) op->value5; + const xmlChar* URI = NULL; + +#ifdef DEBUG_STEP + int n = 0; +#endif + + int i, t = 0; + xmlNodeSetPtr ret = NULL; + xmlNodeSetPtr list = NULL; + xmlXPathTraversalFunction next = NULL; + void (*addNode) (xmlNodeSetPtr, xmlNodePtr); + xmlNodeSetPtr (*mergeNodeSet) (xmlNodeSetPtr, xmlNodeSetPtr); + xmlNodePtr cur = NULL; + xmlXPathObjectPtr obj; + xmlNodeSetPtr nodelist; + xmlNodePtr tmp; + + CHECK_TYPE0(XPATH_NODESET); + obj = valuePop(ctxt); + addNode = xmlXPathNodeSetAdd; + mergeNodeSet = xmlXPathNodeSetMerge; + if (prefix != NULL) { + URI = xmlXPathNsLookup(ctxt->context, prefix); + if (URI == NULL) + XP_ERROR0(XPATH_UNDEF_PREFIX_ERROR); + } + +#ifdef DEBUG_STEP + xmlGenericError(xmlGenericErrorContext, "new step : "); +#endif + + switch (axis) + { + // TODO: OPTIMIZATION: Reorder options according to expectation of invocation + case AXIS_ANCESTOR: { +#ifdef DEBUG_STEP + xmlGenericError(xmlGenericErrorContext, "axis 'ancestors' "); +#endif + first = NULL; + next = xmlXPathNextAncestor; + break; + } + + case AXIS_ANCESTOR_OR_SELF: { +#ifdef DEBUG_STEP + xmlGenericError(xmlGenericErrorContext, "axis 'ancestors-or-self' "); +#endif + first = NULL; + next = xmlXPathNextAncestorOrSelf; + break; + } + + case AXIS_ATTRIBUTE:{ +#ifdef DEBUG_STEP + xmlGenericError(xmlGenericErrorContext, "axis 'attributes' "); +#endif + first = NULL; + last = NULL; + next = xmlXPathNextAttribute; + mergeNodeSet = xmlXPathNodeSetMergeUnique; + break; + } + + case AXIS_CHILD:{ +#ifdef DEBUG_STEP + xmlGenericError(xmlGenericErrorContext, "axis 'child' "); +#endif + last = NULL; + next = xmlXPathNextChild; + mergeNodeSet = xmlXPathNodeSetMergeUnique; + break; + } + + case AXIS_DESCENDANT:{ +#ifdef DEBUG_STEP + xmlGenericError(xmlGenericErrorContext, "axis 'descendant' "); +#endif + last = NULL; + next = xmlXPathNextDescendant; + break; + } + + case AXIS_DESCENDANT_OR_SELF:{ +#ifdef DEBUG_STEP + xmlGenericError(xmlGenericErrorContext, "axis 'descendant-or-self' "); +#endif + last = NULL; + next = xmlXPathNextDescendantOrSelf; + break; + } + + case AXIS_FOLLOWING:{ +#ifdef DEBUG_STEP + xmlGenericError(xmlGenericErrorContext, "axis 'following' "); +#endif + last = NULL; + next = xmlXPathNextFollowing; + break; + } + + case AXIS_FOLLOWING_SIBLING:{ +#ifdef DEBUG_STEP + xmlGenericError(xmlGenericErrorContext, "axis 'following-siblings' "); +#endif + last = NULL; + next = xmlXPathNextFollowingSibling; + break; + } + + case AXIS_NAMESPACE:{ +#ifdef DEBUG_STEP + xmlGenericError(xmlGenericErrorContext, "axis 'namespace' "); +#endif + first = NULL; + last = NULL; + next = (xmlXPathTraversalFunction) xmlXPathNextNamespace; + mergeNodeSet = xmlXPathNodeSetMergeUnique; + break; + } + + case AXIS_PARENT:{ +#ifdef DEBUG_STEP + xmlGenericError(xmlGenericErrorContext, "axis 'parent' "); +#endif + first = NULL; + next = xmlXPathNextParent; + break; + } + + case AXIS_PRECEDING:{ +#ifdef DEBUG_STEP + xmlGenericError(xmlGenericErrorContext, "axis 'preceding' "); +#endif + first = NULL; + next = xmlXPathNextPrecedingInternal; + break; + } + + case AXIS_PRECEDING_SIBLING:{ +#ifdef DEBUG_STEP + xmlGenericError(xmlGenericErrorContext, "axis 'preceding-sibling' "); +#endif + first = NULL; + next = xmlXPathNextPrecedingSibling; + break; + } + + case AXIS_SELF:{ +#ifdef DEBUG_STEP + xmlGenericError(xmlGenericErrorContext, "axis 'self' "); +#endif + first = NULL; + last = NULL; + next = xmlXPathNextSelf; + mergeNodeSet = xmlXPathNodeSetMergeUnique; + break; + } + + } // switch(axis) + + if (next == NULL) + return(0); + + nodelist = obj->nodesetval; + if (nodelist == NULL) { + xmlXPathFreeObject(obj); + valuePush(ctxt, xmlXPathWrapNodeSet(NULL)); + return(0); + } + addNode = xmlXPathNodeSetAddUnique; + ret = NULL; + +#ifdef DEBUG_STEP +{ + xmlGenericError(xmlGenericErrorContext, " context contains %d nodes\n", nodelist->nodeNr); + switch (test) { + case NODE_TEST_NONE: + xmlGenericError(xmlGenericErrorContext, " searching for none !!!\n"); + break; + case NODE_TEST_TYPE: + xmlGenericError(xmlGenericErrorContext, " searching for type %d\n", type); + break; + case NODE_TEST_PI: + xmlGenericError(xmlGenericErrorContext, " searching for PI !!!\n"); + break; + case NODE_TEST_ALL: + xmlGenericError(xmlGenericErrorContext, " searching for *\n"); + break; + case NODE_TEST_NS: + xmlGenericError(xmlGenericErrorContext, " searching for namespace %s\n", prefix); + break; + case NODE_TEST_NAME: + xmlGenericError(xmlGenericErrorContext, " searching for name %s\n", name); + if (prefix != NULL) + xmlGenericError(xmlGenericErrorContext, " with namespace %s\n", prefix); + break; + } + xmlGenericError(xmlGenericErrorContext, "Testing : "); +} +#endif + /* + * 2.3 Node Tests + * - For the attribute axis, the principal node type is attribute. + * - For the namespace axis, the principal node type is namespace. + * - For other axes, the principal node type is element. + * + * A node test * is true for any node of the + * principal node type. For example, child::* will + * select all element children of the context node + */ + tmp = ctxt->context->node; + + for (i = 0; i < nodelist->nodeNr; i++) + { + ctxt->context->node = nodelist->nodeTab[i]; + cur = NULL; + list = xmlXPathNodeSetCreate(NULL); + if(OOM_FLAG) + { + xmlXPathFreeObject(obj); + xmlXPathFreeNodeSet(ret); + return(-1); + } + // + do { + cur = next(ctxt, cur); + if (cur == NULL) + break; + if ((first != NULL) && (*first == cur)) + break; + if (((t % 256) == 0) && + (first != NULL) && (*first != NULL) && + (xmlXPathCmpNodes(*first, cur) >= 0)) + break; + if ((last != NULL) && (*last == cur)) + break; + if (((t % 256) == 0) && + (last != NULL) && (*last != NULL) && + (xmlXPathCmpNodes(cur, *last) >= 0)) + break; + + t++; +#ifdef DEBUG_STEP + xmlGenericError(xmlGenericErrorContext, " %s", cur->name); +#endif + switch (test) + { + case NODE_TEST_NONE:{ + ctxt->context->node = tmp; + STRANGE return(t); + } + case NODE_TEST_TYPE:{ + // TODO: OPTIMIZATION: Reorder to maximize performance of partial evaluation + if ((cur->type == type) || + ((type == NODE_TYPE_NODE) && + ((cur->type == XML_DOCUMENT_NODE) || + (cur->type == XML_HTML_DOCUMENT_NODE) || + (cur->type == XML_ELEMENT_NODE) || + (cur->type == XML_NAMESPACE_DECL) || + (cur->type == XML_ATTRIBUTE_NODE) || + (cur->type == XML_PI_NODE) || + (cur->type == XML_COMMENT_NODE) || + (cur->type == XML_CDATA_SECTION_NODE) || + (cur->type == XML_TEXT_NODE))) || + ((type == NODE_TYPE_TEXT) && + (cur->type == XML_CDATA_SECTION_NODE))) + { +#ifdef DEBUG_STEP + n++; +#endif + addNode(list, cur); + } + break; + } + + case NODE_TEST_PI: { + if (cur->type == XML_PI_NODE) + { + if ((name != NULL) && (!xmlStrEqual(name, cur->name))) + break; +#ifdef DEBUG_STEP + n++; +#endif + addNode(list, cur); + } + break; + } + + case NODE_TEST_ALL: { + if (axis == AXIS_ATTRIBUTE) { + if (cur->type == XML_ATTRIBUTE_NODE) { +#ifdef DEBUG_STEP + n++; +#endif + addNode(list, cur); + } + } else + if (axis == AXIS_NAMESPACE) { + if (cur->type == XML_NAMESPACE_DECL) { +#ifdef DEBUG_STEP + n++; +#endif + xmlXPathNodeSetAddNs(list, ctxt->context->node, (xmlNsPtr) cur); + } + } else { + if (cur->type == XML_ELEMENT_NODE) { + if (prefix == NULL) { +#ifdef DEBUG_STEP + n++; +#endif + addNode(list, cur); + if(OOM_FLAG) + { + xmlXPathFreeObject(obj); + xmlXPathFreeNodeSet(list); + xmlXPathFreeNodeSet(ret); + return(-1); + } + } else + if ((cur->ns != NULL) && (xmlStrEqual(URI, cur->ns->href))) { +#ifdef DEBUG_STEP + n++; +#endif + addNode(list, cur); + } + } + } + break; + } + + case NODE_TEST_NS: { + TODO; + break; + } + case NODE_TEST_NAME:{ + switch (cur->type) { + case XML_ELEMENT_NODE: { + if (xmlStrEqual(name, cur->name)) { + if (prefix == NULL) { + if (cur->ns == NULL) { // should we add here || cur->ns->pref == NULL ? +#ifdef DEBUG_STEP + n++; +#endif + addNode(list, cur); + if(OOM_FLAG) + { + xmlXPathFreeObject(obj); + xmlXPathFreeNodeSet(list); + return(-1); + } + } + } else { + if ((cur->ns != NULL) && (xmlStrEqual(URI, cur->ns->href))) { +#ifdef DEBUG_STEP + n++; +#endif + addNode(list, cur); + } + } + } + break; + } + + case XML_ATTRIBUTE_NODE:{ + xmlAttrPtr attr = (xmlAttrPtr) cur; + + if (xmlStrEqual(name, attr->name)) { + if (prefix == NULL) { + if ((attr->ns == NULL) || (attr->ns->prefix == NULL)) { +#ifdef DEBUG_STEP + n++; +#endif + addNode(list, (xmlNodePtr) attr); + if(OOM_FLAG) + { + xmlXPathFreeObject(obj); + xmlXPathFreeNodeSet(list); + return(-1); + } + } + } else { + if ((attr->ns != NULL) && (xmlStrEqual(URI, attr->ns->href))) { +#ifdef DEBUG_STEP + n++; +#endif + addNode(list, (xmlNodePtr) attr); + } + } + } + break; + } + case XML_NAMESPACE_DECL:{ + if (cur->type == XML_NAMESPACE_DECL) { + xmlNsPtr ns = (xmlNsPtr) cur; + + if ((ns->prefix != NULL) && (name != NULL) + && (xmlStrEqual(ns->prefix, name))) + { +#ifdef DEBUG_STEP + n++; +#endif + xmlXPathNodeSetAddNs(list, ctxt->context->node, (xmlNsPtr) cur); + } + } + break; + } + + default: + break; + } + + break; + break; + } + } // switch(test) + } while (cur != NULL); + + /* + * If there is some predicate filtering do it now + */ + if ((op->ch2 != -1) && (list != NULL) && (list->nodeNr > 0)) + { + xmlXPathObjectPtr obj2; + + valuePush(ctxt, xmlXPathWrapNodeSet(list)); + if(OOM_FLAG) + { + xmlXPathFreeObject(obj); + xmlXPathFreeNodeSet(list); + xmlXPathFreeNodeSet(ret); + return(-1); + } + xmlXPathCompOpEval(ctxt, &ctxt->comp->steps[op->ch2]); + CHECK_TYPE0(XPATH_NODESET); + obj2 = valuePop(ctxt); + list = obj2->nodesetval; + obj2->nodesetval = NULL; + xmlXPathFreeObject(obj2); + } + if (ret == NULL) { + ret = list; + } else { + ret = mergeNodeSet(ret, list); + xmlXPathFreeNodeSet(list); + } + } // for (i = 0; i < nodelist->nodeNr; i++) + + ctxt->context->node = tmp; + +#ifdef DEBUG_STEP + xmlGenericError(xmlGenericErrorContext, "\nExamined %d nodes, found %d nodes at that step\n", t, n); +#endif + + valuePush(ctxt, xmlXPathWrapNodeSet(ret)); + if(OOM_FLAG) + { + xmlXPathFreeObject(obj); + xmlXPathFreeNodeSet(list); + return(-1); + } + if ((obj->boolval) && (obj->user != NULL)) { + ctxt->value->boolval = 1; + ctxt->value->user = obj->user; + obj->user = NULL; + obj->boolval = 0; + } + xmlXPathFreeObject(obj); + return(t); +} + +/** + * xmlXPathNodeCollectAndTestNth: + * @ctxt: the XPath Parser context + * @op: the XPath precompiled step operation + * @indx: the index to collect + * @first: pointer to the first element in document order + * @last: pointer to the last element in document order + * + * This is the function implementing a step: based on the current list + * of nodes, it builds up a new list, looking at all nodes under that + * axis and selecting them. It also does the predicate filtering + * + * Pushes the new NodeSet resulting from the search. + * Returns the number of node traversed or -1 when OOM + */ +static int +xmlXPathNodeCollectAndTestNth(xmlXPathParserContextPtr ctxt, + xmlXPathStepOpPtr op, int indx, + xmlNodePtr * first, xmlNodePtr * last) +{ + xmlXPathAxisVal axis = (xmlXPathAxisVal) op->value; + xmlXPathTestVal test = (xmlXPathTestVal) op->value2; + xmlXPathTypeVal type = (xmlXPathTypeVal) op->value3; + const xmlChar *prefix = (xmlChar*)op->value4; + const xmlChar *name = (xmlChar*)op->value5; + const xmlChar *URI = NULL; + int n = 0, t = 0; + + int i; + xmlNodeSetPtr list; + xmlXPathTraversalFunction next = NULL; + void (*addNode) (xmlNodeSetPtr, xmlNodePtr); + xmlNodePtr cur = NULL; + xmlXPathObjectPtr obj; + xmlNodeSetPtr nodelist; + xmlNodePtr tmp; + + CHECK_TYPE0(XPATH_NODESET); + obj = valuePop(ctxt); + addNode = xmlXPathNodeSetAdd; + if (prefix != NULL) { + URI = xmlXPathNsLookup(ctxt->context, prefix); + if (URI == NULL) + XP_ERROR0(XPATH_UNDEF_PREFIX_ERROR); + } +#ifdef DEBUG_STEP_NTH + xmlGenericError(xmlGenericErrorContext, "new step : "); + if (first != NULL) { + if (*first != NULL) + xmlGenericError(xmlGenericErrorContext, "first = %s ", + (*first)->name); + else + xmlGenericError(xmlGenericErrorContext, "first = NULL "); + } + if (last != NULL) { + if (*last != NULL) + xmlGenericError(xmlGenericErrorContext, "last = %s ", + (*last)->name); + else + xmlGenericError(xmlGenericErrorContext, "last = NULL "); + } +#endif + switch (axis) { + case AXIS_ANCESTOR: +#ifdef DEBUG_STEP_NTH + xmlGenericError(xmlGenericErrorContext, "axis 'ancestors' "); +#endif + first = NULL; + next = xmlXPathNextAncestor; + break; + case AXIS_ANCESTOR_OR_SELF: +#ifdef DEBUG_STEP_NTH + xmlGenericError(xmlGenericErrorContext, + "axis 'ancestors-or-self' "); +#endif + first = NULL; + next = xmlXPathNextAncestorOrSelf; + break; + case AXIS_ATTRIBUTE: +#ifdef DEBUG_STEP_NTH + xmlGenericError(xmlGenericErrorContext, "axis 'attributes' "); +#endif + first = NULL; + last = NULL; + next = xmlXPathNextAttribute; + break; + case AXIS_CHILD: +#ifdef DEBUG_STEP_NTH + xmlGenericError(xmlGenericErrorContext, "axis 'child' "); +#endif + last = NULL; + next = xmlXPathNextChild; + break; + case AXIS_DESCENDANT: +#ifdef DEBUG_STEP_NTH + xmlGenericError(xmlGenericErrorContext, "axis 'descendant' "); +#endif + last = NULL; + next = xmlXPathNextDescendant; + break; + case AXIS_DESCENDANT_OR_SELF: +#ifdef DEBUG_STEP_NTH + xmlGenericError(xmlGenericErrorContext, + "axis 'descendant-or-self' "); +#endif + last = NULL; + next = xmlXPathNextDescendantOrSelf; + break; + case AXIS_FOLLOWING: +#ifdef DEBUG_STEP_NTH + xmlGenericError(xmlGenericErrorContext, "axis 'following' "); +#endif + last = NULL; + next = xmlXPathNextFollowing; + break; + case AXIS_FOLLOWING_SIBLING: +#ifdef DEBUG_STEP_NTH + xmlGenericError(xmlGenericErrorContext, + "axis 'following-siblings' "); +#endif + last = NULL; + next = xmlXPathNextFollowingSibling; + break; + case AXIS_NAMESPACE: +#ifdef DEBUG_STEP_NTH + xmlGenericError(xmlGenericErrorContext, "axis 'namespace' "); +#endif + last = NULL; + first = NULL; + next = (xmlXPathTraversalFunction) xmlXPathNextNamespace; + break; + case AXIS_PARENT: +#ifdef DEBUG_STEP_NTH + xmlGenericError(xmlGenericErrorContext, "axis 'parent' "); +#endif + first = NULL; + next = xmlXPathNextParent; + break; + case AXIS_PRECEDING: +#ifdef DEBUG_STEP_NTH + xmlGenericError(xmlGenericErrorContext, "axis 'preceding' "); +#endif + first = NULL; + next = xmlXPathNextPrecedingInternal; + break; + case AXIS_PRECEDING_SIBLING: +#ifdef DEBUG_STEP_NTH + xmlGenericError(xmlGenericErrorContext, + "axis 'preceding-sibling' "); +#endif + first = NULL; + next = xmlXPathNextPrecedingSibling; + break; + case AXIS_SELF: +#ifdef DEBUG_STEP_NTH + xmlGenericError(xmlGenericErrorContext, "axis 'self' "); +#endif + first = NULL; + last = NULL; + next = xmlXPathNextSelf; + break; + } + if (next == NULL) + return(0); + + nodelist = obj->nodesetval; + if (nodelist == NULL) { + xmlXPathFreeObject(obj); + valuePush(ctxt, xmlXPathWrapNodeSet(NULL)); + return(0); + } + addNode = xmlXPathNodeSetAddUnique; +#ifdef DEBUG_STEP_NTH + xmlGenericError(xmlGenericErrorContext, + " context contains %d nodes\n", nodelist->nodeNr); + switch (test) { + case NODE_TEST_NONE: + xmlGenericError(xmlGenericErrorContext, + " searching for none !!!\n"); + break; + case NODE_TEST_TYPE: + xmlGenericError(xmlGenericErrorContext, + " searching for type %d\n", type); + break; + case NODE_TEST_PI: + xmlGenericError(xmlGenericErrorContext, + " searching for PI !!!\n"); + break; + case NODE_TEST_ALL: + xmlGenericError(xmlGenericErrorContext, + " searching for *\n"); + break; + case NODE_TEST_NS: + xmlGenericError(xmlGenericErrorContext, + " searching for namespace %s\n", + prefix); + break; + case NODE_TEST_NAME: + xmlGenericError(xmlGenericErrorContext, + " searching for name %s\n", name); + if (prefix != NULL) + xmlGenericError(xmlGenericErrorContext, + " with namespace %s\n", prefix); + break; + } + xmlGenericError(xmlGenericErrorContext, "Testing : "); +#endif + /* + * 2.3 Node Tests + * - For the attribute axis, the principal node type is attribute. + * - For the namespace axis, the principal node type is namespace. + * - For other axes, the principal node type is element. + * + * A node test * is true for any node of the + * principal node type. For example, child::* will + * select all element children of the context node + */ + tmp = ctxt->context->node; + list = xmlXPathNodeSetCreate(NULL); + if(OOM_FLAG) + { + xmlXPathFreeObject(obj); + return(-1); + } + for (i = 0; i < nodelist->nodeNr; i++) { + ctxt->context->node = nodelist->nodeTab[i]; + + cur = NULL; + n = 0; + do { + cur = next(ctxt, cur); + if (cur == NULL) + break; + if ((first != NULL) && (*first == cur)) + break; + if (((t % 256) == 0) && + (first != NULL) && (*first != NULL) && + (xmlXPathCmpNodes(*first, cur) >= 0)) + break; + if ((last != NULL) && (*last == cur)) + break; + if (((t % 256) == 0) && + (last != NULL) && (*last != NULL) && + (xmlXPathCmpNodes(cur, *last) >= 0)) + break; + t++; + switch (test) { + case NODE_TEST_NONE: + ctxt->context->node = tmp; + STRANGE return(0); + case NODE_TEST_TYPE: + if ((cur->type == type) || + ((type == NODE_TYPE_NODE) && + ((cur->type == XML_DOCUMENT_NODE) || + (cur->type == XML_HTML_DOCUMENT_NODE) || + (cur->type == XML_ELEMENT_NODE) || + (cur->type == XML_PI_NODE) || + (cur->type == XML_COMMENT_NODE) || + (cur->type == XML_CDATA_SECTION_NODE) || + (cur->type == XML_TEXT_NODE))) || + ((type == NODE_TYPE_TEXT) && + (cur->type == XML_CDATA_SECTION_NODE))) { + n++; + if (n == indx) + addNode(list, cur); + } + break; + case NODE_TEST_PI: + if (cur->type == XML_PI_NODE) { + if ((name != NULL) && + (!xmlStrEqual(name, cur->name))) + break; + n++; + if (n == indx) + addNode(list, cur); + } + break; + case NODE_TEST_ALL: + if (axis == AXIS_ATTRIBUTE) { + if (cur->type == XML_ATTRIBUTE_NODE) { + n++; + if (n == indx) + addNode(list, cur); + } + } else if (axis == AXIS_NAMESPACE) { + if (cur->type == XML_NAMESPACE_DECL) { + n++; + if (n == indx) + xmlXPathNodeSetAddNs(list, ctxt->context->node, + (xmlNsPtr) cur); + } + } else { + if (cur->type == XML_ELEMENT_NODE) { + if (prefix == NULL) { + n++; + if (n == indx) + addNode(list, cur); + } else if ((cur->ns != NULL) && + (xmlStrEqual(URI, cur->ns->href))) { + n++; + if (n == indx) + addNode(list, cur); + } + } + } + break; + case NODE_TEST_NS:{ + TODO; + break; + } + case NODE_TEST_NAME: + switch (cur->type) { + case XML_ELEMENT_NODE: + if (xmlStrEqual(name, cur->name)) { + if (prefix == NULL) { + if (cur->ns == NULL) { + n++; + if (n == indx) + { + addNode(list, cur); + if(OOM_FLAG) + { + xmlXPathFreeObject(obj); + xmlXPathFreeNodeSet(list); + return(-1); + } + } + + } + } else { + if ((cur->ns != NULL) && + (xmlStrEqual(URI, + cur->ns->href))) { + n++; + if (n == indx) + addNode(list, cur); + } + } + } + break; + case XML_ATTRIBUTE_NODE:{ + xmlAttrPtr attr = (xmlAttrPtr) cur; + + if (xmlStrEqual(name, attr->name)) { + if (prefix == NULL) { + if ((attr->ns == NULL) || + (attr->ns->prefix == NULL)) { + n++; + if (n == indx) + addNode(list, cur); + } + } else { + if ((attr->ns != NULL) && + (xmlStrEqual(URI, + attr->ns-> + href))) { + n++; + if (n == indx) + addNode(list, cur); + } + } + } + break; + } + case XML_NAMESPACE_DECL: + if (cur->type == XML_NAMESPACE_DECL) { + xmlNsPtr ns = (xmlNsPtr) cur; + + if ((ns->prefix != NULL) && (name != NULL) + && (xmlStrEqual(ns->prefix, name))) { + n++; + if (n == indx) + xmlXPathNodeSetAddNs(list, + ctxt->context->node, (xmlNsPtr) cur); + } + } + break; + default: + break; + } + break; + break; + } + } while (n < indx); + } + ctxt->context->node = tmp; +#ifdef DEBUG_STEP_NTH + xmlGenericError(xmlGenericErrorContext, + "\nExamined %d nodes, found %d nodes at that step\n", + t, list->nodeNr); +#endif + valuePush(ctxt, xmlXPathWrapNodeSet(list)); + if(OOM_FLAG) + { + xmlXPathFreeObject(obj); + xmlXPathFreeNodeSet(list); + return(-1); + } + if ((obj->boolval) && (obj->user != NULL)) { + ctxt->value->boolval = 1; + ctxt->value->user = obj->user; + obj->user = NULL; + obj->boolval = 0; + } + xmlXPathFreeObject(obj); + return(t); +} + +/** + * xmlXPathCompOpEvalFirst: + * @ctxt: the XPath parser context with the compiled expression + * @op: an XPath compiled operation + * @first: the first elem found so far + * + * Evaluate the Precompiled XPath operation searching only the first + * element in document order + * + * Returns the number of examined objects. + */ +static int +xmlXPathCompOpEvalFirst(xmlXPathParserContextPtr ctxt, + xmlXPathStepOpPtr op, xmlNodePtr * first) +{ + int total = 0, cur; + xmlXPathCompExprPtr comp; + xmlXPathObjectPtr arg1, arg2; + + CHECK_ERROR0; + comp = ctxt->comp; + switch (op->op) { + case XPATH_OP_END: + return (0); + case XPATH_OP_UNION: + total = + xmlXPathCompOpEvalFirst(ctxt, &comp->steps[op->ch1], + first); + CHECK_ERROR0; + if ((ctxt->value != NULL) + && (ctxt->value->type == XPATH_NODESET) + && (ctxt->value->nodesetval != NULL) + && (ctxt->value->nodesetval->nodeNr >= 1)) { + /* + * limit tree traversing to first node in the result + */ + xmlXPathNodeSetSort(ctxt->value->nodesetval); + *first = ctxt->value->nodesetval->nodeTab[0]; + } + cur = + xmlXPathCompOpEvalFirst(ctxt, &comp->steps[op->ch2], + first); + CHECK_ERROR0; + CHECK_TYPE0(XPATH_NODESET); + arg2 = valuePop(ctxt); + + CHECK_TYPE0(XPATH_NODESET); + arg1 = valuePop(ctxt); + + arg1->nodesetval = xmlXPathNodeSetMerge(arg1->nodesetval, + arg2->nodesetval); + valuePush(ctxt, arg1); + xmlXPathFreeObject(arg2); + /* optimizer */ + if (total > cur) + xmlXPathCompSwap(op); + return (total + cur); + case XPATH_OP_ROOT: + xmlXPathRoot(ctxt); + return (0); + case XPATH_OP_NODE: + if (op->ch1 != -1) + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); + CHECK_ERROR0; + if (op->ch2 != -1) + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); + CHECK_ERROR0; + valuePush(ctxt, xmlXPathNewNodeSet(ctxt->context->node)); + return (total); + case XPATH_OP_RESET: + if (op->ch1 != -1) + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); + CHECK_ERROR0; + if (op->ch2 != -1) + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); + CHECK_ERROR0; + ctxt->context->node = NULL; + return (total); + case XPATH_OP_COLLECT:{ + if (op->ch1 == -1) + return (total); + + total = xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); + CHECK_ERROR0; + + /* + * Optimization for [n] selection where n is a number + */ + if ((op->ch2 != -1) && + (comp->steps[op->ch2].op == XPATH_OP_PREDICATE) && + (comp->steps[op->ch2].ch1 == -1) && + (comp->steps[op->ch2].ch2 != -1) && + (comp->steps[comp->steps[op->ch2].ch2].op == + XPATH_OP_VALUE)) { + xmlXPathObjectPtr val; + + val = (xmlXPathObjectPtr)comp->steps[comp->steps[op->ch2].ch2].value4; + if ((val != NULL) && (val->type == XPATH_NUMBER)) { + int indx = (int) val->floatval; + + if (val->floatval == (float) indx) { + xmlXPathNodeCollectAndTestNth(ctxt, op, indx, + first, NULL); + return (total); + } + } + } + total += xmlXPathNodeCollectAndTest(ctxt, op, first, NULL); + return (total); + } + case XPATH_OP_VALUE: + valuePush(ctxt, xmlXPathObjectCopy((xmlXPathObjectPtr) op->value4)); + return (0); + + case XPATH_OP_SORT: + if (op->ch1 != -1) + total += xmlXPathCompOpEvalFirst(ctxt, &comp->steps[op->ch1], first); + CHECK_ERROR0; + if ((ctxt->value != NULL) + && (ctxt->value->type == XPATH_NODESET) + && (ctxt->value->nodesetval != NULL)) + { + xmlXPathNodeSetSort(ctxt->value->nodesetval); + } + return (total); + + default: + return (xmlXPathCompOpEval(ctxt, op)); + } +} + +/** + * xmlXPathCompOpEvalLast: + * @ctxt: the XPath parser context with the compiled expression + * @op: an XPath compiled operation + * @last: the last elem found so far + * + * Evaluate the Precompiled XPath operation searching only the last + * element in document order + * + * Returns the number of nodes traversed + */ +static int +xmlXPathCompOpEvalLast(xmlXPathParserContextPtr ctxt, xmlXPathStepOpPtr op, + xmlNodePtr * last) +{ + int total = 0, cur; + xmlXPathCompExprPtr comp; + xmlXPathObjectPtr arg1, arg2; + xmlNodePtr bak; + xmlDocPtr bakd; + int pp; + int cs; + + CHECK_ERROR0; + comp = ctxt->comp; + switch (op->op) { + case XPATH_OP_END: + return (0); + case XPATH_OP_UNION: + bakd = ctxt->context->doc; + bak = ctxt->context->node; + pp = ctxt->context->proximityPosition; + cs = ctxt->context->contextSize; + total = + xmlXPathCompOpEvalLast(ctxt, &comp->steps[op->ch1], last); + CHECK_ERROR0; + if ((ctxt->value != NULL) + && (ctxt->value->type == XPATH_NODESET) + && (ctxt->value->nodesetval != NULL) + && (ctxt->value->nodesetval->nodeNr >= 1)) { + /* + * limit tree traversing to first node in the result + */ + xmlXPathNodeSetSort(ctxt->value->nodesetval); + *last = + ctxt->value->nodesetval->nodeTab[ctxt->value-> + nodesetval->nodeNr - + 1]; + } + ctxt->context->doc = bakd; + ctxt->context->node = bak; + ctxt->context->proximityPosition = pp; + ctxt->context->contextSize = cs; + cur = + xmlXPathCompOpEvalLast(ctxt, &comp->steps[op->ch2], last); + CHECK_ERROR0; + if ((ctxt->value != NULL) + && (ctxt->value->type == XPATH_NODESET) + && (ctxt->value->nodesetval != NULL) + && (ctxt->value->nodesetval->nodeNr >= 1)) { + } + CHECK_TYPE0(XPATH_NODESET); + arg2 = valuePop(ctxt); + + CHECK_TYPE0(XPATH_NODESET); + arg1 = valuePop(ctxt); + + arg1->nodesetval = xmlXPathNodeSetMerge(arg1->nodesetval, + arg2->nodesetval); + valuePush(ctxt, arg1); + xmlXPathFreeObject(arg2); + /* optimizer */ + if (total > cur) + xmlXPathCompSwap(op); + return (total + cur); + case XPATH_OP_ROOT: + xmlXPathRoot(ctxt); + return (0); + case XPATH_OP_NODE: + if (op->ch1 != -1) + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); + CHECK_ERROR0; + if (op->ch2 != -1) + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); + CHECK_ERROR0; + valuePush(ctxt, xmlXPathNewNodeSet(ctxt->context->node)); + return (total); + case XPATH_OP_RESET: + if (op->ch1 != -1) + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); + CHECK_ERROR0; + if (op->ch2 != -1) + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); + CHECK_ERROR0; + ctxt->context->node = NULL; + return (total); + case XPATH_OP_COLLECT:{ + if (op->ch1 == -1) + return (0); + + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); + CHECK_ERROR0; + + /* + * Optimization for [n] selection where n is a number + */ + if ((op->ch2 != -1) && + (comp->steps[op->ch2].op == XPATH_OP_PREDICATE) && + (comp->steps[op->ch2].ch1 == -1) && + (comp->steps[op->ch2].ch2 != -1) && + (comp->steps[comp->steps[op->ch2].ch2].op == + XPATH_OP_VALUE)) { + xmlXPathObjectPtr val; + + val = (xmlXPathObjectPtr)comp->steps[comp->steps[op->ch2].ch2].value4; + if ((val != NULL) && (val->type == XPATH_NUMBER)) { + int indx = (int) val->floatval; + + if (val->floatval == (float) indx) { + total += xmlXPathNodeCollectAndTestNth(ctxt, op, indx, NULL, last); + return (total); + } + } + } + total += xmlXPathNodeCollectAndTest(ctxt, op, NULL, last); + return (total); + } + case XPATH_OP_VALUE: + valuePush(ctxt, xmlXPathObjectCopy((xmlXPathObjectPtr) op->value4)); + return (0); + + case XPATH_OP_SORT: + if (op->ch1 != -1) + total += xmlXPathCompOpEvalLast(ctxt, &comp->steps[op->ch1], last); + CHECK_ERROR0; + if ((ctxt->value != NULL) + && (ctxt->value->type == XPATH_NODESET) + && (ctxt->value->nodesetval != NULL)) + xmlXPathNodeSetSort(ctxt->value->nodesetval); + { + return (total); + } + + default: + return (xmlXPathCompOpEval(ctxt, op)); + } +} + +/** + * xmlXPathCompOpEval: + * @ctxt: the XPath parser context with the compiled expression + * @op: an XPath compiled operation + * + * Evaluate the Precompiled XPath operation + * Returns the number of nodes traversed or -1 when OOM + */ +static int +xmlXPathCompOpEval(xmlXPathParserContextPtr ctxt, xmlXPathStepOpPtr op) +{ + int total = 0; + int equal, ret; + xmlXPathCompExprPtr comp; + xmlXPathObjectPtr arg1, arg2; + xmlNodePtr bak; + xmlDocPtr bakd; + int pp; + int cs; + + CHECK_ERROR0; + + comp = ctxt->comp; + //TODO: OPTIMIZE: xmlXPathContextPtr xpctxt = ctxt->context; // and reuse it below + switch (op->op) + { + case XPATH_OP_END: return (0); + case XPATH_OP_AND: { + bakd = ctxt->context->doc; + bak = ctxt->context->node; + pp = ctxt->context->proximityPosition; + cs = ctxt->context->contextSize; + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); + CHECK_ERROR0; + +#ifdef XMLENGINE_XFORMS_EXTENSIONS + addNodeSetsFromStackToDependencyList(ctxt, 1); +#endif + + xmlXPathBooleanFunction(ctxt, 1); + if ((ctxt->value == NULL) || (ctxt->value->boolval == 0)) + return (total); + arg2 = valuePop(ctxt); + ctxt->context->doc = bakd; + ctxt->context->node = bak; + ctxt->context->proximityPosition = pp; + ctxt->context->contextSize = cs; + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); + if (ctxt->error) { + xmlXPathFreeObject(arg2); + return(0); + } + +#ifdef XMLENGINE_XFORMS_EXTENSIONS + addNodeSetsFromStackToDependencyList(ctxt, 1); +#endif + xmlXPathBooleanFunction(ctxt, 1); + arg1 = valuePop(ctxt); + arg1->boolval &= arg2->boolval; + valuePush(ctxt, arg1); + xmlXPathFreeObject(arg2); + return (total); + } + + case XPATH_OP_OR: { + bakd = ctxt->context->doc; + bak = ctxt->context->node; + pp = ctxt->context->proximityPosition; + cs = ctxt->context->contextSize; + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); + CHECK_ERROR0; + +#ifdef XMLENGINE_XFORMS_EXTENSIONS + addNodeSetsFromStackToDependencyList(ctxt, 1); +#endif + xmlXPathBooleanFunction(ctxt, 1); +/* +#ifdef XMLENGINE_XFORMS_EXTENSIONS + // in dependency evaluation mode we must always process both parts + // of OR operation in the XPath expression + if (!ctxt->context->dependencyList && (ctxt->value || (ctxt->value->boolval == 1))) + return (total); +#else +*/ + if ((ctxt->value == NULL) || (ctxt->value->boolval == 1)) + return (total); +/* + #endif + */ + arg2 = valuePop(ctxt); + ctxt->context->doc = bakd; + ctxt->context->node = bak; + ctxt->context->proximityPosition = pp; + ctxt->context->contextSize = cs; + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); + + if (ctxt->error) { + xmlXPathFreeObject(arg2); + return(0); + } +#ifdef XMLENGINE_XFORMS_EXTENSIONS + addNodeSetsFromStackToDependencyList(ctxt, 1); +#endif + xmlXPathBooleanFunction(ctxt, 1); + arg1 = valuePop(ctxt); + arg1->boolval |= arg2->boolval; + valuePush(ctxt, arg1); + xmlXPathFreeObject(arg2); + return (total); + } + + case XPATH_OP_EQUAL: { + bakd = ctxt->context->doc; + bak = ctxt->context->node; + pp = ctxt->context->proximityPosition; + cs = ctxt->context->contextSize; + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); + CHECK_ERROR0; + + ctxt->context->doc = bakd; + ctxt->context->node = bak; + ctxt->context->proximityPosition = pp; + ctxt->context->contextSize = cs; + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); + CHECK_ERROR0; + +#ifdef XMLENGINE_XFORMS_EXTENSIONS + addNodeSetsFromStackToDependencyList(ctxt, 2); +#endif + + if (op->value) + equal = xmlXPathEqualValues(ctxt); + else + equal = xmlXPathNotEqualValues(ctxt); + + valuePush(ctxt, xmlXPathNewBoolean(equal)); + return (total); + } + + case XPATH_OP_CMP: { + bakd = ctxt->context->doc; + bak = ctxt->context->node; + pp = ctxt->context->proximityPosition; + cs = ctxt->context->contextSize; + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); + CHECK_ERROR0; + + ctxt->context->doc = bakd; + ctxt->context->node = bak; + ctxt->context->proximityPosition = pp; + ctxt->context->contextSize = cs; + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); + CHECK_ERROR0; + +#ifdef XMLENGINE_XFORMS_EXTENSIONS + addNodeSetsFromStackToDependencyList(ctxt, 2); +#endif + ret = xmlXPathCompareValues(ctxt, op->value, op->value2); + valuePush(ctxt, xmlXPathNewBoolean(ret)); + return (total); + } + + case XPATH_OP_PLUS: { + bakd = ctxt->context->doc; + bak = ctxt->context->node; + pp = ctxt->context->proximityPosition; + cs = ctxt->context->contextSize; + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); + CHECK_ERROR0; + + if (op->ch2 != -1) { + ctxt->context->doc = bakd; + ctxt->context->node = bak; + ctxt->context->proximityPosition = pp; + ctxt->context->contextSize = cs; + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); + } + CHECK_ERROR0; + +#ifdef XMLENGINE_XFORMS_EXTENSIONS + // TODO: OPTIMIZATION: Can we use (op->value!=2) here? / Is reordering required? + if (op->value == 0 || op->value == 1) + addNodeSetsFromStackToDependencyList(ctxt, 2); + else if (op->value == 2) + addNodeSetsFromStackToDependencyList(ctxt, 1); +#endif + // TODO: OPTIMIZATION: Reordering accordig to value type frequency + if (op->value == 0) + xmlXPathSubValues(ctxt); + else if (op->value == 1) + xmlXPathAddValues(ctxt); + else if (op->value == 2) + xmlXPathValueFlipSign(ctxt); + else if (op->value == 3) { + CAST_TO_NUMBER; + CHECK_TYPE0(XPATH_NUMBER); + } + return (total); + } + + case XPATH_OP_MULT: { + bakd = ctxt->context->doc; + bak = ctxt->context->node; + pp = ctxt->context->proximityPosition; + cs = ctxt->context->contextSize; + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); + CHECK_ERROR0; + + ctxt->context->doc = bakd; + ctxt->context->node = bak; + ctxt->context->proximityPosition = pp; + ctxt->context->contextSize = cs; + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); + CHECK_ERROR0; + +#ifdef XMLENGINE_XFORMS_EXTENSIONS + addNodeSetsFromStackToDependencyList(ctxt, 2); +#endif + + if (op->value == 0) + xmlXPathMultValues(ctxt); + else if (op->value == 1) + xmlXPathDivValues(ctxt); + else if (op->value == 2) + xmlXPathModValues(ctxt); + return (total); + } + + case XPATH_OP_UNION: { + bakd = ctxt->context->doc; + bak = ctxt->context->node; + pp = ctxt->context->proximityPosition; + cs = ctxt->context->contextSize; + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); + CHECK_ERROR0; + + ctxt->context->doc = bakd; + ctxt->context->node = bak; + ctxt->context->proximityPosition = pp; + ctxt->context->contextSize = cs; + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); + CHECK_ERROR0; + + CHECK_TYPE0(XPATH_NODESET); + arg2 = valuePop(ctxt); + + CHECK_TYPE0(XPATH_NODESET); + arg1 = valuePop(ctxt); + + arg1->nodesetval = xmlXPathNodeSetMerge(arg1->nodesetval, arg2->nodesetval); + valuePush(ctxt, arg1); + xmlXPathFreeObject(arg2); + + return (total); + } + + case XPATH_OP_ROOT: { + xmlXPathRoot(ctxt); + return (total); + } + + case XPATH_OP_NODE: { + if (op->ch1 != -1) + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); + CHECK_ERROR0; + + if (op->ch2 != -1) + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); + CHECK_ERROR0; + + valuePush(ctxt, xmlXPathNewNodeSet(ctxt->context->node)); + if(OOM_FLAG) return(-1); + return (total); + } + + case XPATH_OP_RESET: { + if (op->ch1 != -1) + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); + CHECK_ERROR0; + + if (op->ch2 != -1) + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); + CHECK_ERROR0; + + ctxt->context->node = NULL; + return (total); + } + + case XPATH_OP_COLLECT: { + if (op->ch1 == -1) + return (total); + + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); + if(OOM_FLAG) return(-1); + CHECK_ERROR0; + + /* + * Optimization for [n] selection where n is a number + */ + if ((op->ch2 != -1) && + (comp->steps[op->ch2].op == XPATH_OP_PREDICATE) && + (comp->steps[op->ch2].ch1 == -1) && + (comp->steps[op->ch2].ch2 != -1) && + (comp->steps[comp->steps[op->ch2].ch2].op == XPATH_OP_VALUE)) + { + xmlXPathObjectPtr val; + + val = (xmlXPathObjectPtr)comp->steps[comp->steps[op->ch2].ch2].value4; + if ((val != NULL) && (val->type == XPATH_NUMBER)) { + int indx = (int) val->floatval; + + if (val->floatval == (float) indx) { + total += xmlXPathNodeCollectAndTestNth(ctxt, op, indx, NULL, NULL); + if(OOM_FLAG) return(-1); + return (total); + } + } + } + + total += xmlXPathNodeCollectAndTest(ctxt, op, NULL, NULL); + if(OOM_FLAG) return(-1); + return (total); + } + + case XPATH_OP_VALUE: { + valuePush(ctxt, xmlXPathObjectCopy((xmlXPathObjectPtr) op->value4)); + return (total); + } + + case XPATH_OP_VARIABLE: { + xmlXPathObjectPtr val; + + if (op->ch1 != -1) + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); + + if (op->value5 == NULL) { + val = xmlXPathVariableLookup(ctxt->context, (xmlChar*) op->value4); + if (val == NULL) { + ctxt->error = XPATH_UNDEF_VARIABLE_ERROR; + return(0); + } + valuePush(ctxt, val); + } else { + const xmlChar *URI; + + URI = xmlXPathNsLookup(ctxt->context, (xmlChar*) op->value5); + if (URI == NULL) { + xmlGenericError(xmlGenericErrorContext, + EMBED_ERRTXT("xmlXPathCompOpEval: variable %s bound to undefined prefix %s\n"), + op->value4, op->value5); + return (total); + } + val = xmlXPathVariableLookupNS(ctxt->context, (xmlChar*) op->value4, URI); + if (val == NULL) { + ctxt->error = XPATH_UNDEF_VARIABLE_ERROR; + return(0); + } + valuePush(ctxt, val); + } + return (total); + } + + case XPATH_OP_FUNCTION: { + xmlXPathFunction func; + const xmlChar *oldFunc, *oldFuncURI; + int i; + + if (op->ch1 != -1) + { + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); + if(OOM_FLAG) return(-1); + } + + if (ctxt->valueNr < op->value) { + xmlGenericError(xmlGenericErrorContext, EMBED_ERRTXT("xmlXPathCompOpEval: parameter error\n")); + ctxt->error = XPATH_INVALID_OPERAND; + return (total); + } + + for (i = 0; i < op->value; i++) + if (ctxt->valueTab[(ctxt->valueNr - 1) - i] == NULL) { + xmlGenericError(xmlGenericErrorContext, EMBED_ERRTXT("xmlXPathCompOpEval: parameter error\n")); + ctxt->error = XPATH_INVALID_OPERAND; + return (total); + } + + if (op->cache != NULL){ + func = (xmlXPathFunction)op->cache;//(REINTERPRET_CAST(xmlXPathFunction,(op->cache))); + }else { + const xmlChar *URI = NULL; + + if (op->value5 == NULL) + func = xmlXPathFunctionLookup(ctxt->context, (xmlChar*)op->value4); + else { + URI = xmlXPathNsLookup(ctxt->context, (xmlChar*) op->value5); + if (URI == NULL) { + xmlGenericError(xmlGenericErrorContext, + EMBED_ERRTXT("xmlXPathCompOpEval: function %s bound to undefined prefix %s\n"), + op->value4, op->value5); + return (total); + } + func = xmlXPathFunctionLookupNS(ctxt->context, (xmlChar*)op->value4, URI); + } + + if (func == NULL) { + xmlGenericError(xmlGenericErrorContext, + EMBED_ERRTXT("xmlXPathCompOpEval: function %s not found\n"), op->value4); + XP_ERROR0(XPATH_UNKNOWN_FUNC_ERROR); + } + + op->cache = (void *) func; + op->cacheURI = (void *) URI; + } // if (op->cache != NULL) + + oldFunc = ctxt->context->function; + oldFuncURI = ctxt->context->functionURI; + ctxt->context->function = (xmlChar*) op->value4; + ctxt->context->functionURI = (xmlChar*) op->cacheURI; + +#ifdef XMLENGINE_XFORMS_EXTENSIONS + addNodeSetsFromStackToDependencyList(ctxt, op->value); +#endif + func(ctxt, op->value); + if(OOM_FLAG) return(-1); + ctxt->context->function = oldFunc; + ctxt->context->functionURI = oldFuncURI; + return (total); + } + + case XPATH_OP_ARG: { + bakd = ctxt->context->doc; + bak = ctxt->context->node; + if (op->ch1 != -1) + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); + ctxt->context->doc = bakd; + ctxt->context->node = bak; + CHECK_ERROR0; + + if (op->ch2 != -1) { + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); + if(OOM_FLAG) return(-1); + ctxt->context->doc = bakd; + ctxt->context->node = bak; + CHECK_ERROR0; + } + return (total); + } + + case XPATH_OP_PREDICATE: + case XPATH_OP_FILTER: { + xmlXPathObjectPtr res; + xmlXPathObjectPtr obj, tmp; + xmlNodeSetPtr newset = NULL; + xmlNodeSetPtr oldset; + xmlNodePtr oldnode; + int i; + + /* + * Optimization for ()[1] selection i.e. the first elem + */ + if ((op->ch1 != -1) && (op->ch2 != -1) && + (comp->steps[op->ch1].op == XPATH_OP_SORT) && + (comp->steps[op->ch2].op == XPATH_OP_VALUE)) + { + xmlXPathObjectPtr val; + + val = (xmlXPathObjectPtr)comp->steps[op->ch2].value4; + + if ((val != NULL) && (val->type == XPATH_NUMBER) && (val->floatval == 1.0)) + { + xmlNodePtr first = NULL; + + total += xmlXPathCompOpEvalFirst(ctxt, &comp->steps[op->ch1], &first); + CHECK_ERROR0; + /* + * The nodeset should be in document order, + * Keep only the first value + */ + if ((ctxt->value != NULL) && + (ctxt->value->type == XPATH_NODESET) && + (ctxt->value->nodesetval != NULL) && + (ctxt->value->nodesetval->nodeNr > 1)) + { + ctxt->value->nodesetval->nodeNr = 1; + } + return (total); + } + } + + /* + * Optimization for ()[last()] selection i.e. the last elem + */ + if ((op->ch1 != -1) && (op->ch2 != -1) && + (comp->steps[op->ch1].op == XPATH_OP_SORT) && + (comp->steps[op->ch2].op == XPATH_OP_SORT)) + { + int f = comp->steps[op->ch2].ch1; + + if ((f != -1) && + (comp->steps[f].op == XPATH_OP_FUNCTION) && + (comp->steps[f].value5 == NULL) && + (comp->steps[f].value == 0) && + (comp->steps[f].value4 != NULL) && + (xmlStrEqual((xmlChar*)comp->steps[f].value4, BAD_CAST "last"))) + { + xmlNodePtr last = NULL; + + total += xmlXPathCompOpEvalLast(ctxt, &comp->steps[op->ch1], &last); + CHECK_ERROR0; + /* + * The nodeset should be in document order, + * Keep only the last value + */ + if ((ctxt->value != NULL) && + (ctxt->value->type == XPATH_NODESET) && + (ctxt->value->nodesetval != NULL) && + (ctxt->value->nodesetval->nodeTab != NULL) && + (ctxt->value->nodesetval->nodeNr > 1)) + { + ctxt->value->nodesetval->nodeTab[0] = + ctxt->value->nodesetval->nodeTab[ctxt->value->nodesetval->nodeNr - 1]; + ctxt->value->nodesetval->nodeNr = 1; + } + return (total); + } + } + + + if (op->ch1 != -1) + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); + + CHECK_ERROR0; + + if (op->ch2 == -1) + return (total); + + if (ctxt->value == NULL) + return (total); + + oldnode = ctxt->context->node; + +#ifdef LIBXML_XPTR_ENABLED + /* + * Hum are we filtering the result of an XPointer expression + */ + if (ctxt->value->type == XPATH_LOCATIONSET) + { + xmlLocationSetPtr newlocset = NULL; + xmlLocationSetPtr oldlocset; + + /* + * Extract the old locset, and then evaluate the result of the + * expression for all the element in the locset. use it to grow + * up a new locset. + */ + CHECK_TYPE0(XPATH_LOCATIONSET); + + obj = valuePop(ctxt); + oldlocset = obj->user; + ctxt->context->node = NULL; + + if ((oldlocset == NULL) || (oldlocset->locNr == 0)) { + ctxt->context->contextSize = 0; + ctxt->context->proximityPosition = 0; + + if (op->ch2 != -1) + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); + + res = valuePop(ctxt); + + if (res != NULL) + xmlXPathFreeObject(res); + + valuePush(ctxt, obj); + CHECK_ERROR0; + + return (total); + } + + newlocset = xmlXPtrLocationSetCreate(NULL); + + for (i = 0; i < oldlocset->locNr; i++) + { + /* + * Run the evaluation with a node list made of a + * single item in the nodelocset. + */ + ctxt->context->node = oldlocset->locTab[i]->user; + ctxt->context->contextSize = oldlocset->locNr; + ctxt->context->proximityPosition = i + 1; + tmp = xmlXPathNewNodeSet(ctxt->context->node); + valuePush(ctxt, tmp); + + if (op->ch2 != -1) + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); + + CHECK_ERROR0; + /* + * The result of the evaluation need to be tested to + * decided whether the filter succeeded or not + */ + res = valuePop(ctxt); + if (xmlXPathEvaluatePredicateResult(ctxt, res)) + { + xmlXPtrLocationSetAdd(newlocset, xmlXPathObjectCopy(oldlocset->locTab[i])); + } + + /* + * Cleanup + */ + if (res != NULL) + xmlXPathFreeObject(res); + if (ctxt->value == tmp) { + res = valuePop(ctxt); + xmlXPathFreeObject(res); + } + + ctxt->context->node = NULL; + } // for (i = 0; i < oldlocset->locNr; i++) + + /* + * The result is used as the new evaluation locset. + */ + xmlXPathFreeObject(obj); + ctxt->context->node = NULL; + ctxt->context->contextSize = -1; + ctxt->context->proximityPosition = -1; + valuePush(ctxt, xmlXPtrWrapLocationSet(newlocset)); + ctxt->context->node = oldnode; + return (total); + } +#endif /* LIBXML_XPTR_ENABLED */ + + /* + * Extract the old set, and then evaluate the result of the + * expression for all the element in the set. use it to grow + * up a new set. + */ + CHECK_TYPE0(XPATH_NODESET); + + obj = valuePop(ctxt); + oldset = obj->nodesetval; + oldnode = ctxt->context->node; + ctxt->context->node = NULL; + + if ((oldset == NULL) || (oldset->nodeNr == 0)) + { + ctxt->context->contextSize = 0; + ctxt->context->proximityPosition = 0; + + if (op->ch2 != -1) + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); + + CHECK_ERROR0; + + res = valuePop(ctxt); + if (res != NULL) + xmlXPathFreeObject(res); + + valuePush(ctxt, obj); + ctxt->context->node = oldnode; + CHECK_ERROR0; + } else { + /* + * Initialize the new set. + */ + newset = xmlXPathNodeSetCreate(NULL); + if(OOM_FLAG) return(-1); + + for (i = 0; i < oldset->nodeNr; i++) { + /* + * Run the evaluation with a node list made of + * a single item in the nodeset. + */ + ctxt->context->node = oldset->nodeTab[i]; + tmp = xmlXPathNewNodeSet(ctxt->context->node); + valuePush(ctxt, tmp); + ctxt->context->contextSize = oldset->nodeNr; + ctxt->context->proximityPosition = i + 1; + + if (op->ch2 != -1) + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); + + CHECK_ERROR0; + + /* + * The result of the evaluation needs to be tested to + * decide whether the filter succeeded or not + */ + res = valuePop(ctxt); + if (xmlXPathEvaluatePredicateResult(ctxt, res)) + { + xmlXPathNodeSetAdd(newset, oldset->nodeTab[i]); + } + + /* + * Cleanup + */ + if (res != NULL) + xmlXPathFreeObject(res); + if (ctxt->value == tmp) { + res = valuePop(ctxt); + xmlXPathFreeObject(res); + } + + ctxt->context->node = NULL; + } // (i = 0; i < oldset->nodeNr; i++) + + /* + * The result is used as the new evaluation set. + */ + xmlXPathFreeObject(obj); + ctxt->context->node = NULL; + ctxt->context->contextSize = -1; + ctxt->context->proximityPosition = -1; + valuePush(ctxt, xmlXPathWrapNodeSet(newset)); + } + ctxt->context->node = oldnode; + return (total); + } + + case XPATH_OP_SORT: { + if (op->ch1 != -1) + { + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); + if(OOM_FLAG) return(-1); + } + + CHECK_ERROR0; + + if ((ctxt->value != NULL) && + (ctxt->value->type == XPATH_NODESET) && + (ctxt->value->nodesetval != NULL)) + { + xmlXPathNodeSetSort(ctxt->value->nodesetval); + } + return (total); + } + +#ifdef LIBXML_XPTR_ENABLED + case XPATH_OP_RANGETO: { + xmlXPathObjectPtr range; + xmlXPathObjectPtr res, obj; + xmlXPathObjectPtr tmp; + xmlLocationSetPtr newlocset = NULL; + xmlLocationSetPtr oldlocset; + xmlNodeSetPtr oldset; + int i, j; + + if (op->ch1 != -1) + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch1]); + if (op->ch2 == -1) + return (total); + + if (ctxt->value->type == XPATH_LOCATIONSET) + { + /* + * Extract the old locset, and then evaluate the result of the + * expression for all the element in the locset. use it to grow + * up a new locset. + */ + CHECK_TYPE0(XPATH_LOCATIONSET); + obj = valuePop(ctxt); + oldlocset = obj->user; + + if ((oldlocset == NULL) || (oldlocset->locNr == 0)) { + ctxt->context->node = NULL; + ctxt->context->contextSize = 0; + ctxt->context->proximityPosition = 0; + + total += xmlXPathCompOpEval(ctxt,&comp->steps[op->ch2]); + + res = valuePop(ctxt); + if (res != NULL) + xmlXPathFreeObject(res); + valuePush(ctxt, obj); + CHECK_ERROR0; + return (total); + } + newlocset = xmlXPtrLocationSetCreate(NULL); + + for (i = 0; i < oldlocset->locNr; i++) { + /* + * Run the evaluation with a node list made of a + * single item in the nodelocset. + */ + ctxt->context->node = oldlocset->locTab[i]->user; + ctxt->context->contextSize = oldlocset->locNr; + ctxt->context->proximityPosition = i + 1; + tmp = xmlXPathNewNodeSet(ctxt->context->node); + valuePush(ctxt, tmp); + + if (op->ch2 != -1) + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); + + CHECK_ERROR0; + + res = valuePop(ctxt); + if (res->type == XPATH_LOCATIONSET) + { + xmlLocationSetPtr rloc = (xmlLocationSetPtr)res->user; + + for (j=0; jlocNr; j++) { + range = xmlXPtrNewRange( + oldlocset->locTab[i]->user, + oldlocset->locTab[i]->index, + rloc->locTab[j]->user2, + rloc->locTab[j]->index2); + + if (range != NULL) { + xmlXPtrLocationSetAdd(newlocset, range); + } + } + } else { + range = xmlXPtrNewRangeNodeObject((xmlNodePtr)oldlocset->locTab[i]->user, res); + if (range != NULL) { + xmlXPtrLocationSetAdd(newlocset,range); + } + } + + /* + * Cleanup + */ + if (res != NULL) + xmlXPathFreeObject(res); + if (ctxt->value == tmp) { + res = valuePop(ctxt); + xmlXPathFreeObject(res); + } + + ctxt->context->node = NULL; + } + + } + else + { /* Not a location set */ + CHECK_TYPE0(XPATH_NODESET); + obj = valuePop(ctxt); + oldset = obj->nodesetval; + ctxt->context->node = NULL; + + newlocset = xmlXPtrLocationSetCreate(NULL); + + if (oldset != NULL) { + for (i = 0; i < oldset->nodeNr; i++) { + /* + * Run the evaluation with a node list made of a single item + * in the nodeset. + */ + ctxt->context->node = oldset->nodeTab[i]; + tmp = xmlXPathNewNodeSet(ctxt->context->node); + valuePush(ctxt, tmp); + + if (op->ch2 != -1) + total += xmlXPathCompOpEval(ctxt, &comp->steps[op->ch2]); + + CHECK_ERROR0; + + res = valuePop(ctxt); + range = xmlXPtrNewRangeNodeObject(oldset->nodeTab[i], res); + if (range != NULL) { + xmlXPtrLocationSetAdd(newlocset, range); + } + + /* + * Cleanup + */ + if (res != NULL) + xmlXPathFreeObject(res); + if (ctxt->value == tmp) { + res = valuePop(ctxt); + xmlXPathFreeObject(res); + } + + ctxt->context->node = NULL; + } // for + } + } + + /* + * The result is used as the new evaluation set. + */ + xmlXPathFreeObject(obj); + ctxt->context->node = NULL; + ctxt->context->contextSize = -1; + ctxt->context->proximityPosition = -1; + valuePush(ctxt, xmlXPtrWrapLocationSet(newlocset)); + return (total); + } +#endif /* LIBXML_XPTR_ENABLED */ + } // switch(op->op) + + // None of options matched + xmlGenericError(xmlGenericErrorContext, EMBED_ERRTXT("XPath: unknown precompiled operation %d\n"), op->op); + return (total); +} + +/** +* xmlXPathRunEval: +* @ctxt: the XPath parser context with the compiled expression +* +* Evaluate the Precompiled XPath expression in the given context. +*/ +static void +xmlXPathRunEval(xmlXPathParserContextPtr ctxt) { + xmlXPathCompExprPtr comp; + + if ((ctxt == NULL) || (ctxt->comp == NULL)) + return; + + if (ctxt->valueTab == NULL) { + /* Allocate the value stack */ + // TODO: Check what's the "magic" number here / Make a setup value + ctxt->valueTab = (xmlXPathObjectPtr *) + xmlMalloc(10 * sizeof(xmlXPathObjectPtr)); + if (ctxt->valueTab == NULL) { + xmlXPathPErrMemory(ctxt, EMBED_ERRTXT("creating evaluation context\n")); + xmlFree(ctxt); + } + ctxt->valueNr = 0; + ctxt->valueMax = 10; + ctxt->value = NULL; + } + comp = ctxt->comp; + if(comp->last < 0) { + xmlGenericError(xmlGenericErrorContext, EMBED_ERRTXT("xmlXPathRunEval: last is less than zero\n")); + return; + + } + xmlXPathCompOpEval(ctxt, &comp->steps[comp->last]); +} + +/************************************************************************ + * * + * Public interfaces * + * * + ************************************************************************/ + +/** + * xmlXPathEvalPredicate: + * @ctxt: the XPath context + * @res: the Predicate Expression evaluation result + * + * Evaluate a predicate result for the current node. + * A PredicateExpr is evaluated by evaluating the Expr and converting + * the result to a boolean. If the result is a number, the result will + * be converted to true if the number is equal to the position of the + * context node in the context node list (as returned by the position + * function) and will be converted to false otherwise; if the result + * is not a number, then the result will be converted as if by a call + * to the boolean function. + * + * Returns 1 if predicate is true, 0 otherwise + */ +int +xmlXPathEvalPredicate(xmlXPathContextPtr ctxt, xmlXPathObjectPtr res) { + if (res == NULL) return(0); + switch (res->type) { + case XPATH_BOOLEAN: + return(res->boolval); + case XPATH_NUMBER: + return(res->floatval == ctxt->proximityPosition); + case XPATH_NODESET: + case XPATH_XSLT_TREE: + return res->nodesetval + ? + res->nodesetval->nodeNr != 0 + : 0; + case XPATH_STRING: + return + res->stringval && + xmlStrlen(res->stringval) != 0; + default: + STRANGE + } + return(0); +} + +/** + * xmlXPathEvaluatePredicateResult: + * @ctxt: the XPath Parser context + * @res: the Predicate Expression evaluation result + * + * Evaluate a predicate result for the current node. + * A PredicateExpr is evaluated by evaluating the Expr and converting + * the result to a boolean. If the result is a number, the result will + * be converted to true if the number is equal to the position of the + * context node in the context node list (as returned by the position + * function) and will be converted to false otherwise; if the result + * is not a number, then the result will be converted as if by a call + * to the boolean function. + * + * Returns 1 if predicate is true, 0 otherwise + */ +int +xmlXPathEvaluatePredicateResult(xmlXPathParserContextPtr ctxt, + xmlXPathObjectPtr res) { + if (res == NULL) return(0); + switch (res->type) { + case XPATH_BOOLEAN: + return(res->boolval); + case XPATH_NUMBER: +#if defined(__BORLANDC__) || (defined(_MSC_VER) && (_MSC_VER == 1200)) + return((res->floatval == ctxt->context->proximityPosition) && + (!xmlXPathIsNaN(res->floatval))); /* MSC pbm Mark Vakoc !*/ +#else + return(res->floatval == ctxt->context->proximityPosition); +#endif + case XPATH_NODESET: + case XPATH_XSLT_TREE: + if (res->nodesetval == NULL) + return(0); + return(res->nodesetval->nodeNr != 0); + case XPATH_STRING: + return((res->stringval != NULL) && + (xmlStrlen(res->stringval) != 0)); +#ifdef LIBXML_XPTR_ENABLED + case XPATH_LOCATIONSET:{ + xmlLocationSetPtr ptr = res->user; + if (ptr == NULL) + return(0); + return (ptr->locNr != 0); + } +#endif + default: + STRANGE + } + return(0); +} + +/** + * xmlXPathCtxtCompile: + * @ctxt: an XPath context + * @str: the XPath expression + * + * Compile an XPath expression + * + * Returns the xmlXPathCompExprPtr resulting from the compilation or NULL. + * the caller has to free the object. + */ +xmlXPathCompExprPtr + +xmlXPathCtxtCompile(xmlXPathContextPtr ctxt, const xmlChar *str) { + xmlXPathParserContextPtr pctxt; + xmlXPathCompExprPtr comp; + + xmlXPathInit(); + + pctxt = xmlXPathNewParserContext(str, ctxt); + if(OOM_FLAG) return(NULL); + xmlXPathCompileExpr(pctxt); + if(OOM_FLAG) + { + xmlXPathFreeParserContext(pctxt); + return(NULL); + } + if( pctxt->error != XPATH_EXPRESSION_OK ) + { + xmlXPathFreeParserContext(pctxt); + return (0); + } + + if (*pctxt->cur != 0) { + /* + * aleksey: in some cases this line prints *second* error message + * (see bug #78858) and probably this should be fixed. + * However, we are not sure that all error messages are printed + * out in other places. It's not critical so we leave it as-is for now + */ + xmlXPatherror(pctxt, __FILE__, __LINE__, XPATH_EXPR_ERROR); + comp = NULL; + } else { + comp = pctxt->comp; + pctxt->comp = NULL; + } + xmlXPathFreeParserContext(pctxt); + if (comp != NULL) { + comp->expr = xmlStrdup(str); +#ifdef DEBUG_EVAL_COUNTS + comp->string = xmlStrdup(str); + comp->nb = 0; +#endif + } + return(comp); +} + +/** + * xmlXPathCompile: + * @str: the XPath expression + * + * Compile an XPath expression + * + * Returns the xmlXPathCompExprPtr resulting from the compilation or NULL. + * the caller has to free the object. + */ +xmlXPathCompExprPtr +xmlXPathCompile(const xmlChar *str) { + return(xmlXPathCtxtCompile(NULL, str)); +} + +/** + * xmlXPathCompiledEval: + * @comp: the compiled XPath expression + * @ctx: the XPath context + * + * Evaluate the Precompiled XPath expression in the given context. + * + * Returns the xmlXPathObjectPtr resulting from the evaluation or NULL. + * the caller has to free the object. + */ +xmlXPathObjectPtr +xmlXPathCompiledEval(xmlXPathCompExprPtr comp, xmlXPathContextPtr ctx) { + xmlXPathParserContextPtr ctxt; + xmlXPathObjectPtr res, tmp, init = NULL; + int stack = 0; +#ifndef LIBXML_THREAD_ENABLED + //FIXIT + //static + int reentance = 0; +#endif + + if ((comp == NULL) || (ctx == NULL)) + return(NULL); + xmlXPathInit(); + // TODO: CHECK_CONTEXT -- Replace macro with a function (too big for reuse more then once) + CHECK_CONTEXT(ctx) + +#ifndef LIBXML_THREAD_ENABLED + reentance++; + if (reentance > 1) + xmlXPathDisableOptimizer = 1; +#endif + +#ifdef DEBUG_EVAL_COUNTS + comp->nb++; + if ((comp->string != NULL) && (comp->nb > 100)) { + fprintf(stderr, "100 x %s\n", comp->string); + comp->nb = 0; + } +#endif + ctxt = xmlXPathCompParserContext(comp, ctx); + xmlXPathRunEval(ctxt); //might set OOM flag + if(OOM_FLAG) + { + if(ctxt) + { + ctxt->comp = NULL; + xmlXPathFreeParserContext(ctxt); + } + return(NULL); + } + + if (ctxt->value == NULL) { + xmlGenericError(xmlGenericErrorContext, + EMBED_ERRTXT("xmlXPathCompiledEval: evaluation failed\n")); + res = NULL; + } else { + res = valuePop(ctxt); + } + + + do { + tmp = valuePop(ctxt); + if (tmp != NULL) { + if (tmp != init) + stack++; + xmlXPathFreeObject(tmp); + } + } while (tmp != NULL); + if ((stack != 0) && (res != NULL)) { + xmlGenericError(xmlGenericErrorContext, + EMBED_ERRTXT("xmlXPathCompiledEval: %d object left on the stack\n"), + stack); + } + if (ctxt->error != XPATH_EXPRESSION_OK) { + xmlXPathFreeObject(res); + res = NULL; + } + + + ctxt->comp = NULL; + xmlXPathFreeParserContext(ctxt); +#ifndef LIBXML_THREAD_ENABLED + reentance--; +#endif + return(res); +} + +/** + * xmlXPathEvalExpr: + * @ctxt: the XPath Parser context + * + * Parse and evaluate an XPath expression in the given context, + * then push the result on the context stack + * + * OOM: possible --> check OOM flag + */ +void +xmlXPathEvalExpr(xmlXPathParserContextPtr ctxt) { + xmlXPathCompileExpr(ctxt); + CHECK_ERROR; + xmlXPathRunEval(ctxt); +} + +/** + * xmlXPathEval: + * @str: the XPath expression + * @ctx: the XPath context + * + * Evaluate the XPath Location Path in the given context. + * + * Returns the xmlXPathObjectPtr resulting from the evaluation or NULL. + * the caller has to free the object. + */ +xmlXPathObjectPtr +xmlXPathEval(const xmlChar *str, xmlXPathContextPtr ctx) { + xmlXPathParserContextPtr ctxt; + xmlXPathObjectPtr res, tmp, init = NULL; + int stack = 0; + + xmlXPathInit(); + + CHECK_CONTEXT(ctx) + + ctxt = xmlXPathNewParserContext(str, ctx); + xmlXPathEvalExpr(ctxt); + + if (ctxt->value == NULL) { + xmlGenericError(xmlGenericErrorContext, + EMBED_ERRTXT("xmlXPathEval: evaluation failed\n")); + res = NULL; + } else if (*ctxt->cur != 0) { + xmlXPatherror(ctxt, __FILE__, __LINE__, XPATH_EXPR_ERROR); + res = NULL; + } else { + res = valuePop(ctxt); + } + + do { + tmp = valuePop(ctxt); + if (tmp != NULL) { + if (tmp != init) + stack++; + xmlXPathFreeObject(tmp); + } + } while (tmp != NULL); + if ((stack != 0) && (res != NULL)) { + xmlGenericError(xmlGenericErrorContext, + EMBED_ERRTXT("xmlXPathEval: %d object left on the stack\n"), + stack); + } + if (ctxt->error != XPATH_EXPRESSION_OK) { + xmlXPathFreeObject(res); + res = NULL; + } + + xmlXPathFreeParserContext(ctxt); + return(res); +} + +/** + * xmlXPathEvalExpression: + * @str: the XPath expression + * @ctxt: the XPath context + * + * Evaluate the XPath expression in the given context. + * + * Returns the xmlXPathObjectPtr resulting from the evaluation or NULL. + * the caller has to free the object. + */ +xmlXPathObjectPtr +xmlXPathEvalExpression(const xmlChar *str, xmlXPathContextPtr ctxt) { + xmlXPathParserContextPtr pctxt; + xmlXPathObjectPtr res, tmp; + int stack = 0; + + xmlXPathInit(); + + CHECK_CONTEXT(ctxt) + + pctxt = xmlXPathNewParserContext(str, ctxt); + xmlXPathEvalExpr(pctxt); + + if (*pctxt->cur != 0) { + xmlXPatherror(pctxt, __FILE__, __LINE__, XPATH_EXPR_ERROR); + res = NULL; + } else { + res = valuePop(pctxt); + } + + do { + tmp = valuePop(pctxt); + if (tmp != NULL) { + xmlXPathFreeObject(tmp); + stack++; + } + } while (tmp != NULL); + + if ((stack != 0) && (res != NULL)) { + xmlGenericError(xmlGenericErrorContext, + EMBED_ERRTXT("xmlXPathEvalExpression: %d object left on the stack\n"), + stack); + } + xmlXPathFreeParserContext(pctxt); + return(res); +} + +#ifdef XMLENGINE_XFORMS_EXTENSIONS + +/* First initialises static nodeset variable from deplist (argument). +* Calls xmlXPathCompiledEval. If the result is a nodeset it is copied +* to the deplist. Otherwise modifications in xmlXPathCompOpEval have +* already filled deplist. +*/ +xmlXPathObjectPtr +xmlXPathCompiledEvalWithDependencies(xmlXPathCompExprPtr comp, xmlXPathContextPtr ctx, xmlNodeSetPtr deplist) +{ + xmlXPathObjectPtr res = NULL; + ctx->dependencyList = deplist; + res = xmlXPathCompiledEval(comp, ctx); + + /* if the result is nodeset there are no other dependencies */ + if (res != NULL && res->type == XPATH_NODESET) { + if (!xmlXPathNodeSetIsEmpty(deplist)) { + ;/* this should not happen */ + } + xmlXPathNodeSetMerge(deplist, res->nodesetval); + // KO: moved out of IF block // xmlXPathNodeSetSort(deplist); + } + // KO: moved out of IF block //else xmlXPathNodeSetSort(deplist); + + xmlXPathNodeSetSort(deplist); /* dep has been filled with nodes */ + + ctx->dependencyList = NULL; + + return res; +} + +/* First pops of nargs values from stack (ctxt) and stores them in temporary +* array. Adds all values of type nodeset to deplist and pushes everything back +* on the stack. +*/ +void addNodeSetsFromStackToDependencyList(xmlXPathParserContextPtr ctxt, int nargs) +{ + xmlNodeSetPtr deplist = ctxt->context->dependencyList; +#define MAXTMPSTACK 10 + xmlXPathObjectPtr tmpStack[MAXTMPSTACK] = {0,0,0,0,0,0,0,0,0,0}; + int i=0; + + if(!deplist) return; + + // TODO: improve code + // KO: If to decide number of popped elements first (min(nargs,MAXTMPSTACK)) + // then no need to prefill tmpStack with zeros and make checks in the second loop + /* copy all arguments of type nodeset to deplist */ + // KO: it is better not to pop and push arguments back, but rather PEEK the values from + // the internal stack: PEEK(i) = ctxt->valueTab[ctxt->valueNr - i - 1]; + // where 'i=1' is the index of the top-most element on the stack + for (i=0; (i < nargs) && (i < MAXTMPSTACK); i++) { + tmpStack[i] = valuePop(ctxt); + } + + for (i= MAXTMPSTACK-1; i>=0 ; i--) { + if (tmpStack[i] != NULL) { + if (tmpStack[i]->type == XPATH_NODESET) + xmlXPathNodeSetMerge(deplist, tmpStack[i]->nodesetval); + valuePush(ctxt, tmpStack[i]); + } + } + +#define p__enable_this_test +#ifdef __enable_this_test + // TODO: OPTIMIZE: try how this new version of addNodeSetsFromStackToDependencyList works + xmlXPathObjectPtr* stack = ctxt->valueTab; + int index = ctxt->valueNr - 1; + for (i= 0; i < nargs ; i++) { + xmlXPathObjectPtr obj = stack[index--]; + if (obj->type == XPATH_NODESET) + xmlXPathNodeSetMerge(deplist, obj->nodesetval); + } +#endif + +#undef __enable_this_test +} + +/* + * xmlXFormsInstanceFunction: + * @ctxt: the XPath Parser context + * @nargs: the number of arguments + * + * Implement the instance() XForms function + * nodeset instance(string) + */ +void +xmlXFormsInstanceFunction(xmlXPathParserContextPtr ctxt, int nargs) { + xmlXPathObjectPtr cur = NULL; + xmlXPathObjectPtr ret = NULL; + xmlDocPtr doc = NULL; + + CHECK_ARITY(1); + cur = valuePop(ctxt); + if (cur == NULL) + XP_ERROR(XPATH_INVALID_OPERAND); + + /* convert argument to string */ + cur = xmlXPathConvertString(cur); + + /* TODO: get document from store */ + if (ctxt->context->instanceDocs) + { + doc = (xmlDocPtr)xmlHashLookup(ctxt->context->instanceDocs, cur->stringval); + } + + /* create a node set and change context, which will be reset by + the operations: AND, OR, EQUAL, CMP, MULT, UNION, ARG */ + if (doc) + { + ctxt->context->doc = doc; + ctxt->context->node = xmlDocGetRootElement(doc); + ret = xmlXPathNewNodeSet(ctxt->context->node); + } + else + { + ret = xmlXPathNewNodeSet(NULL); + } + + /* push the instance on the stack */ + valuePush(ctxt, ret); + + /* free cur*/ + xmlXPathFreeObject(cur); +} + + +#endif // XMLENGINE_XFROMS_EXTENSIONS + +/************************************************************************ + * * + * Extra functions not pertaining to the XPath spec * + * * + ************************************************************************/ +/** + * xmlXPathEscapeUriFunction: + * @ctxt: the XPath Parser context + * @nargs: the number of arguments + * + * Implement the escape-uri() XPath function + * string escape-uri(string $str, bool $escape-reserved) + * + * This function applies the URI escaping rules defined in section 2 of [RFC + * 2396] to the string supplied as $uri-part, which typically represents all + * or part of a URI. The effect of the function is to replace any special + * character in the string by an escape sequence of the form %xx%yy..., + * where xxyy... is the hexadecimal representation of the octets used to + * represent the character in UTF-8. + * + * The set of characters that are escaped depends on the setting of the + * boolean argument $escape-reserved. + * + * If $escape-reserved is true, all characters are escaped other than lower + * case letters a-z, upper case letters A-Z, digits 0-9, and the characters + * referred to in [RFC 2396] as "marks": specifically, "-" | "_" | "." | "!" + * | "~" | "*" | "'" | "(" | ")". The "%" character itself is escaped only + * if it is not followed by two hexadecimal digits (that is, 0-9, a-f, and + * A-F). + * + * If $escape-reserved is false, the behavior differs in that characters + * referred to in [RFC 2396] as reserved characters are not escaped. These + * characters are ";" | "/" | "?" | ":" | "@" | "&" | "=" | "+" | "$" | ",". + * + * [RFC 2396] does not define whether escaped URIs should use lower case or + * upper case for hexadecimal digits. To ensure that escaped URIs can be + * compared using string comparison functions, this function must always use + * the upper-case letters A-F. + * + * Generally, $escape-reserved should be set to true when escaping a string + * that is to form a single part of a URI, and to false when escaping an + * entire URI or URI reference. + * + * In the case of non-ascii characters, the string is encoded according to + * utf-8 and then converted according to RFC 2396. + * + * Examples + * xf:escape-uri ("gopher://spinaltap.micro.umn.edu/00/Weather/California/Los%20Angeles#ocean"), true()) + * returns "gopher%3A%2F%2Fspinaltap.micro.umn.edu%2F00%2FWeather%2FCalifornia%2FLos%20Angeles%23ocean" + * xf:escape-uri ("gopher://spinaltap.micro.umn.edu/00/Weather/California/Los%20Angeles#ocean"), false()) + * returns "gopher://spinaltap.micro.umn.edu/00/Weather/California/Los%20Angeles%23ocean" + * + */ +static void +xmlXPathEscapeUriFunction(xmlXPathParserContextPtr ctxt, int nargs) { + xmlXPathObjectPtr str; + int escape_reserved; + xmlBufferPtr target; + xmlChar *cptr; + xmlChar escape[4]; + + CHECK_ARITY(2); + + escape_reserved = xmlXPathPopBoolean(ctxt); + + CAST_TO_STRING; + str = valuePop(ctxt); + + target = xmlBufferCreate(); + + escape[0] = '%'; + escape[3] = 0; + + if (target) { + for (cptr = str->stringval; *cptr; cptr++) { + if ((*cptr >= 'A' && *cptr <= 'Z') || + (*cptr >= 'a' && *cptr <= 'z') || + (*cptr >= '0' && *cptr <= '9') || + *cptr == '-' || *cptr == '_' || *cptr == '.' || + *cptr == '!' || *cptr == '~' || *cptr == '*' || + *cptr == '\''|| *cptr == '(' || *cptr == ')' || + (*cptr == '%' && + ((cptr[1] >= 'A' && cptr[1] <= 'F') || + (cptr[1] >= 'a' && cptr[1] <= 'f') || + (cptr[1] >= '0' && cptr[1] <= '9')) && + ((cptr[2] >= 'A' && cptr[2] <= 'F') || + (cptr[2] >= 'a' && cptr[2] <= 'f') || + (cptr[2] >= '0' && cptr[2] <= '9'))) || + (!escape_reserved && + (*cptr == ';' || *cptr == '/' || *cptr == '?' || + *cptr == ':' || *cptr == '@' || *cptr == '&' || + *cptr == '=' || *cptr == '+' || *cptr == '$' || + *cptr == ','))) + { + xmlBufferAdd(target, cptr, 1); + } else { + if ((*cptr >> 4) < 10) + escape[1] = '0' + (*cptr >> 4); + else + escape[1] = 'A' - 10 + (*cptr >> 4); + if ((*cptr & 0xF) < 10) + escape[2] = '0' + (*cptr & 0xF); + else + escape[2] = 'A' - 10 + (*cptr & 0xF); + + xmlBufferAdd(target, &escape[0], 3); + } + } + } + valuePush(ctxt, xmlXPathNewString(xmlBufferContent(target))); + xmlBufferFree(target); + xmlXPathFreeObject(str); +} + +/** + * xmlXPathRegisterAllFunctions: + * @ctxt: the XPath context + * + * Registers all default XPath functions in this context + * + * Returns 0 in case of success, -1 in case of error + */ +int +xmlXPathRegisterAllFunctions(xmlXPathContextPtr ctxt) +{ // TODO: CHECK OOM after all these and cleanup funcHash if needed + // TODO: return error code OR setup global OOM flag + if( xmlXPathRegisterFunc(ctxt, (const xmlChar*)"boolean", xmlXPathBooleanFunction) < 0) return(-1); + if( xmlXPathRegisterFunc(ctxt, (const xmlChar*)"ceiling", xmlXPathCeilingFunction) < 0) return(-1); + if( xmlXPathRegisterFunc(ctxt, (const xmlChar*)"count", xmlXPathCountFunction) < 0) return(-1); + if( xmlXPathRegisterFunc(ctxt, (const xmlChar*)"concat", xmlXPathConcatFunction) < 0) return(-1); + if( xmlXPathRegisterFunc(ctxt, (const xmlChar*)"contains",xmlXPathContainsFunction) < 0) return(-1); + if( xmlXPathRegisterFunc(ctxt, (const xmlChar*)"id", xmlXPathIdFunction) < 0) return(-1); + if( xmlXPathRegisterFunc(ctxt, (const xmlChar*)"false", xmlXPathFalseFunction) < 0) return(-1); + if( xmlXPathRegisterFunc(ctxt, (const xmlChar*)"floor", xmlXPathFloorFunction) < 0) return(-1); + if( xmlXPathRegisterFunc(ctxt, (const xmlChar*)"last", xmlXPathLastFunction) < 0) return(-1); + if( xmlXPathRegisterFunc(ctxt, (const xmlChar*)"lang", xmlXPathLangFunction) < 0) return(-1); + if( xmlXPathRegisterFunc(ctxt, (const xmlChar*)"local-name", xmlXPathLocalNameFunction) < 0) return(-1); + if( xmlXPathRegisterFunc(ctxt, (const xmlChar*)"not", xmlXPathNotFunction) < 0) return(-1); + if( xmlXPathRegisterFunc(ctxt, (const xmlChar*)"name", xmlXPathNameFunction) < 0) return(-1); + if( xmlXPathRegisterFunc(ctxt, (const xmlChar*)"namespace-uri", xmlXPathNamespaceURIFunction) < 0) return(-1); + if( xmlXPathRegisterFunc(ctxt, (const xmlChar*)"normalize-space", xmlXPathNormalizeFunction) < 0) return(-1); + if( xmlXPathRegisterFunc(ctxt, (const xmlChar*)"number", xmlXPathNumberFunction) < 0) return(-1); + if( xmlXPathRegisterFunc(ctxt, (const xmlChar*)"position", xmlXPathPositionFunction) < 0) return(-1); + if( xmlXPathRegisterFunc(ctxt, (const xmlChar*)"round", xmlXPathRoundFunction) < 0) return(-1); + if( xmlXPathRegisterFunc(ctxt, (const xmlChar*)"string", xmlXPathStringFunction) < 0) return(-1); + if( xmlXPathRegisterFunc(ctxt, (const xmlChar*)"string-length", xmlXPathStringLengthFunction) < 0) return(-1); + if( xmlXPathRegisterFunc(ctxt, (const xmlChar*)"starts-with", xmlXPathStartsWithFunction) < 0) return(-1); + if( xmlXPathRegisterFunc(ctxt, (const xmlChar*)"substring", xmlXPathSubstringFunction) < 0) return(-1); + if( xmlXPathRegisterFunc(ctxt, (const xmlChar*)"substring-before", xmlXPathSubstringBeforeFunction) < 0) return(-1); + if( xmlXPathRegisterFunc(ctxt, (const xmlChar*)"substring-after", xmlXPathSubstringAfterFunction) < 0) return(-1); + if( xmlXPathRegisterFunc(ctxt, (const xmlChar*)"sum", xmlXPathSumFunction) < 0) return(-1); + if( xmlXPathRegisterFunc(ctxt, (const xmlChar*)"true", xmlXPathTrueFunction) < 0) return(-1); + if( xmlXPathRegisterFunc(ctxt, (const xmlChar*)"translate", xmlXPathTranslateFunction) < 0) return(-1); + + if( xmlXPathRegisterFuncNS(ctxt, (const xmlChar *)"escape-uri", + (const xmlChar *)"http://www.w3.org/2002/08/xquery-functions", xmlXPathEscapeUriFunction) < 0) return(-1); + + // TODO: define special function that will register instance() function for XForms support +#ifdef XMLENGINE_XFORMS_EXTENSIONS + if( xmlXPathRegisterFunc(ctxt, (const xmlChar *)"instance", xmlXFormsInstanceFunction) < 0) return(-1); +#endif + return(0); +} + +#endif /* LIBXML_XPATH_ENABLED */ +