--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/xml/libxml2libs/src/libxml2/libxml2_c14n.c Thu Dec 17 09:29:21 2009 +0200
@@ -0,0 +1,2009 @@
+/*
+ * "Canonical XML" implementation
+ * http://www.w3.org/TR/xml-c14n
+ *
+ * "Exclusive XML Canonicalization" implementation
+ * http://www.w3.org/TR/xml-exc-c14n
+ *
+ * See Copyright for the status of this software.
+ *
+ * Author: Aleksey Sanin <aleksey@aleksey.com>
+ * Portion Copyright © 2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved.
+ */
+#define IN_LIBXML
+
+#include "xmlenglibxml.h"
+
+#if defined(LIBXML_OUTPUT_ENABLED) && defined(LIBXML_C14N_ENABLED)
+
+
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#include <string.h>
+
+#include <stdapis/libxml2/libxml2_globals.h>
+#include <stdapis/libxml2/libxml2_tree.h>
+#include <stdapis/libxml2/libxml2_parser.h>
+#include <stdapis/libxml2/libxml2_uri.h>
+#include <stdapis/libxml2/libxml2_xmlerror.h>
+#include "libxml2_xmlerror2.h"
+#include <stdapis/libxml2/libxml2_xpathinternals.h>
+#include <stdapis/libxml2/libxml2_c14n.h>
+
+/************************************************************************
+ * *
+ * Some declaration better left private ATM *
+ * *
+ ************************************************************************/
+
+typedef enum {
+ XMLC14N_BEFORE_DOCUMENT_ELEMENT = 0,
+ XMLC14N_INSIDE_DOCUMENT_ELEMENT = 1,
+ XMLC14N_AFTER_DOCUMENT_ELEMENT = 2
+} xmlC14NPosition;
+
+typedef struct _xmlC14NVisibleNsStack {
+ int nsCurEnd; /* number of nodes in the set */
+ int nsPrevStart; /* the begginning of the stack for previous visible node */
+ int nsPrevEnd; /* the end of the stack for previous visible node */
+ int nsMax; /* size of the array as allocated */
+ xmlNsPtr *nsTab; /* array of ns in no particular order */
+ xmlNodePtr *nodeTab;/* array of nodes in no particular order */
+} xmlC14NVisibleNsStack, *xmlC14NVisibleNsStackPtr;
+
+typedef struct _xmlC14NCtx {
+ /* input parameters */
+ xmlDocPtr doc;
+ xmlC14NIsVisibleCallback is_visible_callback;
+ void* user_data;
+ int with_comments;
+ xmlOutputBufferPtr buf;
+
+ /* position in the XML document */
+ xmlC14NPosition pos;
+ int parent_is_doc;
+ xmlC14NVisibleNsStackPtr ns_rendered;
+
+ /* exclusive canonicalization */
+ int exclusive;
+ xmlChar **inclusive_ns_prefixes;
+
+ /* error number */
+ int error;
+} xmlC14NCtx, *xmlC14NCtxPtr;
+
+static xmlC14NVisibleNsStackPtr xmlC14NVisibleNsStackCreate (void);
+static void xmlC14NVisibleNsStackDestroy (xmlC14NVisibleNsStackPtr cur);
+static void xmlC14NVisibleNsStackAdd (xmlC14NVisibleNsStackPtr cur,
+ xmlNsPtr ns,
+ xmlNodePtr node);
+static void xmlC14NVisibleNsStackSave (xmlC14NVisibleNsStackPtr cur,
+ xmlC14NVisibleNsStackPtr state);
+static void xmlC14NVisibleNsStackRestore (xmlC14NVisibleNsStackPtr cur,
+ xmlC14NVisibleNsStackPtr state);
+static void xmlC14NVisibleNsStackShift (xmlC14NVisibleNsStackPtr cur);
+static int xmlC14NVisibleNsStackFind (xmlC14NVisibleNsStackPtr cur,
+ xmlNsPtr ns);
+static int xmlExcC14NVisibleNsStackFind (xmlC14NVisibleNsStackPtr cur,
+ xmlNsPtr ns,
+ xmlC14NCtxPtr ctx);
+
+static int xmlC14NIsNodeInNodeset (xmlNodeSetPtr nodes,
+ xmlNodePtr node,
+ xmlNodePtr parent);
+
+
+
+static int xmlC14NProcessNode(xmlC14NCtxPtr ctx, xmlNodePtr cur);
+static int xmlC14NProcessNodeList(xmlC14NCtxPtr ctx, xmlNodePtr cur);
+typedef enum {
+ XMLC14N_NORMALIZE_ATTR = 0,
+ XMLC14N_NORMALIZE_COMMENT = 1,
+ XMLC14N_NORMALIZE_PI = 2,
+ XMLC14N_NORMALIZE_TEXT = 3
+} xmlC14NNormalizationMode;
+
+static xmlChar *xmlC11NNormalizeString(const xmlChar * input,
+ xmlC14NNormalizationMode mode);
+
+#define xmlC11NNormalizeAttr( a ) \
+ xmlC11NNormalizeString((a), XMLC14N_NORMALIZE_ATTR)
+#define xmlC11NNormalizeComment( a ) \
+ xmlC11NNormalizeString((a), XMLC14N_NORMALIZE_COMMENT)
+#define xmlC11NNormalizePI( a ) \
+ xmlC11NNormalizeString((a), XMLC14N_NORMALIZE_PI)
+#define xmlC11NNormalizeText( a ) \
+ xmlC11NNormalizeString((a), XMLC14N_NORMALIZE_TEXT)
+
+#define xmlC14NIsVisible( ctx, node, parent ) \
+ (((ctx)->is_visible_callback != NULL) ? \
+ (ctx)->is_visible_callback((ctx)->user_data, \
+ (xmlNodePtr)(node), (xmlNodePtr)(parent)) : 1)
+
+/************************************************************************
+ * *
+ * Some factorized error routines *
+ * *
+ ************************************************************************/
+
+/**
+ * xmlC14NErrMemory:
+ * @param extra extra informations
+ *
+ * Handle a redefinition of attribute error
+ */
+static void
+xmlC14NErrMemory(const char *extra)
+{
+ __xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_C14N,
+ XML_ERR_NO_MEMORY, XML_ERR_ERROR, NULL, 0, extra,
+ NULL, NULL, 0, 0,
+ "Memory allocation failed : %s\n", extra);
+}
+
+/**
+ * xmlC14NErr:
+ * @param ctxt a C14N evaluation context
+ * @param node the context node
+ * @param error the erorr code
+ * @param msg the message
+ * @param extra extra informations
+ *
+ * Handle a redefinition of attribute error
+ */
+static void
+xmlC14NErr(xmlC14NCtxPtr ctxt, xmlNodePtr node, int error,
+ const char * msg)
+{
+ if (ctxt != NULL)
+ ctxt->error = error;
+ __xmlRaiseError(NULL, NULL, NULL,
+ ctxt, node, XML_FROM_C14N, error,
+ XML_ERR_ERROR, NULL, 0,
+ NULL, NULL, NULL, 0, 0, msg);
+}
+
+/************************************************************************
+ * *
+ * The implementation internals *
+ * *
+ ************************************************************************/
+#define XML_NAMESPACES_DEFAULT 16
+
+static int
+xmlC14NIsNodeInNodeset(xmlNodeSetPtr nodes, xmlNodePtr node, xmlNodePtr parent) {
+ if((nodes != NULL) && (node != NULL)) {
+ if(node->type != XML_NAMESPACE_DECL) {
+ return(xmlXPathNodeSetContains(nodes, node));
+ } else {
+ xmlNs ns;
+
+ memcpy(&ns, node, sizeof(ns));
+
+
+ if((parent != NULL) && (parent->type == XML_ATTRIBUTE_NODE)) {
+ ns.next = (xmlNsPtr)parent->parent;
+ } else {
+ ns.next = (xmlNsPtr)parent;
+ }
+
+ /*
+ * If the input is an XPath node-set, then the node-set must explicitly
+ * contain every node to be rendered to the canonical form.
+ */
+ return(xmlXPathNodeSetContains(nodes, (xmlNodePtr)&ns));
+ }
+ }
+ return(1);
+}
+
+static xmlC14NVisibleNsStackPtr
+xmlC14NVisibleNsStackCreate(void) {
+ xmlC14NVisibleNsStackPtr ret;
+
+ ret = (xmlC14NVisibleNsStackPtr) xmlMalloc(sizeof(xmlC14NVisibleNsStack));
+ if (!ret) {
+ xmlC14NErrMemory("creating stack");
+ return(NULL);
+ }
+ memset(ret, 0 , (size_t) sizeof(xmlC14NVisibleNsStack));
+ return(ret);
+}
+
+static void
+xmlC14NVisibleNsStackDestroy(xmlC14NVisibleNsStackPtr cur) {
+ if(cur == NULL) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NVisibleNsStackDestroy: cur is null.\n");
+#endif
+ return;
+ }
+ if(cur->nsTab != NULL) {
+ memset(cur->nsTab, 0, cur->nsMax * sizeof(xmlNsPtr));
+ xmlFree(cur->nsTab);
+ }
+ if(cur->nodeTab != NULL) {
+ memset(cur->nodeTab, 0, cur->nsMax * sizeof(xmlNodePtr));
+ xmlFree(cur->nodeTab);
+ }
+ memset(cur, 0, sizeof(xmlC14NVisibleNsStack));
+ xmlFree(cur);
+
+}
+
+static void
+xmlC14NVisibleNsStackAdd(xmlC14NVisibleNsStackPtr cur, xmlNsPtr ns, xmlNodePtr node) {
+ if((cur == NULL) ||
+ ((cur->nsTab == NULL) && (cur->nodeTab != NULL)) ||
+ ((cur->nsTab != NULL) && (cur->nodeTab == NULL))) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NVisibleNsStackAdd: cur is null.\n");
+#endif
+ return;
+ }
+
+ if ((cur->nsTab == NULL) && (cur->nodeTab == NULL)) {
+ cur->nsTab = (xmlNsPtr*) xmlMalloc(XML_NAMESPACES_DEFAULT * sizeof(xmlNsPtr));
+ cur->nodeTab = (xmlNodePtr*) xmlMalloc(XML_NAMESPACES_DEFAULT * sizeof(xmlNodePtr));
+ if ((cur->nsTab == NULL) || (cur->nodeTab == NULL)) {
+ xmlC14NErrMemory("adding node to stack");
+ return;
+ }
+ memset(cur->nsTab, 0 , XML_NAMESPACES_DEFAULT * sizeof(xmlNsPtr));
+ memset(cur->nodeTab, 0 , XML_NAMESPACES_DEFAULT * sizeof(xmlNodePtr));
+ cur->nsMax = XML_NAMESPACES_DEFAULT;
+ } else if(cur->nsMax == cur->nsCurEnd) {
+ void *tmp;
+ int tmpSize;
+
+ tmpSize = 2 * cur->nsMax;
+ tmp = xmlRealloc(cur->nsTab, tmpSize * sizeof(xmlNsPtr));
+ if (tmp == NULL) {
+ xmlC14NErrMemory("adding node to stack");
+ return;
+ }
+ cur->nsTab = (xmlNsPtr*)tmp;
+
+ tmp = xmlRealloc(cur->nodeTab, tmpSize * sizeof(xmlNodePtr));
+ if (tmp == NULL) {
+ xmlC14NErrMemory("adding node to stack");
+ return;
+ }
+ cur->nodeTab = (xmlNodePtr*)tmp;
+
+ cur->nsMax = tmpSize;
+ }
+ cur->nsTab[cur->nsCurEnd] = ns;
+ cur->nodeTab[cur->nsCurEnd] = node;
+
+ ++cur->nsCurEnd;
+}
+
+static void
+xmlC14NVisibleNsStackSave(xmlC14NVisibleNsStackPtr cur, xmlC14NVisibleNsStackPtr state) {
+ if(!cur || !state) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NVisibleNsStackSave: cur or state is null.\n");
+#endif
+ return;
+ }
+
+ state->nsCurEnd = cur->nsCurEnd;
+ state->nsPrevStart = cur->nsPrevStart;
+ state->nsPrevEnd = cur->nsPrevEnd;
+}
+
+static void
+xmlC14NVisibleNsStackRestore(xmlC14NVisibleNsStackPtr cur, xmlC14NVisibleNsStackPtr state) {
+ if(!cur || !state) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NVisibleNsStackRestore: cur or state is null.\n");
+#endif
+ return;
+ }
+ cur->nsCurEnd = state->nsCurEnd;
+ cur->nsPrevStart = state->nsPrevStart;
+ cur->nsPrevEnd = state->nsPrevEnd;
+}
+
+static void
+xmlC14NVisibleNsStackShift(xmlC14NVisibleNsStackPtr cur) {
+ if(cur == NULL) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NVisibleNsStackRestore: cur is null.\n");
+#endif
+ return;
+ }
+ cur->nsPrevStart = cur->nsPrevEnd;
+ cur->nsPrevEnd = cur->nsCurEnd;
+}
+
+static int
+xmlC14NStrEqual(const xmlChar *str1, const xmlChar *str2) {
+ if (str1 == str2) return(1);
+ if (str1 == NULL) return((*str2) == '\0');
+ if (str2 == NULL) return((*str1) == '\0');
+ do {
+ if (*str1++ != *str2) return(0);
+ } while (*str2++);
+ return(1);
+}
+
+/**
+ * xmlC14NVisibleNsStackFind:
+ * @param ctx the C14N context
+ * @param ns the namespace to check
+ *
+ * Checks whether the given namespace was already rendered or not
+ *
+ * Returns 1 if we already wrote this namespace or 0 otherwise
+ */
+static int
+xmlC14NVisibleNsStackFind(xmlC14NVisibleNsStackPtr cur, xmlNsPtr ns)
+{
+ int i;
+ const xmlChar *prefix;
+ const xmlChar *href;
+ int has_empty_ns;
+
+ if(cur == NULL) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NVisibleNsStackFind: cur is null.\n");
+#endif
+ return (0);
+ }
+
+ /*
+ * if the default namespace xmlns="" is not defined yet then
+ * we do not want to print it out
+ */
+ prefix = ((ns == NULL) || (ns->prefix == NULL)) ? BAD_CAST "" : ns->prefix;
+ href = ((ns == NULL) || (ns->href == NULL)) ? BAD_CAST "" : ns->href;
+ has_empty_ns = (xmlC14NStrEqual(prefix, NULL) && xmlC14NStrEqual(href, NULL));
+
+ if (cur->nsTab != NULL) {
+ int start = (has_empty_ns) ? 0 : cur->nsPrevStart;
+ for (i = cur->nsCurEnd - 1; i >= start; --i) {
+ xmlNsPtr ns1 = cur->nsTab[i];
+
+ if(xmlC14NStrEqual(prefix, (ns1 != NULL) ? ns1->prefix : NULL)) {
+ return(xmlC14NStrEqual(href, (ns1 != NULL) ? ns1->href : NULL));
+ }
+ }
+ }
+ return(has_empty_ns);
+}
+
+static int
+xmlExcC14NVisibleNsStackFind(xmlC14NVisibleNsStackPtr cur, xmlNsPtr ns, xmlC14NCtxPtr ctx) {
+ int i;
+ const xmlChar *prefix;
+ const xmlChar *href;
+ int has_empty_ns;
+
+ if(cur == NULL) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlExcC14NVisibleNsStackFind: cur is null.\n");
+#endif
+ return (0);
+ }
+
+ /*
+ * if the default namespace xmlns="" is not defined yet then
+ * we do not want to print it out
+ */
+ prefix = ((ns == NULL) || (ns->prefix == NULL)) ? BAD_CAST "" : ns->prefix;
+ href = ((ns == NULL) || (ns->href == NULL)) ? BAD_CAST "" : ns->href;
+ has_empty_ns = (xmlC14NStrEqual(prefix, NULL) && xmlC14NStrEqual(href, NULL));
+
+ if (cur->nsTab != NULL) {
+ int start = 0;
+ for (i = cur->nsCurEnd - 1; i >= start; --i) {
+ xmlNsPtr ns1 = cur->nsTab[i];
+
+ if(xmlC14NStrEqual(prefix, (ns1 != NULL) ? ns1->prefix : NULL)) {
+ if(xmlC14NStrEqual(href, (ns1 != NULL) ? ns1->href : NULL)) {
+ return(xmlC14NIsVisible(ctx, ns1, cur->nodeTab[i]));
+ } else {
+ return(0);
+ }
+ }
+ }
+ }
+ return(has_empty_ns);
+}
+
+
+
+
+/**
+ * xmlC14NIsXmlNs:
+ * @param ns the namespace to check
+ *
+ * Checks whether the given namespace is a default "xml:" namespace
+ * with href="http://www.w3.org/XML/1998/namespace"
+ *
+ * Returns 1 if the node is default or 0 otherwise
+ */
+
+
+static int
+xmlC14NIsXmlNs(xmlNsPtr ns)
+{
+ return ((ns != NULL) &&
+ (xmlStrEqual(ns->prefix, BAD_CAST "xml")) &&
+ (xmlStrEqual(ns->href,
+ BAD_CAST
+ "http://www.w3.org/XML/1998/namespace")));
+}
+
+
+/**
+ * xmlC14NNsCompare:
+ * @param ns1 the pointer to first namespace
+ * @param ns2 the pointer to second namespace
+ *
+ * Compares the namespaces by names (prefixes).
+ *
+ * Returns -1 if ns1 < ns2, 0 if ns1 == ns2 or 1 if ns1 > ns2.
+ */
+static int
+xmlC14NNsCompare(xmlNsPtr ns1, xmlNsPtr ns2)
+{
+ if (ns1 == ns2)
+ return (0);
+ if (ns1 == NULL)
+ return (-1);
+ if (ns2 == NULL)
+ return (1);
+
+ return (xmlStrcmp(ns1->prefix, ns2->prefix));
+}
+
+
+/**
+ * xmlC14NPrintNamespaces:
+ * @param ns the pointer to namespace
+ * @param ctx the C14N context
+ *
+ * Prints the given namespace to the output buffer from C14N context.
+ *
+ * Returns 1 on success or 0 on fail.
+ */
+static int
+xmlC14NPrintNamespaces(const xmlNsPtr ns, xmlC14NCtxPtr ctx)
+{
+
+ if ((ns == NULL) || (ctx == NULL)) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NPrintNamespace: namespace or context pointer is null\n");
+#endif
+ return 0;
+ }
+
+ if (ns->prefix != NULL) {
+ xmlOutputBufferWriteString(ctx->buf, " xmlns:");
+ xmlOutputBufferWriteString(ctx->buf, (const char *) ns->prefix);
+ xmlOutputBufferWriteString(ctx->buf, "=\"");
+ } else {
+ xmlOutputBufferWriteString(ctx->buf, " xmlns=\"");
+ }
+ if(ns->href != NULL) {
+ xmlOutputBufferWriteString(ctx->buf, (const char *) ns->href);
+ }
+ xmlOutputBufferWriteString(ctx->buf, "\"");
+ return (1);
+}
+
+/**
+ * xmlC14NProcessNamespacesAxis:
+ * @param ctx the C14N context
+ * @param node the current node
+ *
+ * Prints out canonical namespace axis of the current node to the
+ * buffer from C14N context as follows
+ *
+ * Canonical XML v 1.0 (http://www.w3.org/TR/xml-c14n)
+ *
+ * Namespace Axis
+ * Consider a list L containing only namespace nodes in the
+ * axis and in the node-set in lexicographic order (ascending). To begin
+ * processing L, if the first node is not the default namespace node (a node
+ * with no namespace URI and no local name), then generate a space followed
+ * by xmlns="" if and only if the following conditions are met:
+ * - the element E that owns the axis is in the node-set
+ * - The nearest ancestor element of E in the node-set has a default
+ * namespace node in the node-set (default namespace nodes always
+ * have non-empty values in XPath)
+ * The latter condition eliminates unnecessary occurrences of xmlns="" in
+ * the canonical form since an element only receives an xmlns="" if its
+ * default namespace is empty and if it has an immediate parent in the
+ * canonical form that has a non-empty default namespace. To finish
+ * processing L, simply process every namespace node in L, except omit
+ * namespace node with local name xml, which defines the xml prefix,
+ * if its string value is http://www.w3.org/XML/1998/namespace.
+ *
+ * Exclusive XML Canonicalization v 1.0 (http://www.w3.org/TR/xml-exc-c14n)
+ * Canonical XML applied to a document subset requires the search of the
+ * ancestor nodes of each orphan element node for attributes in the xml
+ * namespace, such as xml:lang and xml:space. These are copied into the
+ * element node except if a declaration of the same attribute is already
+ * in the attribute axis of the element (whether or not it is included in
+ * the document subset). This search and copying are omitted from the
+ * Exclusive XML Canonicalization method.
+ *
+ * Returns 0 on success or -1 on fail.
+ */
+static int
+xmlC14NProcessNamespacesAxis(xmlC14NCtxPtr ctx, xmlNodePtr cur, int visible)
+{
+ xmlNodePtr n;
+ xmlNsPtr ns, tmp;
+ xmlListPtr list;
+ int already_rendered;
+ int has_empty_ns = 0;
+
+ if ((ctx == NULL) || (cur == NULL) || (cur->type != XML_ELEMENT_NODE)) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NProcessNamespacesAxis: Null context or node pointer or type != XML_ELEMENT_NODE.\n");
+#endif
+ return (-1);
+ }
+
+ /*
+ * Create a sorted list to store element namespaces
+ */
+ list = xmlListCreate(NULL, (xmlListDataCompare) xmlC14NNsCompare);
+ if (list == NULL) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NProcessNamespacesAxis: list creation failed\n");
+#endif
+ return (-1);
+ }
+
+ /* check all namespaces */
+ for(n = cur; n != NULL; n = n->parent) {
+ for(ns = n->nsDef; ns != NULL; ns = ns->next) {
+ tmp = xmlSearchNs(cur->doc, cur, ns->prefix);
+
+ if((tmp == ns) && !xmlC14NIsXmlNs(ns) && xmlC14NIsVisible(ctx, ns, cur)) {
+ already_rendered = xmlC14NVisibleNsStackFind(ctx->ns_rendered, ns);
+ if(visible) {
+ xmlC14NVisibleNsStackAdd(ctx->ns_rendered, ns, cur);
+ }
+ if(!already_rendered) {
+ xmlListInsert(list, ns);
+ }
+ if(xmlStrlen(ns->prefix) == 0) {
+ has_empty_ns = 1;
+ }
+ }
+ }
+ }
+
+ /**
+ * if the first node is not the default namespace node (a node with no
+ * namespace URI and no local name), then generate a space followed by
+ * xmlns="" if and only if the following conditions are met:
+ * - the element E that owns the axis is in the node-set
+ * - the nearest ancestor element of E in the node-set has a default
+ * namespace node in the node-set (default namespace nodes always
+ * have non-empty values in XPath)
+ */
+ if(visible && !has_empty_ns) {
+ //FIXIT
+ //static
+ xmlNs ns_default;
+
+ memset(&ns_default, 0, sizeof(ns_default));
+ if(!xmlC14NVisibleNsStackFind(ctx->ns_rendered, &ns_default)) {
+ xmlC14NPrintNamespaces(&ns_default, ctx);
+ }
+ }
+
+
+ /*
+ * print out all elements from list
+ */
+ xmlListWalk(list, (xmlListWalker)xmlC14NPrintNamespaces, (const void*)ctx);
+
+ /*
+ * Cleanup
+ */
+ xmlListDelete(list);
+ return (0);
+}
+
+
+/**
+ * xmlExcC14NProcessNamespacesAxis:
+ * @param ctx the C14N context
+ * @param node the current node
+ *
+ * Prints out exclusive canonical namespace axis of the current node to the
+ * buffer from C14N context as follows
+ *
+ * Exclusive XML Canonicalization
+ * http://www.w3.org/TR/xml-exc-c14n
+ *
+ * If the element node is in the XPath subset then output the node in
+ * accordance with Canonical XML except for namespace nodes which are
+ * rendered as follows:
+ *
+ * 1. Render each namespace node iff:
+ * * it is visibly utilized by the immediate parent element or one of
+ * its attributes, or is present in InclusiveNamespaces PrefixList, and
+ * * its prefix and value do not appear in ns_rendered. ns_rendered is
+ * obtained by popping the state stack in order to obtain a list of
+ * prefixes and their values which have already been rendered by
+ * an output ancestor of the namespace node's parent element.
+ * 2. Append the rendered namespace node to the list ns_rendered of namespace
+ * nodes rendered by output ancestors. Push ns_rendered on state stack and
+ * recurse.
+ * 3. After the recursion returns, pop thestate stack.
+ *
+ *
+ * Returns 0 on success or -1 on fail.
+ */
+static int
+xmlExcC14NProcessNamespacesAxis(xmlC14NCtxPtr ctx, xmlNodePtr cur, int visible)
+{
+ xmlNsPtr ns;
+ xmlListPtr list;
+ xmlAttrPtr attr;
+ int already_rendered;
+ int has_empty_ns = 0;
+ int has_visibly_utilized_empty_ns = 0;
+ int has_empty_ns_in_inclusive_list = 0;
+
+ if ((ctx == NULL) || (cur == NULL) || (cur->type != XML_ELEMENT_NODE)) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlExcC14NProcessNamespacesAxis: Null context or node pointer or type != XML_ELEMENT_NODE.\n");
+#endif
+ return (-1);
+ }
+
+ if(!ctx->exclusive) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlExcC14NProcessNamespacesAxis: called for non-exclusive canonization or rendered stack is NULL.\n");
+#endif
+ return (-1);
+
+ }
+
+ /*
+ * Create a sorted list to store element namespaces
+ */
+ list = xmlListCreate(NULL, (xmlListDataCompare) xmlC14NNsCompare);
+ if (list == NULL) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlExcC14NProcessNamespacesAxis: list creation failed\n");
+#endif
+ return (-1);
+ }
+
+ /*
+ * process inclusive namespaces:
+ * All namespace nodes appearing on inclusive ns list are
+ * handled as provided in Canonical XML
+ */
+ if(ctx->inclusive_ns_prefixes != NULL) {
+ xmlChar *prefix;
+ int i;
+
+ for (i = 0; ctx->inclusive_ns_prefixes[i] != NULL; ++i) {
+ prefix = ctx->inclusive_ns_prefixes[i];
+ /*
+ * Special values for namespace with empty prefix
+ */
+ if (xmlStrEqual(prefix, BAD_CAST "#default")
+ || xmlStrEqual(prefix, BAD_CAST "")) {
+ prefix = NULL;
+ has_empty_ns_in_inclusive_list = 1;
+ }
+
+ ns = xmlSearchNs(cur->doc, cur, prefix);
+ if((ns != NULL) && !xmlC14NIsXmlNs(ns) && xmlC14NIsVisible(ctx, ns, cur)) {
+ already_rendered = xmlC14NVisibleNsStackFind(ctx->ns_rendered, ns);
+ if(visible) {
+ xmlC14NVisibleNsStackAdd(ctx->ns_rendered, ns, cur);
+ }
+ if(!already_rendered) {
+ xmlListInsert(list, ns);
+ }
+ if(xmlStrlen(ns->prefix) == 0) {
+ has_empty_ns = 1;
+ }
+ }
+ }
+ }
+
+ /* add node namespace */
+ if(cur->ns != NULL) {
+ ns = cur->ns;
+ } else {
+ ns = xmlSearchNs(cur->doc, cur, NULL);
+ has_visibly_utilized_empty_ns = 1;
+ }
+ if((ns != NULL) && !xmlC14NIsXmlNs(ns)) {
+ if(visible && xmlC14NIsVisible(ctx, ns, cur)) {
+ if(!xmlExcC14NVisibleNsStackFind(ctx->ns_rendered, ns, ctx)) {
+ xmlListInsert(list, ns);
+ }
+ }
+ if(visible) {
+ xmlC14NVisibleNsStackAdd(ctx->ns_rendered, ns, cur);
+ }
+ if(xmlStrlen(ns->prefix) == 0) {
+ has_empty_ns = 1;
+ }
+ }
+
+
+ /* add attributes */
+ for(attr = cur->properties; attr != NULL; attr = attr->next) {
+ /*
+ * we need to check that attribute is visible and has non
+ * default namespace (XML Namespaces: "default namespaces
+ * do not apply directly to attributes")
+ */
+ if((attr->ns != NULL) && !xmlC14NIsXmlNs(attr->ns) && xmlC14NIsVisible(ctx, attr, cur)) {
+ already_rendered = xmlExcC14NVisibleNsStackFind(ctx->ns_rendered, attr->ns, ctx);
+ xmlC14NVisibleNsStackAdd(ctx->ns_rendered, attr->ns, cur);
+ if(!already_rendered && visible) {
+ xmlListInsert(list, attr->ns);
+ }
+ if(xmlStrlen(attr->ns->prefix) == 0) {
+ has_empty_ns = 1;
+ }
+ } else if((attr->ns != NULL) && (xmlStrlen(attr->ns->prefix) == 0) && (xmlStrlen(attr->ns->href) == 0)) {
+ has_visibly_utilized_empty_ns = 1;
+ }
+ }
+
+ /*
+ * Process xmlns=""
+ */
+ if(visible && has_visibly_utilized_empty_ns &&
+ !has_empty_ns && !has_empty_ns_in_inclusive_list) {
+ //static //FIXIT
+ xmlNs ns_default;
+
+ memset(&ns_default, 0, sizeof(ns_default));
+
+ already_rendered = xmlExcC14NVisibleNsStackFind(ctx->ns_rendered, &ns_default, ctx);
+ if(!already_rendered) {
+ xmlC14NPrintNamespaces(&ns_default, ctx);
+ }
+ } else if(visible && !has_empty_ns && has_empty_ns_in_inclusive_list) {
+ //static FIXIT
+ xmlNs ns_default;
+
+ memset(&ns_default, 0, sizeof(ns_default));
+ if(!xmlC14NVisibleNsStackFind(ctx->ns_rendered, &ns_default)) {
+ xmlC14NPrintNamespaces(&ns_default, ctx);
+ }
+ }
+
+
+
+ /*
+ * print out all elements from list
+ */
+ xmlListWalk(list, (xmlListWalker) xmlC14NPrintNamespaces, (const void *) ctx);
+
+ /*
+ * Cleanup
+ */
+ xmlListDelete(list);
+ return (0);
+}
+
+
+/**
+ * xmlC14NAttrsCompare:
+ * @param attr1 the pointer tls o first attr
+ * @param attr2 the pointer to second attr
+ *
+ * Prints the given attribute to the output buffer from C14N context.
+ *
+ * Returns -1 if attr1 < attr2, 0 if attr1 == attr2 or 1 if attr1 > attr2.
+ */
+static int
+xmlC14NAttrsCompare(xmlAttrPtr attr1, xmlAttrPtr attr2)
+{
+ int ret = 0;
+
+ /*
+ * Simple cases
+ */
+ if (attr1 == attr2)
+ return (0);
+ if (attr1 == NULL)
+ return (-1);
+ if (attr2 == NULL)
+ return (1);
+ if (attr1->ns == attr2->ns) {
+ return (xmlStrcmp(attr1->name, attr2->name));
+ }
+
+ /*
+ * Attributes in the default namespace are first
+ * because the default namespace is not applied to
+ * unqualified attributes
+ */
+ if (attr1->ns == NULL)
+ return (-1);
+ if (attr2->ns == NULL)
+ return (1);
+ if (attr1->ns->prefix == NULL)
+ return (-1);
+ if (attr2->ns->prefix == NULL)
+ return (1);
+
+ ret = xmlStrcmp(attr1->ns->href, attr2->ns->href);
+ if (ret == 0) {
+ ret = xmlStrcmp(attr1->name, attr2->name);
+ }
+ return (ret);
+}
+
+
+/**
+ * xmlC14NPrintAttrs:
+ * @param attr the pointer to attr
+ * @param ctx the C14N context
+ *
+ * Prints out canonical attribute urrent node to the
+ * buffer from C14N context as follows
+ *
+ * Canonical XML v 1.0 (http://www.w3.org/TR/xml-c14n)
+ *
+ * Returns 1 on success or 0 on fail.
+ */
+static int
+xmlC14NPrintAttrs(const xmlAttrPtr attr, xmlC14NCtxPtr ctx)
+{
+ xmlChar *value;
+ xmlChar *buffer;
+
+ if ((attr == NULL) || (ctx == NULL)) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NPrintAttrs: attr == NULL or ctx == NULL\n");
+#endif
+ return (0);
+ }
+
+ xmlOutputBufferWriteString(ctx->buf, " ");
+ if (attr->ns != NULL && xmlStrlen(attr->ns->prefix) > 0) {
+ xmlOutputBufferWriteString(ctx->buf,
+ (const char *) attr->ns->prefix);
+ xmlOutputBufferWriteString(ctx->buf, ":");
+ }
+ xmlOutputBufferWriteString(ctx->buf, (const char *) attr->name);
+ xmlOutputBufferWriteString(ctx->buf, "=\"");
+
+ value = xmlNodeListGetString(attr->doc, attr->children, 1);
+
+ if (value != NULL) {
+ buffer = xmlC11NNormalizeAttr(value);
+ xmlFree(value);
+ if (buffer != NULL) {
+ xmlOutputBufferWriteString(ctx->buf, (const char *) buffer);
+ xmlFree(buffer);
+ } else {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NPrintAttrs: xmlC11NNormalizeAttr failed\n");
+#endif
+ return (0);
+ }
+ }
+ xmlOutputBufferWriteString(ctx->buf, "\"");
+ return (1);
+}
+
+/**
+ * xmlC14NProcessAttrsAxis:
+ * @param ctx the C14N context
+ * @param cur the current node
+ *
+ * Prints out canonical attribute axis of the current node to the
+ * buffer from C14N context as follows
+ *
+ * Canonical XML v 1.0 (http://www.w3.org/TR/xml-c14n)
+ *
+ * Attribute Axis
+ * In lexicographic order (ascending), process each node that
+ * is in the element's attribute axis and in the node-set.
+ *
+ * The processing of an element node E MUST be modified slightly
+ * when an XPath node-set is given as input and the element's
+ * parent is omitted from the node-set.
+ *
+ *
+ * Exclusive XML Canonicalization v 1.0 (http://www.w3.org/TR/xml-exc-c14n)
+ *
+ * Canonical XML applied to a document subset requires the search of the
+ * ancestor nodes of each orphan element node for attributes in the xml
+ * namespace, such as xml:lang and xml:space. These are copied into the
+ * element node except if a declaration of the same attribute is already
+ * in the attribute axis of the element (whether or not it is included in
+ * the document subset). This search and copying are omitted from the
+ * Exclusive XML Canonicalization method.
+ *
+ * Returns 0 on success or -1 on fail.
+ */
+static int
+xmlC14NProcessAttrsAxis(xmlC14NCtxPtr ctx, xmlNodePtr cur)
+{
+ xmlAttrPtr attr;
+ xmlListPtr list;
+
+ if (!ctx || !cur || (cur->type != XML_ELEMENT_NODE)) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NProcessAttrsAxis: Null context or node pointer or type != XML_ELEMENT_NODE.\n");
+#endif
+ return (-1);
+ }
+
+ /*
+ * Create a sorted list to store element attributes
+ */
+ list = xmlListCreate(NULL, (xmlListDataCompare) xmlC14NAttrsCompare);
+ if (!list) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NProcessAttrsAxis: list creation failed\n");
+#endif
+ return (-1);
+ }
+
+ /*
+ * Add all visible attributes from current node.
+ */
+ attr = cur->properties;
+ while (attr) {
+ /* check that attribute is visible */
+ if (xmlC14NIsVisible(ctx, attr, cur)) {
+ xmlListInsert(list, attr);
+ }
+ attr = attr->next;
+ }
+
+ /*
+ * include attributes in "xml" namespace defined in ancestors
+ * (only for non-exclusive XML Canonicalization)
+ */
+ if (!ctx->exclusive &&
+ cur->parent &&
+ !xmlC14NIsVisible(ctx, cur->parent, cur->parent->parent))
+ {
+ /*
+ * If XPath node-set is not specified then the parent is always
+ * visible!
+ */
+ cur = cur->parent;
+// XML Engine: NEW CODE
+ // NOTE: We must check that 'cur' is not a document node,
+ // otherwise xmlDocPtr is wrongly treated as xmlNodePtr
+ // (node-specific fields are accessed)
+ // ORIGINAL: while (cur != NULL)
+ while(cur && cur->type != XML_DOCUMENT_NODE)
+//
+ {
+ attr = cur->properties; // NOTE: We may still have problem here if *cur is xmlEntity
+ while (attr)
+ {
+ if (attr->ns &&
+ xmlStrEqual(attr->ns->prefix, BAD_CAST "xml"))
+ {
+ if (xmlListSearch(list, attr) == NULL) {
+ xmlListInsert(list, attr);
+ }
+ }
+ attr = attr->next;
+ }
+ cur = cur->parent;
+ }
+ }
+
+ /*
+ * print out all elements from list
+ */
+ xmlListWalk(list, (xmlListWalker) xmlC14NPrintAttrs, (const void*) ctx);
+
+ /*
+ * Cleanup
+ */
+ xmlListDelete(list);
+ return (0);
+}
+
+/**
+ * xmlC14NCheckForRelativeNamespaces:
+ * @param ctx the C14N context
+ * @param cur the current element node
+ *
+ * Checks that current element node has no relative namespaces defined
+ *
+ * Returns 0 if the node has no relative namespaces or -1 otherwise.
+ *
+ * OOM: possible --> check OOM flag
+ */
+static int
+xmlC14NCheckForRelativeNamespaces(xmlC14NCtxPtr ctx, xmlNodePtr cur)
+{
+ xmlNsPtr ns;
+
+ if (!ctx || !cur || (cur->type != XML_ELEMENT_NODE)) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NCheckForRelativeNamespaces: Null context or node pointer or type != XML_ELEMENT_NODE.\n");
+#endif
+ return (-1);
+ }
+
+ ns = cur->nsDef;
+ while (ns) {
+ if (xmlStrlen(ns->href) > 0) {
+ xmlURIPtr uri;
+
+ uri = xmlParseURI((const char*) ns->href);
+ if (!uri) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NCheckForRelativeNamespaces: unable to parse uri=\"%s\".\n",
+ ns->href);
+#endif
+ return (-1);
+ }
+ if (xmlStrlen((const xmlChar *) uri->scheme) == 0) {
+ xmlFreeURI(uri);
+ return (-1);
+ }
+ if (!xmlStrEqual((const xmlChar*) uri->scheme, BAD_CAST "urn") &&
+ xmlStrlen((const xmlChar *) uri->server) == 0)
+ {
+ xmlFreeURI(uri);
+ return (-1);
+ }
+ xmlFreeURI(uri);
+ }
+ ns = ns->next;
+ }
+ return (0);
+}
+
+/**
+ * xmlC14NProcessElementNode:
+ * @param ctx the pointer to C14N context object
+ * @param cur the node to process
+ *
+ * Canonical XML v 1.0 (http://www.w3.org/TR/xml-c14n)
+ *
+ * Element Nodes
+ * If the element is not in the node-set, then the result is obtained
+ * by processing the namespace axis, then the attribute axis, then
+ * processing the child nodes of the element that are in the node-set
+ * (in document order). If the element is in the node-set, then the result
+ * is an open angle bracket (<), the element QName, the result of
+ * processing the namespace axis, the result of processing the attribute
+ * axis, a close angle bracket (>), the result of processing the child
+ * nodes of the element that are in the node-set (in document order), an
+ * open angle bracket, a forward slash (/), the element QName, and a close
+ * angle bracket.
+ *
+ * Returns non-negative value on success or negative value on fail
+ */
+static int
+xmlC14NProcessElementNode(xmlC14NCtxPtr ctx, xmlNodePtr cur, int visible)
+{
+ int ret;
+ xmlC14NVisibleNsStack state ;
+ int parent_is_doc = 0;
+ LOAD_GS_SAFE_NODE(cur)
+
+ if (!ctx || !cur || (cur->type != XML_ELEMENT_NODE)) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NProcessElementNode: Null context or node pointer or type != XML_ELEMENT_NODE.\n");
+#endif
+ return (-1);
+ }
+
+ /*
+ * Check relative relative namespaces:
+ * implementations of XML canonicalization MUST report an operation
+ * failure on documents containing relative namespace URIs.
+ */
+ if (xmlC14NCheckForRelativeNamespaces(ctx, cur) < 0) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NProcessElementNode: xmlC14NCheckForRelativeNamespaces failed.\n");
+#endif
+ return (-1);
+ }
+ if(OOM_FLAG)
+ return -1;
+
+ /*
+ * Save ns_rendered stack position
+ */
+ xmlC14NVisibleNsStackSave(ctx->ns_rendered, &state);
+
+ if (visible) {
+ if (ctx->parent_is_doc) {
+ /* save this flag into the stack */
+ parent_is_doc = ctx->parent_is_doc;
+ ctx->parent_is_doc = 0;
+ ctx->pos = XMLC14N_INSIDE_DOCUMENT_ELEMENT;
+ }
+ xmlOutputBufferWriteString(ctx->buf, "<");
+
+ if (cur->ns && xmlStrlen(cur->ns->prefix) > 0) {
+ xmlOutputBufferWriteString(ctx->buf,(const char*)cur->ns->prefix);
+ xmlOutputBufferWriteString(ctx->buf, ":");
+ }
+ xmlOutputBufferWriteString(ctx->buf,(const char*)cur->name);
+ }
+
+ if (!ctx->exclusive) {
+ ret = xmlC14NProcessNamespacesAxis(ctx, cur, visible);
+ } else {
+ ret = xmlExcC14NProcessNamespacesAxis(ctx, cur, visible);
+ }
+ if (ret < 0) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NProcessElementNode: xmlC14NProcessNamespacesAxis failed.\n");
+#endif
+ return (-1);
+ }
+
+ if(visible) {
+ xmlC14NVisibleNsStackShift(ctx->ns_rendered);
+ }
+
+ if(visible) {
+ ret = xmlC14NProcessAttrsAxis(ctx, cur);
+ if (ret < 0) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NProcessElementNode: xmlC14NProcessAttrsAxis failed.\n");
+#endif
+ return (-1);
+ }
+ }
+
+ if (visible) {
+ xmlOutputBufferWriteString(ctx->buf, ">");
+ }
+ if (cur->children != NULL) {
+ ret = xmlC14NProcessNodeList(ctx, cur->children);
+ if (ret < 0) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NProcessElementNode: xmlC14NProcessNodeList failed.\n");
+#endif
+ return (-1);
+ }
+ }
+ if (visible) {
+ xmlOutputBufferWriteString(ctx->buf, "</");
+ if (cur->ns && (xmlStrlen(cur->ns->prefix) > 0)) {
+ xmlOutputBufferWriteString(ctx->buf,(const char*)cur->ns->prefix);
+ xmlOutputBufferWriteString(ctx->buf,":");
+ }
+ xmlOutputBufferWriteString(ctx->buf,(const char*)cur->name);
+ xmlOutputBufferWriteString(ctx->buf,">");
+ if (parent_is_doc) {
+ /* restore this flag from the stack for next node */
+ ctx->parent_is_doc = parent_is_doc;
+ ctx->pos = XMLC14N_AFTER_DOCUMENT_ELEMENT;
+ }
+ }
+
+ /*
+ * Restore ns_rendered stack position
+ */
+ xmlC14NVisibleNsStackRestore(ctx->ns_rendered, &state);
+
+
+ return (0);
+}
+
+/**
+ * xmlC14NProcessNode:
+ * @param ctx the pointer to C14N context object
+ * @param cur the node to process
+ *
+ * Processes the given node
+ *
+ * Returns non-negative value on success or negative value on fail
+ *
+ * OOM: possible
+ */
+static int
+xmlC14NProcessNode(xmlC14NCtxPtr ctx, xmlNodePtr cur)
+{
+ int ret = 0;
+ int visible;
+
+ if ((ctx == NULL) || (cur == NULL)) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NProcessNode: Null context or node pointer.\n");
+#endif
+ return (-1);
+ }
+
+ visible = xmlC14NIsVisible(ctx, cur, cur->parent);
+ switch (cur->type) {
+ case XML_ELEMENT_NODE:
+ ret = xmlC14NProcessElementNode(ctx, cur, visible);
+ break;
+ case XML_CDATA_SECTION_NODE:
+ case XML_TEXT_NODE:
+ /*
+ * Text Nodes
+ * the string value, except all ampersands are replaced
+ * by &, all open angle brackets (<) are replaced by <, all closing
+ * angle brackets (>) are replaced by >, and all #xD characters are
+ * replaced by 
.
+ */
+ /* cdata sections are processed as text nodes */
+
+ if ((visible) && (cur->content != NULL)) {
+ xmlChar *buffer;
+
+ buffer = xmlC11NNormalizeText(cur->content);
+ if (buffer != NULL) {
+ xmlOutputBufferWriteString(ctx->buf,
+ (const char *) buffer);
+ xmlFree(buffer);
+ } else {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NProcessNode: xmlC11NNormalizeText() failed\n");
+#endif
+ return (-1);
+ }
+ }
+ break;
+ case XML_PI_NODE:
+ /*
+ * Processing Instruction (PI) Nodes-
+ * The opening PI symbol (<?), the PI target name of the node,
+ * a leading space and the string value if it is not empty, and
+ * the closing PI symbol (?>). If the string value is empty,
+ * then the leading space is not added. Also, a trailing #xA is
+ * rendered after the closing PI symbol for PI children of the
+ * root node with a lesser document order than the document
+ * element, and a leading #xA is rendered before the opening PI
+ * symbol of PI children of the root node with a greater document
+ * order than the document element.
+ */
+ if (visible) {
+ if (ctx->pos == XMLC14N_AFTER_DOCUMENT_ELEMENT) {
+ xmlOutputBufferWriteString(ctx->buf, "\x0A<?");
+ } else {
+ xmlOutputBufferWriteString(ctx->buf, "<?");
+ }
+
+ xmlOutputBufferWriteString(ctx->buf, (const char*) cur->name);
+ if (cur->content && *cur->content) {
+ xmlChar *buffer;
+
+ xmlOutputBufferWriteString(ctx->buf, " ");
+
+
+ buffer = xmlC11NNormalizePI(cur->content);
+ if (buffer) {
+ xmlOutputBufferWriteString(ctx->buf, (const char*)buffer);
+ xmlFree(buffer);
+ } else {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NProcessNode: xmlC11NNormalizePI() failed\n");
+#endif
+ return (-1);
+ }
+ }
+
+ if (ctx->pos == XMLC14N_BEFORE_DOCUMENT_ELEMENT) {
+ xmlOutputBufferWriteString(ctx->buf, "?>\x0A");
+ } else {
+ xmlOutputBufferWriteString(ctx->buf, "?>");
+ }
+ }
+ break;
+
+ case XML_COMMENT_NODE:
+ /*
+ * Comment Nodes
+ * Nothing if generating canonical XML without comments. For
+ * canonical XML with comments, generate the opening comment
+ * symbol (<!--), the string value of the node, and the
+ * closing comment symbol (-->). Also, a trailing #xA is rendered
+ * after the closing comment symbol for comment children of the
+ * root node with a lesser document order than the document
+ * element, and a leading #xA is rendered before the opening
+ * comment symbol of comment children of the root node with a
+ * greater document order than the document element. (Comment
+ * children of the root node represent comments outside of the
+ * top-level document element and outside of the document type
+ * declaration).
+ */
+ if (visible && ctx->with_comments) {
+ if (ctx->pos == XMLC14N_AFTER_DOCUMENT_ELEMENT) {
+ xmlOutputBufferWriteString(ctx->buf, "\x0A<!--");
+ } else {
+ xmlOutputBufferWriteString(ctx->buf, "<!--");
+ }
+
+ if (cur->content) {
+ xmlChar *buffer;
+
+
+ buffer = xmlC11NNormalizeComment(cur->content);
+ if (buffer != NULL) {
+ xmlOutputBufferWriteString(ctx->buf,
+ (const char *) buffer);
+ xmlFree(buffer);
+ } else {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NProcessNode: xmlC11NNormalizeComment() failed\n");
+#endif
+ return (-1);
+ }
+ }
+
+ if (ctx->pos == XMLC14N_BEFORE_DOCUMENT_ELEMENT) {
+ xmlOutputBufferWriteString(ctx->buf, "-->\x0A");
+ } else {
+ xmlOutputBufferWriteString(ctx->buf, "-->");
+ }
+ }
+ break;
+
+ case XML_DOCUMENT_NODE:
+ case XML_DOCUMENT_FRAG_NODE: /* should be processed as document? */
+#ifdef LIBXML_DOCB_ENABLED
+ case XML_DOCB_DOCUMENT_NODE: /* should be processed as document? */
+#endif
+#ifdef LIBXML_HTML_ENABLED
+ case XML_HTML_DOCUMENT_NODE: /* should be processed as document? */
+#endif
+ if (cur->children) {
+ ctx->pos = XMLC14N_BEFORE_DOCUMENT_ELEMENT;
+ ctx->parent_is_doc = 1;
+ ret = xmlC14NProcessNodeList(ctx, cur->children);
+ }
+ break;
+
+ case XML_ATTRIBUTE_NODE:
+ xmlC14NErr(ctx, cur, XML_C14N_INVALID_NODE,
+ "xmlC14NProcessNode: XML_ATTRIBUTE_NODE is illegal here\n");
+ return (-1);
+ case XML_NAMESPACE_DECL:
+ xmlC14NErr(ctx, cur, XML_C14N_INVALID_NODE,
+ "xmlC14NProcessNode: XML_NAMESPACE_DECL is illegal here\n");
+ return (-1);
+ case XML_ENTITY_REF_NODE:
+ xmlC14NErr(ctx, cur, XML_C14N_INVALID_NODE,
+ "xmlC14NProcessNode: XML_ENTITY_REF_NODE is illegal here\n");
+ return (-1);
+ case XML_ENTITY_NODE:
+ xmlC14NErr(ctx, cur, XML_C14N_INVALID_NODE,
+ "xmlC14NProcessNode: XML_ENTITY_NODE is illegal here\n");
+ return (-1);
+
+ case XML_DOCUMENT_TYPE_NODE:
+ case XML_NOTATION_NODE:
+ case XML_DTD_NODE:
+ case XML_ELEMENT_DECL:
+ case XML_ATTRIBUTE_DECL:
+ case XML_ENTITY_DECL:
+#ifdef LIBXML_XINCLUDE_ENABLED
+ case XML_XINCLUDE_START:
+ case XML_XINCLUDE_END:
+#endif
+ /*
+ * should be ignored according to "W3C Canonical XML"
+ */
+ break;
+ default:
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NProcessNode: unknown node type = %d\n",
+ cur->type);
+#endif
+ return (-1);
+ }
+
+ return (ret);
+}
+
+/**
+ * xmlC14NProcessNodeList:
+ * @param ctx the pointer to C14N context object
+ * @param cur the node to start from
+ *
+ * Processes all nodes in the row starting from cur.
+ *
+ * Returns non-negative value on success or negative value on fail
+ *
+ * OOM: possible
+ */
+static int
+xmlC14NProcessNodeList(xmlC14NCtxPtr ctx, xmlNodePtr cur)
+{
+ int ret;
+
+ if (!ctx) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NProcessNodeList: Null context pointer.\n");
+#endif
+ return (-1);
+ }
+
+ for (ret = 0; cur && ret >= 0; cur = cur->next) {
+ ret = xmlC14NProcessNode(ctx, cur);
+ }
+ return (ret);
+}
+
+
+/**
+ * xmlC14NFreeCtx:
+ * @param ctx the pointer to C14N context object
+ *
+ * Cleanups the C14N context object.
+ */
+
+static void
+xmlC14NFreeCtx(xmlC14NCtxPtr ctx)
+{
+ if (ctx == NULL) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NFreeCtx: ctx == NULL\n");
+#endif
+ return;
+ }
+
+ if (ctx->ns_rendered != NULL) {
+ xmlC14NVisibleNsStackDestroy(ctx->ns_rendered);
+ }
+ xmlFree(ctx);
+}
+
+/**
+ * xmlC14NNewCtx:
+ * @param doc the XML document for canonization
+ * @param is_visible_callback the function to use to determine is node visible
+ * or not
+ * @param user_data the first parameter for is_visible_callback function
+ * (in most cases, it is nodes set)
+ * inclusive_ns_prefixe the list of inclusive namespace prefixes
+ * ended with a NULL or NULL if there is no
+ * inclusive namespaces (only for exclusive
+ * canonicalization)
+ * @param with_comments include comments in the result (!=0) or not (==0)
+ * @param buf the output buffer to store canonical XML; this
+ * buffer MUST have encoder==NULL because C14N requires
+ * UTF-8 output
+ *
+ * Creates new C14N context object to store C14N parameters.
+ *
+ * Returns pointer to newly created object (success) or NULL (fail)
+ *
+ * OOM: possible --> NULL is returned for valid arguments
+ */
+static xmlC14NCtxPtr
+xmlC14NNewCtx(xmlDocPtr doc,
+ xmlC14NIsVisibleCallback is_visible_callback, void* user_data,
+ int exclusive, xmlChar ** inclusive_ns_prefixes,
+ int with_comments, xmlOutputBufferPtr buf)
+{
+ xmlC14NCtxPtr ctx;
+
+ if (!doc || !buf) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NNewCtx: pointer to document or output buffer is NULL\n");
+#endif
+ return (NULL);
+ }
+
+ /*
+ * Validate the encoding output buffer encoding
+ */
+ if (buf->encoder) {
+ xmlC14NErr(NULL, (xmlNodePtr) doc, XML_C14N_REQUIRES_UTF8,
+"xmlC14NNewCtx: output buffer encoder != NULL but C14N requires UTF8 output\n");
+ return (NULL);
+ }
+
+ /*
+ * Validate the XML document encoding value, if provided.
+ */
+ if (doc->charset != XML_CHAR_ENCODING_UTF8) {
+ xmlC14NErr(NULL, (xmlNodePtr) doc, XML_C14N_REQUIRES_UTF8,
+ "xmlC14NNewCtx: source document not in UTF8\n");
+ return (NULL);
+ }
+
+ /*
+ * Allocate a new xmlC14NCtxPtr and fill the fields.
+ */
+ ctx = (xmlC14NCtxPtr) xmlMalloc(sizeof(xmlC14NCtx));
+ if (!ctx) {
+ xmlC14NErrMemory("creating context");
+ return (NULL);
+ }
+ memset(ctx, 0, sizeof(xmlC14NCtx));
+
+ /*
+ * initialize C14N context
+ */
+ ctx->doc = doc;
+ ctx->with_comments = with_comments;
+ ctx->is_visible_callback = is_visible_callback;
+ ctx->user_data = user_data;
+ ctx->buf = buf;
+ ctx->parent_is_doc = 1;
+ ctx->pos = XMLC14N_BEFORE_DOCUMENT_ELEMENT;
+ ctx->ns_rendered = xmlC14NVisibleNsStackCreate();
+
+ if(!ctx->ns_rendered) {
+ xmlC14NErr(ctx, (xmlNodePtr) doc, XML_C14N_CREATE_STACK,
+ "xmlC14NNewCtx: xmlC14NVisibleNsStackCreate failed\n");
+ xmlC14NFreeCtx(ctx);
+ return (NULL);
+ }
+
+ /*
+ * Set "exclusive" flag, create a nodes set for namespaces
+ * stack and remember list of incluseve prefixes
+ */
+ if (exclusive) {
+ ctx->exclusive = 1;
+ ctx->inclusive_ns_prefixes = inclusive_ns_prefixes;
+ }
+ return (ctx);
+}
+
+/**
+ * xmlC14NExecute:
+ * @param doc the XML document for canonization
+ * @param is_visible_callback the function to use to determine is node visible
+ * or not
+ * @param user_data the first parameter for is_visible_callback function
+ * (in most cases, it is nodes set)
+ * @param exclusive the exclusive flag (0 - non-exclusive canonicalization;
+ * otherwise - exclusive canonicalization)
+ * @param inclusive_ns_prefixes the list of inclusive namespace prefixes
+ * ended with a NULL or NULL if there is no
+ * inclusive namespaces (only for exclusive
+ * canonicalization, ignored otherwise)
+ * @param with_comments include comments in the result (!=0) or not (==0)
+ * @param buf the output buffer to store canonical XML; this
+ * buffer MUST have encoder==NULL because C14N requires
+ * UTF-8 output
+ *
+ * Dumps the canonized image of given XML document into the provided buffer.
+ * For details see "Canonical XML" (http://www.w3.org/TR/xml-c14n) or
+ * "Exclusive XML Canonicalization" (http://www.w3.org/TR/xml-exc-c14n)
+ *
+ * Returns non-negative value on success or a negative value on fail
+ */
+XMLPUBFUNEXPORT int
+xmlC14NExecute(xmlDocPtr doc, xmlC14NIsVisibleCallback is_visible_callback,
+ void* user_data, int exclusive, xmlChar **inclusive_ns_prefixes,
+ int with_comments, xmlOutputBufferPtr buf) {
+
+ xmlC14NCtxPtr ctx;
+ int ret;
+
+ if (!buf || !doc) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NExecute: null return buffer or doc pointer\n");
+#endif
+ return (-1);
+ }
+
+ /*
+ * Validate the encoding output buffer encoding
+ */
+ if (buf->encoder) {
+ xmlC14NErr(NULL, (xmlNodePtr) doc, XML_C14N_REQUIRES_UTF8,
+"xmlC14NExecute: output buffer encoder != NULL but C14N requires UTF8 output\n");
+ return (-1);
+ }
+
+ ctx = xmlC14NNewCtx(doc, is_visible_callback, user_data,
+ exclusive, inclusive_ns_prefixes, with_comments, buf);
+ if (!ctx) {
+ xmlC14NErr(NULL, (xmlNodePtr) doc, XML_C14N_CREATE_CTXT,
+ "xmlC14NExecute: unable to create C14N context\n");
+ return (-1);
+ }
+
+ /*
+ * Root Node
+ * The root node is the parent of the top-level document element. The
+ * result of processing each of its child nodes that is in the node-set
+ * in document order. The root node does not generate a byte order mark,
+ * XML declaration, nor anything from within the document type
+ * declaration.
+ */
+ if (doc->children) {
+ ret = xmlC14NProcessNodeList(ctx, doc->children);
+ if (ret < 0) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NExecute: process childrens' list failed.\n");
+#endif
+ xmlC14NFreeCtx(ctx);
+ return (-1);
+ }
+ }
+
+ /*
+ * Flush buffer to get number of bytes written
+ */
+ ret = xmlOutputBufferFlush(buf);
+ if (ret < 0) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NExecute: buffer flush failed.\n");
+#endif
+ xmlC14NFreeCtx(ctx);
+ return (-1);
+ }
+
+ /*
+ * Cleanup
+ */
+ xmlC14NFreeCtx(ctx);
+ return (ret);
+}
+
+/**
+ * xmlC14NDocSaveTo:
+ * @param doc the XML document for canonization
+ * @param nodes the nodes set to be included in the canonized image
+ * or NULL if all document nodes should be included
+ * @param exclusive the exclusive flag (0 - non-exclusive canonicalization;
+ * otherwise - exclusive canonicalization)
+ * @param inclusive_ns_prefixes the list of inclusive namespace prefixes
+ * ended with a NULL or NULL if there is no
+ * inclusive namespaces (only for exclusive
+ * canonicalization, ignored otherwise)
+ * @param with_comments include comments in the result (!=0) or not (==0)
+ * @param buf the output buffer to store canonical XML; this
+ * buffer MUST have encoder==NULL because C14N requires
+ * UTF-8 output
+ *
+ * Dumps the canonized image of given XML document into the provided buffer.
+ * For details see "Canonical XML" (http://www.w3.org/TR/xml-c14n) or
+ * "Exclusive XML Canonicalization" (http://www.w3.org/TR/xml-exc-c14n)
+ *
+ * Returns non-negative value on success or a negative value on fail
+ */
+XMLPUBFUNEXPORT int
+xmlC14NDocSaveTo(xmlDocPtr doc, xmlNodeSetPtr nodes,
+ int exclusive, xmlChar ** inclusive_ns_prefixes,
+ int with_comments, xmlOutputBufferPtr buf) {
+ return(xmlC14NExecute(doc,
+ (xmlC14NIsVisibleCallback)xmlC14NIsNodeInNodeset,
+ nodes,
+ exclusive,
+ inclusive_ns_prefixes,
+ with_comments,
+ buf));
+}
+
+
+/**
+ * xmlC14NDocDumpMemory:
+ * @param doc the XML document for canonization
+ * @param nodes the nodes set to be included in the canonized image
+ * or NULL if all document nodes should be included
+ * @param exclusive the exclusive flag (0 - non-exclusive canonicalization;
+ * otherwise - exclusive canonicalization)
+ * @param inclusive_ns_prefixes the list of inclusive namespace prefixes
+ * ended with a NULL or NULL if there is no
+ * inclusive namespaces (only for exclusive
+ * canonicalization, ignored otherwise)
+ * @param with_comments include comments in the result (!=0) or not (==0)
+ * @param doc_txt_ptr the memory pointer for allocated canonical XML text;
+ * the caller of this functions is responsible for calling
+ * xmlFree() to free allocated memory
+ *
+ * Dumps the canonized image of given XML document into memory.
+ * For details see "Canonical XML" (http://www.w3.org/TR/xml-c14n) or
+ * "Exclusive XML Canonicalization" (http://www.w3.org/TR/xml-exc-c14n)
+ *
+ * Returns the number of bytes written on success or a negative value on fail
+ */
+XMLPUBFUNEXPORT int
+xmlC14NDocDumpMemory(xmlDocPtr doc, xmlNodeSetPtr nodes,
+ int exclusive, xmlChar ** inclusive_ns_prefixes,
+ int with_comments, xmlChar ** doc_txt_ptr)
+{
+ int ret;
+ xmlOutputBufferPtr buf;
+
+ if (doc_txt_ptr == NULL) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NDocDumpMemory: null return buffer pointer\n");
+#endif
+ return (-1);
+ }
+
+ *doc_txt_ptr = NULL;
+
+ /*
+ * create memory buffer with UTF8 (default) encoding
+ */
+ buf = xmlAllocOutputBuffer(NULL);
+ if (buf == NULL) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NDocDumpMemory: failed to allocate output buffer.\n");
+#endif
+ return (-1);
+ }
+
+ /*
+ * canonize document and write to buffer
+ */
+ ret = xmlC14NDocSaveTo(doc, nodes, exclusive, inclusive_ns_prefixes,
+ with_comments, buf);
+ if (ret < 0) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NDocDumpMemory: xmlC14NDocSaveTo failed.\n");
+#endif
+ (void) xmlOutputBufferClose(buf);
+ return (-1);
+ }
+
+ ret = buf->buffer->use;
+ if (ret > 0) {
+ *doc_txt_ptr = xmlStrndup(buf->buffer->content, ret);
+ }
+ (void) xmlOutputBufferClose(buf);
+
+ if ((*doc_txt_ptr == NULL) && (ret > 0)) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NDocDumpMemory: failed to allocate memory for document text representation\n");
+#endif
+ return (-1);
+ }
+ return (ret);
+}
+
+/**
+ * xmlC14NDocSave:
+ * @param doc the XML document for canonization
+ * @param nodes the nodes set to be included in the canonized image
+ * or NULL if all document nodes should be included
+ * @param exclusive the exclusive flag (0 - non-exclusive canonicalization;
+ * otherwise - exclusive canonicalization)
+ * @param inclusive_ns_prefixes the list of inclusive namespace prefixes
+ * ended with a NULL or NULL if there is no
+ * inclusive namespaces (only for exclusive
+ * canonicalization, ignored otherwise)
+ * @param with_comments include comments in the result (!=0) or not (==0)
+ * @param filename the filename to store canonical XML image
+ * @param compression the compression level (zlib requred):
+ * -1 - libxml default,
+ * 0 - uncompressed,
+ * >0 - compression level
+ *
+ * Dumps the canonized image of given XML document into the file.
+ * For details see "Canonical XML" (http://www.w3.org/TR/xml-c14n) or
+ * "Exclusive XML Canonicalization" (http://www.w3.org/TR/xml-exc-c14n)
+ *
+ * Returns the number of bytes written success or a negative value on fail
+ */
+XMLPUBFUNEXPORT int
+xmlC14NDocSave(xmlDocPtr doc, xmlNodeSetPtr nodes,
+ int exclusive, xmlChar ** inclusive_ns_prefixes,
+ int with_comments, const char *filename, int compression)
+{
+ xmlOutputBufferPtr buf;
+ int ret;
+
+ if (filename == NULL) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NDocSave: filename is NULL\n");
+#endif
+ return (-1);
+ }
+#ifdef HAVE_ZLIB_H
+ if (compression < 0)
+ compression = xmlGetCompressMode();
+#endif
+
+ /*
+ * save the content to a temp buffer, use default UTF8 encoding.
+ */
+ buf = xmlOutputBufferCreateFilename(filename, NULL, compression);
+ if (buf == NULL) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NDocSave: unable to create buffer for file=\"%s\" with compressin=%d\n",
+ filename, compression);
+#endif
+ return (-1);
+ }
+
+ /*
+ * canonize document and write to buffer
+ */
+ ret = xmlC14NDocSaveTo(doc, nodes, exclusive, inclusive_ns_prefixes,
+ with_comments, buf);
+ if (ret < 0) {
+#ifdef DEBUG_C14N
+ xmlGenericError(xmlGenericErrorContext,
+ "xmlC14NDocSave: xmlC14NDocSaveTo failed.\n");
+#endif
+ (void) xmlOutputBufferClose(buf);
+ return (-1);
+ }
+
+ /*
+ * get the numbers of bytes written
+ */
+ ret = xmlOutputBufferClose(buf);
+ return (ret);
+}
+
+
+
+/*
+ * Macro used to grow the current buffer.
+ */ // DONE: Fix xmlRealloc
+#define growBufferReentrant() { \
+ void* tmp; \
+ buffer_size *= 2; \
+ tmp = xmlRealloc(buffer, buffer_size * sizeof(xmlChar)); \
+ if (!tmp) { \
+ /* Note: must free the buffer */ \
+ xmlFree(buffer); \
+ xmlC14NErrMemory("growing buffer"); \
+ return(NULL); \
+ } \
+ buffer = (xmlChar*) tmp; \
+}
+
+/**
+ * xmlC11NNormalizeString:
+ * @param input the input string
+ * @param mode the normalization mode (attribute, comment, PI or text)
+ *
+ * Converts a string to a canonical (normalized) format. The code is stolen
+ * from xmlEncodeEntitiesReentrant(). Added normalization of \x09, \x0a, \x0A
+ * and the mode parameter
+ *
+ * Returns a normalized string (caller is responsible for calling xmlFree())
+ * or NULL if an error occurs
+ */
+static xmlChar *
+xmlC11NNormalizeString(const xmlChar * input,
+ xmlC14NNormalizationMode mode)
+{
+ const xmlChar *cur = input;
+ xmlChar *buffer = NULL;
+ xmlChar *out = NULL;
+ int buffer_size = 0;
+
+ if (input == NULL)
+ return (NULL);
+
+ /*
+ * allocate an translation buffer.
+ */
+ buffer_size = 1000;
+ buffer = (xmlChar *) xmlMallocAtomic(buffer_size * sizeof(xmlChar));
+ if (buffer == NULL) {
+ xmlC14NErrMemory("allocating buffer");
+ return (NULL);
+ }
+ out = buffer;
+
+ while (*cur != '\0') {
+ if ((out - buffer) > (buffer_size - 10)) {
+ int indx = out - buffer;
+
+ growBufferReentrant();
+ out = &buffer[indx];
+ }
+
+ if ((*cur == '<') && ((mode == XMLC14N_NORMALIZE_ATTR) ||
+ (mode == XMLC14N_NORMALIZE_TEXT))) {
+ *out++ = '&';
+ *out++ = 'l';
+ *out++ = 't';
+ *out++ = ';';
+ } else if ((*cur == '>') && (mode == XMLC14N_NORMALIZE_TEXT)) {
+ *out++ = '&';
+ *out++ = 'g';
+ *out++ = 't';
+ *out++ = ';';
+ } else if ((*cur == '&') && ((mode == XMLC14N_NORMALIZE_ATTR) ||
+ (mode == XMLC14N_NORMALIZE_TEXT))) {
+ *out++ = '&';
+ *out++ = 'a';
+ *out++ = 'm';
+ *out++ = 'p';
+ *out++ = ';';
+ } else if ((*cur == '"') && (mode == XMLC14N_NORMALIZE_ATTR)) {
+ *out++ = '&';
+ *out++ = 'q';
+ *out++ = 'u';
+ *out++ = 'o';
+ *out++ = 't';
+ *out++ = ';';
+ } else if ((*cur == '\x09') && (mode == XMLC14N_NORMALIZE_ATTR)) {
+ *out++ = '&';
+ *out++ = '#';
+ *out++ = 'x';
+ *out++ = '9';
+ *out++ = ';';
+ } else if ((*cur == '\x0A') && (mode == XMLC14N_NORMALIZE_ATTR)) {
+ *out++ = '&';
+ *out++ = '#';
+ *out++ = 'x';
+ *out++ = 'A';
+ *out++ = ';';
+ } else if ((*cur == '\x0D') && ((mode == XMLC14N_NORMALIZE_ATTR) ||
+ (mode == XMLC14N_NORMALIZE_TEXT) ||
+ (mode == XMLC14N_NORMALIZE_COMMENT) ||
+ (mode == XMLC14N_NORMALIZE_PI))) {
+ *out++ = '&';
+ *out++ = '#';
+ *out++ = 'x';
+ *out++ = 'D';
+ *out++ = ';';
+ } else {
+ /*
+ * Works because on UTF-8, all extended sequences cannot
+ * result in bytes in the ASCII range.
+ */
+ *out++ = *cur;
+ }
+ cur++;
+ }
+ *out++ = 0;
+ return (buffer);
+}
+
+#endif /* defined(LIBXML_OUTPUT_ENABLED) && defined(LIBXML_C14N_ENABLED) */