webengine/osswebengine/WebCore/platform/symbian/Libxml2/Libxml2_parserInternals.c
/*
* parserInternals.c : Internal routines (and obsolete ones) needed for the
* XML and HTML parsers.
*
* See Copyright for the status of this software.
*
* daniel@veillard.com
*/
#define IN_LIBXML
#include "XmlEnglibxml.h"
#if defined(WIN32) && !defined (__CYGWIN__)
#define XML_DIR_SEP '\\'
#else
#define XML_DIR_SEP '/'
#endif
#include <string.h>
#ifdef HAVE_CTYPE_H
#include <ctype.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_ZLIB_H
#include <zlib.h>
#endif
#include "Libxml2_globals.h"
//#include "Libxml2_xmlmemory.h"
//#include "Libxml2_tree.h"
//#include "Libxml2_parser.h"
#include "Libxml2_parserInternals.h"
//#include "Libxml2_valid.h"
//#include "Libxml2_entities.h"
//#include "Libxml2_xmlerror.h"
//#include "Libxml2_encoding.h"
//#include "Libxml2_valid.h"
//#include "Libxml2_xmlIO.h"
#include "Libxml2_uri.h"
//#include "Libxml2_dict.h"
//#include "Libxml2_SAX.h"
#ifdef LIBXML_CATALOG_ENABLED
#include <catalog.h>
#endif
//#include "Libxml2_chvalid.h"
/*
* Various global defaults for parsing
*/
/**
* xmlCheckVersion:
* @version: the include version number
*
* check the compiled lib version against the include one.
* This can warn or immediately kill the application
*/
void
xmlCheckVersion(int version) {
int myversion = (int) LIBXML_VERSION;
xmlInitParser();
if ((myversion / 10000) != (version / 10000)) {
xmlGenericError(xmlGenericErrorContext,
EMBED_ERRTXT("Fatal: program compiled against libxml %d using libxml %d\n"),
(version / 10000), (myversion / 10000));
fprintf(stderr,
EMBED_ERRTXT("Fatal: program compiled against libxml %d using libxml %d\n"),
(version / 10000), (myversion / 10000));
}
if ((myversion / 100) < (version / 100)) {
xmlGenericError(xmlGenericErrorContext,
EMBED_ERRTXT("Warning: program compiled against libxml %d using older %d\n"),
(version / 100), (myversion / 100));
}
}
const xmlChar xmlStringText[] = { 't', 'e', 'x', 't', 0 };
const xmlChar xmlStringTextNoenc[] = { 't', 'e', 'x', 't', 'n', 'o', 'e', 'n', 'c', 0 };
const xmlChar xmlStringComment[] = { 'c', 'o', 'm', 'm', 'e', 'n', 't', 0 };
/************************************************************************
* *
* Some factorized error routines *
* *
************************************************************************/
/**
* xmlErrMemory:
* @ctxt: an XML parser context
* @extra: extra informations
*
* Handle a redefinition of attribute error
*
* OOM: this function is called when OOM happens --> sets OOM flag
*/
void
xmlErrMemory(xmlParserCtxtPtr ctxt, const char *extra)
{
SET_OOM_FLAG;
return; // TODO: Add logging
if ((ctxt != NULL) && (ctxt->disableSAX != 0) &&
(ctxt->instate == XML_PARSER_EOF))
return;
if (ctxt != NULL) {
ctxt->errNo = XML_ERR_NO_MEMORY;
ctxt->instate = XML_PARSER_EOF;
ctxt->disableSAX = 1;
}
if (extra)
__xmlRaiseError(NULL, NULL, NULL, ctxt, NULL, XML_FROM_PARSER,
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, ctxt, NULL, XML_FROM_PARSER,
XML_ERR_NO_MEMORY, XML_ERR_FATAL, NULL, 0, NULL,
NULL, NULL, 0, 0, EMBED_ERRTXT("Memory allocation failed\n"));
}
/**
* __xmlErrEncoding:
* @ctxt: an XML parser context
* @error: the error number
* @msg: the error message
* @str1: an string info
* @str2: an string info
*
* Handle an encoding error
*/
void
__xmlErrEncoding(xmlParserCtxtPtr ctxt, xmlParserErrors error,
const char *msg, const xmlChar * str1, const xmlChar * str2)
{
if ((ctxt != NULL) && (ctxt->disableSAX != 0) &&
(ctxt->instate == XML_PARSER_EOF))
return;
if (ctxt != NULL)
ctxt->errNo = error;
__xmlRaiseError(NULL, NULL, NULL,
ctxt, NULL, XML_FROM_PARSER, error, XML_ERR_FATAL,
NULL, 0, (const char *) str1, (const char *) str2,
NULL, 0, 0, msg, str1, str2);
if (ctxt != NULL) {
ctxt->wellFormed = 0;
if (ctxt->recovery == 0)
ctxt->disableSAX = 1;
}
}
/**
* xmlErrInternal:
* @ctxt: an XML parser context
* @msg: the error message
* @str: error informations
*
* Handle an internal error
*/
static void
xmlErrInternal(xmlParserCtxtPtr ctxt, const char *msg, const xmlChar * str)
{
if ((ctxt != NULL) && (ctxt->disableSAX != 0) &&
(ctxt->instate == XML_PARSER_EOF))
return;
if (ctxt != NULL)
ctxt->errNo = XML_ERR_INTERNAL_ERROR;
__xmlRaiseError(NULL, NULL, NULL,
ctxt, NULL, XML_FROM_PARSER, XML_ERR_INTERNAL_ERROR,
XML_ERR_FATAL, NULL, 0, (const char *) str, NULL, NULL,
0, 0, msg, str);
if (ctxt != NULL) {
ctxt->wellFormed = 0;
if (ctxt->recovery == 0)
ctxt->disableSAX = 1;
}
}
/**
* xmlErrEncodingInt:
* @ctxt: an XML parser context
* @error: the error number
* @msg: the error message
* @val: an integer value
*
* n encoding error
*/
static void
xmlErrEncodingInt(xmlParserCtxtPtr ctxt, xmlParserErrors error,
const char *msg, int val)
{
if ((ctxt != NULL) && (ctxt->disableSAX != 0) &&
(ctxt->instate == XML_PARSER_EOF))
return;
if (ctxt != NULL)
ctxt->errNo = error;
__xmlRaiseError(NULL, NULL, NULL,
ctxt, NULL, XML_FROM_PARSER, error, XML_ERR_FATAL,
NULL, 0, NULL, NULL, NULL, val, 0, msg, val);
if (ctxt != NULL) {
ctxt->wellFormed = 0;
if (ctxt->recovery == 0)
ctxt->disableSAX = 1;
}
}
//TODO: Define as macro or inline function
/**
* xmlIsLetter:
* @c: an unicode character (int)
*
* Check whether the character is allowed by the production
* [84] Letter ::= BaseChar | Ideographic
*
* Returns 0 if not, non-zero otherwise
*/
int
xmlIsLetter(int c) {
return(IS_BASECHAR(c) || IS_IDEOGRAPHIC(c));
}
/************************************************************************
* *
* Input handling functions for progressive parsing *
* *
************************************************************************/
/* #define DEBUG_INPUT */
/* #define DEBUG_STACK */
/* #define DEBUG_PUSH */
/* we need to keep enough input to show errors in context */
#define LINE_LEN 80
#ifdef DEBUG_INPUT
#define CHECK_BUFFER(in) check_buffer(in)
/**
OOM: never
*/
static
void check_buffer(xmlParserInputPtr in) {
if (in->base != in->buf->buffer->content) {
xmlGenericError(xmlGenericErrorContext,EMBED_ERRTXT("xmlParserInput: base mismatch problem\n"));
}
if (in->cur < in->base) {
xmlGenericError(xmlGenericErrorContext,EMBED_ERRTXT("xmlParserInput: cur < base problem\n"));
}
if (in->cur > in->base + in->buf->buffer->use) {
xmlGenericError(xmlGenericErrorContext,EMBED_ERRTXT("xmlParserInput: cur > base + use problem\n"));
}
xmlGenericError(xmlGenericErrorContext,EMBED_ERRTXT("buffer %x : content %x, cur %d, use %d, size %d\n"),
(int) in, (int) in->buf->buffer->content, in->cur - in->base,
in->buf->buffer->use, in->buf->buffer->size);
}
#else
#define CHECK_BUFFER(in)
#endif
/**
* xmlParserInputRead:
* @in: an XML parser input
* @len: an indicative size for the lookahead
*
* This function refresh the input for the parser. It doesn't try to
* preserve pointers to the input buffer, and discard already read data
*
* Returns the number of xmlChars read, or -1 in case of error, 0 indicate the
* end of this entity
*/
int
xmlParserInputRead(xmlParserInputPtr in, int len) {
int ret;
int used;
int indx;
#ifdef DEBUG_INPUT
xmlGenericError(xmlGenericErrorContext, "Read\n");
#endif
if (in->buf == NULL) return(-1);
if (in->base == NULL) return(-1);
if (in->cur == NULL) return(-1);
if (in->buf->buffer == NULL) return(-1);
if (in->buf->readcallback == NULL) return(-1);
CHECK_BUFFER(in);
used = in->cur - in->buf->buffer->content;
ret = xmlBufferShrink(in->buf->buffer, used);
if (ret > 0) {
in->cur -= ret;
in->consumed += ret;
}
ret = xmlParserInputBufferRead(in->buf, len);
if (in->base != in->buf->buffer->content) {
/*
* the buffer has been reallocated
*/
indx = in->cur - in->base;
in->base = in->buf->buffer->content;
in->cur = &in->buf->buffer->content[indx];
}
in->end = &in->buf->buffer->content[in->buf->buffer->use];
CHECK_BUFFER(in);
return(ret);
}
/**
* xmlParserInputGrow:
* @in: an XML parser input
* @len: an indicative size for the lookahead
*
* This function increase the input for the parser. It tries to
* preserve pointers to the input buffer, and keep already read data
*
* Returns the number of xmlChars read, or -1 in case of error, 0 indicate the
* end of this entity
*
* OOM: possible --> OOM flag is set when returns -1
*/
int
xmlParserInputGrow(xmlParserInputPtr in, int len) {
int ret;
int indx;
#ifdef DEBUG_INPUT
xmlGenericError(xmlGenericErrorContext, "Grow\n");
#endif
if (in->buf == NULL) return(-1);
if (in->base == NULL) return(-1);
if (in->cur == NULL) return(-1);
if (in->buf->buffer == NULL) return(-1);
CHECK_BUFFER(in);
indx = in->cur - in->base;
if (in->buf->buffer->use > (unsigned int) indx + INPUT_CHUNK)
{
CHECK_BUFFER(in);
return(0);
}
if (!in->buf->readcallback)
return(0);
ret = xmlParserInputBufferGrow(in->buf, len);
if(OOM_FLAG)
return -1;
/*
* NOTE : in->base may be a "dangling" i.e. freed pointer in this
* block, but we use it really as an integer to do some
* pointer arithmetic. Insure will raise it as a bug but in
* that specific case, that's not !
*/
if (in->base != in->buf->buffer->content) {
/*
* the buffer has been reallocated
*/
indx = in->cur - in->base;
in->base = in->buf->buffer->content;
in->cur = &in->buf->buffer->content[indx];
}
in->end = &in->buf->buffer->content[in->buf->buffer->use];
CHECK_BUFFER(in);
return(ret);
}
/**
* xmlParserInputShrink:
* @in: an XML parser input
*
* This function removes used input for the parser.
*/
void
xmlParserInputShrink(xmlParserInputPtr in) {
int used;
int ret;
int indx;
#ifdef DEBUG_INPUT
xmlGenericError(xmlGenericErrorContext, "Shrink\n");
#endif
if (in->buf == NULL) return;
if (in->base == NULL) return;
if (in->cur == NULL) return;
if (in->buf->buffer == NULL) return;
CHECK_BUFFER(in);
used = in->cur - in->buf->buffer->content;
/*
* Do not shrink on large buffers whose only a tiny fraction
* was consumed
*/
if (used > INPUT_CHUNK) {
ret = xmlBufferShrink(in->buf->buffer, used - LINE_LEN);
if (ret > 0) {
in->cur -= ret;
in->consumed += ret;
}
in->end = &in->buf->buffer->content[in->buf->buffer->use];
}
CHECK_BUFFER(in);
if (in->buf->buffer->use > INPUT_CHUNK) {
return;
}
xmlParserInputBufferRead(in->buf, 2 * INPUT_CHUNK);
if (in->base != in->buf->buffer->content) {
/*
* the buffer has been reallocated
*/
indx = in->cur - in->base;
in->base = in->buf->buffer->content;
in->cur = &in->buf->buffer->content[indx];
}
in->end = &in->buf->buffer->content[in->buf->buffer->use];
CHECK_BUFFER(in);
}
/************************************************************************
* *
* UTF8 character input and related functions *
* *
************************************************************************/
/**
* xmlNextChar:
* @ctxt: the XML parser context
*
* Skip to the next char input char.
*
* OOM (REVIEW NOT FINISHED): possible --> check OOM flag
*/
void
xmlNextChar(xmlParserCtxtPtr ctxt)
{
if (ctxt->instate == XML_PARSER_EOF)
return;
if (ctxt->charset == XML_CHAR_ENCODING_UTF8) {
if ((*ctxt->input->cur == 0) &&
(xmlParserInputGrow(ctxt->input, INPUT_CHUNK) <= 0) && // May get into OOM
(ctxt->instate != XML_PARSER_COMMENT))
{
/*
* If we are at the end of the current entity and
* the context allows it, we pop consumed entities
* automatically.
* the auto closing should be blocked in other cases
*/
xmlPopInput(ctxt);
if(OOM_FLAG)
return;
} else {
const unsigned char *cur;
unsigned char c;
/*
* 2.11 End-of-Line Handling
* the literal two-character sequence "#xD#xA" or a standalone
* literal #xD, an XML processor must pass to the application
* the single character #xA.
*/
if (*(ctxt->input->cur) == '\n') {
ctxt->input->line++;
ctxt->input->col = 1;
} else
ctxt->input->col++;
/*
* 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
*/
cur = ctxt->input->cur;
c = *cur;
if (c & 0x80) {
if (c == 0xC0)
goto encoding_error;
if (cur[1] == 0){
xmlParserInputGrow(ctxt->input, INPUT_CHUNK);
if(OOM_FLAG)
return;
}
if ((cur[1] & 0xc0) != 0x80)
goto encoding_error;
if ((c & 0xe0) == 0xe0)
{
unsigned int val;
if (cur[2] == 0){
xmlParserInputGrow(ctxt->input, INPUT_CHUNK);
if(OOM_FLAG)
return;
}
if ((cur[2] & 0xc0) != 0x80)
goto encoding_error;
if ((c & 0xf0) == 0xf0)
{
if (cur[3] == 0){
xmlParserInputGrow(ctxt->input, INPUT_CHUNK);
if(OOM_FLAG)
return;
}
if (((c & 0xf8) != 0xf0) ||
((cur[3] & 0xc0) != 0x80))
goto encoding_error;
/* 4-byte code */
ctxt->input->cur += 4;
val = (cur[0] & 0x7) << 18;
val |= (cur[1] & 0x3f) << 12;
val |= (cur[2] & 0x3f) << 6;
val |= cur[3] & 0x3f;
} else {
/* 3-byte code */
ctxt->input->cur += 3;
val = (cur[0] & 0xf) << 12;
val |= (cur[1] & 0x3f) << 6;
val |= cur[2] & 0x3f;
}
if (((val > 0xd7ff) && (val < 0xe000)) ||
((val > 0xfffd) && (val < 0x10000)) ||
(val >= 0x110000))
{
xmlErrEncodingInt(ctxt, XML_ERR_INVALID_CHAR,
EMBED_ERRTXT("Char 0x%X out of allowed range\n"),
val);
}
}else{
/* 2-byte code */
ctxt->input->cur += 2;
}
}else{
/* 1-byte code */
ctxt->input->cur++;
}
ctxt->nbChars++;
if (*ctxt->input->cur == 0){
xmlParserInputGrow(ctxt->input, INPUT_CHUNK);
if(OOM_FLAG)
return;
}
}
} else {
/*
* Assume it's a fixed length encoding (1) with
* a compatible encoding for the ASCII set, since
* XML constructs only use < 128 chars
*/
if (*(ctxt->input->cur) == '\n') {
ctxt->input->line++;
ctxt->input->col = 1;
}else{
ctxt->input->col++;
}
ctxt->input->cur++;
ctxt->nbChars++;
if (*ctxt->input->cur == 0){
xmlParserInputGrow(ctxt->input, INPUT_CHUNK);
if(OOM_FLAG)
return;
}
} // TODO: OOM:
if ((*ctxt->input->cur == '%') && (!ctxt->html)){
xmlParserHandlePEReference(ctxt);//ISSUE: OOM review pending
}
if ((*ctxt->input->cur == 0) &&
(xmlParserInputGrow(ctxt->input, INPUT_CHUNK) <= 0)) // TODO: OOM:
{
xmlPopInput(ctxt); // may set OOM flag -- not checked here
}
return;
encoding_error:
/*
* If we detect an UTF8 error that probably mean 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 !)
*/
__xmlErrEncoding(ctxt, XML_ERR_INVALID_CHAR,
EMBED_ERRTXT("Input is not proper UTF-8, indicate encoding !\n"),
NULL, NULL);
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL)) {
ctxt->sax->error(ctxt->userData,
EMBED_ERRTXT("Bytes: 0x%02X 0x%02X 0x%02X 0x%02X\n"),
ctxt->input->cur[0], ctxt->input->cur[1],
ctxt->input->cur[2], ctxt->input->cur[3]);
}
ctxt->charset = XML_CHAR_ENCODING_8859_1;
ctxt->input->cur++;
return;
}
/**
* xmlCurrentChar:
* @ctxt: the XML parser context
* @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. Implement the end of line normalization:
* 2.11 End-of-Line Handling
* Wherever an external parsed entity or the literal entity value
* of an internal parsed entity contains either the literal two-character
* sequence "#xD#xA" or a standalone literal #xD, an XML processor
* must pass to the application the single character #xA.
* This behavior can conveniently be produced by normalizing all
* line breaks to #xA on input, before parsing.)
*
* Returns the current char value and its length
*
* OOM: possible --> OOM flag is set when returns 0
*/
int
xmlCurrentChar(xmlParserCtxtPtr ctxt, int *len) {
if (ctxt->instate == XML_PARSER_EOF)
return(0);
if ((*ctxt->input->cur >= 0x20) && (*ctxt->input->cur <= 0x7F))
{
*len = 1;
return((int) *ctxt->input->cur);
}
if (ctxt->charset == XML_CHAR_ENCODING_UTF8)
{
/*
* 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
*/
const unsigned char *cur = ctxt->input->cur;
unsigned char c;
unsigned int val;
c = *cur;
// TODO: OPTIMIZE: swap branches in this IF (sequential access to the "not" part is faster)
if (c & 0x80)
{
if (c == 0xC0)
goto encoding_error;
if (cur[1] == 0){
xmlParserInputGrow(ctxt->input, INPUT_CHUNK);
if(OOM_FLAG)
return 0;
}
if ((cur[1] & 0xc0) != 0x80)
goto encoding_error;
if ((c & 0xe0) == 0xe0)
{
if (cur[2] == 0){
xmlParserInputGrow(ctxt->input, INPUT_CHUNK);
if(OOM_FLAG)
return 0;
}
if ((cur[2] & 0xc0) != 0x80)
goto encoding_error;
if ((c & 0xf0) == 0xf0)
{
if (cur[3] == 0){
xmlParserInputGrow(ctxt->input, INPUT_CHUNK);
if(OOM_FLAG)
return 0;
}
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)) {
xmlErrEncodingInt(ctxt, XML_ERR_INVALID_CHAR,
EMBED_ERRTXT("Char 0x%X out of allowed range\n"), val);
}
return(val);
} // if (c & 0x80)
else
{
/* 1-byte code */
*len = 1;
if (*ctxt->input->cur == 0xD) {
if (ctxt->input->cur[1] == 0xA) {
ctxt->nbChars++;
ctxt->input->cur++;
}
return(0xA);
}
return((int) *ctxt->input->cur);
}
} // if (ctxt->charset == XML_CHAR_ENCODING_UTF8)
/*
* Assume it's a fixed length encoding (1) with
* a compatible encoding for the ASCII set, since
* XML constructs only use < 128 chars
*/
*len = 1;
if (*ctxt->input->cur == 0xD) {
if (ctxt->input->cur[1] == 0xA) {
ctxt->nbChars++;
ctxt->input->cur++;
}
return(0xA);
}
return((int) *ctxt->input->cur);
encoding_error:
/*
* An encoding problem may arise from a truncated input buffer
* splitting a character in the middle. In that case do not raise
* an error but return 0 to endicate an end of stream problem
*/
if (ctxt->input->end - ctxt->input->cur < 4) {
*len = 0;
return(0);
}
/*
* If we detect an UTF8 error that probably mean 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 !)
*/
__xmlErrEncoding(ctxt, XML_ERR_INVALID_CHAR,
EMBED_ERRTXT("Input is not proper UTF-8, indicate encoding !\n"),
NULL, NULL);
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
{
ctxt->sax->error(
ctxt->userData,
EMBED_ERRTXT("Bytes: 0x%02X 0x%02X 0x%02X 0x%02X\n"),
ctxt->input->cur[0],
ctxt->input->cur[1],
ctxt->input->cur[2],
ctxt->input->cur[3]);
}
ctxt->charset = XML_CHAR_ENCODING_8859_1;
*len = 1;
return((int) *ctxt->input->cur);
}
/**
* xmlStringCurrentChar:
* @ctxt: the XML 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
*/
int
xmlStringCurrentChar(xmlParserCtxtPtr ctxt, const xmlChar * cur, int *len)
{
if ((ctxt == NULL) || (ctxt->charset == XML_CHAR_ENCODING_UTF8)) {
/*
* 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
*/
unsigned char c;
unsigned int val;
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)) {
xmlErrEncodingInt(ctxt, XML_ERR_INVALID_CHAR,
EMBED_ERRTXT("Char 0x%X out of allowed range\n"), val);
}
return (val);
} else {
/* 1-byte code */
*len = 1;
return ((int) *cur);
}
}
/*
* Assume it's a fixed length encoding (1) with
* a compatible encoding for the ASCII set, since
* XML constructs only use < 128 chars
*/
*len = 1;
return ((int) *cur);
encoding_error:
/*
* If we detect an UTF8 error that probably mean 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 !)
*/
__xmlErrEncoding(ctxt, XML_ERR_INVALID_CHAR,
EMBED_ERRTXT("Input is not proper UTF-8, indicate encoding !\n"),
NULL, NULL);
if ((ctxt != NULL) && (ctxt->sax != NULL) && (ctxt->sax->error != NULL)) {
ctxt->sax->error(ctxt->userData,
EMBED_ERRTXT("Bytes: 0x%02X 0x%02X 0x%02X 0x%02X\n"),
ctxt->input->cur[0], ctxt->input->cur[1],
ctxt->input->cur[2], ctxt->input->cur[3]);
}
*len = 1;
return ((int) *cur);
}
/**
* xmlCopyCharMultiByte:
* @out: pointer to an array of xmlChar
* @val: the char value
*
* append the char value in the array
*
* Returns the number of xmlChar written
*
* OOM: never
*/
int
xmlCopyCharMultiByte(xmlChar *out, int val) {
/*
* 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
*/
if (val >= 0x80) {
xmlChar *savedout = out;
int bits;
if (val < 0x800)
{ *out++= (val >> 6) | 0xC0; bits= 0; }
else if (val < 0x10000)
{ *out++= (val >> 12) | 0xE0; bits= 6;}
else if (val < 0x110000)
{ *out++= (val >> 18) | 0xF0; bits= 12; }
else
{
xmlErrEncodingInt(NULL, XML_ERR_INVALID_CHAR,
EMBED_ERRTXT("Internal error, xmlCopyCharMultiByte 0x%X out of bound\n"),
val);
return(0);
}
for ( ; bits >= 0; bits-= 6)
*out++= ((val >> bits) & 0x3F) | 0x80 ;
return (out - savedout);
}
*out = (xmlChar) val;
return 1;
}
/**
* xmlCopyChar:
* @len: Ignored, compatibility
* @out: pointer to an array of xmlChar
* @val: the char value
*
* append the char value in the array
*
* Returns the number of xmlChar written
*/
int
xmlCopyChar(int len ATTRIBUTE_UNUSED, xmlChar *out, int val) {
/* the len parameter is ignored */
if (val >= 0x80) {
return(xmlCopyCharMultiByte (out, val));
}
*out = (xmlChar) val;
return 1;
}
/************************************************************************
* *
* Commodity functions to switch encodings *
* *
************************************************************************/
/**
* xmlSwitchEncoding:
* @ctxt: the parser context
* @enc: the encoding value (number)
*
* change the input functions when discovering the character encoding
* of a given entity.
*
* Returns 0 in case of success, -1 otherwise
*
* OOM: possible --> OOM flag is set -- check it always!
*/
int
xmlSwitchEncoding(xmlParserCtxtPtr ctxt, xmlCharEncoding enc)
{
xmlCharEncodingHandlerPtr handler;
//TODO: OPTIMIZE: preevaluate and reuse ctxt->input and ctxt->input->cur
switch (enc) {
case XML_CHAR_ENCODING_ERROR:
__xmlErrEncoding(ctxt, XML_ERR_UNKNOWN_ENCODING,
EMBED_ERRTXT("encoding unknown\n"), NULL, NULL);
break;
case XML_CHAR_ENCODING_NONE:
/* let's assume it's UTF-8 without the XML decl */
ctxt->charset = XML_CHAR_ENCODING_UTF8;
return(0);
case XML_CHAR_ENCODING_UTF8:
/* default encoding, no conversion should be needed */
ctxt->charset = XML_CHAR_ENCODING_UTF8;
/*
* Errata on XML-1.0 June 20 2001
* Specific handling of the Byte Order Mark for
* UTF-8
*/
if ((ctxt->input != NULL) &&
(ctxt->input->cur[0] == 0xEF) &&
(ctxt->input->cur[1] == 0xBB) &&
(ctxt->input->cur[2] == 0xBF))
{
ctxt->input->cur += 3;
}
return(0);
case XML_CHAR_ENCODING_UTF16LE:
case XML_CHAR_ENCODING_UTF16BE:
/*The raw input characters are encoded
*in UTF-16. As we expect this function
*to be called after xmlCharEncInFunc, we expect
*ctxt->input->cur to contain UTF-8 encoded characters.
*So the raw UTF16 Byte Order Mark
*has also been converted into
*an UTF-8 BOM. Let's skip that BOM.
*/
if ((ctxt->input != NULL) &&
(ctxt->input->cur[0] == 0xEF) &&
(ctxt->input->cur[1] == 0xBB) &&
(ctxt->input->cur[2] == 0xBF))
{
ctxt->input->cur += 3;
}
break ;
default:
break;
}
handler = xmlGetCharEncodingHandler(enc);
if (handler == NULL) {
if(OOM_FLAG)
return -1;
/*
* Default handlers.
*/
switch (enc) {
case XML_CHAR_ENCODING_ERROR:
__xmlErrEncoding(ctxt, XML_ERR_UNKNOWN_ENCODING,
EMBED_ERRTXT("encoding unknown\n"), NULL, NULL);
break;
case XML_CHAR_ENCODING_NONE:
/* let's assume it's UTF-8 without the XML decl */
ctxt->charset = XML_CHAR_ENCODING_UTF8;
return(0);
case XML_CHAR_ENCODING_UTF8:
case XML_CHAR_ENCODING_ASCII:
/* default encoding, no conversion should be needed */
ctxt->charset = XML_CHAR_ENCODING_UTF8;
return(0);
case XML_CHAR_ENCODING_UTF16LE:
break;
case XML_CHAR_ENCODING_UTF16BE:
break;
case XML_CHAR_ENCODING_UCS4LE:
__xmlErrEncoding(ctxt, XML_ERR_UNSUPPORTED_ENCODING,
EMBED_ERRTXT("encoding not supported %s\n"),
BAD_CAST "USC4 little endian", NULL);
break;
case XML_CHAR_ENCODING_UCS4BE:
__xmlErrEncoding(ctxt, XML_ERR_UNSUPPORTED_ENCODING,
EMBED_ERRTXT("encoding not supported %s\n"),
BAD_CAST "USC4 big endian", NULL);
break;
case XML_CHAR_ENCODING_EBCDIC:
__xmlErrEncoding(ctxt, XML_ERR_UNSUPPORTED_ENCODING,
EMBED_ERRTXT("encoding not supported %s\n"),
BAD_CAST "EBCDIC", NULL);
break;
case XML_CHAR_ENCODING_UCS4_2143:
__xmlErrEncoding(ctxt, XML_ERR_UNSUPPORTED_ENCODING,
EMBED_ERRTXT("encoding not supported %s\n"),
BAD_CAST "UCS4 2143", NULL);
break;
case XML_CHAR_ENCODING_UCS4_3412:
__xmlErrEncoding(ctxt, XML_ERR_UNSUPPORTED_ENCODING,
EMBED_ERRTXT("encoding not supported %s\n"),
BAD_CAST "UCS4 3412", NULL);
break;
case XML_CHAR_ENCODING_UCS2:
__xmlErrEncoding(ctxt, XML_ERR_UNSUPPORTED_ENCODING,
EMBED_ERRTXT("encoding not supported %s\n"),
BAD_CAST "UCS2", NULL);
break;
case XML_CHAR_ENCODING_8859_1:
case XML_CHAR_ENCODING_8859_2:
case XML_CHAR_ENCODING_8859_3:
case XML_CHAR_ENCODING_8859_4:
case XML_CHAR_ENCODING_8859_5:
case XML_CHAR_ENCODING_8859_6:
case XML_CHAR_ENCODING_8859_7:
case XML_CHAR_ENCODING_8859_8:
case XML_CHAR_ENCODING_8859_9:
/*
* We used to keep the internal content in the
* document encoding however this turns being unmaintainable
* So xmlGetCharEncodingHandler() will return non-null
* values for this now.
*/
if ((ctxt->inputNr == 1) &&
(ctxt->encoding == NULL) &&
(ctxt->input->encoding != NULL))
{
ctxt->encoding = xmlStrdup(ctxt->input->encoding);
}
ctxt->charset = enc;
return(0);
case XML_CHAR_ENCODING_2022_JP:
__xmlErrEncoding(ctxt, XML_ERR_UNSUPPORTED_ENCODING,
EMBED_ERRTXT("encoding not supported %s\n"),
BAD_CAST "ISO-2022-JP", NULL);
break;
case XML_CHAR_ENCODING_SHIFT_JIS:
__xmlErrEncoding(ctxt, XML_ERR_UNSUPPORTED_ENCODING,
EMBED_ERRTXT("encoding not supported %s\n"),
BAD_CAST "Shift_JIS", NULL);
break;
case XML_CHAR_ENCODING_EUC_JP:
__xmlErrEncoding(ctxt, XML_ERR_UNSUPPORTED_ENCODING,
EMBED_ERRTXT("encoding not supported %s\n"),
BAD_CAST "EUC-JP", NULL);
break;
}
}
if (handler == NULL)
return(-1);
ctxt->charset = XML_CHAR_ENCODING_UTF8;
return(xmlSwitchToEncoding(ctxt, handler));
}
/**
* xmlSwitchInputEncoding:
* @ctxt: the parser context
* @input: the input stream
* @handler: the encoding handler
*
* change the input functions when discovering the character encoding
* of a given entity.
*
* Returns 0 in case of success, -1 otherwise
*
* OOM: possible --> check OOM flag when -1 is returned
*/
int
xmlSwitchInputEncoding(xmlParserCtxtPtr ctxt, xmlParserInputPtr input,
xmlCharEncodingHandlerPtr handler)
{
int nbchars;
if (handler == NULL)
return (-1);
if (input == NULL)
return (-1);
if (input->buf != NULL) {
if (input->buf->encoder != NULL) {
/*
* Check in case the auto encoding detetection triggered
* in already.
*/
if (input->buf->encoder == handler)
return (0);
/*
* "UTF-16" can be used for both LE and BE
if ((!xmlStrncmp(BAD_CAST input->buf->encoder->name,
BAD_CAST "UTF-16", 6)) &&
(!xmlStrncmp(BAD_CAST handler->name,
BAD_CAST "UTF-16", 6))) {
return(0);
}
*/
/*
* Note: this is a bit dangerous, but that's what it
* takes to use nearly compatible signature for different
* encodings.
*/
xmlCharEncCloseFunc(input->buf->encoder);
input->buf->encoder = handler;
return (0);
}
input->buf->encoder = handler;
/*
* Is there already some content down the pipe to convert ?
*/
if ((input->buf->buffer != NULL) && (input->buf->buffer->use > 0))
{
int processed;
unsigned int use;
// TODO: OPTIMIZE: preevaluate handler->name -- handler is global!!
/*
* Specific handling of the Byte Order Mark for
* UTF-16
*/
if ((handler->name != NULL) &&
(!strcmp(handler->name, "UTF-16LE")) &&
(input->cur[0] == 0xFF) && (input->cur[1] == 0xFE))
{
input->cur += 2;
}
if ((handler->name != NULL) &&
(!strcmp(handler->name, "UTF-16BE")) &&
(input->cur[0] == 0xFE) && (input->cur[1] == 0xFF))
{
input->cur += 2;
}
/*
* Errata on XML-1.0 June 20 2001
* Specific handling of the Byte Order Mark for
* UTF-8
*/
if ((handler->name != NULL) &&
(!strcmp(handler->name, "UTF-8")) &&
(input->cur[0] == 0xEF) &&
(input->cur[1] == 0xBB) && (input->cur[2] == 0xBF))
{
input->cur += 3;
}
/*
* Shrink the current input buffer.
* Move it as the raw buffer and create a new input buffer
*/
processed = input->cur - input->base;
xmlBufferShrink(input->buf->buffer, processed);
input->buf->raw = input->buf->buffer;
input->buf->buffer = xmlBufferCreate();
input->buf->rawconsumed = processed;
use = input->buf->raw->use;
if (ctxt->html) {
/*
* convert as much as possible of the buffer
*/
nbchars = xmlCharEncInFunc(input->buf->encoder,
input->buf->buffer,
input->buf->raw);
} else {
/*
* convert just enough to get
* '<?xml version="1.0" encoding="xxx"?>'
* parsed with the autodetected encoding
* into the parser reading buffer.
*/
nbchars = xmlCharEncFirstLine(input->buf->encoder,
input->buf->buffer,
input->buf->raw);
}
if(OOM_FLAG)
return -1;
if (nbchars < 0) {
xmlErrInternal(ctxt,
EMBED_ERRTXT("switching encoding: encoder error\n"),
NULL);
return (-1);
}
input->buf->rawconsumed += use - input->buf->raw->use;
input->base = input->cur = input->buf->buffer->content;
input->end = &input->base[input->buf->buffer->use];
}
return (0);
} else {
if ((input->length == 0) || (input->buf == NULL)) {
/*
* When parsing a static memory array one must know the
* size to be able to convert the buffer.
*/
xmlErrInternal(ctxt, EMBED_ERRTXT("switching encoding : no input\n"), NULL);
return (-1);
} else {
int processed;
/*
* Shrink the current input buffer.
* Move it as the raw buffer and create a new input buffer
*/
processed = input->cur - input->base;
if(! (input->buf->raw = xmlBufferCreate()))
return -1; // OOM!
xmlBufferAdd(input->buf->raw, input->cur, input->length - processed);
if(OOM_FLAG)
return -1;
if(! (input->buf->buffer = xmlBufferCreate()))
return -1; // OOM!
/*
* convert as much as possible of the raw input
* to the parser reading buffer.
*/
nbchars = xmlCharEncInFunc(input->buf->encoder,
input->buf->buffer,
input->buf->raw);
if(OOM_FLAG)
return -1;
if (nbchars < 0) {
xmlErrInternal(ctxt,
EMBED_ERRTXT("switching encoding: encoder error\n"),
NULL);
return (-1);
}
/*
* Conversion succeeded, get rid of the old buffer
*/
if ((input->free != NULL) && (input->base != NULL))
input->free((xmlChar*) input->base);
input->base = input->cur = input->buf->buffer->content;
input->end = &input->base[input->buf->buffer->use];
}
}
return (0);
}
/**
* xmlSwitchToEncoding:
* @ctxt: the parser context
* @handler: the encoding handler
*
* change the input functions when discovering the character encoding
* of a given entity.
*
* Returns 0 in case of success, -1 otherwise
*
* OOM: possible --> OOM flag is set when -1 is returned
*/
int
xmlSwitchToEncoding(xmlParserCtxtPtr ctxt, xmlCharEncodingHandlerPtr handler)
{
if(!handler)
return -1;
if (ctxt->input != NULL) {
xmlSwitchInputEncoding(ctxt, ctxt->input, handler);
if(OOM_FLAG)
return -1;
} else {
xmlErrInternal(ctxt, EMBED_ERRTXT("xmlSwitchToEncoding : no input\n"), NULL);
return(-1);
}
/*
* The parsing is now done in UTF8 natively
*/
ctxt->charset = XML_CHAR_ENCODING_UTF8;
return(0);
}
/************************************************************************
* *
* Commodity functions to handle entities processing *
* *
************************************************************************/
/**
* xmlFreeInputStream:
* @input: an xmlParserInputPtr
*
* Free up an input stream.
*
* OOM: never
*/
void
xmlFreeInputStream(xmlParserInputPtr input) {
if (input == NULL) return;
if (input->filename != NULL) xmlFree((char *) input->filename);
if (input->directory != NULL) xmlFree((char *) input->directory);
if (input->encoding != NULL) xmlFree((char *) input->encoding);
if (input->version != NULL) xmlFree((char *) input->version);
if ((input->free != NULL) && (input->base != NULL))
input->free((xmlChar *) input->base);
if (input->buf != NULL)
xmlFreeParserInputBuffer(input->buf);
xmlFree(input);
}
/**
* xmlNewInputStream:
* @ctxt: an XML parser context
*
* Create a new input stream structure
* Returns the new input stream or NULL
*
* OOM: possible --> returns NULL, OOM flag is set
*/
xmlParserInputPtr
xmlNewInputStream(xmlParserCtxtPtr ctxt) {
xmlParserInputPtr input;
input = (xmlParserInputPtr) xmlMalloc(sizeof(xmlParserInput));
if (input == NULL) {
xmlErrMemory(ctxt, EMBED_ERRTXT("couldn't allocate a new input stream\n"));
return(NULL);
}
memset(input, 0, sizeof(xmlParserInput));
input->line = 1;
input->col = 1;
input->standalone = -1;
/*
* we don't care about thread reentrancy unicity for a single
* parser context (and hence thread) is sufficient.
*/
input->id = xmlInputStreamId++;
return(input);
}
/**
* xmlNewIOInputStream:
* @ctxt: an XML parser context
* @input: an I/O Input
* @enc: the charset encoding if known
*
* Create a new input stream structure encapsulating the @input into
* a stream suitable for the parser.
*
* Returns the new input stream or NULL
*/
xmlParserInputPtr
xmlNewIOInputStream(xmlParserCtxtPtr ctxt, xmlParserInputBufferPtr input,
xmlCharEncoding enc) {
xmlParserInputPtr inputStream;
if (xmlParserDebugEntities)
xmlGenericError(xmlGenericErrorContext, EMBED_ERRTXT("new input from I/O\n"));
inputStream = xmlNewInputStream(ctxt);
if (inputStream == NULL) {
return(NULL);
}
inputStream->filename = NULL;
inputStream->buf = input;
inputStream->base = inputStream->buf->buffer->content;
inputStream->cur = inputStream->buf->buffer->content;
inputStream->end = &inputStream->base[inputStream->buf->buffer->use];
if (enc != XML_CHAR_ENCODING_NONE) {
xmlSwitchEncoding(ctxt, enc);
}
return(inputStream);
}
/**
* xmlNewEntityInputStream:
* @ctxt: an XML parser context
* @entity: an Entity pointer
*
* Create a new input stream based on an xmlEntityPtr
*
* Returns the new input stream or NULL
*
* OOM:
*/
//ISSUE: unreviewed branch of code for OOM handling
xmlParserInputPtr
xmlNewEntityInputStream(xmlParserCtxtPtr ctxt, xmlEntityPtr entity) {
xmlParserInputPtr input;
if (entity == NULL) {
xmlErrInternal(ctxt, EMBED_ERRTXT("xmlNewEntityInputStream entity = NULL\n"), NULL);
return(NULL);
}
// TODO: OPTIMIZE: xmlParserDebugEntities shouldn't be a global variable -- rather a define
if (xmlParserDebugEntities)
xmlGenericError(xmlGenericErrorContext, EMBED_ERRTXT("new input from entity: %s\n"), entity->name);
if (entity->content == NULL) {
switch (entity->etype) {
case XML_EXTERNAL_GENERAL_UNPARSED_ENTITY:
xmlErrInternal(ctxt, EMBED_ERRTXT("Cannot parse entity %s\n"), entity->name);
break;
case XML_EXTERNAL_GENERAL_PARSED_ENTITY:
case XML_EXTERNAL_PARAMETER_ENTITY:
return(xmlLoadExternalEntity(
(char*) entity->URI,
(char*) entity->ExternalID, ctxt));
case XML_INTERNAL_GENERAL_ENTITY:
xmlErrInternal(ctxt,
EMBED_ERRTXT("Internal entity %s without content !\n"),
entity->name);
break;
case XML_INTERNAL_PARAMETER_ENTITY:
xmlErrInternal(ctxt,
EMBED_ERRTXT("Internal parameter entity %s without content !\n"),
entity->name);
break;
case XML_INTERNAL_PREDEFINED_ENTITY:
xmlErrInternal(ctxt,
EMBED_ERRTXT("Predefined entity %s without content !\n"),
entity->name);
break;
}
return(NULL);
}
input = xmlNewInputStream(ctxt);
if (input == NULL) {
return(NULL);
}
input->filename = (char *) entity->URI;
input->base = entity->content;
input->cur = entity->content;
input->length = entity->length;
input->end = &entity->content[input->length];
return(input);
}
/**
* xmlNewStringInputStream:
* @ctxt: an XML parser context
* @buffer: an memory buffer
*
* Create a new input stream based on a memory buffer.
* Returns the new input stream
*/
xmlParserInputPtr
xmlNewStringInputStream(xmlParserCtxtPtr ctxt, const xmlChar *buffer) {
xmlParserInputPtr input;
if (buffer == NULL) {
xmlErrInternal(ctxt, EMBED_ERRTXT("xmlNewStringInputStream string = NULL\n"),
NULL);
return(NULL);
}
if (xmlParserDebugEntities)
xmlGenericError(xmlGenericErrorContext,
EMBED_ERRTXT("new fixed input: %.30s\n"), buffer);
input = xmlNewInputStream(ctxt);
if (input == NULL) {
xmlErrMemory(ctxt, EMBED_ERRTXT("couldn't allocate a new input stream\n"));
return(NULL);
}
input->base = buffer;
input->cur = buffer;
input->length = xmlStrlen(buffer);
input->end = &buffer[input->length];
return(input);
}
/**
* xmlNewInputFromFile:
* @ctxt: an XML parser context
* @filename: the filename to use as entity
*
* Create a new input stream based on a file or an URL.
*
* Returns the new input stream or NULL in case of error
*/
xmlParserInputPtr
xmlNewInputFromFile(xmlParserCtxtPtr ctxt, const char *filename) {
xmlParserInputBufferPtr buf;
xmlParserInputPtr inputStream;
char *directory = NULL;
xmlChar *URI = NULL;
if (xmlParserDebugEntities)
xmlGenericError(xmlGenericErrorContext,
EMBED_ERRTXT("new input from file: %s\n"), filename);
if (ctxt == NULL) return(NULL);
buf = xmlParserInputBufferCreateFilename(filename, XML_CHAR_ENCODING_NONE);
if (buf == NULL) {
__xmlLoaderErr(ctxt, EMBED_ERRTXT("failed to load external entity \"%s\"\n"),
(const char *) filename);
return(NULL);
}
inputStream = xmlNewInputStream(ctxt);
if (inputStream == NULL) {
if (directory != NULL) xmlFree((char *) directory);
if (URI != NULL) xmlFree((char *) URI);
return(NULL);
}
inputStream->buf = buf;
inputStream = xmlCheckHTTPInput(ctxt, inputStream);
if (inputStream == NULL)
return(NULL);
if (inputStream->filename == NULL)
URI = xmlStrdup((xmlChar *) filename);
else
URI = xmlStrdup((xmlChar *) inputStream->filename);
directory = xmlParserGetDirectory((const char *) URI);
inputStream->filename = (char *) xmlCanonicPath((const xmlChar *) URI);
if (URI != NULL) xmlFree((char *) URI);
inputStream->directory = directory;
inputStream->base = inputStream->buf->buffer->content;
inputStream->cur = inputStream->buf->buffer->content;
inputStream->end = &inputStream->base[inputStream->buf->buffer->use];
if ((ctxt->directory == NULL) && (directory != NULL))
ctxt->directory = (char *) xmlStrdup((const xmlChar *) directory);
return(inputStream);
}
/************************************************************************
* *
* Commodity functions to handle parser contexts *
* *
************************************************************************/
/**
* xmlInitParserCtxt:
* @ctxt: an XML parser context
*
* Initialize a parser context
*
* Returns 0 in case of success and -1 in case of error
*
* OOM: possible --> returns -1; OOM flag is set
*/
int
xmlInitParserCtxt(xmlParserCtxtPtr ctxt)
{ // TODO: OOM handling - check OOM condition in all callers
// TODO: OPTIMIZE: there is too much of repeated code...
if(ctxt==NULL) {
xmlErrInternal(NULL, EMBED_ERRTXT("Got NULL parser context\n"), NULL);
return(-1);
}
xmlDefaultSAXHandlerInit();
if (! (ctxt->dict = xmlDictCreate())) {
xmlErrMemory(NULL, EMBED_ERRTXT("cannot initialize parser context\n"));
return(-1);
}
ctxt->sax = (xmlSAXHandler *) xmlMalloc(sizeof(xmlSAXHandler));
if (ctxt->sax == NULL) {
xmlErrMemory(NULL, EMBED_ERRTXT("cannot initialize parser context\n"));
return(-1);
}
else
xmlSAXVersion(ctxt->sax, 2);
ctxt->maxatts = 0;
ctxt->atts = NULL;
/* Allocate the Input stack */
ctxt->inputTab = (xmlParserInputPtr *) xmlMalloc(5 * sizeof(xmlParserInputPtr));
if (ctxt->inputTab == NULL) {
xmlErrMemory(NULL, EMBED_ERRTXT("cannot initialize parser context\n"));
goto OOM;
}
ctxt->inputNr = 0;
ctxt->inputMax = 5;
ctxt->input = NULL;
ctxt->version = NULL;
ctxt->encoding = NULL;
ctxt->standalone = -1;
ctxt->hasExternalSubset = 0;
ctxt->hasPErefs = 0;
ctxt->html = 0;
ctxt->external = 0;
ctxt->instate = XML_PARSER_START;
ctxt->token = 0;
ctxt->directory = NULL;
// TODO: "Magic numbers" for Nodes and Names stacks in parser context
/* Allocate the Node stack */
ctxt->nodeTab = (xmlNodePtr*) xmlMalloc(10 * sizeof(xmlNodePtr));
if (ctxt->nodeTab == NULL) {
xmlErrMemory(NULL, EMBED_ERRTXT("cannot initialize parser context\n"));
goto OOM_input_tab;
}
ctxt->nodeNr = 0;
ctxt->nodeMax = 10;
ctxt->node = NULL;
/* Allocate the Name stack */
ctxt->nameTab = (const xmlChar**) xmlMalloc(10 * sizeof(xmlChar*));
if (ctxt->nameTab == NULL) {
xmlErrMemory(NULL, EMBED_ERRTXT("cannot initialize parser context\n"));
goto OOM_node_tab;
}
ctxt->nameNr = 0;
ctxt->nameMax = 10;
ctxt->name = NULL;
/* Allocate the space stack */
ctxt->spaceTab = (int*) xmlMalloc(10 * sizeof(int));
if (ctxt->spaceTab == NULL) {
xmlErrMemory(NULL, EMBED_ERRTXT("cannot initialize parser context\n"));
goto OOM_name_tab;
}
ctxt->spaceNr = 1;
ctxt->spaceMax = 10;
ctxt->spaceTab[0] = -1;
ctxt->space = &ctxt->spaceTab[0];
ctxt->userData = ctxt;
ctxt->myDoc = NULL;
ctxt->wellFormed = 1;
ctxt->nsWellFormed = 1;
ctxt->valid = 1;
ctxt->loadsubset = xmlLoadExtDtdDefaultValue;
ctxt->validate = xmlDoValidityCheckingDefaultValue;
ctxt->pedantic = xmlPedanticParserDefaultValue;
#ifdef LIBXML_ENABLE_NODE_LINEINFO
ctxt->linenumbers = xmlLineNumbersDefaultValue;
#endif
ctxt->keepBlanks = xmlKeepBlanksDefaultValue;
if (ctxt->keepBlanks == 0)
ctxt->sax->ignorableWhitespace = xmlSAX2IgnorableWhitespace;
ctxt->vctxt.userData = ctxt;
ctxt->vctxt.error = xmlParserValidityError;
ctxt->vctxt.warning = xmlParserValidityWarning;
if (ctxt->validate) {
if (xmlGetWarningsDefaultValue == 0)
ctxt->vctxt.warning = NULL;
else
ctxt->vctxt.warning = xmlParserValidityWarning;
ctxt->vctxt.nodeMax = 0;
}
ctxt->replaceEntities = xmlSubstituteEntitiesDefaultValue;
ctxt->record_info = 0;
ctxt->nbChars = 0;
ctxt->checkIndex = 0;
ctxt->inSubset = 0;
ctxt->errNo = XML_ERR_OK;
ctxt->depth = 0;
ctxt->charset = XML_CHAR_ENCODING_UTF8;
ctxt->catalogs = NULL;
xmlInitNodeInfoSeq(&ctxt->node_seq);
return(0);
//----------------------------------------------- OOM handling
// >>: OPTIMIZE: Maybe just clear whole contents of *ctxt ? -- NO, we shouldn't free ctxt
// TODO: After all, do nothing.. let caller free partially constructed ctxt
OOM_name_tab:
xmlFree(ctxt->nameTab);
ctxt->nameTab = NULL;
ctxt->spaceNr = 0;
ctxt->spaceMax = 0;
ctxt->space = NULL;
OOM_node_tab:
xmlFree(ctxt->nodeTab);
ctxt->nodeTab = NULL;
ctxt->nameNr = 0;
ctxt->nameMax = 0;
ctxt->name = NULL;
OOM_input_tab:
xmlFree(ctxt->inputTab);
ctxt->inputTab = NULL;
ctxt->nodeNr = 0;
ctxt->nodeMax = 0;
ctxt->node = NULL;
OOM:
ctxt->inputNr = 0;
ctxt->inputMax = 0;
ctxt->input = NULL;
return -1;
}
/**
* xmlFreeParserCtxt:
* @ctxt: an XML parser context
*
* Free all the memory used by a parser context. However the parsed
* document in ctxt->myDoc is not freed.
*
* OOM: never
*/
void
xmlFreeParserCtxt(xmlParserCtxtPtr ctxt)
{
xmlParserInputPtr input;
if (ctxt == NULL) return;
while ((input = inputPop(ctxt)) != NULL) { /* Non consuming */
xmlFreeInputStream(input);
}
if (ctxt->spaceTab) xmlFree(ctxt->spaceTab);
if (ctxt->nameTab) xmlFree((xmlChar**)ctxt->nameTab);
if (ctxt->nodeTab) xmlFree(ctxt->nodeTab);
if (ctxt->inputTab) xmlFree(ctxt->inputTab);
if (ctxt->version) xmlFree((char*) ctxt->version);
if (ctxt->encoding) xmlFree((char*) ctxt->encoding);
if (ctxt->extSubURI)xmlFree((char*) ctxt->extSubURI);
if (ctxt->extSubSystem) xmlFree((char*) ctxt->extSubSystem);
#ifdef LIBXML_SAX1_ENABLED
if ((ctxt->sax) &&
(ctxt->sax != (xmlSAXHandlerPtr) &xmlDefaultSAXHandler))
#else
if (ctxt->sax)
#endif /* LIBXML_SAX1_ENABLED */
xmlFree(ctxt->sax);
if (ctxt->directory) xmlFree((char *) ctxt->directory);
if (ctxt->vctxt.nodeTab) xmlFree(ctxt->vctxt.nodeTab);
if (ctxt->atts) xmlFree((xmlChar * *)ctxt->atts);
if (ctxt->dict) xmlDictFree(ctxt->dict);
if (ctxt->nsTab) xmlFree((char *) ctxt->nsTab);
if (ctxt->pushTab) xmlFree(ctxt->pushTab);
if (ctxt->attallocs) xmlFree(ctxt->attallocs);
if (ctxt->attsDefault)
xmlHashFree(ctxt->attsDefault, (xmlHashDeallocator) xmlFree);
if (ctxt->attsSpecial)
xmlHashFree(ctxt->attsSpecial, NULL);
if (ctxt->freeElems) {
xmlNodePtr cur, next;
cur = ctxt->freeElems;
while (cur) {
next = cur->next;
xmlFree(cur);
cur = next;
}
}
if (ctxt->freeAttrs) {
xmlAttrPtr cur, next;
cur = ctxt->freeAttrs;
while (cur) {
next = cur->next;
xmlFree(cur);
cur = next;
}
}
/*
* cleanup the error strings
*/
xmlResetError(&ctxt->lastError);
#ifdef LIBXML_CATALOG_ENABLED
if (ctxt->catalogs != NULL)
xmlCatalogFreeLocal(ctxt->catalogs);
#endif
xmlFree(ctxt);
}
/**
* xmlNewParserCtxt:
*
* Allocate and initialize a new parser context.
*
* Returns the xmlParserCtxtPtr or NULL
*
* OOM: possible --> returns NULL, OOM flag is set
*/
xmlParserCtxtPtr
xmlNewParserCtxt()
{
xmlParserCtxtPtr ctxt;
ctxt = (xmlParserCtxtPtr) xmlMalloc(sizeof(xmlParserCtxt));
if (ctxt == NULL) {
xmlErrMemory(NULL, EMBED_ERRTXT("cannot allocate parser context\n"));
return(NULL);
}
memset(ctxt, 0, sizeof(xmlParserCtxt));
if (xmlInitParserCtxt(ctxt) < 0) {
// OOM!!!
xmlFreeParserCtxt(ctxt);
return(NULL);
}
return(ctxt);
}
/************************************************************************
* *
* Handling of node informations *
* *
************************************************************************/
/**
* xmlClearParserCtxt:
* @ctxt: an XML parser context
*
* Clear (release owned resources) and reinitialize a parser context
*/
void
xmlClearParserCtxt(xmlParserCtxtPtr ctxt)
{
if (ctxt==NULL)
return;
xmlClearNodeInfoSeq(&ctxt->node_seq);
xmlInitParserCtxt(ctxt);
}
/**
* xmlParserFindNodeInfo:
* @ctx: an XML parser context
* @node: an XML node within the tree
*
* Find the parser node info struct for a given node
*
* Returns an xmlParserNodeInfo block pointer or NULL
*/
const xmlParserNodeInfo* xmlParserFindNodeInfo(const xmlParserCtxtPtr ctx,
const xmlNodePtr node)
{
unsigned long pos;
/* Find position where node should be at */
pos = xmlParserFindNodeInfoIndex(&ctx->node_seq, node);
if (pos < ctx->node_seq.length && ctx->node_seq.buffer[pos].node == node)
return &ctx->node_seq.buffer[pos];
else
return NULL;
}
/**
* xmlInitNodeInfoSeq:
* @seq: a node info sequence pointer
*
* -- Initialize (set to initial state) node info sequence
*
* OOM: never
*/
void
xmlInitNodeInfoSeq(xmlParserNodeInfoSeqPtr seq)
{
seq->length = 0;
seq->maximum = 0;
seq->buffer = NULL;
}
/**
* xmlClearNodeInfoSeq:
* @seq: a node info sequence pointer
*
* -- Clear (release memory and reinitialize) node
* info sequence
*/
void
xmlClearNodeInfoSeq(xmlParserNodeInfoSeqPtr seq)
{
if ( seq->buffer != NULL )
xmlFree(seq->buffer);
xmlInitNodeInfoSeq(seq);
}
/**
* xmlParserFindNodeInfoIndex:
* @seq: a node info sequence pointer
* @node: an XML node pointer
*
*
* xmlParserFindNodeInfoIndex : Find the index that the info record for
* the given node is or should be at in a sorted sequence
*
* Returns a long indicating the position of the record
*/
unsigned long xmlParserFindNodeInfoIndex(const xmlParserNodeInfoSeqPtr seq,
const xmlNodePtr node)
{
unsigned long upper, lower, middle;
int found = 0;
/* Do a binary search for the key */
lower = 1;
upper = seq->length;
middle = 0;
while ( lower <= upper && !found) {
middle = lower + (upper - lower) / 2;
if ( node == seq->buffer[middle - 1].node )
found = 1;
else if ( node < seq->buffer[middle - 1].node )
upper = middle - 1;
else
lower = middle + 1;
}
/* Return position */
if ( middle == 0 || seq->buffer[middle - 1].node < node )
return middle;
else
return middle - 1;
}
/**
* xmlParserAddNodeInfo:
* @ctxt: an XML parser context
* @info: a node info sequence pointer
*
* Insert node info record into the sorted sequence
*/
// TODO: Remove as a part of recording mechanism
void
xmlParserAddNodeInfo(xmlParserCtxtPtr ctxt,
const xmlParserNodeInfoPtr info)
{
unsigned long pos;
/* Find pos and check to see if node is already in the sequence */
pos = xmlParserFindNodeInfoIndex(&ctxt->node_seq, (xmlNodePtr)
info->node);
if (pos < ctxt->node_seq.length
&& ctxt->node_seq.buffer[pos].node == info->node) {
ctxt->node_seq.buffer[pos] = *info;
}
/* Otherwise, we need to add new node to buffer */
else {
if (ctxt->node_seq.length + 1 > ctxt->node_seq.maximum) {
xmlParserNodeInfo *tmp_buffer;
unsigned int byte_size;
if (ctxt->node_seq.maximum == 0)
ctxt->node_seq.maximum = 2;
byte_size = (sizeof(*ctxt->node_seq.buffer) *
(2 * ctxt->node_seq.maximum));
if (ctxt->node_seq.buffer == NULL)
tmp_buffer = (xmlParserNodeInfo *) xmlMalloc(byte_size);
else
tmp_buffer =
(xmlParserNodeInfo *) xmlRealloc(ctxt->node_seq.buffer,
byte_size);
if (tmp_buffer == NULL) {
xmlErrMemory(ctxt, EMBED_ERRTXT("failed to allocate buffer\n"));
return;
}
ctxt->node_seq.buffer = tmp_buffer;
ctxt->node_seq.maximum *= 2;
}
/* If position is not at end, move elements out of the way */
if (pos != ctxt->node_seq.length) {
unsigned long i;
for (i = ctxt->node_seq.length; i > pos; i--)
ctxt->node_seq.buffer[i] = ctxt->node_seq.buffer[i - 1];
}
/* Copy element and increase length */
ctxt->node_seq.buffer[pos] = *info;
ctxt->node_seq.length++;
}
}
/************************************************************************
* *
* Defaults settings *
* *
************************************************************************/
/**
* xmlPedanticParserDefault:
* @val: int 0 or 1
*
* Set and return the previous value for enabling pedantic warnings.
*
* Returns the last value for 0 for no substitution, 1 for substitution.
*/
int
xmlPedanticParserDefault(int val) {
int old = xmlPedanticParserDefaultValue;
xmlPedanticParserDefaultValue = val;
return(old);
}
/**
* xmlSubstituteEntitiesDefault:
* @val: int 0 or 1
*
* Set and return the previous value for default entity support.
* Initially the parser always keep entity references instead of substituting
* entity values in the output. This function has to be used to change the
* default parser behavior
* SAX::substituteEntities() has to be used for changing that on a file by
* file basis.
*
* Returns the last value for 0 for no substitution, 1 for substitution.
*/
int
xmlSubstituteEntitiesDefault(int val) {
int old = xmlSubstituteEntitiesDefaultValue;
xmlSubstituteEntitiesDefaultValue = val;
return(old);
}
#ifndef XMLENGINE_EXCLUDE_UNUSED
/**
* xmlKeepBlanksDefault:
* @val: int 0 or 1
*
* Set and return the previous value for default blanks text nodes support.
* The 1.x version of the parser used an heuristic to try to detect
* ignorable white spaces. As a result the SAX callback was generating
* xmlSAX2IgnorableWhitespace() callbacks instead of characters() one, and when
* using the DOM output text nodes containing those blanks were not generated.
* The 2.x and later version will switch to the XML standard way and
* ignorableWhitespace() are only generated when running the parser in
* validating mode and when the current element doesn't allow CDATA or
* mixed content.
* This function is provided as a way to force the standard behavior
* on 1.X libs and to switch back to the old mode for compatibility when
* running 1.X client code on 2.X . Upgrade of 1.X code should be done
* by using xmlIsBlankNode() commodity function to detect the "empty"
* nodes generated.
* This value also affect autogeneration of indentation when saving code
* if blanks sections are kept, indentation is not generated.
*
* Returns the last value for 0 for no substitution, 1 for substitution.
*/
int
xmlKeepBlanksDefault(int val) {
int old = xmlKeepBlanksDefaultValue;
xmlKeepBlanksDefaultValue = val;
xmlIndentTreeOutput = !val;
return(old);
}
#ifdef LIBXML_ENABLE_NODE_LINEINFO
/**
* xmlLineNumbersDefault:
* @val: int 0 or 1
*
* Set and return the previous value for enabling line numbers in elements
* contents. This may break on old application and is turned off by default.
*
* Returns the last value for 0 for no substitution, 1 for substitution.
*/
int
xmlLineNumbersDefault(int val) {
int old = xmlLineNumbersDefaultValue;
xmlLineNumbersDefaultValue = val;
return(old);
}
#endif
#endif /* ifndef XMLENGINE_EXCLUDE_UNUSED */