lib/libxml2
1
0
Fork 0
mirror of https://gitlab.gnome.org/GNOME/libxml2.git synced 2025-04-23 10:28:05 +03:00
Code
libxml2/HTMLparser.c

2373 lines
64 KiB
C
Raw Blame History

/*
* HTMLparser.c : an HTML 4.0 non-verifying parser
*
* See Copyright for the status of this software.
*
* Daniel.Veillard@w3.org
*/
#ifdef WIN32
#define HAVE_FCNTL_H
#include <io.h>
#else
#include <config.h>
#endif
#include <stdio.h>
#include <ctype.h>
#include <string.h> /* for memset() only */
#include <stdlib.h>
#include <sys/stat.h>
#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 "tree.h"
#include "HTMLparser.h"
#include "entities.h"
#include "encoding.h"
#include "valid.h"
#include "parserInternals.h"
#define DEBUG
/************************************************************************
* *
* The list of HTML elements and their properties *
* *
************************************************************************/
typedef struct htmlElemDesc {
const CHAR *name; /* The tag name */
int startTag; /* Whether the start tag can be implied */
int endTag; /* Whether the end tag can be implied */
int empty; /* Is this an empty element ? */
int depr; /* Is this a deprecated element ? */
int dtd; /* 1: only in Loose DTD, 2: only Frameset one */
const char *desc; /* the description */
} htmlElemDesc, *htmlElemDescPtr;
/*
* Name Start Tag End Tag Empty Depr. DTD Description
*/
htmlElemDesc html40ElementTable[] = {
{ "A", 0, 0, 0, 0, 0, "anchor " },
{ "ABBR", 0, 0, 0, 0, 0, "abbreviated form" },
{ "ACRONYM", 0, 0, 0, 0, 0, "" },
{ "ADDRESS", 0, 0, 0, 0, 0, "information on author " },
{ "APPLET", 0, 0, 0, 1, 1, "Java applet " },
{ "AREA", 0, 2, 1, 0, 0, "client-side image map area " },
{ "B", 0, 0, 0, 0, 0, "bold text style" },
{ "BASE", 0, 2, 1, 0, 0, "document base URI " },
{ "BASEFONT", 0, 2, 1, 1, 1, "base font size " },
{ "BDO", 0, 0, 0, 0, 0, "I18N BiDi over-ride " },
{ "BIG", 0, 0, 0, 0, 0, "large text style" },
{ "BLOCKQUOTE", 0, 0, 0, 0, 0, "long quotation " },
{ "BODY", 1, 1, 0, 0, 0, "document body " },
{ "BR", 0, 2, 1, 0, 0, "forced line break " },
{ "BUTTON", 0, 0, 0, 0, 0, "push button " },
{ "CAPTION", 0, 0, 0, 0, 0, "table caption " },
{ "CENTER", 0, 0, 0, 1, 1, "shorthand for DIV align=center " },
{ "CITE", 0, 0, 0, 0, 0, "citation" },
{ "CODE", 0, 0, 0, 0, 0, "computer code fragment" },
{ "COL", 0, 2, 1, 0, 0, "table column " },
{ "COLGROUP", 0, 1, 0, 0, 0, "table column group " },
{ "DD", 0, 1, 0, 0, 0, "definition description " },
{ "DEL", 0, 0, 0, 0, 0, "deleted text " },
{ "DFN", 0, 0, 0, 0, 0, "instance definition" },
{ "DIR", 0, 0, 0, 1, 1, "directory list" },
{ "DIV", 0, 0, 0, 0, 0, "generic language/style container"},
{ "DL", 0, 0, 0, 0, 0, "definition list " },
{ "DT", 0, 1, 0, 0, 0, "definition term " },
{ "EM", 0, 0, 0, 0, 0, "emphasis" },
{ "FIELDSET", 0, 0, 0, 0, 0, "form control group " },
{ "FONT", 0, 0, 0, 1, 1, "local change to font " },
{ "FORM", 0, 0, 0, 0, 0, "interactive form " },
{ "FRAME", 0, 2, 1, 0, 2, "subwindow " },
{ "FRAMESET", 0, 0, 0, 0, 2, "window subdivision" },
{ "H1", 0, 0, 0, 0, 0, "heading " },
{ "H2", 0, 0, 0, 0, 0, "heading " },
{ "H3", 0, 0, 0, 0, 0, "heading " },
{ "H4", 0, 0, 0, 0, 0, "heading " },
{ "H5", 0, 0, 0, 0, 0, "heading " },
{ "H6", 0, 0, 0, 0, 0, "heading " },
{ "HEAD", 1, 1, 0, 0, 0, "document head " },
{ "HR", 0, 2, 1, 0, 0, "horizontal rule " },
{ "HTML", 1, 1, 0, 0, 0, "document root element " },
{ "I", 0, 0, 0, 0, 0, "italic text style" },
{ "IFRAME", 0, 0, 0, 0, 1, "inline subwindow " },
{ "IMG", 0, 2, 1, 0, 0, "Embedded image " },
{ "INPUT", 0, 2, 1, 0, 0, "form control " },
{ "INS", 0, 0, 0, 0, 0, "inserted text" },
{ "ISINDEX", 0, 2, 1, 1, 1, "single line prompt " },
{ "KBD", 0, 0, 0, 0, 0, "text to be entered by the user" },
{ "LABEL", 0, 0, 0, 0, 0, "form field label text " },
{ "LEGEND", 0, 0, 0, 0, 0, "fieldset legend " },
{ "LI", 0, 1, 0, 0, 0, "list item " },
{ "LINK", 0, 2, 1, 0, 0, "a media-independent link " },
{ "MAP", 0, 0, 0, 0, 0, "client-side image map " },
{ "MENU", 0, 0, 0, 1, 1, "menu list " },
{ "META", 0, 2, 1, 0, 0, "generic metainformation " },
{ "NOFRAMES", 0, 0, 0, 0, 2, "alternate content container for non frame-based rendering " },
{ "NOSCRIPT", 0, 0, 0, 0, 0, "alternate content container for non script-based rendering " },
{ "OBJECT", 0, 0, 0, 0, 0, "generic embedded object " },
{ "OL", 0, 0, 0, 0, 0, "ordered list " },
{ "OPTGROUP", 0, 0, 0, 0, 0, "option group " },
{ "OPTION", 0, 1, 0, 0, 0, "selectable choice " },
{ "P", 0, 1, 0, 0, 0, "paragraph " },
{ "PARAM", 0, 2, 1, 0, 0, "named property value " },
{ "PRE", 0, 0, 0, 0, 0, "preformatted text " },
{ "Q", 0, 0, 0, 0, 0, "short inline quotation " },
{ "S", 0, 0, 0, 1, 1, "strike-through text style" },
{ "SAMP", 0, 0, 0, 0, 0, "sample program output, scripts, etc." },
{ "SCRIPT", 0, 0, 0, 0, 0, "script statements " },
{ "SELECT", 0, 0, 0, 0, 0, "option selector " },
{ "SMALL", 0, 0, 0, 0, 0, "small text style" },
{ "SPAN", 0, 0, 0, 0, 0, "generic language/style container " },
{ "STRIKE", 0, 0, 0, 1, 1, "strike-through text" },
{ "STRONG", 0, 0, 0, 0, 0, "strong emphasis" },
{ "STYLE", 0, 0, 0, 0, 0, "style info " },
{ "SUB", 0, 0, 0, 0, 0, "subscript" },
{ "SUP", 0, 0, 0, 0, 0, "superscript " },
{ "TABLE", 0, 0, 0, 0, 0, "&#160;" },
{ "TBODY", 1, 1, 0, 0, 0, "table body " },
{ "TD", 0, 1, 0, 0, 0, "table data cell" },
{ "TEXTAREA", 0, 0, 0, 0, 0, "multi-line text field " },
{ "TFOOT", 0, 1, 0, 0, 0, "table footer " },
{ "TH", 0, 1, 0, 0, 0, "table header cell" },
{ "THEAD", 0, 1, 0, 0, 0, "table header " },
{ "TITLE", 0, 0, 0, 0, 0, "document title " },
{ "TR", 0, 1, 0, 0, 0, "table row " },
{ "TT", 0, 0, 0, 0, 0, "teletype or monospaced text style" },
{ "U", 0, 0, 0, 1, 1, "underlined text style" },
{ "UL", 0, 0, 0, 0, 0, "unordered list " },
{ "VAR", 0, 0, 0, 0, 0, "instance of a variable or program argument" },
};
/*
* start tags that imply the end of a current element
* any tag of each line implies the end of the current element if the type of
* that element is in the same line
*/
CHAR *htmlEquEnd[] = {
"DT", "DD", "LI", "OPTION", NULL,
"H1", "H2", "H3", "H4", "H5", "H6", NULL,
"OL", "MENU", "DIR", "ADDRESS", "PRE", "LISTING", "XMP", NULL,
NULL
};
/*
* acording the HTML DTD, HR should be added to the 2nd line above, as it
* is not allowed within a H1, H2, H3, etc. But we should tolerate that case
* because many documents contain rules in headings...
*/
/*
* start tags that imply the end of current element
*/
CHAR *htmlStartClose[] = {
"FORM", "FORM", "P", "HR", "H1", "H2", "H3", "H4", "H5", "H6",
"DL", "UL", "OL", "MENU", "DIR", "ADDRESS", "PRE",
"LISTING", "XMP", "HEAD", NULL,
"HEAD", "P", NULL,
"TITLE", "P", NULL,
"BODY", "HEAD", "STYLE", "LINK", "TITLE", "P", NULL,
"LI", "P", "H1", "H2", "H3", "H4", "H5", "H6", "DL", "ADDRESS",
"PRE", "LISTING", "XMP", "HEAD", NULL,
"HR", "P", "HEAD", NULL,
"H1", "P", "HEAD", NULL,
"H2", "P", "HEAD", NULL,
"H3", "P", "HEAD", NULL,
"H4", "P", "HEAD", NULL,
"H5", "P", "HEAD", NULL,
"H6", "P", "HEAD", NULL,
"DIR", "P", "HEAD", NULL,
"ADDRESS", "P", "HEAD", "UL", NULL,
"PRE", "P", "HEAD", "UL", NULL,
"LISTING", "P", "HEAD", NULL,
"XMP", "P", "HEAD", NULL,
"BLOCKQUOTE", "P", "HEAD", NULL,
"DL", "P", "DT", "MENU", "DIR", "ADDRESS", "PRE", "LISTING",
"XMP", "HEAD", NULL,
"DT", "P", "MENU", "DIR", "ADDRESS", "PRE", "LISTING", "XMP", "HEAD", NULL,
"DD", "P", "MENU", "DIR", "ADDRESS", "PRE", "LISTING", "XMP", "HEAD", NULL,
"UL", "P", "HEAD", "OL", "MENU", "DIR", "ADDRESS", "PRE",
"LISTING", "XMP", NULL,
"OL", "P", "HEAD", "UL", NULL,
"MENU", "P", "HEAD", "UL", NULL,
"P", "P", "HEAD", "H1", "H2", "H3", "H4", "H5", "H6", NULL,
"DIV", "P", "HEAD", NULL,
"NOSCRIPT", "P", "HEAD", NULL,
"CENTER", "FONT", "B", "I", "P", "HEAD", NULL,
"A", "A", NULL,
"CAPTION", "P", NULL,
"COLGROUP", "CAPTION", "COLGROUP", "COL", "P", NULL,
"COL", "CAPTION", "COL", "P", NULL,
"TABLE", "P", "HEAD", "H1", "H2", "H3", "H4", "H5", "H6", "PRE",
"LISTING", "XMP", "A", NULL,
"TH", "TH", "TD", NULL,
"TD", "TH", "TD", NULL,
"TR", "TH", "TD", "TR", "CAPTION", "COL", "COLGROUP", NULL,
"THEAD", "CAPTION", "COL", "COLGROUP", NULL,
"TFOOT", "TH", "TD", "TR", "CAPTION", "COL", "COLGROUP", "THEAD",
"TBODY", NULL,
"TBODY", "TH", "TD", "TR", "CAPTION", "COL", "COLGROUP", "THEAD",
"TFOOT", "TBODY", NULL,
"OPTGROUP", "OPTION", NULL,
"FIELDSET", "LEGEND", "P", "HEAD", "H1", "H2", "H3", "H4", "H5", "H6",
"PRE", "LISTING", "XMP", "A", NULL,
NULL
};
static CHAR** htmlStartCloseIndex[100];
static int htmlStartCloseIndexinitialized = 0;
/************************************************************************
* *
* functions to handle HTML specific data *
* *
************************************************************************/
/**
* htmlInitAutoClose:
*
* Initialize the htmlStartCloseIndex for fast lookup of closing tags names.
*
*/
void
htmlInitAutoClose(void) {
int index, i = 0;
if (htmlStartCloseIndexinitialized) return;
for (index = 0;index < 100;index ++) htmlStartCloseIndex[index] = NULL;
index = 0;
while ((htmlStartClose[i] != NULL) && (index < 100 - 1)) {
htmlStartCloseIndex[index++] = &htmlStartClose[i];
while (htmlStartClose[i] != NULL) i++;
i++;
}
}
/**
* htmlTagLookup:
* @tag: The tag name
*
* Lookup the HTML tag in the ElementTable
*
* Returns the related htmlElemDescPtr or NULL if not found.
*/
htmlElemDescPtr
htmlTagLookup(const CHAR *tag) {
int i = 0;
for (i = 0; i < (sizeof(html40ElementTable) /
sizeof(html40ElementTable[0]));i++) {
if (!xmlStrcmp(tag, html40ElementTable[i].name))
return(&html40ElementTable[i]);
}
return(NULL);
}
/**
* htmlCheckAutoClose:
* @new: The new tag name
* @old: The old tag name
*
* Checks wether the new tag is one of the registered valid tags for closing old.
* Initialize the htmlStartCloseIndex for fast lookup of closing tags names.
*
* Returns 0 if no, 1 if yes.
*/
int
htmlCheckAutoClose(const CHAR *new, const CHAR *old) {
int i, index;
CHAR **close;
if (htmlStartCloseIndexinitialized == 0) htmlInitAutoClose();
/* inefficient, but not a big deal */
for (index = 0; index < 100;index++) {
close = htmlStartCloseIndex[index];
if (close == NULL) return(0);
if (!xmlStrcmp(*close, new)) break;
}
i = close - htmlStartClose;
i++;
while (htmlStartClose[i] != NULL) {
if (!xmlStrcmp(htmlStartClose[i], old)) {
#ifdef DEBUG
printf("htmlCheckAutoClose: %s closes %s\n", new, old);
#endif
return(1);
}
i++;
}
return(0);
}
/**
* htmlAutoClose:
* @ctxt: an HTML parser context
* @new: The new tag name
*
* The HTmL DtD allows a tag to implicitely close other tags.
* The list is kept in htmlStartClose array. This function is
* called when a new tag has been detected and generates the
* appropriates closes if possible/needed.
*/
void
htmlAutoClose(htmlParserCtxtPtr ctxt, const CHAR *new) {
const CHAR *old;
while ((ctxt->node != NULL) &&
(htmlCheckAutoClose(new, ctxt->node->name))) {
if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL))
ctxt->sax->endElement(ctxt->userData, ctxt->node->name);
}
}
/************************************************************************
* *
* Parser stacks related functions and macros *
* *
************************************************************************/
/*
* Generic function for accessing stacks in the Parser Context
*/
#define PUSH_AND_POP(type, name) \
int html##name##Push(htmlParserCtxtPtr ctxt, type value) { \
if (ctxt->name##Nr >= ctxt->name##Max) { \
ctxt->name##Max *= 2; \
ctxt->name##Tab = (void *) realloc(ctxt->name##Tab, \
ctxt->name##Max * sizeof(ctxt->name##Tab[0])); \
if (ctxt->name##Tab == NULL) { \
fprintf(stderr, "realloc failed !\n"); \
exit(1); \
} \
} \
ctxt->name##Tab[ctxt->name##Nr] = value; \
ctxt->name = value; \
return(ctxt->name##Nr++); \
} \
type html##name##Pop(htmlParserCtxtPtr ctxt) { \
type ret; \
if (ctxt->name##Nr <= 0) return(0); \
ctxt->name##Nr--; \
if (ctxt->name##Nr > 0) \
ctxt->name = ctxt->name##Tab[ctxt->name##Nr - 1]; \
else \
ctxt->name = NULL; \
ret = ctxt->name##Tab[ctxt->name##Nr]; \
ctxt->name##Tab[ctxt->name##Nr] = 0; \
return(ret); \
} \
PUSH_AND_POP(xmlNodePtr, node)
/*
* Macros for accessing the content. Those should be used only by the parser,
* and not exported.
*
* Dirty macros, i.e. one need to make assumption on the context to use them
*
* CUR_PTR return the current pointer to the CHAR to be parsed.
* CUR returns the current CHAR value, i.e. a 8 bit value if compiled
* in ISO-Latin or UTF-8, and the current 16 bit value if compiled
* in UNICODE mode. This should be used internally by the parser
* only to compare to ASCII values otherwise it would break when
* running with UTF-8 encoding.
* NXT(n) returns the n'th next CHAR. Same as CUR is should be used only
* to compare on ASCII based substring.
* SKIP(n) Skip n CHAR, and must also be used only to skip ASCII defined
* strings within the parser.
*
* Clean macros, not dependent of an ASCII context, expect UTF-8 encoding
*
* CURRENT Returns the current char value, with the full decoding of
* UTF-8 if we are using this mode. It returns an int.
* NEXT Skip to the next character, this does the proper decoding
* in UTF-8 mode. It also pop-up unfinished entities on the fly.
* It returns the pointer to the current CHAR.
* COPY(to) copy one char to *to, increment CUR_PTR and to accordingly
*/
#define CUR (*ctxt->input->cur)
#define SKIP(val) ctxt->input->cur += (val)
#define NXT(val) ctxt->input->cur[(val)]
#define CUR_PTR ctxt->input->cur
#define SKIP_BLANKS \
while (IS_BLANK(*(ctxt->input->cur))) NEXT
#ifndef USE_UTF_8
#define CURRENT (*ctxt->input->cur)
#define NEXT ((*ctxt->input->cur) ? \
(((*(ctxt->input->cur) == '\n') ? \
(ctxt->input->line++, ctxt->input->col = 1) : \
(ctxt->input->col++)), ctxt->input->cur++) : \
(ctxt->input->cur))
#else
#endif
/************************************************************************
* *
* Commodity functions to handle entities *
* *
************************************************************************/
/*
* Macro used to grow the current buffer.
*/
#define growBuffer(buffer) { \
buffer##_size *= 2; \
buffer = (CHAR *) realloc(buffer, buffer##_size * sizeof(CHAR)); \
if (buffer == NULL) { \
perror("realloc failed"); \
exit(1); \
} \
}
/**
* htmlDecodeEntities:
* @ctxt: the parser context
* @len: the len to decode (in bytes !), -1 for no size limit
* @end: an end marker CHAR, 0 if none
* @end2: an end marker CHAR, 0 if none
* @end3: an end marker CHAR, 0 if none
*
* Subtitute the HTML entitis by their value
*
* Returns A newly allocated string with the substitution done. The caller
* must deallocate it !
*/
CHAR *
htmlDecodeEntities(htmlParserCtxtPtr ctxt, int len,
CHAR end, CHAR end2, CHAR end3) {
CHAR *buffer = NULL;
int buffer_size = 0;
CHAR *out = NULL;
CHAR *cur = NULL;
xmlEntityPtr ent;
const CHAR *start = CUR_PTR;
unsigned int max = (unsigned int) len;
/*
* allocate a translation buffer.
*/
buffer_size = 1000;
buffer = (CHAR *) malloc(buffer_size * sizeof(CHAR));
if (buffer == NULL) {
perror("xmlDecodeEntities: malloc failed");
return(NULL);
}
out = buffer;
/*
* Ok loop until we reach one of the ending char or a size limit.
*/
while ((CUR_PTR - start < max) && (CUR != end) &&
(CUR != end2) && (CUR != end3)) {
if (CUR == '&') {
if (NXT(1) == '#') {
int val = htmlParseCharRef(ctxt);
/* TODO: invalid for UTF-8 variable encoding !!! */
*out++ = val;
} else {
ent = htmlParseEntityRef(ctxt);
if (ent != NULL) {
cur = ent->content;
while (*cur != 0) {
*out++ = *cur++;
if (out - buffer > buffer_size - 100) {
int index = out - buffer;
growBuffer(buffer);
out = &buffer[index];
}
}
}
}
} else {
/* TODO: invalid for UTF-8 , use COPY(out); */
*out++ = CUR;
if (out - buffer > buffer_size - 100) {
int index = out - buffer;
growBuffer(buffer);
out = &buffer[index];
}
NEXT;
}
}
*out++ = 0;
return(buffer);
}
/************************************************************************
* *
* Commodity functions to handle encodings *
* *
************************************************************************/
/**
* htmlSwitchEncoding:
* @ctxt: the parser context
* @len: the len of @cur
*
* change the input functions when discovering the character encoding
* of a given entity.
*
*/
void
htmlSwitchEncoding(htmlParserCtxtPtr ctxt, xmlCharEncoding enc)
{
switch (enc) {
case XML_CHAR_ENCODING_ERROR:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "encoding unknown\n");
ctxt->wellFormed = 0;
break;
case XML_CHAR_ENCODING_NONE:
/* let's assume it's UTF-8 without the XML decl */
return;
case XML_CHAR_ENCODING_UTF8:
/* default encoding, no conversion should be needed */
return;
case XML_CHAR_ENCODING_UTF16LE:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding UTF16 little endian not supported\n");
break;
case XML_CHAR_ENCODING_UTF16BE:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding UTF16 big endian not supported\n");
break;
case XML_CHAR_ENCODING_UCS4LE:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding USC4 little endian not supported\n");
break;
case XML_CHAR_ENCODING_UCS4BE:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding USC4 big endian not supported\n");
break;
case XML_CHAR_ENCODING_EBCDIC:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding EBCDIC not supported\n");
break;
case XML_CHAR_ENCODING_UCS4_2143:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding UCS4 2143 not supported\n");
break;
case XML_CHAR_ENCODING_UCS4_3412:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding UCS4 3412 not supported\n");
break;
case XML_CHAR_ENCODING_UCS2:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding UCS2 not supported\n");
break;
case XML_CHAR_ENCODING_8859_1:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding ISO_8859_1 ISO Latin 1 not supported\n");
break;
case XML_CHAR_ENCODING_8859_2:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding ISO_8859_2 ISO Latin 2 not supported\n");
break;
case XML_CHAR_ENCODING_8859_3:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding ISO_8859_3 not supported\n");
break;
case XML_CHAR_ENCODING_8859_4:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding ISO_8859_4 not supported\n");
break;
case XML_CHAR_ENCODING_8859_5:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding ISO_8859_5 not supported\n");
break;
case XML_CHAR_ENCODING_8859_6:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding ISO_8859_6 not supported\n");
break;
case XML_CHAR_ENCODING_8859_7:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding ISO_8859_7 not supported\n");
break;
case XML_CHAR_ENCODING_8859_8:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding ISO_8859_8 not supported\n");
break;
case XML_CHAR_ENCODING_8859_9:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding ISO_8859_9 not supported\n");
break;
case XML_CHAR_ENCODING_2022_JP:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding ISO-2022-JPnot supported\n");
break;
case XML_CHAR_ENCODING_SHIFT_JIS:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding Shift_JISnot supported\n");
break;
case XML_CHAR_ENCODING_EUC_JP:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding EUC-JPnot supported\n");
break;
}
}
/************************************************************************
* *
* Commodity functions, cleanup needed ? *
* *
************************************************************************/
/**
* areBlanks:
* @ctxt: an HTML parser context
* @str: a CHAR *
* @len: the size of @str
*
* Is this a sequence of blank chars that one can ignore ?
*
* TODO: to be corrected accodingly to DTD information if available
*
* Returns 1 if ignorable 0 otherwise.
*/
static int areBlanks(htmlParserCtxtPtr ctxt, const CHAR *str, int len) {
int i;
xmlNodePtr lastChild;
for (i = 0;i < len;i++)
if (!(IS_BLANK(str[i]))) return(0);
if (CUR != '<') return(0);
if (ctxt->node == NULL) return(0);
lastChild = xmlGetLastChild(ctxt->node);
if (lastChild == NULL) {
if (ctxt->node->content != NULL) return(0);
} else if (xmlNodeIsText(lastChild))
return(0);
return(1);
}
/**
* htmlHandleEntity:
* @ctxt: an HTML parser context
* @entity: an XML entity pointer.
*
* Default handling of an HTML entity, call the parser with the
* substitution string
*/
void
htmlHandleEntity(htmlParserCtxtPtr ctxt, xmlEntityPtr entity) {
int len;
if (entity->content == NULL) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "htmlHandleEntity %s: content == NULL\n",
entity->name);
ctxt->wellFormed = 0;
return;
}
len = xmlStrlen(entity->content);
/*
* Just handle the content as a set of chars.
*/
if ((ctxt->sax != NULL) && (ctxt->sax->characters != NULL))
ctxt->sax->characters(ctxt->userData, entity->content, len);
}
/**
* htmlNewDoc:
* @URI: URI for the dtd, or NULL
* @ExternalID: the external ID of the DTD, or NULL
*
* Returns a new document
*/
htmlDocPtr
htmlNewDoc(const CHAR *URI, const CHAR *ExternalID) {
xmlDocPtr cur;
/*
* Allocate a new document and fill the fields.
*/
cur = (xmlDocPtr) malloc(sizeof(xmlDoc));
if (cur == NULL) {
fprintf(stderr, "xmlNewDoc : malloc failed\n");
return(NULL);
}
cur->type = XML_DOCUMENT_NODE;
cur->version = NULL;
if (ExternalID != NULL) cur->ID = xmlStrdup(ExternalID);
else cur->ID = NULL;
if (URI != NULL) cur->DTD = xmlStrdup(URI);
else cur->DTD = NULL;
cur->name = NULL;
cur->root = NULL;
cur->intSubset = NULL;
cur->extSubset = NULL;
cur->oldNs = NULL;
cur->encoding = NULL;
cur->standalone = 1;
cur->compression = 0;
#ifndef XML_WITHOUT_CORBA
cur->_private = NULL;
cur->vepv = NULL;
#endif
return(cur);
}
/************************************************************************
* *
* The parser itself *
* Relates to http://www.w3.org/TR/html40 *
* *
************************************************************************/
/************************************************************************
* *
* The parser itself *
* *
************************************************************************/
/**
* htmlParseHTMLName:
* @ctxt: an HTML parser context
*
* parse an HTML tag or attribute name, note that we convert it to uppercase
* since HTML names are not case-sensitive.
*
* Returns the Tag Name parsed or NULL
*/
CHAR *
htmlParseHTMLName(htmlParserCtxtPtr ctxt) {
CHAR *ret = NULL;
int i = 0;
CHAR loc[100];
if (!IS_LETTER(CUR) && (CUR != '_') &&
(CUR != ':')) return(NULL);
while ((i < 100) && ((IS_LETTER(CUR)) || (IS_DIGIT(CUR)))) {
if ((CUR >= 0x61) && (CUR <= 0x7a)) loc[i] = CUR - 0x20;
else loc[i] = CUR;
i++;
NEXT;
}
ret = xmlStrndup(loc, i);
return(ret);
}
/**
* htmlParseName:
* @ctxt: an HTML parser context
*
* parse an HTML name, this routine is case sensistive.
*
* Returns the Name parsed or NULL
*/
CHAR *
htmlParseName(htmlParserCtxtPtr ctxt) {
const CHAR *q;
CHAR *ret = NULL;
if (!IS_LETTER(CUR) && (CUR != '_') &&
(CUR != ':')) return(NULL);
q = NEXT;
while ((IS_LETTER(CUR)) || (IS_DIGIT(CUR)) ||
(CUR == '.') || (CUR == '-') ||
(CUR == '_') || (CUR == ':') ||
(IS_COMBINING(CUR)) ||
(IS_EXTENDER(CUR)))
NEXT;
ret = xmlStrndup(q, CUR_PTR - q);
return(ret);
}
/**
* htmlParseNmtoken:
* @ctxt: an HTML parser context
*
* parse an HTML Nmtoken.
*
* Returns the Nmtoken parsed or NULL
*/
CHAR *
htmlParseNmtoken(htmlParserCtxtPtr ctxt) {
const CHAR *q;
CHAR *ret = NULL;
q = NEXT;
while ((IS_LETTER(CUR)) || (IS_DIGIT(CUR)) ||
(CUR == '.') || (CUR == '-') ||
(CUR == '_') || (CUR == ':') ||
(IS_COMBINING(CUR)) ||
(IS_EXTENDER(CUR)))
NEXT;
ret = xmlStrndup(q, CUR_PTR - q);
return(ret);
}
/**
* htmlParseEntityRef:
* @ctxt: an HTML parser context
*
* parse ENTITY references declarations
*
* [68] EntityRef ::= '&' Name ';'
*
* Returns the xmlEntityPtr if found, or NULL otherwise.
*/
xmlEntityPtr
htmlParseEntityRef(htmlParserCtxtPtr ctxt) {
const CHAR *q; /* !!!!!!!!!!! Unused !!!!!!!!!! */
CHAR *name;
xmlEntityPtr ent = NULL;
q = CUR_PTR;
if (CUR == '&') {
NEXT;
name = htmlParseName(ctxt);
if (name == NULL) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "htmlParseEntityRef: no name\n");
ctxt->wellFormed = 0;
} else {
if (CUR == ';') {
NEXT;
/*
* Ask first SAX for entity resolution, otherwise try the
* predefined set.
*/
if (ctxt->sax != NULL) {
if (ctxt->sax->getEntity != NULL)
ent = ctxt->sax->getEntity(ctxt->userData, name);
if (ent == NULL)
ent = xmlGetPredefinedEntity(name);
}
/*
* Well Formedness Constraint if:
* - standalone
* or
* - no external subset and no external parameter entities
* referenced
* then
* the entity referenced must have been declared
*
* TODO: to be double checked !!! This is wrong !
*/
if (ent == NULL) {
if (ctxt->sax != NULL) {
if (((ctxt->sax->isStandalone != NULL) &&
ctxt->sax->isStandalone(ctxt->userData) == 1) ||
(((ctxt->sax->hasInternalSubset == NULL) ||
ctxt->sax->hasInternalSubset(ctxt->userData) == 0) &&
((ctxt->sax->hasExternalSubset == NULL) ||
ctxt->sax->hasExternalSubset(ctxt->userData) == 0))) {
if (ctxt->sax->error != NULL)
ctxt->sax->error(ctxt->userData,
"Entity '%s' not defined\n", name);
ctxt->wellFormed = 0;
}
} else {
fprintf(stderr, "Entity '%s' not defined\n", name);
ctxt->wellFormed = 0;
}
}
/*
* Well Formedness Constraint :
* The referenced entity must be a parsed entity.
*/
if (ent != NULL) {
switch (ent->type) {
case XML_INTERNAL_PARAMETER_ENTITY:
case XML_EXTERNAL_PARAMETER_ENTITY:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Attempt to reference the parameter entity '%s'\n", name);
ctxt->wellFormed = 0;
break;
case XML_EXTERNAL_GENERAL_UNPARSED_ENTITY:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Attempt to reference unparsed entity '%s'\n", name);
ctxt->wellFormed = 0;
break;
}
}
/*
* TODO: !!!
* Well Formedness Constraint :
* The referenced entity must not lead to recursion !
*/
} else {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"htmlParseEntityRef: expecting ';'\n");
ctxt->wellFormed = 0;
}
free(name);
}
}
return(ent);
}
/**
* htmlParseAttValue:
* @ctxt: an HTML parser context
*
* parse a value for an attribute
* Note: the parser won't do substitution of entities here, this
* will be handled later in xmlStringGetNodeList, unless it was
* asked for ctxt->replaceEntities != 0
*
* [10] AttValue ::= '"' ([^<&"] | Reference)* '"' |
* "'" ([^<&'] | Reference)* "'"
*
* Returns the AttValue parsed or NULL.
*/
CHAR *
htmlParseAttValue(htmlParserCtxtPtr ctxt) {
CHAR *ret = NULL;
if (CUR == '"') {
NEXT;
if (ctxt->replaceEntities != 0)
ret = xmlDecodeEntities(ctxt, -1, XML_SUBSTITUTE_REF, '"', '<', 0);
else
ret = xmlDecodeEntities(ctxt, -1, XML_SUBSTITUTE_NONE, '"', '<', 0);
if (CUR == '<') {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Unescaped '<' not allowed in attributes values\n");
ctxt->wellFormed = 0;
}
if (CUR != '"') {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "AttValue: ' expected\n");
ctxt->wellFormed = 0;
} else
NEXT;
} else if (CUR == '\'') {
NEXT;
if (ctxt->replaceEntities != 0)
ret = xmlDecodeEntities(ctxt, -1, XML_SUBSTITUTE_REF, '\'', '<', 0);
else
ret = xmlDecodeEntities(ctxt, -1, XML_SUBSTITUTE_NONE, '\'', '<', 0);
if (CUR == '<') {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Unescaped '<' not allowed in attributes values\n");
ctxt->wellFormed = 0;
}
if (CUR != '\'') {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "AttValue: ' expected\n");
ctxt->wellFormed = 0;
} else
NEXT;
} else {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "AttValue: \" or ' expected\n");
ctxt->wellFormed = 0;
}
return(ret);
}
/**
* htmlParseSystemLiteral:
* @ctxt: an HTML parser context
*
* parse an HTML Literal
*
* [11] SystemLiteral ::= ('"' [^"]* '"') | ("'" [^']* "'")
*
* Returns the SystemLiteral parsed or NULL
*/
CHAR *
htmlParseSystemLiteral(htmlParserCtxtPtr ctxt) {
const CHAR *q;
CHAR *ret = NULL;
if (CUR == '"') {
NEXT;
q = CUR_PTR;
while ((IS_CHAR(CUR)) && (CUR != '"'))
NEXT;
if (!IS_CHAR(CUR)) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "Unfinished SystemLiteral\n");
ctxt->wellFormed = 0;
} else {
ret = xmlStrndup(q, CUR_PTR - q);
NEXT;
}
} else if (CUR == '\'') {
NEXT;
q = CUR_PTR;
while ((IS_CHAR(CUR)) && (CUR != '\''))
NEXT;
if (!IS_CHAR(CUR)) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "Unfinished SystemLiteral\n");
ctxt->wellFormed = 0;
} else {
ret = xmlStrndup(q, CUR_PTR - q);
NEXT;
}
} else {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "SystemLiteral \" or ' expected\n");
ctxt->wellFormed = 0;
}
return(ret);
}
/**
* htmlParsePubidLiteral:
* @ctxt: an HTML parser context
*
* parse an HTML public literal
*
* [12] PubidLiteral ::= '"' PubidChar* '"' | "'" (PubidChar - "'")* "'"
*
* Returns the PubidLiteral parsed or NULL.
*/
CHAR *
htmlParsePubidLiteral(htmlParserCtxtPtr ctxt) {
const CHAR *q;
CHAR *ret = NULL;
/*
* Name ::= (Letter | '_') (NameChar)*
*/
if (CUR == '"') {
NEXT;
q = CUR_PTR;
while (IS_PUBIDCHAR(CUR)) NEXT;
if (CUR != '"') {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "Unfinished PubidLiteral\n");
ctxt->wellFormed = 0;
} else {
ret = xmlStrndup(q, CUR_PTR - q);
NEXT;
}
} else if (CUR == '\'') {
NEXT;
q = CUR_PTR;
while ((IS_LETTER(CUR)) && (CUR != '\''))
NEXT;
if (!IS_LETTER(CUR)) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "Unfinished PubidLiteral\n");
ctxt->wellFormed = 0;
} else {
ret = xmlStrndup(q, CUR_PTR - q);
NEXT;
}
} else {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "SystemLiteral \" or ' expected\n");
ctxt->wellFormed = 0;
}
return(ret);
}
/**
* htmlParseCharData:
* @ctxt: an HTML parser context
* @cdata: int indicating whether we are within a CDATA section
*
* parse a CharData section.
* if we are within a CDATA section ']]>' marks an end of section.
*
* [14] CharData ::= [^<&]* - ([^<&]* ']]>' [^<&]*)
*/
void
htmlParseCharData(htmlParserCtxtPtr ctxt, int cdata) {
const CHAR *q;
q = CUR_PTR;
while ((IS_CHAR(CUR)) && (CUR != '<') &&
(CUR != '&')) {
if ((CUR == ']') && (NXT(1) == ']') &&
(NXT(2) == '>')) {
if (cdata) break;
else {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Sequence ']]>' not allowed in content\n");
ctxt->wellFormed = 0;
}
}
NEXT;
}
if (q == CUR_PTR) return;
/*
* Ok the segment [q CUR_PTR] is to be consumed as chars.
*/
if (ctxt->sax != NULL) {
if (areBlanks(ctxt, q, CUR_PTR - q)) {
if (ctxt->sax->ignorableWhitespace != NULL)
ctxt->sax->ignorableWhitespace(ctxt->userData, q, CUR_PTR - q);
} else {
if (ctxt->sax->characters != NULL)
ctxt->sax->characters(ctxt->userData, q, CUR_PTR - q);
}
}
}
/**
* htmlParseExternalID:
* @ctxt: an HTML parser context
* @publicID: a CHAR** receiving PubidLiteral
* @strict: indicate whether we should restrict parsing to only
* production [75], see NOTE below
*
* Parse an External ID or a Public ID
*
* NOTE: Productions [75] and [83] interract badly since [75] can generate
* 'PUBLIC' S PubidLiteral S SystemLiteral
*
* [75] ExternalID ::= 'SYSTEM' S SystemLiteral
* | 'PUBLIC' S PubidLiteral S SystemLiteral
*
* [83] PublicID ::= 'PUBLIC' S PubidLiteral
*
* Returns the function returns SystemLiteral and in the second
* case publicID receives PubidLiteral, is strict is off
* it is possible to return NULL and have publicID set.
*/
CHAR *
htmlParseExternalID(htmlParserCtxtPtr ctxt, CHAR **publicID, int strict) {
CHAR *URI = NULL;
if ((CUR == 'S') && (NXT(1) == 'Y') &&
(NXT(2) == 'S') && (NXT(3) == 'T') &&
(NXT(4) == 'E') && (NXT(5) == 'M')) {
SKIP(6);
if (!IS_BLANK(CUR)) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Space required after 'SYSTEM'\n");
ctxt->wellFormed = 0;
}
SKIP_BLANKS;
URI = htmlParseSystemLiteral(ctxt);
if (URI == NULL) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"htmlParseExternalID: SYSTEM, no URI\n");
ctxt->wellFormed = 0;
}
} else if ((CUR == 'P') && (NXT(1) == 'U') &&
(NXT(2) == 'B') && (NXT(3) == 'L') &&
(NXT(4) == 'I') && (NXT(5) == 'C')) {
SKIP(6);
if (!IS_BLANK(CUR)) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Space required after 'PUBLIC'\n");
ctxt->wellFormed = 0;
}
SKIP_BLANKS;
*publicID = htmlParsePubidLiteral(ctxt);
if (*publicID == NULL) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"htmlParseExternalID: PUBLIC, no Public Identifier\n");
ctxt->wellFormed = 0;
}
if (strict) {
/*
* We don't handle [83] so "S SystemLiteral" is required.
*/
if (!IS_BLANK(CUR)) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Space required after the Public Identifier\n");
ctxt->wellFormed = 0;
}
} else {
/*
* We handle [83] so we return immediately, if
* "S SystemLiteral" is not detected. From a purely parsing
* point of view that's a nice mess.
*/
const CHAR *ptr = CUR_PTR;
if (!IS_BLANK(*ptr)) return(NULL);
while (IS_BLANK(*ptr)) ptr++;
if ((*ptr != '\'') || (*ptr != '"')) return(NULL);
}
SKIP_BLANKS;
URI = htmlParseSystemLiteral(ctxt);
if (URI == NULL) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"htmlParseExternalID: PUBLIC, no URI\n");
ctxt->wellFormed = 0;
}
}
return(URI);
}
/**
* htmlParseComment:
* @ctxt: an HTML parser context
* @create: should we create a node, or just skip the content
*
* Parse an XML (SGML) comment <!-- .... -->
*
* [15] Comment ::= '<!--' ((Char - '-') | ('-' (Char - '-')))* '-->'
*/
void
htmlParseComment(htmlParserCtxtPtr ctxt, int create) {
const CHAR *q, *start;
const CHAR *r;
CHAR *val;
/*
* Check that there is a comment right here.
*/
if ((CUR != '<') || (NXT(1) != '!') ||
(NXT(2) != '-') || (NXT(3) != '-')) return;
SKIP(4);
start = q = CUR_PTR;
NEXT;
r = CUR_PTR;
NEXT;
while (IS_CHAR(CUR) &&
((CUR == ':') || (CUR != '>') ||
(*r != '-') || (*q != '-'))) {
if ((*r == '-') && (*q == '-')) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Comment must not contain '--' (double-hyphen)`\n");
ctxt->wellFormed = 0;
}
NEXT;r++;q++;
}
if (!IS_CHAR(CUR)) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "Comment not terminated \n<!--%.50s\n", start);
ctxt->wellFormed = 0;
} else {
NEXT;
if (create) {
val = xmlStrndup(start, q - start);
if ((ctxt->sax != NULL) && (ctxt->sax->comment != NULL))
ctxt->sax->comment(ctxt->userData, val);
free(val);
}
}
}
/**
* htmlParseCharRef:
* @ctxt: an HTML parser context
*
* parse Reference declarations
*
* [66] CharRef ::= '&#' [0-9]+ ';' |
* '&#x' [0-9a-fA-F]+ ';'
*
* Returns the value parsed (as an int)
*/
int
htmlParseCharRef(htmlParserCtxtPtr ctxt) {
int val = 0;
if ((CUR == '&') && (NXT(1) == '#') &&
(NXT(2) == 'x')) {
SKIP(3);
while (CUR != ';') {
if ((CUR >= '0') && (CUR <= '9'))
val = val * 16 + (CUR - '0');
else if ((CUR >= 'a') && (CUR <= 'f'))
val = val * 16 + (CUR - 'a') + 10;
else if ((CUR >= 'A') && (CUR <= 'F'))
val = val * 16 + (CUR - 'A') + 10;
else {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"htmlParseCharRef: invalid hexadecimal value\n");
ctxt->wellFormed = 0;
val = 0;
break;
}
NEXT;
}
if (CUR == ';')
NEXT;
} else if ((CUR == '&') && (NXT(1) == '#')) {
SKIP(2);
while (CUR != ';') {
if ((CUR >= '0') && (CUR <= '9'))
val = val * 10 + (CUR - '0');
else {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"htmlParseCharRef: invalid decimal value\n");
ctxt->wellFormed = 0;
val = 0;
break;
}
NEXT;
}
if (CUR == ';')
NEXT;
} else {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "htmlParseCharRef: invalid value\n");
ctxt->wellFormed = 0;
}
/*
* Check the value IS_CHAR ...
*/
if (IS_CHAR(val)) {
return(val);
} else {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "htmlParseCharRef: invalid CHAR value %d\n",
val);
ctxt->wellFormed = 0;
}
return(0);
}
/**
* htmlParseDocTypeDecl :
* @ctxt: an HTML parser context
*
* parse a DOCTYPE declaration
*
* [28] doctypedecl ::= '<!DOCTYPE' S Name (S ExternalID)? S?
* ('[' (markupdecl | PEReference | S)* ']' S?)? '>'
*/
void
htmlParseDocTypeDecl(htmlParserCtxtPtr ctxt) {
CHAR *name;
CHAR *ExternalID = NULL;
CHAR *URI = NULL;
/*
* We know that '<!DOCTYPE' has been detected.
*/
SKIP(9);
SKIP_BLANKS;
/*
* Parse the DOCTYPE name.
*/
name = htmlParseName(ctxt);
if (name == NULL) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "htmlParseDocTypeDecl : no DOCTYPE name !\n");
ctxt->wellFormed = 0;
}
SKIP_BLANKS;
/*
* Check for SystemID and ExternalID
*/
URI = htmlParseExternalID(ctxt, &ExternalID, 1);
SKIP_BLANKS;
/*
* We should be at the end of the DOCTYPE declaration.
*/
if (CUR != '>') {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "DOCTYPE unproperly terminated\n");
ctxt->wellFormed = 0;
/* We shouldn't try to resynchronize ... */
} else {
}
NEXT;
/*
* Cleanup, since we don't use all those identifiers
* TODO : the DOCTYPE if available should be stored !
*/
if (URI != NULL) free(URI);
if (ExternalID != NULL) free(ExternalID);
if (name != NULL) free(name);
}
/**
* htmlParseAttribute:
* @ctxt: an HTML parser context
* @value: a CHAR ** used to store the value of the attribute
*
* parse an attribute
*
* [41] Attribute ::= Name Eq AttValue
*
* [25] Eq ::= S? '=' S?
*
* With namespace:
*
* [NS 11] Attribute ::= QName Eq AttValue
*
* Also the case QName == xmlns:??? is handled independently as a namespace
* definition.
*
* Returns the attribute name, and the value in *value.
*/
CHAR *
htmlParseAttribute(htmlParserCtxtPtr ctxt, CHAR **value) {
CHAR *name, *val;
*value = NULL;
name = htmlParseName(ctxt);
if (name == NULL) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "error parsing attribute name\n");
ctxt->wellFormed = 0;
return(NULL);
}
/*
* read the value
*/
SKIP_BLANKS;
if (CUR == '=') {
NEXT;
SKIP_BLANKS;
val = htmlParseAttValue(ctxt);
} else {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Specification mandate value for attribute %s\n", name);
ctxt->wellFormed = 0;
return(NULL);
}
*value = val;
return(name);
}
/**
* htmlParseStartTag:
* @ctxt: an HTML parser context
*
* parse a start of tag either for rule element or
* EmptyElement. In both case we don't parse the tag closing chars.
*
* [40] STag ::= '<' Name (S Attribute)* S? '>'
*
* [44] EmptyElemTag ::= '<' Name (S Attribute)* S? '/>'
*
* With namespace:
*
* [NS 8] STag ::= '<' QName (S Attribute)* S? '>'
*
* [NS 10] EmptyElement ::= '<' QName (S Attribute)* S? '/>'
*
* Returns the element name parsed
*/
CHAR *
htmlParseStartTag(htmlParserCtxtPtr ctxt) {
CHAR *name;
CHAR *attname;
CHAR *attvalue;
const CHAR **atts = NULL;
int nbatts = 0;
int maxatts = 0;
int i;
if (CUR != '<') return(NULL);
NEXT;
name = htmlParseHTMLName(ctxt);
if (name == NULL) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"htmlParseStartTag: invalid element name\n");
ctxt->wellFormed = 0;
return(NULL);
}
/*
* Check for auto-closure of HTML elements.
*/
htmlAutoClose(ctxt, name);
/*
* Now parse the attributes, it ends up with the ending
*
* (S Attribute)* S?
*/
SKIP_BLANKS;
while ((IS_CHAR(CUR)) &&
(CUR != '>') &&
((CUR != '/') || (NXT(1) != '>'))) {
const CHAR *q = CUR_PTR;
attname = htmlParseAttribute(ctxt, &attvalue);
if ((attname != NULL) && (attvalue != NULL)) {
/*
* Well formedness requires at most one declaration of an attribute
*/
for (i = 0; i < nbatts;i += 2) {
if (!xmlStrcmp(atts[i], attname)) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "Attribute %s redefined\n",
name);
ctxt->wellFormed = 0;
free(attname);
free(attvalue);
break;
}
}
/*
* Add the pair to atts
*/
if (atts == NULL) {
maxatts = 10;
atts = (const CHAR **) malloc(maxatts * sizeof(CHAR *));
if (atts == NULL) {
fprintf(stderr, "malloc of %ld byte failed\n",
maxatts * sizeof(CHAR *));
return(NULL);
}
} else if (nbatts + 2 < maxatts) {
maxatts *= 2;
atts = (const CHAR **) realloc(atts, maxatts * sizeof(CHAR *));
if (atts == NULL) {
fprintf(stderr, "realloc of %ld byte failed\n",
maxatts * sizeof(CHAR *));
return(NULL);
}
}
atts[nbatts++] = attname;
atts[nbatts++] = attvalue;
atts[nbatts] = NULL;
atts[nbatts + 1] = NULL;
}
SKIP_BLANKS;
if (q == CUR_PTR) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"htmlParseStartTag: problem parsing attributes\n");
ctxt->wellFormed = 0;
break;
}
}
/*
* SAX: Start of Element !
*/
if ((ctxt->sax != NULL) && (ctxt->sax->startElement != NULL))
ctxt->sax->startElement(ctxt->userData, name, atts);
if (atts != NULL) {
for (i = 0;i < nbatts;i++) free((CHAR *) atts[i]);
free(atts);
}
return(name);
}
/**
* htmlParseEndTag:
* @ctxt: an HTML parser context
* @tagname: the tag name as parsed in the opening tag.
*
* parse an end of tag
*
* [42] ETag ::= '</' Name S? '>'
*
* With namespace
*
* [NS 9] ETag ::= '</' QName S? '>'
*/
void
htmlParseEndTag(htmlParserCtxtPtr ctxt, CHAR *tagname) {
CHAR *name;
if ((CUR != '<') || (NXT(1) != '/')) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "htmlParseEndTag: '</' not found\n");
ctxt->wellFormed = 0;
return;
}
SKIP(2);
name = htmlParseHTMLName(ctxt);
/*
* We should definitely be at the ending "S? '>'" part
*/
SKIP_BLANKS;
if ((!IS_CHAR(CUR)) || (CUR != '>')) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "End tag : expected '>'\n");
ctxt->wellFormed = 0;
} else
NEXT;
/*
* Well formedness constraints, opening and closing must match.
*/
if (xmlStrcmp(name, tagname)) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Opening and ending tag mismatch: %s and %s\n", tagname, name);
ctxt->wellFormed = 0;
}
/*
* SAX: End of Tag
*/
if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL))
ctxt->sax->endElement(ctxt->userData, name);
if (name != NULL)
free(name);
return;
}
/**
* htmlParseReference:
* @ctxt: an HTML parser context
*
* parse and handle entity references in content,
* this will end-up in a call to character() since this is either a
* CharRef, or a predefined entity.
*/
void
htmlParseReference(htmlParserCtxtPtr ctxt) {
xmlEntityPtr ent;
CHAR *val;
if (CUR != '&') return;
if (NXT(1) == '#') {
CHAR out[2];
int val = htmlParseCharRef(ctxt);
/* TODO: invalid for UTF-8 variable encoding !!! */
out[0] = val;
out[1] = 0;
if ((ctxt->sax != NULL) && (ctxt->sax->characters != NULL))
ctxt->sax->characters(ctxt->userData, out, 1);
} else {
ent = htmlParseEntityRef(ctxt);
if (ent == NULL) return;
if ((ent->name != NULL) &&
(ent->type != XML_INTERNAL_PREDEFINED_ENTITY) &&
(ctxt->sax != NULL) && (ctxt->sax->reference != NULL) &&
(ctxt->replaceEntities == 0)) {
/*
* Create a node.
*/
ctxt->sax->reference(ctxt->userData, ent->name);
return;
}
val = ent->content;
if (val == NULL) return;
/*
* inline the entity.
*/
if ((ctxt->sax != NULL) && (ctxt->sax->characters != NULL))
ctxt->sax->characters(ctxt->userData, val, xmlStrlen(val));
}
}
/**
* htmlParseContent:
* @ctxt: an HTML parser context
*
* Parse a content: comment, sub-element, reference or text.
*
*/
void
htmlParseContent(htmlParserCtxtPtr ctxt) {
while ((CUR != '<') || (NXT(1) != '/')) {
const CHAR *test = CUR_PTR;
/*
* First case : a comment
*/
if ((CUR == '<') && (NXT(1) == '!') &&
(NXT(2) == '-') && (NXT(3) == '-')) {
htmlParseComment(ctxt, 1);
}
/*
* Second case : a sub-element.
*/
else if (CUR == '<') {
htmlParseElement(ctxt);
}
/*
* Third case : a reference. If if has not been resolved,
* parsing returns it's Name, create the node
*/
else if (CUR == '&') {
htmlParseReference(ctxt);
}
/*
* Last case, text. Note that References are handled directly.
*/
else {
htmlParseCharData(ctxt, 0);
}
if (test == CUR_PTR) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"detected an error in element content\n");
ctxt->wellFormed = 0;
break;
}
}
}
/**
* htmlParseElement:
* @ctxt: an HTML parser context
*
* parse an HTML element, this is highly recursive
*
* [39] element ::= EmptyElemTag | STag content ETag
*
* [41] Attribute ::= Name Eq AttValue
*/
void
htmlParseElement(htmlParserCtxtPtr ctxt) {
const CHAR *openTag = CUR_PTR;
CHAR *name;
htmlParserNodeInfo node_info;
htmlNodePtr currentNode;
htmlElemDescPtr info;
/* Capture start position */
node_info.begin_pos = CUR_PTR - ctxt->input->base;
node_info.begin_line = ctxt->input->line;
name = htmlParseStartTag(ctxt);
if (name == NULL) {
return;
}
/*
* Lookup the info for that element.
*/
info = htmlTagLookup(name);
if (info == NULL) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "Tag %s invalid\n",
name);
ctxt->wellFormed = 0;
} else if (info->depr) {
if ((ctxt->sax != NULL) && (ctxt->sax->warning != NULL))
ctxt->sax->warning(ctxt->userData, "Tag %s is deprecated\n",
name);
}
/*
* Check for an Empty Element labelled the XML/SGML way
*/
if ((CUR == '/') && (NXT(1) == '>')) {
SKIP(2);
if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL))
ctxt->sax->endElement(ctxt->userData, name);
free(name);
return;
}
if (CUR == '>') NEXT;
else {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "Couldn't find end of Start Tag\n%.30s\n",
openTag);
ctxt->wellFormed = 0;
/*
* end of parsing of this node.
*/
nodePop(ctxt);
free(name);
return;
}
/*
* Check for an Empty Element from DTD definition
*/
if ((info != NULL) && (info->empty)) {
if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL))
ctxt->sax->endElement(ctxt->userData, name);
free(name);
return;
}
/*
* Parse the content of the element:
*/
currentNode = ctxt->node;
htmlParseContent(ctxt);
/*
* check whether the element get popped due to auto closure
* on start tag
*/
if (currentNode != ctxt->node) {
free(name);
return;
}
if (!IS_CHAR(CUR)) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Premature end of data in tag %.30s\n", openTag);
ctxt->wellFormed = 0;
/*
* end of parsing of this node.
*/
nodePop(ctxt);
free(name);
return;
}
/*
* parse the end of tag: '</' should be here.
*/
htmlParseEndTag(ctxt, name);
free(name);
}
/**
* htmlParseDocument :
* @ctxt: an HTML parser context
*
* parse an HTML document (and build a tree if using the standard SAX
* interface).
*
* Returns 0, -1 in case of error. the parser context is augmented
* as a result of the parsing.
*/
int
htmlParseDocument(htmlParserCtxtPtr ctxt) {
htmlDefaultSAXHandlerInit();
ctxt->html = 1;
/*
* SAX: beginning of the document processing TODO: update for HTML.
*/
if ((ctxt->sax) && (ctxt->sax->setDocumentLocator))
ctxt->sax->setDocumentLocator(ctxt->userData, &xmlDefaultSAXLocator);
/*
* We should check for encoding here and plug-in some
* conversion code TODO !!!!
*/
/*
* Wipe out everything which is before the first '<'
*/
if (IS_BLANK(CUR)) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Extra spaces at the beginning of the document are not allowed\n");
ctxt->wellFormed = 0;
SKIP_BLANKS;
}
if (CUR == 0) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "Document is empty\n");
ctxt->wellFormed = 0;
}
/*
* Then possibly doc type declaration(s) and more Misc
* (doctypedecl Misc*)?
*/
if ((CUR == '<') && (NXT(1) == '!') &&
(NXT(2) == 'D') && (NXT(3) == 'O') &&
(NXT(4) == 'C') && (NXT(5) == 'T') &&
(NXT(6) == 'Y') && (NXT(7) == 'P') &&
(NXT(8) == 'E')) {
htmlParseDocTypeDecl(ctxt);
}
SKIP_BLANKS;
/*
* Create the document if not done already.
*/
if (ctxt->myDoc == NULL) {
ctxt->myDoc = htmlNewDoc(NULL, NULL);
}
/*
* Time to start parsing the tree itself
*/
htmlParseElement(ctxt);
/*
* SAX: end of the document processing.
*/
if ((ctxt->sax) && (ctxt->sax->endDocument != NULL))
ctxt->sax->endDocument(ctxt->userData);
if (! ctxt->wellFormed) return(-1);
return(0);
}
/********************************************************************************
* *
* Parser contexts handling *
* *
********************************************************************************/
/**
* xmlInitParserCtxt:
* @ctxt: an HTML parser context
*
* Initialize a parser context
*/
void
htmlInitParserCtxt(htmlParserCtxtPtr ctxt)
{
htmlSAXHandler *sax;
sax = (htmlSAXHandler *) malloc(sizeof(htmlSAXHandler));
if (sax == NULL) {
fprintf(stderr, "htmlInitParserCtxt: out of memory\n");
}
/* Allocate the Input stack */
ctxt->inputTab = (htmlParserInputPtr *) malloc(5 * sizeof(htmlParserInputPtr));
ctxt->inputNr = 0;
ctxt->inputMax = 5;
ctxt->input = NULL;
ctxt->version = NULL;
ctxt->encoding = NULL;
ctxt->standalone = -1;
/* Allocate the Node stack */
ctxt->nodeTab = (htmlNodePtr *) malloc(10 * sizeof(htmlNodePtr));
ctxt->nodeNr = 0;
ctxt->nodeMax = 10;
ctxt->node = NULL;
if (sax == NULL) ctxt->sax = &htmlDefaultSAXHandler;
else {
ctxt->sax = sax;
memcpy(sax, &htmlDefaultSAXHandler, sizeof(htmlSAXHandler));
}
ctxt->userData = ctxt;
ctxt->myDoc = NULL;
ctxt->wellFormed = 1;
ctxt->replaceEntities = 1;
ctxt->html = 1;
ctxt->record_info = 0;
xmlInitNodeInfoSeq(&ctxt->node_seq);
}
/**
* htmlFreeParserCtxt:
* @ctxt: an HTML parser context
*
* Free all the memory used by a parser context. However the parsed
* document in ctxt->myDoc is not freed.
*/
void
htmlFreeParserCtxt(htmlParserCtxtPtr ctxt)
{
htmlParserInputPtr input;
if (ctxt == NULL) return;
while ((input = inputPop(ctxt)) != NULL) {
xmlFreeInputStream(input);
}
if (ctxt->nodeTab != NULL) free(ctxt->nodeTab);
if (ctxt->inputTab != NULL) free(ctxt->inputTab);
if (ctxt->version != NULL) free((char *) ctxt->version);
if ((ctxt->sax != NULL) && (ctxt->sax != &htmlDefaultSAXHandler))
free(ctxt->sax);
free(ctxt);
}
/**
* htmlCreateDocParserCtxt :
* @cur: a pointer to an array of CHAR
* @encoding: a free form C string describing the HTML document encoding, or NULL
*
* Create a parser context for an HTML document.
*
* Returns the new parser context or NULL
*/
htmlParserCtxtPtr
htmlCreateDocParserCtxt(CHAR *cur, const char *encoding) {
htmlParserCtxtPtr ctxt;
htmlParserInputPtr input;
/* htmlCharEncoding enc; */
ctxt = (htmlParserCtxtPtr) malloc(sizeof(htmlParserCtxt));
if (ctxt == NULL) {
perror("malloc");
return(NULL);
}
htmlInitParserCtxt(ctxt);
input = (htmlParserInputPtr) malloc(sizeof(htmlParserInput));
if (input == NULL) {
perror("malloc");
free(ctxt);
return(NULL);
}
/*
* plug some encoding conversion routines here. !!!
if (encoding != NULL) {
enc = htmlDetectCharEncoding(cur);
htmlSwitchEncoding(ctxt, enc);
}
*/
input->filename = NULL;
input->line = 1;
input->col = 1;
input->base = cur;
input->cur = cur;
input->free = NULL;
inputPush(ctxt, input);
return(ctxt);
}
/********************************************************************************
* *
* User entry points *
* *
********************************************************************************/
/**
* htmlSAXParseDoc :
* @cur: a pointer to an array of CHAR
* @encoding: a free form C string describing the HTML document encoding, or NULL
* @sax: the SAX handler block
* @userData: if using SAX, this pointer will be provided on callbacks.
*
* parse an HTML in-memory document and build a tree.
* It use the given SAX function block to handle the parsing callback.
* If sax is NULL, fallback to the default DOM tree building routines.
*
* Returns the resulting document tree
*/
htmlDocPtr
htmlSAXParseDoc(CHAR *cur, const char *encoding, htmlSAXHandlerPtr sax, void *userData) {
htmlDocPtr ret;
htmlParserCtxtPtr ctxt;
if (cur == NULL) return(NULL);
ctxt = htmlCreateDocParserCtxt(cur, encoding);
if (ctxt == NULL) return(NULL);
if (sax != NULL) {
ctxt->sax = sax;
ctxt->userData = userData;
}
htmlParseDocument(ctxt);
ret = ctxt->myDoc;
if (sax != NULL) {
ctxt->sax = NULL;
ctxt->userData = NULL;
}
htmlFreeParserCtxt(ctxt);
return(ret);
}
/**
* htmlParseDoc :
* @cur: a pointer to an array of CHAR
* @encoding: a free form C string describing the HTML document encoding, or NULL
*
* parse an HTML in-memory document and build a tree.
*
* Returns the resulting document tree
*/
htmlDocPtr
htmlParseDoc(CHAR *cur, const char *encoding) {
return(htmlSAXParseDoc(cur, encoding, NULL, NULL));
}
/**
* htmlCreateFileParserCtxt :
* @filename: the filename
* @encoding: a free form C string describing the HTML document encoding, or NULL
*
* Create a parser context for a file content.
* Automatic support for ZLIB/Compress compressed document is provided
* by default if found at compile-time.
*
* Returns the new parser context or NULL
*/
htmlParserCtxtPtr
htmlCreateFileParserCtxt(const char *filename, const char *encoding)
{
htmlParserCtxtPtr ctxt;
#ifdef HAVE_ZLIB_H
gzFile input;
#else
int input;
#endif
int res;
int len;
struct stat buf;
char *buffer;
htmlParserInputPtr inputStream;
/* htmlCharEncoding enc; */
res = stat(filename, &buf);
if (res < 0) return(NULL);
#ifdef HAVE_ZLIB_H
len = (buf.st_size * 8) + 1000;
retry_bigger:
buffer = malloc(len);
#else
len = buf.st_size + 100;
buffer = malloc(len);
#endif
if (buffer == NULL) {
perror("malloc");
return(NULL);
}
memset(buffer, 0, len);
#ifdef HAVE_ZLIB_H
input = gzopen (filename, "r");
if (input == NULL) {
fprintf (stderr, "Cannot read file %s :\n", filename);
perror ("gzopen failed");
return(NULL);
}
#else
#ifdef WIN32
input = _open (filename, O_RDONLY | _O_BINARY);
#else
input = open (filename, O_RDONLY);
#endif
if (input < 0) {
fprintf (stderr, "Cannot read file %s :\n", filename);
perror ("open failed");
return(NULL);
}
#endif
#ifdef HAVE_ZLIB_H
res = gzread(input, buffer, len);
#else
res = read(input, buffer, buf.st_size);
#endif
if (res < 0) {
fprintf (stderr, "Cannot read file %s :\n", filename);
#ifdef HAVE_ZLIB_H
perror ("gzread failed");
#else
perror ("read failed");
#endif
return(NULL);
}
#ifdef HAVE_ZLIB_H
gzclose(input);
if (res >= len) {
free(buffer);
len *= 2;
goto retry_bigger;
}
buf.st_size = res;
#else
close(input);
#endif
buffer[res] = '\0';
ctxt = (htmlParserCtxtPtr) malloc(sizeof(htmlParserCtxt));
if (ctxt == NULL) {
perror("malloc");
return(NULL);
}
htmlInitParserCtxt(ctxt);
inputStream = (htmlParserInputPtr) malloc(sizeof(htmlParserInput));
if (inputStream == NULL) {
perror("malloc");
free(ctxt);
return(NULL);
}
inputStream->filename = strdup(filename);
inputStream->line = 1;
inputStream->col = 1;
/*
* plug some encoding conversion routines here. !!!
if (encoding != NULL) {
enc = htmlDetectCharEncoding(buffer);
htmlSwitchEncoding(ctxt, enc);
}
*/
inputStream->base = buffer;
inputStream->cur = buffer;
inputStream->free = (xmlParserInputDeallocate) free;
inputPush(ctxt, inputStream);
return(ctxt);
}
/**
* htmlSAXParseFile :
* @filename: the filename
* @encoding: a free form C string describing the HTML document encoding, or NULL
* @sax: the SAX handler block
* @userData: if using SAX, this pointer will be provided on callbacks.
*
* parse an HTML file and build a tree. Automatic support for ZLIB/Compress
* compressed document is provided by default if found at compile-time.
* It use the given SAX function block to handle the parsing callback.
* If sax is NULL, fallback to the default DOM tree building routines.
*
* Returns the resulting document tree
*/
htmlDocPtr
htmlSAXParseFile(const char *filename, const char *encoding, htmlSAXHandlerPtr sax,
void *userData) {
htmlDocPtr ret;
htmlParserCtxtPtr ctxt;
ctxt = htmlCreateFileParserCtxt(filename, encoding);
if (ctxt == NULL) return(NULL);
if (sax != NULL) {
ctxt->sax = sax;
ctxt->userData = userData;
}
htmlParseDocument(ctxt);
ret = ctxt->myDoc;
if (sax != NULL) {
ctxt->sax = NULL;
ctxt->userData = NULL;
}
htmlFreeParserCtxt(ctxt);
return(ret);
}
/**
* htmlParseFile :
* @filename: the filename
* @encoding: a free form C string describing the HTML document encoding, or NULL
*
* parse an HTML file and build a tree. Automatic support for ZLIB/Compress
* compressed document is provided by default if found at compile-time.
*
* Returns the resulting document tree
*/
htmlDocPtr
htmlParseFile(const char *filename, const char *encoding) {
return(htmlSAXParseFile(filename, encoding, NULL, NULL));
}
View Git Blame Copy Permalink