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HTMLparser.c
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Tue Aug 22 22:20:34 2000 UTC (23 years, 9 months ago) by
veillard
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CVS tags:
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Fixed Bug#21552: libxml fails to decode &
uri.c testUri.c patches, by Marc Sanfacon (1 left)
HTML/encoding push problems reported by Wayne Davison
Daniel
/*
* HTMLparser.c : an HTML 4.0 non-verifying parser
*
* See Copyright for the status of this software.
*
* Daniel.Veillard@w3.org
*/
#ifdef WIN32
#include "win32config.h"
#else
#include "config.h"
#endif
#include "xmlversion.h"
#ifdef LIBXML_HTML_ENABLED
#include <stdio.h>
#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 <libxml/xmlmemory.h>
#include <libxml/tree.h>
#include <libxml/HTMLparser.h>
#include <libxml/entities.h>
#include <libxml/encoding.h>
#include <libxml/parser.h>
#include <libxml/valid.h>
#include <libxml/parserInternals.h>
#include <libxml/xmlIO.h>
#include "xml-error.h"
#define HTML_MAX_NAMELEN 1000
#define INPUT_CHUNK 50
#define HTML_PARSER_BIG_BUFFER_SIZE 1000
#define HTML_PARSER_BUFFER_SIZE 100
/* #define DEBUG */
/* #define DEBUG_PUSH */
/************************************************************************
* *
* Parser stacks related functions and macros *
* *
************************************************************************/
/*
* Generic function for accessing stacks in the Parser Context
*/
#define PUSH_AND_POP(scope, type, name) \
scope int html##name##Push(htmlParserCtxtPtr ctxt, type value) { \
if (ctxt->name##Nr >= ctxt->name##Max) { \
ctxt->name##Max *= 2; \
ctxt->name##Tab = (type *) xmlRealloc(ctxt->name##Tab, \
ctxt->name##Max * sizeof(ctxt->name##Tab[0])); \
if (ctxt->name##Tab == NULL) { \
fprintf(stderr, "realloc failed !\n"); \
return(0); \
} \
} \
ctxt->name##Tab[ctxt->name##Nr] = value; \
ctxt->name = value; \
return(ctxt->name##Nr++); \
} \
scope type html##name##Pop(htmlParserCtxtPtr ctxt) { \
type ret; \
if (ctxt->name##Nr < 0) return(0); \
ctxt->name##Nr--; \
if (ctxt->name##Nr < 0) return(0); \
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(extern, xmlNodePtr, node)
PUSH_AND_POP(extern, xmlChar*, name)
/*
* Macros for accessing the content. Those should be used only by the parser,
* and not exported.
*
* Dirty macros, i.e. one need to make assumption on the context to use them
*
* CUR_PTR return the current pointer to the xmlChar to be parsed.
* CUR returns the current xmlChar value, i.e. a 8 bit value 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 xmlChar. Same as CUR is should be used only
* to compare on ASCII based substring.
* UPP(n) returns the n'th next xmlChar converted to uppercase. Same as CUR
* it should be used only to compare on ASCII based substring.
* SKIP(n) Skip n xmlChar, and must also be used only to skip ASCII defined
* strings within the parser.
*
* 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.
* COPY(to) copy one char to *to, increment CUR_PTR and to accordingly
*/
#define UPPER (toupper(*ctxt->input->cur))
#define SKIP(val) ctxt->nbChars += (val),ctxt->input->cur += (val)
#define NXT(val) ctxt->input->cur[(val)]
#define UPP(val) (toupper(ctxt->input->cur[(val)]))
#define CUR_PTR ctxt->input->cur
#define SHRINK xmlParserInputShrink(ctxt->input)
#define GROW xmlParserInputGrow(ctxt->input, INPUT_CHUNK)
#define CURRENT ((int) (*ctxt->input->cur))
#define SKIP_BLANKS htmlSkipBlankChars(ctxt);
#if 0
#define CUR ((int) (*ctxt->input->cur))
#define NEXT htmlNextChar(ctxt);
#else
/* Inported from XML */
/* #define CUR (ctxt->token ? ctxt->token : (int) (*ctxt->input->cur)) */
#define CUR ((int) (*ctxt->input->cur))
#define NEXT xmlNextChar(ctxt);ctxt->nbChars++;
#define RAW (ctxt->token ? -1 : (*ctxt->input->cur))
#define NXT(val) ctxt->input->cur[(val)]
#define CUR_PTR ctxt->input->cur
#define NEXTL(l) \
if (*(ctxt->input->cur) == '\n') { \
ctxt->input->line++; ctxt->input->col = 1; \
} else ctxt->input->col++; \
ctxt->token = 0; ctxt->input->cur += l; ctxt->nbChars++;
/************
\
if (*ctxt->input->cur == '%') xmlParserHandlePEReference(ctxt); \
if (*ctxt->input->cur == '&') xmlParserHandleReference(ctxt);
************/
#define CUR_CHAR(l) htmlCurrentChar(ctxt, &l);
#define CUR_SCHAR(s, l) xmlStringCurrentChar(ctxt, s, &l);
#define COPY_BUF(l,b,i,v) \
if (l == 1) b[i++] = (xmlChar) v; \
else i += xmlCopyChar(l,&b[i],v);
#endif
/**
* htmlCurrentChar:
* @ctxt: the HTML parser context
* @len: pointer to the length of the char read
*
* The current char value, if using UTF-8 this may actaully span multiple
* bytes in the input buffer. Implement the end of line normalization:
* 2.11 End-of-Line Handling
* If the encoding is unspecified, in the case we find an ISO-Latin-1
* char, then the encoding converter is plugged in automatically.
*
* Returns the current char value and its lenght
*/
int
htmlCurrentChar(xmlParserCtxtPtr ctxt, int *len) {
if (ctxt->instate == XML_PARSER_EOF)
return(0);
if (ctxt->token != 0) {
*len = 0;
return(ctxt->token);
}
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;
if (c & 0x80) {
if (cur[1] == 0)
xmlParserInputGrow(ctxt->input, INPUT_CHUNK);
if ((cur[1] & 0xc0) != 0x80)
goto encoding_error;
if ((c & 0xe0) == 0xe0) {
if (cur[2] == 0)
xmlParserInputGrow(ctxt->input, INPUT_CHUNK);
if ((cur[2] & 0xc0) != 0x80)
goto encoding_error;
if ((c & 0xf0) == 0xf0) {
if (cur[3] == 0)
xmlParserInputGrow(ctxt->input, INPUT_CHUNK);
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)) {
if ((ctxt->sax != NULL) &&
(ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Char 0x%X out of allowed range\n", val);
ctxt->errNo = XML_ERR_INVALID_ENCODING;
ctxt->wellFormed = 0;
ctxt->disableSAX = 1;
}
return(val);
} else {
/* 1-byte code */
*len = 1;
return((int) *ctxt->input->cur);
}
}
/*
* Assume it's a fixed lenght encoding (1) with
* a compatibke encoding for the ASCII set, since
* XML constructs only use < 128 chars
*/
*len = 1;
if ((int) *ctxt->input->cur < 0x80)
return((int) *ctxt->input->cur);
/*
* Humm this is bad, do an automatic flow conversion
*/
xmlSwitchEncoding(ctxt, XML_CHAR_ENCODING_8859_1);
ctxt->charset = XML_CHAR_ENCODING_UTF8;
return(xmlCurrentChar(ctxt, len));
encoding_error:
/*
* If we detect an UTF8 error that probably mean that the
* input encoding didn't get properly advertized 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 !)
*/
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL)) {
ctxt->sax->error(ctxt->userData,
"Input is not proper UTF-8, indicate encoding !\n");
ctxt->sax->error(ctxt->userData, "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->errNo = XML_ERR_INVALID_ENCODING;
ctxt->charset = XML_CHAR_ENCODING_8859_1;
*len = 1;
return((int) *ctxt->input->cur);
}
/**
* htmlNextChar:
* @ctxt: the HTML parser context
*
* Skip to the next char input char.
*/
void
htmlNextChar(htmlParserCtxtPtr ctxt) {
if (ctxt->instate == XML_PARSER_EOF)
return;
if ((*ctxt->input->cur == 0) &&
(xmlParserInputGrow(ctxt->input, INPUT_CHUNK) <= 0)) {
xmlPopInput(ctxt);
} else {
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);
}
}
/**
* htmlSkipBlankChars:
* @ctxt: the HTML parser context
*
* skip all blanks character found at that point in the input streams.
*
* Returns the number of space chars skipped
*/
int
htmlSkipBlankChars(xmlParserCtxtPtr ctxt) {
int res = 0;
while (IS_BLANK(*(ctxt->input->cur))) {
if ((*ctxt->input->cur == 0) &&
(xmlParserInputGrow(ctxt->input, INPUT_CHUNK) <= 0)) {
xmlPopInput(ctxt);
} else {
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);
}
res++;
}
return(res);
}
/************************************************************************
* *
* The list of HTML elements and their properties *
* *
************************************************************************/
/*
* Start Tag: 1 means the start tag can be ommited
* End Tag: 1 means the end tag can be ommited
* 2 means it's forbidden (empty elements)
* Depr: this element is deprecated
* DTD: 1 means that this element is valid only in the Loose DTD
* 2 means that this element is valid only in the Frameset DTD
*
* 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, " " },
{ "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", "li", 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", "dd", NULL,
"dd", "p", "menu", "dir", "address", "pre", "listing", "xmp",
"head", "dt", 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", "p", NULL,
"tr", "th", "td", "tr", "caption", "col", "colgroup", "p", NULL,
"thead", "caption", "col", "colgroup", NULL,
"tfoot", "th", "td", "tr", "caption", "col", "colgroup", "thead",
"tbody", "p", NULL,
"tbody", "th", "td", "tr", "caption", "col", "colgroup", "thead",
"tfoot", "tbody", "p", NULL,
"optgroup", "option", NULL,
"fieldset", "legend", "p", "head", "h1", "h2", "h3", "h4", "h5", "h6",
"pre", "listing", "xmp", "a", NULL,
NULL
};
/*
* The list of HTML elements which are supposed not to have
* CDATA content and where a p element will be implied
*
* TODO: extend that list by reading the HTML SGML DtD on
* implied paragraph
*/
static char *htmlNoContentElements[] = {
"html",
"head",
"body",
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 xmlChar *tag) {
int i = 0;
for (i = 0; i < (sizeof(html40ElementTable) /
sizeof(html40ElementTable[0]));i++) {
if (!xmlStrcmp(tag, BAD_CAST html40ElementTable[i].name))
return(&html40ElementTable[i]);
}
return(NULL);
}
/**
* htmlCheckAutoClose:
* @newtag: The new tag name
* @oldtag: 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 xmlChar *newtag, const xmlChar *oldtag) {
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(BAD_CAST *close, newtag)) break;
}
i = close - htmlStartClose;
i++;
while (htmlStartClose[i] != NULL) {
if (!xmlStrcmp(BAD_CAST htmlStartClose[i], oldtag)) {
return(1);
}
i++;
}
return(0);
}
/**
* htmlAutoCloseOnClose:
* @ctxt: an HTML parser context
* @newtag: The new tag name
*
* The HTmL DtD allows an ending tag to implicitely close other tags.
*/
void
htmlAutoCloseOnClose(htmlParserCtxtPtr ctxt, const xmlChar *newtag) {
htmlElemDescPtr info;
xmlChar *oldname;
int i;
#ifdef DEBUG
fprintf(stderr,"Close of %s stack: %d elements\n", newtag, ctxt->nameNr);
for (i = 0;i < ctxt->nameNr;i++)
fprintf(stderr,"%d : %s\n", i, ctxt->nameTab[i]);
#endif
for (i = (ctxt->nameNr - 1);i >= 0;i--) {
if (!xmlStrcmp(newtag, ctxt->nameTab[i])) break;
}
if (i < 0) return;
while (xmlStrcmp(newtag, ctxt->name)) {
info = htmlTagLookup(ctxt->name);
if ((info == NULL) || (info->endTag == 1)) {
#ifdef DEBUG
fprintf(stderr,"htmlAutoCloseOnClose: %s closes %s\n", newtag, ctxt->name);
#endif
} else {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Opening and ending tag mismatch: %s and %s\n",
newtag, ctxt->name);
ctxt->wellFormed = 0;
}
if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL))
ctxt->sax->endElement(ctxt->userData, ctxt->name);
oldname = htmlnamePop(ctxt);
if (oldname != NULL) {
#ifdef DEBUG
fprintf(stderr,"htmlAutoCloseOnClose: popped %s\n", oldname);
#endif
xmlFree(oldname);
}
}
}
/**
* htmlAutoClose:
* @ctxt: an HTML parser context
* @newtag: The new tag name or NULL
*
* 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.
* If newtag is NULL this mean we are at the end of the resource
* and we should check
*/
void
htmlAutoClose(htmlParserCtxtPtr ctxt, const xmlChar *newtag) {
xmlChar *oldname;
while ((newtag != NULL) && (ctxt->name != NULL) &&
(htmlCheckAutoClose(newtag, ctxt->name))) {
#ifdef DEBUG
fprintf(stderr,"htmlAutoClose: %s closes %s\n", newtag, ctxt->name);
#endif
if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL))
ctxt->sax->endElement(ctxt->userData, ctxt->name);
oldname = htmlnamePop(ctxt);
if (oldname != NULL) {
#ifdef DEBUG
fprintf(stderr,"htmlAutoClose: popped %s\n", oldname);
#endif
xmlFree(oldname);
}
}
if (newtag == NULL) {
htmlAutoCloseOnClose(ctxt, BAD_CAST"head");
htmlAutoCloseOnClose(ctxt, BAD_CAST"body");
htmlAutoCloseOnClose(ctxt, BAD_CAST"html");
}
while ((newtag == NULL) && (ctxt->name != NULL) &&
((!xmlStrcmp(ctxt->name, BAD_CAST"head")) ||
(!xmlStrcmp(ctxt->name, BAD_CAST"body")) ||
(!xmlStrcmp(ctxt->name, BAD_CAST"html")))) {
#ifdef DEBUG
fprintf(stderr,"htmlAutoClose: EOF closes %s\n", ctxt->name);
#endif
if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL))
ctxt->sax->endElement(ctxt->userData, ctxt->name);
oldname = htmlnamePop(ctxt);
if (oldname != NULL) {
#ifdef DEBUG
fprintf(stderr,"htmlAutoClose: popped %s\n", oldname);
#endif
xmlFree(oldname);
}
}
}
/**
* htmlAutoCloseTag:
* @doc: the HTML document
* @name: The tag name
* @elem: the HTML element
*
* The HTmL DtD allows a tag to implicitely close other tags.
* The list is kept in htmlStartClose array. This function checks
* if the element or one of it's children would autoclose the
* given tag.
*
* Returns 1 if autoclose, 0 otherwise
*/
int
htmlAutoCloseTag(htmlDocPtr doc, const xmlChar *name, htmlNodePtr elem) {
htmlNodePtr child;
if (elem == NULL) return(1);
if (!xmlStrcmp(name, elem->name)) return(0);
if (htmlCheckAutoClose(elem->name, name)) return(1);
child = elem->children;
while (child != NULL) {
if (htmlAutoCloseTag(doc, name, child)) return(1);
child = child->next;
}
return(0);
}
/**
* htmlIsAutoClosed:
* @doc: the HTML document
* @elem: the HTML element
*
* The HTmL DtD allows a tag to implicitely close other tags.
* The list is kept in htmlStartClose array. This function checks
* if a tag is autoclosed by one of it's child
*
* Returns 1 if autoclosed, 0 otherwise
*/
int
htmlIsAutoClosed(htmlDocPtr doc, htmlNodePtr elem) {
htmlNodePtr child;
if (elem == NULL) return(1);
child = elem->children;
while (child != NULL) {
if (htmlAutoCloseTag(doc, elem->name, child)) return(1);
child = child->next;
}
return(0);
}
/**
* htmlCheckImplied:
* @ctxt: an HTML parser context
* @newtag: The new tag name
*
* The HTmL DtD allows a tag to exists only implicitely
* called when a new tag has been detected and generates the
* appropriates implicit tags if missing
*/
void
htmlCheckImplied(htmlParserCtxtPtr ctxt, const xmlChar *newtag) {
if (!xmlStrcmp(newtag, BAD_CAST"html"))
return;
if (ctxt->nameNr <= 0) {
#ifdef DEBUG
fprintf(stderr,"Implied element html: pushed html\n");
#endif
htmlnamePush(ctxt, xmlStrdup(BAD_CAST"html"));
if ((ctxt->sax != NULL) && (ctxt->sax->startElement != NULL))
ctxt->sax->startElement(ctxt->userData, BAD_CAST"html", NULL);
}
if ((!xmlStrcmp(newtag, BAD_CAST"body")) || (!xmlStrcmp(newtag, BAD_CAST"head")))
return;
if (ctxt->nameNr <= 1) {
if ((!xmlStrcmp(newtag, BAD_CAST"script")) ||
(!xmlStrcmp(newtag, BAD_CAST"style")) ||
(!xmlStrcmp(newtag, BAD_CAST"meta")) ||
(!xmlStrcmp(newtag, BAD_CAST"link")) ||
(!xmlStrcmp(newtag, BAD_CAST"title")) ||
(!xmlStrcmp(newtag, BAD_CAST"base"))) {
/*
* dropped OBJECT ... i you put it first BODY will be
* assumed !
*/
#ifdef DEBUG
fprintf(stderr,"Implied element head: pushed head\n");
#endif
htmlnamePush(ctxt, xmlStrdup(BAD_CAST"head"));
if ((ctxt->sax != NULL) && (ctxt->sax->startElement != NULL))
ctxt->sax->startElement(ctxt->userData, BAD_CAST"head", NULL);
} else {
#ifdef DEBUG
fprintf(stderr,"Implied element body: pushed body\n");
#endif
htmlnamePush(ctxt, xmlStrdup(BAD_CAST"body"));
if ((ctxt->sax != NULL) && (ctxt->sax->startElement != NULL))
ctxt->sax->startElement(ctxt->userData, BAD_CAST"body", NULL);
}
}
}
/**
* htmlCheckParagraph
* @ctxt: an HTML parser context
*
* Check whether a p element need to be implied before inserting
* characters in the current element.
*
* Returns 1 if a paragraph has been inserted, 0 if not and -1
* in case of error.
*/
int
htmlCheckParagraph(htmlParserCtxtPtr ctxt) {
const xmlChar *tag;
int i;
if (ctxt == NULL)
return(-1);
tag = ctxt->name;
if (tag == NULL) {
htmlAutoClose(ctxt, BAD_CAST"p");
htmlCheckImplied(ctxt, BAD_CAST"p");
htmlnamePush(ctxt, xmlStrdup(BAD_CAST"p"));
if ((ctxt->sax != NULL) && (ctxt->sax->startElement != NULL))
ctxt->sax->startElement(ctxt->userData, BAD_CAST"p", NULL);
return(1);
}
for (i = 0; htmlNoContentElements[i] != NULL; i++) {
if (!xmlStrcmp(tag, BAD_CAST htmlNoContentElements[i])) {
#ifdef DEBUG
fprintf(stderr,"Implied element paragraph\n");
#endif
htmlAutoClose(ctxt, BAD_CAST"p");
htmlCheckImplied(ctxt, BAD_CAST"p");
htmlnamePush(ctxt, xmlStrdup(BAD_CAST"p"));
if ((ctxt->sax != NULL) && (ctxt->sax->startElement != NULL))
ctxt->sax->startElement(ctxt->userData, BAD_CAST"p", NULL);
return(1);
}
}
return(0);
}
/************************************************************************
* *
* The list of HTML predefined entities *
* *
************************************************************************/
htmlEntityDesc html40EntitiesTable[] = {
/*
* the 4 absolute ones,
*/
{ 34, "quot", "quotation mark = APL quote, U+0022 ISOnum" },
{ 38, "amp", "ampersand, U+0026 ISOnum" },
{ 60, "lt", "less-than sign, U+003C ISOnum" },
{ 62, "gt", "greater-than sign, U+003E ISOnum" },
/*
* A bunch still in the 128-255 range
* Replacing them depend really on the charset used.
*/
{ 39, "apos", "single quote" },
{ 160, "nbsp", "no-break space = non-breaking space, U+00A0 ISOnum" },
{ 161, "iexcl","inverted exclamation mark, U+00A1 ISOnum" },
{ 162, "cent", "cent sign, U+00A2 ISOnum" },
{ 163, "pound","pound sign, U+00A3 ISOnum" },
{ 164, "curren","currency sign, U+00A4 ISOnum" },
{ 165, "yen", "yen sign = yuan sign, U+00A5 ISOnum" },
{ 166, "brvbar","broken bar = broken vertical bar, U+00A6 ISOnum" },
{ 167, "sect", "section sign, U+00A7 ISOnum" },
{ 168, "uml", "diaeresis = spacing diaeresis, U+00A8 ISOdia" },
{ 169, "copy", "copyright sign, U+00A9 ISOnum" },
{ 170, "ordf", "feminine ordinal indicator, U+00AA ISOnum" },
{ 171, "laquo","left-pointing double angle quotation mark = left pointing guillemet, U+00AB ISOnum" },
{ 172, "not", "not sign, U+00AC ISOnum" },
{ 173, "shy", "soft hyphen = discretionary hyphen, U+00AD ISOnum" },
{ 174, "reg", "registered sign = registered trade mark sign, U+00AE ISOnum" },
{ 175, "macr", "macron = spacing macron = overline = APL overbar, U+00AF ISOdia" },
{ 176, "deg", "degree sign, U+00B0 ISOnum" },
{ 177, "plusmn","plus-minus sign = plus-or-minus sign, U+00B1 ISOnum" },
{ 178, "sup2", "superscript two = superscript digit two = squared, U+00B2 ISOnum" },
{ 179, "sup3", "superscript three = superscript digit three = cubed, U+00B3 ISOnum" },
{ 180, "acute","acute accent = spacing acute, U+00B4 ISOdia" },
{ 181, "micro","micro sign, U+00B5 ISOnum" },
{ 182, "para", "pilcrow sign = paragraph sign, U+00B6 ISOnum" },
{ 183, "middot","middle dot = Georgian comma Greek middle dot, U+00B7 ISOnum" },
{ 184, "cedil","cedilla = spacing cedilla, U+00B8 ISOdia" },
{ 185, "sup1", "superscript one = superscript digit one, U+00B9 ISOnum" },
{ 186, "ordm", "masculine ordinal indicator, U+00BA ISOnum" },
{ 187, "raquo","right-pointing double angle quotation mark right pointing guillemet, U+00BB ISOnum" },
{ 188, "frac14","vulgar fraction one quarter = fraction one quarter, U+00BC ISOnum" },
{ 189, "frac12","vulgar fraction one half = fraction one half, U+00BD ISOnum" },
{ 190, "frac34","vulgar fraction three quarters = fraction three quarters, U+00BE ISOnum" },
{ 191, "iquest","inverted question mark = turned question mark, U+00BF ISOnum" },
{ 192, "Agrave","latin capital letter A with grave = latin capital letter A grave, U+00C0 ISOlat1" },
{ 193, "Aacute","latin capital letter A with acute, U+00C1 ISOlat1" },
{ 194, "Acirc","latin capital letter A with circumflex, U+00C2 ISOlat1" },
{ 195, "Atilde","latin capital letter A with tilde, U+00C3 ISOlat1" },
{ 196, "Auml", "latin capital letter A with diaeresis, U+00C4 ISOlat1" },
{ 197, "Aring","latin capital letter A with ring above = latin capital letter A ring, U+00C5 ISOlat1" },
{ 198, "AElig","latin capital letter AE = latin capital ligature AE, U+00C6 ISOlat1" },
{ 199, "Ccedil","latin capital letter C with cedilla, U+00C7 ISOlat1" },
{ 200, "Egrave","latin capital letter E with grave, U+00C8 ISOlat1" },
{ 201, "Eacute","latin capital letter E with acute, U+00C9 ISOlat1" },
{ 202, "Ecirc","latin capital letter E with circumflex, U+00CA ISOlat1" },
{ 203, "Euml", "latin capital letter E with diaeresis, U+00CB ISOlat1" },
{ 204, "Igrave","latin capital letter I with grave, U+00CC ISOlat1" },
{ 205, "Iacute","latin capital letter I with acute, U+00CD ISOlat1" },
{ 206, "Icirc","latin capital letter I with circumflex, U+00CE ISOlat1" },
{ 207, "Iuml", "latin capital letter I with diaeresis, U+00CF ISOlat1" },
{ 208, "ETH", "latin capital letter ETH, U+00D0 ISOlat1" },
{ 209, "Ntilde","latin capital letter N with tilde, U+00D1 ISOlat1" },
{ 210, "Ograve","latin capital letter O with grave, U+00D2 ISOlat1" },
{ 211, "Oacute","latin capital letter O with acute, U+00D3 ISOlat1" },
{ 212, "Ocirc","latin capital letter O with circumflex, U+00D4 ISOlat1" },
{ 213, "Otilde","latin capital letter O with tilde, U+00D5 ISOlat1" },
{ 214, "Ouml", "latin capital letter O with diaeresis, U+00D6 ISOlat1" },
{ 215, "times","multiplication sign, U+00D7 ISOnum" },
{ 216, "Oslash","latin capital letter O with stroke latin capital letter O slash, U+00D8 ISOlat1" },
{ 217, "Ugrave","latin capital letter U with grave, U+00D9 ISOlat1" },
{ 218, "Uacute","latin capital letter U with acute, U+00DA ISOlat1" },
{ 219, "Ucirc","latin capital letter U with circumflex, U+00DB ISOlat1" },
{ 220, "Uuml", "latin capital letter U with diaeresis, U+00DC ISOlat1" },
{ 221, "Yacute","latin capital letter Y with acute, U+00DD ISOlat1" },
{ 222, "THORN","latin capital letter THORN, U+00DE ISOlat1" },
{ 223, "szlig","latin small letter sharp s = ess-zed, U+00DF ISOlat1" },
{ 224, "agrave","latin small letter a with grave = latin small letter a grave, U+00E0 ISOlat1" },
{ 225, "aacute","latin small letter a with acute, U+00E1 ISOlat1" },
{ 226, "acirc","latin small letter a with circumflex, U+00E2 ISOlat1" },
{ 227, "atilde","latin small letter a with tilde, U+00E3 ISOlat1" },
{ 228, "auml", "latin small letter a with diaeresis, U+00E4 ISOlat1" },
{ 229, "aring","latin small letter a with ring above = latin small letter a ring, U+00E5 ISOlat1" },
{ 230, "aelig","latin small letter ae = latin small ligature ae, U+00E6 ISOlat1" },
{ 231, "ccedil","latin small letter c with cedilla, U+00E7 ISOlat1" },
{ 232, "egrave","latin small letter e with grave, U+00E8 ISOlat1" },
{ 233, "eacute","latin small letter e with acute, U+00E9 ISOlat1" },
{ 234, "ecirc","latin small letter e with circumflex, U+00EA ISOlat1" },
{ 235, "euml", "latin small letter e with diaeresis, U+00EB ISOlat1" },
{ 236, "igrave","latin small letter i with grave, U+00EC ISOlat1" },
{ 237, "iacute","latin small letter i with acute, U+00ED ISOlat1" },
{ 238, "icirc","latin small letter i with circumflex, U+00EE ISOlat1" },
{ 239, "iuml", "latin small letter i with diaeresis, U+00EF ISOlat1" },
{ 240, "eth", "latin small letter eth, U+00F0 ISOlat1" },
{ 241, "ntilde","latin small letter n with tilde, U+00F1 ISOlat1" },
{ 242, "ograve","latin small letter o with grave, U+00F2 ISOlat1" },
{ 243, "oacute","latin small letter o with acute, U+00F3 ISOlat1" },
{ 244, "ocirc","latin small letter o with circumflex, U+00F4 ISOlat1" },
{ 245, "otilde","latin small letter o with tilde, U+00F5 ISOlat1" },
{ 246, "ouml", "latin small letter o with diaeresis, U+00F6 ISOlat1" },
{ 247, "divide","division sign, U+00F7 ISOnum" },
{ 248, "oslash","latin small letter o with stroke, = latin small letter o slash, U+00F8 ISOlat1" },
{ 249, "ugrave","latin small letter u with grave, U+00F9 ISOlat1" },
{ 250, "uacute","latin small letter u with acute, U+00FA ISOlat1" },
{ 251, "ucirc","latin small letter u with circumflex, U+00FB ISOlat1" },
{ 252, "uuml", "latin small letter u with diaeresis, U+00FC ISOlat1" },
{ 253, "yacute","latin small letter y with acute, U+00FD ISOlat1" },
{ 254, "thorn","latin small letter thorn with, U+00FE ISOlat1" },
{ 255, "yuml", "latin small letter y with diaeresis, U+00FF ISOlat1" },
/*
* Anything below should really be kept as entities references
*/
{ 402, "fnof", "latin small f with hook = function = florin, U+0192 ISOtech" },
{ 913, "Alpha","greek capital letter alpha, U+0391" },
{ 914, "Beta", "greek capital letter beta, U+0392" },
{ 915, "Gamma","greek capital letter gamma, U+0393 ISOgrk3" },
{ 916, "Delta","greek capital letter delta, U+0394 ISOgrk3" },
{ 917, "Epsilon","greek capital letter epsilon, U+0395" },
{ 918, "Zeta", "greek capital letter zeta, U+0396" },
{ 919, "Eta", "greek capital letter eta, U+0397" },
{ 920, "Theta","greek capital letter theta, U+0398 ISOgrk3" },
{ 921, "Iota", "greek capital letter iota, U+0399" },
{ 922, "Kappa","greek capital letter kappa, U+039A" },
{ 923, "Lambda""greek capital letter lambda, U+039B ISOgrk3" },
{ 924, "Mu", "greek capital letter mu, U+039C" },
{ 925, "Nu", "greek capital letter nu, U+039D" },
{ 926, "Xi", "greek capital letter xi, U+039E ISOgrk3" },
{ 927, "Omicron","greek capital letter omicron, U+039F" },
{ 928, "Pi", "greek capital letter pi, U+03A0 ISOgrk3" },
{ 929, "Rho", "greek capital letter rho, U+03A1" },
{ 931, "Sigma","greek capital letter sigma, U+03A3 ISOgrk3" },
{ 932, "Tau", "greek capital letter tau, U+03A4" },
{ 933, "Upsilon","greek capital letter upsilon, U+03A5 ISOgrk3" },
{ 934, "Phi", "greek capital letter phi, U+03A6 ISOgrk3" },
{ 935, "Chi", "greek capital letter chi, U+03A7" },
{ 936, "Psi", "greek capital letter psi, U+03A8 ISOgrk3" },
{ 937, "Omega","greek capital letter omega, U+03A9 ISOgrk3" },
{ 945, "alpha","greek small letter alpha, U+03B1 ISOgrk3" },
{ 946, "beta", "greek small letter beta, U+03B2 ISOgrk3" },
{ 947, "gamma","greek small letter gamma, U+03B3 ISOgrk3" },
{ 948, "delta","greek small letter delta, U+03B4 ISOgrk3" },
{ 949, "epsilon","greek small letter epsilon, U+03B5 ISOgrk3" },
{ 950, "zeta", "greek small letter zeta, U+03B6 ISOgrk3" },
{ 951, "eta", "greek small letter eta, U+03B7 ISOgrk3" },
{ 952, "theta","greek small letter theta, U+03B8 ISOgrk3" },
{ 953, "iota", "greek small letter iota, U+03B9 ISOgrk3" },
{ 954, "kappa","greek small letter kappa, U+03BA ISOgrk3" },
{ 955, "lambda","greek small letter lambda, U+03BB ISOgrk3" },
{ 956, "mu", "greek small letter mu, U+03BC ISOgrk3" },
{ 957, "nu", "greek small letter nu, U+03BD ISOgrk3" },
{ 958, "xi", "greek small letter xi, U+03BE ISOgrk3" },
{ 959, "omicron","greek small letter omicron, U+03BF NEW" },
{ 960, "pi", "greek small letter pi, U+03C0 ISOgrk3" },
{ 961, "rho", "greek small letter rho, U+03C1 ISOgrk3" },
{ 962, "sigmaf","greek small letter final sigma, U+03C2 ISOgrk3" },
{ 963, "sigma","greek small letter sigma, U+03C3 ISOgrk3" },
{ 964, "tau", "greek small letter tau, U+03C4 ISOgrk3" },
{ 965, "upsilon","greek small letter upsilon, U+03C5 ISOgrk3" },
{ 966, "phi", "greek small letter phi, U+03C6 ISOgrk3" },
{ 967, "chi", "greek small letter chi, U+03C7 ISOgrk3" },
{ 968, "psi", "greek small letter psi, U+03C8 ISOgrk3" },
{ 969, "omega","greek small letter omega, U+03C9 ISOgrk3" },
{ 977, "thetasym","greek small letter theta symbol, U+03D1 NEW" },
{ 978, "upsih","greek upsilon with hook symbol, U+03D2 NEW" },
{ 982, "piv", "greek pi symbol, U+03D6 ISOgrk3" },
{ 8226, "bull", "bullet = black small circle, U+2022 ISOpub" },
{ 8230, "hellip","horizontal ellipsis = three dot leader, U+2026 ISOpub" },
{ 8242, "prime","prime = minutes = feet, U+2032 ISOtech" },
{ 8243, "Prime","double prime = seconds = inches, U+2033 ISOtech" },
{ 8254, "oline","overline = spacing overscore, U+203E NEW" },
{ 8260, "frasl","fraction slash, U+2044 NEW" },
{ 8472, "weierp","script capital P = power set = Weierstrass p, U+2118 ISOamso" },
{ 8465, "image","blackletter capital I = imaginary part, U+2111 ISOamso" },
{ 8476, "real", "blackletter capital R = real part symbol, U+211C ISOamso" },
{ 8482, "trade","trade mark sign, U+2122 ISOnum" },
{ 8501, "alefsym","alef symbol = first transfinite cardinal, U+2135 NEW" },
{ 8592, "larr", "leftwards arrow, U+2190 ISOnum" },
{ 8593, "uarr", "upwards arrow, U+2191 ISOnum" },
{ 8594, "rarr", "rightwards arrow, U+2192 ISOnum" },
{ 8595, "darr", "downwards arrow, U+2193 ISOnum" },
{ 8596, "harr", "left right arrow, U+2194 ISOamsa" },
{ 8629, "crarr","downwards arrow with corner leftwards = carriage return, U+21B5 NEW" },
{ 8656, "lArr", "leftwards double arrow, U+21D0 ISOtech" },
{ 8657, "uArr", "upwards double arrow, U+21D1 ISOamsa" },
{ 8658, "rArr", "rightwards double arrow, U+21D2 ISOtech" },
{ 8659, "dArr", "downwards double arrow, U+21D3 ISOamsa" },
{ 8660, "hArr", "left right double arrow, U+21D4 ISOamsa" },
{ 8704, "forall","for all, U+2200 ISOtech" },
{ 8706, "part", "partial differential, U+2202 ISOtech" },
{ 8707, "exist","there exists, U+2203 ISOtech" },
{ 8709, "empty","empty set = null set = diameter, U+2205 ISOamso" },
{ 8711, "nabla","nabla = backward difference, U+2207 ISOtech" },
{ 8712, "isin", "element of, U+2208 ISOtech" },
{ 8713, "notin","not an element of, U+2209 ISOtech" },
{ 8715, "ni", "contains as member, U+220B ISOtech" },
{ 8719, "prod", "n-ary product = product sign, U+220F ISOamsb" },
{ 8721, "sum", "n-ary sumation, U+2211 ISOamsb" },
{ 8722, "minus","minus sign, U+2212 ISOtech" },
{ 8727, "lowast","asterisk operator, U+2217 ISOtech" },
{ 8730, "radic","square root = radical sign, U+221A ISOtech" },
{ 8733, "prop", "proportional to, U+221D ISOtech" },
{ 8734, "infin","infinity, U+221E ISOtech" },
{ 8736, "ang", "angle, U+2220 ISOamso" },
{ 8743, "and", "logical and = wedge, U+2227 ISOtech" },
{ 8744, "or", "logical or = vee, U+2228 ISOtech" },
{ 8745, "cap", "intersection = cap, U+2229 ISOtech" },
{ 8746, "cup", "union = cup, U+222A ISOtech" },
{ 8747, "int", "integral, U+222B ISOtech" },
{ 8756, "there4","therefore, U+2234 ISOtech" },
{ 8764, "sim", "tilde operator = varies with = similar to, U+223C ISOtech" },
{ 8773, "cong", "approximately equal to, U+2245 ISOtech" },
{ 8776, "asymp","almost equal to = asymptotic to, U+2248 ISOamsr" },
{ 8800, "ne", "not equal to, U+2260 ISOtech" },
{ 8801, "equiv","identical to, U+2261 ISOtech" },
{ 8804, "le", "less-than or equal to, U+2264 ISOtech" },
{ 8805, "ge", "greater-than or equal to, U+2265 ISOtech" },
{ 8834, "sub", "subset of, U+2282 ISOtech" },
{ 8835, "sup", "superset of, U+2283 ISOtech" },
{ 8836, "nsub", "not a subset of, U+2284 ISOamsn" },
{ 8838, "sube", "subset of or equal to, U+2286 ISOtech" },
{ 8839, "supe", "superset of or equal to, U+2287 ISOtech" },
{ 8853, "oplus","circled plus = direct sum, U+2295 ISOamsb" },
{ 8855, "otimes","circled times = vector product, U+2297 ISOamsb" },
{ 8869, "perp", "up tack = orthogonal to = perpendicular, U+22A5 ISOtech" },
{ 8901, "sdot", "dot operator, U+22C5 ISOamsb" },
{ 8968, "lceil","left ceiling = apl upstile, U+2308 ISOamsc" },
{ 8969, "rceil","right ceiling, U+2309 ISOamsc" },
{ 8970, "lfloor","left floor = apl downstile, U+230A ISOamsc" },
{ 8971, "rfloor","right floor, U+230B ISOamsc" },
{ 9001, "lang", "left-pointing angle bracket = bra, U+2329 ISOtech" },
{ 9002, "rang", "right-pointing angle bracket = ket, U+232A ISOtech" },
{ 9674, "loz", "lozenge, U+25CA ISOpub" },
{ 9824, "spades","black spade suit, U+2660 ISOpub" },
{ 9827, "clubs","black club suit = shamrock, U+2663 ISOpub" },
{ 9829, "hearts","black heart suit = valentine, U+2665 ISOpub" },
{ 9830, "diams","black diamond suit, U+2666 ISOpub" },
{ 338, "OElig","latin capital ligature OE, U+0152 ISOlat2" },
{ 339, "oelig","latin small ligature oe, U+0153 ISOlat2" },
{ 352, "Scaron","latin capital letter S with caron, U+0160 ISOlat2" },
{ 353, "scaron","latin small letter s with caron, U+0161 ISOlat2" },
{ 376, "Yuml", "latin capital letter Y with diaeresis, U+0178 ISOlat2" },
{ 710, "circ", "modifier letter circumflex accent, U+02C6 ISOpub" },
{ 732, "tilde","small tilde, U+02DC ISOdia" },
{ 8194, "ensp", "en space, U+2002 ISOpub" },
{ 8195, "emsp", "em space, U+2003 ISOpub" },
{ 8201, "thinsp","thin space, U+2009 ISOpub" },
{ 8204, "zwnj", "zero width non-joiner, U+200C NEW RFC 2070" },
{ 8205, "zwj", "zero width joiner, U+200D NEW RFC 2070" },
{ 8206, "lrm", "left-to-right mark, U+200E NEW RFC 2070" },
{ 8207, "rlm", "right-to-left mark, U+200F NEW RFC 2070" },
{ 8211, "ndash","en dash, U+2013 ISOpub" },
{ 8212, "mdash","em dash, U+2014 ISOpub" },
{ 8216, "lsquo","left single quotation mark, U+2018 ISOnum" },
{ 8217, "rsquo","right single quotation mark, U+2019 ISOnum" },
{ 8218, "sbquo","single low-9 quotation mark, U+201A NEW" },
{ 8220, "ldquo","left double quotation mark, U+201C ISOnum" },
{ 8221, "rdquo","right double quotation mark, U+201D ISOnum" },
{ 8222, "bdquo","double low-9 quotation mark, U+201E NEW" },
{ 8224, "dagger","dagger, U+2020 ISOpub" },
{ 8225, "Dagger","double dagger, U+2021 ISOpub" },
{ 8240, "permil","per mille sign, U+2030 ISOtech" },
{ 8249, "lsaquo","single left-pointing angle quotation mark, U+2039 ISO proposed" },
{ 8250, "rsaquo","single right-pointing angle quotation mark, U+203A ISO proposed" },
{ 8364, "euro", "euro sign, U+20AC NEW" }
};
/************************************************************************
* *
* Commodity functions to handle entities *
* *
************************************************************************/
/*
* Macro used to grow the current buffer.
*/
#define growBuffer(buffer) { \
buffer##_size *= 2; \
buffer = (xmlChar *) xmlRealloc(buffer, buffer##_size * sizeof(xmlChar)); \
if (buffer == NULL) { \
perror("realloc failed"); \
return(NULL); \
} \
}
/**
* htmlEntityLookup:
* @name: the entity name
*
* Lookup the given entity in EntitiesTable
*
* TODO: the linear scan is really ugly, an hash table is really needed.
*
* Returns the associated htmlEntityDescPtr if found, NULL otherwise.
*/
htmlEntityDescPtr
htmlEntityLookup(const xmlChar *name) {
int i;
for (i = 0;i < (sizeof(html40EntitiesTable)/
sizeof(html40EntitiesTable[0]));i++) {
if (!xmlStrcmp(name, BAD_CAST html40EntitiesTable[i].name)) {
#ifdef DEBUG
fprintf(stderr,"Found entity %s\n", name);
#endif
return(&html40EntitiesTable[i]);
}
}
return(NULL);
}
/**
* UTF8ToHtml:
* @out: a pointer to an array of bytes to store the result
* @outlen: the length of @out
* @in: a pointer to an array of UTF-8 chars
* @inlen: the length of @in
*
* Take a block of UTF-8 chars in and try to convert it to an ASCII
* plus HTML entities block of chars out.
*
* Returns 0 if success, -2 if the transcoding fails, or -1 otherwise
* The value of @inlen after return is the number of octets consumed
* as the return value is positive, else unpredictiable.
* The value of @outlen after return is the number of octets consumed.
*/
int
UTF8ToHtml(unsigned char* out, int *outlen,
const unsigned char* in, int *inlen) {
const unsigned char* processed = in;
const unsigned char* outend;
const unsigned char* outstart = out;
const unsigned char* instart = in;
const unsigned char* inend;
unsigned int c, d;
int trailing;
if (in == NULL) {
/*
* initialization nothing to do
*/
*outlen = 0;
*inlen = 0;
return(0);
}
inend = in + (*inlen);
outend = out + (*outlen);
while (in < inend) {
d = *in++;
if (d < 0x80) { c= d; trailing= 0; }
else if (d < 0xC0) {
/* trailing byte in leading position */
*outlen = out - outstart;
*inlen = processed - instart;
return(-2);
} else if (d < 0xE0) { c= d & 0x1F; trailing= 1; }
else if (d < 0xF0) { c= d & 0x0F; trailing= 2; }
else if (d < 0xF8) { c= d & 0x07; trailing= 3; }
else {
/* no chance for this in Ascii */
*outlen = out - outstart;
*inlen = processed - instart;
return(-2);
}
if (inend - in < trailing) {
break;
}
for ( ; trailing; trailing--) {
if ((in >= inend) || (((d= *in++) & 0xC0) != 0x80))
break;
c <<= 6;
c |= d & 0x3F;
}
/* assertion: c is a single UTF-4 value */
if (c < 0x80) {
if (out >= outend)
break;
*out++ = c;
} else {
int i, j, len;
/*
* Try to lookup a predefined HTML entity for it
*/
for (i = 0;i < (sizeof(html40EntitiesTable)/
sizeof(html40EntitiesTable[0]));i++) {
if (html40EntitiesTable[i].value == c) {
#ifdef DEBUG
fprintf(stderr,"Found entity %s\n",
html40EntitiesTable[i].name);
#endif
goto found_ent;
}
if (html40EntitiesTable[i].value > c)
break;
}
/* no chance for this in Ascii */
*outlen = out - outstart;
*inlen = processed - instart;
return(-2);
found_ent:
len = strlen(html40EntitiesTable[i].name);
if (out + 2 + len >= outend)
break;
*out++ = '&';
for (j = 0;j < len;j++)
*out++ = html40EntitiesTable[i].name[j];
*out++ = ';';
}
processed = in;
}
*outlen = out - outstart;
*inlen = processed - instart;
return(0);
}
/**
* htmlDecodeEntities:
* @ctxt: the parser context
* @len: the len to decode (in bytes !), -1 for no size limit
* @end: an end marker xmlChar, 0 if none
* @end2: an end marker xmlChar, 0 if none
* @end3: an end marker xmlChar, 0 if none
*
* Subtitute the HTML entities by their value
*
* DEPRECATED !!!!
*
* Returns A newly allocated string with the substitution done. The caller
* must deallocate it !
*/
xmlChar *
htmlDecodeEntities(htmlParserCtxtPtr ctxt, int len,
xmlChar end, xmlChar end2, xmlChar end3) {
xmlChar *name = NULL;
xmlChar *buffer = NULL;
unsigned int buffer_size = 0;
unsigned int nbchars = 0;
htmlEntityDescPtr ent;
unsigned int max = (unsigned int) len;
int c,l;
if (ctxt->depth > 40) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Detected entity reference loop\n");
ctxt->wellFormed = 0;
ctxt->disableSAX = 1;
ctxt->errNo = XML_ERR_ENTITY_LOOP;
return(NULL);
}
/*
* allocate a translation buffer.
*/
buffer_size = HTML_PARSER_BIG_BUFFER_SIZE;
buffer = (xmlChar *) xmlMalloc(buffer_size * sizeof(xmlChar));
if (buffer == NULL) {
perror("xmlDecodeEntities: malloc failed");
return(NULL);
}
/*
* Ok loop until we reach one of the ending char or a size limit.
*/
c = CUR_CHAR(l);
while ((nbchars < max) && (c != end) &&
(c != end2) && (c != end3)) {
if (c == 0) break;
if (((c == '&') && (ctxt->token != '&')) && (NXT(1) == '#')) {
int val = htmlParseCharRef(ctxt);
COPY_BUF(0,buffer,nbchars,val);
NEXTL(l);
} else if ((c == '&') && (ctxt->token != '&')) {
ent = htmlParseEntityRef(ctxt, &name);
if (name != NULL) {
if (ent != NULL) {
int val = ent->value;
COPY_BUF(0,buffer,nbchars,val);
NEXTL(l);
} else {
const xmlChar *cur = name;
buffer[nbchars++] = '&';
if (nbchars > buffer_size - HTML_PARSER_BUFFER_SIZE) {
growBuffer(buffer);
}
while (*cur != 0) {
buffer[nbchars++] = *cur++;
}
buffer[nbchars++] = ';';
}
}
} else {
COPY_BUF(l,buffer,nbchars,c);
NEXTL(l);
if (nbchars > buffer_size - HTML_PARSER_BUFFER_SIZE) {
growBuffer(buffer);
}
}
c = CUR_CHAR(l);
}
buffer[nbchars++] = 0;
return(buffer);
}
/************************************************************************
* *
* Commodity functions to handle streams *
* *
************************************************************************/
/**
* htmlFreeInputStream:
* @input: an htmlParserInputPtr
*
* Free up an input stream.
*/
void
htmlFreeInputStream(htmlParserInputPtr input) {
if (input == NULL) return;
if (input->filename != NULL) xmlFree((char *) input->filename);
if (input->directory != NULL) xmlFree((char *) input->directory);
if ((input->free != NULL) && (input->base != NULL))
input->free((xmlChar *) input->base);
if (input->buf != NULL)
xmlFreeParserInputBuffer(input->buf);
memset(input, -1, sizeof(htmlParserInput));
xmlFree(input);
}
/**
* htmlNewInputStream:
* @ctxt: an HTML parser context
*
* Create a new input stream structure
* Returns the new input stream or NULL
*/
htmlParserInputPtr
htmlNewInputStream(htmlParserCtxtPtr ctxt) {
htmlParserInputPtr input;
input = (xmlParserInputPtr) xmlMalloc(sizeof(htmlParserInput));
if (input == NULL) {
ctxt->errNo = XML_ERR_NO_MEMORY;
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"malloc: couldn't allocate a new input stream\n");
ctxt->errNo = XML_ERR_NO_MEMORY;
return(NULL);
}
memset(input, 0, sizeof(htmlParserInput));
input->filename = NULL;
input->directory = NULL;
input->base = NULL;
input->cur = NULL;
input->buf = NULL;
input->line = 1;
input->col = 1;
input->buf = NULL;
input->free = NULL;
input->version = NULL;
input->consumed = 0;
input->length = 0;
return(input);
}
/************************************************************************
* *
* Commodity functions, cleanup needed ? *
* *
************************************************************************/
/**
* areBlanks:
* @ctxt: an HTML parser context
* @str: a xmlChar *
* @len: the size of @str
*
* Is this a sequence of blank chars that one can ignore ?
*
* Returns 1 if ignorable 0 otherwise.
*/
static int areBlanks(htmlParserCtxtPtr ctxt, const xmlChar *str, int len) {
int i;
xmlNodePtr lastChild;
for (i = 0;i < len;i++)
if (!(IS_BLANK(str[i]))) return(0);
if (CUR == 0) return(1);
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.
*/
htmlCheckParagraph(ctxt);
if ((ctxt->sax != NULL) && (ctxt->sax->characters != NULL))
ctxt->sax->characters(ctxt->userData, entity->content, len);
}
/**
* htmlNewDocNoDtD:
* @URI: URI for the dtd, or NULL
* @ExternalID: the external ID of the DTD, or NULL
*
* Returns a new document, do not intialize the DTD if not provided
*/
htmlDocPtr
htmlNewDocNoDtD(const xmlChar *URI, const xmlChar *ExternalID) {
xmlDocPtr cur;
/*
* Allocate a new document and fill the fields.
*/
cur = (xmlDocPtr) xmlMalloc(sizeof(xmlDoc));
if (cur == NULL) {
fprintf(stderr, "xmlNewDoc : malloc failed\n");
return(NULL);
}
memset(cur, 0, sizeof(xmlDoc));
cur->type = XML_HTML_DOCUMENT_NODE;
cur->version = NULL;
cur->intSubset = NULL;
if ((ExternalID != NULL) ||
(URI != NULL))
xmlCreateIntSubset(cur, BAD_CAST "HTML", ExternalID, URI);
cur->doc = cur;
cur->name = NULL;
cur->children = NULL;
cur->extSubset = NULL;
cur->oldNs = NULL;
cur->encoding = NULL;
cur->standalone = 1;
cur->compression = 0;
cur->ids = NULL;
cur->refs = NULL;
#ifndef XML_WITHOUT_CORBA
cur->_private = NULL;
#endif
return(cur);
}
/**
* htmlNewDoc:
* @URI: URI for the dtd, or NULL
* @ExternalID: the external ID of the DTD, or NULL
*
* Returns a new document
*/
htmlDocPtr
htmlNewDoc(const xmlChar *URI, const xmlChar *ExternalID) {
if ((URI == NULL) && (ExternalID == NULL))
return(htmlNewDocNoDtD(
BAD_CAST "-//W3C//DTD HTML 4.0 Transitional//EN",
BAD_CAST "http://www.w3.org/TR/REC-html40/loose.dtd"));
return(htmlNewDocNoDtD(URI, ExternalID));
}
/************************************************************************
* *
* 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 lowercase
* since HTML names are not case-sensitive.
*
* Returns the Tag Name parsed or NULL
*/
xmlChar *
htmlParseHTMLName(htmlParserCtxtPtr ctxt) {
xmlChar *ret = NULL;
int i = 0;
xmlChar loc[HTML_PARSER_BUFFER_SIZE];
if (!IS_LETTER(CUR) && (CUR != '_') &&
(CUR != ':')) return(NULL);
while ((i < HTML_PARSER_BUFFER_SIZE) &&
((IS_LETTER(CUR)) || (IS_DIGIT(CUR)) ||
(CUR == ':') || (CUR == '_'))) {
if ((CUR >= 'A') && (CUR <= 'Z')) 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
*/
xmlChar *
htmlParseName(htmlParserCtxtPtr ctxt) {
xmlChar buf[HTML_MAX_NAMELEN];
int len = 0;
GROW;
if (!IS_LETTER(CUR) && (CUR != '_')) {
return(NULL);
}
while ((IS_LETTER(CUR)) || (IS_DIGIT(CUR)) ||
(CUR == '.') || (CUR == '-') ||
(CUR == '_') || (CUR == ':') ||
(IS_COMBINING(CUR)) ||
(IS_EXTENDER(CUR))) {
buf[len++] = CUR;
NEXT;
if (len >= HTML_MAX_NAMELEN) {
fprintf(stderr,
"htmlParseName: reached HTML_MAX_NAMELEN limit\n");
while ((IS_LETTER(CUR)) || (IS_DIGIT(CUR)) ||
(CUR == '.') || (CUR == '-') ||
(CUR == '_') || (CUR == ':') ||
(IS_COMBINING(CUR)) ||
(IS_EXTENDER(CUR)))
NEXT;
break;
}
}
return(xmlStrndup(buf, len));
}
/**
* htmlParseHTMLAttribute:
* @ctxt: an HTML parser context
* @stop: a char stop value
*
* parse an HTML attribute value till the stop (quote), if
* stop is 0 then it stops at the first space
*
* Returns the attribute parsed or NULL
*/
xmlChar *
htmlParseHTMLAttribute(htmlParserCtxtPtr ctxt, const xmlChar stop) {
#if 0
xmlChar buf[HTML_MAX_NAMELEN];
int len = 0;
GROW;
while ((CUR != 0) && (CUR != stop) && (CUR != '>')) {
if ((stop == 0) && (IS_BLANK(CUR))) break;
buf[len++] = CUR;
NEXT;
if (len >= HTML_MAX_NAMELEN) {
fprintf(stderr,
"htmlParseHTMLAttribute: reached HTML_MAX_NAMELEN limit\n");
while ((!IS_BLANK(CUR)) && (CUR != '<') &&
(CUR != '>') &&
(CUR != '\'') && (CUR != '"'))
NEXT;
break;
}
}
return(xmlStrndup(buf, len));
#else
xmlChar *buffer = NULL;
int buffer_size = 0;
xmlChar *out = NULL;
xmlChar *name = NULL;
xmlChar *cur = NULL;
htmlEntityDescPtr ent;
/*
* allocate a translation buffer.
*/
buffer_size = HTML_PARSER_BIG_BUFFER_SIZE;
buffer = (xmlChar *) xmlMalloc(buffer_size * sizeof(xmlChar));
if (buffer == NULL) {
perror("htmlParseHTMLAttribute: malloc failed");
return(NULL);
}
out = buffer;
/*
* Ok loop until we reach one of the ending chars
*/
while ((CUR != 0) && (CUR != stop) && (CUR != '>')) {
if ((stop == 0) && (IS_BLANK(CUR))) break;
if (CUR == '&') {
if (NXT(1) == '#') {
unsigned int c;
int bits;
c = htmlParseCharRef(ctxt);
if (c < 0x80)
{ *out++ = c; bits= -6; }
else if (c < 0x800)
{ *out++ =((c >> 6) & 0x1F) | 0xC0; bits= 0; }
else if (c < 0x10000)
{ *out++ =((c >> 12) & 0x0F) | 0xE0; bits= 6; }
else
{ *out++ =((c >> 18) & 0x07) | 0xF0; bits= 12; }
for ( ; bits >= 0; bits-= 6) {
*out++ = ((c >> bits) & 0x3F) | 0x80;
}
} else {
ent = htmlParseEntityRef(ctxt, &name);
if (name == NULL) {
*out++ = '&';
if (out - buffer > buffer_size - 100) {
int index = out - buffer;
growBuffer(buffer);
out = &buffer[index];
}
} else if (ent == NULL) {
*out++ = '&';
cur = name;
while (*cur != 0) {
if (out - buffer > buffer_size - 100) {
int index = out - buffer;
growBuffer(buffer);
out = &buffer[index];
}
*out++ = *cur++;
}
xmlFree(name);
} else {
unsigned int c;
int bits;
if (out - buffer > buffer_size - 100) {
int index = out - buffer;
growBuffer(buffer);
out = &buffer[index];
}
c = (xmlChar)ent->value;
if (c < 0x80)
{ *out++ = c; bits= -6; }
else if (c < 0x800)
{ *out++ =((c >> 6) & 0x1F) | 0xC0; bits= 0; }
else if (c < 0x10000)
{ *out++ =((c >> 12) & 0x0F) | 0xE0; bits= 6; }
else
{ *out++ =((c >> 18) & 0x07) | 0xF0; bits= 12; }
for ( ; bits >= 0; bits-= 6) {
*out++ = ((c >> bits) & 0x3F) | 0x80;
}
xmlFree(name);
}
}
} else {
unsigned int c;
int bits;
if (out - buffer > buffer_size - 100) {
int index = out - buffer;
growBuffer(buffer);
out = &buffer[index];
}
c = CUR;
if (c < 0x80)
{ *out++ = c; bits= -6; }
else if (c < 0x800)
{ *out++ =((c >> 6) & 0x1F) | 0xC0; bits= 0; }
else if (c < 0x10000)
{ *out++ =((c >> 12) & 0x0F) | 0xE0; bits= 6; }
else
{ *out++ =((c >> 18) & 0x07) | 0xF0; bits= 12; }
for ( ; bits >= 0; bits-= 6) {
*out++ = ((c >> bits) & 0x3F) | 0x80;
}
NEXT;
}
}
*out++ = 0;
return(buffer);
#endif
}
/**
* htmlParseNmtoken:
* @ctxt: an HTML parser context
*
* parse an HTML Nmtoken.
*
* Returns the Nmtoken parsed or NULL
*/
xmlChar *
htmlParseNmtoken(htmlParserCtxtPtr ctxt) {
xmlChar buf[HTML_MAX_NAMELEN];
int len = 0;
GROW;
while ((IS_LETTER(CUR)) || (IS_DIGIT(CUR)) ||
(CUR == '.') || (CUR == '-') ||
(CUR == '_') || (CUR == ':') ||
(IS_COMBINING(CUR)) ||
(IS_EXTENDER(CUR))) {
buf[len++] = CUR;
NEXT;
if (len >= HTML_MAX_NAMELEN) {
fprintf(stderr,
"htmlParseNmtoken: reached HTML_MAX_NAMELEN limit\n");
while ((IS_LETTER(CUR)) || (IS_DIGIT(CUR)) ||
(CUR == '.') || (CUR == '-') ||
(CUR == '_') || (CUR == ':') ||
(IS_COMBINING(CUR)) ||
(IS_EXTENDER(CUR)))
NEXT;
break;
}
}
return(xmlStrndup(buf, len));
}
/**
* htmlParseEntityRef:
* @ctxt: an HTML parser context
* @str: location to store the entity name
*
* parse an HTML ENTITY references
*
* [68] EntityRef ::= '&' Name ';'
*
* Returns the associated htmlEntityDescPtr if found, or NULL otherwise,
* if non-NULL *str will have to be freed by the caller.
*/
htmlEntityDescPtr
htmlParseEntityRef(htmlParserCtxtPtr ctxt, xmlChar **str) {
xmlChar *name;
htmlEntityDescPtr ent = NULL;
*str = NULL;
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 {
GROW;
if (CUR == ';') {
*str = name;
/*
* Lookup the entity in the table.
*/
ent = htmlEntityLookup(name);
if (ent != NULL) /* OK that's ugly !!! */
NEXT;
} else {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"htmlParseEntityRef: expecting ';'\n");
*str = 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
*
* Returns the AttValue parsed or NULL.
*/
xmlChar *
htmlParseAttValue(htmlParserCtxtPtr ctxt) {
xmlChar *ret = NULL;
if (CUR == '"') {
NEXT;
ret = htmlParseHTMLAttribute(ctxt, '"');
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;
ret = htmlParseHTMLAttribute(ctxt, '\'');
if (CUR != '\'') {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "AttValue: ' expected\n");
ctxt->wellFormed = 0;
} else
NEXT;
} else {
/*
* That's an HTMLism, the attribute value may not be quoted
*/
ret = htmlParseHTMLAttribute(ctxt, 0);
if (ret == NULL) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "AttValue: no value found\n");
ctxt->wellFormed = 0;
}
}
return(ret);
}
/**
* htmlParseSystemLiteral:
* @ctxt: an HTML parser context
*
* parse an HTML Literal
*
* [11] SystemLiteral ::= ('"' [^"]* '"') | ("'" [^']* "'")
*
* Returns the SystemLiteral parsed or NULL
*/
xmlChar *
htmlParseSystemLiteral(htmlParserCtxtPtr ctxt) {
const xmlChar *q;
xmlChar *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.
*/
xmlChar *
htmlParsePubidLiteral(htmlParserCtxtPtr ctxt) {
const xmlChar *q;
xmlChar *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) {
xmlChar buf[HTML_PARSER_BIG_BUFFER_SIZE + 5];
int nbchar = 0;
int cur, l;
SHRINK;
cur = CUR_CHAR(l);
while (((cur != '<') || (ctxt->token == '<')) &&
((cur != '&') || (ctxt->token == '&')) &&
(IS_CHAR(cur))) {
COPY_BUF(l,buf,nbchar,cur);
if (nbchar >= HTML_PARSER_BIG_BUFFER_SIZE) {
/*
* Ok the segment is to be consumed as chars.
*/
if ((ctxt->sax != NULL) && (!ctxt->disableSAX)) {
if (areBlanks(ctxt, buf, nbchar)) {
if (ctxt->sax->ignorableWhitespace != NULL)
ctxt->sax->ignorableWhitespace(ctxt->userData,
buf, nbchar);
} else {
htmlCheckParagraph(ctxt);
if (ctxt->sax->characters != NULL)
ctxt->sax->characters(ctxt->userData, buf, nbchar);
}
}
nbchar = 0;
}
NEXTL(l);
cur = CUR_CHAR(l);
}
if (nbchar != 0) {
/*
* Ok the segment is to be consumed as chars.
*/
if ((ctxt->sax != NULL) && (!ctxt->disableSAX)) {
if (areBlanks(ctxt, buf, nbchar)) {
if (ctxt->sax->ignorableWhitespace != NULL)
ctxt->sax->ignorableWhitespace(ctxt->userData, buf, nbchar);
} else {
htmlCheckParagraph(ctxt);
if (ctxt->sax->characters != NULL)
ctxt->sax->characters(ctxt->userData, buf, nbchar);
}
}
}
}
/**
* htmlParseExternalID:
* @ctxt: an HTML parser context
* @publicID: a xmlChar** 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.
*/
xmlChar *
htmlParseExternalID(htmlParserCtxtPtr ctxt, xmlChar **publicID, int strict) {
xmlChar *URI = NULL;
if ((UPPER == 'S') && (UPP(1) == 'Y') &&
(UPP(2) == 'S') && (UPP(3) == 'T') &&
(UPP(4) == 'E') && (UPP(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 ((UPPER == 'P') && (UPP(1) == 'U') &&
(UPP(2) == 'B') && (UPP(3) == 'L') &&
(UPP(4) == 'I') && (UPP(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;
}
SKIP_BLANKS;
if ((CUR == '"') || (CUR == '\'')) {
URI = htmlParseSystemLiteral(ctxt);
}
}
return(URI);
}
/**
* htmlParseComment:
* @ctxt: an HTML parser context
*
* Parse an XML (SGML) comment <!-- .... -->
*
* [15] Comment ::= '<!--' ((Char - '-') | ('-' (Char - '-')))* '-->'
*/
void
htmlParseComment(htmlParserCtxtPtr ctxt) {
xmlChar *buf = NULL;
int len;
int size = HTML_PARSER_BUFFER_SIZE;
int q, ql;
int r, rl;
int cur, l;
xmlParserInputState state;
/*
* Check that there is a comment right here.
*/
if ((RAW != '<') || (NXT(1) != '!') ||
(NXT(2) != '-') || (NXT(3) != '-')) return;
state = ctxt->instate;
ctxt->instate = XML_PARSER_COMMENT;
SHRINK;
SKIP(4);
buf = (xmlChar *) xmlMalloc(size * sizeof(xmlChar));
if (buf == NULL) {
fprintf(stderr, "malloc of %d byte failed\n", size);
ctxt->instate = state;
return;
}
q = CUR_CHAR(ql);
NEXTL(ql);
r = CUR_CHAR(rl);
NEXTL(rl);
cur = CUR_CHAR(l);
len = 0;
while (IS_CHAR(cur) &&
((cur != '>') ||
(r != '-') || (q != '-'))) {
if (len + 5 >= size) {
size *= 2;
buf = (xmlChar *) xmlRealloc(buf, size * sizeof(xmlChar));
if (buf == NULL) {
fprintf(stderr, "realloc of %d byte failed\n", size);
ctxt->instate = state;
return;
}
}
COPY_BUF(ql,buf,len,q);
q = r;
ql = rl;
r = cur;
rl = l;
NEXTL(l);
cur = CUR_CHAR(l);
if (cur == 0) {
SHRINK;
GROW;
cur = CUR_CHAR(l);
}
}
buf[len] = 0;
if (!IS_CHAR(cur)) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Comment not terminated \n<!--%.50s\n", buf);
ctxt->errNo = XML_ERR_COMMENT_NOT_FINISHED;
ctxt->wellFormed = 0;
xmlFree(buf);
} else {
NEXT;
if ((ctxt->sax != NULL) && (ctxt->sax->comment != NULL) &&
(!ctxt->disableSAX))
ctxt->sax->comment(ctxt->userData, buf);
xmlFree(buf);
}
ctxt->instate = state;
}
/**
* 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 xmlChar 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) {
xmlChar *name;
xmlChar *ExternalID = NULL;
xmlChar *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;
}
/*
* Check that upper(name) == "HTML" !!!!!!!!!!!!!
*/
SKIP_BLANKS;
/*
* Check for SystemID and ExternalID
*/
URI = htmlParseExternalID(ctxt, &ExternalID, 0);
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 ... */
}
NEXT;
/*
* Create or update the document accordingly to the DOCTYPE
*/
if ((ctxt->sax != NULL) && (ctxt->sax->internalSubset != NULL) &&
(!ctxt->disableSAX))
ctxt->sax->internalSubset(ctxt->userData, name, ExternalID, URI);
/*
* Cleanup, since we don't use all those identifiers
*/
if (URI != NULL) xmlFree(URI);
if (ExternalID != NULL) xmlFree(ExternalID);
if (name != NULL) xmlFree(name);
}
/**
* htmlParseAttribute:
* @ctxt: an HTML parser context
* @value: a xmlChar ** 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.
*/
xmlChar *
htmlParseAttribute(htmlParserCtxtPtr ctxt, xmlChar **value) {
xmlChar *name, *val = NULL;
*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 {
* TODO : some attribute must have values, some may not
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->warning(ctxt->userData,
"No value for attribute %s\n", name); */
}
*value = val;
return(name);
}
/**
* htmlCheckEncoding:
* @ctxt: an HTML parser context
* @attvalue: the attribute value
*
* Checks an http-equiv attribute from a Meta tag to detect
* the encoding
* If a new encoding is detected the parser is switched to decode
* it and pass UTF8
*/
void
htmlCheckEncoding(htmlParserCtxtPtr ctxt, const xmlChar *attvalue) {
const xmlChar *encoding;
if ((ctxt == NULL) || (attvalue == NULL))
return;
encoding = xmlStrstr(attvalue, BAD_CAST"charset=");
if (encoding == NULL)
encoding = xmlStrstr(attvalue, BAD_CAST"Charset=");
if (encoding == NULL)
encoding = xmlStrstr(attvalue, BAD_CAST"CHARSET=");
if (encoding != NULL) {
encoding += 8;
} else {
encoding = xmlStrstr(attvalue, BAD_CAST"charset =");
if (encoding == NULL)
encoding = xmlStrstr(attvalue, BAD_CAST"Charset =");
if (encoding == NULL)
encoding = xmlStrstr(attvalue, BAD_CAST"CHARSET =");
if (encoding != NULL)
encoding += 9;
}
if (encoding != NULL) {
xmlCharEncoding enc;
xmlCharEncodingHandlerPtr handler;
while ((*encoding == ' ') || (*encoding == '\t')) encoding++;
if (ctxt->input->encoding != NULL)
xmlFree((xmlChar *) ctxt->input->encoding);
ctxt->input->encoding = xmlStrdup(encoding);
enc = xmlParseCharEncoding((const char *) encoding);
/*
* registered set of known encodings
*/
if (enc != XML_CHAR_ENCODING_ERROR) {
xmlSwitchEncoding(ctxt, enc);
ctxt->charset = XML_CHAR_ENCODING_UTF8;
} else {
/*
* fallback for unknown encodings
*/
handler = xmlFindCharEncodingHandler((const char *) encoding);
if (handler != NULL) {
xmlSwitchToEncoding(ctxt, handler);
ctxt->charset = XML_CHAR_ENCODING_UTF8;
} else {
ctxt->errNo = XML_ERR_UNSUPPORTED_ENCODING;
}
}
if ((ctxt->input->buf != NULL) &&
(ctxt->input->buf->encoder != NULL) &&
(ctxt->input->buf->raw != NULL) &&
(ctxt->input->buf->buffer != NULL)) {
int nbchars;
int processed;
/*
* convert as much as possible to the parser reading buffer.
*/
processed = ctxt->input->cur - ctxt->input->base;
xmlBufferShrink(ctxt->input->buf->buffer, processed);
nbchars = xmlCharEncInFunc(ctxt->input->buf->encoder,
ctxt->input->buf->buffer,
ctxt->input->buf->raw);
if (nbchars < 0) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"htmlCheckEncoding: encoder error\n");
ctxt->errNo = XML_ERR_INVALID_ENCODING;
}
ctxt->input->base =
ctxt->input->cur = ctxt->input->buf->buffer->content;
}
}
}
/**
* htmlCheckMeta:
* @ctxt: an HTML parser context
* @atts: the attributes values
*
* Checks an attributes from a Meta tag
*/
void
htmlCheckMeta(htmlParserCtxtPtr ctxt, const xmlChar **atts) {
int i;
const xmlChar *att, *value;
int http = 0;
const xmlChar *content = NULL;
if ((ctxt == NULL) || (atts == NULL))
return;
i = 0;
att = atts[i++];
while (att != NULL) {
value = atts[i++];
if ((value != NULL) &&
((!xmlStrcmp(att, BAD_CAST"http-equiv")) ||
(!xmlStrcmp(att, BAD_CAST"Http-Equiv")) ||
(!xmlStrcmp(att, BAD_CAST"HTTP-EQUIV"))) &&
((!xmlStrcmp(value, BAD_CAST"Content-Type")) ||
(!xmlStrcmp(value, BAD_CAST"content-type")) ||
(!xmlStrcmp(value, BAD_CAST"CONTENT-TYPE"))))
http = 1;
else if ((value != NULL) &&
((!xmlStrcmp(att, BAD_CAST"content")) ||
(!xmlStrcmp(att, BAD_CAST"Content")) ||
(!xmlStrcmp(att, BAD_CAST"CONTENT"))))
content = value;
att = atts[i++];
}
if ((http) && (content != NULL))
htmlCheckEncoding(ctxt, content);
}
/**
* 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? '/>'
*
*/
void
htmlParseStartTag(htmlParserCtxtPtr ctxt) {
xmlChar *name;
xmlChar *attname;
xmlChar *attvalue;
const xmlChar **atts = NULL;
int nbatts = 0;
int maxatts = 0;
int meta = 0;
int i;
if (CUR != '<') return;
NEXT;
GROW;
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;
}
if (!xmlStrcmp(name, BAD_CAST"meta"))
meta = 1;
/*
* Check for auto-closure of HTML elements.
*/
htmlAutoClose(ctxt, name);
/*
* Check for implied HTML elements.
*/
htmlCheckImplied(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) != '>'))) {
long cons = ctxt->nbChars;
GROW;
attname = htmlParseAttribute(ctxt, &attvalue);
if (attname != 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",
attname);
ctxt->wellFormed = 0;
xmlFree(attname);
if (attvalue != NULL)
xmlFree(attvalue);
goto failed;
}
}
/*
* Add the pair to atts
*/
if (atts == NULL) {
maxatts = 10;
atts = (const xmlChar **) xmlMalloc(maxatts * sizeof(xmlChar *));
if (atts == NULL) {
fprintf(stderr, "malloc of %ld byte failed\n",
maxatts * (long)sizeof(xmlChar *));
if (name != NULL) xmlFree(name);
return;
}
} else if (nbatts + 4 > maxatts) {
maxatts *= 2;
atts = (const xmlChar **) xmlRealloc(atts, maxatts * sizeof(xmlChar *));
if (atts == NULL) {
fprintf(stderr, "realloc of %ld byte failed\n",
maxatts * (long)sizeof(xmlChar *));
if (name != NULL) xmlFree(name);
return;
}
}
atts[nbatts++] = attname;
atts[nbatts++] = attvalue;
atts[nbatts] = NULL;
atts[nbatts + 1] = NULL;
}
failed:
SKIP_BLANKS;
if (cons == ctxt->nbChars) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"htmlParseStartTag: problem parsing attributes\n");
ctxt->wellFormed = 0;
break;
}
}
/*
* Handle specific association to the META tag
*/
if (meta)
htmlCheckMeta(ctxt, atts);
/*
* SAX: Start of Element !
*/
htmlnamePush(ctxt, xmlStrdup(name));
#ifdef DEBUG
fprintf(stderr,"Start of element %s: pushed %s\n", name, ctxt->name);
#endif
if ((ctxt->sax != NULL) && (ctxt->sax->startElement != NULL))
ctxt->sax->startElement(ctxt->userData, name, atts);
if (atts != NULL) {
for (i = 0;i < nbatts;i++) {
if (atts[i] != NULL)
xmlFree((xmlChar *) atts[i]);
}
xmlFree((void *) atts);
}
if (name != NULL) xmlFree(name);
}
/**
* htmlParseEndTag:
* @ctxt: an HTML parser context
*
* parse an end of tag
*
* [42] ETag ::= '</' Name S? '>'
*
* With namespace
*
* [NS 9] ETag ::= '</' QName S? '>'
*/
void
htmlParseEndTag(htmlParserCtxtPtr ctxt) {
xmlChar *name;
xmlChar *oldname;
int i;
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);
if (name == NULL) return;
/*
* 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;
/*
* If the name read is not one of the element in the parsing stack
* then return, it's just an error.
*/
for (i = (ctxt->nameNr - 1);i >= 0;i--) {
if (!xmlStrcmp(name, ctxt->nameTab[i])) break;
}
if (i < 0) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Unexpected end tag : %s\n", name);
xmlFree(name);
ctxt->wellFormed = 0;
return;
}
/*
* Check for auto-closure of HTML elements.
*/
htmlAutoCloseOnClose(ctxt, name);
/*
* Well formedness constraints, opening and closing must match.
* With the exception that the autoclose may have popped stuff out
* of the stack.
*/
if (xmlStrcmp(name, ctxt->name)) {
#ifdef DEBUG
fprintf(stderr,"End of tag %s: expecting %s\n", name, ctxt->name);
#endif
if ((ctxt->name != NULL) &&
(xmlStrcmp(ctxt->name, name))) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Opening and ending tag mismatch: %s and %s\n",
name, ctxt->name);
ctxt->wellFormed = 0;
}
}
/*
* SAX: End of Tag
*/
oldname = ctxt->name;
if ((oldname != NULL) && (!xmlStrcmp(oldname, name))) {
if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL))
ctxt->sax->endElement(ctxt->userData, name);
oldname = htmlnamePop(ctxt);
if (oldname != NULL) {
#ifdef DEBUG
fprintf(stderr,"End of tag %s: popping out %s\n", name, oldname);
#endif
xmlFree(oldname);
#ifdef DEBUG
} else {
fprintf(stderr,"End of tag %s: stack empty !!!\n", name);
#endif
}
}
if (name != NULL)
xmlFree(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) {
htmlEntityDescPtr ent;
xmlChar out[6];
xmlChar *name;
if (CUR != '&') return;
if (NXT(1) == '#') {
unsigned int c;
int bits, i = 0;
c = htmlParseCharRef(ctxt);
if (c < 0x80) { out[i++]= c; bits= -6; }
else if (c < 0x800) { out[i++]=((c >> 6) & 0x1F) | 0xC0; bits= 0; }
else if (c < 0x10000) { out[i++]=((c >> 12) & 0x0F) | 0xE0; bits= 6; }
else { out[i++]=((c >> 18) & 0x07) | 0xF0; bits= 12; }
for ( ; bits >= 0; bits-= 6) {
out[i++]= ((c >> bits) & 0x3F) | 0x80;
}
out[i] = 0;
htmlCheckParagraph(ctxt);
if ((ctxt->sax != NULL) && (ctxt->sax->characters != NULL))
ctxt->sax->characters(ctxt->userData, out, i);
} else {
ent = htmlParseEntityRef(ctxt, &name);
if (name == NULL) {
htmlCheckParagraph(ctxt);
if ((ctxt->sax != NULL) && (ctxt->sax->characters != NULL))
ctxt->sax->characters(ctxt->userData, BAD_CAST "&", 1);
return;
}
if ((ent == NULL) || (ent->value <= 0)) {
htmlCheckParagraph(ctxt);
if ((ctxt->sax != NULL) && (ctxt->sax->characters != NULL)) {
ctxt->sax->characters(ctxt->userData, BAD_CAST "&", 1);
ctxt->sax->characters(ctxt->userData, name, xmlStrlen(name));
/* ctxt->sax->characters(ctxt->userData, BAD_CAST ";", 1); */
}
} else {
unsigned int c;
int bits, i = 0;
c = ent->value;
if (c < 0x80)
{ out[i++]= c; bits= -6; }
else if (c < 0x800)
{ out[i++]=((c >> 6) & 0x1F) | 0xC0; bits= 0; }
else if (c < 0x10000)
{ out[i++]=((c >> 12) & 0x0F) | 0xE0; bits= 6; }
else
{ out[i++]=((c >> 18) & 0x07) | 0xF0; bits= 12; }
for ( ; bits >= 0; bits-= 6) {
out[i++]= ((c >> bits) & 0x3F) | 0x80;
}
out[i] = 0;
htmlCheckParagraph(ctxt);
if ((ctxt->sax != NULL) && (ctxt->sax->characters != NULL))
ctxt->sax->characters(ctxt->userData, out, i);
}
xmlFree(name);
}
}
/**
* htmlParseContent:
* @ctxt: an HTML parser context
* @name: the node name
*
* Parse a content: comment, sub-element, reference or text.
*
*/
void
htmlParseContent(htmlParserCtxtPtr ctxt) {
xmlChar *currentNode;
int depth;
currentNode = xmlStrdup(ctxt->name);
depth = ctxt->nameNr;
while (1) {
long cons = ctxt->nbChars;
GROW;
/*
* Our tag or one of it's parent or children is ending.
*/
if ((CUR == '<') && (NXT(1) == '/')) {
htmlParseEndTag(ctxt);
if (currentNode != NULL) xmlFree(currentNode);
return;
}
/*
* Has this node been popped out during parsing of
* the next element
*/
if ((xmlStrcmp(currentNode, ctxt->name)) &&
(depth >= ctxt->nameNr)) {
if (currentNode != NULL) xmlFree(currentNode);
return;
}
/*
* Sometimes DOCTYPE arrives in the middle of the document
*/
if ((CUR == '<') && (NXT(1) == '!') &&
(UPP(2) == 'D') && (UPP(3) == 'O') &&
(UPP(4) == 'C') && (UPP(5) == 'T') &&
(UPP(6) == 'Y') && (UPP(7) == 'P') &&
(UPP(8) == 'E')) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Misplaced DOCTYPE declaration\n");
ctxt->wellFormed = 0;
htmlParseDocTypeDecl(ctxt);
}
/*
* First case : a comment
*/
if ((CUR == '<') && (NXT(1) == '!') &&
(NXT(2) == '-') && (NXT(3) == '-')) {
htmlParseComment(ctxt);
}
/*
* 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);
}
/*
* Fourth : end of the resource
*/
else if (CUR == 0) {
htmlAutoClose(ctxt, NULL);
}
/*
* Last case, text. Note that References are handled directly.
*/
else {
htmlParseCharData(ctxt, 0);
}
if (cons == ctxt->nbChars) {
if (ctxt->node != NULL) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"detected an error in element content\n");
ctxt->wellFormed = 0;
}
break;
}
GROW;
}
if (currentNode != NULL) xmlFree(currentNode);
}
/**
* 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) {
xmlChar *name;
xmlChar *currentNode = NULL;
htmlElemDescPtr info;
htmlParserNodeInfo node_info;
xmlChar *oldname;
int depth = ctxt->nameNr;
/* Capture start position */
if (ctxt->record_info) {
node_info.begin_pos = ctxt->input->consumed +
(CUR_PTR - ctxt->input->base);
node_info.begin_line = ctxt->input->line;
}
oldname = xmlStrdup(ctxt->name);
htmlParseStartTag(ctxt);
name = ctxt->name;
#ifdef DEBUG
if (oldname == NULL)
fprintf(stderr, "Start of element %s\n", name);
else if (name == NULL)
fprintf(stderr, "Start of element failed, was %s\n", oldname);
else
fprintf(stderr, "Start of element %s, was %s\n", name, oldname);
#endif
if (((depth == ctxt->nameNr) && (!xmlStrcmp(oldname, ctxt->name))) ||
(name == NULL)) {
if (CUR == '>')
NEXT;
if (oldname != NULL)
xmlFree(oldname);
return;
}
if (oldname != NULL)
xmlFree(oldname);
/*
* 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);
oldname = htmlnamePop(ctxt);
#ifdef DEBUG
fprintf(stderr,"End of tag the XML way: popping out %s\n", oldname);
#endif
if (oldname != NULL)
xmlFree(oldname);
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 %s\n",
name);
ctxt->wellFormed = 0;
/*
* end of parsing of this node.
*/
if (!xmlStrcmp(name, ctxt->name)) {
nodePop(ctxt);
oldname = htmlnamePop(ctxt);
#ifdef DEBUG
fprintf(stderr,"End of start tag problem: popping out %s\n", oldname);
#endif
if (oldname != NULL)
xmlFree(oldname);
}
/*
* Capture end position and add node
*/
if ( currentNode != NULL && ctxt->record_info ) {
node_info.end_pos = ctxt->input->consumed +
(CUR_PTR - ctxt->input->base);
node_info.end_line = ctxt->input->line;
node_info.node = ctxt->node;
xmlParserAddNodeInfo(ctxt, &node_info);
}
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);
oldname = htmlnamePop(ctxt);
#ifdef DEBUG
fprintf(stderr,"End of empty tag %s : popping out %s\n", name, oldname);
#endif
if (oldname != NULL)
xmlFree(oldname);
return;
}
/*
* Parse the content of the element:
*/
currentNode = xmlStrdup(ctxt->name);
depth = ctxt->nameNr;
while (IS_CHAR(CUR)) {
htmlParseContent(ctxt);
if (ctxt->nameNr < depth) break;
}
if (!IS_CHAR(CUR)) {
/************
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Premature end of data in tag %s\n", currentNode);
ctxt->wellFormed = 0;
*************/
/*
* end of parsing of this node.
*/
nodePop(ctxt);
oldname = htmlnamePop(ctxt);
#ifdef DEBUG
fprintf(stderr,"Premature end of tag %s : popping out %s\n", name, oldname);
#endif
if (oldname != NULL)
xmlFree(oldname);
if (currentNode != NULL)
xmlFree(currentNode);
return;
}
/*
* Capture end position and add node
*/
if ( currentNode != NULL && ctxt->record_info ) {
node_info.end_pos = ctxt->input->consumed +
(CUR_PTR - ctxt->input->base);
node_info.end_line = ctxt->input->line;
node_info.node = ctxt->node;
xmlParserAddNodeInfo(ctxt, &node_info);
}
if (currentNode != NULL)
xmlFree(currentNode);
}
/**
* 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) {
xmlDtdPtr dtd;
htmlDefaultSAXHandlerInit();
ctxt->html = 1;
GROW;
/*
* SAX: beginning of the document processing.
*/
if ((ctxt->sax) && (ctxt->sax->setDocumentLocator))
ctxt->sax->setDocumentLocator(ctxt->userData, &xmlDefaultSAXLocator);
/*
* Wipe out everything which is before the first '<'
*/
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;
}
if ((ctxt->sax) && (ctxt->sax->startDocument) && (!ctxt->disableSAX))
ctxt->sax->startDocument(ctxt->userData);
/*
* Parse possible comments before any content
*/
while ((CUR == '<') && (NXT(1) == '!') &&
(NXT(2) == '-') && (NXT(3) == '-')) {
htmlParseComment(ctxt);
SKIP_BLANKS;
}
/*
* Then possibly doc type declaration(s) and more Misc
* (doctypedecl Misc*)?
*/
if ((CUR == '<') && (NXT(1) == '!') &&
(UPP(2) == 'D') && (UPP(3) == 'O') &&
(UPP(4) == 'C') && (UPP(5) == 'T') &&
(UPP(6) == 'Y') && (UPP(7) == 'P') &&
(UPP(8) == 'E')) {
htmlParseDocTypeDecl(ctxt);
}
SKIP_BLANKS;
/*
* Parse possible comments before any content
*/
while ((CUR == '<') && (NXT(1) == '!') &&
(NXT(2) == '-') && (NXT(3) == '-')) {
htmlParseComment(ctxt);
SKIP_BLANKS;
}
/*
* Time to start parsing the tree itself
*/
htmlParseContent(ctxt);
/*
* autoclose
*/
if (CUR == 0)
htmlAutoClose(ctxt, NULL);
/*
* SAX: end of the document processing.
*/
if ((ctxt->sax) && (ctxt->sax->endDocument != NULL))
ctxt->sax->endDocument(ctxt->userData);
if (ctxt->myDoc != NULL) {
dtd = xmlGetIntSubset(ctxt->myDoc);
if (dtd == NULL)
ctxt->myDoc->intSubset =
xmlCreateIntSubset(ctxt->myDoc, BAD_CAST "HTML",
BAD_CAST "-//W3C//DTD HTML 4.0 Transitional//EN",
BAD_CAST "http://www.w3.org/TR/REC-html40/loose.dtd");
}
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;
if (ctxt == NULL) return;
memset(ctxt, 0, sizeof(htmlParserCtxt));
sax = (htmlSAXHandler *) xmlMalloc(sizeof(htmlSAXHandler));
if (sax == NULL) {
fprintf(stderr, "htmlInitParserCtxt: out of memory\n");
}
memset(sax, 0, sizeof(htmlSAXHandler));
/* Allocate the Input stack */
ctxt->inputTab = (htmlParserInputPtr *)
xmlMalloc(5 * sizeof(htmlParserInputPtr));
if (ctxt->inputTab == NULL) {
fprintf(stderr, "htmlInitParserCtxt: out of memory\n");
}
ctxt->inputNr = 0;
ctxt->inputMax = 5;
ctxt->input = NULL;
ctxt->version = NULL;
ctxt->encoding = NULL;
ctxt->standalone = -1;
ctxt->instate = XML_PARSER_START;
/* Allocate the Node stack */
ctxt->nodeTab = (htmlNodePtr *) xmlMalloc(10 * sizeof(htmlNodePtr));
ctxt->nodeNr = 0;
ctxt->nodeMax = 10;
ctxt->node = NULL;
/* Allocate the Name stack */
ctxt->nameTab = (xmlChar **) xmlMalloc(10 * sizeof(xmlChar *));
ctxt->nameNr = 0;
ctxt->nameMax = 10;
ctxt->name = 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 = 0;
ctxt->html = 1;
ctxt->record_info = 0;
ctxt->validate = 0;
ctxt->nbChars = 0;
ctxt->checkIndex = 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)
{
xmlFreeParserCtxt(ctxt);
}
/**
* htmlCreateDocParserCtxt :
* @cur: a pointer to an array of xmlChar
* @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(xmlChar *cur, const char *encoding) {
htmlParserCtxtPtr ctxt;
htmlParserInputPtr input;
/* htmlCharEncoding enc; */
ctxt = (htmlParserCtxtPtr) xmlMalloc(sizeof(htmlParserCtxt));
if (ctxt == NULL) {
perror("malloc");
return(NULL);
}
htmlInitParserCtxt(ctxt);
input = (htmlParserInputPtr) xmlMalloc(sizeof(htmlParserInput));
if (input == NULL) {
perror("malloc");
xmlFree(ctxt);
return(NULL);
}
memset(input, 0, sizeof(htmlParserInput));
input->line = 1;
input->col = 1;
input->base = cur;
input->cur = cur;
inputPush(ctxt, input);
return(ctxt);
}
/************************************************************************
* *
* Progressive parsing interfaces *
* *
************************************************************************/
/**
* htmlParseLookupSequence:
* @ctxt: an HTML parser context
* @first: the first char to lookup
* @next: the next char to lookup or zero
* @third: the next char to lookup or zero
*
* Try to find if a sequence (first, next, third) or just (first next) or
* (first) is available in the input stream.
* This function has a side effect of (possibly) incrementing ctxt->checkIndex
* to avoid rescanning sequences of bytes, it DOES change the state of the
* parser, do not use liberally.
* This is basically similar to xmlParseLookupSequence()
*
* Returns the index to the current parsing point if the full sequence
* is available, -1 otherwise.
*/
int
htmlParseLookupSequence(htmlParserCtxtPtr ctxt, xmlChar first,
xmlChar next, xmlChar third) {
int base, len;
htmlParserInputPtr in;
const xmlChar *buf;
in = ctxt->input;
if (in == NULL) return(-1);
base = in->cur - in->base;
if (base < 0) return(-1);
if (ctxt->checkIndex > base)
base = ctxt->checkIndex;
if (in->buf == NULL) {
buf = in->base;
len = in->length;
} else {
buf = in->buf->buffer->content;
len = in->buf->buffer->use;
}
/* take into account the sequence length */
if (third) len -= 2;
else if (next) len --;
for (;base < len;base++) {
if (buf[base] == first) {
if (third != 0) {
if ((buf[base + 1] != next) ||
(buf[base + 2] != third)) continue;
} else if (next != 0) {
if (buf[base + 1] != next) continue;
}
ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
if (next == 0)
fprintf(stderr, "HPP: lookup '%c' found at %d\n",
first, base);
else if (third == 0)
fprintf(stderr, "HPP: lookup '%c%c' found at %d\n",
first, next, base);
else
fprintf(stderr, "HPP: lookup '%c%c%c' found at %d\n",
first, next, third, base);
#endif
return(base - (in->cur - in->base));
}
}
ctxt->checkIndex = base;
#ifdef DEBUG_PUSH
if (next == 0)
fprintf(stderr, "HPP: lookup '%c' failed\n", first);
else if (third == 0)
fprintf(stderr, "HPP: lookup '%c%c' failed\n", first, next);
else
fprintf(stderr, "HPP: lookup '%c%c%c' failed\n", first, next, third);
#endif
return(-1);
}
/**
* htmlParseTryOrFinish:
* @ctxt: an HTML parser context
* @terminate: last chunk indicator
*
* Try to progress on parsing
*
* Returns zero if no parsing was possible
*/
int
htmlParseTryOrFinish(htmlParserCtxtPtr ctxt, int terminate) {
int ret = 0;
htmlParserInputPtr in;
int avail = 0;
xmlChar cur, next;
#ifdef DEBUG_PUSH
switch (ctxt->instate) {
case XML_PARSER_EOF:
fprintf(stderr, "HPP: try EOF\n"); break;
case XML_PARSER_START:
fprintf(stderr, "HPP: try START\n"); break;
case XML_PARSER_MISC:
fprintf(stderr, "HPP: try MISC\n");break;
case XML_PARSER_COMMENT:
fprintf(stderr, "HPP: try COMMENT\n");break;
case XML_PARSER_PROLOG:
fprintf(stderr, "HPP: try PROLOG\n");break;
case XML_PARSER_START_TAG:
fprintf(stderr, "HPP: try START_TAG\n");break;
case XML_PARSER_CONTENT:
fprintf(stderr, "HPP: try CONTENT\n");break;
case XML_PARSER_CDATA_SECTION:
fprintf(stderr, "HPP: try CDATA_SECTION\n");break;
case XML_PARSER_END_TAG:
fprintf(stderr, "HPP: try END_TAG\n");break;
case XML_PARSER_ENTITY_DECL:
fprintf(stderr, "HPP: try ENTITY_DECL\n");break;
case XML_PARSER_ENTITY_VALUE:
fprintf(stderr, "HPP: try ENTITY_VALUE\n");break;
case XML_PARSER_ATTRIBUTE_VALUE:
fprintf(stderr, "HPP: try ATTRIBUTE_VALUE\n");break;
case XML_PARSER_DTD:
fprintf(stderr, "HPP: try DTD\n");break;
case XML_PARSER_EPILOG:
fprintf(stderr, "HPP: try EPILOG\n");break;
case XML_PARSER_PI:
fprintf(stderr, "HPP: try PI\n");break;
}
#endif
while (1) {
in = ctxt->input;
if (in == NULL) break;
if (in->buf == NULL)
avail = in->length - (in->cur - in->base);
else
avail = in->buf->buffer->use - (in->cur - in->base);
if ((avail == 0) && (terminate)) {
htmlAutoClose(ctxt, NULL);
if ((ctxt->nameNr == 0) && (ctxt->instate != XML_PARSER_EOF)) {
/*
* SAX: end of the document processing.
*/
ctxt->instate = XML_PARSER_EOF;
if ((ctxt->sax) && (ctxt->sax->endDocument != NULL))
ctxt->sax->endDocument(ctxt->userData);
}
}
if (avail < 1)
goto done;
switch (ctxt->instate) {
case XML_PARSER_EOF:
/*
* Document parsing is done !
*/
goto done;
case XML_PARSER_START:
/*
* Very first chars read from the document flow.
*/
cur = in->cur[0];
if (IS_BLANK(cur)) {
SKIP_BLANKS;
if (in->buf == NULL)
avail = in->length - (in->cur - in->base);
else
avail = in->buf->buffer->use - (in->cur - in->base);
}
if ((ctxt->sax) && (ctxt->sax->setDocumentLocator))
ctxt->sax->setDocumentLocator(ctxt->userData,
&xmlDefaultSAXLocator);
if ((ctxt->sax) && (ctxt->sax->startDocument) &&
(!ctxt->disableSAX))
ctxt->sax->startDocument(ctxt->userData);
cur = in->cur[0];
next = in->cur[1];
if ((cur == '<') && (next == '!') &&
(UPP(2) == 'D') && (UPP(3) == 'O') &&
(UPP(4) == 'C') && (UPP(5) == 'T') &&
(UPP(6) == 'Y') && (UPP(7) == 'P') &&
(UPP(8) == 'E')) {
if ((!terminate) &&
(htmlParseLookupSequence(ctxt, '>', 0, 0) < 0))
goto done;
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: Parsing internal subset\n");
#endif
htmlParseDocTypeDecl(ctxt);
ctxt->instate = XML_PARSER_PROLOG;
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: entering PROLOG\n");
#endif
} else {
ctxt->instate = XML_PARSER_MISC;
}
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: entering MISC\n");
#endif
break;
case XML_PARSER_MISC:
SKIP_BLANKS;
if (in->buf == NULL)
avail = in->length - (in->cur - in->base);
else
avail = in->buf->buffer->use - (in->cur - in->base);
if (avail < 2)
goto done;
cur = in->cur[0];
next = in->cur[1];
if ((cur == '<') && (next == '!') &&
(in->cur[2] == '-') && (in->cur[3] == '-')) {
if ((!terminate) &&
(htmlParseLookupSequence(ctxt, '-', '-', '>') < 0))
goto done;
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: Parsing Comment\n");
#endif
htmlParseComment(ctxt);
ctxt->instate = XML_PARSER_MISC;
} else if ((cur == '<') && (next == '!') &&
(UPP(2) == 'D') && (UPP(3) == 'O') &&
(UPP(4) == 'C') && (UPP(5) == 'T') &&
(UPP(6) == 'Y') && (UPP(7) == 'P') &&
(UPP(8) == 'E')) {
if ((!terminate) &&
(htmlParseLookupSequence(ctxt, '>', 0, 0) < 0))
goto done;
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: Parsing internal subset\n");
#endif
htmlParseDocTypeDecl(ctxt);
ctxt->instate = XML_PARSER_PROLOG;
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: entering PROLOG\n");
#endif
} else if ((cur == '<') && (next == '!') &&
(avail < 9)) {
goto done;
} else {
ctxt->instate = XML_PARSER_START_TAG;
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: entering START_TAG\n");
#endif
}
break;
case XML_PARSER_PROLOG:
SKIP_BLANKS;
if (in->buf == NULL)
avail = in->length - (in->cur - in->base);
else
avail = in->buf->buffer->use - (in->cur - in->base);
if (avail < 2)
goto done;
cur = in->cur[0];
next = in->cur[1];
if ((cur == '<') && (next == '!') &&
(in->cur[2] == '-') && (in->cur[3] == '-')) {
if ((!terminate) &&
(htmlParseLookupSequence(ctxt, '-', '-', '>') < 0))
goto done;
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: Parsing Comment\n");
#endif
htmlParseComment(ctxt);
ctxt->instate = XML_PARSER_PROLOG;
} else if ((cur == '<') && (next == '!') &&
(avail < 4)) {
goto done;
} else {
ctxt->instate = XML_PARSER_START_TAG;
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: entering START_TAG\n");
#endif
}
break;
case XML_PARSER_EPILOG:
if (in->buf == NULL)
avail = in->length - (in->cur - in->base);
else
avail = in->buf->buffer->use - (in->cur - in->base);
if (avail < 1)
goto done;
cur = in->cur[0];
if (IS_BLANK(cur)) {
htmlParseCharData(ctxt, 0);
goto done;
}
if (avail < 2)
goto done;
next = in->cur[1];
if ((cur == '<') && (next == '!') &&
(in->cur[2] == '-') && (in->cur[3] == '-')) {
if ((!terminate) &&
(htmlParseLookupSequence(ctxt, '-', '-', '>') < 0))
goto done;
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: Parsing Comment\n");
#endif
htmlParseComment(ctxt);
ctxt->instate = XML_PARSER_EPILOG;
} else if ((cur == '<') && (next == '!') &&
(avail < 4)) {
goto done;
} else {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Extra content at the end of the document\n");
ctxt->wellFormed = 0;
ctxt->errNo = XML_ERR_DOCUMENT_END;
ctxt->instate = XML_PARSER_EOF;
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: entering EOF\n");
#endif
if ((ctxt->sax) && (ctxt->sax->endDocument != NULL))
ctxt->sax->endDocument(ctxt->userData);
goto done;
}
break;
case XML_PARSER_START_TAG: {
xmlChar *name, *oldname;
int depth = ctxt->nameNr;
htmlElemDescPtr info;
if (avail < 2)
goto done;
cur = in->cur[0];
if (cur != '<') {
ctxt->instate = XML_PARSER_CONTENT;
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: entering CONTENT\n");
#endif
break;
}
if ((!terminate) &&
(htmlParseLookupSequence(ctxt, '>', 0, 0) < 0))
goto done;
oldname = xmlStrdup(ctxt->name);
htmlParseStartTag(ctxt);
name = ctxt->name;
#ifdef DEBUG
if (oldname == NULL)
fprintf(stderr, "Start of element %s\n", name);
else if (name == NULL)
fprintf(stderr, "Start of element failed, was %s\n",
oldname);
else
fprintf(stderr, "Start of element %s, was %s\n",
name, oldname);
#endif
if (((depth == ctxt->nameNr) &&
(!xmlStrcmp(oldname, ctxt->name))) ||
(name == NULL)) {
if (CUR == '>')
NEXT;
if (oldname != NULL)
xmlFree(oldname);
break;
}
if (oldname != NULL)
xmlFree(oldname);
/*
* 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);
oldname = htmlnamePop(ctxt);
#ifdef DEBUG
fprintf(stderr,"End of tag the XML way: popping out %s\n",
oldname);
#endif
if (oldname != NULL)
xmlFree(oldname);
ctxt->instate = XML_PARSER_CONTENT;
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: entering CONTENT\n");
#endif
break;
}
if (CUR == '>') {
NEXT;
} else {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Couldn't find end of Start Tag %s\n",
name);
ctxt->wellFormed = 0;
/*
* end of parsing of this node.
*/
if (!xmlStrcmp(name, ctxt->name)) {
nodePop(ctxt);
oldname = htmlnamePop(ctxt);
#ifdef DEBUG
fprintf(stderr,
"End of start tag problem: popping out %s\n", oldname);
#endif
if (oldname != NULL)
xmlFree(oldname);
}
ctxt->instate = XML_PARSER_CONTENT;
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: entering CONTENT\n");
#endif
break;
}
/*
* 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);
oldname = htmlnamePop(ctxt);
#ifdef DEBUG
fprintf(stderr,"End of empty tag %s : popping out %s\n", name, oldname);
#endif
if (oldname != NULL)
xmlFree(oldname);
}
ctxt->instate = XML_PARSER_CONTENT;
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: entering CONTENT\n");
#endif
break;
}
case XML_PARSER_CONTENT: {
long cons;
/*
* Handle preparsed entities and charRef
*/
if (ctxt->token != 0) {
xmlChar chr[2] = { 0 , 0 } ;
chr[0] = (xmlChar) ctxt->token;
htmlCheckParagraph(ctxt);
if ((ctxt->sax != NULL) && (ctxt->sax->characters != NULL))
ctxt->sax->characters(ctxt->userData, chr, 1);
ctxt->token = 0;
ctxt->checkIndex = 0;
}
if ((avail == 1) && (terminate)) {
cur = in->cur[0];
if ((cur != '<') && (cur != '&')) {
if (ctxt->sax != NULL) {
if (IS_BLANK(cur)) {
if (ctxt->sax->ignorableWhitespace != NULL)
ctxt->sax->ignorableWhitespace(
ctxt->userData, &cur, 1);
} else {
htmlCheckParagraph(ctxt);
if (ctxt->sax->characters != NULL)
ctxt->sax->characters(
ctxt->userData, &cur, 1);
}
}
ctxt->token = 0;
ctxt->checkIndex = 0;
NEXT;
}
break;
}
if (avail < 2)
goto done;
cur = in->cur[0];
next = in->cur[1];
cons = ctxt->nbChars;
/*
* Sometimes DOCTYPE arrives in the middle of the document
*/
if ((cur == '<') && (next == '!') &&
(UPP(2) == 'D') && (UPP(3) == 'O') &&
(UPP(4) == 'C') && (UPP(5) == 'T') &&
(UPP(6) == 'Y') && (UPP(7) == 'P') &&
(UPP(8) == 'E')) {
if ((!terminate) &&
(htmlParseLookupSequence(ctxt, '>', 0, 0) < 0))
goto done;
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Misplaced DOCTYPE declaration\n");
ctxt->wellFormed = 0;
htmlParseDocTypeDecl(ctxt);
} else if ((cur == '<') && (next == '!') &&
(in->cur[2] == '-') && (in->cur[3] == '-')) {
if ((!terminate) &&
(htmlParseLookupSequence(ctxt, '-', '-', '>') < 0))
goto done;
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: Parsing Comment\n");
#endif
htmlParseComment(ctxt);
ctxt->instate = XML_PARSER_CONTENT;
} else if ((cur == '<') && (next == '!') && (avail < 4)) {
goto done;
} else if ((cur == '<') && (next == '/')) {
ctxt->instate = XML_PARSER_END_TAG;
ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: entering END_TAG\n");
#endif
break;
} else if (cur == '<') {
ctxt->instate = XML_PARSER_START_TAG;
ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: entering START_TAG\n");
#endif
break;
} else if (cur == '&') {
if ((!terminate) &&
(htmlParseLookupSequence(ctxt, ';', 0, 0) < 0))
goto done;
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: Parsing Reference\n");
#endif
/* TODO: check generation of subtrees if noent !!! */
htmlParseReference(ctxt);
} else {
/* TODO Avoid the extra copy, handle directly !!!!!! */
/*
* Goal of the following test is :
* - minimize calls to the SAX 'character' callback
* when they are mergeable
*/
if ((ctxt->inputNr == 1) &&
(avail < HTML_PARSER_BIG_BUFFER_SIZE)) {
if ((!terminate) &&
(htmlParseLookupSequence(ctxt, '<', 0, 0) < 0))
goto done;
}
ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: Parsing char data\n");
#endif
htmlParseCharData(ctxt, 0);
}
if (cons == ctxt->nbChars) {
if (ctxt->node != NULL) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"detected an error in element content\n");
ctxt->wellFormed = 0;
NEXT;
}
break;
}
break;
}
case XML_PARSER_END_TAG:
if (avail < 2)
goto done;
if ((!terminate) &&
(htmlParseLookupSequence(ctxt, '>', 0, 0) < 0))
goto done;
htmlParseEndTag(ctxt);
if (ctxt->nameNr == 0) {
ctxt->instate = XML_PARSER_EPILOG;
} else {
ctxt->instate = XML_PARSER_CONTENT;
}
ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: entering CONTENT\n");
#endif
break;
case XML_PARSER_CDATA_SECTION:
fprintf(stderr, "HPP: internal error, state == CDATA\n");
ctxt->instate = XML_PARSER_CONTENT;
ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: entering CONTENT\n");
#endif
break;
case XML_PARSER_DTD:
fprintf(stderr, "HPP: internal error, state == DTD\n");
ctxt->instate = XML_PARSER_CONTENT;
ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: entering CONTENT\n");
#endif
break;
case XML_PARSER_COMMENT:
fprintf(stderr, "HPP: internal error, state == COMMENT\n");
ctxt->instate = XML_PARSER_CONTENT;
ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: entering CONTENT\n");
#endif
break;
case XML_PARSER_PI:
fprintf(stderr, "HPP: internal error, state == PI\n");
ctxt->instate = XML_PARSER_CONTENT;
ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: entering CONTENT\n");
#endif
break;
case XML_PARSER_ENTITY_DECL:
fprintf(stderr, "HPP: internal error, state == ENTITY_DECL\n");
ctxt->instate = XML_PARSER_CONTENT;
ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: entering CONTENT\n");
#endif
break;
case XML_PARSER_ENTITY_VALUE:
fprintf(stderr, "HPP: internal error, state == ENTITY_VALUE\n");
ctxt->instate = XML_PARSER_CONTENT;
ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: entering DTD\n");
#endif
break;
case XML_PARSER_ATTRIBUTE_VALUE:
fprintf(stderr, "HPP: internal error, state == ATTRIBUTE_VALUE\n");
ctxt->instate = XML_PARSER_START_TAG;
ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: entering START_TAG\n");
#endif
break;
case XML_PARSER_SYSTEM_LITERAL:
fprintf(stderr, "HPP: internal error, state == XML_PARSER_SYSTEM_LITERAL\n");
ctxt->instate = XML_PARSER_CONTENT;
ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: entering CONTENT\n");
#endif
break;
}
}
done:
if ((avail == 0) && (terminate)) {
htmlAutoClose(ctxt, NULL);
if ((ctxt->nameNr == 0) && (ctxt->instate != XML_PARSER_EOF)) {
/*
* SAX: end of the document processing.
*/
ctxt->instate = XML_PARSER_EOF;
if ((ctxt->sax) && (ctxt->sax->endDocument != NULL))
ctxt->sax->endDocument(ctxt->userData);
}
}
if ((ctxt->myDoc != NULL) &&
((terminate) || (ctxt->instate == XML_PARSER_EOF) ||
(ctxt->instate == XML_PARSER_EPILOG))) {
xmlDtdPtr dtd;
dtd = xmlGetIntSubset(ctxt->myDoc);
if (dtd == NULL)
ctxt->myDoc->intSubset =
xmlCreateIntSubset(ctxt->myDoc, BAD_CAST "HTML",
BAD_CAST "-//W3C//DTD HTML 4.0 Transitional//EN",
BAD_CAST "http://www.w3.org/TR/REC-html40/loose.dtd");
}
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: done %d\n", ret);
#endif
return(ret);
}
/**
* htmlParseTry:
* @ctxt: an HTML parser context
*
* Try to progress on parsing
*
* Returns zero if no parsing was possible
*/
int
htmlParseTry(htmlParserCtxtPtr ctxt) {
return(htmlParseTryOrFinish(ctxt, 0));
}
/**
* htmlParseChunk:
* @ctxt: an XML parser context
* @chunk: an char array
* @size: the size in byte of the chunk
* @terminate: last chunk indicator
*
* Parse a Chunk of memory
*
* Returns zero if no error, the xmlParserErrors otherwise.
*/
int
htmlParseChunk(htmlParserCtxtPtr ctxt, const char *chunk, int size,
int terminate) {
if ((size > 0) && (chunk != NULL) && (ctxt->input != NULL) &&
(ctxt->input->buf != NULL) && (ctxt->instate != XML_PARSER_EOF)) {
int base = ctxt->input->base - ctxt->input->buf->buffer->content;
int cur = ctxt->input->cur - ctxt->input->base;
xmlParserInputBufferPush(ctxt->input->buf, size, chunk);
ctxt->input->base = ctxt->input->buf->buffer->content + base;
ctxt->input->cur = ctxt->input->base + cur;
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: pushed %d\n", size);
#endif
if ((terminate) || (ctxt->input->buf->buffer->use > 80))
htmlParseTryOrFinish(ctxt, terminate);
} else if (ctxt->instate != XML_PARSER_EOF) {
xmlParserInputBufferPush(ctxt->input->buf, 0, "");
htmlParseTryOrFinish(ctxt, terminate);
}
if (terminate) {
if ((ctxt->instate != XML_PARSER_EOF) &&
(ctxt->instate != XML_PARSER_EPILOG) &&
(ctxt->instate != XML_PARSER_MISC)) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Extra content at the end of the document\n");
ctxt->wellFormed = 0;
ctxt->errNo = XML_ERR_DOCUMENT_END;
}
if (ctxt->instate != XML_PARSER_EOF) {
if ((ctxt->sax) && (ctxt->sax->endDocument != NULL))
ctxt->sax->endDocument(ctxt->userData);
}
ctxt->instate = XML_PARSER_EOF;
}
return((xmlParserErrors) ctxt->errNo);
}
/************************************************************************
* *
* User entry points *
* *
************************************************************************/
/**
* htmlCreatePushParserCtxt :
* @sax: a SAX handler
* @user_data: The user data returned on SAX callbacks
* @chunk: a pointer to an array of chars
* @size: number of chars in the array
* @filename: an optional file name or URI
* @enc: an optional encoding
*
* Create a parser context for using the HTML parser in push mode
* To allow content encoding detection, @size should be >= 4
* The value of @filename is used for fetching external entities
* and error/warning reports.
*
* Returns the new parser context or NULL
*/
htmlParserCtxtPtr
htmlCreatePushParserCtxt(htmlSAXHandlerPtr sax, void *user_data,
const char *chunk, int size, const char *filename,
xmlCharEncoding enc) {
htmlParserCtxtPtr ctxt;
htmlParserInputPtr inputStream;
xmlParserInputBufferPtr buf;
buf = xmlAllocParserInputBuffer(enc);
if (buf == NULL) return(NULL);
ctxt = (htmlParserCtxtPtr) xmlMalloc(sizeof(htmlParserCtxt));
if (ctxt == NULL) {
xmlFree(buf);
return(NULL);
}
memset(ctxt, 0, sizeof(htmlParserCtxt));
htmlInitParserCtxt(ctxt);
if (sax != NULL) {
if (ctxt->sax != &htmlDefaultSAXHandler)
xmlFree(ctxt->sax);
ctxt->sax = (htmlSAXHandlerPtr) xmlMalloc(sizeof(htmlSAXHandler));
if (ctxt->sax == NULL) {
xmlFree(buf);
xmlFree(ctxt);
return(NULL);
}
memcpy(ctxt->sax, sax, sizeof(htmlSAXHandler));
if (user_data != NULL)
ctxt->userData = user_data;
}
if (filename == NULL) {
ctxt->directory = NULL;
} else {
ctxt->directory = xmlParserGetDirectory(filename);
}
inputStream = htmlNewInputStream(ctxt);
if (inputStream == NULL) {
xmlFreeParserCtxt(ctxt);
return(NULL);
}
if (filename == NULL)
inputStream->filename = NULL;
else
inputStream->filename = xmlMemStrdup(filename);
inputStream->buf = buf;
inputStream->base = inputStream->buf->buffer->content;
inputStream->cur = inputStream->buf->buffer->content;
inputPush(ctxt, inputStream);
if ((size > 0) && (chunk != NULL) && (ctxt->input != NULL) &&
(ctxt->input->buf != NULL)) {
xmlParserInputBufferPush(ctxt->input->buf, size, chunk);
#ifdef DEBUG_PUSH
fprintf(stderr, "HPP: pushed %d\n", size);
#endif
}
return(ctxt);
}
/**
* htmlSAXParseDoc :
* @cur: a pointer to an array of xmlChar
* @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(xmlChar *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 xmlChar
* @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(xmlChar *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;
htmlParserInputPtr inputStream;
xmlParserInputBufferPtr buf;
/* htmlCharEncoding enc; */
buf = xmlParserInputBufferCreateFilename(filename, XML_CHAR_ENCODING_NONE);
if (buf == NULL) return(NULL);
ctxt = (htmlParserCtxtPtr) xmlMalloc(sizeof(htmlParserCtxt));
if (ctxt == NULL) {
perror("malloc");
return(NULL);
}
memset(ctxt, 0, sizeof(htmlParserCtxt));
htmlInitParserCtxt(ctxt);
inputStream = (htmlParserInputPtr) xmlMalloc(sizeof(htmlParserInput));
if (inputStream == NULL) {
perror("malloc");
xmlFree(ctxt);
return(NULL);
}
memset(inputStream, 0, sizeof(htmlParserInput));
inputStream->filename = xmlMemStrdup(filename);
inputStream->line = 1;
inputStream->col = 1;
inputStream->buf = buf;
inputStream->directory = NULL;
inputStream->base = inputStream->buf->buffer->content;
inputStream->cur = inputStream->buf->buffer->content;
inputStream->free = NULL;
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;
htmlSAXHandlerPtr oldsax = NULL;
ctxt = htmlCreateFileParserCtxt(filename, encoding);
if (ctxt == NULL) return(NULL);
if (sax != NULL) {
oldsax = ctxt->sax;
ctxt->sax = sax;
ctxt->userData = userData;
}
htmlParseDocument(ctxt);
ret = ctxt->myDoc;
if (sax != NULL) {
ctxt->sax = oldsax;
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));
}
#endif /* LIBXML_HTML_ENABLED */
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