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libxml2/HTMLparser.c
Daniel Veillard b96e643849 Release 1.6, lot of fixes, more validation, code cleanup, added namespace 
on attributes, Daniel.
1999-08-29 21:02:19 +00:00

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/*
* HTMLparser.c : an HTML 4.0 non-verifying parser
*
* See Copyright for the status of this software.
*
* Daniel.Veillard@w3.org
*/
#ifdef WIN32
#define HAVE_FCNTL_H
#include <io.h>
#else
#include <config.h>
#endif
#include <stdio.h>
#include <ctype.h>
#include <string.h> /* for memset() only */
#include <stdlib.h>
#include <sys/stat.h>
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_ZLIB_H
#include <zlib.h>
#endif
#include "tree.h"
#include "HTMLparser.h"
#include "entities.h"
#include "encoding.h"
#include "valid.h"
#include "parserInternals.h"
#include "xmlIO.h"
#define HTML_MAX_NAMELEN 1000
#define INPUT_CHUNK 50
/* #define DEBUG */
/************************************************************************
* *
* Parser stacks related functions and macros *
* *
************************************************************************/
/*
* Generic function for accessing stacks in the Parser Context
*/
#define PUSH_AND_POP(type, name) \
int html##name##Push(htmlParserCtxtPtr ctxt, type value) { \
if (ctxt->name##Nr >= ctxt->name##Max) { \
ctxt->name##Max *= 2; \
ctxt->name##Tab = (void *) realloc(ctxt->name##Tab, \
ctxt->name##Max * sizeof(ctxt->name##Tab[0])); \
if (ctxt->name##Tab == NULL) { \
fprintf(stderr, "realloc failed !\n"); \
exit(1); \
} \
} \
ctxt->name##Tab[ctxt->name##Nr] = value; \
ctxt->name = value; \
return(ctxt->name##Nr++); \
} \
type html##name##Pop(htmlParserCtxtPtr ctxt) { \
type ret; \
if (ctxt->name##Nr <= 0) return(0); \
ctxt->name##Nr--; \
if (ctxt->name##Nr > 0) \
ctxt->name = ctxt->name##Tab[ctxt->name##Nr - 1]; \
else \
ctxt->name = NULL; \
ret = ctxt->name##Tab[ctxt->name##Nr]; \
ctxt->name##Tab[ctxt->name##Nr] = 0; \
return(ret); \
} \
PUSH_AND_POP(xmlNodePtr, node)
/*
* Macros for accessing the content. Those should be used only by the parser,
* and not exported.
*
* Dirty macros, i.e. one need to make assumption on the context to use them
*
* CUR_PTR return the current pointer to the CHAR to be parsed.
* CUR returns the current CHAR value, i.e. a 8 bit value if compiled
* in ISO-Latin or UTF-8, and the current 16 bit value if compiled
* in UNICODE mode. This should be used internally by the parser
* only to compare to ASCII values otherwise it would break when
* running with UTF-8 encoding.
* NXT(n) returns the n'th next CHAR. Same as CUR is should be used only
* to compare on ASCII based substring.
* UPP(n) returns the n'th next CHAR converted to uppercase. Same as CUR
* it should be used only to compare on ASCII based substring.
* SKIP(n) Skip n CHAR, and must also be used only to skip ASCII defined
* strings within the parser.
*
* Clean macros, not dependent of an ASCII context, expect UTF-8 encoding
*
* CURRENT Returns the current char value, with the full decoding of
* UTF-8 if we are using this mode. It returns an int.
* NEXT Skip to the next character, this does the proper decoding
* in UTF-8 mode. It also pop-up unfinished entities on the fly.
* COPY(to) copy one char to *to, increment CUR_PTR and to accordingly
*/
#define CUR (*ctxt->input->cur)
#define UPPER (toupper(*ctxt->input->cur))
#define SKIP(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 SKIP_BLANKS \
while (IS_BLANK(*(ctxt->input->cur))) NEXT
#ifndef USE_UTF_8
#define CURRENT (*ctxt->input->cur)
#define NEXT { \
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++; \
if (*ctxt->input->cur == 0) \
xmlParserInputGrow(ctxt->input, INPUT_CHUNK); \
}}
/****************************************
#define NEXT ((*ctxt->input->cur) ? \
(((*(ctxt->input->cur) == '\n') ? \
(ctxt->input->line++, ctxt->input->col = 1) : \
(ctxt->input->col++)), \
(ctxt->input->cur++), \
((*ctxt->input->cur) ? \
(xmlParserInputGrow(ctxt->input, 100), \
ctxt->input->cur): \
(ctxt->input->cur))) : \
((xmlParserInputGrow(ctxt->input, 100) > 0) ? \
ctxt->input->cur: \
(xmlPopInput(ctxt), ctxt->input->cur)))
****************************************/
#else
#endif
/************************************************************************
* *
* 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, "&#160;" },
{ "TBODY", 1, 1, 0, 0, 0, "table body " },
{ "TD", 0, 1, 0, 0, 0, "table data cell" },
{ "TEXTAREA", 0, 0, 0, 0, 0, "multi-line text field " },
{ "TFOOT", 0, 1, 0, 0, 0, "table footer " },
{ "TH", 0, 1, 0, 0, 0, "table header cell" },
{ "THEAD", 0, 1, 0, 0, 0, "table header " },
{ "TITLE", 0, 0, 0, 0, 0, "document title " },
{ "TR", 0, 1, 0, 0, 0, "table row " },
{ "TT", 0, 0, 0, 0, 0, "teletype or monospaced text style" },
{ "U", 0, 0, 0, 1, 1, "underlined text style" },
{ "UL", 0, 0, 0, 0, 0, "unordered list " },
{ "VAR", 0, 0, 0, 0, 0, "instance of a variable or program argument" },
};
/*
* start tags that imply the end of a current element
* any tag of each line implies the end of the current element if the type of
* that element is in the same line
*/
char *htmlEquEnd[] = {
"DT", "DD", "LI", "OPTION", NULL,
"H1", "H2", "H3", "H4", "H5", "H6", NULL,
"OL", "MENU", "DIR", "ADDRESS", "PRE", "LISTING", "XMP", NULL,
NULL
};
/*
* acording the HTML DTD, HR should be added to the 2nd line above, as it
* is not allowed within a H1, H2, H3, etc. But we should tolerate that case
* because many documents contain rules in headings...
*/
/*
* start tags that imply the end of current element
*/
char *htmlStartClose[] = {
"FORM", "FORM", "P", "HR", "H1", "H2", "H3", "H4", "H5", "H6",
"DL", "UL", "OL", "MENU", "DIR", "ADDRESS", "PRE",
"LISTING", "XMP", "HEAD", NULL,
"HEAD", "P", NULL,
"TITLE", "P", NULL,
"BODY", "HEAD", "STYLE", "LINK", "TITLE", "P", NULL,
"LI", "P", "H1", "H2", "H3", "H4", "H5", "H6", "DL", "ADDRESS",
"PRE", "LISTING", "XMP", "HEAD", NULL,
"HR", "P", "HEAD", NULL,
"H1", "P", "HEAD", NULL,
"H2", "P", "HEAD", NULL,
"H3", "P", "HEAD", NULL,
"H4", "P", "HEAD", NULL,
"H5", "P", "HEAD", NULL,
"H6", "P", "HEAD", NULL,
"DIR", "P", "HEAD", NULL,
"ADDRESS", "P", "HEAD", "UL", NULL,
"PRE", "P", "HEAD", "UL", NULL,
"LISTING", "P", "HEAD", NULL,
"XMP", "P", "HEAD", NULL,
"BLOCKQUOTE", "P", "HEAD", NULL,
"DL", "P", "DT", "MENU", "DIR", "ADDRESS", "PRE", "LISTING",
"XMP", "HEAD", NULL,
"DT", "P", "MENU", "DIR", "ADDRESS", "PRE", "LISTING", "XMP", "HEAD", NULL,
"DD", "P", "MENU", "DIR", "ADDRESS", "PRE", "LISTING", "XMP", "HEAD", NULL,
"UL", "P", "HEAD", "OL", "MENU", "DIR", "ADDRESS", "PRE",
"LISTING", "XMP", NULL,
"OL", "P", "HEAD", "UL", NULL,
"MENU", "P", "HEAD", "UL", NULL,
"P", "P", "HEAD", "H1", "H2", "H3", "H4", "H5", "H6", NULL,
"DIV", "P", "HEAD", NULL,
"NOSCRIPT", "P", "HEAD", NULL,
"CENTER", "FONT", "B", "I", "P", "HEAD", NULL,
"A", "A", NULL,
"CAPTION", "P", NULL,
"COLGROUP", "CAPTION", "COLGROUP", "COL", "P", NULL,
"COL", "CAPTION", "COL", "P", NULL,
"TABLE", "P", "HEAD", "H1", "H2", "H3", "H4", "H5", "H6", "PRE",
"LISTING", "XMP", "A", NULL,
"TH", "TH", "TD", NULL,
"TD", "TH", "TD", NULL,
"TR", "TH", "TD", "TR", "CAPTION", "COL", "COLGROUP", NULL,
"THEAD", "CAPTION", "COL", "COLGROUP", NULL,
"TFOOT", "TH", "TD", "TR", "CAPTION", "COL", "COLGROUP", "THEAD",
"TBODY", NULL,
"TBODY", "TH", "TD", "TR", "CAPTION", "COL", "COLGROUP", "THEAD",
"TFOOT", "TBODY", NULL,
"OPTGROUP", "OPTION", NULL,
"FIELDSET", "LEGEND", "P", "HEAD", "H1", "H2", "H3", "H4", "H5", "H6",
"PRE", "LISTING", "XMP", "A", NULL,
NULL
};
static char** htmlStartCloseIndex[100];
static int htmlStartCloseIndexinitialized = 0;
/************************************************************************
* *
* functions to handle HTML specific data *
* *
************************************************************************/
/**
* htmlInitAutoClose:
*
* Initialize the htmlStartCloseIndex for fast lookup of closing tags names.
*
*/
void
htmlInitAutoClose(void) {
int index, i = 0;
if (htmlStartCloseIndexinitialized) return;
for (index = 0;index < 100;index ++) htmlStartCloseIndex[index] = NULL;
index = 0;
while ((htmlStartClose[i] != NULL) && (index < 100 - 1)) {
htmlStartCloseIndex[index++] = &htmlStartClose[i];
while (htmlStartClose[i] != NULL) i++;
i++;
}
}
/**
* htmlTagLookup:
* @tag: The tag name
*
* Lookup the HTML tag in the ElementTable
*
* Returns the related htmlElemDescPtr or NULL if not found.
*/
htmlElemDescPtr
htmlTagLookup(const CHAR *tag) {
int i = 0;
for (i = 0; i < (sizeof(html40ElementTable) /
sizeof(html40ElementTable[0]));i++) {
if (!xmlStrcmp(tag, BAD_CAST html40ElementTable[i].name))
return(&html40ElementTable[i]);
}
return(NULL);
}
/**
* htmlCheckAutoClose:
* @new: The new tag name
* @old: The old tag name
*
* Checks wether the new tag is one of the registered valid tags for closing old.
* Initialize the htmlStartCloseIndex for fast lookup of closing tags names.
*
* Returns 0 if no, 1 if yes.
*/
int
htmlCheckAutoClose(const CHAR *new, const CHAR *old) {
int i, index;
char **close;
if (htmlStartCloseIndexinitialized == 0) htmlInitAutoClose();
/* inefficient, but not a big deal */
for (index = 0; index < 100;index++) {
close = htmlStartCloseIndex[index];
if (close == NULL) return(0);
if (!xmlStrcmp(BAD_CAST *close, new)) break;
}
i = close - htmlStartClose;
i++;
while (htmlStartClose[i] != NULL) {
if (!xmlStrcmp(BAD_CAST htmlStartClose[i], old)) {
return(1);
}
i++;
}
return(0);
}
/**
* htmlAutoClose:
* @ctxt: an HTML parser context
* @new: The new tag name
*
* The HTmL DtD allows a tag to implicitely close other tags.
* The list is kept in htmlStartClose array. This function is
* called when a new tag has been detected and generates the
* appropriates closes if possible/needed.
*/
void
htmlAutoClose(htmlParserCtxtPtr ctxt, const CHAR *new) {
while ((ctxt->node != NULL) &&
(htmlCheckAutoClose(new, ctxt->node->name))) {
#ifdef DEBUG
printf("htmlAutoClose: %s closes %s\n", new, ctxt->node->name);
#endif
if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL))
ctxt->sax->endElement(ctxt->userData, ctxt->node->name);
}
}
/**
* htmlAutoCloseOnClose:
* @ctxt: an HTML parser context
* @new: The new tag name
*
* The HTmL DtD allows an ending tag to implicitely close other tags.
*/
void
htmlAutoCloseOnClose(htmlParserCtxtPtr ctxt, const CHAR *new) {
htmlElemDescPtr info;
while ((ctxt->node != NULL) &&
(xmlStrcmp(new, ctxt->node->name))) {
info = htmlTagLookup(ctxt->node->name);
if ((info == NULL) || (info->endTag == 1)) {
#ifdef DEBUG
printf("htmlAutoCloseOnClose: %s closes %s\n", new, ctxt->node->name);
#endif
if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL))
ctxt->sax->endElement(ctxt->userData, ctxt->node->name);
} else
break;
}
}
/************************************************************************
* *
* 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" },
{ 39, "apos", "single quote" },
{ 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.
*/
{ 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 = (CHAR *) realloc(buffer, buffer##_size * sizeof(CHAR)); \
if (buffer == NULL) { \
perror("realloc failed"); \
exit(1); \
} \
}
/**
* 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 CHAR *name) {
int i;
for (i = 0;i < (sizeof(html40EntitiesTable)/
sizeof(html40EntitiesTable[0]));i++) {
if (!xmlStrcmp(name, BAD_CAST html40EntitiesTable[i].name)) {
#ifdef DEBUG
printf("Found entity %s\n", name);
#endif
return(&html40EntitiesTable[i]);
}
}
return(NULL);
}
/**
* htmlDecodeEntities:
* @ctxt: the parser context
* @len: the len to decode (in bytes !), -1 for no size limit
* @end: an end marker CHAR, 0 if none
* @end2: an end marker CHAR, 0 if none
* @end3: an end marker CHAR, 0 if none
*
* Subtitute the HTML entities by their value
*
* TODO: once the internal representation will be UTF-8, all entities
* will be substituable, in the meantime we only apply the substitution
* to the one with values in the 0-255 UNICODE range
*
* Returns A newly allocated string with the substitution done. The caller
* must deallocate it !
*/
CHAR *
htmlDecodeEntities(htmlParserCtxtPtr ctxt, int len,
CHAR end, CHAR end2, CHAR end3) {
CHAR *buffer = NULL;
int buffer_size = 0;
CHAR *out = NULL;
CHAR *name = NULL;
CHAR *cur = NULL;
htmlEntityDescPtr ent;
int nbchars = 0;
unsigned int max = (unsigned int) len;
/*
* allocate a translation buffer.
*/
buffer_size = 1000;
buffer = (CHAR *) malloc(buffer_size * sizeof(CHAR));
if (buffer == NULL) {
perror("htmlDecodeEntities: malloc failed");
return(NULL);
}
out = buffer;
/*
* Ok loop until we reach one of the ending char or a size limit.
*/
while ((nbchars < max) && (CUR != end) &&
(CUR != end2) && (CUR != end3)) {
if (CUR == '&') {
if (NXT(1) == '#') {
int val = htmlParseCharRef(ctxt);
/* invalid for UTF-8 variable encoding !!!!! */
*out++ = val;
nbchars += 3; /* !!!! */
} else {
ent = htmlParseEntityRef(ctxt, &name);
if (name != NULL) {
if ((ent == NULL) || (ent->value <= 0) ||
(ent->value >= 255)) {
*out++ = '&';
cur = name;
while (*cur != 0) {
if (out - buffer > buffer_size - 100) {
int index = out - buffer;
growBuffer(buffer);
out = &buffer[index];
}
*out++ = *cur++;
}
*out++ = ';';
} else {
/* invalid for UTF-8 variable encoding !!!!! */
*out++ = (CHAR)ent->value;
if (out - buffer > buffer_size - 100) {
int index = out - buffer;
growBuffer(buffer);
out = &buffer[index];
}
}
nbchars += 2 + xmlStrlen(name);
free(name);
}
}
} else {
/* invalid for UTF-8 , use COPY(out); !!!!! */
*out++ = CUR;
nbchars++;
if (out - buffer > buffer_size - 100) {
int index = out - buffer;
growBuffer(buffer);
out = &buffer[index];
}
NEXT;
}
}
*out++ = 0;
return(buffer);
}
/************************************************************************
* *
* Commodity functions to handle encodings *
* *
************************************************************************/
/**
* htmlSwitchEncoding:
* @ctxt: the parser context
* @len: the len of @cur
*
* change the input functions when discovering the character encoding
* of a given entity.
*
*/
void
htmlSwitchEncoding(htmlParserCtxtPtr ctxt, xmlCharEncoding enc)
{
switch (enc) {
case XML_CHAR_ENCODING_ERROR:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "encoding unknown\n");
ctxt->wellFormed = 0;
break;
case XML_CHAR_ENCODING_NONE:
/* let's assume it's UTF-8 without the XML decl */
return;
case XML_CHAR_ENCODING_UTF8:
/* default encoding, no conversion should be needed */
return;
case XML_CHAR_ENCODING_UTF16LE:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding UTF16 little endian not supported\n");
break;
case XML_CHAR_ENCODING_UTF16BE:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding UTF16 big endian not supported\n");
break;
case XML_CHAR_ENCODING_UCS4LE:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding USC4 little endian not supported\n");
break;
case XML_CHAR_ENCODING_UCS4BE:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding USC4 big endian not supported\n");
break;
case XML_CHAR_ENCODING_EBCDIC:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding EBCDIC not supported\n");
break;
case XML_CHAR_ENCODING_UCS4_2143:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding UCS4 2143 not supported\n");
break;
case XML_CHAR_ENCODING_UCS4_3412:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding UCS4 3412 not supported\n");
break;
case XML_CHAR_ENCODING_UCS2:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding UCS2 not supported\n");
break;
case XML_CHAR_ENCODING_8859_1:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding ISO_8859_1 ISO Latin 1 not supported\n");
break;
case XML_CHAR_ENCODING_8859_2:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding ISO_8859_2 ISO Latin 2 not supported\n");
break;
case XML_CHAR_ENCODING_8859_3:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding ISO_8859_3 not supported\n");
break;
case XML_CHAR_ENCODING_8859_4:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding ISO_8859_4 not supported\n");
break;
case XML_CHAR_ENCODING_8859_5:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding ISO_8859_5 not supported\n");
break;
case XML_CHAR_ENCODING_8859_6:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding ISO_8859_6 not supported\n");
break;
case XML_CHAR_ENCODING_8859_7:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding ISO_8859_7 not supported\n");
break;
case XML_CHAR_ENCODING_8859_8:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding ISO_8859_8 not supported\n");
break;
case XML_CHAR_ENCODING_8859_9:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding ISO_8859_9 not supported\n");
break;
case XML_CHAR_ENCODING_2022_JP:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding ISO-2022-JPnot supported\n");
break;
case XML_CHAR_ENCODING_SHIFT_JIS:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding Shift_JISnot supported\n");
break;
case XML_CHAR_ENCODING_EUC_JP:
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"char encoding EUC-JPnot supported\n");
break;
}
}
/************************************************************************
* *
* Commodity functions, cleanup needed ? *
* *
************************************************************************/
/**
* areBlanks:
* @ctxt: an HTML parser context
* @str: a CHAR *
* @len: the size of @str
*
* Is this a sequence of blank chars that one can ignore ?
*
* Returns 1 if ignorable 0 otherwise.
*/
static int areBlanks(htmlParserCtxtPtr ctxt, const CHAR *str, int len) {
int i;
xmlNodePtr lastChild;
for (i = 0;i < len;i++)
if (!(IS_BLANK(str[i]))) return(0);
if (CUR != '<') return(0);
if (ctxt->node == NULL) return(0);
lastChild = xmlGetLastChild(ctxt->node);
if (lastChild == NULL) {
if (ctxt->node->content != NULL) return(0);
} else if (xmlNodeIsText(lastChild))
return(0);
return(1);
}
/**
* htmlHandleEntity:
* @ctxt: an HTML parser context
* @entity: an XML entity pointer.
*
* Default handling of an HTML entity, call the parser with the
* substitution string
*/
void
htmlHandleEntity(htmlParserCtxtPtr ctxt, xmlEntityPtr entity) {
int len;
if (entity->content == NULL) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "htmlHandleEntity %s: content == NULL\n",
entity->name);
ctxt->wellFormed = 0;
return;
}
len = xmlStrlen(entity->content);
/*
* Just handle the content as a set of chars.
*/
if ((ctxt->sax != NULL) && (ctxt->sax->characters != NULL))
ctxt->sax->characters(ctxt->userData, entity->content, len);
}
/**
* htmlNewDoc:
* @URI: URI for the dtd, or NULL
* @ExternalID: the external ID of the DTD, or NULL
*
* Returns a new document
*/
htmlDocPtr
htmlNewDoc(const CHAR *URI, const CHAR *ExternalID) {
xmlDocPtr cur;
/*
* Allocate a new document and fill the fields.
*/
cur = (xmlDocPtr) malloc(sizeof(xmlDoc));
if (cur == NULL) {
fprintf(stderr, "xmlNewDoc : malloc failed\n");
return(NULL);
}
cur->type = XML_DOCUMENT_NODE;
cur->version = NULL;
cur->intSubset = NULL;
xmlCreateIntSubset(cur, BAD_CAST "HTML", ExternalID, URI);
cur->name = NULL;
cur->root = NULL;
cur->extSubset = NULL;
cur->oldNs = NULL;
cur->encoding = NULL;
cur->standalone = 1;
cur->compression = 0;
#ifndef XML_WITHOUT_CORBA
cur->_private = NULL;
cur->vepv = NULL;
#endif
return(cur);
}
/************************************************************************
* *
* The parser itself *
* Relates to http://www.w3.org/TR/html40 *
* *
************************************************************************/
/************************************************************************
* *
* The parser itself *
* *
************************************************************************/
/**
* htmlParseHTMLName:
* @ctxt: an HTML parser context
*
* parse an HTML tag or attribute name, note that we convert it to uppercase
* since HTML names are not case-sensitive.
*
* Returns the Tag Name parsed or NULL
*/
CHAR *
htmlParseHTMLName(htmlParserCtxtPtr ctxt) {
CHAR *ret = NULL;
int i = 0;
CHAR loc[100];
if (!IS_LETTER(CUR) && (CUR != '_') &&
(CUR != ':')) return(NULL);
while ((i < 100) && ((IS_LETTER(CUR)) || (IS_DIGIT(CUR)))) {
if ((CUR >= 0x61) && (CUR <= 0x7a)) loc[i] = CUR - 0x20;
else loc[i] = CUR;
i++;
NEXT;
}
ret = xmlStrndup(loc, i);
return(ret);
}
/**
* htmlParseName:
* @ctxt: an HTML parser context
*
* parse an HTML name, this routine is case sensistive.
*
* Returns the Name parsed or NULL
*/
CHAR *
htmlParseName(htmlParserCtxtPtr ctxt) {
CHAR 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
*
* parse an HTML attribute value (without quotes).
*
* Returns the Nmtoken parsed or NULL
*/
CHAR *
htmlParseHTMLAttribute(htmlParserCtxtPtr ctxt) {
CHAR buf[HTML_MAX_NAMELEN];
int len = 0;
GROW;
while ((!IS_BLANK(CUR)) && (CUR != '<') &&
(CUR != '&') && (CUR != '>') &&
(CUR != '\'') && (CUR != '"')) {
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 != '\'') && (CUR != '"'))
NEXT;
break;
}
}
return(xmlStrndup(buf, len));
}
/**
* htmlParseNmtoken:
* @ctxt: an HTML parser context
*
* parse an HTML Nmtoken.
*
* Returns the Nmtoken parsed or NULL
*/
CHAR *
htmlParseNmtoken(htmlParserCtxtPtr ctxt) {
CHAR 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, CHAR **str) {
CHAR *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 == ';') {
NEXT;
*str = name;
/*
* Lookup the entity in the table.
*/
ent = htmlEntityLookup(name);
} else {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"htmlParseEntityRef: expecting ';'\n");
ctxt->wellFormed = 0;
if (ctxt->sax->characters != NULL) {
ctxt->sax->characters(ctxt->userData, BAD_CAST "&", 1);
ctxt->sax->characters(ctxt->userData, name, xmlStrlen(name));
}
free(name);
}
}
}
return(ent);
}
/**
* htmlParseAttValue:
* @ctxt: an HTML parser context
*
* parse a value for an attribute
* Note: the parser won't do substitution of entities here, this
* will be handled later in xmlStringGetNodeList, unless it was
* asked for ctxt->replaceEntities != 0
*
* Returns the AttValue parsed or NULL.
*/
CHAR *
htmlParseAttValue(htmlParserCtxtPtr ctxt) {
CHAR *ret = NULL;
if (CUR == '"') {
NEXT;
ret = htmlDecodeEntities(ctxt, -1, '"', '<', 0);
if (CUR == '<') {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Unescaped '<' not allowed in attributes values\n");
ctxt->wellFormed = 0;
}
if (CUR != '"') {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "AttValue: ' expected\n");
ctxt->wellFormed = 0;
} else
NEXT;
} else if (CUR == '\'') {
NEXT;
ret = htmlDecodeEntities(ctxt, -1, '\'', '<', 0);
if (CUR == '<') {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Unescaped '<' not allowed in attributes values\n");
ctxt->wellFormed = 0;
}
if (CUR != '\'') {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "AttValue: ' expected\n");
ctxt->wellFormed = 0;
} else
NEXT;
} else {
/*
* That's an HTMLism, the attribute value may not be quoted
*/
ret = htmlParseHTMLAttribute(ctxt);
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
*/
CHAR *
htmlParseSystemLiteral(htmlParserCtxtPtr ctxt) {
const CHAR *q;
CHAR *ret = NULL;
if (CUR == '"') {
NEXT;
q = CUR_PTR;
while ((IS_CHAR(CUR)) && (CUR != '"'))
NEXT;
if (!IS_CHAR(CUR)) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "Unfinished SystemLiteral\n");
ctxt->wellFormed = 0;
} else {
ret = xmlStrndup(q, CUR_PTR - q);
NEXT;
}
} else if (CUR == '\'') {
NEXT;
q = CUR_PTR;
while ((IS_CHAR(CUR)) && (CUR != '\''))
NEXT;
if (!IS_CHAR(CUR)) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "Unfinished SystemLiteral\n");
ctxt->wellFormed = 0;
} else {
ret = xmlStrndup(q, CUR_PTR - q);
NEXT;
}
} else {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "SystemLiteral \" or ' expected\n");
ctxt->wellFormed = 0;
}
return(ret);
}
/**
* htmlParsePubidLiteral:
* @ctxt: an HTML parser context
*
* parse an HTML public literal
*
* [12] PubidLiteral ::= '"' PubidChar* '"' | "'" (PubidChar - "'")* "'"
*
* Returns the PubidLiteral parsed or NULL.
*/
CHAR *
htmlParsePubidLiteral(htmlParserCtxtPtr ctxt) {
const CHAR *q;
CHAR *ret = NULL;
/*
* Name ::= (Letter | '_') (NameChar)*
*/
if (CUR == '"') {
NEXT;
q = CUR_PTR;
while (IS_PUBIDCHAR(CUR)) NEXT;
if (CUR != '"') {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "Unfinished PubidLiteral\n");
ctxt->wellFormed = 0;
} else {
ret = xmlStrndup(q, CUR_PTR - q);
NEXT;
}
} else if (CUR == '\'') {
NEXT;
q = CUR_PTR;
while ((IS_LETTER(CUR)) && (CUR != '\''))
NEXT;
if (!IS_LETTER(CUR)) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "Unfinished PubidLiteral\n");
ctxt->wellFormed = 0;
} else {
ret = xmlStrndup(q, CUR_PTR - q);
NEXT;
}
} else {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "SystemLiteral \" or ' expected\n");
ctxt->wellFormed = 0;
}
return(ret);
}
/**
* htmlParseCharData:
* @ctxt: an HTML parser context
* @cdata: int indicating whether we are within a CDATA section
*
* parse a CharData section.
* if we are within a CDATA section ']]>' marks an end of section.
*
* [14] CharData ::= [^<&]* - ([^<&]* ']]>' [^<&]*)
*/
void
htmlParseCharData(htmlParserCtxtPtr ctxt, int cdata) {
const CHAR *q;
q = CUR_PTR;
while ((IS_CHAR(CUR)) && (CUR != '<') &&
(CUR != '&')) {
if ((CUR == ']') && (NXT(1) == ']') &&
(NXT(2) == '>')) {
if (cdata) break;
else {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Sequence ']]>' not allowed in content\n");
ctxt->wellFormed = 0;
}
}
NEXT;
}
if (q == CUR_PTR) return;
/*
* Ok the segment [q CUR_PTR] is to be consumed as chars.
*/
if (ctxt->sax != NULL) {
if (areBlanks(ctxt, q, CUR_PTR - q)) {
if (ctxt->sax->ignorableWhitespace != NULL)
ctxt->sax->ignorableWhitespace(ctxt->userData, q, CUR_PTR - q);
} else {
if (ctxt->sax->characters != NULL)
ctxt->sax->characters(ctxt->userData, q, CUR_PTR - q);
}
}
}
/**
* htmlParseExternalID:
* @ctxt: an HTML parser context
* @publicID: a CHAR** receiving PubidLiteral
* @strict: indicate whether we should restrict parsing to only
* production [75], see NOTE below
*
* Parse an External ID or a Public ID
*
* NOTE: Productions [75] and [83] interract badly since [75] can generate
* 'PUBLIC' S PubidLiteral S SystemLiteral
*
* [75] ExternalID ::= 'SYSTEM' S SystemLiteral
* | 'PUBLIC' S PubidLiteral S SystemLiteral
*
* [83] PublicID ::= 'PUBLIC' S PubidLiteral
*
* Returns the function returns SystemLiteral and in the second
* case publicID receives PubidLiteral, is strict is off
* it is possible to return NULL and have publicID set.
*/
CHAR *
htmlParseExternalID(htmlParserCtxtPtr ctxt, CHAR **publicID, int strict) {
CHAR *URI = NULL;
if ((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
* @create: should we create a node, or just skip the content
*
* Parse an XML (SGML) comment <!-- .... -->
*
* [15] Comment ::= '<!--' ((Char - '-') | ('-' (Char - '-')))* '-->'
*/
void
htmlParseComment(htmlParserCtxtPtr ctxt, int create) {
const CHAR *q, *start;
const CHAR *r;
CHAR *val;
/*
* Check that there is a comment right here.
*/
if ((CUR != '<') || (NXT(1) != '!') ||
(NXT(2) != '-') || (NXT(3) != '-')) return;
SKIP(4);
start = q = CUR_PTR;
NEXT;
r = CUR_PTR;
NEXT;
while (IS_CHAR(CUR) &&
((CUR == ':') || (CUR != '>') ||
(*r != '-') || (*q != '-'))) {
if ((*r == '-') && (*q == '-')) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Comment must not contain '--' (double-hyphen)`\n");
ctxt->wellFormed = 0;
}
NEXT;r++;q++;
}
if (!IS_CHAR(CUR)) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "Comment not terminated \n<!--%.50s\n", start);
ctxt->wellFormed = 0;
} else {
NEXT;
if (create) {
val = xmlStrndup(start, q - start);
if ((ctxt->sax != NULL) && (ctxt->sax->comment != NULL))
ctxt->sax->comment(ctxt->userData, val);
free(val);
}
}
}
/**
* htmlParseCharRef:
* @ctxt: an HTML parser context
*
* parse Reference declarations
*
* [66] CharRef ::= '&#' [0-9]+ ';' |
* '&#x' [0-9a-fA-F]+ ';'
*
* Returns the value parsed (as an int)
*/
int
htmlParseCharRef(htmlParserCtxtPtr ctxt) {
int val = 0;
if ((CUR == '&') && (NXT(1) == '#') &&
(NXT(2) == 'x')) {
SKIP(3);
while (CUR != ';') {
if ((CUR >= '0') && (CUR <= '9'))
val = val * 16 + (CUR - '0');
else if ((CUR >= 'a') && (CUR <= 'f'))
val = val * 16 + (CUR - 'a') + 10;
else if ((CUR >= 'A') && (CUR <= 'F'))
val = val * 16 + (CUR - 'A') + 10;
else {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"htmlParseCharRef: invalid hexadecimal value\n");
ctxt->wellFormed = 0;
val = 0;
break;
}
NEXT;
}
if (CUR == ';')
NEXT;
} else if ((CUR == '&') && (NXT(1) == '#')) {
SKIP(2);
while (CUR != ';') {
if ((CUR >= '0') && (CUR <= '9'))
val = val * 10 + (CUR - '0');
else {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"htmlParseCharRef: invalid decimal value\n");
ctxt->wellFormed = 0;
val = 0;
break;
}
NEXT;
}
if (CUR == ';')
NEXT;
} else {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "htmlParseCharRef: invalid value\n");
ctxt->wellFormed = 0;
}
/*
* Check the value IS_CHAR ...
*/
if (IS_CHAR(val)) {
return(val);
} else {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "htmlParseCharRef: invalid CHAR value %d\n",
val);
ctxt->wellFormed = 0;
}
return(0);
}
/**
* htmlParseDocTypeDecl :
* @ctxt: an HTML parser context
*
* parse a DOCTYPE declaration
*
* [28] doctypedecl ::= '<!DOCTYPE' S Name (S ExternalID)? S?
* ('[' (markupdecl | PEReference | S)* ']' S?)? '>'
*/
void
htmlParseDocTypeDecl(htmlParserCtxtPtr ctxt) {
CHAR *name;
CHAR *ExternalID = NULL;
CHAR *URI = NULL;
/*
* We know that '<!DOCTYPE' has been detected.
*/
SKIP(9);
SKIP_BLANKS;
/*
* Parse the DOCTYPE name.
*/
name = htmlParseName(ctxt);
if (name == NULL) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "htmlParseDocTypeDecl : no DOCTYPE name !\n");
ctxt->wellFormed = 0;
}
/*
* 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 ... */
} else {
}
NEXT;
/*
* Create the document accordingly to the DOCTYPE
*/
ctxt->myDoc = htmlNewDoc(URI, ExternalID);
/*
* Cleanup, since we don't use all those identifiers
*/
if (URI != NULL) free(URI);
if (ExternalID != NULL) free(ExternalID);
if (name != NULL) free(name);
}
/**
* htmlParseAttribute:
* @ctxt: an HTML parser context
* @value: a CHAR ** used to store the value of the attribute
*
* parse an attribute
*
* [41] Attribute ::= Name Eq AttValue
*
* [25] Eq ::= S? '=' S?
*
* With namespace:
*
* [NS 11] Attribute ::= QName Eq AttValue
*
* Also the case QName == xmlns:??? is handled independently as a namespace
* definition.
*
* Returns the attribute name, and the value in *value.
*/
CHAR *
htmlParseAttribute(htmlParserCtxtPtr ctxt, CHAR **value) {
CHAR *name, *val;
*value = NULL;
name = htmlParseName(ctxt);
if (name == NULL) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "error parsing attribute name\n");
ctxt->wellFormed = 0;
return(NULL);
}
/*
* read the value
*/
SKIP_BLANKS;
if (CUR == '=') {
NEXT;
SKIP_BLANKS;
val = htmlParseAttValue(ctxt);
} else {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Specification mandate value for attribute %s\n", name);
ctxt->wellFormed = 0;
return(NULL);
}
*value = val;
return(name);
}
/**
* htmlParseStartTag:
* @ctxt: an HTML parser context
*
* parse a start of tag either for rule element or
* EmptyElement. In both case we don't parse the tag closing chars.
*
* [40] STag ::= '<' Name (S Attribute)* S? '>'
*
* [44] EmptyElemTag ::= '<' Name (S Attribute)* S? '/>'
*
* With namespace:
*
* [NS 8] STag ::= '<' QName (S Attribute)* S? '>'
*
* [NS 10] EmptyElement ::= '<' QName (S Attribute)* S? '/>'
*
* Returns the element name parsed
*/
CHAR *
htmlParseStartTag(htmlParserCtxtPtr ctxt) {
CHAR *name;
CHAR *attname;
CHAR *attvalue;
const CHAR **atts = NULL;
int nbatts = 0;
int maxatts = 0;
int i;
if (CUR != '<') return(NULL);
NEXT;
name = htmlParseHTMLName(ctxt);
if (name == NULL) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"htmlParseStartTag: invalid element name\n");
ctxt->wellFormed = 0;
return(NULL);
}
/*
* Check for auto-closure of HTML elements.
*/
htmlAutoClose(ctxt, name);
/*
* Now parse the attributes, it ends up with the ending
*
* (S Attribute)* S?
*/
SKIP_BLANKS;
while ((IS_CHAR(CUR)) &&
(CUR != '>') &&
((CUR != '/') || (NXT(1) != '>'))) {
const CHAR *q = CUR_PTR;
attname = htmlParseAttribute(ctxt, &attvalue);
if ((attname != NULL) && (attvalue != NULL)) {
/*
* Well formedness requires at most one declaration of an attribute
*/
for (i = 0; i < nbatts;i += 2) {
if (!xmlStrcmp(atts[i], attname)) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "Attribute %s redefined\n",
name);
ctxt->wellFormed = 0;
free(attname);
free(attvalue);
break;
}
}
/*
* Add the pair to atts
*/
if (atts == NULL) {
maxatts = 10;
atts = (const CHAR **) malloc(maxatts * sizeof(CHAR *));
if (atts == NULL) {
fprintf(stderr, "malloc of %ld byte failed\n",
maxatts * (long)sizeof(CHAR *));
return(NULL);
}
} else if (nbatts + 2 < maxatts) {
maxatts *= 2;
atts = (const CHAR **) realloc(atts, maxatts * sizeof(CHAR *));
if (atts == NULL) {
fprintf(stderr, "realloc of %ld byte failed\n",
maxatts * (long)sizeof(CHAR *));
return(NULL);
}
}
atts[nbatts++] = attname;
atts[nbatts++] = attvalue;
atts[nbatts] = NULL;
atts[nbatts + 1] = NULL;
}
SKIP_BLANKS;
if (q == CUR_PTR) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"htmlParseStartTag: problem parsing attributes\n");
ctxt->wellFormed = 0;
break;
}
}
/*
* SAX: Start of Element !
*/
if ((ctxt->sax != NULL) && (ctxt->sax->startElement != NULL))
ctxt->sax->startElement(ctxt->userData, name, atts);
if (atts != NULL) {
for (i = 0;i < nbatts;i++) free((CHAR *) atts[i]);
free(atts);
}
return(name);
}
/**
* htmlParseEndTag:
* @ctxt: an HTML parser context
* @tagname: the tag name as parsed in the opening tag.
*
* parse an end of tag
*
* [42] ETag ::= '</' Name S? '>'
*
* With namespace
*
* [NS 9] ETag ::= '</' QName S? '>'
*/
void
htmlParseEndTag(htmlParserCtxtPtr ctxt, const CHAR *tagname) {
CHAR *name;
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);
/*
* 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;
/*
* Check that we are not closing an already closed tag,
* <p><b>...</p></b> is a really common error !
*/
for (i = ctxt->nodeNr - 1;i >= 0;i--) {
if ((ctxt->nodeTab[i] != NULL) &&
(!xmlStrcmp(tagname, ctxt->nodeTab[i]->name)))
break;
}
if (i < 0) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"htmlParseEndTag: unexpected close for tag %s\n",
tagname);
free(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, tagname)) {
if ((ctxt->node != NULL) &&
(xmlStrcmp(ctxt->node->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->node->name);
ctxt->wellFormed = 0;
}
}
/*
* SAX: End of Tag
*/
if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL))
ctxt->sax->endElement(ctxt->userData, name);
if (name != NULL)
free(name);
return;
}
/**
* htmlParseReference:
* @ctxt: an HTML parser context
*
* parse and handle entity references in content,
* this will end-up in a call to character() since this is either a
* CharRef, or a predefined entity.
*/
void
htmlParseReference(htmlParserCtxtPtr ctxt) {
htmlEntityDescPtr ent;
CHAR out[2];
CHAR *name;
int val;
if (CUR != '&') return;
if (NXT(1) == '#') {
val = htmlParseCharRef(ctxt);
/* invalid for UTF-8 variable encoding !!!!! */
out[0] = val;
out[1] = 0;
if ((ctxt->sax != NULL) && (ctxt->sax->characters != NULL))
ctxt->sax->characters(ctxt->userData, out, 1);
} else {
ent = htmlParseEntityRef(ctxt, &name);
if (name == NULL) return; /* Shall we output & anyway ? */
if ((ent == NULL) || (ent->value <= 0) || (ent->value >= 255)) {
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 {
/* invalid for UTF-8 variable encoding !!!!! */
out[0] = ent->value;
out[1] = 0;
if ((ctxt->sax != NULL) && (ctxt->sax->characters != NULL))
ctxt->sax->characters(ctxt->userData, out, 1);
}
free(name);
}
}
/**
* htmlParseContent:
* @ctxt: an HTML parser context
* @name: the node name
*
* Parse a content: comment, sub-element, reference or text.
*
*/
void
htmlParseContent(htmlParserCtxtPtr ctxt, const CHAR *name) {
htmlNodePtr currentNode;
currentNode = ctxt->node;
while ((CUR != '<') || (NXT(1) != '/')) {
const CHAR *test = CUR_PTR;
/*
* Has this node been popped out during parsing of
* the next element
*/
if (currentNode != ctxt->node) return;
/*
* First case : a comment
*/
if ((CUR == '<') && (NXT(1) == '!') &&
(NXT(2) == '-') && (NXT(3) == '-')) {
htmlParseComment(ctxt, 1);
}
/*
* Second case : a sub-element.
*/
else if (CUR == '<') {
htmlParseElement(ctxt);
}
/*
* Third case : a reference. If if has not been resolved,
* parsing returns it's Name, create the node
*/
else if (CUR == '&') {
htmlParseReference(ctxt);
}
/*
* Last case, text. Note that References are handled directly.
*/
else {
htmlParseCharData(ctxt, 0);
}
if (test == CUR_PTR) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"detected an error in element content\n");
ctxt->wellFormed = 0;
break;
}
GROW;
}
/*
* parse the end of tag: '</' should be here.
*/
htmlParseEndTag(ctxt, name);
}
/**
* htmlParseElement:
* @ctxt: an HTML parser context
*
* parse an HTML element, this is highly recursive
*
* [39] element ::= EmptyElemTag | STag content ETag
*
* [41] Attribute ::= Name Eq AttValue
*/
void
htmlParseElement(htmlParserCtxtPtr ctxt) {
const CHAR *openTag = CUR_PTR;
CHAR *name;
htmlParserNodeInfo node_info;
htmlNodePtr currentNode;
htmlElemDescPtr info;
/* Capture start position */
node_info.begin_pos = CUR_PTR - ctxt->input->base;
node_info.begin_line = ctxt->input->line;
name = htmlParseStartTag(ctxt);
if (name == NULL) {
return;
}
/*
* Lookup the info for that element.
*/
info = htmlTagLookup(name);
if (info == NULL) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "Tag %s invalid\n",
name);
ctxt->wellFormed = 0;
} else if (info->depr) {
/***************************
if ((ctxt->sax != NULL) && (ctxt->sax->warning != NULL))
ctxt->sax->warning(ctxt->userData, "Tag %s is deprecated\n",
name);
***************************/
}
/*
* Check for an Empty Element labelled the XML/SGML way
*/
if ((CUR == '/') && (NXT(1) == '>')) {
SKIP(2);
if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL))
ctxt->sax->endElement(ctxt->userData, name);
free(name);
return;
}
if (CUR == '>') {
NEXT;
} else {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "Couldn't find end of Start Tag\n%.30s\n",
openTag);
ctxt->wellFormed = 0;
/*
* end of parsing of this node.
*/
nodePop(ctxt);
free(name);
return;
}
/*
* Check for an Empty Element from DTD definition
*/
if ((info != NULL) && (info->empty)) {
if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL))
ctxt->sax->endElement(ctxt->userData, name);
free(name);
return;
}
/*
* Parse the content of the element:
*/
currentNode = ctxt->node;
htmlParseContent(ctxt, name);
/*
* check whether the element get popped due to auto closure
* on start tag
*/
if (currentNode != ctxt->node) {
free(name);
return;
}
if (!IS_CHAR(CUR)) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Premature end of data in tag %.30s\n", openTag);
ctxt->wellFormed = 0;
/*
* end of parsing of this node.
*/
nodePop(ctxt);
free(name);
return;
}
free(name);
}
/**
* htmlParseDocument :
* @ctxt: an HTML parser context
*
* parse an HTML document (and build a tree if using the standard SAX
* interface).
*
* Returns 0, -1 in case of error. the parser context is augmented
* as a result of the parsing.
*/
int
htmlParseDocument(htmlParserCtxtPtr ctxt) {
htmlDefaultSAXHandlerInit();
ctxt->html = 1;
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 '<'
*/
if (IS_BLANK(CUR)) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData,
"Extra spaces at the beginning of the document are not allowed\n");
ctxt->wellFormed = 0;
SKIP_BLANKS;
}
if (CUR == 0) {
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->error(ctxt->userData, "Document is empty\n");
ctxt->wellFormed = 0;
}
/*
* Then possibly doc type declaration(s) and more Misc
* (doctypedecl Misc*)?
*/
if ((CUR == '<') && (NXT(1) == '!') &&
(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;
/*
* Create the document if not done already.
*/
if (ctxt->myDoc == NULL) {
ctxt->myDoc = htmlNewDoc(NULL, NULL);
}
/*
* Time to start parsing the tree itself
*/
htmlParseElement(ctxt);
/*
* SAX: end of the document processing.
*/
if ((ctxt->sax) && (ctxt->sax->endDocument != NULL))
ctxt->sax->endDocument(ctxt->userData);
if (! ctxt->wellFormed) return(-1);
return(0);
}
/********************************************************************************
* *
* Parser contexts handling *
* *
********************************************************************************/
/**
* xmlInitParserCtxt:
* @ctxt: an HTML parser context
*
* Initialize a parser context
*/
void
htmlInitParserCtxt(htmlParserCtxtPtr ctxt)
{
htmlSAXHandler *sax;
sax = (htmlSAXHandler *) malloc(sizeof(htmlSAXHandler));
if (sax == NULL) {
fprintf(stderr, "htmlInitParserCtxt: out of memory\n");
}
/* Allocate the Input stack */
ctxt->inputTab = (htmlParserInputPtr *) malloc(5 * sizeof(htmlParserInputPtr));
ctxt->inputNr = 0;
ctxt->inputMax = 5;
ctxt->input = NULL;
ctxt->version = NULL;
ctxt->encoding = NULL;
ctxt->standalone = -1;
/* Allocate the Node stack */
ctxt->nodeTab = (htmlNodePtr *) malloc(10 * sizeof(htmlNodePtr));
ctxt->nodeNr = 0;
ctxt->nodeMax = 10;
ctxt->node = NULL;
if (sax == NULL) ctxt->sax = &htmlDefaultSAXHandler;
else {
ctxt->sax = sax;
memcpy(sax, &htmlDefaultSAXHandler, sizeof(htmlSAXHandler));
}
ctxt->userData = ctxt;
ctxt->myDoc = NULL;
ctxt->wellFormed = 1;
ctxt->replaceEntities = 0;
ctxt->html = 1;
ctxt->record_info = 0;
xmlInitNodeInfoSeq(&ctxt->node_seq);
}
/**
* htmlFreeParserCtxt:
* @ctxt: an HTML parser context
*
* Free all the memory used by a parser context. However the parsed
* document in ctxt->myDoc is not freed.
*/
void
htmlFreeParserCtxt(htmlParserCtxtPtr ctxt)
{
htmlParserInputPtr input;
if (ctxt == NULL) return;
while ((input = inputPop(ctxt)) != NULL) {
xmlFreeInputStream(input);
}
if (ctxt->nodeTab != NULL) free(ctxt->nodeTab);
if (ctxt->inputTab != NULL) free(ctxt->inputTab);
if (ctxt->version != NULL) free((char *) ctxt->version);
if ((ctxt->sax != NULL) && (ctxt->sax != &htmlDefaultSAXHandler))
free(ctxt->sax);
free(ctxt);
}
/**
* htmlCreateDocParserCtxt :
* @cur: a pointer to an array of CHAR
* @encoding: a free form C string describing the HTML document encoding, or NULL
*
* Create a parser context for an HTML document.
*
* Returns the new parser context or NULL
*/
htmlParserCtxtPtr
htmlCreateDocParserCtxt(CHAR *cur, const char *encoding) {
htmlParserCtxtPtr ctxt;
htmlParserInputPtr input;
/* htmlCharEncoding enc; */
ctxt = (htmlParserCtxtPtr) malloc(sizeof(htmlParserCtxt));
if (ctxt == NULL) {
perror("malloc");
return(NULL);
}
htmlInitParserCtxt(ctxt);
input = (htmlParserInputPtr) malloc(sizeof(htmlParserInput));
if (input == NULL) {
perror("malloc");
free(ctxt);
return(NULL);
}
/*
* plug some encoding conversion routines here. !!!
if (encoding != NULL) {
enc = htmlDetectCharEncoding(cur);
htmlSwitchEncoding(ctxt, enc);
}
*/
input->filename = NULL;
input->line = 1;
input->col = 1;
input->base = cur;
input->cur = cur;
input->free = NULL;
input->buf = NULL;
inputPush(ctxt, input);
return(ctxt);
}
/********************************************************************************
* *
* User entry points *
* *
********************************************************************************/
/**
* htmlSAXParseDoc :
* @cur: a pointer to an array of CHAR
* @encoding: a free form C string describing the HTML document encoding, or NULL
* @sax: the SAX handler block
* @userData: if using SAX, this pointer will be provided on callbacks.
*
* parse an HTML in-memory document and build a tree.
* It use the given SAX function block to handle the parsing callback.
* If sax is NULL, fallback to the default DOM tree building routines.
*
* Returns the resulting document tree
*/
htmlDocPtr
htmlSAXParseDoc(CHAR *cur, const char *encoding, htmlSAXHandlerPtr sax, void *userData) {
htmlDocPtr ret;
htmlParserCtxtPtr ctxt;
if (cur == NULL) return(NULL);
ctxt = htmlCreateDocParserCtxt(cur, encoding);
if (ctxt == NULL) return(NULL);
if (sax != NULL) {
ctxt->sax = sax;
ctxt->userData = userData;
}
htmlParseDocument(ctxt);
ret = ctxt->myDoc;
if (sax != NULL) {
ctxt->sax = NULL;
ctxt->userData = NULL;
}
htmlFreeParserCtxt(ctxt);
return(ret);
}
/**
* htmlParseDoc :
* @cur: a pointer to an array of CHAR
* @encoding: a free form C string describing the HTML document encoding, or NULL
*
* parse an HTML in-memory document and build a tree.
*
* Returns the resulting document tree
*/
htmlDocPtr
htmlParseDoc(CHAR *cur, const char *encoding) {
return(htmlSAXParseDoc(cur, encoding, NULL, NULL));
}
/**
* htmlCreateFileParserCtxt :
* @filename: the filename
* @encoding: a free form C string describing the HTML document encoding, or NULL
*
* Create a parser context for a file content.
* Automatic support for ZLIB/Compress compressed document is provided
* by default if found at compile-time.
*
* Returns the new parser context or NULL
*/
htmlParserCtxtPtr
htmlCreateFileParserCtxt(const char *filename, const char *encoding)
{
htmlParserCtxtPtr ctxt;
htmlParserInputPtr inputStream;
xmlParserInputBufferPtr buf;
/* htmlCharEncoding enc; */
buf = xmlParserInputBufferCreateFilename(filename, XML_CHAR_ENCODING_NONE);
if (buf == NULL) return(NULL);
ctxt = (htmlParserCtxtPtr) malloc(sizeof(htmlParserCtxt));
if (ctxt == NULL) {
perror("malloc");
return(NULL);
}
htmlInitParserCtxt(ctxt);
inputStream = (htmlParserInputPtr) malloc(sizeof(htmlParserInput));
if (inputStream == NULL) {
perror("malloc");
free(ctxt);
return(NULL);
}
inputStream->filename = strdup(filename);
inputStream->line = 1;
inputStream->col = 1;
inputStream->buf = buf;
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;
ctxt = htmlCreateFileParserCtxt(filename, encoding);
if (ctxt == NULL) return(NULL);
if (sax != NULL) {
ctxt->sax = sax;
ctxt->userData = userData;
}
htmlParseDocument(ctxt);
ret = ctxt->myDoc;
if (sax != NULL) {
ctxt->sax = NULL;
ctxt->userData = NULL;
}
htmlFreeParserCtxt(ctxt);
return(ret);
}
/**
* htmlParseFile :
* @filename: the filename
* @encoding: a free form C string describing the HTML document encoding, or NULL
*
* parse an HTML file and build a tree. Automatic support for ZLIB/Compress
* compressed document is provided by default if found at compile-time.
*
* Returns the resulting document tree
*/
htmlDocPtr
htmlParseFile(const char *filename, const char *encoding) {
return(htmlSAXParseFile(filename, encoding, NULL, NULL));
}
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