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HTMLparser.c
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/*
* HTMLparser.c : an HTML parser
*
* References:
* HTML Living Standard
* https://html.spec.whatwg.org/multipage/parsing.html
*
* Tokenization now conforms to HTML5. Tree construction still follows
* a custom, non-standard implementation. See:
*
* https://gitlab.gnome.org/GNOME/libxml2/-/issues/211
*
* See Copyright for the status of this software.
*
*/
#define IN_LIBXML
#include "libxml.h"
#ifdef LIBXML_HTML_ENABLED
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#include <libxml/HTMLparser.h>
#include <libxml/xmlmemory.h>
#include <libxml/tree.h>
#include <libxml/parser.h>
#include <libxml/parserInternals.h>
#include <libxml/xmlerror.h>
#include <libxml/HTMLtree.h>
#include <libxml/entities.h>
#include <libxml/encoding.h>
#include <libxml/xmlIO.h>
#include <libxml/uri.h>
#include "private/buf.h"
#include "private/dict.h"
#include "private/enc.h"
#include "private/error.h"
#include "private/html.h"
#include "private/io.h"
#include "private/parser.h"
#include "private/tree.h"
#define HTML_MAX_NAMELEN 1000
#define HTML_PARSER_BIG_BUFFER_SIZE 1000
#define HTML_PARSER_BUFFER_SIZE 100
#define IS_WS_HTML(c) \
(((c) == 0x20) || \
(((c) >= 0x09) && ((c) <= 0x0D) && ((c) != 0x0B)))
#define IS_HEX_DIGIT(c) \
((IS_ASCII_DIGIT(c)) || \
((((c) | 0x20) >= 'a') && (((c) | 0x20) <= 'f')))
#define IS_UPPER(c) \
(((c) >= 'A') && ((c) <= 'Z'))
#define IS_ALNUM(c) \
(IS_ASCII_LETTER(c) || IS_ASCII_DIGIT(c))
typedef const unsigned htmlAsciiMask[2];
static htmlAsciiMask MASK_DQ = {
0,
1u << ('"' - 32),
};
static htmlAsciiMask MASK_SQ = {
0,
1u << ('\'' - 32),
};
static htmlAsciiMask MASK_GT = {
0,
1u << ('>' - 32),
};
static htmlAsciiMask MASK_DASH = {
0,
1u << ('-' - 32),
};
static htmlAsciiMask MASK_WS_GT = {
1u << 0x09 | 1u << 0x0A | 1u << 0x0C | 1u << 0x0D,
1u << (' ' - 32) | 1u << ('>' - 32),
};
static htmlAsciiMask MASK_DQ_GT = {
0,
1u << ('"' - 32) | 1u << ('>' - 32),
};
static htmlAsciiMask MASK_SQ_GT = {
0,
1u << ('\'' - 32) | 1u << ('>' - 32),
};
static int htmlOmittedDefaultValue = 1;
static int
htmlParseElementInternal(htmlParserCtxtPtr ctxt);
/************************************************************************
* *
* Some factorized error routines *
* *
************************************************************************/
/**
* htmlErrMemory:
* @ctxt: an HTML parser context
* @extra: extra information
*
* Handle a redefinition of attribute error
*/
static void
htmlErrMemory(xmlParserCtxtPtr ctxt)
{
xmlCtxtErrMemory(ctxt);
}
/**
* htmlParseErr:
* @ctxt: an HTML parser context
* @error: the error number
* @msg: the error message
* @str1: string infor
* @str2: string infor
*
* Handle a fatal parser error, i.e. violating Well-Formedness constraints
*/
static void LIBXML_ATTR_FORMAT(3,0)
htmlParseErr(xmlParserCtxtPtr ctxt, xmlParserErrors error,
const char *msg, const xmlChar *str1, const xmlChar *str2)
{
xmlCtxtErr(ctxt, NULL, XML_FROM_HTML, error, XML_ERR_ERROR,
str1, str2, NULL, 0, msg, str1, str2);
}
/************************************************************************
* *
* Parser stacks related functions and macros *
* *
************************************************************************/
/**
* htmlnamePush:
* @ctxt: an HTML parser context
* @value: the element name
*
* Pushes a new element name on top of the name stack
*
* Returns -1 in case of error, the index in the stack otherwise
*/
static int
htmlnamePush(htmlParserCtxtPtr ctxt, const xmlChar * value)
{
if ((ctxt->html < 3) && (xmlStrEqual(value, BAD_CAST "head")))
ctxt->html = 3;
if ((ctxt->html < 10) && (xmlStrEqual(value, BAD_CAST "body")))
ctxt->html = 10;
if (ctxt->nameNr >= ctxt->nameMax) {
size_t newSize = ctxt->nameMax * 2;
const xmlChar **tmp;
tmp = xmlRealloc((xmlChar **) ctxt->nameTab,
newSize * sizeof(ctxt->nameTab[0]));
if (tmp == NULL) {
htmlErrMemory(ctxt);
return (-1);
}
ctxt->nameTab = tmp;
ctxt->nameMax = newSize;
}
ctxt->nameTab[ctxt->nameNr] = value;
ctxt->name = value;
return (ctxt->nameNr++);
}
/**
* htmlnamePop:
* @ctxt: an HTML parser context
*
* Pops the top element name from the name stack
*
* Returns the name just removed
*/
static const xmlChar *
htmlnamePop(htmlParserCtxtPtr ctxt)
{
const xmlChar *ret;
if (ctxt->nameNr <= 0)
return (NULL);
ctxt->nameNr--;
if (ctxt->nameNr < 0)
return (NULL);
if (ctxt->nameNr > 0)
ctxt->name = ctxt->nameTab[ctxt->nameNr - 1];
else
ctxt->name = NULL;
ret = ctxt->nameTab[ctxt->nameNr];
ctxt->nameTab[ctxt->nameNr] = NULL;
return (ret);
}
/**
* htmlNodeInfoPush:
* @ctxt: an HTML parser context
* @value: the node info
*
* Pushes a new element name on top of the node info stack
*
* Returns 0 in case of error, the index in the stack otherwise
*/
static int
htmlNodeInfoPush(htmlParserCtxtPtr ctxt, htmlParserNodeInfo *value)
{
if (ctxt->nodeInfoNr >= ctxt->nodeInfoMax) {
if (ctxt->nodeInfoMax == 0)
ctxt->nodeInfoMax = 5;
ctxt->nodeInfoMax *= 2;
ctxt->nodeInfoTab = (htmlParserNodeInfo *)
xmlRealloc((htmlParserNodeInfo *)ctxt->nodeInfoTab,
ctxt->nodeInfoMax *
sizeof(ctxt->nodeInfoTab[0]));
if (ctxt->nodeInfoTab == NULL) {
htmlErrMemory(ctxt);
return (0);
}
}
ctxt->nodeInfoTab[ctxt->nodeInfoNr] = *value;
ctxt->nodeInfo = &ctxt->nodeInfoTab[ctxt->nodeInfoNr];
return (ctxt->nodeInfoNr++);
}
/**
* htmlNodeInfoPop:
* @ctxt: an HTML parser context
*
* Pops the top element name from the node info stack
*
* Returns 0 in case of error, the pointer to NodeInfo otherwise
*/
static htmlParserNodeInfo *
htmlNodeInfoPop(htmlParserCtxtPtr ctxt)
{
if (ctxt->nodeInfoNr <= 0)
return (NULL);
ctxt->nodeInfoNr--;
if (ctxt->nodeInfoNr < 0)
return (NULL);
if (ctxt->nodeInfoNr > 0)
ctxt->nodeInfo = &ctxt->nodeInfoTab[ctxt->nodeInfoNr - 1];
else
ctxt->nodeInfo = NULL;
return &ctxt->nodeInfoTab[ctxt->nodeInfoNr];
}
/*
* 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 without newlines within the parser.
*
* Clean macros, not dependent of an ASCII context, expect UTF-8 encoding
*
* COPY(to) copy one char to *to, increment CUR_PTR and to accordingly
*/
#define UPPER (toupper(*ctxt->input->cur))
#define SKIP(val) ctxt->input->cur += (val),ctxt->input->col+=(val)
#define NXT(val) ctxt->input->cur[(val)]
#define UPP(val) (toupper(ctxt->input->cur[(val)]))
#define CUR_PTR ctxt->input->cur
#define BASE_PTR ctxt->input->base
#define SHRINK \
if ((!PARSER_PROGRESSIVE(ctxt)) && \
(ctxt->input->cur - ctxt->input->base > 2 * INPUT_CHUNK) && \
(ctxt->input->end - ctxt->input->cur < 2 * INPUT_CHUNK)) \
xmlParserShrink(ctxt);
#define GROW \
if ((!PARSER_PROGRESSIVE(ctxt)) && \
(ctxt->input->end - ctxt->input->cur < INPUT_CHUNK)) \
xmlParserGrow(ctxt);
#define SKIP_BLANKS htmlSkipBlankChars(ctxt)
/* Imported from XML */
#define CUR (*ctxt->input->cur)
/**
* htmlFindEncoding:
* @the HTML parser context
*
* Ty to find and encoding in the current data available in the input
* buffer this is needed to try to switch to the proper encoding when
* one face a character error.
* That's an heuristic, since it's operating outside of parsing it could
* try to use a meta which had been commented out, that's the reason it
* should only be used in case of error, not as a default.
*
* Returns an encoding string or NULL if not found, the string need to
* be freed
*/
static xmlChar *
htmlFindEncoding(xmlParserCtxtPtr ctxt) {
const xmlChar *start, *cur, *end;
xmlChar *ret;
if ((ctxt == NULL) || (ctxt->input == NULL) ||
(ctxt->input->flags & XML_INPUT_HAS_ENCODING))
return(NULL);
if ((ctxt->input->cur == NULL) || (ctxt->input->end == NULL))
return(NULL);
start = ctxt->input->cur;
end = ctxt->input->end;
/* we also expect the input buffer to be zero terminated */
if (*end != 0)
return(NULL);
cur = xmlStrcasestr(start, BAD_CAST "HTTP-EQUIV");
if (cur == NULL)
return(NULL);
cur = xmlStrcasestr(cur, BAD_CAST "CONTENT");
if (cur == NULL)
return(NULL);
cur = xmlStrcasestr(cur, BAD_CAST "CHARSET=");
if (cur == NULL)
return(NULL);
cur += 8;
start = cur;
while ((IS_ALNUM(*cur)) ||
(*cur == '-') || (*cur == '_') || (*cur == ':') || (*cur == '/'))
cur++;
if (cur == start)
return(NULL);
ret = xmlStrndup(start, cur - start);
if (ret == NULL)
htmlErrMemory(ctxt);
return(ret);
}
static int
htmlMaskMatch(htmlAsciiMask mask, unsigned c) {
if (c >= 64)
return(0);
return((mask[c/32] >> (c & 31)) & 1);
}
static int
htmlValidateUtf8(xmlParserCtxtPtr ctxt, const xmlChar *str, size_t len) {
unsigned c = str[0];
int size;
if (c < 0xC2) {
goto invalid;
} else if (c < 0xE0) {
if (len < 2)
goto incomplete;
if ((str[1] & 0xC0) != 0x80)
goto invalid;
size = 2;
} else if (c < 0xF0) {
unsigned v;
if (len < 3)
goto incomplete;
v = str[1] << 8 | str[2]; /* hint to generate 16-bit load */
v |= c << 16;
if (((v & 0x00C0C0) != 0x008080) ||
((v & 0x0F2000) == 0x000000) ||
((v & 0x0F2000) == 0x0D2000))
goto invalid;
size = 3;
} else {
unsigned v;
if (len < 4)
goto incomplete;
v = c << 24 | str[1] << 16 | str[2] << 8 | str[3];
if (((v & 0x00C0C0C0) != 0x00808080) ||
(v < 0xF0900000) || (v >= 0xF4900000))
goto invalid;
size = 4;
}
return(size);
incomplete:
return(0);
invalid:
/* Only report the first error */
if ((ctxt->input->flags & XML_INPUT_ENCODING_ERROR) == 0) {
htmlParseErr(ctxt, XML_ERR_INVALID_ENCODING,
"Invalid bytes in character encoding", NULL, NULL);
ctxt->input->flags |= XML_INPUT_ENCODING_ERROR;
}
return(-1);
}
/**
* 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
*/
static int
htmlSkipBlankChars(xmlParserCtxtPtr ctxt) {
const xmlChar *cur = ctxt->input->cur;
size_t avail = ctxt->input->end - cur;
int res = 0;
int line = ctxt->input->line;
int col = ctxt->input->col;
while (!PARSER_STOPPED(ctxt)) {
if (avail == 0) {
ctxt->input->cur = cur;
GROW;
cur = ctxt->input->cur;
avail = ctxt->input->end - cur;
if (avail == 0)
break;
}
if (*cur == '\n') {
line++;
col = 1;
} else if (IS_WS_HTML(*cur)) {
col++;
} else {
break;
}
cur += 1;
avail -= 1;
if (res < INT_MAX)
res++;
}
ctxt->input->cur = cur;
ctxt->input->line = line;
ctxt->input->col = col;
if (res > 8)
GROW;
return(res);
}
/************************************************************************
* *
* The list of HTML elements and their properties *
* *
************************************************************************/
/*
* Start Tag: 1 means the start tag can be omitted
* End Tag: 1 means the end tag can be omitted
* 2 means it's forbidden (empty elements)
* 3 means the tag is stylistic and should be closed easily
* 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,Save End,Empty,Deprecated,DTD,inline,Description
*/
#define DATA_RCDATA 1
#define DATA_RAWTEXT 2
#define DATA_PLAINTEXT 3
#define DATA_SCRIPT 4
#define DATA_SCRIPT_ESC1 5
#define DATA_SCRIPT_ESC2 6
static const htmlElemDesc
html40ElementTable[] = {
{ "a", 0, 0, 0, 0, 0, 0, 1, "anchor ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "abbr", 0, 0, 0, 0, 0, 0, 1, "abbreviated form",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "acronym", 0, 0, 0, 0, 0, 0, 1, "",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "address", 0, 0, 0, 0, 0, 0, 0, "information on author ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "applet", 0, 0, 0, 0, 1, 1, 2, "java applet ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "area", 0, 2, 2, 1, 0, 0, 0, "client-side image map area ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "b", 0, 3, 0, 0, 0, 0, 1, "bold text style",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "base", 0, 2, 2, 1, 0, 0, 0, "document base uri ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "basefont", 0, 2, 2, 1, 1, 1, 1, "base font size " ,
NULL, NULL, NULL, NULL, NULL,
0
},
{ "bdo", 0, 0, 0, 0, 0, 0, 1, "i18n bidi over-ride ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "big", 0, 3, 0, 0, 0, 0, 1, "large text style",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "blockquote", 0, 0, 0, 0, 0, 0, 0, "long quotation ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "body", 1, 1, 0, 0, 0, 0, 0, "document body ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "br", 0, 2, 2, 1, 0, 0, 1, "forced line break ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "button", 0, 0, 0, 0, 0, 0, 2, "push button ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "caption", 0, 0, 0, 0, 0, 0, 0, "table caption ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "center", 0, 3, 0, 0, 1, 1, 0, "shorthand for div align=center ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "cite", 0, 0, 0, 0, 0, 0, 1, "citation",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "code", 0, 0, 0, 0, 0, 0, 1, "computer code fragment",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "col", 0, 2, 2, 1, 0, 0, 0, "table column ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "colgroup", 0, 1, 0, 0, 0, 0, 0, "table column group ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "dd", 0, 1, 0, 0, 0, 0, 0, "definition description ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "del", 0, 0, 0, 0, 0, 0, 2, "deleted text ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "dfn", 0, 0, 0, 0, 0, 0, 1, "instance definition",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "dir", 0, 0, 0, 0, 1, 1, 0, "directory list",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "div", 0, 0, 0, 0, 0, 0, 0, "generic language/style container",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "dl", 0, 0, 0, 0, 0, 0, 0, "definition list ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "dt", 0, 1, 0, 0, 0, 0, 0, "definition term ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "em", 0, 3, 0, 0, 0, 0, 1, "emphasis",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "embed", 0, 1, 0, 0, 1, 1, 1, "generic embedded object ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "fieldset", 0, 0, 0, 0, 0, 0, 0, "form control group ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "font", 0, 3, 0, 0, 1, 1, 1, "local change to font ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "form", 0, 0, 0, 0, 0, 0, 0, "interactive form ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "frame", 0, 2, 2, 1, 0, 2, 0, "subwindow " ,
NULL, NULL, NULL, NULL, NULL,
0
},
{ "frameset", 0, 0, 0, 0, 0, 2, 0, "window subdivision" ,
NULL, NULL, NULL, NULL, NULL,
0
},
{ "h1", 0, 0, 0, 0, 0, 0, 0, "heading ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "h2", 0, 0, 0, 0, 0, 0, 0, "heading ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "h3", 0, 0, 0, 0, 0, 0, 0, "heading ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "h4", 0, 0, 0, 0, 0, 0, 0, "heading ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "h5", 0, 0, 0, 0, 0, 0, 0, "heading ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "h6", 0, 0, 0, 0, 0, 0, 0, "heading ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "head", 1, 1, 0, 0, 0, 0, 0, "document head ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "hr", 0, 2, 2, 1, 0, 0, 0, "horizontal rule " ,
NULL, NULL, NULL, NULL, NULL,
0
},
{ "html", 1, 1, 0, 0, 0, 0, 0, "document root element ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "i", 0, 3, 0, 0, 0, 0, 1, "italic text style",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "iframe", 0, 0, 0, 0, 0, 1, 2, "inline subwindow ",
NULL, NULL, NULL, NULL, NULL,
DATA_RAWTEXT
},
{ "img", 0, 2, 2, 1, 0, 0, 1, "embedded image ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "input", 0, 2, 2, 1, 0, 0, 1, "form control ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "ins", 0, 0, 0, 0, 0, 0, 2, "inserted text",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "isindex", 0, 2, 2, 1, 1, 1, 0, "single line prompt ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "kbd", 0, 0, 0, 0, 0, 0, 1, "text to be entered by the user",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "label", 0, 0, 0, 0, 0, 0, 1, "form field label text ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "legend", 0, 0, 0, 0, 0, 0, 0, "fieldset legend ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "li", 0, 1, 1, 0, 0, 0, 0, "list item ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "link", 0, 2, 2, 1, 0, 0, 0, "a media-independent link ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "map", 0, 0, 0, 0, 0, 0, 2, "client-side image map ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "menu", 0, 0, 0, 0, 1, 1, 0, "menu list ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "meta", 0, 2, 2, 1, 0, 0, 0, "generic metainformation ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "noembed", 0, 0, 0, 0, 0, 0, 0, "",
NULL, NULL, NULL, NULL, NULL,
DATA_RAWTEXT
},
{ "noframes", 0, 0, 0, 0, 0, 2, 0, "alternate content container for non frame-based rendering ",
NULL, NULL, NULL, NULL, NULL,
DATA_RAWTEXT
},
{ "noscript", 0, 0, 0, 0, 0, 0, 0, "alternate content container for non script-based rendering ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "object", 0, 0, 0, 0, 0, 0, 2, "generic embedded object ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "ol", 0, 0, 0, 0, 0, 0, 0, "ordered list ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "optgroup", 0, 0, 0, 0, 0, 0, 0, "option group ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "option", 0, 1, 0, 0, 0, 0, 0, "selectable choice " ,
NULL, NULL, NULL, NULL, NULL,
0
},
{ "p", 0, 1, 0, 0, 0, 0, 0, "paragraph ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "param", 0, 2, 2, 1, 0, 0, 0, "named property value ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "plaintext", 0, 0, 0, 0, 0, 0, 0, "",
NULL, NULL, NULL, NULL, NULL,
DATA_PLAINTEXT
},
{ "pre", 0, 0, 0, 0, 0, 0, 0, "preformatted text ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "q", 0, 0, 0, 0, 0, 0, 1, "short inline quotation ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "s", 0, 3, 0, 0, 1, 1, 1, "strike-through text style",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "samp", 0, 0, 0, 0, 0, 0, 1, "sample program output, scripts, etc.",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "script", 0, 0, 0, 0, 0, 0, 2, "script statements ",
NULL, NULL, NULL, NULL, NULL,
DATA_SCRIPT
},
{ "select", 0, 0, 0, 0, 0, 0, 1, "option selector ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "small", 0, 3, 0, 0, 0, 0, 1, "small text style",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "span", 0, 0, 0, 0, 0, 0, 1, "generic language/style container ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "strike", 0, 3, 0, 0, 1, 1, 1, "strike-through text",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "strong", 0, 3, 0, 0, 0, 0, 1, "strong emphasis",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "style", 0, 0, 0, 0, 0, 0, 0, "style info ",
NULL, NULL, NULL, NULL, NULL,
DATA_RAWTEXT
},
{ "sub", 0, 3, 0, 0, 0, 0, 1, "subscript",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "sup", 0, 3, 0, 0, 0, 0, 1, "superscript ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "table", 0, 0, 0, 0, 0, 0, 0, "",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "tbody", 1, 0, 0, 0, 0, 0, 0, "table body ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "td", 0, 0, 0, 0, 0, 0, 0, "table data cell",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "textarea", 0, 0, 0, 0, 0, 0, 1, "multi-line text field ",
NULL, NULL, NULL, NULL, NULL,
DATA_RCDATA
},
{ "tfoot", 0, 1, 0, 0, 0, 0, 0, "table footer ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "th", 0, 1, 0, 0, 0, 0, 0, "table header cell",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "thead", 0, 1, 0, 0, 0, 0, 0, "table header ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "title", 0, 0, 0, 0, 0, 0, 0, "document title ",
NULL, NULL, NULL, NULL, NULL,
DATA_RCDATA
},
{ "tr", 0, 0, 0, 0, 0, 0, 0, "table row ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "tt", 0, 3, 0, 0, 0, 0, 1, "teletype or monospaced text style",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "u", 0, 3, 0, 0, 1, 1, 1, "underlined text style",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "ul", 0, 0, 0, 0, 0, 0, 0, "unordered list ",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "var", 0, 0, 0, 0, 0, 0, 1, "instance of a variable or program argument",
NULL, NULL, NULL, NULL, NULL,
0
},
{ "xmp", 0, 0, 0, 0, 0, 0, 1, "",
NULL, NULL, NULL, NULL, NULL,
DATA_RAWTEXT
}
};
typedef struct {
const char *oldTag;
const char *newTag;
} htmlStartCloseEntry;
/*
* start tags that imply the end of current element
*/
static const htmlStartCloseEntry htmlStartClose[] = {
{ "a", "a" },
{ "a", "fieldset" },
{ "a", "table" },
{ "a", "td" },
{ "a", "th" },
{ "address", "dd" },
{ "address", "dl" },
{ "address", "dt" },
{ "address", "form" },
{ "address", "li" },
{ "address", "ul" },
{ "b", "center" },
{ "b", "p" },
{ "b", "td" },
{ "b", "th" },
{ "big", "p" },
{ "caption", "col" },
{ "caption", "colgroup" },
{ "caption", "tbody" },
{ "caption", "tfoot" },
{ "caption", "thead" },
{ "caption", "tr" },
{ "col", "col" },
{ "col", "colgroup" },
{ "col", "tbody" },
{ "col", "tfoot" },
{ "col", "thead" },
{ "col", "tr" },
{ "colgroup", "colgroup" },
{ "colgroup", "tbody" },
{ "colgroup", "tfoot" },
{ "colgroup", "thead" },
{ "colgroup", "tr" },
{ "dd", "dt" },
{ "dir", "dd" },
{ "dir", "dl" },
{ "dir", "dt" },
{ "dir", "form" },
{ "dir", "ul" },
{ "dl", "form" },
{ "dl", "li" },
{ "dt", "dd" },
{ "dt", "dl" },
{ "font", "center" },
{ "font", "td" },
{ "font", "th" },
{ "form", "form" },
{ "h1", "fieldset" },
{ "h1", "form" },
{ "h1", "li" },
{ "h1", "p" },
{ "h1", "table" },
{ "h2", "fieldset" },
{ "h2", "form" },
{ "h2", "li" },
{ "h2", "p" },
{ "h2", "table" },
{ "h3", "fieldset" },
{ "h3", "form" },
{ "h3", "li" },
{ "h3", "p" },
{ "h3", "table" },
{ "h4", "fieldset" },
{ "h4", "form" },
{ "h4", "li" },
{ "h4", "p" },
{ "h4", "table" },
{ "h5", "fieldset" },
{ "h5", "form" },
{ "h5", "li" },
{ "h5", "p" },
{ "h5", "table" },
{ "h6", "fieldset" },
{ "h6", "form" },
{ "h6", "li" },
{ "h6", "p" },
{ "h6", "table" },
{ "head", "a" },
{ "head", "abbr" },
{ "head", "acronym" },
{ "head", "address" },
{ "head", "b" },
{ "head", "bdo" },
{ "head", "big" },
{ "head", "blockquote" },
{ "head", "body" },
{ "head", "br" },
{ "head", "center" },
{ "head", "cite" },
{ "head", "code" },
{ "head", "dd" },
{ "head", "dfn" },
{ "head", "dir" },
{ "head", "div" },
{ "head", "dl" },
{ "head", "dt" },
{ "head", "em" },
{ "head", "fieldset" },
{ "head", "font" },