/*
* 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.
*
* daniel@veillard.com
*/
#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/memory.h"
#include "private/parser.h"
#include "private/tree.h"
#define HTML_MAX_NAMELEN 1000
#define HTML_MAX_ATTRS 100000000 /* 100 million */
#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) {
const xmlChar **tmp;
int newSize;
newSize = xmlGrowCapacity(ctxt->nameMax, sizeof(tmp[0]),
10, XML_MAX_ITEMS);
if (newSize < 0) {
htmlErrMemory(ctxt);
return (-1);
}
tmp = xmlRealloc(ctxt->nameTab, newSize * sizeof(tmp[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) {
xmlParserNodeInfo *tmp;
int newSize;
newSize = xmlGrowCapacity(ctxt->nodeInfoMax, sizeof(tmp[0]),
5, XML_MAX_ITEMS);
if (newSize < 0) {
htmlErrMemory(ctxt);
return (0);
}
tmp = xmlRealloc(ctxt->nodeInfoTab, newSize * sizeof(tmp[0]));
if (tmp == NULL) {
htmlErrMemory(ctxt);
return (0);
}
ctxt->nodeInfoTab = tmp;
ctxt->nodeInfoMax = newSize;
}
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,
int partial) {
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:
if (partial)
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" },
{ "head", "form" },
{ "head", "frameset" },
{ "head", "h1" },
{ "head", "h2" },
{ "head", "h3" },
{ "head", "h4" },
{ "head", "h5" },
{ "head", "h6" },
{ "head", "hr" },
{ "head", "i" },
{ "head", "iframe" },
{ "head", "img" },
{ "head", "kbd" },
{ "head", "li" },
{ "head", "listing" },
{ "head", "map" },
{ "head", "menu" },
{ "head", "ol" },
{ "head", "p" },
{ "head", "pre" },
{ "head", "q" },
{ "head", "s" },
{ "head", "samp" },
{ "head", "small" },
{ "head", "span" },
{ "head", "strike" },
{ "head", "strong" },
{ "head", "sub" },
{ "head", "sup" },
{ "head", "table" },
{ "head", "tt" },
{ "head", "u" },
{ "head", "ul" },
{ "head", "var" },
{ "head", "xmp" },
{ "hr", "form" },
{ "i", "center" },
{ "i", "p" },
{ "i", "td" },
{ "i", "th" },
{ "legend", "fieldset" },
{ "li", "li" },
{ "link", "body" },
{ "link", "frameset" },
{ "listing", "dd" },
{ "listing", "dl" },
{ "listing", "dt" },
{ "listing", "fieldset" },
{ "listing", "form" },
{ "listing", "li" },
{ "listing", "table" },
{ "listing", "ul" },
{ "menu", "dd" },
{ "menu", "dl" },
{ "menu", "dt" },
{ "menu", "form" },
{ "menu", "ul" },
{ "ol", "form" },
{ "option", "optgroup" },
{ "option", "option" },
{ "p", "address" },
{ "p", "blockquote" },
{ "p", "body" },
{ "p", "caption" },
{ "p", "center" },
{ "p", "col" },
{ "p", "colgroup" },
{ "p", "dd" },
{ "p", "dir" },
{ "p", "div" },
{ "p", "dl" },
{ "p", "dt" },
{ "p", "fieldset" },
{ "p", "form" },
{ "p", "frameset" },
{ "p", "h1" },
{ "p", "h2" },
{ "p", "h3" },
{ "p", "h4" },
{ "p", "h5" },
{ "p", "h6" },
{ "p", "head" },
{ "p", "hr" },
{ "p", "li" },
{ "p", "listing" },
{ "p", "menu" },
{ "p", "ol" },
{ "p", "p" },
{ "p", "pre" },
{ "p", "table" },
{ "p", "tbody" },
{ "p", "td" },
{ "p", "tfoot" },
{ "p", "th" },
{ "p", "title" },
{ "p", "tr" },
{ "p", "ul" },
{ "p", "xmp" },
{ "pre", "dd" },
{ "pre", "dl" },
{ "pre", "dt" },
{ "pre", "fieldset" },
{ "pre", "form" },
{ "pre", "li" },
{ "pre", "table" },
{ "pre", "ul" },
{ "s", "p" },
{ "script", "noscript" },
{ "small", "p" },
{ "span", "td" },
{ "span", "th" },
{ "strike", "p" },
{ "style", "body" },
{ "style", "frameset" },
{ "tbody", "tbody" },
{ "tbody", "tfoot" },
{ "td", "tbody" },
{ "td", "td" },
{ "td", "tfoot" },
{ "td", "th" },
{ "td", "tr" },
{ "tfoot", "tbody" },
{ "th", "tbody" },
{ "th", "td" },
{ "th", "tfoot" },
{ "th", "th" },
{ "th", "tr" },
{ "thead", "tbody" },
{ "thead", "tfoot" },
{ "title", "body" },
{ "title", "frameset" },
{ "tr", "tbody" },
{ "tr", "tfoot" },
{ "tr", "tr" },
{ "tt", "p" },
{ "u", "p" },
{ "u", "td" },
{ "u", "th" },
{ "ul", "address" },
{ "ul", "form" },
{ "ul", "menu" },
{ "ul", "pre" },
{ "xmp", "dd" },
{ "xmp", "dl" },
{ "xmp", "dt" },
{ "xmp", "fieldset" },
{ "xmp", "form" },
{ "xmp", "li" },
{ "xmp", "table" },
{ "xmp", "ul" }
};
/*
* The list of HTML elements which are supposed not to have
* CDATA content and where a p element will be implied
*
* TODO: extend that list by reading the HTML SGML DTD on
* implied paragraph
*/
static const char *const htmlNoContentElements[] = {
"html",
"head",
NULL
};
/*
* The list of HTML attributes which are of content %Script;
* NOTE: when adding ones, check htmlIsScriptAttribute() since
* it assumes the name starts with 'on'
*/
static const char *const htmlScriptAttributes[] = {
"onclick",
"ondblclick",
"onmousedown",
"onmouseup",
"onmouseover",
"onmousemove",
"onmouseout",
"onkeypress",
"onkeydown",
"onkeyup",
"onload",
"onunload",
"onfocus",
"onblur",
"onsubmit",
"onreset",
"onchange",
"onselect"
};
/*
* This table is used by the htmlparser to know what to do with
* broken html pages. By assigning different priorities to different
* elements the parser can decide how to handle extra endtags.
* Endtags are only allowed to close elements with lower or equal
* priority.
*/
typedef struct {
const char *name;
int priority;
} elementPriority;
static const elementPriority htmlEndPriority[] = {
{"div", 150},
{"td", 160},
{"th", 160},
{"tr", 170},
{"thead", 180},
{"tbody", 180},
{"tfoot", 180},
{"table", 190},
{"head", 200},
{"body", 200},
{"html", 220},
{NULL, 100} /* Default priority */
};
/************************************************************************
* *
* functions to handle HTML specific data *
* *
************************************************************************/
static void
htmlParserFinishElementParsing(htmlParserCtxtPtr ctxt) {
/*
* Capture end position and add node
*/
if ( ctxt->node != NULL && ctxt->record_info ) {
ctxt->nodeInfo->end_pos = ctxt->input->consumed +
(CUR_PTR - ctxt->input->base);
ctxt->nodeInfo->end_line = ctxt->input->line;
ctxt->nodeInfo->node = ctxt->node;
xmlParserAddNodeInfo(ctxt, ctxt->nodeInfo);
htmlNodeInfoPop(ctxt);
}
}
/**
* htmlInitAutoClose:
*
* DEPRECATED: This is a no-op.
*/
void
htmlInitAutoClose(void) {
}
static int
htmlCompareTags(const void *key, const void *member) {
const xmlChar *tag = (const xmlChar *) key;
const htmlElemDesc *desc = (const htmlElemDesc *) member;
return(xmlStrcasecmp(tag, BAD_CAST desc->name));
}
/**
* htmlTagLookup:
* @tag: The tag name in lowercase
*
* Lookup the HTML tag in the ElementTable
*
* Returns the related htmlElemDescPtr or NULL if not found.
*/
const htmlElemDesc *
htmlTagLookup(const xmlChar *tag) {
if (tag == NULL)
return(NULL);
return((const htmlElemDesc *) bsearch(tag, html40ElementTable,
sizeof(html40ElementTable) / sizeof(htmlElemDesc),
sizeof(htmlElemDesc), htmlCompareTags));
}
/**
* htmlGetEndPriority:
* @name: The name of the element to look up the priority for.
*
* Return value: The "endtag" priority.
**/
static int
htmlGetEndPriority (const xmlChar *name) {
int i = 0;
while ((htmlEndPriority[i].name != NULL) &&
(!xmlStrEqual((const xmlChar *)htmlEndPriority[i].name, name)))
i++;
return(htmlEndPriority[i].priority);
}
static int
htmlCompareStartClose(const void *vkey, const void *member) {
const htmlStartCloseEntry *key = (const htmlStartCloseEntry *) vkey;
const htmlStartCloseEntry *entry = (const htmlStartCloseEntry *) member;
int ret;
ret = strcmp(key->oldTag, entry->oldTag);
if (ret == 0)
ret = strcmp(key->newTag, entry->newTag);
return(ret);
}
/**
* htmlCheckAutoClose:
* @newtag: The new tag name
* @oldtag: The old tag name
*
* Checks whether the new tag is one of the registered valid tags for
* closing old.
*
* Returns 0 if no, 1 if yes.
*/
static int
htmlCheckAutoClose(const xmlChar * newtag, const xmlChar * oldtag)
{
htmlStartCloseEntry key;
void *res;
key.oldTag = (const char *) oldtag;
key.newTag = (const char *) newtag;
res = bsearch(&key, htmlStartClose,
sizeof(htmlStartClose) / sizeof(htmlStartCloseEntry),
sizeof(htmlStartCloseEntry), htmlCompareStartClose);
return(res != NULL);
}
/**
* htmlAutoCloseOnClose:
* @ctxt: an HTML parser context
* @newtag: The new tag name
* @force: force the tag closure
*
* The HTML DTD allows an ending tag to implicitly close other tags.
*/
static void
htmlAutoCloseOnClose(htmlParserCtxtPtr ctxt, const xmlChar * newtag)
{
const htmlElemDesc *info;
int i, priority;
if (ctxt->options & HTML_PARSE_HTML5)
return;
priority = htmlGetEndPriority(newtag);
for (i = (ctxt->nameNr - 1); i >= 0; i--) {
if (xmlStrEqual(newtag, ctxt->nameTab[i]))
break;
/*
* A misplaced endtag can only close elements with lower
* or equal priority, so if we find an element with higher
* priority before we find an element with
* matching name, we just ignore this endtag
*/
if (htmlGetEndPriority(ctxt->nameTab[i]) > priority)
return;
}
if (i < 0)
return;
while (!xmlStrEqual(newtag, ctxt->name)) {
info = htmlTagLookup(ctxt->name);
if ((info != NULL) && (info->endTag == 3)) {
htmlParseErr(ctxt, XML_ERR_TAG_NAME_MISMATCH,
"Opening and ending tag mismatch: %s and %s\n",
newtag, ctxt->name);
}
htmlParserFinishElementParsing(ctxt);
if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL))
ctxt->sax->endElement(ctxt->userData, ctxt->name);
htmlnamePop(ctxt);
}
}
/**
* htmlAutoCloseOnEnd:
* @ctxt: an HTML parser context
*
* Close all remaining tags at the end of the stream
*/
static void
htmlAutoCloseOnEnd(htmlParserCtxtPtr ctxt)
{
int i;
if (ctxt->options & HTML_PARSE_HTML5)
return;
if (ctxt->nameNr == 0)
return;
for (i = (ctxt->nameNr - 1); i >= 0; i--) {
htmlParserFinishElementParsing(ctxt);
if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL))
ctxt->sax->endElement(ctxt->userData, ctxt->name);
htmlnamePop(ctxt);
}
}
/**
* htmlAutoClose:
* @ctxt: an HTML parser context
* @newtag: The new tag name or NULL
*
* The HTML DTD allows a tag to implicitly close other tags.
* The list is kept in htmlStartClose array. This function is
* called when a new tag has been detected and generates the
* appropriates closes if possible/needed.
* If newtag is NULL this mean we are at the end of the resource
* and we should check
*/
static void
htmlAutoClose(htmlParserCtxtPtr ctxt, const xmlChar * newtag)
{
if (ctxt->options & HTML_PARSE_HTML5)
return;
if (newtag == NULL)
return;
while ((ctxt->name != NULL) &&
(htmlCheckAutoClose(newtag, ctxt->name))) {
htmlParserFinishElementParsing(ctxt);
if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL))
ctxt->sax->endElement(ctxt->userData, ctxt->name);
htmlnamePop(ctxt);
}
}
/**
* htmlAutoCloseTag:
* @doc: the HTML document
* @name: The tag name
* @elem: the HTML element
*
* DEPRECATED: Internal function, don't use.
*
* The HTML DTD allows a tag to implicitly close other tags.
* The list is kept in htmlStartClose array. This function checks
* if the element or one of it's children would autoclose the
* given tag.
*
* Returns 1 if autoclose, 0 otherwise
*/
int
htmlAutoCloseTag(htmlDocPtr doc, const xmlChar *name, htmlNodePtr elem) {
htmlNodePtr child;
if (elem == NULL) return(1);
if (xmlStrEqual(name, elem->name)) return(0);
if (htmlCheckAutoClose(elem->name, name)) return(1);
child = elem->children;
while (child != NULL) {
if (htmlAutoCloseTag(doc, name, child)) return(1);
child = child->next;
}
return(0);
}
/**
* htmlIsAutoClosed:
* @doc: the HTML document
* @elem: the HTML element
*
* DEPRECATED: Internal function, don't use.
*
* The HTML DTD allows a tag to implicitly close other tags.
* The list is kept in htmlStartClose array. This function checks
* if a tag is autoclosed by one of it's child
*
* Returns 1 if autoclosed, 0 otherwise
*/
int
htmlIsAutoClosed(htmlDocPtr doc, htmlNodePtr elem) {
htmlNodePtr child;
if (elem == NULL) return(1);
child = elem->children;
while (child != NULL) {
if (htmlAutoCloseTag(doc, elem->name, child)) return(1);
child = child->next;
}
return(0);
}
/**
* htmlCheckImplied:
* @ctxt: an HTML parser context
* @newtag: The new tag name
*
* The HTML DTD allows a tag to exists only implicitly
* called when a new tag has been detected and generates the
* appropriates implicit tags if missing
*/
static void
htmlCheckImplied(htmlParserCtxtPtr ctxt, const xmlChar *newtag) {
int i;
if (ctxt->options & (HTML_PARSE_NOIMPLIED | HTML_PARSE_HTML5))
return;
if (!htmlOmittedDefaultValue)
return;
if (xmlStrEqual(newtag, BAD_CAST"html"))
return;
if (ctxt->nameNr <= 0) {
htmlnamePush(ctxt, BAD_CAST"html");
if ((ctxt->sax != NULL) && (ctxt->sax->startElement != NULL))
ctxt->sax->startElement(ctxt->userData, BAD_CAST"html", NULL);
}
if ((xmlStrEqual(newtag, BAD_CAST"body")) || (xmlStrEqual(newtag, BAD_CAST"head")))
return;
if ((ctxt->nameNr <= 1) &&
((xmlStrEqual(newtag, BAD_CAST"script")) ||
(xmlStrEqual(newtag, BAD_CAST"style")) ||
(xmlStrEqual(newtag, BAD_CAST"meta")) ||
(xmlStrEqual(newtag, BAD_CAST"link")) ||
(xmlStrEqual(newtag, BAD_CAST"title")) ||
(xmlStrEqual(newtag, BAD_CAST"base")))) {
if (ctxt->html >= 3) {
/* we already saw or generated an <head> before */
return;
}
/*
* dropped OBJECT ... i you put it first BODY will be
* assumed !
*/
htmlnamePush(ctxt, BAD_CAST"head");
if ((ctxt->sax != NULL) && (ctxt->sax->startElement != NULL))
ctxt->sax->startElement(ctxt->userData, BAD_CAST"head", NULL);
} else if ((!xmlStrEqual(newtag, BAD_CAST"noframes")) &&
(!xmlStrEqual(newtag, BAD_CAST"frame")) &&
(!xmlStrEqual(newtag, BAD_CAST"frameset"))) {
if (ctxt->html >= 10) {
/* we already saw or generated a <body> before */
return;
}
for (i = 0;i < ctxt->nameNr;i++) {
if (xmlStrEqual(ctxt->nameTab[i], BAD_CAST"body")) {
return;
}
if (xmlStrEqual(ctxt->nameTab[i], BAD_CAST"head")) {
return;
}
}
htmlnamePush(ctxt, BAD_CAST"body");
if ((ctxt->sax != NULL) && (ctxt->sax->startElement != NULL))
ctxt->sax->startElement(ctxt->userData, BAD_CAST"body", NULL);
}
}
/**
* htmlCheckParagraph
* @ctxt: an HTML parser context
*
* Check whether a p element need to be implied before inserting
* characters in the current element.
*
* Returns 1 if a paragraph has been inserted, 0 if not and -1
* in case of error.
*/
static int
htmlCheckParagraph(htmlParserCtxtPtr ctxt) {
const xmlChar *tag;
int i;
if (ctxt == NULL)
return(-1);
if (ctxt->options & HTML_PARSE_HTML5)
return(0);
tag = ctxt->name;
if (tag == NULL) {
htmlAutoClose(ctxt, BAD_CAST"p");
htmlCheckImplied(ctxt, BAD_CAST"p");
htmlnamePush(ctxt, BAD_CAST"p");
if ((ctxt->sax != NULL) && (ctxt->sax->startElement != NULL))
ctxt->sax->startElement(ctxt->userData, BAD_CAST"p", NULL);
return(1);
}
if (!htmlOmittedDefaultValue)
return(0);
for (i = 0; htmlNoContentElements[i] != NULL; i++) {
if (xmlStrEqual(tag, BAD_CAST htmlNoContentElements[i])) {
htmlAutoClose(ctxt, BAD_CAST"p");
htmlCheckImplied(ctxt, BAD_CAST"p");
htmlnamePush(ctxt, BAD_CAST"p");
if ((ctxt->sax != NULL) && (ctxt->sax->startElement != NULL))
ctxt->sax->startElement(ctxt->userData, BAD_CAST"p", NULL);
return(1);
}
}
return(0);
}
/**
* htmlIsScriptAttribute:
* @name: an attribute name
*
* Check if an attribute is of content type Script
*
* Returns 1 is the attribute is a script 0 otherwise
*/
int
htmlIsScriptAttribute(const xmlChar *name) {
unsigned int i;
if (name == NULL)
return(0);
/*
* all script attributes start with 'on'
*/
if ((name[0] != 'o') || (name[1] != 'n'))
return(0);
for (i = 0;
i < sizeof(htmlScriptAttributes)/sizeof(htmlScriptAttributes[0]);
i++) {
if (xmlStrEqual(name, (const xmlChar *) htmlScriptAttributes[i]))
return(1);
}
return(0);
}
/************************************************************************
* *
* The list of HTML predefined entities *
* *
************************************************************************/
static const htmlEntityDesc html40EntitiesTable[] = {
/*
* the 4 absolute ones, plus apostrophe.
*/
{ 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" },
{ 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" },
/*
* Anything below should really be kept as entities references
*/
{ 402, "fnof", "latin small f with hook = function = florin, U+0192 ISOtech" },
{ 710, "circ", "modifier letter circumflex accent, U+02C6 ISOpub" },
{ 732, "tilde","small tilde, U+02DC ISOdia" },
{ 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" },
{ 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" },
{ 8226, "bull", "bullet = black small circle, U+2022 ISOpub" },
{ 8230, "hellip","horizontal ellipsis = three dot leader, U+2026 ISOpub" },
{ 8240, "permil","per mille sign, U+2030 ISOtech" },
{ 8242, "prime","prime = minutes = feet, U+2032 ISOtech" },
{ 8243, "Prime","double prime = seconds = inches, U+2033 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" },
{ 8254, "oline","overline = spacing overscore, U+203E NEW" },
{ 8260, "frasl","fraction slash, U+2044 NEW" },
{ 8364, "euro", "euro sign, U+20AC NEW" },
{ 8465, "image","blackletter capital I = imaginary part, U+2111 ISOamso" },
{ 8472, "weierp","script capital P = power set = Weierstrass p, U+2118 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 summation, 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" },
};
/************************************************************************
* *
* Commodity functions to handle entities *
* *
************************************************************************/
/**
* 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.
*/
const htmlEntityDesc *
htmlEntityLookup(const xmlChar *name) {
unsigned int i;
for (i = 0;i < (sizeof(html40EntitiesTable)/
sizeof(html40EntitiesTable[0]));i++) {
if (xmlStrEqual(name, BAD_CAST html40EntitiesTable[i].name)) {
return((htmlEntityDescPtr) &html40EntitiesTable[i]);
}
}
return(NULL);
}
static int
htmlCompareEntityDesc(const void *vkey, const void *vdesc) {
const unsigned *key = vkey;
const htmlEntityDesc *desc = vdesc;
return((int) *key - (int) desc->value);
}
/**
* htmlEntityValueLookup:
* @value: the entity's unicode value
*
* 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.
*/
const htmlEntityDesc *
htmlEntityValueLookup(unsigned int value) {
const htmlEntityDesc *desc;
size_t nmemb;
nmemb = sizeof(html40EntitiesTable) / sizeof(html40EntitiesTable[0]);
desc = bsearch(&value, html40EntitiesTable, nmemb, sizeof(htmlEntityDesc),
htmlCompareEntityDesc);
return(desc);
}
/**
* UTF8ToHtml:
* @out: a pointer to an array of bytes to store the result
* @outlen: the length of @out
* @in: a pointer to an array of UTF-8 chars
* @inlen: the length of @in
*
* Take a block of UTF-8 chars in and try to convert it to an ASCII
* plus HTML entities block of chars out.
*
* Returns 0 if success, -2 if the transcoding fails, or -1 otherwise
* The value of @inlen after return is the number of octets consumed
* as the return value is positive, else unpredictable.
* The value of @outlen after return is the number of octets consumed.
*/
int
UTF8ToHtml(unsigned char* out, int *outlen,
const unsigned char* in, int *inlen) {
const unsigned char* instart = in;
const unsigned char* inend;
unsigned char* outstart = out;
unsigned char* outend;
int ret = XML_ENC_ERR_SPACE;
if ((out == NULL) || (outlen == NULL) || (inlen == NULL))
return(XML_ENC_ERR_INTERNAL);
if (in == NULL) {
/*
* initialization nothing to do
*/
*outlen = 0;
*inlen = 0;
return(XML_ENC_ERR_SUCCESS);
}
inend = in + *inlen;
outend = out + *outlen;
while (in < inend) {
const htmlEntityDesc *ent;
const char *cp;
char nbuf[16];
unsigned c, d;
int seqlen, len, i;
d = *in;
if (d < 0x80) {
if (out >= outend)
goto done;
*out++ = d;
in += 1;
continue;
}
if (d < 0xE0) { c = d & 0x1F; seqlen = 2; }
else if (d < 0xF0) { c = d & 0x0F; seqlen = 3; }
else { c = d & 0x07; seqlen = 4; }
if (inend - in < seqlen)
break;
for (i = 1; i < seqlen; i++) {
d = in[i];
c <<= 6;
c |= d & 0x3F;
}
/*
* Try to lookup a predefined HTML entity for it
*/
ent = htmlEntityValueLookup(c);
if (ent == NULL) {
snprintf(nbuf, sizeof(nbuf), "#%u", c);
cp = nbuf;
} else {
cp = ent->name;
}
len = strlen(cp);
if (outend - out < len + 2)
goto done;
*out++ = '&';
memcpy(out, cp, len);
out += len;
*out++ = ';';
in += seqlen;
}
ret = out - outstart;
done:
*outlen = out - outstart;
*inlen = in - instart;
return(ret);
}
/**
* htmlEncodeEntities:
* @out: a pointer to an array of bytes to store the result
* @outlen: the length of @out
* @in: a pointer to an array of UTF-8 chars
* @inlen: the length of @in
* @quoteChar: the quote character to escape (' or ") or zero.
*
* Take a block of UTF-8 chars in and try to convert it to an ASCII
* plus HTML entities block of chars out.
*
* Returns 0 if success, -2 if the transcoding fails, or -1 otherwise
* The value of @inlen after return is the number of octets consumed
* as the return value is positive, else unpredictable.
* The value of @outlen after return is the number of octets consumed.
*/
int
htmlEncodeEntities(unsigned char* out, int *outlen,
const unsigned char* in, int *inlen, int quoteChar) {
const unsigned char* processed = in;
const unsigned char* outend;
const unsigned char* outstart = out;
const unsigned char* instart = in;
const unsigned char* inend;
unsigned int c, d;
int trailing;
if ((out == NULL) || (outlen == NULL) || (inlen == NULL) || (in == NULL))
return(-1);
outend = out + (*outlen);
inend = in + (*inlen);
while (in < inend) {
d = *in++;
if (d < 0x80) { c= d; trailing= 0; }
else if (d < 0xC0) {
/* trailing byte in leading position */
*outlen = out - outstart;
*inlen = processed - instart;
return(-2);
} else if (d < 0xE0) { c= d & 0x1F; trailing= 1; }
else if (d < 0xF0) { c= d & 0x0F; trailing= 2; }
else if (d < 0xF8) { c= d & 0x07; trailing= 3; }
else {
/* no chance for this in Ascii */
*outlen = out - outstart;
*inlen = processed - instart;
return(-2);
}
if (inend - in < trailing)
break;
while (trailing--) {
if (((d= *in++) & 0xC0) != 0x80) {
*outlen = out - outstart;
*inlen = processed - instart;
return(-2);
}
c <<= 6;
c |= d & 0x3F;
}
/* assertion: c is a single UTF-4 value */
if ((c < 0x80) && (c != (unsigned int) quoteChar) &&
(c != '&') && (c != '<') && (c != '>')) {
if (out >= outend)
break;
*out++ = c;
} else {
const htmlEntityDesc * ent;
const char *cp;
char nbuf[16];
int len;
/*
* Try to lookup a predefined HTML entity for it
*/
ent = htmlEntityValueLookup(c);
if (ent == NULL) {
snprintf(nbuf, sizeof(nbuf), "#%u", c);
cp = nbuf;
}
else
cp = ent->name;
len = strlen(cp);
if (outend - out < len + 2)
break;
*out++ = '&';
memcpy(out, cp, len);
out += len;
*out++ = ';';
}
processed = in;
}
*outlen = out - outstart;
*inlen = processed - instart;
return(0);
}
/************************************************************************
* *
* Commodity functions, cleanup needed ? *
* *
************************************************************************/
/*
* all tags allowing pc data from the html 4.01 loose dtd
* NOTE: it might be more appropriate to integrate this information
* into the html40ElementTable array but I don't want to risk any
* binary incompatibility
*/
static const char *allowPCData[] = {
"a", "abbr", "acronym", "address", "applet", "b", "bdo", "big",
"blockquote", "body", "button", "caption", "center", "cite", "code",
"dd", "del", "dfn", "div", "dt", "em", "font", "form", "h1", "h2",
"h3", "h4", "h5", "h6", "i", "iframe", "ins", "kbd", "label", "legend",
"li", "noframes", "noscript", "object", "p", "pre", "q", "s", "samp",
"small", "span", "strike", "strong", "td", "th", "tt", "u", "var"
};
/**
* areBlanks:
* @ctxt: an HTML parser context
* @str: a xmlChar *
* @len: the size of @str
*
* Is this a sequence of blank chars that one can ignore ?
*
* Returns 1 if ignorable 0 if whitespace, -1 otherwise.
*/
static int areBlanks(htmlParserCtxtPtr ctxt, const xmlChar *str, int len) {
unsigned int i;
int j;
xmlNodePtr lastChild;
xmlDtdPtr dtd;
for (j = 0;j < len;j++)
if (!(IS_WS_HTML(str[j]))) return(-1);
if (CUR == 0) return(1);
if (CUR != '<') return(0);
if (ctxt->name == NULL)
return(1);
if (xmlStrEqual(ctxt->name, BAD_CAST"html"))
return(1);
if (xmlStrEqual(ctxt->name, BAD_CAST"head"))
return(1);
/* Only strip CDATA children of the body tag for strict HTML DTDs */
if (xmlStrEqual(ctxt->name, BAD_CAST "body") && ctxt->myDoc != NULL) {
dtd = xmlGetIntSubset(ctxt->myDoc);
if (dtd != NULL && dtd->ExternalID != NULL) {
if (!xmlStrcasecmp(dtd->ExternalID, BAD_CAST "-//W3C//DTD HTML 4.01//EN") ||
!xmlStrcasecmp(dtd->ExternalID, BAD_CAST "-//W3C//DTD HTML 4//EN"))
return(1);
}
}
if (ctxt->node == NULL) return(0);
lastChild = xmlGetLastChild(ctxt->node);
while ((lastChild) && (lastChild->type == XML_COMMENT_NODE))
lastChild = lastChild->prev;
if (lastChild == NULL) {
if ((ctxt->node->type != XML_ELEMENT_NODE) &&
(ctxt->node->content != NULL)) return(0);
/* keep ws in constructs like ...<b> </b>...
for all tags "b" allowing PCDATA */
for ( i = 0; i < sizeof(allowPCData)/sizeof(allowPCData[0]); i++ ) {
if ( xmlStrEqual(ctxt->name, BAD_CAST allowPCData[i]) ) {
return(0);
}
}
} else if (xmlNodeIsText(lastChild)) {
return(0);
} else {
/* keep ws in constructs like <p><b>xy</b> <i>z</i><p>
for all tags "p" allowing PCDATA */
for ( i = 0; i < sizeof(allowPCData)/sizeof(allowPCData[0]); i++ ) {
if ( xmlStrEqual(lastChild->name, BAD_CAST allowPCData[i]) ) {
return(0);
}
}
}
return(1);
}
/**
* htmlNewDocNoDtD:
* @URI: URI for the dtd, or NULL
* @ExternalID: the external ID of the DTD, or NULL
*
* Creates a new HTML document without a DTD node if @URI and @ExternalID
* are NULL
*
* Returns a new document, do not initialize the DTD if not provided
*/
htmlDocPtr
htmlNewDocNoDtD(const xmlChar *URI, const xmlChar *ExternalID) {
xmlDocPtr cur;
/*
* Allocate a new document and fill the fields.
*/
cur = (xmlDocPtr) xmlMalloc(sizeof(xmlDoc));
if (cur == NULL)
return(NULL);
memset(cur, 0, sizeof(xmlDoc));
cur->type = XML_HTML_DOCUMENT_NODE;
cur->version = NULL;
cur->intSubset = NULL;
cur->doc = cur;
cur->name = NULL;
cur->children = NULL;
cur->extSubset = NULL;
cur->oldNs = NULL;
cur->encoding = NULL;
cur->standalone = 1;
cur->compression = 0;
cur->ids = NULL;
cur->refs = NULL;
cur->_private = NULL;
cur->charset = XML_CHAR_ENCODING_UTF8;
cur->properties = XML_DOC_HTML | XML_DOC_USERBUILT;
if ((ExternalID != NULL) ||
(URI != NULL)) {
xmlDtdPtr intSubset;
intSubset = xmlCreateIntSubset(cur, BAD_CAST "html", ExternalID, URI);
if (intSubset == NULL) {
xmlFree(cur);
return(NULL);
}
}
if ((xmlRegisterCallbacks) && (xmlRegisterNodeDefaultValue))
xmlRegisterNodeDefaultValue((xmlNodePtr)cur);
return(cur);
}
/**
* htmlNewDoc:
* @URI: URI for the dtd, or NULL
* @ExternalID: the external ID of the DTD, or NULL
*
* Creates a new HTML document
*
* Returns a new document
*/
htmlDocPtr
htmlNewDoc(const xmlChar *URI, const xmlChar *ExternalID) {
if ((URI == NULL) && (ExternalID == NULL))
return(htmlNewDocNoDtD(
BAD_CAST "http://www.w3.org/TR/REC-html40/loose.dtd",
BAD_CAST "-//W3C//DTD HTML 4.0 Transitional//EN"));
return(htmlNewDocNoDtD(URI, ExternalID));
}
/************************************************************************
* *
* The parser itself *
* Relates to http://www.w3.org/TR/html40 *
* *
************************************************************************/
/************************************************************************
* *
* The parser itself *
* *
************************************************************************/
/**
* htmlParseHTMLName:
* @ctxt: an HTML parser context
*
* parse an HTML tag or attribute name, note that we convert it to lowercase
* since HTML names are not case-sensitive.
*
* Returns the Tag Name parsed or NULL
*/
static xmlHashedString
htmlParseHTMLName(htmlParserCtxtPtr ctxt, int attr) {
xmlHashedString ret;
xmlChar buf[HTML_PARSER_BUFFER_SIZE];
const xmlChar *in;
size_t avail;
int eof = PARSER_PROGRESSIVE(ctxt);
int nbchar = 0;
int stop = attr ? '=' : ' ';
in = ctxt->input->cur;
avail = ctxt->input->end - in;
while (1) {
int c, size;
if ((!eof) && (avail < 32)) {
size_t oldAvail = avail;
ctxt->input->cur = in;
SHRINK;
xmlParserGrow(ctxt);
in = ctxt->input->cur;
avail = ctxt->input->end - in;
if (oldAvail == avail)
eof = 1;
}
if (avail == 0)
break;
c = *in;
size = 1;
if ((nbchar != 0) &&
((c == '/') || (c == '>') || (c == stop) ||
(IS_WS_HTML(c))))
break;
if (c == 0) {
if (nbchar + 3 <= HTML_PARSER_BUFFER_SIZE) {
buf[nbchar++] = 0xEF;
buf[nbchar++] = 0xBF;
buf[nbchar++] = 0xBD;
}
} else if (c < 0x80) {
if (nbchar < HTML_PARSER_BUFFER_SIZE) {
if (IS_UPPER(c))
c += 0x20;
buf[nbchar++] = c;
}
} else {
size = htmlValidateUtf8(ctxt, in, avail, /* partial */ 0);
if (size > 0) {
if (nbchar + size <= HTML_PARSER_BUFFER_SIZE) {
memcpy(buf + nbchar, in, size);
nbchar += size;
}
} else {
size = 1;
if (nbchar + 3 <= HTML_PARSER_BUFFER_SIZE) {
buf[nbchar++] = 0xEF;
buf[nbchar++] = 0xBF;
buf[nbchar++] = 0xBD;
}
}
}
in += size;
avail -= size;
}
ctxt->input->cur = in;
SHRINK;
ret = xmlDictLookupHashed(ctxt->dict, buf, nbchar);
if (ret.name == NULL)
htmlErrMemory(ctxt);
return(ret);
}
static const short htmlC1Remap[32] = {
0x20AC, 0x0081, 0x201A, 0x0192, 0x201E, 0x2026, 0x2020, 0x2021,
0x02C6, 0x2030, 0x0160, 0x2039, 0x0152, 0x008D, 0x017D, 0x008F,
0x0090, 0x2018, 0x2019, 0x201C, 0x201D, 0x2022, 0x2013, 0x2014,
0x02DC, 0x2122, 0x0161, 0x203A, 0x0153, 0x009D, 0x017E, 0x0178
};
static const xmlChar *
htmlCodePointToUtf8(int c, xmlChar *out, int *osize) {
int i = 0;
int bits, hi;
if ((c >= 0x80) && (c < 0xA0)) {
c = htmlC1Remap[c - 0x80];
} else if ((c <= 0) ||
((c >= 0xD800) && (c < 0xE000)) ||
(c > 0x10FFFF)) {
c = 0xFFFD;
}
if (c < 0x80) { bits = 0; hi = 0x00; }
else if (c < 0x800) { bits = 6; hi = 0xC0; }
else if (c < 0x10000) { bits = 12; hi = 0xE0; }
else { bits = 18; hi = 0xF0; }
out[i++] = (c >> bits) | hi;
while (bits > 0) {
bits -= 6;
out[i++] = ((c >> bits) & 0x3F) | 0x80;
}
*osize = i;
return(out);
}
#include "html5ent.inc"
#define ENT_F_SEMICOLON 0x80u
#define ENT_F_SUBTABLE 0x40u
#define ENT_F_ALL 0xC0u
static const xmlChar *
htmlFindEntityPrefix(const xmlChar *string, size_t slen, int isAttr,
int *nlen, int *rlen) {
const xmlChar *match = NULL;
unsigned left, right;
int first = string[0];
size_t matchLen = 0;
size_t soff = 1;
if (slen < 2)
return(NULL);
if (!IS_ASCII_LETTER(first))
return(NULL);
/*
* Look up range by first character
*/
first &= 63;
left = htmlEntAlpha[first*3] | htmlEntAlpha[first*3+1] << 8;
right = left + htmlEntAlpha[first*3+2];
/*
* Binary search
*/
while (left < right) {
const xmlChar *bytes;
unsigned mid;
size_t len;
int cmp;
mid = left + (right - left) / 2;
bytes = htmlEntStrings + htmlEntValues[mid];
len = bytes[0] & ~ENT_F_ALL;
cmp = string[soff] - bytes[1];
if (cmp == 0) {
if (slen < len) {
cmp = strncmp((const char *) string + soff + 1,
(const char *) bytes + 2,
slen - 1);
/* Prefix can never match */
if (cmp == 0)
break;
} else {
cmp = strncmp((const char *) string + soff + 1,
(const char *) bytes + 2,
len - 1);
}
}
if (cmp < 0) {
right = mid;
} else if (cmp > 0) {
left = mid + 1;
} else {
int term = soff + len < slen ? string[soff + len] : 0;
int isAlnum, isTerm;
isAlnum = IS_ALNUM(term);
isTerm = ((term == ';') ||
((bytes[0] & ENT_F_SEMICOLON) &&
((!isAttr) ||
((!isAlnum) && (term != '=')))));
if (isTerm) {
match = bytes + len + 1;
matchLen = soff + len;
if (term == ';')
matchLen += 1;
}
if (bytes[0] & ENT_F_SUBTABLE) {
if (isTerm)
match += 2;
if ((isAlnum) && (soff + len < slen)) {
left = mid + bytes[len + 1];
right = left + bytes[len + 2];
soff += len;
continue;
}
}
break;
}
}
if (match == NULL)
return(NULL);
*nlen = matchLen;
*rlen = match[0];
return(match + 1);
}
/**
* htmlParseData:
* @ctxt: an HTML parser context
* @mask: mask of terminating characters
* @comment: true if parsing a comment
* @refs: true if references are allowed
* @maxLength: maximum output length
*
* Parse data until terminator is reached.
*
* Returns the parsed string or NULL in case of errors.
*/
static xmlChar *
htmlParseData(htmlParserCtxtPtr ctxt, htmlAsciiMask mask,
int comment, int refs, int maxLength) {
xmlParserInputPtr input = ctxt->input;
xmlChar *ret = NULL;
xmlChar *buffer;
xmlChar utf8Char[4];
size_t buffer_size;
size_t used;
int eof = PARSER_PROGRESSIVE(ctxt);
int line, col;
int termSkip = -1;
used = 0;
buffer_size = ctxt->spaceMax;
buffer = (xmlChar *) ctxt->spaceTab;
if (buffer == NULL) {
buffer_size = 500;
buffer = xmlMalloc(buffer_size + 1);
if (buffer == NULL) {
htmlErrMemory(ctxt);
return(NULL);
}
}
line = input->line;
col = input->col;
while (!PARSER_STOPPED(ctxt)) {
const xmlChar *chunk, *in, *repl;
size_t avail, chunkSize, extraSize;
int replSize;
int skip = 0;
int ncr = 0;
int ncrSize = 0;
int cp = 0;
chunk = input->cur;
avail = input->end - chunk;
in = chunk;
repl = BAD_CAST "";
replSize = 0;
while (!PARSER_STOPPED(ctxt)) {
size_t j;
int cur, size;
if ((!eof) && (avail <= 64)) {
size_t oldAvail = avail;
size_t off = in - chunk;
input->cur = in;
xmlParserGrow(ctxt);
in = input->cur;
chunk = in - off;
input->cur = chunk;
avail = input->end - in;
if (oldAvail == avail)
eof = 1;
}
if (avail == 0) {
termSkip = 0;
break;
}
cur = *in;
size = 1;
col += 1;
if (htmlMaskMatch(mask, cur)) {
if (comment) {
if (avail < 2) {
termSkip = 1;
} else if (in[1] == '-') {
if (avail < 3) {
termSkip = 2;
} else if (in[2] == '>') {
termSkip = 3;
} else if (in[2] == '!') {
if (avail < 4)
termSkip = 3;
else if (in[3] == '>')
termSkip = 4;
}
}
if (termSkip >= 0)
break;
} else {
termSkip = 0;
break;
}
}
if (ncr) {
int lc = cur | 0x20;
int digit;
if ((cur >= '0') && (cur <= '9')) {
digit = cur - '0';
} else if ((ncr == 16) && (lc >= 'a') && (lc <= 'f')) {
digit = (lc - 'a') + 10;
} else {
if (cur == ';') {
in += 1;
size += 1;
ncrSize += 1;
}
goto next_chunk;
}
cp = cp * ncr + digit;
if (cp >= 0x110000)
cp = 0x110000;
ncrSize += 1;
goto next_char;
}
switch (cur) {
case '&':
if (!refs)
break;
j = 1;
if ((j < avail) && (in[j] == '#')) {
j += 1;
if (j < avail) {
if ((in[j] | 0x20) == 'x') {
j += 1;
if ((j < avail) && (IS_HEX_DIGIT(in[j]))) {
ncr = 16;
size = 3;
ncrSize = 3;
cp = 0;
}
} else if (IS_ASCII_DIGIT(in[j])) {
ncr = 10;
size = 2;
ncrSize = 2;
cp = 0;
}
}
} else {
repl = htmlFindEntityPrefix(in + j,
avail - j,
/* isAttr */ 1,
&skip, &replSize);
if (repl != NULL) {
skip += 1;
goto next_chunk;
}
skip = 0;
}
break;
case '\0':
skip = 1;
repl = BAD_CAST "\xEF\xBF\xBD";
replSize = 3;
goto next_chunk;
case '\n':
line += 1;
col = 1;
break;
case '\r':
skip = 1;
if (in[1] != 0x0A) {
repl = BAD_CAST "\x0A";
replSize = 1;
}
goto next_chunk;
default:
if (cur < 0x80)
break;
if ((input->flags & XML_INPUT_HAS_ENCODING) == 0) {
xmlChar * guess;
#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
guess = NULL;
#else
guess = htmlFindEncoding(ctxt);
#endif
if (guess == NULL) {
xmlSwitchEncoding(ctxt, XML_CHAR_ENCODING_8859_1);
} else {
xmlSwitchEncodingName(ctxt, (const char *) guess);
xmlFree(guess);
}
input->flags |= XML_INPUT_HAS_ENCODING;
goto restart;
}
size = htmlValidateUtf8(ctxt, in, avail, /* partial */ 0);
if (size <= 0) {
skip = 1;
repl = BAD_CAST "\xEF\xBF\xBD";
replSize = 3;
goto next_chunk;
}
break;
}
next_char:
in += size;
avail -= size;
}
next_chunk:
if (ncrSize > 0) {
skip = ncrSize;
in -= ncrSize;
repl = htmlCodePointToUtf8(cp, utf8Char, &replSize);
}
chunkSize = in - chunk;
extraSize = chunkSize + replSize;
if (extraSize > maxLength - used) {
htmlParseErr(ctxt, XML_ERR_RESOURCE_LIMIT,
"value too long\n", NULL, NULL);
goto error;
}
if (extraSize > buffer_size - used) {
size_t newSize = (used + extraSize) * 2;
xmlChar *tmp = xmlRealloc(buffer, newSize + 1);
if (tmp == NULL) {
htmlErrMemory(ctxt);
goto error;
}
buffer = tmp;
buffer_size = newSize;
}
if (chunkSize > 0) {
input->cur += chunkSize;
memcpy(buffer + used, chunk, chunkSize);
used += chunkSize;
}
input->cur += skip;
if (replSize > 0) {
memcpy(buffer + used, repl, replSize);
used += replSize;
}
SHRINK;
if (termSkip >= 0)
break;
restart:
;
}
if (termSkip > 0) {
input->cur += termSkip;
col += termSkip;
}
input->line = line;
input->col = col;
ret = xmlMalloc(used + 1);
if (ret == NULL) {
htmlErrMemory(ctxt);
} else {
memcpy(ret, buffer, used);
ret[used] = 0;
}
error:
ctxt->spaceTab = (void *) buffer;
ctxt->spaceMax = buffer_size;
return(ret);
}
/**
* htmlParseEntityRef:
* @ctxt: an HTML parser context
* @str: location to store the entity name
*
* DEPRECATED: Internal function, don't use.
*
* Returns NULL.
*/
const htmlEntityDesc *
htmlParseEntityRef(htmlParserCtxtPtr ctxt ATTRIBUTE_UNUSED,
const xmlChar **str ATTRIBUTE_UNUSED) {
return(NULL);
}
/**
* 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.
*/
static xmlChar *
htmlParseAttValue(htmlParserCtxtPtr ctxt) {
xmlChar *ret = NULL;
int maxLength = (ctxt->options & HTML_PARSE_HUGE) ?
XML_MAX_HUGE_LENGTH :
XML_MAX_TEXT_LENGTH;
if (CUR == '"') {
SKIP(1);
ret = htmlParseData(ctxt, MASK_DQ, 0, 1, maxLength);
if (CUR == '"')
SKIP(1);
} else if (CUR == '\'') {
SKIP(1);
ret = htmlParseData(ctxt, MASK_SQ, 0, 1, maxLength);
if (CUR == '\'')
SKIP(1);
} else {
ret = htmlParseData(ctxt, MASK_WS_GT, 0, 1, maxLength);
}
return(ret);
}
static void
htmlCharDataSAXCallback(htmlParserCtxtPtr ctxt, const xmlChar *buf,
int size, int mode) {
if ((ctxt->sax == NULL) || (ctxt->disableSAX))
return;
if ((mode == 0) || (mode == DATA_RCDATA) ||
(ctxt->sax->cdataBlock == NULL)) {
if ((ctxt->name == NULL) ||
(xmlStrEqual(ctxt->name, BAD_CAST "html")) ||
(xmlStrEqual(ctxt->name, BAD_CAST "head"))) {
int i;
/*
* Add leading whitespace to html or head elements before
* calling htmlCheckParagraph.
*/
for (i = 0; i < size; i++)
if (!IS_WS_HTML(buf[i]))
break;
if (i > 0) {
if (!ctxt->keepBlanks) {
if (ctxt->sax->ignorableWhitespace != NULL)
ctxt->sax->ignorableWhitespace(ctxt->userData, buf, i);
} else {
if (ctxt->sax->characters != NULL)
ctxt->sax->characters(ctxt->userData, buf, i);
}
buf += i;
size -= i;
}
if (size <= 0)
return;
htmlCheckParagraph(ctxt);
}
if ((mode == 0) &&
(!ctxt->keepBlanks) &&
(areBlanks(ctxt, buf, size))) {
if (ctxt->sax->ignorableWhitespace != NULL)
ctxt->sax->ignorableWhitespace(ctxt->userData, buf, size);
} else {
if (ctxt->sax->characters != NULL)
ctxt->sax->characters(ctxt->userData, buf, size);
}
} else {
/*
* Insert as CDATA, which is the same as HTML_PRESERVE_NODE
*/
ctxt->sax->cdataBlock(ctxt->userData, buf, size);
}
}
/**
* htmlParseCharData:
* @ctxt: an HTML parser context
* @partial: true if the input buffer is incomplete
*
* Parse character data and references.
*
* Returns 1 if all data was parsed, 0 otherwise.
*/
static int
htmlParseCharData(htmlParserCtxtPtr ctxt, int partial) {
xmlParserInputPtr input = ctxt->input;
xmlChar utf8Char[4];
int complete = 0;
int done = 0;
int mode;
int eof = PARSER_PROGRESSIVE(ctxt);
int line, col;
mode = ctxt->endCheckState;
line = input->line;
col = input->col;
while (!PARSER_STOPPED(ctxt)) {
const xmlChar *chunk, *in, *repl;
size_t avail;
int replSize;
int skip = 0;
int ncr = 0;
int ncrSize = 0;
int cp = 0;
chunk = input->cur;
avail = input->end - chunk;
in = chunk;
repl = BAD_CAST "";
replSize = 0;
while (!PARSER_STOPPED(ctxt)) {
size_t j;
int cur, size;
if (avail <= 64) {
if (!eof) {
size_t oldAvail = avail;
size_t off = in - chunk;
input->cur = in;
xmlParserGrow(ctxt);
in = input->cur;
chunk = in - off;
input->cur = chunk;
avail = input->end - in;
if (oldAvail == avail)
eof = 1;
}
if (avail == 0) {
if ((partial) && (ncr)) {
in -= ncrSize;
ncrSize = 0;
}
done = 1;
break;
}
}
/* Accelerator */
if (!ncr) {
while (avail > 0) {
static const unsigned mask[8] = {
0x00002401, 0x10002040,
0x00000000, 0x00000000,
0xFFFFFFFF, 0xFFFFFFFF,
0xFFFFFFFF, 0xFFFFFFFF
};
cur = *in;
if ((1u << (cur & 0x1F)) & mask[cur >> 5])
break;
col += 1;
in += 1;
avail -= 1;
}
if ((!eof) && (avail <= 64))
continue;
if (avail == 0)
continue;
}
cur = *in;
size = 1;
col += 1;
if (ncr) {
int lc = cur | 0x20;
int digit;
if ((cur >= '0') && (cur <= '9')) {
digit = cur - '0';
} else if ((ncr == 16) && (lc >= 'a') && (lc <= 'f')) {
digit = (lc - 'a') + 10;
} else {
if (cur == ';') {
in += 1;
size += 1;
ncrSize += 1;
}
goto next_chunk;
}
cp = cp * ncr + digit;
if (cp >= 0x110000)
cp = 0x110000;
ncrSize += 1;
goto next_char;
}
switch (cur) {
case '<':
if (mode == 0) {
done = 1;
complete = 1;
goto next_chunk;
}
if (mode == DATA_PLAINTEXT)
break;
j = 1;
if (j < avail) {
if ((mode == DATA_SCRIPT) && (in[j] == '!')) {
/* Check for comment start */
j += 1;
if ((j < avail) && (in[j] == '-')) {
j += 1;
if ((j < avail) && (in[j] == '-'))
mode = DATA_SCRIPT_ESC1;
}
} else {
int i = 0;
int solidus = 0;
/* Check for tag */
if (in[j] == '/') {
j += 1;
solidus = 1;
}
if ((solidus) || (mode == DATA_SCRIPT_ESC1)) {
while ((j < avail) &&
(ctxt->name[i] != 0) &&
(ctxt->name[i] == (in[j] | 0x20))) {
i += 1;
j += 1;
}
if ((ctxt->name[i] == 0) && (j < avail)) {
int c = in[j];
if ((c == '>') || (c == '/') ||
(IS_WS_HTML(c))) {
if ((mode == DATA_SCRIPT_ESC1) &&
(!solidus)) {
mode = DATA_SCRIPT_ESC2;
} else if (mode == DATA_SCRIPT_ESC2) {
mode = DATA_SCRIPT_ESC1;
} else {
complete = 1;
done = 1;
goto next_chunk;
}
}
}
}
}
}
if ((partial) && (j >= avail)) {
done = 1;
goto next_chunk;
}
break;
case '-':
if ((mode != DATA_SCRIPT_ESC1) && (mode != DATA_SCRIPT_ESC2))
break;
/* Check for comment end */
j = 1;
if ((j < avail) && (in[j] == '-')) {
j += 1;
if ((j < avail) && (in[j] == '>'))
mode = DATA_SCRIPT;
}
if ((partial) && (j >= avail)) {
done = 1;
goto next_chunk;
}
break;
case '&':
if ((mode != 0) && (mode != DATA_RCDATA))
break;
j = 1;
if ((j < avail) && (in[j] == '#')) {
j += 1;
if (j < avail) {
if ((in[j] | 0x20) == 'x') {
j += 1;
if ((j < avail) && (IS_HEX_DIGIT(in[j]))) {
ncr = 16;
size = 3;
ncrSize = 3;
cp = 0;
}
} else if (IS_ASCII_DIGIT(in[j])) {
ncr = 10;
size = 2;
ncrSize = 2;
cp = 0;
}
}
} else {
if (partial) {
int terminated = 0;
size_t i;
/*
* ∳ has 33 bytes.
*/
for (i = 1; i < avail; i++) {
if ((i >= 32) || !IS_ASCII_LETTER(in[i])) {
terminated = 1;
break;
}
}
if (!terminated) {
done = 1;
goto next_chunk;
}
}
repl = htmlFindEntityPrefix(in + j,
avail - j,
/* isAttr */ 0,
&skip, &replSize);
if (repl != NULL) {
skip += 1;
goto next_chunk;
}
skip = 0;
}
if ((partial) && (j >= avail)) {
done = 1;
goto next_chunk;
}
break;
case '\0':
skip = 1;
repl = BAD_CAST "\xEF\xBF\xBD";
replSize = 3;
goto next_chunk;
case '\n':
line += 1;
col = 1;
break;
case '\r':
if (partial && avail < 2) {
done = 1;
goto next_chunk;
}
skip = 1;
if (in[1] != 0x0A) {
repl = BAD_CAST "\x0A";
replSize = 1;
}
goto next_chunk;
default:
if (cur < 0x80)
break;
if ((input->flags & XML_INPUT_HAS_ENCODING) == 0) {
xmlChar * guess;
if (in > chunk)
goto next_chunk;
#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
guess = NULL;
#else
guess = htmlFindEncoding(ctxt);
#endif
if (guess == NULL) {
xmlSwitchEncoding(ctxt, XML_CHAR_ENCODING_8859_1);
} else {
xmlSwitchEncodingName(ctxt, (const char *) guess);
xmlFree(guess);
}
input->flags |= XML_INPUT_HAS_ENCODING;
goto restart;
}
size = htmlValidateUtf8(ctxt, in, avail, partial);
if ((partial) && (size == 0)) {
done = 1;
goto next_chunk;
}
if (size <= 0) {
skip = 1;
repl = BAD_CAST "\xEF\xBF\xBD";
replSize = 3;
goto next_chunk;
}
break;
}
next_char:
in += size;
avail -= size;
}
next_chunk:
if (ncrSize > 0) {
skip = ncrSize;
in -= ncrSize;
repl = htmlCodePointToUtf8(cp, utf8Char, &replSize);
}
if (in > chunk) {
input->cur += in - chunk;
htmlCharDataSAXCallback(ctxt, chunk, in - chunk, mode);
}
input->cur += skip;
if (replSize > 0)
htmlCharDataSAXCallback(ctxt, repl, replSize, mode);
SHRINK;
if (done)
break;
restart:
;
}
input->line = line;
input->col = col;
if (complete)
ctxt->endCheckState = 0;
else
ctxt->endCheckState = mode;
return(complete);
}
/**
* htmlParseComment:
* @ctxt: an HTML parser context
* @bogus: true if this is a bogus comment
*
* Parse an HTML comment
*/
static void
htmlParseComment(htmlParserCtxtPtr ctxt, int bogus) {
const xmlChar *comment = BAD_CAST "";
xmlChar *buf = NULL;
int maxLength = (ctxt->options & HTML_PARSE_HUGE) ?
XML_MAX_HUGE_LENGTH :
XML_MAX_TEXT_LENGTH;
if (bogus) {
buf = htmlParseData(ctxt, MASK_GT, 0, 0, maxLength);
if (CUR == '>')
SKIP(1);
comment = buf;
} else {
if (CUR == '>') {
SKIP(1);
} else if ((CUR == '-') && (NXT(1) == '>')) {
SKIP(2);
} else {
buf = htmlParseData(ctxt, MASK_DASH, 1, 0, maxLength);
comment = buf;
}
}
if (comment == NULL)
return;
if ((ctxt->sax != NULL) && (ctxt->sax->comment != NULL) &&
(!ctxt->disableSAX))
ctxt->sax->comment(ctxt->userData, comment);
xmlFree(buf);
}
/**
* htmlParseCharRef:
* @ctxt: an HTML parser context
*
* DEPRECATED: Internal function, don't use.
*
* Returns 0
*/
int
htmlParseCharRef(htmlParserCtxtPtr ctxt ATTRIBUTE_UNUSED) {
return(0);
}
/**
* htmlParseDoctypeLiteral:
* @ctxt: an HTML parser context
*
* Parse a DOCTYPE SYTSTEM or PUBLIC literal.
*
* Returns the literal or NULL in case of error.
*/
static xmlChar *
htmlParseDoctypeLiteral(htmlParserCtxtPtr ctxt) {
xmlChar *ret;
int maxLength = (ctxt->options & HTML_PARSE_HUGE) ?
XML_MAX_TEXT_LENGTH :
XML_MAX_NAME_LENGTH;
if (CUR == '"') {
SKIP(1);
ret = htmlParseData(ctxt, MASK_DQ_GT, 0, 0, maxLength);
if (CUR == '"')
SKIP(1);
} else if (CUR == '\'') {
SKIP(1);
ret = htmlParseData(ctxt, MASK_SQ_GT, 0, 0, maxLength);
if (CUR == '\'')
SKIP(1);
} else {
return(NULL);
}
return(ret);
}
static void
htmlSkipBogusDoctype(htmlParserCtxtPtr ctxt) {
const xmlChar *in;
size_t avail;
int eof = PARSER_PROGRESSIVE(ctxt);
int line, col;
line = ctxt->input->line;
col = ctxt->input->col;
in = ctxt->input->cur;
avail = ctxt->input->end - in;
while (!PARSER_STOPPED(ctxt)) {
int cur;
if ((!eof) && (avail <= 64)) {
size_t oldAvail = avail;
ctxt->input->cur = in;
xmlParserGrow(ctxt);
in = ctxt->input->cur;
avail = ctxt->input->end - in;
if (oldAvail == avail)
eof = 1;
}
if (avail == 0)
break;
col += 1;
cur = *in;
if (cur == '>') {
in += 1;
break;
} else if (cur == 0x0A) {
line += 1;
col = 1;
}
in += 1;
avail -= 1;
SHRINK;
}
ctxt->input->cur = in;
ctxt->input->line = line;
ctxt->input->col = col;
}
/**
* htmlParseDocTypeDecl:
* @ctxt: an HTML parser context
*
* Parse a DOCTYPE declaration.
*/
static void
htmlParseDocTypeDecl(htmlParserCtxtPtr ctxt) {
xmlChar *name = NULL;
xmlChar *publicId = NULL;
xmlChar *URI = NULL;
int maxLength = (ctxt->options & HTML_PARSE_HUGE) ?
XML_MAX_TEXT_LENGTH :
XML_MAX_NAME_LENGTH;
/*
* We know that '<!DOCTYPE' has been detected.
*/
SKIP(9);
SKIP_BLANKS;
if ((ctxt->input->cur < ctxt->input->end) && (CUR != '>')) {
name = htmlParseData(ctxt, MASK_WS_GT, 0, 0, maxLength);
if ((ctxt->options & HTML_PARSE_HTML5) && (name != NULL)) {
xmlChar *cur;
for (cur = name; *cur; cur++) {
if (IS_UPPER(*cur))
*cur += 0x20;
}
}
SKIP_BLANKS;
}
/*
* Check for SystemID and publicId
*/
if ((UPPER == 'P') && (UPP(1) == 'U') &&
(UPP(2) == 'B') && (UPP(3) == 'L') &&
(UPP(4) == 'I') && (UPP(5) == 'C')) {
SKIP(6);
SKIP_BLANKS;
publicId = htmlParseDoctypeLiteral(ctxt);
if (publicId == NULL)
goto bogus;
SKIP_BLANKS;
URI = htmlParseDoctypeLiteral(ctxt);
} else if ((UPPER == 'S') && (UPP(1) == 'Y') &&
(UPP(2) == 'S') && (UPP(3) == 'T') &&
(UPP(4) == 'E') && (UPP(5) == 'M')) {
SKIP(6);
SKIP_BLANKS;
URI = htmlParseDoctypeLiteral(ctxt);
}
bogus:
htmlSkipBogusDoctype(ctxt);
/*
* Create or update the document accordingly to the DOCTYPE
*/
if ((ctxt->sax != NULL) && (ctxt->sax->internalSubset != NULL) &&
(!ctxt->disableSAX))
ctxt->sax->internalSubset(ctxt->userData, name, publicId, URI);
xmlFree(name);
xmlFree(URI);
xmlFree(publicId);
}
/**
* htmlParseAttribute:
* @ctxt: an HTML parser context
* @value: a xmlChar ** used to store the value of the attribute
*
* parse an attribute
*
* [41] Attribute ::= Name Eq AttValue
*
* [25] Eq ::= S? '=' S?
*
* With namespace:
*
* [NS 11] Attribute ::= QName Eq AttValue
*
* Also the case QName == xmlns:??? is handled independently as a namespace
* definition.
*
* Returns the attribute name, and the value in *value.
*/
static xmlHashedString
htmlParseAttribute(htmlParserCtxtPtr ctxt, xmlChar **value) {
xmlHashedString hname;
xmlChar *val = NULL;
*value = NULL;
hname = htmlParseHTMLName(ctxt, 1);
if (hname.name == NULL)
return(hname);
/*
* read the value
*/
SKIP_BLANKS;
if (CUR == '=') {
SKIP(1);
SKIP_BLANKS;
val = htmlParseAttValue(ctxt);
}
*value = val;
return(hname);
}
/**
* htmlCheckEncoding:
* @ctxt: an HTML parser context
* @attvalue: the attribute value
*
* Checks an http-equiv attribute from a Meta tag to detect
* the encoding
* If a new encoding is detected the parser is switched to decode
* it and pass UTF8
*/
static void
htmlCheckEncoding(htmlParserCtxtPtr ctxt, const xmlChar *attvalue) {
const xmlChar *encoding;
xmlChar *copy;
if (!attvalue)
return;
encoding = xmlStrcasestr(attvalue, BAD_CAST"charset");
if (encoding != NULL) {
encoding += 7;
}
/*
* skip blank
*/
if (encoding && IS_WS_HTML(*encoding))
encoding = xmlStrcasestr(attvalue, BAD_CAST"=");
if (encoding && *encoding == '=') {
encoding ++;
copy = xmlStrdup(encoding);
if (copy == NULL)
htmlErrMemory(ctxt);
xmlSetDeclaredEncoding(ctxt, copy);
}
}
/**
* htmlCheckMeta:
* @ctxt: an HTML parser context
* @atts: the attributes values
*
* Checks an attributes from a Meta tag
*/
static void
htmlCheckMeta(htmlParserCtxtPtr ctxt, const xmlChar **atts) {
int i;
const xmlChar *att, *value;
int http = 0;
const xmlChar *content = NULL;
if ((ctxt == NULL) || (atts == NULL))
return;
i = 0;
att = atts[i++];
while (att != NULL) {
value = atts[i++];
if (value != NULL) {
if ((!xmlStrcasecmp(att, BAD_CAST "http-equiv")) &&
(!xmlStrcasecmp(value, BAD_CAST "Content-Type"))) {
http = 1;
} else if (!xmlStrcasecmp(att, BAD_CAST "charset")) {
xmlChar *copy;
copy = xmlStrdup(value);
if (copy == NULL)
htmlErrMemory(ctxt);
xmlSetDeclaredEncoding(ctxt, copy);
} else if (!xmlStrcasecmp(att, BAD_CAST "content")) {
content = value;
}
}
att = atts[i++];
}
if ((http) && (content != NULL))
htmlCheckEncoding(ctxt, content);
}
/**
* htmlAttrHashInsert:
* @ctxt: parser context
* @size: size of the hash table
* @name: attribute name
* @hashValue: hash value of name
* @aindex: attribute index (this is a multiple of 5)
*
* Inserts a new attribute into the hash table.
*
* Returns INT_MAX if no existing attribute was found, the attribute
* index if an attribute was found, -1 if a memory allocation failed.
*/
static int
htmlAttrHashInsert(xmlParserCtxtPtr ctxt, unsigned size, const xmlChar *name,
unsigned hashValue, int aindex) {
xmlAttrHashBucket *table = ctxt->attrHash;
xmlAttrHashBucket *bucket;
unsigned hindex;
hindex = hashValue & (size - 1);
bucket = &table[hindex];
while (bucket->index >= 0) {
const xmlChar **atts = &ctxt->atts[bucket->index];
if (name == atts[0])
return(bucket->index);
hindex++;
bucket++;
if (hindex >= size) {
hindex = 0;
bucket = table;
}
}
bucket->index = aindex;
return(INT_MAX);
}
/**
* 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 0 in case of success, -1 in case of error and 1 if discarded
*/
static void
htmlParseStartTag(htmlParserCtxtPtr ctxt) {
const xmlChar *name;
const xmlChar *attname;
xmlChar *attvalue;
const xmlChar **atts;
int nbatts = 0;
int maxatts;
int meta = 0;
int i;
int discardtag = 0;
ctxt->endCheckState = 0;
SKIP(1);
atts = ctxt->atts;
maxatts = ctxt->maxatts;
GROW;
name = htmlParseHTMLName(ctxt, 0).name;
if (name == NULL)
return;
if (xmlStrEqual(name, BAD_CAST"meta"))
meta = 1;
if ((ctxt->options & HTML_PARSE_HTML5) == 0) {
/*
* Check for auto-closure of HTML elements.
*/
htmlAutoClose(ctxt, name);
/*
* Check for implied HTML elements.
*/
htmlCheckImplied(ctxt, name);
/*
* Avoid html at any level > 0, head at any level != 1
* or any attempt to recurse body
*/
if ((ctxt->nameNr > 0) && (xmlStrEqual(name, BAD_CAST"html"))) {
htmlParseErr(ctxt, XML_HTML_STRUCURE_ERROR,
"htmlParseStartTag: misplaced <html> tag\n",
name, NULL);
discardtag = 1;
ctxt->depth++;
}
if ((ctxt->nameNr != 1) &&
(xmlStrEqual(name, BAD_CAST"head"))) {
htmlParseErr(ctxt, XML_HTML_STRUCURE_ERROR,
"htmlParseStartTag: misplaced <head> tag\n",
name, NULL);
discardtag = 1;
ctxt->depth++;
}
if (xmlStrEqual(name, BAD_CAST"body")) {
int indx;
for (indx = 0;indx < ctxt->nameNr;indx++) {
if (xmlStrEqual(ctxt->nameTab[indx], BAD_CAST"body")) {
htmlParseErr(ctxt, XML_HTML_STRUCURE_ERROR,
"htmlParseStartTag: misplaced <body> tag\n",
name, NULL);
discardtag = 1;
ctxt->depth++;
}
}
}
}
/*
* Now parse the attributes, it ends up with the ending
*
* (S Attribute)* S?
*/
SKIP_BLANKS;
while ((ctxt->input->cur < ctxt->input->end) &&
(CUR != '>') &&
((CUR != '/') || (NXT(1) != '>')) &&
(PARSER_STOPPED(ctxt) == 0)) {
xmlHashedString hattname;
/* unexpected-solidus-in-tag */
if (CUR == '/') {
SKIP(1);
SKIP_BLANKS;
continue;
}
GROW;
hattname = htmlParseAttribute(ctxt, &attvalue);
attname = hattname.name;
if (attname != NULL) {
/*
* Add the pair to atts
*/
if (nbatts + 4 > maxatts) {
const xmlChar **tmp;
unsigned *utmp;
int newSize;
newSize = xmlGrowCapacity(maxatts,
sizeof(tmp[0]) * 2 + sizeof(utmp[0]),
11, HTML_MAX_ATTRS);
if (newSize < 0) {
htmlErrMemory(ctxt);
goto failed;
}
#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION
if (newSize < 2)
newSize = 2;
#endif
tmp = xmlRealloc(atts, newSize * sizeof(tmp[0]) * 2);
if (tmp == NULL) {
htmlErrMemory(ctxt);
goto failed;
}
atts = tmp;
ctxt->atts = tmp;
utmp = xmlRealloc(ctxt->attallocs, newSize * sizeof(utmp[0]));
if (utmp == NULL) {
htmlErrMemory(ctxt);
goto failed;
}
ctxt->attallocs = utmp;
maxatts = newSize * 2;
ctxt->maxatts = maxatts;
}
ctxt->attallocs[nbatts/2] = hattname.hashValue;
atts[nbatts++] = attname;
atts[nbatts++] = attvalue;
attvalue = NULL;
}
failed:
if (attvalue != NULL)
xmlFree(attvalue);
SKIP_BLANKS;
}
if (ctxt->input->cur >= ctxt->input->end) {
discardtag = 1;
goto done;
}
/*
* Verify that attribute names are unique.
*/
if (nbatts > 2) {
unsigned attrHashSize;
int j, k;
attrHashSize = 4;
while (attrHashSize / 2 < (unsigned) nbatts / 2)
attrHashSize *= 2;
if (attrHashSize > ctxt->attrHashMax) {
xmlAttrHashBucket *tmp;
tmp = xmlRealloc(ctxt->attrHash, attrHashSize * sizeof(tmp[0]));
if (tmp == NULL) {
htmlErrMemory(ctxt);
goto done;
}
ctxt->attrHash = tmp;
ctxt->attrHashMax = attrHashSize;
}
memset(ctxt->attrHash, -1, attrHashSize * sizeof(ctxt->attrHash[0]));
for (i = 0, j = 0, k = 0; i < nbatts; i += 2, k++) {
unsigned hashValue;
int res;
attname = atts[i];
hashValue = ctxt->attallocs[k] | 0x80000000;
res = htmlAttrHashInsert(ctxt, attrHashSize, attname,
hashValue, j);
if (res < 0)
continue;
if (res == INT_MAX) {
atts[j] = atts[i];
atts[j+1] = atts[i+1];
j += 2;
} else {
xmlFree((xmlChar *) atts[i+1]);
}
}
nbatts = j;
}
if (nbatts > 0) {
atts[nbatts] = NULL;
atts[nbatts + 1] = NULL;
/*
* Apple's new libiconv is so broken that you routinely run into
* issues when fuzz testing (by accident with an uninstrumented
* libiconv). Here's a harmless (?) example:
*
* printf '>' | iconv -f shift_jis -t utf-8 | hexdump -C
* printf '\xfc\x00\x00' | iconv -f shift_jis -t utf-8 | hexdump -C
* printf '>\xfc\x00\x00' | iconv -f shift_jis -t utf-8 | hexdump -C
*
* The last command fails to detect the illegal sequence.
*/
#if !defined(__APPLE__) || \
!defined(FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION)
/*
* Handle specific association to the META tag
*/
if (meta)
htmlCheckMeta(ctxt, atts);
#endif
}
/*
* SAX: Start of Element !
*/
if (!discardtag) {
if (ctxt->options & HTML_PARSE_HTML5) {
if (ctxt->nameNr > 0)
htmlnamePop(ctxt);
}
htmlnamePush(ctxt, name);
if ((ctxt->sax != NULL) && (ctxt->sax->startElement != NULL)) {
if (nbatts != 0)
ctxt->sax->startElement(ctxt->userData, name, atts);
else
ctxt->sax->startElement(ctxt->userData, name, NULL);
}
}
done:
if (atts != NULL) {
for (i = 1;i < nbatts;i += 2) {
if (atts[i] != NULL)
xmlFree((xmlChar *) atts[i]);
}
}
}
/**
* htmlParseEndTag:
* @ctxt: an HTML parser context
*
* parse an end of tag
*
* [42] ETag ::= '</' Name S? '>'
*
* With namespace
*
* [NS 9] ETag ::= '</' QName S? '>'
*
* Returns 1 if the current level should be closed.
*/
static void
htmlParseEndTag(htmlParserCtxtPtr ctxt)
{
const xmlChar *name;
const xmlChar *oldname;
int i;
ctxt->endCheckState = 0;
SKIP(2);
if (ctxt->input->cur >= ctxt->input->end) {
htmlCheckParagraph(ctxt);
if ((ctxt->sax != NULL) && (!ctxt->disableSAX) &&
(ctxt->sax->characters != NULL))
ctxt->sax->characters(ctxt->userData,
BAD_CAST "</", 2);
return;
}
if (CUR == '>') {
SKIP(1);
return;
}
if (!IS_ASCII_LETTER(CUR)) {
htmlParseComment(ctxt, /* bogus */ 1);
return;
}
name = htmlParseHTMLName(ctxt, 0).name;
if (name == NULL)
return;
/*
* Parse and ignore attributes.
*/
SKIP_BLANKS;
while ((ctxt->input->cur < ctxt->input->end) &&
(CUR != '>') &&
((CUR != '/') || (NXT(1) != '>')) &&
(ctxt->instate != XML_PARSER_EOF)) {
xmlChar *attvalue = NULL;
/* unexpected-solidus-in-tag */
if (CUR == '/') {
SKIP(1);
SKIP_BLANKS;
continue;
}
GROW;
htmlParseAttribute(ctxt, &attvalue);
if (attvalue != NULL)
xmlFree(attvalue);
SKIP_BLANKS;
}
if (CUR == '>') {
SKIP(1);
} else if ((CUR == '/') && (NXT(1) == '>')) {
SKIP(2);
} else {
return;
}
if (ctxt->options & HTML_PARSE_HTML5) {
if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL))
ctxt->sax->endElement(ctxt->userData, name);
return;
}
/*
* if we ignored misplaced tags in htmlParseStartTag don't pop them
* out now.
*/
if ((ctxt->depth > 0) &&
(xmlStrEqual(name, BAD_CAST "html") ||
xmlStrEqual(name, BAD_CAST "body") ||
xmlStrEqual(name, BAD_CAST "head"))) {
ctxt->depth--;
return;
}
/*
* If the name read is not one of the element in the parsing stack
* then return, it's just an error.
*/
for (i = (ctxt->nameNr - 1); i >= 0; i--) {
if (xmlStrEqual(name, ctxt->nameTab[i]))
break;
}
if (i < 0) {
htmlParseErr(ctxt, XML_ERR_TAG_NAME_MISMATCH,
"Unexpected end tag : %s\n", name, NULL);
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 ((ctxt->name != NULL) && (!xmlStrEqual(ctxt->name, name))) {
htmlParseErr(ctxt, XML_ERR_TAG_NAME_MISMATCH,
"Opening and ending tag mismatch: %s and %s\n",
name, ctxt->name);
}
/*
* SAX: End of Tag
*/
oldname = ctxt->name;
if ((oldname != NULL) && (xmlStrEqual(oldname, name))) {
htmlParserFinishElementParsing(ctxt);
if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL))
ctxt->sax->endElement(ctxt->userData, name);
htmlnamePop(ctxt);
}
}
/**
* htmlParseContent:
* @ctxt: an HTML parser context
*
* Parse a content: comment, sub-element, reference or text.
* New version for non recursive htmlParseElementInternal
*/
static void
htmlParseContent(htmlParserCtxtPtr ctxt) {
GROW;
while ((PARSER_STOPPED(ctxt) == 0) &&
(ctxt->input->cur < ctxt->input->end)) {
int mode;
mode = ctxt->endCheckState;
if ((mode == 0) && (CUR == '<')) {
if (NXT(1) == '/') {
htmlParseEndTag(ctxt);
} else if (NXT(1) == '!') {
/*
* Sometimes DOCTYPE arrives in the middle of the document
*/
if ((UPP(2) == 'D') && (UPP(3) == 'O') &&
(UPP(4) == 'C') && (UPP(5) == 'T') &&
(UPP(6) == 'Y') && (UPP(7) == 'P') &&
(UPP(8) == 'E')) {
htmlParseDocTypeDecl(ctxt);
} else if ((NXT(2) == '-') && (NXT(3) == '-')) {
SKIP(4);
htmlParseComment(ctxt, /* bogus */ 0);
} else {
SKIP(2);
htmlParseComment(ctxt, /* bogus */ 1);
}
} else if (NXT(1) == '?') {
SKIP(1);
htmlParseComment(ctxt, /* bogus */ 1);
} else if (IS_ASCII_LETTER(NXT(1))) {
htmlParseElementInternal(ctxt);
} else {
htmlCheckParagraph(ctxt);
if ((ctxt->sax != NULL) && (!ctxt->disableSAX) &&
(ctxt->sax->characters != NULL))
ctxt->sax->characters(ctxt->userData, BAD_CAST "<", 1);
SKIP(1);
}
} else {
htmlParseCharData(ctxt, /* partial */ 0);
}
SHRINK;
GROW;
}
if (ctxt->input->cur >= ctxt->input->end)
htmlAutoCloseOnEnd(ctxt);
}
/**
* htmlParseElementInternal:
* @ctxt: an HTML parser context
*
* parse an HTML element, new version, non recursive
*
* [39] element ::= EmptyElemTag | STag content ETag
*
* [41] Attribute ::= Name Eq AttValue
*/
static int
htmlParseElementInternal(htmlParserCtxtPtr ctxt) {
const xmlChar *name;
const htmlElemDesc * info;
htmlParserNodeInfo node_info = { NULL, 0, 0, 0, 0 };
if ((ctxt == NULL) || (ctxt->input == NULL))
return(0);
/* Capture start position */
if (ctxt->record_info) {
node_info.begin_pos = ctxt->input->consumed +
(CUR_PTR - ctxt->input->base);
node_info.begin_line = ctxt->input->line;
}
htmlParseStartTag(ctxt);
name = ctxt->name;
if (name == NULL)
return(0);
if (ctxt->record_info)
htmlNodeInfoPush(ctxt, &node_info);
/*
* Check for an Empty Element labeled the XML/SGML way
*/
if ((CUR == '/') && (NXT(1) == '>')) {
SKIP(2);
htmlParserFinishElementParsing(ctxt);
if ((ctxt->options & HTML_PARSE_HTML5) == 0) {
if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL))
ctxt->sax->endElement(ctxt->userData, name);
}
htmlnamePop(ctxt);
return(0);
}
if (CUR != '>')
return(0);
SKIP(1);
/*
* Lookup the info for that element.
*/
info = htmlTagLookup(name);
/*
* Check for an Empty Element from DTD definition
*/
if ((info != NULL) && (info->empty)) {
htmlParserFinishElementParsing(ctxt);
if ((ctxt->options & HTML_PARSE_HTML5) == 0) {
if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL))
ctxt->sax->endElement(ctxt->userData, name);
}
htmlnamePop(ctxt);
return(0);
}
if (info != NULL)
ctxt->endCheckState = info->dataMode;
return(1);
}
/**
* htmlParseElement:
* @ctxt: an HTML parser context
*
* DEPRECATED: Internal function, don't use.
*
* parse an HTML element, this is highly recursive
* this is kept for compatibility with previous code versions
*
* [39] element ::= EmptyElemTag | STag content ETag
*
* [41] Attribute ::= Name Eq AttValue
*/
void
htmlParseElement(htmlParserCtxtPtr ctxt) {
const xmlChar *oldptr;
int depth;
if ((ctxt == NULL) || (ctxt->input == NULL))
return;
if (htmlParseElementInternal(ctxt) == 0)
return;
/*
* Parse the content of the element:
*/
depth = ctxt->nameNr;
while (CUR != 0) {
oldptr = ctxt->input->cur;
htmlParseContent(ctxt);
if (oldptr==ctxt->input->cur) break;
if (ctxt->nameNr < depth) break;
}
if (CUR == 0) {
htmlAutoCloseOnEnd(ctxt);
}
}
/**
* htmlCtxtParseContentInternal:
* @ctxt: parser context
* @input: parser input
*
* Returns a node list.
*/
xmlNodePtr
htmlCtxtParseContentInternal(htmlParserCtxtPtr ctxt, xmlParserInputPtr input) {
xmlNodePtr root;
xmlNodePtr list = NULL;
xmlChar *rootName = BAD_CAST "#root";
root = xmlNewDocNode(ctxt->myDoc, NULL, rootName, NULL);
if (root == NULL) {
htmlErrMemory(ctxt);
return(NULL);
}
if (xmlCtxtPushInput(ctxt, input) < 0) {
xmlFreeNode(root);
return(NULL);
}
htmlnamePush(ctxt, rootName);
nodePush(ctxt, root);
htmlParseContent(ctxt);
/* TODO: Use xmlCtxtIsCatastrophicError */
if (ctxt->errNo != XML_ERR_NO_MEMORY) {
xmlNodePtr cur;
/*
* Unlink newly created node list.
*/
list = root->children;
root->children = NULL;
root->last = NULL;
for (cur = list; cur != NULL; cur = cur->next)
cur->parent = NULL;
}
nodePop(ctxt);
htmlnamePop(ctxt);
xmlCtxtPopInput(ctxt);
xmlFreeNode(root);
return(list);
}
/**
* htmlParseDocument:
* @ctxt: an HTML parser context
*
* Parse an HTML document and invoke the SAX handlers. This is useful
* if you're only interested in custom SAX callbacks. If you want a
* document tree, use htmlCtxtParseDocument.
*
* Returns 0, -1 in case of error.
*/
int
htmlParseDocument(htmlParserCtxtPtr ctxt) {
xmlDtdPtr dtd;
if ((ctxt == NULL) || (ctxt->input == NULL))
return(-1);
if ((ctxt->sax) && (ctxt->sax->setDocumentLocator)) {
ctxt->sax->setDocumentLocator(ctxt->userData,
(xmlSAXLocator *) &xmlDefaultSAXLocator);
}
xmlDetectEncoding(ctxt);
/*
* TODO: Implement HTML5 prescan algorithm
*/
/*
* This is wrong but matches long-standing behavior. In most
* cases, a document starting with an XML declaration will
* specify UTF-8. The HTML5 prescan algorithm handles
* XML declarations in a better way.
*/
if (((ctxt->input->flags & XML_INPUT_HAS_ENCODING) == 0) &&
(xmlStrncmp(ctxt->input->cur, BAD_CAST "<?xm", 4) == 0))
xmlSwitchEncoding(ctxt, XML_CHAR_ENCODING_UTF8);
/*
* Wipe out everything which is before the first '<'
*/
SKIP_BLANKS;
if ((ctxt->sax) && (ctxt->sax->startDocument) && (!ctxt->disableSAX))
ctxt->sax->startDocument(ctxt->userData);
/*
* Parse possible comments and PIs before any content
*/
while (CUR == '<') {
if ((NXT(1) == '!') && (NXT(2) == '-') && (NXT(3) == '-')) {
SKIP(4);
htmlParseComment(ctxt, /* bogus */ 0);
} else if (NXT(1) == '?') {
SKIP(1);
htmlParseComment(ctxt, /* bogus */ 1);
} else {
break;
}
SKIP_BLANKS;
}
/*
* Then possibly doc type declaration(s) and more Misc
* (doctypedecl Misc*)?
*/
if ((CUR == '<') && (NXT(1) == '!') &&
(UPP(2) == 'D') && (UPP(3) == 'O') &&
(UPP(4) == 'C') && (UPP(5) == 'T') &&
(UPP(6) == 'Y') && (UPP(7) == 'P') &&
(UPP(8) == 'E')) {
ctxt->instate = XML_PARSER_MISC;
htmlParseDocTypeDecl(ctxt);
}
SKIP_BLANKS;
/*
* Parse possible comments and PIs before any content
*/
ctxt->instate = XML_PARSER_PROLOG;
while (CUR == '<') {
if ((NXT(1) == '!') && (NXT(2) == '-') && (NXT(3) == '-')) {
SKIP(4);
htmlParseComment(ctxt, /* bogus */ 0);
} else if (NXT(1) == '?') {
SKIP(1);
htmlParseComment(ctxt, /* bogus */ 1);
} else {
break;
}
SKIP_BLANKS;
}
/*
* Time to start parsing the tree itself
*/
ctxt->instate = XML_PARSER_CONTENT;
htmlParseContent(ctxt);
/*
* autoclose
*/
if (CUR == 0)
htmlAutoCloseOnEnd(ctxt);
/*
* SAX: end of the document processing.
*/
if ((ctxt->sax) && (ctxt->sax->endDocument != NULL))
ctxt->sax->endDocument(ctxt->userData);
if ((!(ctxt->options & HTML_PARSE_NODEFDTD)) && (ctxt->myDoc != NULL)) {
dtd = xmlGetIntSubset(ctxt->myDoc);
if (dtd == NULL) {
ctxt->myDoc->intSubset =
xmlCreateIntSubset(ctxt->myDoc, BAD_CAST "html",
BAD_CAST "-//W3C//DTD HTML 4.0 Transitional//EN",
BAD_CAST "http://www.w3.org/TR/REC-html40/loose.dtd");
if (ctxt->myDoc->intSubset == NULL)
htmlErrMemory(ctxt);
}
}
if (! ctxt->wellFormed) return(-1);
return(0);
}
/************************************************************************
* *
* Parser contexts handling *
* *
************************************************************************/
/**
* htmlInitParserCtxt:
* @ctxt: an HTML parser context
* @sax: SAX handler
* @userData: user data
*
* Initialize a parser context
*
* Returns 0 in case of success and -1 in case of error
*/
static int
htmlInitParserCtxt(htmlParserCtxtPtr ctxt, const htmlSAXHandler *sax,
void *userData)
{
if (ctxt == NULL) return(-1);
memset(ctxt, 0, sizeof(htmlParserCtxt));
ctxt->dict = xmlDictCreate();
if (ctxt->dict == NULL)
return(-1);
if (ctxt->sax == NULL)
ctxt->sax = (htmlSAXHandler *) xmlMalloc(sizeof(htmlSAXHandler));
if (ctxt->sax == NULL)
return(-1);
if (sax == NULL) {
memset(ctxt->sax, 0, sizeof(htmlSAXHandler));
xmlSAX2InitHtmlDefaultSAXHandler(ctxt->sax);
ctxt->userData = ctxt;
} else {
memcpy(ctxt->sax, sax, sizeof(htmlSAXHandler));
ctxt->userData = userData ? userData : ctxt;
}
/* Allocate the Input stack */
ctxt->inputTab = (htmlParserInputPtr *)
xmlMalloc(5 * sizeof(htmlParserInputPtr));
if (ctxt->inputTab == NULL)
return(-1);
ctxt->inputNr = 0;
ctxt->inputMax = 5;
ctxt->input = NULL;
ctxt->version = NULL;
ctxt->encoding = NULL;
ctxt->standalone = -1;
ctxt->instate = XML_PARSER_START;
/* Allocate the Node stack */
ctxt->nodeTab = (htmlNodePtr *) xmlMalloc(10 * sizeof(htmlNodePtr));
if (ctxt->nodeTab == NULL)
return(-1);
ctxt->nodeNr = 0;
ctxt->nodeMax = 10;
ctxt->node = NULL;
/* Allocate the Name stack */
ctxt->nameTab = (const xmlChar **) xmlMalloc(10 * sizeof(xmlChar *));
if (ctxt->nameTab == NULL)
return(-1);
ctxt->nameNr = 0;
ctxt->nameMax = 10;
ctxt->name = NULL;
ctxt->nodeInfoTab = NULL;
ctxt->nodeInfoNr = 0;
ctxt->nodeInfoMax = 0;
ctxt->myDoc = NULL;
ctxt->wellFormed = 1;
ctxt->replaceEntities = 0;
ctxt->linenumbers = xmlLineNumbersDefaultValue;
ctxt->keepBlanks = xmlKeepBlanksDefaultValue;
ctxt->html = 1;
ctxt->vctxt.flags = XML_VCTXT_USE_PCTXT;
ctxt->vctxt.userData = ctxt;
ctxt->vctxt.error = xmlParserValidityError;
ctxt->vctxt.warning = xmlParserValidityWarning;
ctxt->record_info = 0;
ctxt->validate = 0;
ctxt->checkIndex = 0;
ctxt->catalogs = NULL;
xmlInitNodeInfoSeq(&ctxt->node_seq);
return(0);
}
/**
* htmlFreeParserCtxt:
* @ctxt: an HTML parser context
*
* Free all the memory used by a parser context. However the parsed
* document in ctxt->myDoc is not freed.
*/
void
htmlFreeParserCtxt(htmlParserCtxtPtr ctxt)
{
xmlFreeParserCtxt(ctxt);
}
/**
* htmlNewParserCtxt:
*
* Allocate and initialize a new HTML parser context.
*
* This can be used to parse HTML documents into DOM trees with
* functions like xmlCtxtReadFile or xmlCtxtReadMemory.
*
* See htmlCtxtUseOptions for parser options.
*
* See xmlCtxtSetErrorHandler for advanced error handling.
*
* See htmlNewSAXParserCtxt for custom SAX parsers.
*
* Returns the htmlParserCtxtPtr or NULL in case of allocation error
*/
htmlParserCtxtPtr
htmlNewParserCtxt(void)
{
return(htmlNewSAXParserCtxt(NULL, NULL));
}
/**
* htmlNewSAXParserCtxt:
* @sax: SAX handler
* @userData: user data
*
* Allocate and initialize a new HTML SAX parser context. If userData
* is NULL, the parser context will be passed as user data.
*
* Available since 2.11.0. If you want support older versions,
* it's best to invoke htmlNewParserCtxt and set ctxt->sax with
* struct assignment.
*
* Also see htmlNewParserCtxt.
*
* Returns the htmlParserCtxtPtr or NULL in case of allocation error
*/
htmlParserCtxtPtr
htmlNewSAXParserCtxt(const htmlSAXHandler *sax, void *userData)
{
xmlParserCtxtPtr ctxt;
xmlInitParser();
ctxt = (xmlParserCtxtPtr) xmlMalloc(sizeof(xmlParserCtxt));
if (ctxt == NULL)
return(NULL);
memset(ctxt, 0, sizeof(xmlParserCtxt));
if (htmlInitParserCtxt(ctxt, sax, userData) < 0) {
htmlFreeParserCtxt(ctxt);
return(NULL);
}
return(ctxt);
}
static htmlParserCtxtPtr
htmlCreateMemoryParserCtxtInternal(const char *url,
const char *buffer, size_t size,
const char *encoding) {
xmlParserCtxtPtr ctxt;
xmlParserInputPtr input;
if (buffer == NULL)
return(NULL);
ctxt = htmlNewParserCtxt();
if (ctxt == NULL)
return(NULL);
input = xmlCtxtNewInputFromMemory(ctxt, url, buffer, size, encoding, 0);
if (input == NULL) {
xmlFreeParserCtxt(ctxt);
return(NULL);
}
if (xmlCtxtPushInput(ctxt, input) < 0) {
xmlFreeInputStream(input);
xmlFreeParserCtxt(ctxt);
return(NULL);
}
return(ctxt);
}
/**
* htmlCreateMemoryParserCtxt:
* @buffer: a pointer to a char array
* @size: the size of the array
*
* DEPRECATED: Use htmlNewParserCtxt and htmlCtxtReadMemory.
*
* Create a parser context for an HTML in-memory document. The input
* buffer must not contain any terminating null bytes.
*
* Returns the new parser context or NULL
*/
htmlParserCtxtPtr
htmlCreateMemoryParserCtxt(const char *buffer, int size) {
if (size <= 0)
return(NULL);
return(htmlCreateMemoryParserCtxtInternal(NULL, buffer, size, NULL));
}
/**
* htmlCreateDocParserCtxt:
* @str: a pointer to an array of xmlChar
* @encoding: encoding (optional)
*
* Create a parser context for a null-terminated string.
*
* Returns the new parser context or NULL if a memory allocation failed.
*/
static htmlParserCtxtPtr
htmlCreateDocParserCtxt(const xmlChar *str, const char *url,
const char *encoding) {
xmlParserCtxtPtr ctxt;
xmlParserInputPtr input;
if (str == NULL)
return(NULL);
ctxt = htmlNewParserCtxt();
if (ctxt == NULL)
return(NULL);
input = xmlCtxtNewInputFromString(ctxt, url, (const char *) str,
encoding, 0);
if (input == NULL) {
xmlFreeParserCtxt(ctxt);
return(NULL);
}
if (xmlCtxtPushInput(ctxt, input) < 0) {
xmlFreeInputStream(input);
xmlFreeParserCtxt(ctxt);
return(NULL);
}
return(ctxt);
}
#ifdef LIBXML_PUSH_ENABLED
/************************************************************************
* *
* Progressive parsing interfaces *
* *
************************************************************************/
typedef enum {
LSTATE_TAG_NAME = 0,
LSTATE_BEFORE_ATTR_NAME,
LSTATE_ATTR_NAME,
LSTATE_AFTER_ATTR_NAME,
LSTATE_BEFORE_ATTR_VALUE,
LSTATE_ATTR_VALUE_DQUOTED,
LSTATE_ATTR_VALUE_SQUOTED,
LSTATE_ATTR_VALUE_UNQUOTED
} xmlLookupStates;
/**
* htmlParseLookupGt:
* @ctxt: an HTML parser context
*
* Check whether there's enough data in the input buffer to finish parsing
* a tag. This has to take quotes into account.
*/
static int
htmlParseLookupGt(xmlParserCtxtPtr ctxt) {
const xmlChar *cur;
const xmlChar *end = ctxt->input->end;
int state = ctxt->endCheckState;
size_t index;
if (ctxt->checkIndex == 0)
cur = ctxt->input->cur + 2; /* Skip '<a' or '</' */
else
cur = ctxt->input->cur + ctxt->checkIndex;
while (cur < end) {
int c = *cur++;
if (state != LSTATE_ATTR_VALUE_SQUOTED &&
state != LSTATE_ATTR_VALUE_DQUOTED) {
if (c == '/' &&
state != LSTATE_BEFORE_ATTR_VALUE &&
state != LSTATE_ATTR_VALUE_UNQUOTED) {
state = LSTATE_BEFORE_ATTR_NAME;
continue;
} else if (c == '>') {
ctxt->checkIndex = 0;
ctxt->endCheckState = 0;
return(0);
}
}
switch (state) {
case LSTATE_TAG_NAME:
if (IS_WS_HTML(c))
state = LSTATE_BEFORE_ATTR_NAME;
break;
case LSTATE_BEFORE_ATTR_NAME:
if (!IS_WS_HTML(c))
state = LSTATE_ATTR_NAME;
break;
case LSTATE_ATTR_NAME:
if (c == '=')
state = LSTATE_BEFORE_ATTR_VALUE;
else if (IS_WS_HTML(c))
state = LSTATE_AFTER_ATTR_NAME;
break;
case LSTATE_AFTER_ATTR_NAME:
if (c == '=')
state = LSTATE_BEFORE_ATTR_VALUE;
else if (!IS_WS_HTML(c))
state = LSTATE_ATTR_NAME;
break;
case LSTATE_BEFORE_ATTR_VALUE:
if (c == '"')
state = LSTATE_ATTR_VALUE_DQUOTED;
else if (c == '\'')
state = LSTATE_ATTR_VALUE_SQUOTED;
else if (!IS_WS_HTML(c))
state = LSTATE_ATTR_VALUE_UNQUOTED;
break;
case LSTATE_ATTR_VALUE_DQUOTED:
if (c == '"')
state = LSTATE_BEFORE_ATTR_NAME;
break;
case LSTATE_ATTR_VALUE_SQUOTED:
if (c == '\'')
state = LSTATE_BEFORE_ATTR_NAME;
break;
case LSTATE_ATTR_VALUE_UNQUOTED:
if (IS_WS_HTML(c))
state = LSTATE_BEFORE_ATTR_NAME;
break;
}
}
index = cur - ctxt->input->cur;
if (index > LONG_MAX) {
ctxt->checkIndex = 0;
ctxt->endCheckState = 0;
return(0);
}
ctxt->checkIndex = index;
ctxt->endCheckState = state;
return(-1);
}
/**
* htmlParseLookupString:
* @ctxt: an XML parser context
* @startDelta: delta to apply at the start
* @str: string
* @strLen: length of string
*
* Check whether the input buffer contains a string.
*/
static int
htmlParseLookupString(xmlParserCtxtPtr ctxt, size_t startDelta,
const char *str, size_t strLen, size_t extraLen) {
const xmlChar *end = ctxt->input->end;
const xmlChar *cur, *term;
size_t index, rescan;
int ret;
if (ctxt->checkIndex == 0) {
cur = ctxt->input->cur + startDelta;
} else {
cur = ctxt->input->cur + ctxt->checkIndex;
}
term = BAD_CAST strstr((const char *) cur, str);
if ((term != NULL) &&
((size_t) (ctxt->input->end - term) >= extraLen + 1)) {
ctxt->checkIndex = 0;
if (term - ctxt->input->cur > INT_MAX / 2)
ret = INT_MAX / 2;
else
ret = term - ctxt->input->cur;
return(ret);
}
/* Rescan (strLen + extraLen - 1) characters. */
rescan = strLen + extraLen - 1;
if ((size_t) (end - cur) <= rescan)
end = cur;
else
end -= rescan;
index = end - ctxt->input->cur;
if (index > INT_MAX / 2) {
ctxt->checkIndex = 0;
ret = INT_MAX / 2;
} else {
ctxt->checkIndex = index;
ret = -1;
}
return(ret);
}
/**
* htmlParseLookupCommentEnd:
* @ctxt: an HTML parser context
*
* Try to find a comment end tag in the input stream
* The search includes "-->" as well as WHATWG-recommended incorrectly-closed tags.
* (See https://html.spec.whatwg.org/multipage/parsing.html#parse-error-incorrectly-closed-comment)
* This function has a side effect of (possibly) incrementing ctxt->checkIndex
* to avoid rescanning sequences of bytes, it DOES change the state of the
* parser, do not use liberally.
*
* Returns the index to the current parsing point if the full sequence is available, -1 otherwise.
*/
static int
htmlParseLookupCommentEnd(htmlParserCtxtPtr ctxt)
{
int mark = 0;
int offset;
while (1) {
mark = htmlParseLookupString(ctxt, 2, "--", 2, 0);
if (mark < 0)
break;
/*
* <!--> is a complete comment, but
* <!--!> is not
* <!---!> is not
* <!----!> is
*/
if ((NXT(mark+2) == '>') ||
((mark >= 4) && (NXT(mark+2) == '!') && (NXT(mark+3) == '>'))) {
ctxt->checkIndex = 0;
break;
}
offset = (NXT(mark+2) == '!') ? 3 : 2;
if (mark + offset >= ctxt->input->end - ctxt->input->cur) {
ctxt->checkIndex = mark;
return(-1);
}
ctxt->checkIndex = mark + 1;
}
return mark;
}
/**
* htmlParseTryOrFinish:
* @ctxt: an HTML parser context
* @terminate: last chunk indicator
*
* Try to progress on parsing
*
* Returns zero if no parsing was possible
*/
static void
htmlParseTryOrFinish(htmlParserCtxtPtr ctxt, int terminate) {
while (PARSER_STOPPED(ctxt) == 0) {
htmlParserInputPtr in;
size_t avail;
in = ctxt->input;
if (in == NULL) break;
avail = in->end - in->cur;
switch (ctxt->instate) {
case XML_PARSER_EOF:
/*
* Document parsing is done !
*/
return;
case XML_PARSER_START:
/*
* Very first chars read from the document flow.
*/
if ((!terminate) && (avail < 4))
return;
xmlDetectEncoding(ctxt);
/*
* TODO: Implement HTML5 prescan algorithm
*/
/*
* This is wrong but matches long-standing behavior. In most
* cases, a document starting with an XML declaration will
* specify UTF-8. The HTML5 prescan algorithm handles
* XML declarations in a better way.
*/
if (((ctxt->input->flags & XML_INPUT_HAS_ENCODING) == 0) &&
(xmlStrncmp(ctxt->input->cur, BAD_CAST "<?xm", 4) == 0)) {
xmlSwitchEncoding(ctxt, XML_CHAR_ENCODING_UTF8);
}
/* fall through */
case XML_PARSER_XML_DECL:
if ((ctxt->sax) && (ctxt->sax->setDocumentLocator)) {
ctxt->sax->setDocumentLocator(ctxt->userData,
(xmlSAXLocator *) &xmlDefaultSAXLocator);
}
if ((ctxt->sax) && (ctxt->sax->startDocument) &&
(!ctxt->disableSAX))
ctxt->sax->startDocument(ctxt->userData);
/* Allow callback to modify state for tests */
if ((ctxt->instate == XML_PARSER_START) ||
(ctxt->instate == XML_PARSER_XML_DECL))
ctxt->instate = XML_PARSER_MISC;
break;
case XML_PARSER_START_TAG:
if ((!terminate) &&
(htmlParseLookupGt(ctxt) < 0))
return;
htmlParseElementInternal(ctxt);
ctxt->instate = XML_PARSER_CONTENT;
break;
case XML_PARSER_MISC:
case XML_PARSER_PROLOG:
case XML_PARSER_CONTENT: {
int mode;
if ((ctxt->instate == XML_PARSER_MISC) ||
(ctxt->instate == XML_PARSER_PROLOG)) {
SKIP_BLANKS;
avail = in->end - in->cur;
}
if (avail < 1)
return;
/*
* Note that endCheckState is also used by
* xmlParseLookupGt.
*/
mode = ctxt->endCheckState;
if (mode != 0) {
if (htmlParseCharData(ctxt, !terminate) == 0)
return;
} else if (in->cur[0] == '<') {
int next;
if (avail < 2) {
if (!terminate)
return;
next = ' ';
} else {
next = in->cur[1];
}
if (next == '!') {
if ((!terminate) && (avail < 4))
return;
if ((in->cur[2] == '-') && (in->cur[3] == '-')) {
if ((!terminate) &&
(htmlParseLookupCommentEnd(ctxt) < 0))
return;
SKIP(4);
htmlParseComment(ctxt, /* bogus */ 0);
/* don't change state */
break;
}
if ((!terminate) && (avail < 9))
return;
if ((UPP(2) == 'D') && (UPP(3) == 'O') &&
(UPP(4) == 'C') && (UPP(5) == 'T') &&
(UPP(6) == 'Y') && (UPP(7) == 'P') &&
(UPP(8) == 'E')) {
if ((!terminate) &&
(htmlParseLookupString(ctxt, 9, ">", 1,
0) < 0))
return;
htmlParseDocTypeDecl(ctxt);
if (ctxt->instate == XML_PARSER_MISC)
ctxt->instate = XML_PARSER_PROLOG;
else
ctxt->instate = XML_PARSER_CONTENT;
} else {
ctxt->instate = XML_PARSER_CONTENT;
if ((!terminate) &&
(htmlParseLookupString(ctxt, 2, ">", 1, 0) < 0))
return;
SKIP(2);
htmlParseComment(ctxt, /* bogus */ 1);
}
} else if (next == '?') {
if ((!terminate) &&
(htmlParseLookupString(ctxt, 2, ">", 1, 0) < 0))
return;
SKIP(1);
htmlParseComment(ctxt, /* bogus */ 1);
/* don't change state */
} else if (next == '/') {
ctxt->instate = XML_PARSER_END_TAG;
ctxt->checkIndex = 0;
} else if (IS_ASCII_LETTER(next)) {
ctxt->instate = XML_PARSER_START_TAG;
ctxt->checkIndex = 0;
} else {
ctxt->instate = XML_PARSER_CONTENT;
htmlCheckParagraph(ctxt);
if ((ctxt->sax != NULL) && (!ctxt->disableSAX) &&
(ctxt->sax->characters != NULL))
ctxt->sax->characters(ctxt->userData,
BAD_CAST "<", 1);
SKIP(1);
}
} else {
ctxt->instate = XML_PARSER_CONTENT;
/*
* We follow the logic of the XML push parser
*/
if (avail < HTML_PARSER_BIG_BUFFER_SIZE) {
if ((!terminate) &&
(htmlParseLookupString(ctxt, 0, "<", 1, 0) < 0))
return;
}
ctxt->checkIndex = 0;
if (htmlParseCharData(ctxt, !terminate) == 0)
return;
}
break;
}
case XML_PARSER_END_TAG:
if ((!terminate) &&
(htmlParseLookupGt(ctxt) < 0))
return;
htmlParseEndTag(ctxt);
ctxt->instate = XML_PARSER_CONTENT;
ctxt->checkIndex = 0;
break;
default:
htmlParseErr(ctxt, XML_ERR_INTERNAL_ERROR,
"HPP: internal error\n", NULL, NULL);
ctxt->instate = XML_PARSER_EOF;
break;
}
}
}
/**
* htmlParseChunk:
* @ctxt: an HTML parser context
* @chunk: chunk of memory
* @size: size of chunk in bytes
* @terminate: last chunk indicator
*
* Parse a chunk of memory in push parser mode.
*
* Assumes that the parser context was initialized with
* htmlCreatePushParserCtxt.
*
* The last chunk, which will often be empty, must be marked with
* the @terminate flag. With the default SAX callbacks, the resulting
* document will be available in ctxt->myDoc. This pointer will not
* be freed by the library.
*
* If the document isn't well-formed, ctxt->myDoc is set to NULL.
*
* Returns an xmlParserErrors code (0 on success).
*/
int
htmlParseChunk(htmlParserCtxtPtr ctxt, const char *chunk, int size,
int terminate) {
if ((ctxt == NULL) || (ctxt->input == NULL))
return(XML_ERR_ARGUMENT);
if (PARSER_STOPPED(ctxt) != 0)
return(ctxt->errNo);
if ((size > 0) && (chunk != NULL) && (ctxt->input != NULL) &&
(ctxt->input->buf != NULL)) {
size_t pos = ctxt->input->cur - ctxt->input->base;
int res;
res = xmlParserInputBufferPush(ctxt->input->buf, size, chunk);
xmlBufUpdateInput(ctxt->input->buf->buffer, ctxt->input, pos);
if (res < 0) {
htmlParseErr(ctxt, ctxt->input->buf->error,
"xmlParserInputBufferPush failed", NULL, NULL);
xmlHaltParser(ctxt);
return (ctxt->errNo);
}
}
htmlParseTryOrFinish(ctxt, terminate);
if ((terminate) && (ctxt->instate != XML_PARSER_EOF)) {
htmlAutoCloseOnEnd(ctxt);
if ((ctxt->sax) && (ctxt->sax->endDocument != NULL))
ctxt->sax->endDocument(ctxt->userData);
if ((!(ctxt->options & HTML_PARSE_NODEFDTD)) &&
(ctxt->myDoc != NULL)) {
xmlDtdPtr dtd;
dtd = xmlGetIntSubset(ctxt->myDoc);
if (dtd == NULL) {
ctxt->myDoc->intSubset =
xmlCreateIntSubset(ctxt->myDoc, BAD_CAST "html",
BAD_CAST "-//W3C//DTD HTML 4.0 Transitional//EN",
BAD_CAST "http://www.w3.org/TR/REC-html40/loose.dtd");
if (ctxt->myDoc->intSubset == NULL)
htmlErrMemory(ctxt);
}
}
ctxt->instate = XML_PARSER_EOF;
}
return((xmlParserErrors) ctxt->errNo);
}
/************************************************************************
* *
* User entry points *
* *
************************************************************************/
/**
* htmlCreatePushParserCtxt:
* @sax: a SAX handler (optional)
* @user_data: The user data returned on SAX callbacks (optional)
* @chunk: a pointer to an array of chars (optional)
* @size: number of chars in the array
* @filename: only used for error reporting (optional)
* @enc: encoding (deprecated, pass XML_CHAR_ENCODING_NONE)
*
* Create a parser context for using the HTML parser in push mode.
*
* Returns the new parser context or NULL if a memory allocation
* failed.
*/
htmlParserCtxtPtr
htmlCreatePushParserCtxt(htmlSAXHandlerPtr sax, void *user_data,
const char *chunk, int size, const char *filename,
xmlCharEncoding enc) {
htmlParserCtxtPtr ctxt;
htmlParserInputPtr input;
const char *encoding;
ctxt = htmlNewSAXParserCtxt(sax, user_data);
if (ctxt == NULL)
return(NULL);
encoding = xmlGetCharEncodingName(enc);
input = xmlNewPushInput(filename, chunk, size);
if (input == NULL) {
htmlFreeParserCtxt(ctxt);
return(NULL);
}
if (xmlCtxtPushInput(ctxt, input) < 0) {
xmlFreeInputStream(input);
xmlFreeParserCtxt(ctxt);
return(NULL);
}
if (encoding != NULL)
xmlSwitchEncodingName(ctxt, encoding);
return(ctxt);
}
#endif /* LIBXML_PUSH_ENABLED */
/**
* htmlSAXParseDoc:
* @cur: a pointer to an array of xmlChar
* @encoding: a free form C string describing the HTML document encoding, or NULL
* @sax: the SAX handler block
* @userData: if using SAX, this pointer will be provided on callbacks.
*
* DEPRECATED: Use htmlNewSAXParserCtxt and htmlCtxtReadDoc.
*
* Parse an HTML in-memory document. If sax is not NULL, use the SAX callbacks
* to handle parse events. If sax is NULL, fallback to the default DOM
* behavior and return a tree.
*
* Returns the resulting document tree unless SAX is NULL or the document is
* not well formed.
*/
htmlDocPtr
htmlSAXParseDoc(const xmlChar *cur, const char *encoding,
htmlSAXHandlerPtr sax, void *userData) {
htmlDocPtr ret;
htmlParserCtxtPtr ctxt;
if (cur == NULL)
return(NULL);
ctxt = htmlCreateDocParserCtxt(cur, NULL, encoding);
if (ctxt == NULL)
return(NULL);
if (sax != NULL) {
*ctxt->sax = *sax;
ctxt->userData = userData;
}
htmlParseDocument(ctxt);
ret = ctxt->myDoc;
htmlFreeParserCtxt(ctxt);
return(ret);
}
/**
* htmlParseDoc:
* @cur: a pointer to an array of xmlChar
* @encoding: the encoding (optional)
*
* DEPRECATED: Use htmlReadDoc.
*
* Parse an HTML in-memory document and build a tree.
*
* This function uses deprecated global parser options.
*
* Returns the resulting document tree
*/
htmlDocPtr
htmlParseDoc(const xmlChar *cur, const char *encoding) {
return(htmlSAXParseDoc(cur, encoding, NULL, NULL));
}
/**
* htmlCreateFileParserCtxt:
* @filename: the filename
* @encoding: optional encoding
*
* DEPRECATED: Use htmlNewParserCtxt and htmlCtxtReadFile.
*
* Create a parser context to read from a file.
*
* A non-NULL encoding overrides encoding declarations in the document.
*
* Automatic support for ZLIB/Compress compressed document is provided
* by default if found at compile-time.
*
* Returns the new parser context or NULL if a memory allocation failed.
*/
htmlParserCtxtPtr
htmlCreateFileParserCtxt(const char *filename, const char *encoding)
{
htmlParserCtxtPtr ctxt;
htmlParserInputPtr input;
if (filename == NULL)
return(NULL);
ctxt = htmlNewParserCtxt();
if (ctxt == NULL) {
return(NULL);
}
input = xmlCtxtNewInputFromUrl(ctxt, filename, NULL, encoding, 0);
if (input == NULL) {
xmlFreeParserCtxt(ctxt);
return(NULL);
}
if (xmlCtxtPushInput(ctxt, input) < 0) {
xmlFreeInputStream(input);
xmlFreeParserCtxt(ctxt);
return(NULL);
}
return(ctxt);
}
/**
* htmlSAXParseFile:
* @filename: the filename
* @encoding: encoding (optional)
* @sax: the SAX handler block
* @userData: if using SAX, this pointer will be provided on callbacks.
*
* DEPRECATED: Use htmlNewSAXParserCtxt and htmlCtxtReadFile.
*
* 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 unless SAX is NULL or the document is
* not well formed.
*/
htmlDocPtr
htmlSAXParseFile(const char *filename, const char *encoding, htmlSAXHandlerPtr sax,
void *userData) {
htmlDocPtr ret;
htmlParserCtxtPtr ctxt;
htmlSAXHandlerPtr oldsax = NULL;
ctxt = htmlCreateFileParserCtxt(filename, encoding);
if (ctxt == NULL) return(NULL);
if (sax != NULL) {
oldsax = ctxt->sax;
ctxt->sax = sax;
ctxt->userData = userData;
}
htmlParseDocument(ctxt);
ret = ctxt->myDoc;
if (sax != NULL) {
ctxt->sax = oldsax;
ctxt->userData = NULL;
}
htmlFreeParserCtxt(ctxt);
return(ret);
}
/**
* htmlParseFile:
* @filename: the filename
* @encoding: encoding (optional)
*
* Parse an HTML file and build a tree.
*
* Returns the resulting document tree
*/
htmlDocPtr
htmlParseFile(const char *filename, const char *encoding) {
return(htmlSAXParseFile(filename, encoding, NULL, NULL));
}
/**
* htmlHandleOmittedElem:
* @val: int 0 or 1
*
* DEPRECATED: Use HTML_PARSE_NOIMPLIED
*
* Set and return the previous value for handling HTML omitted tags.
*
* Returns the last value for 0 for no handling, 1 for auto insertion.
*/
int
htmlHandleOmittedElem(int val) {
int old = htmlOmittedDefaultValue;
htmlOmittedDefaultValue = val;
return(old);
}
/**
* htmlElementAllowedHere:
* @parent: HTML parent element
* @elt: HTML element
*
* DEPRECATED: Don't use.
*
* Returns 1
*/
int
htmlElementAllowedHere(const htmlElemDesc* parent ATTRIBUTE_UNUSED,
const xmlChar* elt ATTRIBUTE_UNUSED) {
return(1);
}
/**
* htmlElementStatusHere:
* @parent: HTML parent element
* @elt: HTML element
*
* DEPRECATED: Don't use.
*
* Returns HTML_VALID
*/
htmlStatus
htmlElementStatusHere(const htmlElemDesc* parent ATTRIBUTE_UNUSED,
const htmlElemDesc* elt ATTRIBUTE_UNUSED) {
return(HTML_VALID);
}
/**
* htmlAttrAllowed:
* @elt: HTML element
* @attr: HTML attribute
* @legacy: whether to allow deprecated attributes
*
* DEPRECATED: Don't use.
*
* Returns HTML_VALID
*/
htmlStatus
htmlAttrAllowed(const htmlElemDesc* elt ATTRIBUTE_UNUSED,
const xmlChar* attr ATTRIBUTE_UNUSED,
int legacy ATTRIBUTE_UNUSED) {
return(HTML_VALID);
}
/**
* htmlNodeStatus:
* @node: an htmlNodePtr in a tree
* @legacy: whether to allow deprecated elements (YES is faster here
* for Element nodes)
*
* DEPRECATED: Don't use.
*
* Returns HTML_VALID
*/
htmlStatus
htmlNodeStatus(htmlNodePtr node ATTRIBUTE_UNUSED,
int legacy ATTRIBUTE_UNUSED) {
return(HTML_VALID);
}
/************************************************************************
* *
* New set (2.6.0) of simpler and more flexible APIs *
* *
************************************************************************/
/**
* DICT_FREE:
* @str: a string
*
* Free a string if it is not owned by the "dict" dictionary in the
* current scope
*/
#define DICT_FREE(str) \
if ((str) && ((!dict) || \
(xmlDictOwns(dict, (const xmlChar *)(str)) == 0))) \
xmlFree((char *)(str));
/**
* htmlCtxtReset:
* @ctxt: an HTML parser context
*
* Reset a parser context
*/
void
htmlCtxtReset(htmlParserCtxtPtr ctxt)
{
xmlParserInputPtr input;
xmlDictPtr dict;
if (ctxt == NULL)
return;
dict = ctxt->dict;
while ((input = xmlCtxtPopInput(ctxt)) != NULL) { /* Non consuming */
xmlFreeInputStream(input);
}
ctxt->inputNr = 0;
ctxt->input = NULL;
ctxt->spaceNr = 0;
if (ctxt->spaceTab != NULL) {
ctxt->spaceTab[0] = -1;
ctxt->space = &ctxt->spaceTab[0];
} else {
ctxt->space = NULL;
}
ctxt->nodeNr = 0;
ctxt->node = NULL;
ctxt->nameNr = 0;
ctxt->name = NULL;
ctxt->nsNr = 0;
DICT_FREE(ctxt->version);
ctxt->version = NULL;
DICT_FREE(ctxt->encoding);
ctxt->encoding = NULL;
DICT_FREE(ctxt->extSubURI);
ctxt->extSubURI = NULL;
DICT_FREE(ctxt->extSubSystem);
ctxt->extSubSystem = NULL;
if (ctxt->directory != NULL) {
xmlFree(ctxt->directory);
ctxt->directory = NULL;
}
if (ctxt->myDoc != NULL)
xmlFreeDoc(ctxt->myDoc);
ctxt->myDoc = NULL;
ctxt->standalone = -1;
ctxt->hasExternalSubset = 0;
ctxt->hasPErefs = 0;
ctxt->html = 1;
ctxt->instate = XML_PARSER_START;
ctxt->wellFormed = 1;
ctxt->nsWellFormed = 1;
ctxt->disableSAX = 0;
ctxt->valid = 1;
ctxt->vctxt.userData = ctxt;
ctxt->vctxt.flags = XML_VCTXT_USE_PCTXT;
ctxt->vctxt.error = xmlParserValidityError;
ctxt->vctxt.warning = xmlParserValidityWarning;
ctxt->record_info = 0;
ctxt->checkIndex = 0;
ctxt->endCheckState = 0;
ctxt->inSubset = 0;
ctxt->errNo = XML_ERR_OK;
ctxt->depth = 0;
ctxt->catalogs = NULL;
xmlInitNodeInfoSeq(&ctxt->node_seq);
if (ctxt->attsDefault != NULL) {
xmlHashFree(ctxt->attsDefault, xmlHashDefaultDeallocator);
ctxt->attsDefault = NULL;
}
if (ctxt->attsSpecial != NULL) {
xmlHashFree(ctxt->attsSpecial, NULL);
ctxt->attsSpecial = NULL;
}
ctxt->nbErrors = 0;
ctxt->nbWarnings = 0;
if (ctxt->lastError.code != XML_ERR_OK)
xmlResetError(&ctxt->lastError);
}
static int
htmlCtxtSetOptionsInternal(xmlParserCtxtPtr ctxt, int options, int keepMask)
{
int allMask;
if (ctxt == NULL)
return(-1);
allMask = HTML_PARSE_RECOVER |
HTML_PARSE_HTML5 |
HTML_PARSE_NODEFDTD |
HTML_PARSE_NOERROR |
HTML_PARSE_NOWARNING |
HTML_PARSE_PEDANTIC |
HTML_PARSE_NOBLANKS |
HTML_PARSE_NONET |
HTML_PARSE_NOIMPLIED |
HTML_PARSE_COMPACT |
HTML_PARSE_HUGE |
HTML_PARSE_IGNORE_ENC |
HTML_PARSE_BIG_LINES;
ctxt->options = (ctxt->options & keepMask) | (options & allMask);
/*
* For some options, struct members are historically the source
* of truth. See xmlCtxtSetOptionsInternal.
*/
ctxt->keepBlanks = (options & HTML_PARSE_NOBLANKS) ? 0 : 1;
/*
* Changing SAX callbacks is a bad idea. This should be fixed.
*/
if (options & HTML_PARSE_NOBLANKS) {
ctxt->sax->ignorableWhitespace = xmlSAX2IgnorableWhitespace;
}
if (options & HTML_PARSE_HUGE) {
if (ctxt->dict != NULL)
xmlDictSetLimit(ctxt->dict, 0);
}
/*
* It would be useful to allow this feature.
*/
ctxt->dictNames = 0;
ctxt->linenumbers = 1;
return(options & ~allMask);
}
/**
* htmlCtxtSetOptions:
* @ctxt: an HTML parser context
* @options: a bitmask of xmlParserOption values
*
* Applies the options to the parser context. Unset options are
* cleared.
*
* Available since 2.14.0. With older versions, you can use
* htmlCtxtUseOptions.
*
* HTML_PARSE_RECOVER
*
* No effect as of 2.14.0.
*
* HTML_PARSE_HTML5
*
* Make the tokenizer emit a SAX callback for each token. This results
* in unbalanced invocations of startElement and endElement.
*
* For now, this is only usable with custom SAX callbacks.
*
* HTML_PARSE_NODEFDTD
*
* Do not default to a doctype if none was found.
*
* HTML_PARSE_NOERROR
*
* Disable error and warning reports to the error handlers.
* Errors are still accessible with xmlCtxtGetLastError.
*
* HTML_PARSE_NOWARNING
*
* Disable warning reports.
*
* HTML_PARSE_PEDANTIC
*
* No effect.
*
* HTML_PARSE_NOBLANKS
*
* Remove some text nodes containing only whitespace from the
* result document. Which nodes are removed depends on a conservative
* heuristic. The reindenting feature of the serialization code relies
* on this option to be set when parsing. Use of this option is
* DISCOURAGED.
*
* HTML_PARSE_NONET
*
* No effect.
*
* HTML_PARSE_NOIMPLIED
*
* Do not add implied html, head or body elements.
*
* HTML_PARSE_COMPACT
*
* Store small strings directly in the node struct to save
* memory.
*
* HTML_PARSE_HUGE
*
* Relax some internal limits.
*
* Available since 2.14.0. Use XML_PARSE_HUGE works with older
* versions.
*
* Maximum size of text nodes, tags, comments, CDATA sections
*
* normal: 10M
* huge: 1B
*
* Maximum size of names, system literals, pubid literals
*
* normal: 50K
* huge: 10M
*
* Maximum nesting depth of elements
*
* normal: 256
* huge: 2048
*
* HTML_PARSE_IGNORE_ENC
*
* Ignore the encoding in the HTML declaration. This option is
* mostly unneeded these days. The only effect is to enforce
* UTF-8 decoding of ASCII-like data.
*
* HTML_PARSE_BIG_LINES
*
* Enable reporting of line numbers larger than 65535.
*
* Available since 2.14.0.
*
* Returns 0 in case of success, the set of unknown or unimplemented options
* in case of error.
*/
int
htmlCtxtSetOptions(xmlParserCtxtPtr ctxt, int options)
{
return(htmlCtxtSetOptionsInternal(ctxt, options, 0));
}
/**
* htmlCtxtUseOptions:
* @ctxt: an HTML parser context
* @options: a combination of htmlParserOption(s)
*
* DEPRECATED: Use htmlCtxtSetOptions.
*
* Applies the options to the parser context. The following options
* are never cleared and can only be enabled:
*
* HTML_PARSE_NODEFDTD
* HTML_PARSE_NOERROR
* HTML_PARSE_NOWARNING
* HTML_PARSE_NOIMPLIED
* HTML_PARSE_COMPACT
* HTML_PARSE_HUGE
* HTML_PARSE_IGNORE_ENC
* HTML_PARSE_BIG_LINES
*
* Returns 0 in case of success, the set of unknown or unimplemented options
* in case of error.
*/
int
htmlCtxtUseOptions(htmlParserCtxtPtr ctxt, int options)
{
int keepMask;
/*
* For historic reasons, some options can only be enabled.
*/
keepMask = HTML_PARSE_NODEFDTD |
HTML_PARSE_NOERROR |
HTML_PARSE_NOWARNING |
HTML_PARSE_NOIMPLIED |
HTML_PARSE_COMPACT |
HTML_PARSE_HUGE |
HTML_PARSE_IGNORE_ENC |
HTML_PARSE_BIG_LINES;
return(htmlCtxtSetOptionsInternal(ctxt, options, keepMask));
}
/**
* htmlCtxtParseDocument:
* @ctxt: an HTML parser context
* @input: parser input
*
* Parse an HTML document and return the resulting document tree.
*
* Available since 2.13.0.
*
* Returns the resulting document tree or NULL
*/
htmlDocPtr
htmlCtxtParseDocument(htmlParserCtxtPtr ctxt, xmlParserInputPtr input)
{
htmlDocPtr ret;
if ((ctxt == NULL) || (input == NULL)) {
xmlFatalErr(ctxt, XML_ERR_ARGUMENT, NULL);
xmlFreeInputStream(input);
return(NULL);
}
/* assert(ctxt->inputNr == 0); */
while (ctxt->inputNr > 0)
xmlFreeInputStream(xmlCtxtPopInput(ctxt));
if (xmlCtxtPushInput(ctxt, input) < 0) {
xmlFreeInputStream(input);
return(NULL);
}
ctxt->html = 1;
htmlParseDocument(ctxt);
if (ctxt->errNo != XML_ERR_NO_MEMORY) {
ret = ctxt->myDoc;
} else {
ret = NULL;
xmlFreeDoc(ctxt->myDoc);
}
ctxt->myDoc = NULL;
/* assert(ctxt->inputNr == 1); */
while (ctxt->inputNr > 0)
xmlFreeInputStream(xmlCtxtPopInput(ctxt));
return(ret);
}
/**
* htmlReadDoc:
* @str: a pointer to a zero terminated string
* @url: only used for error reporting (optoinal)
* @encoding: the document encoding (optional)
* @options: a combination of htmlParserOptions
*
* Convenience function to parse an HTML document from a zero-terminated
* string.
*
* See htmlCtxtReadDoc for details.
*
* Returns the resulting document tree.
*/
htmlDocPtr
htmlReadDoc(const xmlChar *str, const char *url, const char *encoding,
int options)
{
htmlParserCtxtPtr ctxt;
xmlParserInputPtr input;
htmlDocPtr doc = NULL;
ctxt = htmlNewParserCtxt();
if (ctxt == NULL)
return(NULL);
htmlCtxtUseOptions(ctxt, options);
input = xmlCtxtNewInputFromString(ctxt, url, (const char *) str, encoding,
XML_INPUT_BUF_STATIC);
if (input != NULL)
doc = htmlCtxtParseDocument(ctxt, input);
htmlFreeParserCtxt(ctxt);
return(doc);
}
/**
* htmlReadFile:
* @filename: a file or URL
* @encoding: the document encoding (optional)
* @options: a combination of htmlParserOptions
*
* Convenience function to parse an HTML file from the filesystem,
* the network or a global user-defined resource loader.
*
* See htmlCtxtReadFile for details.
*
* Returns the resulting document tree.
*/
htmlDocPtr
htmlReadFile(const char *filename, const char *encoding, int options)
{
htmlParserCtxtPtr ctxt;
xmlParserInputPtr input;
htmlDocPtr doc = NULL;
ctxt = htmlNewParserCtxt();
if (ctxt == NULL)
return(NULL);
htmlCtxtUseOptions(ctxt, options);
input = xmlCtxtNewInputFromUrl(ctxt, filename, NULL, encoding, 0);
if (input != NULL)
doc = htmlCtxtParseDocument(ctxt, input);
htmlFreeParserCtxt(ctxt);
return(doc);
}
/**
* htmlReadMemory:
* @buffer: a pointer to a char array
* @size: the size of the array
* @url: only used for error reporting (optional)
* @encoding: the document encoding, or NULL
* @options: a combination of htmlParserOption(s)
*
* Convenience function to parse an HTML document from memory.
* The input buffer must not contain any terminating null bytes.
*
* See htmlCtxtReadMemory for details.
*
* Returns the resulting document tree
*/
htmlDocPtr
htmlReadMemory(const char *buffer, int size, const char *url,
const char *encoding, int options)
{
htmlParserCtxtPtr ctxt;
xmlParserInputPtr input;
htmlDocPtr doc = NULL;
if (size < 0)
return(NULL);
ctxt = htmlNewParserCtxt();
if (ctxt == NULL)
return(NULL);
htmlCtxtUseOptions(ctxt, options);
input = xmlCtxtNewInputFromMemory(ctxt, url, buffer, size, encoding,
XML_INPUT_BUF_STATIC);
if (input != NULL)
doc = htmlCtxtParseDocument(ctxt, input);
htmlFreeParserCtxt(ctxt);
return(doc);
}
/**
* htmlReadFd:
* @fd: an open file descriptor
* @url: only used for error reporting (optional)
* @encoding: the document encoding, or NULL
* @options: a combination of htmlParserOptions
*
* Convenience function to parse an HTML document from a
* file descriptor.
*
* NOTE that the file descriptor will not be closed when the
* context is freed or reset.
*
* See htmlCtxtReadFd for details.
*
* Returns the resulting document tree
*/
htmlDocPtr
htmlReadFd(int fd, const char *url, const char *encoding, int options)
{
htmlParserCtxtPtr ctxt;
xmlParserInputPtr input;
htmlDocPtr doc = NULL;
ctxt = htmlNewParserCtxt();
if (ctxt == NULL)
return(NULL);
htmlCtxtUseOptions(ctxt, options);
input = xmlCtxtNewInputFromFd(ctxt, url, fd, encoding, 0);
if (input != NULL)
doc = htmlCtxtParseDocument(ctxt, input);
htmlFreeParserCtxt(ctxt);
return(doc);
}
/**
* htmlReadIO:
* @ioread: an I/O read function
* @ioclose: an I/O close function (optional)
* @ioctx: an I/O handler
* @url: only used for error reporting (optional)
* @encoding: the document encoding (optional)
* @options: a combination of htmlParserOption(s)
*
* Convenience function to parse an HTML document from I/O functions
* and context.
*
* See htmlCtxtReadIO for details.
*
* Returns the resulting document tree
*/
htmlDocPtr
htmlReadIO(xmlInputReadCallback ioread, xmlInputCloseCallback ioclose,
void *ioctx, const char *url, const char *encoding, int options)
{
htmlParserCtxtPtr ctxt;
xmlParserInputPtr input;
htmlDocPtr doc = NULL;
ctxt = htmlNewParserCtxt();
if (ctxt == NULL)
return (NULL);
htmlCtxtUseOptions(ctxt, options);
input = xmlCtxtNewInputFromIO(ctxt, url, ioread, ioclose, ioctx,
encoding, 0);
if (input != NULL)
doc = htmlCtxtParseDocument(ctxt, input);
htmlFreeParserCtxt(ctxt);
return(doc);
}
/**
* htmlCtxtReadDoc:
* @ctxt: an HTML parser context
* @str: a pointer to a zero terminated string
* @URL: only used for error reporting (optional)
* @encoding: the document encoding (optional)
* @options: a combination of htmlParserOptions
*
* Parse an HTML in-memory document and build a tree.
*
* See htmlCtxtUseOptions for details.
*
* Returns the resulting document tree
*/
htmlDocPtr
htmlCtxtReadDoc(htmlParserCtxtPtr ctxt, const xmlChar *str,
const char *URL, const char *encoding, int options)
{
xmlParserInputPtr input;
if (ctxt == NULL)
return (NULL);
htmlCtxtReset(ctxt);
htmlCtxtUseOptions(ctxt, options);
input = xmlCtxtNewInputFromString(ctxt, URL, (const char *) str,
encoding, 0);
if (input == NULL)
return(NULL);
return(htmlCtxtParseDocument(ctxt, input));
}
/**
* htmlCtxtReadFile:
* @ctxt: an HTML parser context
* @filename: a file or URL
* @encoding: the document encoding (optional)
* @options: a combination of htmlParserOptions
*
* Parse an HTML file from the filesystem, the network or a
* user-defined resource loader.
*
* See htmlCtxtUseOptions for details.
*
* Returns the resulting document tree
*/
htmlDocPtr
htmlCtxtReadFile(htmlParserCtxtPtr ctxt, const char *filename,
const char *encoding, int options)
{
xmlParserInputPtr input;
if (ctxt == NULL)
return (NULL);
htmlCtxtReset(ctxt);
htmlCtxtUseOptions(ctxt, options);
input = xmlCtxtNewInputFromUrl(ctxt, filename, NULL, encoding, 0);
if (input == NULL)
return(NULL);
return(htmlCtxtParseDocument(ctxt, input));
}
/**
* htmlCtxtReadMemory:
* @ctxt: an HTML parser context
* @buffer: a pointer to a char array
* @size: the size of the array
* @URL: only used for error reporting (optional)
* @encoding: the document encoding (optinal)
* @options: a combination of htmlParserOptions
*
* Parse an HTML in-memory document and build a tree. The input buffer must
* not contain any terminating null bytes.
*
* See htmlCtxtUseOptions for details.
*
* Returns the resulting document tree
*/
htmlDocPtr
htmlCtxtReadMemory(htmlParserCtxtPtr ctxt, const char *buffer, int size,
const char *URL, const char *encoding, int options)
{
xmlParserInputPtr input;
if ((ctxt == NULL) || (size < 0))
return (NULL);
htmlCtxtReset(ctxt);
htmlCtxtUseOptions(ctxt, options);
input = xmlCtxtNewInputFromMemory(ctxt, URL, buffer, size, encoding,
XML_INPUT_BUF_STATIC);
if (input == NULL)
return(NULL);
return(htmlCtxtParseDocument(ctxt, input));
}
/**
* htmlCtxtReadFd:
* @ctxt: an HTML parser context
* @fd: an open file descriptor
* @URL: only used for error reporting (optional)
* @encoding: the document encoding (optinal)
* @options: a combination of htmlParserOptions
*
* Parse an HTML from a file descriptor and build a tree.
*
* See htmlCtxtUseOptions for details.
*
* NOTE that the file descriptor will not be closed when the
* context is freed or reset.
*
* Returns the resulting document tree
*/
htmlDocPtr
htmlCtxtReadFd(htmlParserCtxtPtr ctxt, int fd,
const char *URL, const char *encoding, int options)
{
xmlParserInputPtr input;
if (ctxt == NULL)
return(NULL);
htmlCtxtReset(ctxt);
htmlCtxtUseOptions(ctxt, options);
input = xmlCtxtNewInputFromFd(ctxt, URL, fd, encoding, 0);
if (input == NULL)
return(NULL);
return(htmlCtxtParseDocument(ctxt, input));
}
/**
* htmlCtxtReadIO:
* @ctxt: an HTML parser context
* @ioread: an I/O read function
* @ioclose: an I/O close function
* @ioctx: an I/O handler
* @URL: the base URL to use for the document
* @encoding: the document encoding, or NULL
* @options: a combination of htmlParserOption(s)
*
* Parse an HTML document from I/O functions and source and build a tree.
*
* See htmlCtxtUseOptions for details.
*
* Returns the resulting document tree
*/
htmlDocPtr
htmlCtxtReadIO(htmlParserCtxtPtr ctxt, xmlInputReadCallback ioread,
xmlInputCloseCallback ioclose, void *ioctx,
const char *URL,
const char *encoding, int options)
{
xmlParserInputPtr input;
if (ctxt == NULL)
return (NULL);
htmlCtxtReset(ctxt);
htmlCtxtUseOptions(ctxt, options);
input = xmlCtxtNewInputFromIO(ctxt, URL, ioread, ioclose, ioctx,
encoding, 0);
if (input == NULL)
return(NULL);
return(htmlCtxtParseDocument(ctxt, input));
}
#endif /* LIBXML_HTML_ENABLED */