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gerrit-public.fairphone.software / fp2-dev / platform / external / libxml2 / bf95fd2390eaee24fdf9661343d2551c97237ef4 / . / HTMLparser.c
blob: 2e646ad2648d448d0113c1d50fe59aab10dde80f [file] [log] [blame]
/*
* HTMLparser.c : an HTML 4.0 non-verifying parser
*
* See Copyright for the status of this software.
*
* daniel@veillard.com
*/
#define IN_LIBXML
#include "libxml.h"
#ifdef LIBXML_HTML_ENABLED
#include <string.h>
#ifdef HAVE_CTYPE_H
#include <ctype.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_ZLIB_H
#include <zlib.h>
#endif
#include <libxml/xmlmemory.h>
#include <libxml/tree.h>
#include <libxml/parser.h>
#include <libxml/parserInternals.h>
#include <libxml/xmlerror.h>
#include <libxml/HTMLparser.h>
#include <libxml/HTMLtree.h>
#include <libxml/entities.h>
#include <libxml/encoding.h>
#include <libxml/valid.h>
#include <libxml/xmlIO.h>
#include <libxml/globals.h>
#include <libxml/uri.h>
#define HTML_MAX_NAMELEN 1000
#define HTML_PARSER_BIG_BUFFER_SIZE 1000
#define HTML_PARSER_BUFFER_SIZE 100
/* #define DEBUG */
/* #define DEBUG_PUSH */
static int htmlOmittedDefaultValue = 1;
xmlChar * htmlDecodeEntities(htmlParserCtxtPtr ctxt, int len,
xmlChar end, xmlChar end2, xmlChar end3);
static void htmlParseComment(htmlParserCtxtPtr ctxt);
/************************************************************************
* *
* Some factorized error routines *
* *
************************************************************************/
/**
* htmlErrMemory:
* @ctxt: an HTML parser context
* @extra: extra informations
*
* Handle a redefinition of attribute error
*/
static void
htmlErrMemory(xmlParserCtxtPtr ctxt, const char *extra)
{
if ((ctxt != NULL) && (ctxt->disableSAX != 0) &&
(ctxt->instate == XML_PARSER_EOF))
return;
if (ctxt != NULL) {
ctxt->errNo = XML_ERR_NO_MEMORY;
ctxt->instate = XML_PARSER_EOF;
ctxt->disableSAX = 1;
}
if (extra)
__xmlRaiseError(NULL, NULL, NULL, ctxt, NULL, XML_FROM_PARSER,
XML_ERR_NO_MEMORY, XML_ERR_FATAL, NULL, 0, extra,
NULL, NULL, 0, 0,
"Memory allocation failed : %s\n", extra);
else
__xmlRaiseError(NULL, NULL, NULL, ctxt, NULL, XML_FROM_PARSER,
XML_ERR_NO_MEMORY, XML_ERR_FATAL, NULL, 0, NULL,
NULL, NULL, 0, 0, "Memory allocation failed\n");
}
/**
* 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
htmlParseErr(xmlParserCtxtPtr ctxt, xmlParserErrors error,
const char *msg, const xmlChar *str1, const xmlChar *str2)
{
if ((ctxt != NULL) && (ctxt->disableSAX != 0) &&
(ctxt->instate == XML_PARSER_EOF))
return;
if (ctxt != NULL)
ctxt->errNo = error;
__xmlRaiseError(NULL, NULL, NULL, ctxt, NULL, XML_FROM_HTML, error,
XML_ERR_ERROR, NULL, 0,
(const char *) str1, (const char *) str2,
NULL, 0, 0,
msg, str1, str2);
if (ctxt != NULL)
ctxt->wellFormed = 0;
}
/**
* htmlParseErrInt:
* @ctxt: an HTML parser context
* @error: the error number
* @msg: the error message
* @val: integer info
*
* Handle a fatal parser error, i.e. violating Well-Formedness constraints
*/
static void
htmlParseErrInt(xmlParserCtxtPtr ctxt, xmlParserErrors error,
const char *msg, int val)
{
if ((ctxt != NULL) && (ctxt->disableSAX != 0) &&
(ctxt->instate == XML_PARSER_EOF))
return;
if (ctxt != NULL)
ctxt->errNo = error;
__xmlRaiseError(NULL, NULL, NULL, ctxt, NULL, XML_FROM_HTML, error,
XML_ERR_ERROR, NULL, 0, NULL, NULL,
NULL, val, 0, msg, val);
if (ctxt != NULL)
ctxt->wellFormed = 0;
}
/************************************************************************
* *
* 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 0 in case of error, the index in the stack otherwise
*/
static int
htmlnamePush(htmlParserCtxtPtr ctxt, const xmlChar * value)
{
if (ctxt->nameNr >= ctxt->nameMax) {
ctxt->nameMax *= 2;
ctxt->nameTab = (const xmlChar * *)
xmlRealloc((xmlChar * *)ctxt->nameTab,
ctxt->nameMax *
sizeof(ctxt->nameTab[0]));
if (ctxt->nameTab == NULL) {
htmlErrMemory(ctxt, NULL);
return (0);
}
}
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);
}
/*
* 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
*
* CURRENT Returns the current char value, with the full decoding of
* UTF-8 if we are using this mode. It returns an int.
* NEXT Skip to the next character, this does the proper decoding
* in UTF-8 mode. It also pop-up unfinished entities on the fly.
* NEXTL(l) Skip the current unicode character of l xmlChars long.
* COPY(to) copy one char to *to, increment CUR_PTR and to accordingly
*/
#define UPPER (toupper(*ctxt->input->cur))
#define SKIP(val) ctxt->nbChars += (val),ctxt->input->cur += (val),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 SHRINK if ((ctxt->input->cur - ctxt->input->base > 2 * INPUT_CHUNK) && \
(ctxt->input->end - ctxt->input->cur < 2 * INPUT_CHUNK)) \
xmlParserInputShrink(ctxt->input)
#define GROW if ((ctxt->progressive == 0) && \
(ctxt->input->end - ctxt->input->cur < INPUT_CHUNK)) \
xmlParserInputGrow(ctxt->input, INPUT_CHUNK)
#define CURRENT ((int) (*ctxt->input->cur))
#define SKIP_BLANKS htmlSkipBlankChars(ctxt)
/* Inported from XML */
/* #define CUR (ctxt->token ? ctxt->token : (int) (*ctxt->input->cur)) */
#define CUR ((int) (*ctxt->input->cur))
#define NEXT xmlNextChar(ctxt)
#define RAW (ctxt->token ? -1 : (*ctxt->input->cur))
#define NXT(val) ctxt->input->cur[(val)]
#define CUR_PTR ctxt->input->cur
#define NEXTL(l) do { \
if (*(ctxt->input->cur) == '\n') { \
ctxt->input->line++; ctxt->input->col = 1; \
} else ctxt->input->col++; \
ctxt->token = 0; ctxt->input->cur += l; ctxt->nbChars++; \
} while (0)
/************
\
if (*ctxt->input->cur == '%') xmlParserHandlePEReference(ctxt); \
if (*ctxt->input->cur == '&') xmlParserHandleReference(ctxt);
************/
#define CUR_CHAR(l) htmlCurrentChar(ctxt, &l)
#define CUR_SCHAR(s, l) xmlStringCurrentChar(ctxt, s, &l)
#define COPY_BUF(l,b,i,v) \
if (l == 1) b[i++] = (xmlChar) v; \
else i += xmlCopyChar(l,&b[i],v)
/**
* htmlCurrentChar:
* @ctxt: the HTML parser context
* @len: pointer to the length of the char read
*
* The current char value, if using UTF-8 this may actually span multiple
* bytes in the input buffer. Implement the end of line normalization:
* 2.11 End-of-Line Handling
* If the encoding is unspecified, in the case we find an ISO-Latin-1
* char, then the encoding converter is plugged in automatically.
*
* Returns the current char value and its length
*/
static int
htmlCurrentChar(xmlParserCtxtPtr ctxt, int *len) {
if (ctxt->instate == XML_PARSER_EOF)
return(0);
if (ctxt->token != 0) {
*len = 0;
return(ctxt->token);
}
if (ctxt->charset == XML_CHAR_ENCODING_UTF8) {
/*
* We are supposed to handle UTF8, check it's valid
* From rfc2044: encoding of the Unicode values on UTF-8:
*
* UCS-4 range (hex.) UTF-8 octet sequence (binary)
* 0000 0000-0000 007F 0xxxxxxx
* 0000 0080-0000 07FF 110xxxxx 10xxxxxx
* 0000 0800-0000 FFFF 1110xxxx 10xxxxxx 10xxxxxx
*
* Check for the 0x110000 limit too
*/
const unsigned char *cur = ctxt->input->cur;
unsigned char c;
unsigned int val;
c = *cur;
if (c & 0x80) {
if (cur[1] == 0)
xmlParserInputGrow(ctxt->input, INPUT_CHUNK);
if ((cur[1] & 0xc0) != 0x80)
goto encoding_error;
if ((c & 0xe0) == 0xe0) {
if (cur[2] == 0)
xmlParserInputGrow(ctxt->input, INPUT_CHUNK);
if ((cur[2] & 0xc0) != 0x80)
goto encoding_error;
if ((c & 0xf0) == 0xf0) {
if (cur[3] == 0)
xmlParserInputGrow(ctxt->input, INPUT_CHUNK);
if (((c & 0xf8) != 0xf0) ||
((cur[3] & 0xc0) != 0x80))
goto encoding_error;
/* 4-byte code */
*len = 4;
val = (cur[0] & 0x7) << 18;
val |= (cur[1] & 0x3f) << 12;
val |= (cur[2] & 0x3f) << 6;
val |= cur[3] & 0x3f;
} else {
/* 3-byte code */
*len = 3;
val = (cur[0] & 0xf) << 12;
val |= (cur[1] & 0x3f) << 6;
val |= cur[2] & 0x3f;
}
} else {
/* 2-byte code */
*len = 2;
val = (cur[0] & 0x1f) << 6;
val |= cur[1] & 0x3f;
}
if (!IS_CHAR(val)) {
htmlParseErrInt(ctxt, XML_ERR_INVALID_CHAR,
"Char 0x%X out of allowed range\n", val);
}
return(val);
} else {
/* 1-byte code */
*len = 1;
return((int) *ctxt->input->cur);
}
}
/*
* Assume it's a fixed length encoding (1) with
* a compatible encoding for the ASCII set, since
* XML constructs only use < 128 chars
*/
*len = 1;
if ((int) *ctxt->input->cur < 0x80)
return((int) *ctxt->input->cur);
/*
* Humm this is bad, do an automatic flow conversion
*/
xmlSwitchEncoding(ctxt, XML_CHAR_ENCODING_8859_1);
ctxt->charset = XML_CHAR_ENCODING_UTF8;
return(xmlCurrentChar(ctxt, len));
encoding_error:
/*
* If we detect an UTF8 error that probably mean that the
* input encoding didn't get properly advertized in the
* declaration header. Report the error and switch the encoding
* to ISO-Latin-1 (if you don't like this policy, just declare the
* encoding !)
*/
{
char buffer[150];
snprintf(buffer, 149, "Bytes: 0x%02X 0x%02X 0x%02X 0x%02X\n",
ctxt->input->cur[0], ctxt->input->cur[1],
ctxt->input->cur[2], ctxt->input->cur[3]);
htmlParseErr(ctxt, XML_ERR_INVALID_ENCODING,
"Input is not proper UTF-8, indicate encoding !\n",
BAD_CAST buffer, NULL);
}
ctxt->charset = XML_CHAR_ENCODING_8859_1;
*len = 1;
return((int) *ctxt->input->cur);
}
/**
* 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) {
int res = 0;
while (IS_BLANK_CH(*(ctxt->input->cur))) {
if ((*ctxt->input->cur == 0) &&
(xmlParserInputGrow(ctxt->input, INPUT_CHUNK) <= 0)) {
xmlPopInput(ctxt);
} else {
if (*(ctxt->input->cur) == '\n') {
ctxt->input->line++; ctxt->input->col = 1;
} else ctxt->input->col++;
ctxt->input->cur++;
ctxt->nbChars++;
if (*ctxt->input->cur == 0)
xmlParserInputGrow(ctxt->input, INPUT_CHUNK);
}
res++;
}
return(res);
}
/************************************************************************
* *
* The list of HTML elements and their properties *
* *
************************************************************************/
/*
* Start Tag: 1 means the start tag can be ommited
* End Tag: 1 means the end tag can be ommited
* 2 means it's forbidden (empty elements)
* 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
, subElements , impliedsubelt , Attributes, userdata
*/
/* Definitions and a couple of vars for HTML Elements */
#define FONTSTYLE "tt", "i", "b", "u", "s", "strike", "big", "small"
#define NB_FONTSTYLE 8
#define PHRASE "em", "strong", "dfn", "code", "samp", "kbd", "var", "cite", "abbr", "acronym"
#define NB_PHRASE 10
#define SPECIAL "a", "img", "applet", "object", "font", "basefont", "br", "script", "map", "q", "sub", "sup", "span", "bdo", "iframe"
#define NB_SPECIAL 15
#define INLINE PCDATA FONTSTYLE PHRASE SPECIAL FORMCTRL
#define NB_INLINE NB_PCDATA + NB_FONTSTYLE + NB_PHRASE + NB_SPECIAL + NB_FORMCTRL
#define BLOCK HEADING, LIST "pre", "p", "dl", "div", "center", "noscript", "noframes", "blockquote", "form", "isindex", "hr", "table", "fieldset", "address"
#define NB_BLOCK NB_HEADING + NB_LIST + 14
#define FORMCTRL "input", "select", "textarea", "label", "button"
#define NB_FORMCTRL 5
#define PCDATA
#define NB_PCDATA 0
#define HEADING "h1", "h2", "h3", "h4", "h5", "h6"
#define NB_HEADING 6
#define LIST "ul", "ol", "dir", "menu"
#define NB_LIST 4
#define MODIFIER
#define NB_MODIFIER 0
#define FLOW BLOCK,INLINE
#define NB_FLOW NB_BLOCK + NB_INLINE
#define EMPTY NULL
static const char* html_flow[] = { FLOW, NULL } ;
static const char* html_inline[] = { INLINE, NULL } ;
/* placeholders: elts with content but no subelements */
static const char* html_pcdata[] = { NULL } ;
#define html_cdata html_pcdata
/* ... and for HTML Attributes */
#define COREATTRS "id", "class", "style", "title"
#define NB_COREATTRS 4
#define I18N "lang", "dir"
#define NB_I18N 2
#define EVENTS "onclick", "ondblclick", "onmousedown", "onmouseup", "onmouseover", "onmouseout", "onkeypress", "onkeydown", "onkeyup"
#define NB_EVENTS 9
#define ATTRS COREATTRS,I18N,EVENTS
#define NB_ATTRS NB_NB_COREATTRS + NB_I18N + NB_EVENTS
#define CELLHALIGN "align", "char", "charoff"
#define NB_CELLHALIGN 3
#define CELLVALIGN "valign"
#define NB_CELLVALIGN 1
static const char* html_attrs[] = { ATTRS, NULL } ;
static const char* core_i18n_attrs[] = { COREATTRS, I18N, NULL } ;
static const char* core_attrs[] = { COREATTRS, NULL } ;
static const char* i18n_attrs[] = { I18N, NULL } ;
/* Other declarations that should go inline ... */
static const char* a_attrs[] = { ATTRS, "charset", "type", "name",
"href", "hreflang", "rel", "rev", "accesskey", "shape", "coords",
"tabindex", "onfocus", "onblur", NULL } ;
static const char* target_attr[] = { "target", NULL } ;
static const char* rows_cols_attr[] = { "rows", "cols", NULL } ;
static const char* alt_attr[] = { "alt", NULL } ;
static const char* src_alt_attrs[] = { "src", "alt", NULL } ;
static const char* href_attrs[] = { "href", NULL } ;
static const char* clear_attrs[] = { "clear", NULL } ;
static const char* inline_p[] = { INLINE, "p", NULL } ;
static const char* flow_param[] = { FLOW, "param", NULL } ;
static const char* applet_attrs[] = { COREATTRS , "codebase",
"archive", "alt", "name", "height", "width", "align",
"hspace", "vspace", NULL } ;
static const char* area_attrs[] = { "shape", "coords", "href", "nohref",
"tabindex", "accesskey", "onfocus", "onblur", NULL } ;
static const char* basefont_attrs[] =
{ "id", "size", "color", "face", NULL } ;
static const char* quote_attrs[] = { ATTRS, "cite", NULL } ;
static const char* body_contents[] = { FLOW, "ins", "del", NULL } ;
static const char* body_attrs[] = { ATTRS, "onload", "onunload", NULL } ;
static const char* body_depr[] = { "background", "bgcolor", "text",
"link", "vlink", "alink", NULL } ;
static const char* button_attrs[] = { ATTRS, "name", "value", "type",
"disabled", "tabindex", "accesskey", "onfocus", "onblur", NULL } ;
static const char* col_attrs[] = { ATTRS, "span", "width", CELLHALIGN, CELLVALIGN, NULL } ;
static const char* col_elt[] = { "col", NULL } ;
static const char* edit_attrs[] = { ATTRS, "datetime", "cite", NULL } ;
static const char* compact_attrs[] = { ATTRS, "compact", NULL } ;
static const char* dl_contents[] = { "dt", "dd", NULL } ;
static const char* compact_attr[] = { "compact", NULL } ;
static const char* label_attr[] = { "label", NULL } ;
static const char* fieldset_contents[] = { FLOW, "legend" } ;
static const char* font_attrs[] = { COREATTRS, I18N, "size", "color", "face" , NULL } ;
static const char* form_contents[] = { HEADING, LIST, INLINE, "pre", "p", "div", "center", "noscript", "noframes", "blockquote", "isindex", "hr", "table", "fieldset", "address", NULL } ;
static const char* form_attrs[] = { ATTRS, "method", "enctype", "accept", "name", "onsubmit", "onreset", "accept-charset", NULL } ;
static const char* frame_attrs[] = { COREATTRS, "longdesc", "name", "src", "frameborder", "marginwidth", "marginheight", "noresize", "scrolling" , NULL } ;
static const char* frameset_attrs[] = { COREATTRS, "rows", "cols", "onload", "onunload", NULL } ;
static const char* frameset_contents[] = { "frameset", "frame", "noframes", NULL } ;
static const char* head_attrs[] = { I18N, "profile", NULL } ;
static const char* head_contents[] = { "title", "isindex", "base", "script", "style", "meta", "link", "object", NULL } ;
static const char* hr_depr[] = { "align", "noshade", "size", "width", NULL } ;
static const char* version_attr[] = { "version", NULL } ;
static const char* html_content[] = { "head", "body", "frameset", NULL } ;
static const char* iframe_attrs[] = { COREATTRS, "longdesc", "name", "src", "frameborder", "marginwidth", "marginheight", "scrolling", "align", "height", "width", NULL } ;
static const char* img_attrs[] = { ATTRS, "longdesc", "name", "height", "width", "usemap", "ismap", NULL } ;
static const char* input_attrs[] = { ATTRS, "type", "name", "value", "checked", "disabled", "readonly", "size", "maxlength", "src", "alt", "usemap", "ismap", "tabindex", "accesskey", "onfocus", "onblur", "onselect", "onchange", "accept", NULL } ;
static const char* prompt_attrs[] = { COREATTRS, I18N, "prompt", NULL } ;
static const char* label_attrs[] = { ATTRS, "for", "accesskey", "onfocus", "onblur", NULL } ;
static const char* legend_attrs[] = { ATTRS, "accesskey", NULL } ;
static const char* align_attr[] = { "align", NULL } ;
static const char* link_attrs[] = { ATTRS, "charset", "href", "hreflang", "type", "rel", "rev", "media", NULL } ;
static const char* map_contents[] = { BLOCK, "area", NULL } ;
static const char* name_attr[] = { "name", NULL } ;
static const char* action_attr[] = { "action", NULL } ;
static const char* blockli_elt[] = { BLOCK, "li", NULL } ;
static const char* meta_attrs[] = { I18N, "http-equiv", "name", "scheme", NULL } ;
static const char* content_attr[] = { "content", NULL } ;
static const char* type_attr[] = { "type", NULL } ;
static const char* noframes_content[] = { "body", FLOW MODIFIER, NULL } ;
static const char* object_contents[] = { FLOW, "param", NULL } ;
static const char* object_attrs[] = { ATTRS, "declare", "classid", "codebase", "data", "type", "codetype", "archive", "standby", "height", "width", "usemap", "name", "tabindex", NULL } ;
static const char* object_depr[] = { "align", "border", "hspace", "vspace", NULL } ;
static const char* ol_attrs[] = { "type", "compact", "start", NULL} ;
static const char* option_elt[] = { "option", NULL } ;
static const char* optgroup_attrs[] = { ATTRS, "disabled", NULL } ;
static const char* option_attrs[] = { ATTRS, "disabled", "label", "selected", "value", NULL } ;
static const char* param_attrs[] = { "id", "value", "valuetype", "type", NULL } ;
static const char* width_attr[] = { "width", NULL } ;
static const char* pre_content[] = { PHRASE, "tt", "i", "b", "u", "s", "strike", "a", "br", "script", "map", "q", "span", "bdo", "iframe", NULL } ;
static const char* script_attrs[] = { "charset", "src", "defer", "event", "for", NULL } ;
static const char* language_attr[] = { "language", NULL } ;
static const char* select_content[] = { "optgroup", "option", NULL } ;
static const char* select_attrs[] = { ATTRS, "name", "size", "multiple", "disabled", "tabindex", "onfocus", "onblur", "onchange", NULL } ;
static const char* style_attrs[] = { I18N, "media", "title", NULL } ;
static const char* table_attrs[] = { ATTRS "summary", "width", "border", "frame", "rules", "cellspacing", "cellpadding", "datapagesize", NULL } ;
static const char* table_depr[] = { "align", "bgcolor", NULL } ;
static const char* table_contents[] = { "caption", "col", "colgroup", "thead", "tfoot", "tbody", "tr", NULL} ;
static const char* tr_elt[] = { "tr", NULL } ;
static const char* talign_attrs[] = { ATTRS, CELLHALIGN, CELLVALIGN, NULL} ;
static const char* th_td_depr[] = { "nowrap", "bgcolor", "width", "height", NULL } ;
static const char* th_td_attr[] = { ATTRS, "abbr", "axis", "headers", "scope", "rowspan", "colspan", CELLHALIGN, CELLVALIGN, NULL } ;
static const char* textarea_attrs[] = { ATTRS, "name", "disabled", "readonly", "tabindex", "accesskey", "onfocus", "onblur", "onselect", "onchange", NULL } ;
static const char* tr_contents[] = { "th", "td", NULL } ;
static const char* bgcolor_attr[] = { "bgcolor", NULL } ;
static const char* li_elt[] = { "li", NULL } ;
static const char* ul_depr[] = { "type", "compact", NULL} ;
static const char* dir_attr[] = { "dir", NULL} ;
#define DECL (const char**)
static const htmlElemDesc
html40ElementTable[] = {
{ "a", 0, 0, 0, 0, 0, 0, 1, "anchor ",
DECL html_inline , NULL , DECL a_attrs , DECL target_attr, NULL
},
{ "abbr", 0, 0, 0, 0, 0, 0, 1, "abbreviated form",
DECL html_inline , NULL , DECL html_attrs, NULL, NULL
},
{ "acronym", 0, 0, 0, 0, 0, 0, 1, "",
DECL html_inline , NULL , DECL html_attrs, NULL, NULL
},
{ "address", 0, 0, 0, 0, 0, 0, 0, "information on author ",
DECL inline_p , NULL , DECL html_attrs, NULL, NULL
},
{ "applet", 0, 0, 0, 0, 1, 1, 2, "java applet ",
DECL flow_param , NULL , NULL , DECL applet_attrs, NULL
},
{ "area", 0, 2, 2, 1, 0, 0, 0, "client-side image map area ",
EMPTY , NULL , DECL area_attrs , DECL target_attr, DECL alt_attr
},
{ "b", 0, 3, 0, 0, 0, 0, 1, "bold text style",
DECL html_inline , NULL , DECL html_attrs, NULL, NULL
},
{ "base", 0, 2, 2, 1, 0, 0, 0, "document base uri ",
EMPTY , NULL , NULL , DECL target_attr, DECL href_attrs
},
{ "basefont", 0, 2, 2, 1, 1, 1, 1, "base font size " ,
EMPTY , NULL , NULL, DECL basefont_attrs, NULL
},
{ "bdo", 0, 0, 0, 0, 0, 0, 1, "i18n bidi over-ride ",
DECL html_inline , NULL , DECL core_i18n_attrs, NULL, DECL dir_attr
},
{ "big", 0, 3, 0, 0, 0, 0, 1, "large text style",
DECL html_inline , NULL , DECL html_attrs, NULL, NULL
},
{ "blockquote", 0, 0, 0, 0, 0, 0, 0, "long quotation ",
DECL html_flow , NULL , DECL quote_attrs , NULL, NULL
},
{ "body", 1, 1, 0, 0, 0, 0, 0, "document body ",
DECL body_contents , "div" , DECL body_attrs, DECL body_depr, NULL
},
{ "br", 0, 2, 2, 1, 0, 0, 1, "forced line break ",
EMPTY , NULL , DECL core_attrs, DECL clear_attrs , NULL
},
{ "button", 0, 0, 0, 0, 0, 0, 2, "push button ",
DECL html_flow MODIFIER , NULL , DECL button_attrs, NULL, NULL
},
{ "caption", 0, 0, 0, 0, 0, 0, 0, "table caption ",
DECL html_inline , NULL , DECL html_attrs, NULL, NULL
},
{ "center", 0, 3, 0, 0, 1, 1, 0, "shorthand for div align=center ",
DECL html_flow , NULL , NULL, DECL html_attrs, NULL
},
{ "cite", 0, 0, 0, 0, 0, 0, 1, "citation",
DECL html_inline , NULL , DECL html_attrs, NULL, NULL
},
{ "code", 0, 0, 0, 0, 0, 0, 1, "computer code fragment",
DECL html_inline , NULL , DECL html_attrs, NULL, NULL
},
{ "col", 0, 2, 2, 1, 0, 0, 0, "table column ",
EMPTY , NULL , DECL col_attrs , NULL, NULL
},
{ "colgroup", 0, 1, 0, 0, 0, 0, 0, "table column group ",
DECL col_elt , "col" , DECL col_attrs , NULL, NULL
},
{ "dd", 0, 1, 0, 0, 0, 0, 0, "definition description ",
DECL html_flow , NULL , DECL html_attrs, NULL, NULL
},
{ "del", 0, 0, 0, 0, 0, 0, 2, "deleted text ",
DECL html_flow , NULL , DECL edit_attrs , NULL, NULL
},
{ "dfn", 0, 0, 0, 0, 0, 0, 1, "instance definition",
DECL html_inline , NULL , DECL html_attrs, NULL, NULL
},
{ "dir", 0, 0, 0, 0, 1, 1, 0, "directory list",
DECL blockli_elt, "li" , NULL, DECL compact_attrs, NULL
},
{ "div", 0, 0, 0, 0, 0, 0, 0, "generic language/style container",
DECL html_flow, NULL, DECL html_attrs, DECL align_attr, NULL
},
{ "dl", 0, 0, 0, 0, 0, 0, 0, "definition list ",
DECL dl_contents , "dd" , html_attrs, DECL compact_attr, NULL
},
{ "dt", 0, 1, 0, 0, 0, 0, 0, "definition term ",
DECL html_inline, NULL, DECL html_attrs, NULL, NULL
},
{ "em", 0, 3, 0, 0, 0, 0, 1, "emphasis",
DECL html_inline, NULL, DECL html_attrs, NULL, NULL
},
{ "fieldset", 0, 0, 0, 0, 0, 0, 0, "form control group ",
DECL fieldset_contents , NULL, DECL html_attrs, NULL, NULL
},
{ "font", 0, 3, 0, 0, 1, 1, 1, "local change to font ",
DECL html_inline, NULL, NULL, DECL font_attrs, NULL
},
{ "form", 0, 0, 0, 0, 0, 0, 0, "interactive form ",
DECL form_contents, "fieldset", DECL form_attrs , DECL target_attr, DECL action_attr
},
{ "frame", 0, 2, 2, 1, 0, 2, 0, "subwindow " ,
EMPTY, NULL, NULL, DECL frame_attrs, NULL
},
{ "frameset", 0, 0, 0, 0, 0, 2, 0, "window subdivision" ,
DECL frameset_contents, "noframes" , NULL , DECL frameset_attrs, NULL
},
{ "h1", 0, 0, 0, 0, 0, 0, 0, "heading ",
DECL html_inline, NULL, DECL html_attrs, DECL align_attr, NULL
},
{ "h2", 0, 0, 0, 0, 0, 0, 0, "heading ",
DECL html_inline, NULL, DECL html_attrs, DECL align_attr, NULL
},
{ "h3", 0, 0, 0, 0, 0, 0, 0, "heading ",
DECL html_inline, NULL, DECL html_attrs, DECL align_attr, NULL
},
{ "h4", 0, 0, 0, 0, 0, 0, 0, "heading ",
DECL html_inline, NULL, DECL html_attrs, DECL align_attr, NULL
},
{ "h5", 0, 0, 0, 0, 0, 0, 0, "heading ",
DECL html_inline, NULL, DECL html_attrs, DECL align_attr, NULL
},
{ "h6", 0, 0, 0, 0, 0, 0, 0, "heading ",
DECL html_inline, NULL, DECL html_attrs, DECL align_attr, NULL
},
{ "head", 1, 1, 0, 0, 0, 0, 0, "document head ",
DECL head_contents, NULL, DECL head_attrs, NULL, NULL
},
{ "hr", 0, 2, 2, 1, 0, 0, 0, "horizontal rule " ,
EMPTY, NULL, DECL html_attrs, DECL hr_depr, NULL
},
{ "html", 1, 1, 0, 0, 0, 0, 0, "document root element ",
DECL html_content , NULL , DECL i18n_attrs, DECL version_attr, NULL
},
{ "i", 0, 3, 0, 0, 0, 0, 1, "italic text style",
DECL html_inline, NULL, DECL html_attrs, NULL, NULL
},
{ "iframe", 0, 0, 0, 0, 0, 1, 2, "inline subwindow ",
DECL html_flow, NULL, NULL, DECL iframe_attrs, NULL
},
{ "img", 0, 2, 2, 1, 0, 0, 1, "embedded image ",
EMPTY, NULL, DECL img_attrs, DECL align_attr, src_alt_attrs
},
{ "input", 0, 2, 2, 1, 0, 0, 1, "form control ",
EMPTY, NULL, DECL input_attrs , DECL align_attr, NULL
},
{ "ins", 0, 0, 0, 0, 0, 0, 2, "inserted text",
DECL html_flow, NULL, DECL edit_attrs, NULL, NULL
},
{ "isindex", 0, 2, 2, 1, 1, 1, 0, "single line prompt ",
EMPTY, NULL, NULL, DECL prompt_attrs, NULL
},
{ "kbd", 0, 0, 0, 0, 0, 0, 1, "text to be entered by the user",
DECL html_inline, NULL, DECL html_attrs, NULL, NULL
},
{ "label", 0, 0, 0, 0, 0, 0, 1, "form field label text ",
DECL html_inline MODIFIER, NULL, DECL label_attrs , NULL, NULL
},
{ "legend", 0, 0, 0, 0, 0, 0, 0, "fieldset legend ",
DECL html_inline, NULL, DECL legend_attrs , DECL align_attr, NULL
},
{ "li", 0, 1, 1, 0, 0, 0, 0, "list item ",
DECL html_flow, NULL, DECL html_attrs, NULL, NULL
},
{ "link", 0, 2, 2, 1, 0, 0, 0, "a media-independent link ",
EMPTY, NULL, DECL link_attrs, DECL target_attr, NULL
},
{ "map", 0, 0, 0, 0, 0, 0, 2, "client-side image map ",
DECL map_contents , NULL, DECL html_attrs , NULL, name_attr
},
{ "menu", 0, 0, 0, 0, 1, 1, 0, "menu list ",
DECL blockli_elt , NULL, NULL, DECL compact_attrs, NULL
},
{ "meta", 0, 2, 2, 1, 0, 0, 0, "generic metainformation ",
EMPTY, NULL, DECL meta_attrs , NULL , DECL content_attr
},
{ "noframes", 0, 0, 0, 0, 0, 2, 0, "alternate content container for non frame-based rendering ",
DECL noframes_content, "body" , DECL html_attrs, NULL, NULL
},
{ "noscript", 0, 0, 0, 0, 0, 0, 0, "alternate content container for non script-based rendering ",
DECL html_flow, "div", DECL html_attrs, NULL, NULL
},
{ "object", 0, 0, 0, 0, 0, 0, 2, "generic embedded object ",
DECL object_contents , "div" , DECL object_attrs, DECL object_depr, NULL
},
{ "ol", 0, 0, 0, 0, 0, 0, 0, "ordered list ",
DECL li_elt , "li" , DECL html_attrs, DECL ol_attrs, NULL
},
{ "optgroup", 0, 0, 0, 0, 0, 0, 0, "option group ",
option_elt , "option", DECL optgroup_attrs, NULL, DECL label_attr
},
{ "option", 0, 1, 0, 0, 0, 0, 0, "selectable choice " ,
DECL html_pcdata, NULL, DECL option_attrs, NULL, NULL
},
{ "p", 0, 1, 0, 0, 0, 0, 0, "paragraph ",
DECL html_inline, NULL, DECL html_attrs, DECL align_attr, NULL
},
{ "param", 0, 2, 2, 1, 0, 0, 0, "named property value ",
EMPTY, NULL, DECL param_attrs, NULL, name_attr
},
{ "pre", 0, 0, 0, 0, 0, 0, 0, "preformatted text ",
DECL pre_content, NULL, DECL html_attrs, DECL width_attr, NULL
},
{ "q", 0, 0, 0, 0, 0, 0, 1, "short inline quotation ",
DECL html_inline, NULL, DECL quote_attrs, NULL, NULL
},
{ "s", 0, 3, 0, 0, 1, 1, 1, "strike-through text style",
DECL html_inline, NULL, NULL, DECL html_attrs, NULL
},
{ "samp", 0, 0, 0, 0, 0, 0, 1, "sample program output, scripts, etc.",
DECL html_inline, NULL, DECL html_attrs, NULL, NULL
},
{ "script", 0, 0, 0, 0, 0, 0, 2, "script statements ",
DECL html_cdata, NULL, DECL script_attrs, DECL language_attr, DECL type_attr
},
{ "select", 0, 0, 0, 0, 0, 0, 1, "option selector ",
DECL select_content, NULL, DECL select_attrs, NULL, NULL
},
{ "small", 0, 3, 0, 0, 0, 0, 1, "small text style",
DECL html_inline, NULL, DECL html_attrs, NULL, NULL
},
{ "span", 0, 0, 0, 0, 0, 0, 1, "generic language/style container ",
DECL html_inline, NULL, DECL html_attrs, NULL, NULL
},
{ "strike", 0, 3, 0, 0, 1, 1, 1, "strike-through text",
DECL html_inline, NULL, NULL, DECL html_attrs, NULL
},
{ "strong", 0, 3, 0, 0, 0, 0, 1, "strong emphasis",
DECL html_inline, NULL, DECL html_attrs, NULL, NULL
},
{ "style", 0, 0, 0, 0, 0, 0, 0, "style info ",
DECL html_cdata, NULL, DECL style_attrs, NULL, DECL type_attr
},
{ "sub", 0, 3, 0, 0, 0, 0, 1, "subscript",
DECL html_inline, NULL, DECL html_attrs, NULL, NULL
},
{ "sup", 0, 3, 0, 0, 0, 0, 1, "superscript ",
DECL html_inline, NULL, DECL html_attrs, NULL, NULL
},
{ "table", 0, 0, 0, 0, 0, 0, 0, "",
DECL table_contents , "tr" , DECL table_attrs , DECL table_depr, NULL
},
{ "tbody", 1, 0, 0, 0, 0, 0, 0, "table body ",
DECL tr_elt , "tr" , DECL talign_attrs, NULL, NULL
},
{ "td", 0, 0, 0, 0, 0, 0, 0, "table data cell",
DECL html_flow, NULL, DECL th_td_attr, DECL th_td_depr, NULL
},
{ "textarea", 0, 0, 0, 0, 0, 0, 1, "multi-line text field ",
DECL html_pcdata, NULL, DECL textarea_attrs, NULL, DECL rows_cols_attr
},
{ "tfoot", 0, 1, 0, 0, 0, 0, 0, "table footer ",
DECL tr_elt , "tr" , DECL talign_attrs, NULL, NULL
},
{ "th", 0, 1, 0, 0, 0, 0, 0, "table header cell",
DECL html_flow, NULL, DECL th_td_attr, DECL th_td_depr, NULL
},
{ "thead", 0, 1, 0, 0, 0, 0, 0, "table header ",
DECL tr_elt , "tr" , DECL talign_attrs, NULL, NULL
},
{ "title", 0, 0, 0, 0, 0, 0, 0, "document title ",
DECL html_pcdata, NULL, DECL i18n_attrs, NULL, NULL
},
{ "tr", 0, 0, 0, 0, 0, 0, 0, "table row ",
DECL tr_contents , "td" , DECL talign_attrs, DECL bgcolor_attr, NULL
},
{ "tt", 0, 3, 0, 0, 0, 0, 1, "teletype or monospaced text style",
DECL html_inline, NULL, DECL html_attrs, NULL, NULL
},
{ "u", 0, 3, 0, 0, 1, 1, 1, "underlined text style",
DECL html_inline, NULL, NULL, DECL html_attrs, NULL
},
{ "ul", 0, 0, 0, 0, 0, 0, 0, "unordered list ",
DECL li_elt , "li" , DECL html_attrs, DECL ul_depr, NULL
},
{ "var", 0, 0, 0, 0, 0, 0, 1, "instance of a variable or program argument",
DECL html_inline, NULL, DECL html_attrs, NULL, NULL
}
};
/*
* start tags that imply the end of current element
*/
static const char *htmlStartClose[] = {
"form", "form", "p", "hr", "h1", "h2", "h3", "h4", "h5", "h6",
"dl", "ul", "ol", "menu", "dir", "address", "pre",
"listing", "xmp", "head", NULL,
"head", "p", NULL,
"title", "p", NULL,
"body", "head", "style", "link", "title", "p", NULL,
"frameset", "head", "style", "link", "title", "p", NULL,
"li", "p", "h1", "h2", "h3", "h4", "h5", "h6", "dl", "address",
"pre", "listing", "xmp", "head", "li", NULL,
"hr", "p", "head", NULL,
"h1", "p", "head", NULL,
"h2", "p", "head", NULL,
"h3", "p", "head", NULL,
"h4", "p", "head", NULL,
"h5", "p", "head", NULL,
"h6", "p", "head", NULL,
"dir", "p", "head", NULL,
"address", "p", "head", "ul", NULL,
"pre", "p", "head", "ul", NULL,
"listing", "p", "head", NULL,
"xmp", "p", "head", NULL,
"blockquote", "p", "head", NULL,
"dl", "p", "dt", "menu", "dir", "address", "pre", "listing",
"xmp", "head", NULL,
"dt", "p", "menu", "dir", "address", "pre", "listing", "xmp",
"head", "dd", NULL,
"dd", "p", "menu", "dir", "address", "pre", "listing", "xmp",
"head", "dt", NULL,
"ul", "p", "head", "ol", "menu", "dir", "address", "pre",
"listing", "xmp", NULL,
"ol", "p", "head", "ul", NULL,
"menu", "p", "head", "ul", NULL,
"p", "p", "head", "h1", "h2", "h3", "h4", "h5", "h6", NULL,
"div", "p", "head", NULL,
"noscript", "p", "head", NULL,
"center", "font", "b", "i", "p", "head", NULL,
"a", "a", NULL,
"caption", "p", NULL,
"colgroup", "caption", "colgroup", "col", "p", NULL,
"col", "caption", "col", "p", NULL,
"table", "p", "head", "h1", "h2", "h3", "h4", "h5", "h6", "pre",
"listing", "xmp", "a", NULL,
"th", "th", "td", "p", "span", "font", "a", "b", "i", "u", NULL,
"td", "th", "td", "p", "span", "font", "a", "b", "i", "u", NULL,
"tr", "th", "td", "tr", "caption", "col", "colgroup", "p", NULL,
"thead", "caption", "col", "colgroup", NULL,
"tfoot", "th", "td", "tr", "caption", "col", "colgroup", "thead",
"tbody", "p", NULL,
"tbody", "th", "td", "tr", "caption", "col", "colgroup", "thead",
"tfoot", "tbody", "p", NULL,
"optgroup", "option", NULL,
"option", "option", NULL,
"fieldset", "legend", "p", "head", "h1", "h2", "h3", "h4", "h5", "h6",
"pre", "listing", "xmp", "a", NULL,
NULL
};
/*
* The list of HTML elements which are supposed not to have
* CDATA content and where a p element will be implied
*
* TODO: extend that list by reading the HTML SGML DTD on
* implied paragraph
*/
static const char *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 *htmlScriptAttributes[] = {
"onclick",
"ondblclick",
"onmousedown",
"onmouseup",
"onmouseover",
"onmousemove",
"onmouseout",
"onkeypress",
"onkeydown",
"onkeyup",
"onload",
"onunload",
"onfocus",
"onblur",
"onsubmit",
"onrest",
"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 */
};
static const char** htmlStartCloseIndex[100];
static int htmlStartCloseIndexinitialized = 0;
/************************************************************************
* *
* functions to handle HTML specific data *
* *
************************************************************************/
/**
* htmlInitAutoClose:
*
* Initialize the htmlStartCloseIndex for fast lookup of closing tags names.
* This is not reentrant. Call xmlInitParser() once before processing in
* case of use in multithreaded programs.
*/
void
htmlInitAutoClose(void) {
int indx, i = 0;
if (htmlStartCloseIndexinitialized) return;
for (indx = 0;indx < 100;indx ++) htmlStartCloseIndex[indx] = NULL;
indx = 0;
while ((htmlStartClose[i] != NULL) && (indx < 100 - 1)) {
htmlStartCloseIndex[indx++] = &htmlStartClose[i];
while (htmlStartClose[i] != NULL) i++;
i++;
}
htmlStartCloseIndexinitialized = 1;
}
/**
* 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) {
unsigned int i;
for (i = 0; i < (sizeof(html40ElementTable) /
sizeof(html40ElementTable[0]));i++) {
if (!xmlStrcasecmp(tag, BAD_CAST html40ElementTable[i].name))
return((htmlElemDescPtr) &html40ElementTable[i]);
}
return(NULL);
}
/**
* 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);
}
/**
* 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.
* Initialize the htmlStartCloseIndex for fast lookup of closing tags names.
*
* Returns 0 if no, 1 if yes.
*/
static int
htmlCheckAutoClose(const xmlChar * newtag, const xmlChar * oldtag)
{
int i, indx;
const char **closed = NULL;
if (htmlStartCloseIndexinitialized == 0)
htmlInitAutoClose();
/* inefficient, but not a big deal */
for (indx = 0; indx < 100; indx++) {
closed = htmlStartCloseIndex[indx];
if (closed == NULL)
return (0);
if (xmlStrEqual(BAD_CAST * closed, newtag))
break;
}
i = closed - htmlStartClose;
i++;
while (htmlStartClose[i] != NULL) {
if (xmlStrEqual(BAD_CAST htmlStartClose[i], oldtag)) {
return (1);
}
i++;
}
return (0);
}
/**
* 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;
priority = htmlGetEndPriority(newtag);
for (i = (ctxt->nameNr - 1); i >= 0; i--) {
if (xmlStrEqual(newtag, ctxt->nameTab[i]))
break;
/*
* A missplaced 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);
}
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->nameNr == 0)
return;
for (i = (ctxt->nameNr - 1); i >= 0; i--) {
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)
{
while ((newtag != NULL) && (ctxt->name != NULL) &&
(htmlCheckAutoClose(newtag, ctxt->name))) {
if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL))
ctxt->sax->endElement(ctxt->userData, ctxt->name);
htmlnamePop(ctxt);
}
if (newtag == NULL) {
htmlAutoCloseOnEnd(ctxt);
return;
}
while ((newtag == NULL) && (ctxt->name != NULL) &&
((xmlStrEqual(ctxt->name, BAD_CAST "head")) ||
(xmlStrEqual(ctxt->name, BAD_CAST "body")) ||
(xmlStrEqual(ctxt->name, BAD_CAST "html")))) {
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
*
* 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
*
* 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) {
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")))) {
/*
* 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"))) {
int i;
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);
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 *
* *
************************************************************************/
/*
* Macro used to grow the current buffer.
*/
#define growBuffer(buffer) { \
xmlChar *tmp; \
buffer##_size *= 2; \
tmp = (xmlChar *) xmlRealloc(buffer, buffer##_size * sizeof(xmlChar)); \
if (tmp == NULL) { \
htmlErrMemory(ctxt, "growing buffer\n"); \
xmlFree(buffer); \
return(NULL); \
} \
buffer = tmp; \
}
/**
* 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);
}
/**
* 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) {
unsigned int i;
for (i = 0;i < (sizeof(html40EntitiesTable)/
sizeof(html40EntitiesTable[0]));i++) {
if (html40EntitiesTable[i].value >= value) {
if (html40EntitiesTable[i].value > value)
break;
return((htmlEntityDescPtr) &html40EntitiesTable[i]);
}
}
return(NULL);
}
/**
* UTF8ToHtml:
* @out: a pointer to an array of bytes to store the result
* @outlen: the length of @out
* @in: a pointer to an array of UTF-8 chars
* @inlen: the length of @in
*
* Take a block of UTF-8 chars in and try to convert it to an ASCII
* plus HTML entities block of chars out.
*
* Returns 0 if success, -2 if the transcoding fails, or -1 otherwise
* The value of @inlen after return is the number of octets consumed
* as the return value is positive, else 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* 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)) return(-1);
if (in == NULL) {
/*
* initialization nothing to do
*/
*outlen = 0;
*inlen = 0;
return(0);
}
inend = in + (*inlen);
outend = out + (*outlen);
while (in < inend) {
d = *in++;
if (d < 0x80) { c= d; trailing= 0; }
else if (d < 0xC0) {
/* trailing byte in leading position */
*outlen = out - outstart;
*inlen = processed - instart;
return(-2);
} else if (d < 0xE0) { c= d & 0x1F; trailing= 1; }
else if (d < 0xF0) { c= d & 0x0F; trailing= 2; }
else if (d < 0xF8) { c= d & 0x07; trailing= 3; }
else {
/* no chance for this in Ascii */
*outlen = out - outstart;
*inlen = processed - instart;
return(-2);
}
if (inend - in < trailing) {
break;
}
for ( ; trailing; trailing--) {
if ((in >= inend) || (((d= *in++) & 0xC0) != 0x80))
break;
c <<= 6;
c |= d & 0x3F;
}
/* assertion: c is a single UTF-4 value */
if (c < 0x80) {
if (out + 1 >= outend)
break;
*out++ = c;
} else {
int len;
const htmlEntityDesc * ent;
/*
* Try to lookup a predefined HTML entity for it
*/
ent = htmlEntityValueLookup(c);
if (ent == NULL) {
/* no chance for this in Ascii */
*outlen = out - outstart;
*inlen = processed - instart;
return(-2);
}
len = strlen(ent->name);
if (out + 2 + len >= outend)
break;
*out++ = '&';
memcpy(out, ent->name, len);
out += len;
*out++ = ';';
}
processed = in;
}
*outlen = out - outstart;
*inlen = processed - instart;
return(0);
}
/**
* 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 (out + 2 + len > outend)
break;
*out++ = '&';
memcpy(out, cp, len);
out += len;
*out++ = ';';
}
processed = in;
}
*outlen = out - outstart;
*inlen = processed - instart;
return(0);
}
/************************************************************************
* *
* Commodity functions to handle streams *
* *
************************************************************************/
/**
* htmlNewInputStream:
* @ctxt: an HTML parser context
*
* Create a new input stream structure
* Returns the new input stream or NULL
*/
static htmlParserInputPtr
htmlNewInputStream(htmlParserCtxtPtr ctxt) {
htmlParserInputPtr input;
input = (xmlParserInputPtr) xmlMalloc(sizeof(htmlParserInput));
if (input == NULL) {
htmlErrMemory(ctxt, "couldn't allocate a new input stream\n");
return(NULL);
}
memset(input, 0, sizeof(htmlParserInput));
input->filename = NULL;
input->directory = NULL;
input->base = NULL;
input->cur = NULL;
input->buf = NULL;
input->line = 1;
input->col = 1;
input->buf = NULL;
input->free = NULL;
input->version = NULL;
input->consumed = 0;
input->length = 0;
return(input);
}
/************************************************************************
* *
* Commodity functions, cleanup needed ? *
* *
************************************************************************/
/*
* all tags allowing pc data from the html 4.01 loose dtd
* NOTE: it might be more apropriate to integrate this information
* into the html40ElementTable array but I don't want to risk any
* binary incomptibility
*/
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 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_BLANK_CH(str[j]))) return(0);
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) {
htmlErrMemory(NULL, "HTML document creation failed\n");
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;
if ((ExternalID != NULL) ||
(URI != NULL))
xmlCreateIntSubset(cur, BAD_CAST "html", ExternalID, URI);
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 *
* *
************************************************************************/
static const xmlChar * htmlParseNameComplex(xmlParserCtxtPtr ctxt);
/**
* 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 const xmlChar *
htmlParseHTMLName(htmlParserCtxtPtr ctxt) {
int i = 0;
xmlChar loc[HTML_PARSER_BUFFER_SIZE];
if (!IS_ASCII_LETTER(CUR) && (CUR != '_') &&
(CUR != ':')) return(NULL);
while ((i < HTML_PARSER_BUFFER_SIZE) &&
((IS_ASCII_LETTER(CUR)) || (IS_ASCII_DIGIT(CUR)) ||
(CUR == ':') || (CUR == '-') || (CUR == '_'))) {
if ((CUR >= 'A') && (CUR <= 'Z')) loc[i] = CUR + 0x20;
else loc[i] = CUR;
i++;
NEXT;
}
return(xmlDictLookup(ctxt->dict, loc, i));
}
/**
* htmlParseName:
* @ctxt: an HTML parser context
*
* parse an HTML name, this routine is case sensitive.
*
* Returns the Name parsed or NULL
*/
static const xmlChar *
htmlParseName(htmlParserCtxtPtr ctxt) {
const xmlChar *in;
const xmlChar *ret;
int count = 0;
GROW;
/*
* Accelerator for simple ASCII names
*/
in = ctxt->input->cur;
if (((*in >= 0x61) && (*in <= 0x7A)) ||
((*in >= 0x41) && (*in <= 0x5A)) ||
(*in == '_') || (*in == ':')) {
in++;
while (((*in >= 0x61) && (*in <= 0x7A)) ||
((*in >= 0x41) && (*in <= 0x5A)) ||
((*in >= 0x30) && (*in <= 0x39)) ||
(*in == '_') || (*in == '-') ||
(*in == ':') || (*in == '.'))
in++;
if ((*in > 0) && (*in < 0x80)) {
count = in - ctxt->input->cur;
ret = xmlDictLookup(ctxt->dict, ctxt->input->cur, count);
ctxt->input->cur = in;
ctxt->nbChars += count;
ctxt->input->col += count;
return(ret);
}
}
return(htmlParseNameComplex(ctxt));
}
static const xmlChar *
htmlParseNameComplex(xmlParserCtxtPtr ctxt) {
int len = 0, l;
int c;
int count = 0;
/*
* Handler for more complex cases
*/
GROW;
c = CUR_CHAR(l);
if ((c == ' ') || (c == '>') || (c == '/') || /* accelerators */
(!IS_LETTER(c) && (c != '_') &&
(c != ':'))) {
return(NULL);
}
while ((c != ' ') && (c != '>') && (c != '/') && /* test bigname.xml */
((IS_LETTER(c)) || (IS_DIGIT(c)) ||
(c == '.') || (c == '-') ||
(c == '_') || (c == ':') ||
(IS_COMBINING(c)) ||
(IS_EXTENDER(c)))) {
if (count++ > 100) {
count = 0;
GROW;
}
len += l;
NEXTL(l);
c = CUR_CHAR(l);
}
return(xmlDictLookup(ctxt->dict, ctxt->input->cur - len, len));
}
/**
* htmlParseHTMLAttribute:
* @ctxt: an HTML parser context
* @stop: a char stop value
*
* parse an HTML attribute value till the stop (quote), if
* stop is 0 then it stops at the first space
*
* Returns the attribute parsed or NULL
*/
static xmlChar *
htmlParseHTMLAttribute(htmlParserCtxtPtr ctxt, const xmlChar stop) {
xmlChar *buffer = NULL;
int buffer_size = 0;
xmlChar *out = NULL;
const xmlChar *name = NULL;
const xmlChar *cur = NULL;
const htmlEntityDesc * ent;
/*
* allocate a translation buffer.
*/
buffer_size = HTML_PARSER_BUFFER_SIZE;
buffer = (xmlChar *) xmlMallocAtomic(buffer_size * sizeof(xmlChar));
if (buffer == NULL) {
htmlErrMemory(ctxt, "buffer allocation failed\n");
return(NULL);
}
out = buffer;
/*
* Ok loop until we reach one of the ending chars
*/
while ((CUR != 0) && (CUR != stop)) {
if ((stop == 0) && (CUR == '>')) break;
if ((stop == 0) && (IS_BLANK_CH(CUR))) break;
if (CUR == '&') {
if (NXT(1) == '#') {
unsigned int c;
int bits;
c = htmlParseCharRef(ctxt);
if (c < 0x80)
{ *out++ = c; bits= -6; }
else if (c < 0x800)
{ *out++ =((c >> 6) & 0x1F) | 0xC0; bits= 0; }
else if (c < 0x10000)
{ *out++ =((c >> 12) & 0x0F) | 0xE0; bits= 6; }
else
{ *out++ =((c >> 18) & 0x07) | 0xF0; bits= 12; }
for ( ; bits >= 0; bits-= 6) {
*out++ = ((c >> bits) & 0x3F) | 0x80;
}
if (out - buffer > buffer_size - 100) {
int indx = out - buffer;
growBuffer(buffer);
out = &buffer[indx];
}
} else {
ent = htmlParseEntityRef(ctxt, &name);
if (name == NULL) {
*out++ = '&';
if (out - buffer > buffer_size - 100) {
int indx = out - buffer;
growBuffer(buffer);
out = &buffer[indx];
}
} else if (ent == NULL) {
*out++ = '&';
cur = name;
while (*cur != 0) {
if (out - buffer > buffer_size - 100) {
int indx = out - buffer;
growBuffer(buffer);
out = &buffer[indx];
}
*out++ = *cur++;
}
} else {
unsigned int c;
int bits;
if (out - buffer > buffer_size - 100) {
int indx = out - buffer;
growBuffer(buffer);
out = &buffer[indx];
}
c = (xmlChar)ent->value;
if (c < 0x80)
{ *out++ = c; bits= -6; }
else if (c < 0x800)
{ *out++ =((c >> 6) & 0x1F) | 0xC0; bits= 0; }
else if (c < 0x10000)
{ *out++ =((c >> 12) & 0x0F) | 0xE0; bits= 6; }
else
{ *out++ =((c >> 18) & 0x07) | 0xF0; bits= 12; }
for ( ; bits >= 0; bits-= 6) {
*out++ = ((c >> bits) & 0x3F) | 0x80;
}
}
}
} else {
unsigned int c;
int bits, l;
if (out - buffer > buffer_size - 100) {
int indx = out - buffer;
growBuffer(buffer);
out = &buffer[indx];
}
c = CUR_CHAR(l);
if (c < 0x80)
{ *out++ = c; bits= -6; }
else if (c < 0x800)
{ *out++ =((c >> 6) & 0x1F) | 0xC0; bits= 0; }
else if (c < 0x10000)
{ *out++ =((c >> 12) & 0x0F) | 0xE0; bits= 6; }
else
{ *out++ =((c >> 18) & 0x07) | 0xF0; bits= 12; }
for ( ; bits >= 0; bits-= 6) {
*out++ = ((c >> bits) & 0x3F) | 0x80;
}
NEXT;
}
}
*out++ = 0;
return(buffer);
}
/**
* htmlParseEntityRef:
* @ctxt: an HTML parser context
* @str: location to store the entity name
*
* parse an HTML ENTITY references
*
* [68] EntityRef ::= '&' Name ';'
*
* Returns the associated htmlEntityDescPtr if found, or NULL otherwise,
* if non-NULL *str will have to be freed by the caller.
*/
const htmlEntityDesc *
htmlParseEntityRef(htmlParserCtxtPtr ctxt, const xmlChar **str) {
const xmlChar *name;
const htmlEntityDesc * ent = NULL;
if (str != NULL) *str = NULL;
if ((ctxt == NULL) || (ctxt->input == NULL)) return(NULL);
if (CUR == '&') {
NEXT;
name = htmlParseName(ctxt);
if (name == NULL) {
htmlParseErr(ctxt, XML_ERR_NAME_REQUIRED,
"htmlParseEntityRef: no name\n", NULL, NULL);
} else {
GROW;
if (CUR == ';') {
if (str != NULL)
*str = name;
/*
* Lookup the entity in the table.
*/
ent = htmlEntityLookup(name);
if (ent != NULL) /* OK that's ugly !!! */
NEXT;
} else {
htmlParseErr(ctxt, XML_ERR_ENTITYREF_SEMICOL_MISSING,
"htmlParseEntityRef: expecting ';'\n",
NULL, NULL);
if (str != NULL)
*str = name;
}
}
}
return(ent);
}
/**
* htmlParseAttValue:
* @ctxt: an HTML parser context
*
* parse a value for an attribute
* Note: the parser won't do substitution of entities here, this
* will be handled later in xmlStringGetNodeList, unless it was
* asked for ctxt->replaceEntities != 0
*
* Returns the AttValue parsed or NULL.
*/
static xmlChar *
htmlParseAttValue(htmlParserCtxtPtr ctxt) {
xmlChar *ret = NULL;
if (CUR == '"') {
NEXT;
ret = htmlParseHTMLAttribute(ctxt, '"');
if (CUR != '"') {
htmlParseErr(ctxt, XML_ERR_ATTRIBUTE_NOT_FINISHED,
"AttValue: \" expected\n", NULL, NULL);
} else
NEXT;
} else if (CUR == '\'') {
NEXT;
ret = htmlParseHTMLAttribute(ctxt, '\'');
if (CUR != '\'') {
htmlParseErr(ctxt, XML_ERR_ATTRIBUTE_NOT_FINISHED,
"AttValue: ' expected\n", NULL, NULL);
} else
NEXT;
} else {
/*
* That's an HTMLism, the attribute value may not be quoted
*/
ret = htmlParseHTMLAttribute(ctxt, 0);
if (ret == NULL) {
htmlParseErr(ctxt, XML_ERR_ATTRIBUTE_WITHOUT_VALUE,
"AttValue: no value found\n", NULL, NULL);
}
}
return(ret);
}
/**
* htmlParseSystemLiteral:
* @ctxt: an HTML parser context
*
* parse an HTML Literal
*
* [11] SystemLiteral ::= ('"' [^"]* '"') | ("'" [^']* "'")
*
* Returns the SystemLiteral parsed or NULL
*/
static xmlChar *
htmlParseSystemLiteral(htmlParserCtxtPtr ctxt) {
const xmlChar *q;
xmlChar *ret = NULL;
if (CUR == '"') {
NEXT;
q = CUR_PTR;
while ((IS_CHAR_CH(CUR)) && (CUR != '"'))
NEXT;
if (!IS_CHAR_CH(CUR)) {
htmlParseErr(ctxt, XML_ERR_LITERAL_NOT_FINISHED,
"Unfinished SystemLiteral\n", NULL, NULL);
} else {
ret = xmlStrndup(q, CUR_PTR - q);
NEXT;
}
} else if (CUR == '\'') {
NEXT;
q = CUR_PTR;
while ((IS_CHAR_CH(CUR)) && (CUR != '\''))
NEXT;
if (!IS_CHAR_CH(CUR)) {
htmlParseErr(ctxt, XML_ERR_LITERAL_NOT_FINISHED,
"Unfinished SystemLiteral\n", NULL, NULL);
} else {
ret = xmlStrndup(q, CUR_PTR - q);
NEXT;
}
} else {
htmlParseErr(ctxt, XML_ERR_LITERAL_NOT_STARTED,
" or ' expected\n", NULL, NULL);
}
return(ret);
}
/**
* htmlParsePubidLiteral:
* @ctxt: an HTML parser context
*
* parse an HTML public literal
*
* [12] PubidLiteral ::= '"' PubidChar* '"' | "'" (PubidChar - "'")* "'"
*
* Returns the PubidLiteral parsed or NULL.
*/
static xmlChar *
htmlParsePubidLiteral(htmlParserCtxtPtr ctxt) {
const xmlChar *q;
xmlChar *ret = NULL;
/*
* Name ::= (Letter | '_') (NameChar)*
*/
if (CUR == '"') {
NEXT;
q = CUR_PTR;
while (IS_PUBIDCHAR_CH(CUR)) NEXT;
if (CUR != '"') {
htmlParseErr(ctxt, XML_ERR_LITERAL_NOT_FINISHED,
"Unfinished PubidLiteral\n", NULL, NULL);
} else {
ret = xmlStrndup(q, CUR_PTR - q);
NEXT;
}
} else if (CUR == '\'') {
NEXT;
q = CUR_PTR;
while ((IS_PUBIDCHAR_CH(CUR)) && (CUR != '\''))
NEXT;
if (CUR != '\'') {
htmlParseErr(ctxt, XML_ERR_LITERAL_NOT_FINISHED,
"Unfinished PubidLiteral\n", NULL, NULL);
} else {
ret = xmlStrndup(q, CUR_PTR - q);
NEXT;
}
} else {
htmlParseErr(ctxt, XML_ERR_LITERAL_NOT_STARTED,
"PubidLiteral \" or ' expected\n", NULL, NULL);
}
return(ret);
}
/**
* htmlParseScript:
* @ctxt: an HTML parser context
*
* parse the content of an HTML SCRIPT or STYLE element
* http://www.w3.org/TR/html4/sgml/dtd.html#Script
* http://www.w3.org/TR/html4/sgml/dtd.html#StyleSheet
* http://www.w3.org/TR/html4/types.html#type-script
* http://www.w3.org/TR/html4/types.html#h-6.15
* http://www.w3.org/TR/html4/appendix/notes.html#h-B.3.2.1
*
* Script data ( %Script; in the DTD) can be the content of the SCRIPT
* element and the value of intrinsic event attributes. User agents must
* not evaluate script data as HTML markup but instead must pass it on as
* data to a script engine.
* NOTES:
* - The content is passed like CDATA
* - the attributes for style and scripting "onXXX" are also described
* as CDATA but SGML allows entities references in attributes so their
* processing is identical as other attributes
*/
static void
htmlParseScript(htmlParserCtxtPtr ctxt) {
xmlChar buf[HTML_PARSER_BIG_BUFFER_SIZE + 5];
int nbchar = 0;
int cur,l;
SHRINK;
cur = CUR_CHAR(l);
while (IS_CHAR_CH(cur)) {
if ((cur == '<') && (NXT(1) == '!') && (NXT(2) == '-') &&
(NXT(3) == '-')) {
if ((nbchar != 0) && (ctxt->sax != NULL) && (!ctxt->disableSAX)) {
if (ctxt->sax->cdataBlock!= NULL) {
/*
* Insert as CDATA, which is the same as HTML_PRESERVE_NODE
*/
ctxt->sax->cdataBlock(ctxt->userData, buf, nbchar);
} else if (ctxt->sax->characters != NULL) {
ctxt->sax->characters(ctxt->userData, buf, nbchar);
}
}
nbchar = 0;
htmlParseComment(ctxt);
cur = CUR_CHAR(l);
continue;
} else if ((cur == '<') && (NXT(1) == '/')) {
/*
* One should break here, the specification is clear:
* Authors should therefore escape "</" within the content.
* Escape mechanisms are specific to each scripting or
* style sheet language.
*
* In recovery mode, only break if end tag match the
* current tag, effectively ignoring all tags inside the
* script/style block and treating the entire block as
* CDATA.
*/
if (ctxt->recovery) {
if (xmlStrncasecmp(ctxt->name, ctxt->input->cur+2,
xmlStrlen(ctxt->name)) == 0)
{
break; /* while */
} else {
htmlParseErr(ctxt, XML_ERR_TAG_NAME_MISMATCH,
"Element %s embeds close tag\n",
ctxt->name, NULL);
}
} else {
if (((NXT(2) >= 'A') && (NXT(2) <= 'Z')) ||
((NXT(2) >= 'a') && (NXT(2) <= 'z')))
{
break; /* while */
}
}
}
COPY_BUF(l,buf,nbchar,cur);
if (nbchar >= HTML_PARSER_BIG_BUFFER_SIZE) {
if (ctxt->sax->cdataBlock!= NULL) {
/*
* Insert as CDATA, which is the same as HTML_PRESERVE_NODE
*/
ctxt->sax->cdataBlock(ctxt->userData, buf, nbchar);
} else if (ctxt->sax->characters != NULL) {
ctxt->sax->characters(ctxt->userData, buf, nbchar);
}
nbchar = 0;
}
GROW;
NEXTL(l);
cur = CUR_CHAR(l);
}
if (!(IS_CHAR_CH(cur))) {
htmlParseErrInt(ctxt, XML_ERR_INVALID_CHAR,
"Invalid char in CDATA 0x%X\n", cur);
NEXT;
}
if ((nbchar != 0) && (ctxt->sax != NULL) && (!ctxt->disableSAX)) {
if (ctxt->sax->cdataBlock!= NULL) {
/*
* Insert as CDATA, which is the same as HTML_PRESERVE_NODE
*/
ctxt->sax->cdataBlock(ctxt->userData, buf, nbchar);
} else if (ctxt->sax->characters != NULL) {
ctxt->sax->characters(ctxt->userData, buf, nbchar);
}
}
}
/**
* htmlParseCharData:
* @ctxt: an HTML parser context
*
* parse a CharData section.
* if we are within a CDATA section ']]>' marks an end of section.
*
* [14] CharData ::= [^<&]* - ([^<&]* ']]>' [^<&]*)
*/
static void
htmlParseCharData(htmlParserCtxtPtr ctxt) {
xmlChar buf[HTML_PARSER_BIG_BUFFER_SIZE + 5];
int nbchar = 0;
int cur, l;
SHRINK;
cur = CUR_CHAR(l);
while (((cur != '<') || (ctxt->token == '<')) &&
((cur != '&') || (ctxt->token == '&')) &&
(IS_CHAR(cur))) {
COPY_BUF(l,buf,nbchar,cur);
if (nbchar >= HTML_PARSER_BIG_BUFFER_SIZE) {
/*
* Ok the segment is to be consumed as chars.
*/
if ((ctxt->sax != NULL) && (!ctxt->disableSAX)) {
if (areBlanks(ctxt, buf, nbchar)) {
if (ctxt->sax->ignorableWhitespace != NULL)
ctxt->sax->ignorableWhitespace(ctxt->userData,
buf, nbchar);
} else {
htmlCheckParagraph(ctxt);
if (ctxt->sax->characters != NULL)
ctxt->sax->characters(ctxt->userData, buf, nbchar);
}
}
nbchar = 0;
}
NEXTL(l);
cur = CUR_CHAR(l);
if (cur == 0) {
SHRINK;
GROW;
cur = CUR_CHAR(l);
}
}
if (nbchar != 0) {
buf[nbchar] = 0;
/*
* Ok the segment is to be consumed as chars.
*/
if ((ctxt->sax != NULL) && (!ctxt->disableSAX)) {
if (areBlanks(ctxt, buf, nbchar)) {
if (ctxt->sax->ignorableWhitespace != NULL)
ctxt->sax->ignorableWhitespace(ctxt->userData, buf, nbchar);
} else {
htmlCheckParagraph(ctxt);
if (ctxt->sax->characters != NULL)
ctxt->sax->characters(ctxt->userData, buf, nbchar);
}
}
} else {
/*
* Loop detection
*/
if (cur == 0)
ctxt->instate = XML_PARSER_EOF;
}
}
/**
* htmlParseExternalID:
* @ctxt: an HTML parser context
* @publicID: a xmlChar** receiving PubidLiteral
*
* Parse an External ID or a Public ID
*
* [75] ExternalID ::= 'SYSTEM' S SystemLiteral
* | 'PUBLIC' S PubidLiteral S SystemLiteral
*
* [83] PublicID ::= 'PUBLIC' S PubidLiteral
*
* Returns the function returns SystemLiteral and in the second
* case publicID receives PubidLiteral, is strict is off
* it is possible to return NULL and have publicID set.
*/
static xmlChar *
htmlParseExternalID(htmlParserCtxtPtr ctxt, xmlChar **publicID) {
xmlChar *URI = NULL;
if ((UPPER == 'S') && (UPP(1) == 'Y') &&
(UPP(2) == 'S') && (UPP(3) == 'T') &&
(UPP(4) == 'E') && (UPP(5) == 'M')) {
SKIP(6);
if (!IS_BLANK_CH(CUR)) {
htmlParseErr(ctxt, XML_ERR_SPACE_REQUIRED,
"Space required after 'SYSTEM'\n", NULL, NULL);
}
SKIP_BLANKS;
URI = htmlParseSystemLiteral(ctxt);
if (URI == NULL) {
htmlParseErr(ctxt, XML_ERR_URI_REQUIRED,
"htmlParseExternalID: SYSTEM, no URI\n", NULL, NULL);
}
} else if ((UPPER == 'P') && (UPP(1) == 'U') &&
(UPP(2) == 'B') && (UPP(3) == 'L') &&
(UPP(4) == 'I') && (UPP(5) == 'C')) {
SKIP(6);
if (!IS_BLANK_CH(CUR)) {
htmlParseErr(ctxt, XML_ERR_SPACE_REQUIRED,
"Space required after 'PUBLIC'\n", NULL, NULL);
}
SKIP_BLANKS;
*publicID = htmlParsePubidLiteral(ctxt);
if (*publicID == NULL) {
htmlParseErr(ctxt, XML_ERR_PUBID_REQUIRED,
"htmlParseExternalID: PUBLIC, no Public Identifier\n",
NULL, NULL);
}
SKIP_BLANKS;
if ((CUR == '"') || (CUR == '\'')) {
URI = htmlParseSystemLiteral(ctxt);
}
}
return(URI);
}
/**
* xmlParsePI:
* @ctxt: an XML parser context
*
* parse an XML Processing Instruction.
*
* [16] PI ::= '<?' PITarget (S (Char* - (Char* '?>' Char*)))? '?>'
*/
static void
htmlParsePI(htmlParserCtxtPtr ctxt) {
xmlChar *buf = NULL;
int len = 0;
int size = HTML_PARSER_BUFFER_SIZE;
int cur, l;
const xmlChar *target;
xmlParserInputState state;
int count = 0;
if ((RAW == '<') && (NXT(1) == '?')) {
state = ctxt->instate;
ctxt->instate = XML_PARSER_PI;
/*
* this is a Processing Instruction.
*/
SKIP(2);
SHRINK;
/*
* Parse the target name and check for special support like
* namespace.
*/
target = htmlParseName(ctxt);
if (target != NULL) {
if (RAW == '>') {
SKIP(1);
/*
* SAX: PI detected.
*/
if ((ctxt->sax) && (!ctxt->disableSAX) &&
(ctxt->sax->processingInstruction != NULL))
ctxt->sax->processingInstruction(ctxt->userData,
target, NULL);
ctxt->instate = state;
return;
}
buf = (xmlChar *) xmlMallocAtomic(size * sizeof(xmlChar));
if (buf == NULL) {
htmlErrMemory(ctxt, NULL);
ctxt->instate = state;
return;
}
cur = CUR;
if (!IS_BLANK(cur)) {
htmlParseErr(ctxt, XML_ERR_SPACE_REQUIRED,
"ParsePI: PI %s space expected\n", target, NULL);
}
SKIP_BLANKS;
cur = CUR_CHAR(l);
while (IS_CHAR(cur) && (cur != '>')) {
if (len + 5 >= size) {
xmlChar *tmp;
size *= 2;
tmp = (xmlChar *) xmlRealloc(buf, size * sizeof(xmlChar));
if (tmp == NULL) {
htmlErrMemory(ctxt, NULL);
xmlFree(buf);
ctxt->instate = state;
return;
}
buf = tmp;
}
count++;
if (count > 50) {
GROW;
count = 0;
}
COPY_BUF(l,buf,len,cur);
NEXTL(l);
cur = CUR_CHAR(l);
if (cur == 0) {
SHRINK;
GROW;
cur = CUR_CHAR(l);
}
}
buf[len] = 0;
if (cur != '>') {
htmlParseErr(ctxt, XML_ERR_PI_NOT_FINISHED,
"ParsePI: PI %s never end ...\n", target, NULL);
} else {
SKIP(1);
/*
* SAX: PI detected.
*/
if ((ctxt->sax) && (!ctxt->disableSAX) &&
(ctxt->sax->processingInstruction != NULL))
ctxt->sax->processingInstruction(ctxt->userData,
target, buf);
}
xmlFree(buf);
} else {
htmlParseErr(ctxt, XML_ERR_PI_NOT_STARTED,
"PI is not started correctly", NULL, NULL);
}
ctxt->instate = state;
}
}
/**
* htmlParseComment:
* @ctxt: an HTML parser context
*
* Parse an XML (SGML) comment <!-- .... -->
*
* [15] Comment ::= '<!--' ((Char - '-') | ('-' (Char - '-')))* '-->'
*/
static void
htmlParseComment(htmlParserCtxtPtr ctxt) {
xmlChar *buf = NULL;
int len;
int size = HTML_PARSER_BUFFER_SIZE;
int q, ql;
int r, rl;
int cur, l;
xmlParserInputState state;
/*
* Check that there is a comment right here.
*/
if ((RAW != '<') || (NXT(1) != '!') ||
(NXT(2) != '-') || (NXT(3) != '-')) return;
state = ctxt->instate;
ctxt->instate = XML_PARSER_COMMENT;
SHRINK;
SKIP(4);
buf = (xmlChar *) xmlMallocAtomic(size * sizeof(xmlChar));
if (buf == NULL) {
htmlErrMemory(ctxt, "buffer allocation failed\n");
ctxt->instate = state;
return;
}
q = CUR_CHAR(ql);
NEXTL(ql);
r = CUR_CHAR(rl);
NEXTL(rl);
cur = CUR_CHAR(l);
len = 0;
while (IS_CHAR(cur) &&
((cur != '>') ||
(r != '-') || (q != '-'))) {
if (len + 5 >= size) {
xmlChar *tmp;
size *= 2;
tmp = (xmlChar *) xmlRealloc(buf, size * sizeof(xmlChar));
if (tmp == NULL) {
xmlFree(buf);
htmlErrMemory(ctxt, "growing buffer failed\n");
ctxt->instate = state;
return;
}
buf = tmp;
}
COPY_BUF(ql,buf,len,q);
q = r;
ql = rl;
r = cur;
rl = l;
NEXTL(l);
cur = CUR_CHAR(l);
if (cur == 0) {
SHRINK;
GROW;
cur = CUR_CHAR(l);
}
}
buf[len] = 0;
if (!IS_CHAR(cur)) {
htmlParseErr(ctxt, XML_ERR_COMMENT_NOT_FINISHED,
"Comment not terminated \n<!--%.50s\n", buf, NULL);
xmlFree(buf);
} else {
NEXT;
if ((ctxt->sax != NULL) && (ctxt->sax->comment != NULL) &&
(!ctxt->disableSAX))
ctxt->sax->comment(ctxt->userData, buf);
xmlFree(buf);
}
ctxt->instate = state;
}
/**
* htmlParseCharRef:
* @ctxt: an HTML parser context
*
* parse Reference declarations
*
* [66] CharRef ::= '&#' [0-9]+ ';' |
* '&#x' [0-9a-fA-F]+ ';'
*
* Returns the value parsed (as an int)
*/
int
htmlParseCharRef(htmlParserCtxtPtr ctxt) {
int val = 0;
if ((ctxt == NULL) || (ctxt->input == NULL)) {
htmlParseErr(ctxt, XML_ERR_INTERNAL_ERROR,
"htmlParseCharRef: context error\n",
NULL, NULL);
return(0);
}
if ((CUR == '&') && (NXT(1) == '#') &&
((NXT(2) == 'x') || NXT(2) == 'X')) {
SKIP(3);
while (CUR != ';') {
if ((CUR >= '0') && (CUR <= '9'))
val = val * 16 + (CUR - '0');
else if ((CUR >= 'a') && (CUR <= 'f'))
val = val * 16 + (CUR - 'a') + 10;
else if ((CUR >= 'A') && (CUR <= 'F'))
val = val * 16 + (CUR - 'A') + 10;
else {
htmlParseErr(ctxt, XML_ERR_INVALID_HEX_CHARREF,
"htmlParseCharRef: invalid hexadecimal value\n",
NULL, NULL);
return(0);
}
NEXT;
}
if (CUR == ';')
NEXT;
} else if ((CUR == '&') && (NXT(1) == '#')) {
SKIP(2);
while (CUR != ';') {
if ((CUR >= '0') && (CUR <= '9'))
val = val * 10 + (CUR - '0');
else {
htmlParseErr(ctxt, XML_ERR_INVALID_DEC_CHARREF,
"htmlParseCharRef: invalid decimal value\n",
NULL, NULL);
return(0);
}
NEXT;
}
if (CUR == ';')
NEXT;
} else {
htmlParseErr(ctxt, XML_ERR_INVALID_CHARREF,
"htmlParseCharRef: invalid value\n", NULL, NULL);
}
/*
* Check the value IS_CHAR ...
*/
if (IS_CHAR(val)) {
return(val);
} else {
htmlParseErrInt(ctxt, XML_ERR_INVALID_CHAR,
"htmlParseCharRef: invalid xmlChar value %d\n",
val);
}
return(0);
}
/**
* htmlParseDocTypeDecl:
* @ctxt: an HTML parser context
*
* parse a DOCTYPE declaration
*
* [28] doctypedecl ::= '<!DOCTYPE' S Name (S ExternalID)? S?
* ('[' (markupdecl | PEReference | S)* ']' S?)? '>'
*/
static void
htmlParseDocTypeDecl(htmlParserCtxtPtr ctxt) {
const xmlChar *name;
xmlChar *ExternalID = NULL;
xmlChar *URI = NULL;
/*
* We know that '<!DOCTYPE' has been detected.
*/
SKIP(9);
SKIP_BLANKS;
/*
* Parse the DOCTYPE name.
*/
name = htmlParseName(ctxt);
if (name == NULL) {
htmlParseErr(ctxt, XML_ERR_NAME_REQUIRED,
"htmlParseDocTypeDecl : no DOCTYPE name !\n",
NULL, NULL);
}
/*
* Check that upper(name) == "HTML" !!!!!!!!!!!!!
*/
SKIP_BLANKS;
/*
* Check for SystemID and ExternalID
*/
URI = htmlParseExternalID(ctxt, &ExternalID);
SKIP_BLANKS;
/*
* We should be at the end of the DOCTYPE declaration.
*/
if (CUR != '>') {
htmlParseErr(ctxt, XML_ERR_DOCTYPE_NOT_FINISHED,
"DOCTYPE improperly terminated\n", NULL, NULL);
/* We shouldn't try to resynchronize ... */
}
NEXT;
/*
* Create or update the document accordingly to the DOCTYPE
*/
if ((ctxt->sax != NULL) && (ctxt->sax->internalSubset != NULL) &&
(!ctxt->disableSAX))
ctxt->sax->internalSubset(ctxt->userData, name, ExternalID, URI);
/*
* Cleanup, since we don't use all those identifiers
*/
if (URI != NULL) xmlFree(URI);
if (ExternalID != NULL) xmlFree(ExternalID);
}
/**
* 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 const xmlChar *
htmlParseAttribute(htmlParserCtxtPtr ctxt, xmlChar **value) {
const xmlChar *name;
xmlChar *val = NULL;
*value = NULL;
name = htmlParseHTMLName(ctxt);
if (name == NULL) {
htmlParseErr(ctxt, XML_ERR_NAME_REQUIRED,
"error parsing attribute name\n", NULL, NULL);
return(NULL);
}
/*
* read the value
*/
SKIP_BLANKS;
if (CUR == '=') {
NEXT;
SKIP_BLANKS;
val = htmlParseAttValue(ctxt);
/******
} else {
* TODO : some attribute must have values, some may not
if ((ctxt->sax != NULL) && (ctxt->sax->error != NULL))
ctxt->sax->warning(ctxt->userData,
"No value for attribute %s\n", name); */
}
*value = val;
return(name);
}
/**
* htmlCheckEncoding:
* @ctxt: an HTML parser context
* @attvalue: the attribute value
*
* Checks an http-equiv attribute from a Meta tag to detect
* the encoding
* If a new encoding is detected the parser is switched to decode
* it and pass UTF8
*/
static void
htmlCheckEncoding(htmlParserCtxtPtr ctxt, const xmlChar *attvalue) {
const xmlChar *encoding;
if ((ctxt == NULL) || (attvalue == NULL))
return;
/* do not change encoding */
if (ctxt->input->encoding != NULL)
return;
encoding = xmlStrcasestr(attvalue, BAD_CAST"charset=");
if (encoding != NULL) {
encoding += 8;
} else {
encoding = xmlStrcasestr(attvalue, BAD_CAST"charset =");
if (encoding != NULL)
encoding += 9;
}
if (encoding != NULL) {
xmlCharEncoding enc;
xmlCharEncodingHandlerPtr handler;
while ((*encoding == ' ') || (*encoding == '\t')) encoding++;
if (ctxt->input->encoding != NULL)
xmlFree((xmlChar *) ctxt->input->encoding);
ctxt->input->encoding = xmlStrdup(encoding);
enc = xmlParseCharEncoding((const char *) encoding);
/*
* registered set of known encodings
*/
if (enc != XML_CHAR_ENCODING_ERROR) {
xmlSwitchEncoding(ctxt, enc);
ctxt->charset = XML_CHAR_ENCODING_UTF8;
} else {
/*
* fallback for unknown encodings
*/
handler = xmlFindCharEncodingHandler((const char *) encoding);
if (handler != NULL) {
xmlSwitchToEncoding(ctxt, handler);
ctxt->charset = XML_CHAR_ENCODING_UTF8;
} else {
ctxt->errNo = XML_ERR_UNSUPPORTED_ENCODING;
}
}
if ((ctxt->input->buf != NULL) &&
(ctxt->input->buf->encoder != NULL) &&
(ctxt->input->buf->raw != NULL) &&
(ctxt->input->buf->buffer != NULL)) {
int nbchars;
int processed;
/*
* convert as much as possible to the parser reading buffer.
*/
processed = ctxt->input->cur - ctxt->input->base;
xmlBufferShrink(ctxt->input->buf->buffer, processed);
nbchars = xmlCharEncInFunc(ctxt->input->buf->encoder,
ctxt->input->buf->buffer,
ctxt->input->buf->raw);
if (nbchars < 0) {
htmlParseErr(ctxt, XML_ERR_INVALID_ENCODING,
"htmlCheckEncoding: encoder error\n",
NULL, NULL);
}
ctxt->input->base =
ctxt->input->cur = ctxt->input->buf->buffer->content;
}
}
}
/**
* htmlCheckMeta:
* @ctxt: an HTML parser context
* @atts: the attributes values
*
* Checks an attributes from a Meta tag
*/
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) && (!xmlStrcasecmp(att, BAD_CAST"http-equiv"))
&& (!xmlStrcasecmp(value, BAD_CAST"Content-Type")))
http = 1;
else if ((value != NULL) && (!xmlStrcasecmp(att, BAD_CAST"content")))
content = value;
att = atts[i++];
}
if ((http) && (content != NULL))
htmlCheckEncoding(ctxt, content);
}
/**
* htmlParseStartTag:
* @ctxt: an HTML parser context
*
* parse a start of tag either for rule element or
* EmptyElement. In both case we don't parse the tag closing chars.
*
* [40] STag ::= '<' Name (S Attribute)* S? '>'
*
* [44] EmptyElemTag ::= '<' Name (S Attribute)* S? '/>'
*
* With namespace:
*
* [NS 8] STag ::= '<' QName (S Attribute)* S? '>'
*
* [NS 10] EmptyElement ::= '<' QName (S Attribute)* S? '/>'
*
* Returns 0 in case of success and -1 in case of error.
*/
static int
htmlParseStartTag(htmlParserCtxtPtr ctxt) {
const xmlChar *name;
const xmlChar *attname;
xmlChar *attvalue;
const xmlChar **atts;
int nbatts = 0;
int maxatts;
int meta = 0;
int i;
if ((ctxt == NULL) || (ctxt->input == NULL)) {
htmlParseErr(ctxt, XML_ERR_INTERNAL_ERROR,
"htmlParseStartTag: context error\n", NULL, NULL);
return -1;
}
if (CUR != '<') return -1;
NEXT;
atts = ctxt->atts;
maxatts = ctxt->maxatts;
GROW;
name = htmlParseHTMLName(ctxt);
if (name == NULL) {
htmlParseErr(ctxt, XML_ERR_NAME_REQUIRED,
"htmlParseStartTag: invalid element name\n",
NULL, NULL);
/* Dump the bogus tag like browsers do */
while ((IS_CHAR_CH(CUR)) && (CUR != '>'))
NEXT;
return -1;
}
if (xmlStrEqual(name, BAD_CAST"meta"))
meta = 1;
/*
* 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);
return 0;
}
if ((ctxt->nameNr != 1) &&
(xmlStrEqual(name, BAD_CAST"head"))) {
htmlParseErr(ctxt, XML_HTML_STRUCURE_ERROR,
"htmlParseStartTag: misplaced <head> tag\n",
name, NULL);
return 0;
}
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);
while ((IS_CHAR_CH(CUR)) && (CUR != '>'))
NEXT;
return 0;
}
}
}
/*
* Now parse the attributes, it ends up with the ending
*
* (S Attribute)* S?
*/
SKIP_BLANKS;
while ((IS_CHAR_CH(CUR)) &&
(CUR != '>') &&
((CUR != '/') || (NXT(1) != '>'))) {
long cons = ctxt->nbChars;
GROW;
attname = htmlParseAttribute(ctxt, &attvalue);
if (attname != NULL) {
/*
* Well formedness requires at most one declaration of an attribute
*/
for (i = 0; i < nbatts;i += 2) {
if (xmlStrEqual(atts[i], attname)) {
htmlParseErr(ctxt, XML_ERR_ATTRIBUTE_REDEFINED,
"Attribute %s redefined\n", attname, NULL);
if (attvalue != NULL)
xmlFree(attvalue);
goto failed;
}
}
/*
* Add the pair to atts
*/
if (atts == NULL) {
maxatts = 22; /* allow for 10 attrs by default */
atts = (const xmlChar **)
xmlMalloc(maxatts * sizeof(xmlChar *));
if (atts == NULL) {
htmlErrMemory(ctxt, NULL);
if (attvalue != NULL)
xmlFree(attvalue);
goto failed;
}
ctxt->atts = atts;
ctxt->maxatts = maxatts;
} else if (nbatts + 4 > maxatts) {
const xmlChar **n;
maxatts *= 2;
n = (const xmlChar **) xmlRealloc((void *) atts,
maxatts * sizeof(const xmlChar *));
if (n == NULL) {
htmlErrMemory(ctxt, NULL);
if (attvalue != NULL)
xmlFree(attvalue);
goto failed;
}
atts = n;
ctxt->atts = atts;
ctxt->maxatts = maxatts;
}
atts[nbatts++] = attname;
atts[nbatts++] = attvalue;
atts[nbatts] = NULL;
atts[nbatts + 1] = NULL;
}
else {
if (attvalue != NULL)
xmlFree(attvalue);
/* Dump the bogus attribute string up to the next blank or
* the end of the tag. */
while ((IS_CHAR_CH(CUR)) &&
!(IS_BLANK_CH(CUR)) && (CUR != '>') &&
((CUR != '/') || (NXT(1) != '>')))
NEXT;
}
failed:
SKIP_BLANKS;
if (cons == ctxt->nbChars) {
htmlParseErr(ctxt, XML_ERR_INTERNAL_ERROR,
"htmlParseStartTag: problem parsing attributes\n",
NULL, NULL);
break;
}
}
/*
* Handle specific association to the META tag
*/
if (meta)
htmlCheckMeta(ctxt, atts);
/*
* SAX: Start of Element !
*/
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);
}
if (atts != NULL) {
for (i = 1;i < nbatts;i += 2) {
if (atts[i] != NULL)
xmlFree((xmlChar *) atts[i]);
}
}
return 0;
}
/**
* 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 int
htmlParseEndTag(htmlParserCtxtPtr ctxt)
{
const xmlChar *name;
const xmlChar *oldname;
int i, ret;
if ((CUR != '<') || (NXT(1) != '/')) {
htmlParseErr(ctxt, XML_ERR_LTSLASH_REQUIRED,
"htmlParseEndTag: '</' not found\n", NULL, NULL);
return (0);
}
SKIP(2);
name = htmlParseHTMLName(ctxt);
if (name == NULL)
return (0);
/*
* We should definitely be at the ending "S? '>'" part
*/
SKIP_BLANKS;
if ((!IS_CHAR_CH(CUR)) || (CUR != '>')) {
htmlParseErr(ctxt, XML_ERR_GT_REQUIRED,
"End tag : expected '>'\n", NULL, NULL);
if (ctxt->recovery) {
/*
* We're not at the ending > !!
* Error, unless in recover mode where we search forwards
* until we find a >
*/
while (CUR != '\0' && CUR != '>') NEXT;
NEXT;
}
} else
NEXT;
/*
* If the name read is not one of the element in the parsing stack
* then return, it's just an error.
*/
for (i = (ctxt->nameNr - 1); i >= 0; i--) {
if (xmlStrEqual(name, ctxt->nameTab[i]))
break;
}
if (i < 0) {
htmlParseErr(ctxt, XML_ERR_TAG_NAME_MISMATCH,
"Unexpected end tag : %s\n", name, NULL);
return (0);
}
/*
* 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 (!xmlStrEqual(name, ctxt->name)) {
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))) {
if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL))
ctxt->sax->endElement(ctxt->userData, name);
htmlnamePop(ctxt);
ret = 1;
} else {
ret = 0;
}
return (ret);
}
/**
* htmlParseReference:
* @ctxt: an HTML parser context
*
* parse and handle entity references in content,
* this will end-up in a call to character() since this is either a
* CharRef, or a predefined entity.
*/
static void
htmlParseReference(htmlParserCtxtPtr ctxt) {
const htmlEntityDesc * ent;
xmlChar out[6];
const xmlChar *name;
if (CUR != '&') return;
if (NXT(1) == '#') {
unsigned int c;
int bits, i = 0;
c = htmlParseCharRef(ctxt);
if (c == 0)
return;
if (c < 0x80) { out[i++]= c; bits= -6; }
else if (c < 0x800) { out[i++]=((c >> 6) & 0x1F) | 0xC0; bits= 0; }
else if (c < 0x10000) { out[i++]=((c >> 12) & 0x0F) | 0xE0; bits= 6; }
else { out[i++]=((c >> 18) & 0x07) | 0xF0; bits= 12; }
for ( ; bits >= 0; bits-= 6) {
out[i++]= ((c >> bits) & 0x3F) | 0x80;
}
out[i] = 0;
htmlCheckParagraph(ctxt);
if ((ctxt->sax != NULL) && (ctxt->sax->characters != NULL))
ctxt->sax->characters(ctxt->userData, out, i);
} else {
ent = htmlParseEntityRef(ctxt, &name);
if (name == NULL) {
htmlCheckParagraph(ctxt);
if ((ctxt->sax != NULL) && (ctxt->sax->characters != NULL))
ctxt->sax->characters(ctxt->userData, BAD_CAST "&", 1);
return;
}
if ((ent == NULL) || !(ent->value > 0)) {
htmlCheckParagraph(ctxt);
if ((ctxt->sax != NULL) && (ctxt->sax->characters != NULL)) {
ctxt->sax->characters(ctxt->userData, BAD_CAST "&", 1);
ctxt->sax->characters(ctxt->userData, name, xmlStrlen(name));
/* ctxt->sax->characters(ctxt->userData, BAD_CAST ";", 1); */
}
} else {
unsigned int c;
int bits, i = 0;
c = ent->value;
if (c < 0x80)
{ out[i++]= c; bits= -6; }
else if (c < 0x800)
{ out[i++]=((c >> 6) & 0x1F) | 0xC0; bits= 0; }
else if (c < 0x10000)
{ out[i++]=((c >> 12) & 0x0F) | 0xE0; bits= 6; }
else
{ out[i++]=((c >> 18) & 0x07) | 0xF0; bits= 12; }
for ( ; bits >= 0; bits-= 6) {
out[i++]= ((c >> bits) & 0x3F) | 0x80;
}
out[i] = 0;
htmlCheckParagraph(ctxt);
if ((ctxt->sax != NULL) && (ctxt->sax->characters != NULL))
ctxt->sax->characters(ctxt->userData, out, i);
}
}
}
/**
* htmlParseContent:
* @ctxt: an HTML parser context
*
* Parse a content: comment, sub-element, reference or text.
*/
static void
htmlParseContent(htmlParserCtxtPtr ctxt) {
xmlChar *currentNode;
int depth;
currentNode = xmlStrdup(ctxt->name);
depth = ctxt->nameNr;
while (1) {
long cons = ctxt->nbChars;
GROW;
/*
* Our tag or one of it's parent or children is ending.
*/
if ((CUR == '<') && (NXT(1) == '/')) {
if (htmlParseEndTag(ctxt) &&
((currentNode != NULL) || (ctxt->nameNr == 0))) {
if (currentNode != NULL)
xmlFree(currentNode);
return;
}
continue; /* while */
}
/*
* Has this node been popped out during parsing of
* the next element
*/
if ((ctxt->nameNr > 0) && (depth >= ctxt->nameNr) &&
(!xmlStrEqual(currentNode, ctxt->name)))
{
if (currentNode != NULL) xmlFree(currentNode);
return;
}
if ((CUR != 0) && ((xmlStrEqual(currentNode, BAD_CAST"script")) ||
(xmlStrEqual(currentNode, BAD_CAST"style")))) {
/*
* Handle SCRIPT/STYLE separately
*/
htmlParseScript(ctxt);
} else {
/*
* Sometimes DOCTYPE arrives in the middle of the document
*/
if ((CUR == '<') && (NXT(1) == '!') &&
(UPP(2) == 'D') && (UPP(3) == 'O') &&
(UPP(4) == 'C') && (UPP(5) == 'T') &&
(UPP(6) == 'Y') && (UPP(7) == 'P') &&
(UPP(8) == 'E')) {
htmlParseErr(ctxt, XML_HTML_STRUCURE_ERROR,
"Misplaced DOCTYPE declaration\n",
BAD_CAST "DOCTYPE" , NULL);
htmlParseDocTypeDecl(ctxt);
}
/*
* First case : a comment
*/
if ((CUR == '<') && (NXT(1) == '!') &&
(NXT(2) == '-') && (NXT(3) == '-')) {
htmlParseComment(ctxt);
}
/*
* Second case : a Processing Instruction.
*/
else if ((CUR == '<') && (NXT(1) == '?')) {
htmlParsePI(ctxt);
}
/*
* Third case : a sub-element.
*/
else if (CUR == '<') {
htmlParseElement(ctxt);
}
/*
* Fourth case : a reference. If if has not been resolved,
* parsing returns it's Name, create the node
*/
else if (CUR == '&') {
htmlParseReference(ctxt);
}
/*
* Fifth case : end of the resource
*/
else if (CUR == 0) {
htmlAutoCloseOnEnd(ctxt);
break;
}
/*
* Last case, text. Note that References are handled directly.
*/
else {
htmlParseCharData(ctxt);
}
if (cons == ctxt->nbChars) {
if (ctxt->node != NULL) {
htmlParseErr(ctxt, XML_ERR_INTERNAL_ERROR,
"detected an error in element content\n",
NULL, NULL);
}
break;
}
}
GROW;
}
if (currentNode != NULL) xmlFree(currentNode);
}
/**
* htmlParseContent:
* @ctxt: an HTML parser context
*
* Parse a content: comment, sub-element, reference or text.
*/
void
__htmlParseContent(void *ctxt) {
if (ctxt != NULL)
htmlParseContent((htmlParserCtxtPtr) ctxt);
}
/**
* htmlParseElement:
* @ctxt: an HTML parser context
*
* parse an HTML element, this is highly recursive
*
* [39] element ::= EmptyElemTag | STag content ETag
*
* [41] Attribute ::= Name Eq AttValue
*/
void
htmlParseElement(htmlParserCtxtPtr ctxt) {
const xmlChar *name;
xmlChar *currentNode = NULL;
const htmlElemDesc * info;
htmlParserNodeInfo node_info;
int failed;
int depth;
const xmlChar *oldptr;
if ((ctxt == NULL) || (ctxt->input == NULL)) {
htmlParseErr(ctxt, XML_ERR_INTERNAL_ERROR,
"htmlParseElement: context error\n", NULL, NULL);
return;
}
/* 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;
}
failed = htmlParseStartTag(ctxt);
name = ctxt->name;
if (failed || (name == NULL)) {
if (CUR == '>')
NEXT;
return;
}
/*
* Lookup the info for that element.
*/
info = htmlTagLookup(name);
if (info == NULL) {
htmlParseErr(ctxt, XML_HTML_UNKNOWN_TAG,
"Tag %s invalid\n", name, NULL);
}
/*
* Check for an Empty Element labeled the XML/SGML way
*/
if ((CUR == '/') && (NXT(1) == '>')) {
SKIP(2);
if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL))
ctxt->sax->endElement(ctxt->userData, name);
htmlnamePop(ctxt);
return;
}
if (CUR == '>') {
NEXT;
} else {
htmlParseErr(ctxt, XML_ERR_GT_REQUIRED,
"Couldn't find end of Start Tag %s\n", name, NULL);
/*
* end of parsing of this node.
*/
if (xmlStrEqual(name, ctxt->name)) {
nodePop(ctxt);
htmlnamePop(ctxt);
}
/*
* Capture end position and add node
*/
if (ctxt->record_info) {
node_info.end_pos = ctxt->input->consumed +
(CUR_PTR - ctxt->input->base);
node_info.end_line = ctxt->input->line;
node_info.node = ctxt->node;
xmlParserAddNodeInfo(ctxt, &node_info);
}
return;
}
/*
* Check for an Empty Element from DTD definition
*/
if ((info != NULL) && (info->empty)) {
if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL))
ctxt->sax->endElement(ctxt->userData, name);
htmlnamePop(ctxt);
return;
}
/*
* Parse the content of the element:
*/
currentNode = xmlStrdup(ctxt->name);
depth = ctxt->nameNr;
while (IS_CHAR_CH(CUR)) {
oldptr = ctxt->input->cur;
htmlParseContent(ctxt);
if (oldptr==ctxt->input->cur) break;
if (ctxt->nameNr < depth) break;
}
/*
* Capture end position and add node
*/
if ( currentNode != NULL && ctxt->record_info ) {
node_info.end_pos = ctxt->input->consumed +
(CUR_PTR - ctxt->input->base);
node_info.end_line = ctxt->input->line;
node_info.node = ctxt->node;
xmlParserAddNodeInfo(ctxt, &node_info);
}
if (!IS_CHAR_CH(CUR)) {
htmlAutoCloseOnEnd(ctxt);
}
if (currentNode != NULL)
xmlFree(currentNode);
}
/**
* htmlParseDocument:
* @ctxt: an HTML parser context
*
* parse an HTML document (and build a tree if using the standard SAX
* interface).
*
* Returns 0, -1 in case of error. the parser context is augmented
* as a result of the parsing.
*/
int
htmlParseDocument(htmlParserCtxtPtr ctxt) {
xmlDtdPtr dtd;
xmlInitParser();
htmlDefaultSAXHandlerInit();
if ((ctxt == NULL) || (ctxt->input == NULL)) {
htmlParseErr(ctxt, XML_ERR_INTERNAL_ERROR,
"htmlParseDocument: context error\n", NULL, NULL);
return(XML_ERR_INTERNAL_ERROR);
}
ctxt->html = 1;
GROW;
/*
* SAX: beginning of the document processing.
*/
if ((ctxt->sax) && (ctxt->sax->setDocumentLocator))
ctxt->sax->setDocumentLocator(ctxt->userData, &xmlDefaultSAXLocator);
/*
* Wipe out everything which is before the first '<'
*/
SKIP_BLANKS;
if (CUR == 0) {
htmlParseErr(ctxt, XML_ERR_DOCUMENT_EMPTY,
"Document is empty\n", NULL, NULL);
}
if ((ctxt->sax) && (ctxt->sax->startDocument) && (!ctxt->disableSAX))
ctxt->sax->startDocument(ctxt->userData);
/*
* Parse possible comments and PIs before any content
*/
while (((CUR == '<') && (NXT(1) == '!') &&
(NXT(2) == '-') && (NXT(3) == '-')) ||
((CUR == '<') && (NXT(1) == '?'))) {
htmlParseComment(ctxt);
htmlParsePI(ctxt);
SKIP_BLANKS;
}
/*
* Then possibly doc type declaration(s) and more Misc
* (doctypedecl Misc*)?
*/
if ((CUR == '<') && (NXT(1) == '!') &&
(UPP(2) == 'D') && (UPP(3) == 'O') &&
(UPP(4) == 'C') && (UPP(5) == 'T') &&
(UPP(6) == 'Y') && (UPP(7) == 'P') &&
(UPP(8) == 'E')) {
htmlParseDocTypeDecl(ctxt);
}
SKIP_BLANKS;
/*
* Parse possible comments and PIs before any content
*/
while (((CUR == '<') && (NXT(1) == '!') &&
(NXT(2) == '-') && (NXT(3) == '-')) ||
((CUR == '<') && (NXT(1) == '?'))) {
htmlParseComment(ctxt);
htmlParsePI(ctxt);
SKIP_BLANKS;
}
/*
* Time to start parsing the tree itself
*/
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->myDoc != NULL) {
dtd = xmlGetIntSubset(ctxt->myDoc);
if (dtd == NULL)
ctxt->myDoc->intSubset =
xmlCreateIntSubset(ctxt->myDoc, BAD_CAST "html",
BAD_CAST "-//W3C//DTD HTML 4.0 Transitional//EN",
BAD_CAST "http://www.w3.org/TR/REC-html40/loose.dtd");
}
if (! ctxt->wellFormed) return(-1);
return(0);
}
/************************************************************************
* *
* Parser contexts handling *
* *
************************************************************************/
/**
* htmlInitParserCtxt:
* @ctxt: an HTML parser context
*
* Initialize a parser context
*
* Returns 0 in case of success and -1 in case of error
*/
static int
htmlInitParserCtxt(htmlParserCtxtPtr ctxt)
{
htmlSAXHandler *sax;
if (ctxt == NULL) return(-1);
memset(ctxt, 0, sizeof(htmlParserCtxt));
ctxt->dict = xmlDictCreate();
if (ctxt->dict == NULL) {
htmlErrMemory(NULL, "htmlInitParserCtxt: out of memory\n");
return(-1);
}
sax = (htmlSAXHandler *) xmlMalloc(sizeof(htmlSAXHandler));
if (sax == NULL) {
htmlErrMemory(NULL, "htmlInitParserCtxt: out of memory\n");
return(-1);
}
else
memset(sax, 0, sizeof(htmlSAXHandler));
/* Allocate the Input stack */
ctxt->inputTab = (htmlParserInputPtr *)
xmlMalloc(5 * sizeof(htmlParserInputPtr));
if (ctxt->inputTab == NULL) {
htmlErrMemory(NULL, "htmlInitParserCtxt: out of memory\n");
ctxt->inputNr = 0;
ctxt->inputMax = 0;
ctxt->input = 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) {
htmlErrMemory(NULL, "htmlInitParserCtxt: out of memory\n");
ctxt->nodeNr = 0;
ctxt->nodeMax = 0;
ctxt->node = NULL;
ctxt->inputNr = 0;
ctxt->inputMax = 0;
ctxt->input = 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) {
htmlErrMemory(NULL, "htmlInitParserCtxt: out of memory\n");
ctxt->nameNr = 0;
ctxt->nameMax = 10;
ctxt->name = NULL;
ctxt->nodeNr = 0;
ctxt->nodeMax = 0;
ctxt->node = NULL;
ctxt->inputNr = 0;
ctxt->inputMax = 0;
ctxt->input = NULL;
return(-1);
}
ctxt->nameNr = 0;
ctxt->nameMax = 10;
ctxt->name = NULL;
if (sax == NULL) ctxt->sax = (xmlSAXHandlerPtr) &htmlDefaultSAXHandler;
else {
ctxt->sax = sax;
memcpy(sax, &htmlDefaultSAXHandler, sizeof(xmlSAXHandlerV1));
}
ctxt->userData = ctxt;
ctxt->myDoc = NULL;
ctxt->wellFormed = 1;
ctxt->replaceEntities = 0;
ctxt->linenumbers = xmlLineNumbersDefaultValue;
ctxt->html = 1;
ctxt->vctxt.finishDtd = XML_CTXT_FINISH_DTD_0;
ctxt->vctxt.userData = ctxt;
ctxt->vctxt.error = xmlParserValidityError;
ctxt->vctxt.warning = xmlParserValidityWarning;
ctxt->record_info = 0;
ctxt->validate = 0;
ctxt->nbChars = 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 parser context.
*
* Returns the xmlParserCtxtPtr or NULL
*/
static htmlParserCtxtPtr
htmlNewParserCtxt(void)
{
xmlParserCtxtPtr ctxt;
ctxt = (xmlParserCtxtPtr) xmlMalloc(sizeof(xmlParserCtxt));
if (ctxt == NULL) {
htmlErrMemory(NULL, "NewParserCtxt: out of memory\n");
return(NULL);
}
memset(ctxt, 0, sizeof(xmlParserCtxt));
if (htmlInitParserCtxt(ctxt) < 0) {
htmlFreeParserCtxt(ctxt);
return(NULL);
}
return(ctxt);
}
/**
* htmlCreateMemoryParserCtxt:
* @buffer: a pointer to a char array
* @size: the size of the array
*
* Create a parser context for an HTML in-memory document.
*
* Returns the new parser context or NULL
*/
htmlParserCtxtPtr
htmlCreateMemoryParserCtxt(const char *buffer, int size) {
xmlParserCtxtPtr ctxt;
xmlParserInputPtr input;
xmlParserInputBufferPtr buf;
if (buffer == NULL)
return(NULL);
if (size <= 0)
return(NULL);
ctxt = htmlNewParserCtxt();
if (ctxt == NULL)
return(NULL);
buf = xmlParserInputBufferCreateMem(buffer, size, XML_CHAR_ENCODING_NONE);
if (buf == NULL) return(NULL);
input = xmlNewInputStream(ctxt);
if (input == NULL) {
xmlFreeParserCtxt(ctxt);
return(NULL);
}
input->filename = NULL;
input->buf = buf;
input->base = input->buf->buffer->content;
input->cur = input->buf->buffer->content;
input->end = &input->buf->buffer->content[input->buf->buffer->use];
inputPush(ctxt, input);
return(ctxt);
}
/**
* htmlCreateDocParserCtxt:
* @cur: a pointer to an array of xmlChar
* @encoding: a free form C string describing the HTML document encoding, or NULL
*
* Create a parser context for an HTML document.
*
* TODO: check the need to add encoding handling there
*
* Returns the new parser context or NULL
*/
static htmlParserCtxtPtr
htmlCreateDocParserCtxt(xmlChar *cur, const char *encoding ATTRIBUTE_UNUSED) {
int len;
htmlParserCtxtPtr ctxt;
if (cur == NULL)
return(NULL);
len = xmlStrlen(cur);
ctxt = htmlCreateMemoryParserCtxt((char *)cur, len);
if (encoding != NULL) {
xmlCharEncoding enc;
xmlCharEncodingHandlerPtr handler;
if (ctxt->input->encoding != NULL)
xmlFree((xmlChar *) ctxt->input->encoding);
ctxt->input->encoding = xmlStrdup((const xmlChar *) encoding);
enc = xmlParseCharEncoding(encoding);
/*
* registered set of known encodings
*/
if (enc != XML_CHAR_ENCODING_ERROR) {
xmlSwitchEncoding(ctxt, enc);
if (ctxt->errNo == XML_ERR_UNSUPPORTED_ENCODING) {
htmlParseErr(ctxt, XML_ERR_UNSUPPORTED_ENCODING,
"Unsupported encoding %s\n",
(const xmlChar *) encoding, NULL);
}
} else {
/*
* fallback for unknown encodings
*/
handler = xmlFindCharEncodingHandler((const char *) encoding);
if (handler != NULL) {
xmlSwitchToEncoding(ctxt, handler);
} else {
htmlParseErr(ctxt, XML_ERR_UNSUPPORTED_ENCODING,
"Unsupported encoding %s\n",
(const xmlChar *) encoding, NULL);
}
}
}
return(ctxt);
}
#ifdef LIBXML_PUSH_ENABLED
/************************************************************************
* *
* Progressive parsing interfaces *
* *
************************************************************************/
/**
* htmlParseLookupSequence:
* @ctxt: an HTML parser context
* @first: the first char to lookup
* @next: the next char to lookup or zero
* @third: the next char to lookup or zero
* @comment: flag to force checking inside comments
*
* Try to find if a sequence (first, next, third) or just (first next) or
* (first) is available in the input stream.
* This function has a side effect of (possibly) incrementing ctxt->checkIndex
* to avoid rescanning sequences of bytes, it DOES change the state of the
* parser, do not use liberally.
* This is basically similar to xmlParseLookupSequence()
*
* Returns the index to the current parsing point if the full sequence
* is available, -1 otherwise.
*/
static int
htmlParseLookupSequence(htmlParserCtxtPtr ctxt, xmlChar first,
xmlChar next, xmlChar third, int iscomment) {
int base, len;
htmlParserInputPtr in;
const xmlChar *buf;
int incomment = 0;
in = ctxt->input;
if (in == NULL) return(-1);
base = in->cur - in->base;
if (base < 0) return(-1);
if (ctxt->checkIndex > base)
base = ctxt->checkIndex;
if (in->buf == NULL) {
buf = in->base;
len = in->length;
} else {
buf = in->buf->buffer->content;
len = in->buf->buffer->use;
}
/* take into account the sequence length */
if (third) len -= 2;
else if (next) len --;
for (;base < len;base++) {
if (!incomment && (base + 4 < len) && !iscomment) {
if ((buf[base] == '<') && (buf[base + 1] == '!') &&
(buf[base + 2] == '-') && (buf[base + 3] == '-')) {
incomment = 1;
/* do not increment past <! - some people use <!--> */
base += 2;
}
}
if (incomment) {
if (base + 3 > len)
return(-1);
if ((buf[base] == '-') && (buf[base + 1] == '-') &&
(buf[base + 2] == '>')) {
incomment = 0;
base += 2;
}
continue;
}
if (buf[base] == first) {
if (third != 0) {
if ((buf[base + 1] != next) ||
(buf[base + 2] != third)) continue;
} else if (next != 0) {
if (buf[base + 1] != next) continue;
}
ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
if (next == 0)
xmlGenericError(xmlGenericErrorContext,
"HPP: lookup '%c' found at %d\n",
first, base);
else if (third == 0)
xmlGenericError(xmlGenericErrorContext,
"HPP: lookup '%c%c' found at %d\n",
first, next, base);
else
xmlGenericError(xmlGenericErrorContext,
"HPP: lookup '%c%c%c' found at %d\n",
first, next, third, base);
#endif
return(base - (in->cur - in->base));
}
}
ctxt->checkIndex = base;
#ifdef DEBUG_PUSH
if (next == 0)
xmlGenericError(xmlGenericErrorContext,
"HPP: lookup '%c' failed\n", first);
else if (third == 0)
xmlGenericError(xmlGenericErrorContext,
"HPP: lookup '%c%c' failed\n", first, next);
else
xmlGenericError(xmlGenericErrorContext,
"HPP: lookup '%c%c%c' failed\n", first, next, third);
#endif
return(-1);
}
/**
* htmlParseTryOrFinish:
* @ctxt: an HTML parser context
* @terminate: last chunk indicator
*
* Try to progress on parsing
*
* Returns zero if no parsing was possible
*/
static int
htmlParseTryOrFinish(htmlParserCtxtPtr ctxt, int terminate) {
int ret = 0;
htmlParserInputPtr in;
int avail = 0;
xmlChar cur, next;
#ifdef DEBUG_PUSH
switch (ctxt->instate) {
case XML_PARSER_EOF:
xmlGenericError(xmlGenericErrorContext,
"HPP: try EOF\n"); break;
case XML_PARSER_START:
xmlGenericError(xmlGenericErrorContext,
"HPP: try START\n"); break;
case XML_PARSER_MISC:
xmlGenericError(xmlGenericErrorContext,
"HPP: try MISC\n");break;
case XML_PARSER_COMMENT:
xmlGenericError(xmlGenericErrorContext,
"HPP: try COMMENT\n");break;
case XML_PARSER_PROLOG:
xmlGenericError(xmlGenericErrorContext,
"HPP: try PROLOG\n");break;
case XML_PARSER_START_TAG:
xmlGenericError(xmlGenericErrorContext,
"HPP: try START_TAG\n");break;
case XML_PARSER_CONTENT:
xmlGenericError(xmlGenericErrorContext,
"HPP: try CONTENT\n");break;
case XML_PARSER_CDATA_SECTION:
xmlGenericError(xmlGenericErrorContext,
"HPP: try CDATA_SECTION\n");break;
case XML_PARSER_END_TAG:
xmlGenericError(xmlGenericErrorContext,
"HPP: try END_TAG\n");break;
case XML_PARSER_ENTITY_DECL:
xmlGenericError(xmlGenericErrorContext,
"HPP: try ENTITY_DECL\n");break;
case XML_PARSER_ENTITY_VALUE:
xmlGenericError(xmlGenericErrorContext,
"HPP: try ENTITY_VALUE\n");break;
case XML_PARSER_ATTRIBUTE_VALUE:
xmlGenericError(xmlGenericErrorContext,
"HPP: try ATTRIBUTE_VALUE\n");break;
case XML_PARSER_DTD:
xmlGenericError(xmlGenericErrorContext,
"HPP: try DTD\n");break;
case XML_PARSER_EPILOG:
xmlGenericError(xmlGenericErrorContext,
"HPP: try EPILOG\n");break;
case XML_PARSER_PI:
xmlGenericError(xmlGenericErrorContext,
"HPP: try PI\n");break;
case XML_PARSER_SYSTEM_LITERAL:
xmlGenericError(xmlGenericErrorContext,
"HPP: try SYSTEM_LITERAL\n");break;
}
#endif
while (1) {
in = ctxt->input;
if (in == NULL) break;
if (in->buf == NULL)
avail = in->length - (in->cur - in->base);
else
avail = in->buf->buffer->use - (in->cur - in->base);
if ((avail == 0) && (terminate)) {
htmlAutoCloseOnEnd(ctxt);
if ((ctxt->nameNr == 0) && (ctxt->instate != XML_PARSER_EOF)) {
/*
* SAX: end of the document processing.
*/
ctxt->instate = XML_PARSER_EOF;
if ((ctxt->sax) && (ctxt->sax->endDocument != NULL))
ctxt->sax->endDocument(ctxt->userData);
}
}
if (avail < 1)
goto done;
cur = in->cur[0];
if (cur == 0) {
SKIP(1);
continue;
}
switch (ctxt->instate) {
case XML_PARSER_EOF:
/*
* Document parsing is done !
*/
goto done;
case XML_PARSER_START:
/*
* Very first chars read from the document flow.
*/
cur = in->cur[0];
if (IS_BLANK_CH(cur)) {
SKIP_BLANKS;
if (in->buf == NULL)
avail = in->length - (in->cur - in->base);
else
avail = in->buf->buffer->use - (in->cur - in->base);
}
if ((ctxt->sax) && (ctxt->sax->setDocumentLocator))
ctxt->sax->setDocumentLocator(ctxt->userData,
&xmlDefaultSAXLocator);
if ((ctxt->sax) && (ctxt->sax->startDocument) &&
(!ctxt->disableSAX))
ctxt->sax->startDocument(ctxt->userData);
cur = in->cur[0];
next = in->cur[1];
if ((cur == '<') && (next == '!') &&
(UPP(2) == 'D') && (UPP(3) == 'O') &&
(UPP(4) == 'C') && (UPP(5) == 'T') &&
(UPP(6) == 'Y') && (UPP(7) == 'P') &&
(UPP(8) == 'E')) {
if ((!terminate) &&
(htmlParseLookupSequence(ctxt, '>', 0, 0, 0) < 0))
goto done;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: Parsing internal subset\n");
#endif
htmlParseDocTypeDecl(ctxt);
ctxt->instate = XML_PARSER_PROLOG;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: entering PROLOG\n");
#endif
} else {
ctxt->instate = XML_PARSER_MISC;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: entering MISC\n");
#endif
}
break;
case XML_PARSER_MISC:
SKIP_BLANKS;
if (in->buf == NULL)
avail = in->length - (in->cur - in->base);
else
avail = in->buf->buffer->use - (in->cur - in->base);
if (avail < 2)
goto done;
cur = in->cur[0];
next = in->cur[1];
if ((cur == '<') && (next == '!') &&
(in->cur[2] == '-') && (in->cur[3] == '-')) {
if ((!terminate) &&
(htmlParseLookupSequence(ctxt, '-', '-', '>', 1) < 0))
goto done;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: Parsing Comment\n");
#endif
htmlParseComment(ctxt);
ctxt->instate = XML_PARSER_MISC;
} else if ((cur == '<') && (next == '?')) {
if ((!terminate) &&
(htmlParseLookupSequence(ctxt, '>', 0, 0, 0) < 0))
goto done;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: Parsing PI\n");
#endif
htmlParsePI(ctxt);
ctxt->instate = XML_PARSER_MISC;
} else if ((cur == '<') && (next == '!') &&
(UPP(2) == 'D') && (UPP(3) == 'O') &&
(UPP(4) == 'C') && (UPP(5) == 'T') &&
(UPP(6) == 'Y') && (UPP(7) == 'P') &&
(UPP(8) == 'E')) {
if ((!terminate) &&
(htmlParseLookupSequence(ctxt, '>', 0, 0, 0) < 0))
goto done;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: Parsing internal subset\n");
#endif
htmlParseDocTypeDecl(ctxt);
ctxt->instate = XML_PARSER_PROLOG;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: entering PROLOG\n");
#endif
} else if ((cur == '<') && (next == '!') &&
(avail < 9)) {
goto done;
} else {
ctxt->instate = XML_PARSER_START_TAG;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: entering START_TAG\n");
#endif
}
break;
case XML_PARSER_PROLOG:
SKIP_BLANKS;
if (in->buf == NULL)
avail = in->length - (in->cur - in->base);
else
avail = in->buf->buffer->use - (in->cur - in->base);
if (avail < 2)
goto done;
cur = in->cur[0];
next = in->cur[1];
if ((cur == '<') && (next == '!') &&
(in->cur[2] == '-') && (in->cur[3] == '-')) {
if ((!terminate) &&
(htmlParseLookupSequence(ctxt, '-', '-', '>', 1) < 0))
goto done;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: Parsing Comment\n");
#endif
htmlParseComment(ctxt);
ctxt->instate = XML_PARSER_PROLOG;
} else if ((cur == '<') && (next == '?')) {
if ((!terminate) &&
(htmlParseLookupSequence(ctxt, '>', 0, 0, 0) < 0))
goto done;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: Parsing PI\n");
#endif
htmlParsePI(ctxt);
ctxt->instate = XML_PARSER_PROLOG;
} else if ((cur == '<') && (next == '!') &&
(avail < 4)) {
goto done;
} else {
ctxt->instate = XML_PARSER_START_TAG;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: entering START_TAG\n");
#endif
}
break;
case XML_PARSER_EPILOG:
if (in->buf == NULL)
avail = in->length - (in->cur - in->base);
else
avail = in->buf->buffer->use - (in->cur - in->base);
if (avail < 1)
goto done;
cur = in->cur[0];
if (IS_BLANK_CH(cur)) {
htmlParseCharData(ctxt);
goto done;
}
if (avail < 2)
goto done;
next = in->cur[1];
if ((cur == '<') && (next == '!') &&
(in->cur[2] == '-') && (in->cur[3] == '-')) {
if ((!terminate) &&
(htmlParseLookupSequence(ctxt, '-', '-', '>', 1) < 0))
goto done;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: Parsing Comment\n");
#endif
htmlParseComment(ctxt);
ctxt->instate = XML_PARSER_EPILOG;
} else if ((cur == '<') && (next == '?')) {
if ((!terminate) &&
(htmlParseLookupSequence(ctxt, '>', 0, 0, 0) < 0))
goto done;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: Parsing PI\n");
#endif
htmlParsePI(ctxt);
ctxt->instate = XML_PARSER_EPILOG;
} else if ((cur == '<') && (next == '!') &&
(avail < 4)) {
goto done;
} else {
ctxt->errNo = XML_ERR_DOCUMENT_END;
ctxt->wellFormed = 0;
ctxt->instate = XML_PARSER_EOF;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: entering EOF\n");
#endif
if ((ctxt->sax) && (ctxt->sax->endDocument != NULL))
ctxt->sax->endDocument(ctxt->userData);
goto done;
}
break;
case XML_PARSER_START_TAG: {
const xmlChar *name;
int failed;
const htmlElemDesc * info;
if (avail < 2)
goto done;
cur = in->cur[0];
if (cur != '<') {
ctxt->instate = XML_PARSER_CONTENT;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: entering CONTENT\n");
#endif
break;
}
if (in->cur[1] == '/') {
ctxt->instate = XML_PARSER_END_TAG;
ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: entering END_TAG\n");
#endif
break;
}
if ((!terminate) &&
(htmlParseLookupSequence(ctxt, '>', 0, 0, 0) < 0))
goto done;
failed = htmlParseStartTag(ctxt);
name = ctxt->name;
if (failed ||
(name == NULL)) {
if (CUR == '>')
NEXT;
break;
}
/*
* Lookup the info for that element.
*/
info = htmlTagLookup(name);
if (info == NULL) {
htmlParseErr(ctxt, XML_HTML_UNKNOWN_TAG,
"Tag %s invalid\n", name, NULL);
}
/*
* Check for an Empty Element labeled the XML/SGML way
*/
if ((CUR == '/') && (NXT(1) == '>')) {
SKIP(2);
if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL))
ctxt->sax->endElement(ctxt->userData, name);
htmlnamePop(ctxt);
ctxt->instate = XML_PARSER_CONTENT;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: entering CONTENT\n");
#endif
break;
}
if (CUR == '>') {
NEXT;
} else {
htmlParseErr(ctxt, XML_ERR_GT_REQUIRED,
"Couldn't find end of Start Tag %s\n",
name, NULL);
/*
* end of parsing of this node.
*/
if (xmlStrEqual(name, ctxt->name)) {
nodePop(ctxt);
htmlnamePop(ctxt);
}
ctxt->instate = XML_PARSER_CONTENT;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: entering CONTENT\n");
#endif
break;
}
/*
* Check for an Empty Element from DTD definition
*/
if ((info != NULL) && (info->empty)) {
if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL))
ctxt->sax->endElement(ctxt->userData, name);
htmlnamePop(ctxt);
}
ctxt->instate = XML_PARSER_CONTENT;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: entering CONTENT\n");
#endif
break;
}
case XML_PARSER_CONTENT: {
long cons;
/*
* Handle preparsed entities and charRef
*/
if (ctxt->token != 0) {
xmlChar chr[2] = { 0 , 0 } ;
chr[0] = (xmlChar) ctxt->token;
htmlCheckParagraph(ctxt);
if ((ctxt->sax != NULL) && (ctxt->sax->characters != NULL))
ctxt->sax->characters(ctxt->userData, chr, 1);
ctxt->token = 0;
ctxt->checkIndex = 0;
}
if ((avail == 1) && (terminate)) {
cur = in->cur[0];
if ((cur != '<') && (cur != '&')) {
if (ctxt->sax != NULL) {
if (IS_BLANK_CH(cur)) {
if (ctxt->sax->ignorableWhitespace != NULL)
ctxt->sax->ignorableWhitespace(
ctxt->userData, &cur, 1);
} else {
htmlCheckParagraph(ctxt);
if (ctxt->sax->characters != NULL)
ctxt->sax->characters(
ctxt->userData, &cur, 1);
}
}
ctxt->token = 0;
ctxt->checkIndex = 0;
in->cur++;
break;
}
}
if (avail < 2)
goto done;
cur = in->cur[0];
next = in->cur[1];
cons = ctxt->nbChars;
if ((xmlStrEqual(ctxt->name, BAD_CAST"script")) ||
(xmlStrEqual(ctxt->name, BAD_CAST"style"))) {
/*
* Handle SCRIPT/STYLE separately
*/
if ((!terminate) &&
(htmlParseLookupSequence(ctxt, '<', '/', 0, 0) < 0))
goto done;
htmlParseScript(ctxt);
if ((cur == '<') && (next == '/')) {
ctxt->instate = XML_PARSER_END_TAG;
ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: entering END_TAG\n");
#endif
break;
}
} else {
/*
* Sometimes DOCTYPE arrives in the middle of the document
*/
if ((cur == '<') && (next == '!') &&
(UPP(2) == 'D') && (UPP(3) == 'O') &&
(UPP(4) == 'C') && (UPP(5) == 'T') &&
(UPP(6) == 'Y') && (UPP(7) == 'P') &&
(UPP(8) == 'E')) {
if ((!terminate) &&
(htmlParseLookupSequence(ctxt, '>', 0, 0, 0) < 0))
goto done;
htmlParseErr(ctxt, XML_HTML_STRUCURE_ERROR,
"Misplaced DOCTYPE declaration\n",
BAD_CAST "DOCTYPE" , NULL);
htmlParseDocTypeDecl(ctxt);
} else if ((cur == '<') && (next == '!') &&
(in->cur[2] == '-') && (in->cur[3] == '-')) {
if ((!terminate) &&
(htmlParseLookupSequence(
ctxt, '-', '-', '>', 1) < 0))
goto done;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: Parsing Comment\n");
#endif
htmlParseComment(ctxt);
ctxt->instate = XML_PARSER_CONTENT;
} else if ((cur == '<') && (next == '?')) {
if ((!terminate) &&
(htmlParseLookupSequence(ctxt, '>', 0, 0, 0) < 0))
goto done;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: Parsing PI\n");
#endif
htmlParsePI(ctxt);
ctxt->instate = XML_PARSER_CONTENT;
} else if ((cur == '<') && (next == '!') && (avail < 4)) {
goto done;
} else if ((cur == '<') && (next == '/')) {
ctxt->instate = XML_PARSER_END_TAG;
ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: entering END_TAG\n");
#endif
break;
} else if (cur == '<') {
ctxt->instate = XML_PARSER_START_TAG;
ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: entering START_TAG\n");
#endif
break;
} else if (cur == '&') {
if ((!terminate) &&
(htmlParseLookupSequence(ctxt, ';', 0, 0, 0) < 0))
goto done;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: Parsing Reference\n");
#endif
/* TODO: check generation of subtrees if noent !!! */
htmlParseReference(ctxt);
} else {
/*
* check that the text sequence is complete
* before handing out the data to the parser
* to avoid problems with erroneous end of
* data detection.
*/
if ((!terminate) &&
(htmlParseLookupSequence(ctxt, '<', 0, 0, 0) < 0))
goto done;
ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: Parsing char data\n");
#endif
htmlParseCharData(ctxt);
}
}
if (cons == ctxt->nbChars) {
if (ctxt->node != NULL) {
htmlParseErr(ctxt, XML_ERR_INTERNAL_ERROR,
"detected an error in element content\n",
NULL, NULL);
}
NEXT;
break;
}
break;
}
case XML_PARSER_END_TAG:
if (avail < 2)
goto done;
if ((!terminate) &&
(htmlParseLookupSequence(ctxt, '>', 0, 0, 0) < 0))
goto done;
htmlParseEndTag(ctxt);
if (ctxt->nameNr == 0) {
ctxt->instate = XML_PARSER_EPILOG;
} else {
ctxt->instate = XML_PARSER_CONTENT;
}
ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: entering CONTENT\n");
#endif
break;
case XML_PARSER_CDATA_SECTION:
htmlParseErr(ctxt, XML_ERR_INTERNAL_ERROR,
"HPP: internal error, state == CDATA\n",
NULL, NULL);
ctxt->instate = XML_PARSER_CONTENT;
ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: entering CONTENT\n");
#endif
break;
case XML_PARSER_DTD:
htmlParseErr(ctxt, XML_ERR_INTERNAL_ERROR,
"HPP: internal error, state == DTD\n",
NULL, NULL);
ctxt->instate = XML_PARSER_CONTENT;
ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: entering CONTENT\n");
#endif
break;
case XML_PARSER_COMMENT:
htmlParseErr(ctxt, XML_ERR_INTERNAL_ERROR,
"HPP: internal error, state == COMMENT\n",
NULL, NULL);
ctxt->instate = XML_PARSER_CONTENT;
ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: entering CONTENT\n");
#endif
break;
case XML_PARSER_PI:
htmlParseErr(ctxt, XML_ERR_INTERNAL_ERROR,
"HPP: internal error, state == PI\n",
NULL, NULL);
ctxt->instate = XML_PARSER_CONTENT;
ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: entering CONTENT\n");
#endif
break;
case XML_PARSER_ENTITY_DECL:
htmlParseErr(ctxt, XML_ERR_INTERNAL_ERROR,
"HPP: internal error, state == ENTITY_DECL\n",
NULL, NULL);
ctxt->instate = XML_PARSER_CONTENT;
ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: entering CONTENT\n");
#endif
break;
case XML_PARSER_ENTITY_VALUE:
htmlParseErr(ctxt, XML_ERR_INTERNAL_ERROR,
"HPP: internal error, state == ENTITY_VALUE\n",
NULL, NULL);
ctxt->instate = XML_PARSER_CONTENT;
ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: entering DTD\n");
#endif
break;
case XML_PARSER_ATTRIBUTE_VALUE:
htmlParseErr(ctxt, XML_ERR_INTERNAL_ERROR,
"HPP: internal error, state == ATTRIBUTE_VALUE\n",
NULL, NULL);
ctxt->instate = XML_PARSER_START_TAG;
ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: entering START_TAG\n");
#endif
break;
case XML_PARSER_SYSTEM_LITERAL:
htmlParseErr(ctxt, XML_ERR_INTERNAL_ERROR,
"HPP: internal error, state == XML_PARSER_SYSTEM_LITERAL\n",
NULL, NULL);
ctxt->instate = XML_PARSER_CONTENT;
ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: entering CONTENT\n");
#endif
break;
case XML_PARSER_IGNORE:
htmlParseErr(ctxt, XML_ERR_INTERNAL_ERROR,
"HPP: internal error, state == XML_PARSER_IGNORE\n",
NULL, NULL);
ctxt->instate = XML_PARSER_CONTENT;
ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: entering CONTENT\n");
#endif
break;
case XML_PARSER_PUBLIC_LITERAL:
htmlParseErr(ctxt, XML_ERR_INTERNAL_ERROR,
"HPP: internal error, state == XML_PARSER_LITERAL\n",
NULL, NULL);
ctxt->instate = XML_PARSER_CONTENT;
ctxt->checkIndex = 0;
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext,
"HPP: entering CONTENT\n");
#endif
break;
}
}
done:
if ((avail == 0) && (terminate)) {
htmlAutoCloseOnEnd(ctxt);
if ((ctxt->nameNr == 0) && (ctxt->instate != XML_PARSER_EOF)) {
/*
* SAX: end of the document processing.
*/
ctxt->instate = XML_PARSER_EOF;
if ((ctxt->sax) && (ctxt->sax->endDocument != NULL))
ctxt->sax->endDocument(ctxt->userData);
}
}
if ((ctxt->myDoc != NULL) &&
((terminate) || (ctxt->instate == XML_PARSER_EOF) ||
(ctxt->instate == XML_PARSER_EPILOG))) {
xmlDtdPtr dtd;
dtd = xmlGetIntSubset(ctxt->myDoc);
if (dtd == NULL)
ctxt->myDoc->intSubset =
xmlCreateIntSubset(ctxt->myDoc, BAD_CAST "html",
BAD_CAST "-//W3C//DTD HTML 4.0 Transitional//EN",
BAD_CAST "http://www.w3.org/TR/REC-html40/loose.dtd");
}
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext, "HPP: done %d\n", ret);
#endif
return(ret);
}
/**
* htmlParseChunk:
* @ctxt: an HTML parser context
* @chunk: an char array
* @size: the size in byte of the chunk
* @terminate: last chunk indicator
*
* Parse a Chunk of memory
*
* Returns zero if no error, the xmlParserErrors otherwise.
*/
int
htmlParseChunk(htmlParserCtxtPtr ctxt, const char *chunk, int size,
int terminate) {
if ((ctxt == NULL) || (ctxt->input == NULL)) {
htmlParseErr(ctxt, XML_ERR_INTERNAL_ERROR,
"htmlParseChunk: context error\n", NULL, NULL);
return(XML_ERR_INTERNAL_ERROR);
}
if ((size > 0) && (chunk != NULL) && (ctxt->input != NULL) &&
(ctxt->input->buf != NULL) && (ctxt->instate != XML_PARSER_EOF)) {
int base = ctxt->input->base - ctxt->input->buf->buffer->content;
int cur = ctxt->input->cur - ctxt->input->base;
int res;
res = xmlParserInputBufferPush(ctxt->input->buf, size, chunk);
if (res < 0) {
ctxt->errNo = XML_PARSER_EOF;
ctxt->disableSAX = 1;
return (XML_PARSER_EOF);
}
ctxt->input->base = ctxt->input->buf->buffer->content + base;
ctxt->input->cur = ctxt->input->base + cur;
ctxt->input->end =
&ctxt->input->buf->buffer->content[ctxt->input->buf->buffer->use];
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext, "HPP: pushed %d\n", size);
#endif
#if 0
if ((terminate) || (ctxt->input->buf->buffer->use > 80))
htmlParseTryOrFinish(ctxt, terminate);
#endif
} else if (ctxt->instate != XML_PARSER_EOF) {
if ((ctxt->input != NULL) && ctxt->input->buf != NULL) {
xmlParserInputBufferPtr in = ctxt->input->buf;
if ((in->encoder != NULL) && (in->buffer != NULL) &&
(in->raw != NULL)) {
int nbchars;
nbchars = xmlCharEncInFunc(in->encoder, in->buffer, in->raw);
if (nbchars < 0) {
htmlParseErr(ctxt, XML_ERR_INVALID_ENCODING,
"encoder error\n", NULL, NULL);
return(XML_ERR_INVALID_ENCODING);
}
}
}
}
htmlParseTryOrFinish(ctxt, terminate);
if (terminate) {
if ((ctxt->instate != XML_PARSER_EOF) &&
(ctxt->instate != XML_PARSER_EPILOG) &&
(ctxt->instate != XML_PARSER_MISC)) {
ctxt->errNo = XML_ERR_DOCUMENT_END;
ctxt->wellFormed = 0;
}
if (ctxt->instate != XML_PARSER_EOF) {
if ((ctxt->sax) && (ctxt->sax->endDocument != NULL))
ctxt->sax->endDocument(ctxt->userData);
}
ctxt->instate = XML_PARSER_EOF;
}
return((xmlParserErrors) ctxt->errNo);
}
/************************************************************************
* *
* User entry points *
* *
************************************************************************/
/**
* htmlCreatePushParserCtxt:
* @sax: a SAX handler
* @user_data: The user data returned on SAX callbacks
* @chunk: a pointer to an array of chars
* @size: number of chars in the array
* @filename: an optional file name or URI
* @enc: an optional encoding
*
* Create a parser context for using the HTML parser in push mode
* The value of @filename is used for fetching external entities
* and error/warning reports.
*
* Returns the new parser context or NULL
*/
htmlParserCtxtPtr
htmlCreatePushParserCtxt(htmlSAXHandlerPtr sax, void *user_data,
const char *chunk, int size, const char *filename,
xmlCharEncoding enc) {
htmlParserCtxtPtr ctxt;
htmlParserInputPtr inputStream;
xmlParserInputBufferPtr buf;
xmlInitParser();
buf = xmlAllocParserInputBuffer(enc);
if (buf == NULL) return(NULL);
ctxt = htmlNewParserCtxt();
if (ctxt == NULL) {
xmlFreeParserInputBuffer(buf);
return(NULL);
}
if(enc==XML_CHAR_ENCODING_UTF8 || buf->encoder)
ctxt->charset=XML_CHAR_ENCODING_UTF8;
if (sax != NULL) {
if (ctxt->sax != (xmlSAXHandlerPtr) &htmlDefaultSAXHandler)
xmlFree(ctxt->sax);
ctxt->sax = (htmlSAXHandlerPtr) xmlMalloc(sizeof(htmlSAXHandler));
if (ctxt->sax == NULL) {
xmlFree(buf);
xmlFree(ctxt);
return(NULL);
}
memcpy(ctxt->sax, sax, sizeof(htmlSAXHandler));
if (user_data != NULL)
ctxt->userData = user_data;
}
if (filename == NULL) {
ctxt->directory = NULL;
} else {
ctxt->directory = xmlParserGetDirectory(filename);
}
inputStream = htmlNewInputStream(ctxt);
if (inputStream == NULL) {
xmlFreeParserCtxt(ctxt);
xmlFree(buf);
return(NULL);
}
if (filename == NULL)
inputStream->filename = NULL;
else
inputStream->filename = (char *)
xmlCanonicPath((const xmlChar *) filename);
inputStream->buf = buf;
inputStream->base = inputStream->buf->buffer->content;
inputStream->cur = inputStream->buf->buffer->content;
inputStream->end =
&inputStream->buf->buffer->content[inputStream->buf->buffer->use];
inputPush(ctxt, inputStream);
if ((size > 0) && (chunk != NULL) && (ctxt->input != NULL) &&
(ctxt->input->buf != NULL)) {
int base = ctxt->input->base - ctxt->input->buf->buffer->content;
int cur = ctxt->input->cur - ctxt->input->base;
xmlParserInputBufferPush(ctxt->input->buf, size, chunk);
ctxt->input->base = ctxt->input->buf->buffer->content + base;
ctxt->input->cur = ctxt->input->base + cur;
ctxt->input->end =
&ctxt->input->buf->buffer->content[ctxt->input->buf->buffer->use];
#ifdef DEBUG_PUSH
xmlGenericError(xmlGenericErrorContext, "HPP: pushed %d\n", size);
#endif
}
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.
*
* 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(xmlChar *cur, const char *encoding, htmlSAXHandlerPtr sax, void *userData) {
htmlDocPtr ret;
htmlParserCtxtPtr ctxt;
xmlInitParser();
if (cur == NULL) return(NULL);
ctxt = htmlCreateDocParserCtxt(cur, encoding);
if (ctxt == NULL) return(NULL);
if (sax != NULL) {
if (ctxt->sax != NULL) xmlFree (ctxt->sax);
ctxt->sax = sax;
ctxt->userData = userData;
}
htmlParseDocument(ctxt);
ret = ctxt->myDoc;
if (sax != NULL) {
ctxt->sax = NULL;
ctxt->userData = NULL;
}
htmlFreeParserCtxt(ctxt);
return(ret);
}
/**
* htmlParseDoc:
* @cur: a pointer to an array of xmlChar
* @encoding: a free form C string describing the HTML document encoding, or NULL
*
* parse an HTML in-memory document and build a tree.
*
* Returns the resulting document tree
*/
htmlDocPtr
htmlParseDoc(xmlChar *cur, const char *encoding) {
return(htmlSAXParseDoc(cur, encoding, NULL, NULL));
}
/**
* htmlCreateFileParserCtxt:
* @filename: the filename
* @encoding: a free form C string describing the HTML document encoding, or NULL
*
* Create a parser context for a file content.
* Automatic support for ZLIB/Compress compressed document is provided
* by default if found at compile-time.
*
* Returns the new parser context or NULL
*/
htmlParserCtxtPtr
htmlCreateFileParserCtxt(const char *filename, const char *encoding)
{
htmlParserCtxtPtr ctxt;
htmlParserInputPtr inputStream;
char *canonicFilename;
/* htmlCharEncoding enc; */
xmlChar *content, *content_line = (xmlChar *) "charset=";
if (filename == NULL)
return(NULL);
ctxt = htmlNewParserCtxt();
if (ctxt == NULL) {
return(NULL);
}
canonicFilename = (char *) xmlCanonicPath((const xmlChar *) filename);
if (canonicFilename == NULL) {
#ifdef LIBXML_SAX1_ENABLED
if (xmlDefaultSAXHandler.error != NULL) {
xmlDefaultSAXHandler.error(NULL, "out of memory\n");
}
#endif
xmlFreeParserCtxt(ctxt);
return(NULL);
}
inputStream = xmlLoadExternalEntity(canonicFilename, NULL, ctxt);
xmlFree(canonicFilename);
if (inputStream == NULL) {
xmlFreeParserCtxt(ctxt);
return(NULL);
}
inputPush(ctxt, inputStream);
/* set encoding */
if (encoding) {
content = xmlMallocAtomic (xmlStrlen(content_line) + strlen(encoding) + 1);
if (content) {
strcpy ((char *)content, (char *)content_line);
strcat ((char *)content, (char *)encoding);
htmlCheckEncoding (ctxt, content);
xmlFree (content);
}
}
return(ctxt);
}
/**
* htmlSAXParseFile:
* @filename: the filename
* @encoding: a free form C string describing the HTML document encoding, or NULL
* @sax: the SAX handler block
* @userData: if using SAX, this pointer will be provided on callbacks.
*
* parse an HTML file and build a tree. Automatic support for ZLIB/Compress
* compressed document is provided by default if found at compile-time.
* It use the given SAX function block to handle the parsing callback.
* If sax is NULL, fallback to the default DOM tree building routines.
*
* Returns the resulting document tree 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;
xmlInitParser();
ctxt = htmlCreateFileParserCtxt(filename, encoding);
if (ctxt == NULL) return(NULL);
if (sax != NULL) {
oldsax = ctxt->sax;
ctxt->sax = sax;
ctxt->userData = userData;
}
htmlParseDocument(ctxt);
ret = ctxt->myDoc;
if (sax != NULL) {
ctxt->sax = oldsax;
ctxt->userData = NULL;
}
htmlFreeParserCtxt(ctxt);
return(ret);
}
/**
* htmlParseFile:
* @filename: the filename
* @encoding: a free form C string describing the HTML document encoding, or NULL
*
* parse an HTML file and build a tree. Automatic support for ZLIB/Compress
* compressed document is provided by default if found at compile-time.
*
* Returns the resulting document tree
*/
htmlDocPtr
htmlParseFile(const char *filename, const char *encoding) {
return(htmlSAXParseFile(filename, encoding, NULL, NULL));
}
/**
* htmlHandleOmittedElem:
* @val: int 0 or 1
*
* 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
*
* Checks whether an HTML element may be a direct child of a parent element.
* Note - doesn't check for deprecated elements
*
* Returns 1 if allowed; 0 otherwise.
*/
int
htmlElementAllowedHere(const htmlElemDesc* parent, const xmlChar* elt) {
const char** p ;
if ( ! elt || ! parent || ! parent->subelts )
return 0 ;
for ( p = parent->subelts; *p; ++p )
if ( !xmlStrcmp((const xmlChar *)*p, elt) )
return 1 ;
return 0 ;
}
/**
* htmlElementStatusHere:
* @parent: HTML parent element
* @elt: HTML element
*
* Checks whether an HTML element may be a direct child of a parent element.
* and if so whether it is valid or deprecated.
*
* Returns one of HTML_VALID, HTML_DEPRECATED, HTML_INVALID
*/
htmlStatus
htmlElementStatusHere(const htmlElemDesc* parent, const htmlElemDesc* elt) {
if ( ! parent || ! elt )
return HTML_INVALID ;
if ( ! htmlElementAllowedHere(parent, (const xmlChar*) elt->name ) )
return HTML_INVALID ;
return ( elt->dtd == 0 ) ? HTML_VALID : HTML_DEPRECATED ;
}
/**
* htmlAttrAllowed:
* @elt: HTML element
* @attr: HTML attribute
* @legacy: whether to allow deprecated attributes
*
* Checks whether an attribute is valid for an element
* Has full knowledge of Required and Deprecated attributes
*
* Returns one of HTML_REQUIRED, HTML_VALID, HTML_DEPRECATED, HTML_INVALID
*/
htmlStatus
htmlAttrAllowed(const htmlElemDesc* elt, const xmlChar* attr, int legacy) {
const char** p ;
if ( !elt || ! attr )
return HTML_INVALID ;
if ( elt->attrs_req )
for ( p = elt->attrs_req; *p; ++p)
if ( !xmlStrcmp((const xmlChar*)*p, attr) )
return HTML_REQUIRED ;
if ( elt->attrs_opt )
for ( p = elt->attrs_opt; *p; ++p)
if ( !xmlStrcmp((const xmlChar*)*p, attr) )
return HTML_VALID ;
if ( legacy && elt->attrs_depr )
for ( p = elt->attrs_depr; *p; ++p)
if ( !xmlStrcmp((const xmlChar*)*p, attr) )
return HTML_DEPRECATED ;
return HTML_INVALID ;
}
/**
* htmlNodeStatus:
* @node: an htmlNodePtr in a tree
* @legacy: whether to allow deprecated elements (YES is faster here
* for Element nodes)
*
* Checks whether the tree node is valid. Experimental (the author
* only uses the HTML enhancements in a SAX parser)
*
* Return: for Element nodes, a return from htmlElementAllowedHere (if
* legacy allowed) or htmlElementStatusHere (otherwise).
* for Attribute nodes, a return from htmlAttrAllowed
* for other nodes, HTML_NA (no checks performed)
*/
htmlStatus
htmlNodeStatus(const htmlNodePtr node, int legacy) {
if ( ! node )
return HTML_INVALID ;
switch ( node->type ) {
case XML_ELEMENT_NODE:
return legacy
? ( htmlElementAllowedHere (
htmlTagLookup(node->parent->name) , node->name
) ? HTML_VALID : HTML_INVALID )
: htmlElementStatusHere(
htmlTagLookup(node->parent->name) ,
htmlTagLookup(node->name) )
;
case XML_ATTRIBUTE_NODE:
return htmlAttrAllowed(
htmlTagLookup(node->parent->name) , node->name, legacy) ;
default: return HTML_NA ;
}
}
/************************************************************************
* *
* 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" dictionnary 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 = inputPop(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;
DICT_FREE(ctxt->version);
ctxt->version = NULL;
DICT_FREE(ctxt->encoding);
ctxt->encoding = NULL;
DICT_FREE(ctxt->directory);
ctxt->directory = NULL;
DICT_FREE(ctxt->extSubURI);
ctxt->extSubURI = NULL;
DICT_FREE(ctxt->extSubSystem);
ctxt->extSubSystem = NULL;
if (ctxt->myDoc != NULL)
xmlFreeDoc(ctxt->myDoc);
ctxt->myDoc = NULL;
ctxt->standalone = -1;
ctxt->hasExternalSubset = 0;
ctxt->hasPErefs = 0;
ctxt->html = 1;
ctxt->external = 0;
ctxt->instate = XML_PARSER_START;
ctxt->token = 0;
ctxt->wellFormed = 1;
ctxt->nsWellFormed = 1;
ctxt->valid = 1;
ctxt->vctxt.userData = ctxt;
ctxt->vctxt.error = xmlParserValidityError;
ctxt->vctxt.warning = xmlParserValidityWarning;
ctxt->record_info = 0;
ctxt->nbChars = 0;
ctxt->checkIndex = 0;
ctxt->inSubset = 0;
ctxt->errNo = XML_ERR_OK;
ctxt->depth = 0;
ctxt->charset = XML_CHAR_ENCODING_UTF8;
ctxt->catalogs = NULL;
xmlInitNodeInfoSeq(&ctxt->node_seq);
if (ctxt->attsDefault != NULL) {
xmlHashFree(ctxt->attsDefault, (xmlHashDeallocator) xmlFree);
ctxt->attsDefault = NULL;
}
if (ctxt->attsSpecial != NULL) {
xmlHashFree(ctxt->attsSpecial, NULL);
ctxt->attsSpecial = NULL;
}
}
/**
* htmlCtxtUseOptions:
* @ctxt: an HTML parser context
* @options: a combination of htmlParserOption(s)
*
* Applies the options to the parser context
*
* Returns 0 in case of success, the set of unknown or unimplemented options
* in case of error.
*/
int
htmlCtxtUseOptions(htmlParserCtxtPtr ctxt, int options)
{
if (ctxt == NULL)
return(-1);
if (options & HTML_PARSE_NOWARNING) {
ctxt->sax->warning = NULL;
ctxt->vctxt.warning = NULL;
options -= XML_PARSE_NOWARNING;
ctxt->options |= XML_PARSE_NOWARNING;
}
if (options & HTML_PARSE_NOERROR) {
ctxt->sax->error = NULL;
ctxt->vctxt.error = NULL;
ctxt->sax->fatalError = NULL;
options -= XML_PARSE_NOERROR;
ctxt->options |= XML_PARSE_NOERROR;
}
if (options & HTML_PARSE_PEDANTIC) {
ctxt->pedantic = 1;
options -= XML_PARSE_PEDANTIC;
ctxt->options |= XML_PARSE_PEDANTIC;
} else
ctxt->pedantic = 0;
if (options & XML_PARSE_NOBLANKS) {
ctxt->keepBlanks = 0;
ctxt->sax->ignorableWhitespace = xmlSAX2IgnorableWhitespace;
options -= XML_PARSE_NOBLANKS;
ctxt->options |= XML_PARSE_NOBLANKS;
} else
ctxt->keepBlanks = 1;
if (options & HTML_PARSE_RECOVER) {
ctxt->recovery = 1;
} else
ctxt->recovery = 0;
if (options & HTML_PARSE_COMPACT) {
ctxt->options |= HTML_PARSE_COMPACT;
options -= HTML_PARSE_COMPACT;
}
ctxt->dictNames = 0;
return (options);
}
/**
* htmlDoRead:
* @ctxt: an HTML parser context
* @URL: the base URL to use for the document
* @encoding: the document encoding, or NULL
* @options: a combination of htmlParserOption(s)
* @reuse: keep the context for reuse
*
* Common front-end for the htmlRead functions
*
* Returns the resulting document tree or NULL
*/
static htmlDocPtr
htmlDoRead(htmlParserCtxtPtr ctxt, const char *URL, const char *encoding,
int options, int reuse)
{
htmlDocPtr ret;
htmlCtxtUseOptions(ctxt, options);
ctxt->html = 1;
if (encoding != NULL) {
xmlCharEncodingHandlerPtr hdlr;
hdlr = xmlFindCharEncodingHandler(encoding);
if (hdlr != NULL)
xmlSwitchToEncoding(ctxt, hdlr);
}
if ((URL != NULL) && (ctxt->input != NULL) &&
(ctxt->input->filename == NULL))
ctxt->input->filename = (char *) xmlStrdup((const xmlChar *) URL);
htmlParseDocument(ctxt);
ret = ctxt->myDoc;
ctxt->myDoc = NULL;
if (!reuse) {
if ((ctxt->dictNames) &&
(ret != NULL) &&
(ret->dict == ctxt->dict))
ctxt->dict = NULL;
xmlFreeParserCtxt(ctxt);
}
return (ret);
}
/**
* htmlReadDoc:
* @cur: a pointer to a zero terminated string
* @URL: the base URL to use for the document
* @encoding: the document encoding, or NULL
* @options: a combination of htmlParserOption(s)
*
* parse an XML in-memory document and build a tree.
*
* Returns the resulting document tree
*/
htmlDocPtr
htmlReadDoc(const xmlChar * cur, const char *URL, const char *encoding, int options)
{
htmlParserCtxtPtr ctxt;
if (cur == NULL)
return (NULL);
ctxt = xmlCreateDocParserCtxt(cur);
if (ctxt == NULL)
return (NULL);
return (htmlDoRead(ctxt, URL, encoding, options, 0));
}
/**
* htmlReadFile:
* @filename: a file or URL
* @encoding: the document encoding, or NULL
* @options: a combination of htmlParserOption(s)
*
* parse an XML file from the filesystem or the network.
*
* Returns the resulting document tree
*/
htmlDocPtr
htmlReadFile(const char *filename, const char *encoding, int options)
{
htmlParserCtxtPtr ctxt;
ctxt = htmlCreateFileParserCtxt(filename, encoding);
if (ctxt == NULL)
return (NULL);
return (htmlDoRead(ctxt, NULL, NULL, options, 0));
}
/**
* htmlReadMemory:
* @buffer: a pointer to a char array
* @size: the size of the array
* @URL: the base URL to use for the document
* @encoding: the document encoding, or NULL
* @options: a combination of htmlParserOption(s)
*
* parse an XML in-memory document and build a tree.
*
* Returns the resulting document tree
*/
htmlDocPtr
htmlReadMemory(const char *buffer, int size, const char *URL, const char *encoding, int options)
{
htmlParserCtxtPtr ctxt;
ctxt = xmlCreateMemoryParserCtxt(buffer, size);
if (ctxt == NULL)
return (NULL);
if (ctxt->sax != NULL)
memcpy(ctxt->sax, &htmlDefaultSAXHandler, sizeof(xmlSAXHandlerV1));
return (htmlDoRead(ctxt, URL, encoding, options, 0));
}
/**
* htmlReadFd:
* @fd: an open file descriptor
* @URL: the base URL to use for the document
* @encoding: the document encoding, or NULL
* @options: a combination of htmlParserOption(s)
*
* parse an XML from a file descriptor and build a tree.
*
* Returns the resulting document tree
*/
htmlDocPtr
htmlReadFd(int fd, const char *URL, const char *encoding, int options)
{
htmlParserCtxtPtr ctxt;
xmlParserInputBufferPtr input;
xmlParserInputPtr stream;
if (fd < 0)
return (NULL);
input = xmlParserInputBufferCreateFd(fd, XML_CHAR_ENCODING_NONE);
if (input == NULL)
return (NULL);
ctxt = xmlNewParserCtxt();
if (ctxt == NULL) {
xmlFreeParserInputBuffer(input);
return (NULL);
}
stream = xmlNewIOInputStream(ctxt, input, XML_CHAR_ENCODING_NONE);
if (stream == NULL) {
xmlFreeParserInputBuffer(input);
xmlFreeParserCtxt(ctxt);
return (NULL);
}
inputPush(ctxt, stream);
return (htmlDoRead(ctxt, URL, encoding, options, 0));
}
/**
* htmlReadIO:
* @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.
*
* Returns the resulting document tree
*/
htmlDocPtr
htmlReadIO(xmlInputReadCallback ioread, xmlInputCloseCallback ioclose,
void *ioctx, const char *URL, const char *encoding, int options)
{
htmlParserCtxtPtr ctxt;
xmlParserInputBufferPtr input;
xmlParserInputPtr stream;
if (ioread == NULL)
return (NULL);
input = xmlParserInputBufferCreateIO(ioread, ioclose, ioctx,
XML_CHAR_ENCODING_NONE);
if (input == NULL)
return (NULL);
ctxt = xmlNewParserCtxt();
if (ctxt == NULL) {
xmlFreeParserInputBuffer(input);
return (NULL);
}
stream = xmlNewIOInputStream(ctxt, input, XML_CHAR_ENCODING_NONE);
if (stream == NULL) {
xmlFreeParserInputBuffer(input);
xmlFreeParserCtxt(ctxt);
return (NULL);
}
inputPush(ctxt, stream);
return (htmlDoRead(ctxt, URL, encoding, options, 0));
}
/**
* htmlCtxtReadDoc:
* @ctxt: an HTML parser context
* @cur: a pointer to a zero terminated string
* @URL: the base URL to use for the document
* @encoding: the document encoding, or NULL
* @options: a combination of htmlParserOption(s)
*
* parse an XML in-memory document and build a tree.
* This reuses the existing @ctxt parser context
*
* Returns the resulting document tree
*/
htmlDocPtr
htmlCtxtReadDoc(htmlParserCtxtPtr ctxt, const xmlChar * cur,
const char *URL, const char *encoding, int options)
{
xmlParserInputPtr stream;
if (cur == NULL)
return (NULL);
if (ctxt == NULL)
return (NULL);
htmlCtxtReset(ctxt);
stream = xmlNewStringInputStream(ctxt, cur);
if (stream == NULL) {
return (NULL);
}
inputPush(ctxt, stream);
return (htmlDoRead(ctxt, URL, encoding, options, 1));
}
/**
* htmlCtxtReadFile:
* @ctxt: an HTML parser context
* @filename: a file or URL
* @encoding: the document encoding, or NULL
* @options: a combination of htmlParserOption(s)
*
* parse an XML file from the filesystem or the network.
* This reuses the existing @ctxt parser context
*
* Returns the resulting document tree
*/
htmlDocPtr
htmlCtxtReadFile(htmlParserCtxtPtr ctxt, const char *filename,
const char *encoding, int options)
{
xmlParserInputPtr stream;
if (filename == NULL)
return (NULL);
if (ctxt == NULL)
return (NULL);
htmlCtxtReset(ctxt);
stream = xmlLoadExternalEntity(filename, NULL, ctxt);
if (stream == NULL) {
return (NULL);
}
inputPush(ctxt, stream);
return (htmlDoRead(ctxt, NULL, encoding, options, 1));
}
/**
* htmlCtxtReadMemory:
* @ctxt: an HTML parser context
* @buffer: a pointer to a char array
* @size: the size of the array
* @URL: the base URL to use for the document
* @encoding: the document encoding, or NULL
* @options: a combination of htmlParserOption(s)
*
* parse an XML in-memory document and build a tree.
* This reuses the existing @ctxt parser context
*
* Returns the resulting document tree
*/
htmlDocPtr
htmlCtxtReadMemory(htmlParserCtxtPtr ctxt, const char *buffer, int size,
const char *URL, const char *encoding, int options)
{
xmlParserInputBufferPtr input;
xmlParserInputPtr stream;
if (ctxt == NULL)
return (NULL);
if (buffer == NULL)
return (NULL);
htmlCtxtReset(ctxt);
input = xmlParserInputBufferCreateMem(buffer, size, XML_CHAR_ENCODING_NONE);
if (input == NULL) {
return(NULL);
}
stream = xmlNewIOInputStream(ctxt, input, XML_CHAR_ENCODING_NONE);
if (stream == NULL) {
xmlFreeParserInputBuffer(input);
return(NULL);
}
inputPush(ctxt, stream);
return (htmlDoRead(ctxt, URL, encoding, options, 1));
}
/**
* htmlCtxtReadFd:
* @ctxt: an HTML parser context
* @fd: an open file descriptor
* @URL: the base URL to use for the document
* @encoding: the document encoding, or NULL
* @options: a combination of htmlParserOption(s)
*
* parse an XML from a file descriptor and build a tree.
* This reuses the existing @ctxt parser context
*
* Returns the resulting document tree
*/
htmlDocPtr
htmlCtxtReadFd(htmlParserCtxtPtr ctxt, int fd,
const char *URL, const char *encoding, int options)
{
xmlParserInputBufferPtr input;
xmlParserInputPtr stream;
if (fd < 0)
return (NULL);
if (ctxt == NULL)
return (NULL);
htmlCtxtReset(ctxt);
input = xmlParserInputBufferCreateFd(fd, XML_CHAR_ENCODING_NONE);
if (input == NULL)
return (NULL);
stream = xmlNewIOInputStream(ctxt, input, XML_CHAR_ENCODING_NONE);
if (stream == NULL) {
xmlFreeParserInputBuffer(input);
return (NULL);
}
inputPush(ctxt, stream);
return (htmlDoRead(ctxt, URL, encoding, options, 1));
}
/**
* 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.
* This reuses the existing @ctxt parser context
*
* Returns the resulting document tree
*/
htmlDocPtr
htmlCtxtReadIO(htmlParserCtxtPtr ctxt, xmlInputReadCallback ioread,
xmlInputCloseCallback ioclose, void *ioctx,
const char *URL,
const char *encoding, int options)
{
xmlParserInputBufferPtr input;
xmlParserInputPtr stream;
if (ioread == NULL)
return (NULL);
if (ctxt == NULL)
return (NULL);
htmlCtxtReset(ctxt);
input = xmlParserInputBufferCreateIO(ioread, ioclose, ioctx,
XML_CHAR_ENCODING_NONE);
if (input == NULL)
return (NULL);
stream = xmlNewIOInputStream(ctxt, input, XML_CHAR_ENCODING_NONE);
if (stream == NULL) {
xmlFreeParserInputBuffer(input);
return (NULL);
}
inputPush(ctxt, stream);
return (htmlDoRead(ctxt, URL, encoding, options, 1));
}
#define bottom_HTMLparser
#include "elfgcchack.h"
#endif /* LIBXML_HTML_ENABLED */