diff --git "a/local-test-libxml2-delta-02/afc-libxml2/HTMLparser.c" "b/local-test-libxml2-delta-02/afc-libxml2/HTMLparser.c" new file mode 100644--- /dev/null +++ "b/local-test-libxml2-delta-02/afc-libxml2/HTMLparser.c" @@ -0,0 +1,6315 @@ +/* + * HTMLparser.c : an HTML parser + * + * References: + * HTML Living Standard + * https://html.spec.whatwg.org/multipage/parsing.html + * + * Tokenization now conforms to HTML5. Tree construction still follows + * a custom, non-standard implementation. See: + * + * https://gitlab.gnome.org/GNOME/libxml2/-/issues/211 + * + * See Copyright for the status of this software. + * + * daniel@veillard.com + */ + +#define IN_LIBXML +#include "libxml.h" +#ifdef LIBXML_HTML_ENABLED + +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "private/buf.h" +#include "private/dict.h" +#include "private/enc.h" +#include "private/error.h" +#include "private/html.h" +#include "private/io.h" +#include "private/memory.h" +#include "private/parser.h" +#include "private/tree.h" + +#define HTML_MAX_NAMELEN 1000 +#define HTML_MAX_ATTRS 100000000 /* 100 million */ +#define HTML_PARSER_BIG_BUFFER_SIZE 1000 +#define HTML_PARSER_BUFFER_SIZE 100 + +#define IS_WS_HTML(c) \ + (((c) == 0x20) || \ + (((c) >= 0x09) && ((c) <= 0x0D) && ((c) != 0x0B))) + +#define IS_HEX_DIGIT(c) \ + ((IS_ASCII_DIGIT(c)) || \ + ((((c) | 0x20) >= 'a') && (((c) | 0x20) <= 'f'))) + +#define IS_UPPER(c) \ + (((c) >= 'A') && ((c) <= 'Z')) + +#define IS_ALNUM(c) \ + (IS_ASCII_LETTER(c) || IS_ASCII_DIGIT(c)) + +typedef const unsigned htmlAsciiMask[2]; + +static htmlAsciiMask MASK_DQ = { + 0, + 1u << ('"' - 32), +}; +static htmlAsciiMask MASK_SQ = { + 0, + 1u << ('\'' - 32), +}; +static htmlAsciiMask MASK_GT = { + 0, + 1u << ('>' - 32), +}; +static htmlAsciiMask MASK_DASH = { + 0, + 1u << ('-' - 32), +}; +static htmlAsciiMask MASK_WS_GT = { + 1u << 0x09 | 1u << 0x0A | 1u << 0x0C | 1u << 0x0D, + 1u << (' ' - 32) | 1u << ('>' - 32), +}; +static htmlAsciiMask MASK_DQ_GT = { + 0, + 1u << ('"' - 32) | 1u << ('>' - 32), +}; +static htmlAsciiMask MASK_SQ_GT = { + 0, + 1u << ('\'' - 32) | 1u << ('>' - 32), +}; + +static int htmlOmittedDefaultValue = 1; + +static int +htmlParseElementInternal(htmlParserCtxtPtr ctxt); + +/************************************************************************ + * * + * Some factorized error routines * + * * + ************************************************************************/ + +/** + * htmlErrMemory: + * @ctxt: an HTML parser context + * @extra: extra information + * + * Handle a redefinition of attribute error + */ +static void +htmlErrMemory(xmlParserCtxtPtr ctxt) +{ + xmlCtxtErrMemory(ctxt); +} + +/** + * htmlParseErr: + * @ctxt: an HTML parser context + * @error: the error number + * @msg: the error message + * @str1: string infor + * @str2: string infor + * + * Handle a fatal parser error, i.e. violating Well-Formedness constraints + */ +static void LIBXML_ATTR_FORMAT(3,0) +htmlParseErr(xmlParserCtxtPtr ctxt, xmlParserErrors error, + const char *msg, const xmlChar *str1, const xmlChar *str2) +{ + xmlCtxtErr(ctxt, NULL, XML_FROM_HTML, error, XML_ERR_ERROR, + str1, str2, NULL, 0, msg, str1, str2); +} + +/************************************************************************ + * * + * Parser stacks related functions and macros * + * * + ************************************************************************/ + +/** + * htmlnamePush: + * @ctxt: an HTML parser context + * @value: the element name + * + * Pushes a new element name on top of the name stack + * + * Returns -1 in case of error, the index in the stack otherwise + */ +static int +htmlnamePush(htmlParserCtxtPtr ctxt, const xmlChar * value) +{ + if ((ctxt->html < 3) && (xmlStrEqual(value, BAD_CAST "head"))) + ctxt->html = 3; + if ((ctxt->html < 10) && (xmlStrEqual(value, BAD_CAST "body"))) + ctxt->html = 10; + if (ctxt->nameNr >= ctxt->nameMax) { + const xmlChar **tmp; + int newSize; + + newSize = xmlGrowCapacity(ctxt->nameMax, sizeof(tmp[0]), + 10, XML_MAX_ITEMS); + if (newSize < 0) { + htmlErrMemory(ctxt); + return (-1); + } + tmp = xmlRealloc(ctxt->nameTab, newSize * sizeof(tmp[0])); + if (tmp == NULL) { + htmlErrMemory(ctxt); + return(-1); + } + ctxt->nameTab = tmp; + ctxt->nameMax = newSize; + } + ctxt->nameTab[ctxt->nameNr] = value; + ctxt->name = value; + return (ctxt->nameNr++); +} +/** + * htmlnamePop: + * @ctxt: an HTML parser context + * + * Pops the top element name from the name stack + * + * Returns the name just removed + */ +static const xmlChar * +htmlnamePop(htmlParserCtxtPtr ctxt) +{ + const xmlChar *ret; + + if (ctxt->nameNr <= 0) + return (NULL); + ctxt->nameNr--; + if (ctxt->nameNr < 0) + return (NULL); + if (ctxt->nameNr > 0) + ctxt->name = ctxt->nameTab[ctxt->nameNr - 1]; + else + ctxt->name = NULL; + ret = ctxt->nameTab[ctxt->nameNr]; + ctxt->nameTab[ctxt->nameNr] = NULL; + return (ret); +} + +/** + * htmlNodeInfoPush: + * @ctxt: an HTML parser context + * @value: the node info + * + * Pushes a new element name on top of the node info stack + * + * Returns 0 in case of error, the index in the stack otherwise + */ +static int +htmlNodeInfoPush(htmlParserCtxtPtr ctxt, htmlParserNodeInfo *value) +{ + if (ctxt->nodeInfoNr >= ctxt->nodeInfoMax) { + xmlParserNodeInfo *tmp; + int newSize; + + newSize = xmlGrowCapacity(ctxt->nodeInfoMax, sizeof(tmp[0]), + 5, XML_MAX_ITEMS); + if (newSize < 0) { + htmlErrMemory(ctxt); + return (0); + } + tmp = xmlRealloc(ctxt->nodeInfoTab, newSize * sizeof(tmp[0])); + if (tmp == NULL) { + htmlErrMemory(ctxt); + return (0); + } + ctxt->nodeInfoTab = tmp; + ctxt->nodeInfoMax = newSize; + } + ctxt->nodeInfoTab[ctxt->nodeInfoNr] = *value; + ctxt->nodeInfo = &ctxt->nodeInfoTab[ctxt->nodeInfoNr]; + return (ctxt->nodeInfoNr++); +} + +/** + * htmlNodeInfoPop: + * @ctxt: an HTML parser context + * + * Pops the top element name from the node info stack + * + * Returns 0 in case of error, the pointer to NodeInfo otherwise + */ +static htmlParserNodeInfo * +htmlNodeInfoPop(htmlParserCtxtPtr ctxt) +{ + if (ctxt->nodeInfoNr <= 0) + return (NULL); + ctxt->nodeInfoNr--; + if (ctxt->nodeInfoNr < 0) + return (NULL); + if (ctxt->nodeInfoNr > 0) + ctxt->nodeInfo = &ctxt->nodeInfoTab[ctxt->nodeInfoNr - 1]; + else + ctxt->nodeInfo = NULL; + return &ctxt->nodeInfoTab[ctxt->nodeInfoNr]; +} + +/* + * Macros for accessing the content. Those should be used only by the parser, + * and not exported. + * + * Dirty macros, i.e. one need to make assumption on the context to use them + * + * CUR_PTR return the current pointer to the xmlChar to be parsed. + * CUR returns the current xmlChar value, i.e. a 8 bit value if compiled + * in ISO-Latin or UTF-8, and the current 16 bit value if compiled + * in UNICODE mode. This should be used internally by the parser + * only to compare to ASCII values otherwise it would break when + * running with UTF-8 encoding. + * NXT(n) returns the n'th next xmlChar. Same as CUR is should be used only + * to compare on ASCII based substring. + * UPP(n) returns the n'th next xmlChar converted to uppercase. Same as CUR + * it should be used only to compare on ASCII based substring. + * SKIP(n) Skip n xmlChar, and must also be used only to skip ASCII defined + * strings without newlines within the parser. + * + * Clean macros, not dependent of an ASCII context, expect UTF-8 encoding + * + * COPY(to) copy one char to *to, increment CUR_PTR and to accordingly + */ + +#define UPPER (toupper(*ctxt->input->cur)) + +#define SKIP(val) ctxt->input->cur += (val),ctxt->input->col+=(val) + +#define NXT(val) ctxt->input->cur[(val)] + +#define UPP(val) (toupper(ctxt->input->cur[(val)])) + +#define CUR_PTR ctxt->input->cur +#define BASE_PTR ctxt->input->base + +#define SHRINK \ + if ((!PARSER_PROGRESSIVE(ctxt)) && \ + (ctxt->input->cur - ctxt->input->base > 2 * INPUT_CHUNK) && \ + (ctxt->input->end - ctxt->input->cur < 2 * INPUT_CHUNK)) \ + xmlParserShrink(ctxt); + +#define GROW \ + if ((!PARSER_PROGRESSIVE(ctxt)) && \ + (ctxt->input->end - ctxt->input->cur < INPUT_CHUNK)) \ + xmlParserGrow(ctxt); + +#define SKIP_BLANKS htmlSkipBlankChars(ctxt) + +/* Imported from XML */ + +#define CUR (*ctxt->input->cur) + +/** + * htmlFindEncoding: + * @the HTML parser context + * + * Ty to find and encoding in the current data available in the input + * buffer this is needed to try to switch to the proper encoding when + * one face a character error. + * That's an heuristic, since it's operating outside of parsing it could + * try to use a meta which had been commented out, that's the reason it + * should only be used in case of error, not as a default. + * + * Returns an encoding string or NULL if not found, the string need to + * be freed + */ +static xmlChar * +htmlFindEncoding(xmlParserCtxtPtr ctxt) { + const xmlChar *start, *cur, *end; + xmlChar *ret; + + if ((ctxt == NULL) || (ctxt->input == NULL) || + (ctxt->input->flags & XML_INPUT_HAS_ENCODING)) + return(NULL); + if ((ctxt->input->cur == NULL) || (ctxt->input->end == NULL)) + return(NULL); + + start = ctxt->input->cur; + end = ctxt->input->end; + /* we also expect the input buffer to be zero terminated */ + if (*end != 0) + return(NULL); + + cur = xmlStrcasestr(start, BAD_CAST "HTTP-EQUIV"); + if (cur == NULL) + return(NULL); + cur = xmlStrcasestr(cur, BAD_CAST "CONTENT"); + if (cur == NULL) + return(NULL); + cur = xmlStrcasestr(cur, BAD_CAST "CHARSET="); + if (cur == NULL) + return(NULL); + cur += 8; + start = cur; + while ((IS_ALNUM(*cur)) || + (*cur == '-') || (*cur == '_') || (*cur == ':') || (*cur == '/')) + cur++; + if (cur == start) + return(NULL); + ret = xmlStrndup(start, cur - start); + if (ret == NULL) + htmlErrMemory(ctxt); + return(ret); +} + +static int +htmlMaskMatch(htmlAsciiMask mask, unsigned c) { + if (c >= 64) + return(0); + return((mask[c/32] >> (c & 31)) & 1); +} + +static int +htmlValidateUtf8(xmlParserCtxtPtr ctxt, const xmlChar *str, size_t len) { + unsigned c = str[0]; + int size; + + if (c < 0xC2) { + goto invalid; + } else if (c < 0xE0) { + if (len < 2) + goto incomplete; + if ((str[1] & 0xC0) != 0x80) + goto invalid; + size = 2; + } else if (c < 0xF0) { + unsigned v; + + if (len < 3) + goto incomplete; + + v = str[1] << 8 | str[2]; /* hint to generate 16-bit load */ + v |= c << 16; + + if (((v & 0x00C0C0) != 0x008080) || + ((v & 0x0F2000) == 0x000000) || + ((v & 0x0F2000) == 0x0D2000)) + goto invalid; + + size = 3; + } else { + unsigned v; + + if (len < 4) + goto incomplete; + + v = c << 24 | str[1] << 16 | str[2] << 8 | str[3]; + + if (((v & 0x00C0C0C0) != 0x00808080) || + (v < 0xF0900000) || (v >= 0xF4900000)) + goto invalid; + + size = 4; + } + + return(size); + +incomplete: + return(0); + +invalid: + /* Only report the first error */ + if ((ctxt->input->flags & XML_INPUT_ENCODING_ERROR) == 0) { + htmlParseErr(ctxt, XML_ERR_INVALID_ENCODING, + "Invalid bytes in character encoding", NULL, NULL); + ctxt->input->flags |= XML_INPUT_ENCODING_ERROR; + } + + return(-1); +} + +/** + * htmlSkipBlankChars: + * @ctxt: the HTML parser context + * + * skip all blanks character found at that point in the input streams. + * + * Returns the number of space chars skipped + */ + +static int +htmlSkipBlankChars(xmlParserCtxtPtr ctxt) { + const xmlChar *cur = ctxt->input->cur; + size_t avail = ctxt->input->end - cur; + int res = 0; + int line = ctxt->input->line; + int col = ctxt->input->col; + + while (!PARSER_STOPPED(ctxt)) { + if (avail == 0) { + ctxt->input->cur = cur; + GROW; + cur = ctxt->input->cur; + avail = ctxt->input->end - cur; + + if (avail == 0) + break; + } + + if (*cur == '\n') { + line++; + col = 1; + } else if (IS_WS_HTML(*cur)) { + col++; + } else { + break; + } + + cur += 1; + avail -= 1; + + if (res < INT_MAX) + res++; + } + + ctxt->input->cur = cur; + ctxt->input->line = line; + ctxt->input->col = col; + + if (res > 8) + GROW; + + return(res); +} + + + +/************************************************************************ + * * + * The list of HTML elements and their properties * + * * + ************************************************************************/ + +/* + * Start Tag: 1 means the start tag can be omitted + * End Tag: 1 means the end tag can be omitted + * 2 means it's forbidden (empty elements) + * 3 means the tag is stylistic and should be closed easily + * Depr: this element is deprecated + * DTD: 1 means that this element is valid only in the Loose DTD + * 2 means that this element is valid only in the Frameset DTD + * + * Name,Start Tag,End Tag,Save End,Empty,Deprecated,DTD,inline,Description + */ + +#define DATA_RCDATA 1 +#define DATA_RAWTEXT 2 +#define DATA_PLAINTEXT 3 +#define DATA_SCRIPT 4 +#define DATA_SCRIPT_ESC1 5 +#define DATA_SCRIPT_ESC2 6 + +static const htmlElemDesc +html40ElementTable[] = { +{ "a", 0, 0, 0, 0, 0, 0, 1, "anchor ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "abbr", 0, 0, 0, 0, 0, 0, 1, "abbreviated form", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "acronym", 0, 0, 0, 0, 0, 0, 1, "", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "address", 0, 0, 0, 0, 0, 0, 0, "information on author ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "applet", 0, 0, 0, 0, 1, 1, 2, "java applet ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "area", 0, 2, 2, 1, 0, 0, 0, "client-side image map area ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "b", 0, 3, 0, 0, 0, 0, 1, "bold text style", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "base", 0, 2, 2, 1, 0, 0, 0, "document base uri ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "basefont", 0, 2, 2, 1, 1, 1, 1, "base font size " , + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "bdo", 0, 0, 0, 0, 0, 0, 1, "i18n bidi over-ride ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "big", 0, 3, 0, 0, 0, 0, 1, "large text style", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "blockquote", 0, 0, 0, 0, 0, 0, 0, "long quotation ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "body", 1, 1, 0, 0, 0, 0, 0, "document body ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "br", 0, 2, 2, 1, 0, 0, 1, "forced line break ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "button", 0, 0, 0, 0, 0, 0, 2, "push button ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "caption", 0, 0, 0, 0, 0, 0, 0, "table caption ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "center", 0, 3, 0, 0, 1, 1, 0, "shorthand for div align=center ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "cite", 0, 0, 0, 0, 0, 0, 1, "citation", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "code", 0, 0, 0, 0, 0, 0, 1, "computer code fragment", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "col", 0, 2, 2, 1, 0, 0, 0, "table column ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "colgroup", 0, 1, 0, 0, 0, 0, 0, "table column group ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "dd", 0, 1, 0, 0, 0, 0, 0, "definition description ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "del", 0, 0, 0, 0, 0, 0, 2, "deleted text ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "dfn", 0, 0, 0, 0, 0, 0, 1, "instance definition", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "dir", 0, 0, 0, 0, 1, 1, 0, "directory list", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "div", 0, 0, 0, 0, 0, 0, 0, "generic language/style container", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "dl", 0, 0, 0, 0, 0, 0, 0, "definition list ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "dt", 0, 1, 0, 0, 0, 0, 0, "definition term ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "em", 0, 3, 0, 0, 0, 0, 1, "emphasis", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "embed", 0, 1, 0, 0, 1, 1, 1, "generic embedded object ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "fieldset", 0, 0, 0, 0, 0, 0, 0, "form control group ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "font", 0, 3, 0, 0, 1, 1, 1, "local change to font ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "form", 0, 0, 0, 0, 0, 0, 0, "interactive form ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "frame", 0, 2, 2, 1, 0, 2, 0, "subwindow " , + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "frameset", 0, 0, 0, 0, 0, 2, 0, "window subdivision" , + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "h1", 0, 0, 0, 0, 0, 0, 0, "heading ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "h2", 0, 0, 0, 0, 0, 0, 0, "heading ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "h3", 0, 0, 0, 0, 0, 0, 0, "heading ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "h4", 0, 0, 0, 0, 0, 0, 0, "heading ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "h5", 0, 0, 0, 0, 0, 0, 0, "heading ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "h6", 0, 0, 0, 0, 0, 0, 0, "heading ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "head", 1, 1, 0, 0, 0, 0, 0, "document head ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "hr", 0, 2, 2, 1, 0, 0, 0, "horizontal rule " , + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "html", 1, 1, 0, 0, 0, 0, 0, "document root element ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "i", 0, 3, 0, 0, 0, 0, 1, "italic text style", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "iframe", 0, 0, 0, 0, 0, 1, 2, "inline subwindow ", + NULL, NULL, NULL, NULL, NULL, + DATA_RAWTEXT +}, +{ "img", 0, 2, 2, 1, 0, 0, 1, "embedded image ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "input", 0, 2, 2, 1, 0, 0, 1, "form control ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "ins", 0, 0, 0, 0, 0, 0, 2, "inserted text", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "isindex", 0, 2, 2, 1, 1, 1, 0, "single line prompt ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "kbd", 0, 0, 0, 0, 0, 0, 1, "text to be entered by the user", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "label", 0, 0, 0, 0, 0, 0, 1, "form field label text ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "legend", 0, 0, 0, 0, 0, 0, 0, "fieldset legend ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "li", 0, 1, 1, 0, 0, 0, 0, "list item ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "link", 0, 2, 2, 1, 0, 0, 0, "a media-independent link ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "map", 0, 0, 0, 0, 0, 0, 2, "client-side image map ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "menu", 0, 0, 0, 0, 1, 1, 0, "menu list ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "meta", 0, 2, 2, 1, 0, 0, 0, "generic metainformation ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "noembed", 0, 0, 0, 0, 0, 0, 0, "", + NULL, NULL, NULL, NULL, NULL, + DATA_RAWTEXT +}, +{ "noframes", 0, 0, 0, 0, 0, 2, 0, "alternate content container for non frame-based rendering ", + NULL, NULL, NULL, NULL, NULL, + DATA_RAWTEXT +}, +{ "noscript", 0, 0, 0, 0, 0, 0, 0, "alternate content container for non script-based rendering ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "object", 0, 0, 0, 0, 0, 0, 2, "generic embedded object ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "ol", 0, 0, 0, 0, 0, 0, 0, "ordered list ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "optgroup", 0, 0, 0, 0, 0, 0, 0, "option group ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "option", 0, 1, 0, 0, 0, 0, 0, "selectable choice " , + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "p", 0, 1, 0, 0, 0, 0, 0, "paragraph ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "param", 0, 2, 2, 1, 0, 0, 0, "named property value ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "plaintext", 0, 0, 0, 0, 0, 0, 0, "", + NULL, NULL, NULL, NULL, NULL, + DATA_PLAINTEXT +}, +{ "pre", 0, 0, 0, 0, 0, 0, 0, "preformatted text ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "q", 0, 0, 0, 0, 0, 0, 1, "short inline quotation ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "s", 0, 3, 0, 0, 1, 1, 1, "strike-through text style", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "samp", 0, 0, 0, 0, 0, 0, 1, "sample program output, scripts, etc.", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "script", 0, 0, 0, 0, 0, 0, 2, "script statements ", + NULL, NULL, NULL, NULL, NULL, + DATA_SCRIPT +}, +{ "select", 0, 0, 0, 0, 0, 0, 1, "option selector ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "small", 0, 3, 0, 0, 0, 0, 1, "small text style", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "span", 0, 0, 0, 0, 0, 0, 1, "generic language/style container ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "strike", 0, 3, 0, 0, 1, 1, 1, "strike-through text", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "strong", 0, 3, 0, 0, 0, 0, 1, "strong emphasis", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "style", 0, 0, 0, 0, 0, 0, 0, "style info ", + NULL, NULL, NULL, NULL, NULL, + DATA_RAWTEXT +}, +{ "sub", 0, 3, 0, 0, 0, 0, 1, "subscript", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "sup", 0, 3, 0, 0, 0, 0, 1, "superscript ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "table", 0, 0, 0, 0, 0, 0, 0, "", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "tbody", 1, 0, 0, 0, 0, 0, 0, "table body ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "td", 0, 0, 0, 0, 0, 0, 0, "table data cell", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "textarea", 0, 0, 0, 0, 0, 0, 1, "multi-line text field ", + NULL, NULL, NULL, NULL, NULL, + DATA_RCDATA +}, +{ "tfoot", 0, 1, 0, 0, 0, 0, 0, "table footer ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "th", 0, 1, 0, 0, 0, 0, 0, "table header cell", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "thead", 0, 1, 0, 0, 0, 0, 0, "table header ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "title", 0, 0, 0, 0, 0, 0, 0, "document title ", + NULL, NULL, NULL, NULL, NULL, + DATA_RCDATA +}, +{ "tr", 0, 0, 0, 0, 0, 0, 0, "table row ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "tt", 0, 3, 0, 0, 0, 0, 1, "teletype or monospaced text style", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "u", 0, 3, 0, 0, 1, 1, 1, "underlined text style", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "ul", 0, 0, 0, 0, 0, 0, 0, "unordered list ", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "var", 0, 0, 0, 0, 0, 0, 1, "instance of a variable or program argument", + NULL, NULL, NULL, NULL, NULL, + 0 +}, +{ "xmp", 0, 0, 0, 0, 0, 0, 1, "", + NULL, NULL, NULL, NULL, NULL, + DATA_RAWTEXT +} +}; + +typedef struct { + const char *oldTag; + const char *newTag; +} htmlStartCloseEntry; + +/* + * start tags that imply the end of current element + */ +static const htmlStartCloseEntry htmlStartClose[] = { + { "a", "a" }, + { "a", "fieldset" }, + { "a", "table" }, + { "a", "td" }, + { "a", "th" }, + { "address", "dd" }, + { "address", "dl" }, + { "address", "dt" }, + { "address", "form" }, + { "address", "li" }, + { "address", "ul" }, + { "b", "center" }, + { "b", "p" }, + { "b", "td" }, + { "b", "th" }, + { "big", "p" }, + { "caption", "col" }, + { "caption", "colgroup" }, + { "caption", "tbody" }, + { "caption", "tfoot" }, + { "caption", "thead" }, + { "caption", "tr" }, + { "col", "col" }, + { "col", "colgroup" }, + { "col", "tbody" }, + { "col", "tfoot" }, + { "col", "thead" }, + { "col", "tr" }, + { "colgroup", "colgroup" }, + { "colgroup", "tbody" }, + { "colgroup", "tfoot" }, + { "colgroup", "thead" }, + { "colgroup", "tr" }, + { "dd", "dt" }, + { "dir", "dd" }, + { "dir", "dl" }, + { "dir", "dt" }, + { "dir", "form" }, + { "dir", "ul" }, + { "dl", "form" }, + { "dl", "li" }, + { "dt", "dd" }, + { "dt", "dl" }, + { "font", "center" }, + { "font", "td" }, + { "font", "th" }, + { "form", "form" }, + { "h1", "fieldset" }, + { "h1", "form" }, + { "h1", "li" }, + { "h1", "p" }, + { "h1", "table" }, + { "h2", "fieldset" }, + { "h2", "form" }, + { "h2", "li" }, + { "h2", "p" }, + { "h2", "table" }, + { "h3", "fieldset" }, + { "h3", "form" }, + { "h3", "li" }, + { "h3", "p" }, + { "h3", "table" }, + { "h4", "fieldset" }, + { "h4", "form" }, + { "h4", "li" }, + { "h4", "p" }, + { "h4", "table" }, + { "h5", "fieldset" }, + { "h5", "form" }, + { "h5", "li" }, + { "h5", "p" }, + { "h5", "table" }, + { "h6", "fieldset" }, + { "h6", "form" }, + { "h6", "li" }, + { "h6", "p" }, + { "h6", "table" }, + { "head", "a" }, + { "head", "abbr" }, + { "head", "acronym" }, + { "head", "address" }, + { "head", "b" }, + { "head", "bdo" }, + { "head", "big" }, + { "head", "blockquote" }, + { "head", "body" }, + { "head", "br" }, + { "head", "center" }, + { "head", "cite" }, + { "head", "code" }, + { "head", "dd" }, + { "head", "dfn" }, + { "head", "dir" }, + { "head", "div" }, + { "head", "dl" }, + { "head", "dt" }, + { "head", "em" }, + { "head", "fieldset" }, + { "head", "font" }, + { "head", "form" }, + { "head", "frameset" }, + { "head", "h1" }, + { "head", "h2" }, + { "head", "h3" }, + { "head", "h4" }, + { "head", "h5" }, + { "head", "h6" }, + { "head", "hr" }, + { "head", "i" }, + { "head", "iframe" }, + { "head", "img" }, + { "head", "kbd" }, + { "head", "li" }, + { "head", "listing" }, + { "head", "map" }, + { "head", "menu" }, + { "head", "ol" }, + { "head", "p" }, + { "head", "pre" }, + { "head", "q" }, + { "head", "s" }, + { "head", "samp" }, + { "head", "small" }, + { "head", "span" }, + { "head", "strike" }, + { "head", "strong" }, + { "head", "sub" }, + { "head", "sup" }, + { "head", "table" }, + { "head", "tt" }, + { "head", "u" }, + { "head", "ul" }, + { "head", "var" }, + { "head", "xmp" }, + { "hr", "form" }, + { "i", "center" }, + { "i", "p" }, + { "i", "td" }, + { "i", "th" }, + { "legend", "fieldset" }, + { "li", "li" }, + { "link", "body" }, + { "link", "frameset" }, + { "listing", "dd" }, + { "listing", "dl" }, + { "listing", "dt" }, + { "listing", "fieldset" }, + { "listing", "form" }, + { "listing", "li" }, + { "listing", "table" }, + { "listing", "ul" }, + { "menu", "dd" }, + { "menu", "dl" }, + { "menu", "dt" }, + { "menu", "form" }, + { "menu", "ul" }, + { "ol", "form" }, + { "option", "optgroup" }, + { "option", "option" }, + { "p", "address" }, + { "p", "blockquote" }, + { "p", "body" }, + { "p", "caption" }, + { "p", "center" }, + { "p", "col" }, + { "p", "colgroup" }, + { "p", "dd" }, + { "p", "dir" }, + { "p", "div" }, + { "p", "dl" }, + { "p", "dt" }, + { "p", "fieldset" }, + { "p", "form" }, + { "p", "frameset" }, + { "p", "h1" }, + { "p", "h2" }, + { "p", "h3" }, + { "p", "h4" }, + { "p", "h5" }, + { "p", "h6" }, + { "p", "head" }, + { "p", "hr" }, + { "p", "li" }, + { "p", "listing" }, + { "p", "menu" }, + { "p", "ol" }, + { "p", "p" }, + { "p", "pre" }, + { "p", "table" }, + { "p", "tbody" }, + { "p", "td" }, + { "p", "tfoot" }, + { "p", "th" }, + { "p", "title" }, + { "p", "tr" }, + { "p", "ul" }, + { "p", "xmp" }, + { "pre", "dd" }, + { "pre", "dl" }, + { "pre", "dt" }, + { "pre", "fieldset" }, + { "pre", "form" }, + { "pre", "li" }, + { "pre", "table" }, + { "pre", "ul" }, + { "s", "p" }, + { "script", "noscript" }, + { "small", "p" }, + { "span", "td" }, + { "span", "th" }, + { "strike", "p" }, + { "style", "body" }, + { "style", "frameset" }, + { "tbody", "tbody" }, + { "tbody", "tfoot" }, + { "td", "tbody" }, + { "td", "td" }, + { "td", "tfoot" }, + { "td", "th" }, + { "td", "tr" }, + { "tfoot", "tbody" }, + { "th", "tbody" }, + { "th", "td" }, + { "th", "tfoot" }, + { "th", "th" }, + { "th", "tr" }, + { "thead", "tbody" }, + { "thead", "tfoot" }, + { "title", "body" }, + { "title", "frameset" }, + { "tr", "tbody" }, + { "tr", "tfoot" }, + { "tr", "tr" }, + { "tt", "p" }, + { "u", "p" }, + { "u", "td" }, + { "u", "th" }, + { "ul", "address" }, + { "ul", "form" }, + { "ul", "menu" }, + { "ul", "pre" }, + { "xmp", "dd" }, + { "xmp", "dl" }, + { "xmp", "dt" }, + { "xmp", "fieldset" }, + { "xmp", "form" }, + { "xmp", "li" }, + { "xmp", "table" }, + { "xmp", "ul" } +}; + +/* + * The list of HTML elements which are supposed not to have + * CDATA content and where a p element will be implied + * + * TODO: extend that list by reading the HTML SGML DTD on + * implied paragraph + */ +static const char *const htmlNoContentElements[] = { + "html", + "head", + NULL +}; + +/* + * The list of HTML attributes which are of content %Script; + * NOTE: when adding ones, check htmlIsScriptAttribute() since + * it assumes the name starts with 'on' + */ +static const char *const htmlScriptAttributes[] = { + "onclick", + "ondblclick", + "onmousedown", + "onmouseup", + "onmouseover", + "onmousemove", + "onmouseout", + "onkeypress", + "onkeydown", + "onkeyup", + "onload", + "onunload", + "onfocus", + "onblur", + "onsubmit", + "onreset", + "onchange", + "onselect" +}; + +/* + * This table is used by the htmlparser to know what to do with + * broken html pages. By assigning different priorities to different + * elements the parser can decide how to handle extra endtags. + * Endtags are only allowed to close elements with lower or equal + * priority. + */ + +typedef struct { + const char *name; + int priority; +} elementPriority; + +static const elementPriority htmlEndPriority[] = { + {"div", 150}, + {"td", 160}, + {"th", 160}, + {"tr", 170}, + {"thead", 180}, + {"tbody", 180}, + {"tfoot", 180}, + {"table", 190}, + {"head", 200}, + {"body", 200}, + {"html", 220}, + {NULL, 100} /* Default priority */ +}; + +/************************************************************************ + * * + * functions to handle HTML specific data * + * * + ************************************************************************/ + +static void +htmlParserFinishElementParsing(htmlParserCtxtPtr ctxt) { + /* + * Capture end position and add node + */ + if ( ctxt->node != NULL && ctxt->record_info ) { + ctxt->nodeInfo->end_pos = ctxt->input->consumed + + (CUR_PTR - ctxt->input->base); + ctxt->nodeInfo->end_line = ctxt->input->line; + ctxt->nodeInfo->node = ctxt->node; + xmlParserAddNodeInfo(ctxt, ctxt->nodeInfo); + htmlNodeInfoPop(ctxt); + } +} + +/** + * htmlInitAutoClose: + * + * DEPRECATED: This is a no-op. + */ +void +htmlInitAutoClose(void) { +} + +static int +htmlCompareTags(const void *key, const void *member) { + const xmlChar *tag = (const xmlChar *) key; + const htmlElemDesc *desc = (const htmlElemDesc *) member; + + return(xmlStrcasecmp(tag, BAD_CAST desc->name)); +} + +/** + * htmlTagLookup: + * @tag: The tag name in lowercase + * + * Lookup the HTML tag in the ElementTable + * + * Returns the related htmlElemDescPtr or NULL if not found. + */ +const htmlElemDesc * +htmlTagLookup(const xmlChar *tag) { + if (tag == NULL) + return(NULL); + + return((const htmlElemDesc *) bsearch(tag, html40ElementTable, + sizeof(html40ElementTable) / sizeof(htmlElemDesc), + sizeof(htmlElemDesc), htmlCompareTags)); +} + +/** + * htmlGetEndPriority: + * @name: The name of the element to look up the priority for. + * + * Return value: The "endtag" priority. + **/ +static int +htmlGetEndPriority (const xmlChar *name) { + int i = 0; + + while ((htmlEndPriority[i].name != NULL) && + (!xmlStrEqual((const xmlChar *)htmlEndPriority[i].name, name))) + i++; + + return(htmlEndPriority[i].priority); +} + + +static int +htmlCompareStartClose(const void *vkey, const void *member) { + const htmlStartCloseEntry *key = (const htmlStartCloseEntry *) vkey; + const htmlStartCloseEntry *entry = (const htmlStartCloseEntry *) member; + int ret; + + ret = strcmp(key->oldTag, entry->oldTag); + if (ret == 0) + ret = strcmp(key->newTag, entry->newTag); + + return(ret); +} + +/** + * htmlCheckAutoClose: + * @newtag: The new tag name + * @oldtag: The old tag name + * + * Checks whether the new tag is one of the registered valid tags for + * closing old. + * + * Returns 0 if no, 1 if yes. + */ +static int +htmlCheckAutoClose(const xmlChar * newtag, const xmlChar * oldtag) +{ + htmlStartCloseEntry key; + void *res; + + key.oldTag = (const char *) oldtag; + key.newTag = (const char *) newtag; + res = bsearch(&key, htmlStartClose, + sizeof(htmlStartClose) / sizeof(htmlStartCloseEntry), + sizeof(htmlStartCloseEntry), htmlCompareStartClose); + return(res != NULL); +} + +/** + * htmlAutoCloseOnClose: + * @ctxt: an HTML parser context + * @newtag: The new tag name + * @force: force the tag closure + * + * The HTML DTD allows an ending tag to implicitly close other tags. + */ +static void +htmlAutoCloseOnClose(htmlParserCtxtPtr ctxt, const xmlChar * newtag) +{ + const htmlElemDesc *info; + int i, priority; + + if (ctxt->options & HTML_PARSE_HTML5) + return; + + priority = htmlGetEndPriority(newtag); + + for (i = (ctxt->nameNr - 1); i >= 0; i--) { + + if (xmlStrEqual(newtag, ctxt->nameTab[i])) + break; + /* + * A misplaced endtag can only close elements with lower + * or equal priority, so if we find an element with higher + * priority before we find an element with + * matching name, we just ignore this endtag + */ + if (htmlGetEndPriority(ctxt->nameTab[i]) > priority) + return; + } + if (i < 0) + return; + + while (!xmlStrEqual(newtag, ctxt->name)) { + info = htmlTagLookup(ctxt->name); + if ((info != NULL) && (info->endTag == 3)) { + htmlParseErr(ctxt, XML_ERR_TAG_NAME_MISMATCH, + "Opening and ending tag mismatch: %s and %s\n", + newtag, ctxt->name); + } + htmlParserFinishElementParsing(ctxt); + if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL)) + ctxt->sax->endElement(ctxt->userData, ctxt->name); + htmlnamePop(ctxt); + } +} + +/** + * htmlAutoCloseOnEnd: + * @ctxt: an HTML parser context + * + * Close all remaining tags at the end of the stream + */ +static void +htmlAutoCloseOnEnd(htmlParserCtxtPtr ctxt) +{ + int i; + + if (ctxt->options & HTML_PARSE_HTML5) + return; + + if (ctxt->nameNr == 0) + return; + for (i = (ctxt->nameNr - 1); i >= 0; i--) { + htmlParserFinishElementParsing(ctxt); + if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL)) + ctxt->sax->endElement(ctxt->userData, ctxt->name); + htmlnamePop(ctxt); + } +} + +/** + * htmlAutoClose: + * @ctxt: an HTML parser context + * @newtag: The new tag name or NULL + * + * The HTML DTD allows a tag to implicitly close other tags. + * The list is kept in htmlStartClose array. This function is + * called when a new tag has been detected and generates the + * appropriates closes if possible/needed. + * If newtag is NULL this mean we are at the end of the resource + * and we should check + */ +static void +htmlAutoClose(htmlParserCtxtPtr ctxt, const xmlChar * newtag) +{ + if (ctxt->options & HTML_PARSE_HTML5) + return; + + if (newtag == NULL) + return; + + while ((ctxt->name != NULL) && + (htmlCheckAutoClose(newtag, ctxt->name))) { + htmlParserFinishElementParsing(ctxt); + if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL)) + ctxt->sax->endElement(ctxt->userData, ctxt->name); + htmlnamePop(ctxt); + } +} + +/** + * htmlAutoCloseTag: + * @doc: the HTML document + * @name: The tag name + * @elem: the HTML element + * + * DEPRECATED: Internal function, don't use. + * + * The HTML DTD allows a tag to implicitly close other tags. + * The list is kept in htmlStartClose array. This function checks + * if the element or one of it's children would autoclose the + * given tag. + * + * Returns 1 if autoclose, 0 otherwise + */ +int +htmlAutoCloseTag(htmlDocPtr doc, const xmlChar *name, htmlNodePtr elem) { + htmlNodePtr child; + + if (elem == NULL) return(1); + if (xmlStrEqual(name, elem->name)) return(0); + if (htmlCheckAutoClose(elem->name, name)) return(1); + child = elem->children; + while (child != NULL) { + if (htmlAutoCloseTag(doc, name, child)) return(1); + child = child->next; + } + return(0); +} + +/** + * htmlIsAutoClosed: + * @doc: the HTML document + * @elem: the HTML element + * + * DEPRECATED: Internal function, don't use. + * + * The HTML DTD allows a tag to implicitly close other tags. + * The list is kept in htmlStartClose array. This function checks + * if a tag is autoclosed by one of it's child + * + * Returns 1 if autoclosed, 0 otherwise + */ +int +htmlIsAutoClosed(htmlDocPtr doc, htmlNodePtr elem) { + htmlNodePtr child; + + if (elem == NULL) return(1); + child = elem->children; + while (child != NULL) { + if (htmlAutoCloseTag(doc, elem->name, child)) return(1); + child = child->next; + } + return(0); +} + +/** + * htmlCheckImplied: + * @ctxt: an HTML parser context + * @newtag: The new tag name + * + * The HTML DTD allows a tag to exists only implicitly + * called when a new tag has been detected and generates the + * appropriates implicit tags if missing + */ +static void +htmlCheckImplied(htmlParserCtxtPtr ctxt, const xmlChar *newtag) { + int i; + + if (ctxt->options & (HTML_PARSE_NOIMPLIED | HTML_PARSE_HTML5)) + return; + if (!htmlOmittedDefaultValue) + return; + if (xmlStrEqual(newtag, BAD_CAST"html")) + return; + if (ctxt->nameNr <= 0) { + htmlnamePush(ctxt, BAD_CAST"html"); + if ((ctxt->sax != NULL) && (ctxt->sax->startElement != NULL)) + ctxt->sax->startElement(ctxt->userData, BAD_CAST"html", NULL); + } + if ((xmlStrEqual(newtag, BAD_CAST"body")) || (xmlStrEqual(newtag, BAD_CAST"head"))) + return; + if ((ctxt->nameNr <= 1) && + ((xmlStrEqual(newtag, BAD_CAST"script")) || + (xmlStrEqual(newtag, BAD_CAST"style")) || + (xmlStrEqual(newtag, BAD_CAST"meta")) || + (xmlStrEqual(newtag, BAD_CAST"link")) || + (xmlStrEqual(newtag, BAD_CAST"title")) || + (xmlStrEqual(newtag, BAD_CAST"base")))) { + if (ctxt->html >= 3) { + /* we already saw or generated an before */ + return; + } + /* + * dropped OBJECT ... i you put it first BODY will be + * assumed ! + */ + htmlnamePush(ctxt, BAD_CAST"head"); + if ((ctxt->sax != NULL) && (ctxt->sax->startElement != NULL)) + ctxt->sax->startElement(ctxt->userData, BAD_CAST"head", NULL); + } else if ((!xmlStrEqual(newtag, BAD_CAST"noframes")) && + (!xmlStrEqual(newtag, BAD_CAST"frame")) && + (!xmlStrEqual(newtag, BAD_CAST"frameset"))) { + if (ctxt->html >= 10) { + /* we already saw or generated a before */ + return; + } + for (i = 0;i < ctxt->nameNr;i++) { + if (xmlStrEqual(ctxt->nameTab[i], BAD_CAST"body")) { + return; + } + if (xmlStrEqual(ctxt->nameTab[i], BAD_CAST"head")) { + return; + } + } + + htmlnamePush(ctxt, BAD_CAST"body"); + if ((ctxt->sax != NULL) && (ctxt->sax->startElement != NULL)) + ctxt->sax->startElement(ctxt->userData, BAD_CAST"body", NULL); + } +} + +/** + * htmlCheckParagraph + * @ctxt: an HTML parser context + * + * Check whether a p element need to be implied before inserting + * characters in the current element. + * + * Returns 1 if a paragraph has been inserted, 0 if not and -1 + * in case of error. + */ + +static int +htmlCheckParagraph(htmlParserCtxtPtr ctxt) { + const xmlChar *tag; + int i; + + if (ctxt == NULL) + return(-1); + if (ctxt->options & HTML_PARSE_HTML5) + return(0); + + tag = ctxt->name; + if (tag == NULL) { + htmlAutoClose(ctxt, BAD_CAST"p"); + htmlCheckImplied(ctxt, BAD_CAST"p"); + htmlnamePush(ctxt, BAD_CAST"p"); + if ((ctxt->sax != NULL) && (ctxt->sax->startElement != NULL)) + ctxt->sax->startElement(ctxt->userData, BAD_CAST"p", NULL); + return(1); + } + if (!htmlOmittedDefaultValue) + return(0); + for (i = 0; htmlNoContentElements[i] != NULL; i++) { + if (xmlStrEqual(tag, BAD_CAST htmlNoContentElements[i])) { + htmlAutoClose(ctxt, BAD_CAST"p"); + htmlCheckImplied(ctxt, BAD_CAST"p"); + htmlnamePush(ctxt, BAD_CAST"p"); + if ((ctxt->sax != NULL) && (ctxt->sax->startElement != NULL)) + ctxt->sax->startElement(ctxt->userData, BAD_CAST"p", NULL); + return(1); + } + } + return(0); +} + +/** + * htmlIsScriptAttribute: + * @name: an attribute name + * + * Check if an attribute is of content type Script + * + * Returns 1 is the attribute is a script 0 otherwise + */ +int +htmlIsScriptAttribute(const xmlChar *name) { + unsigned int i; + + if (name == NULL) + return(0); + /* + * all script attributes start with 'on' + */ + if ((name[0] != 'o') || (name[1] != 'n')) + return(0); + for (i = 0; + i < sizeof(htmlScriptAttributes)/sizeof(htmlScriptAttributes[0]); + i++) { + if (xmlStrEqual(name, (const xmlChar *) htmlScriptAttributes[i])) + return(1); + } + return(0); +} + +/************************************************************************ + * * + * The list of HTML predefined entities * + * * + ************************************************************************/ + + +static const htmlEntityDesc html40EntitiesTable[] = { +/* + * the 4 absolute ones, plus apostrophe. + */ +{ 34, "quot", "quotation mark = APL quote, U+0022 ISOnum" }, +{ 38, "amp", "ampersand, U+0026 ISOnum" }, +{ 39, "apos", "single quote" }, +{ 60, "lt", "less-than sign, U+003C ISOnum" }, +{ 62, "gt", "greater-than sign, U+003E ISOnum" }, + +/* + * A bunch still in the 128-255 range + * Replacing them depend really on the charset used. + */ +{ 160, "nbsp", "no-break space = non-breaking space, U+00A0 ISOnum" }, +{ 161, "iexcl","inverted exclamation mark, U+00A1 ISOnum" }, +{ 162, "cent", "cent sign, U+00A2 ISOnum" }, +{ 163, "pound","pound sign, U+00A3 ISOnum" }, +{ 164, "curren","currency sign, U+00A4 ISOnum" }, +{ 165, "yen", "yen sign = yuan sign, U+00A5 ISOnum" }, +{ 166, "brvbar","broken bar = broken vertical bar, U+00A6 ISOnum" }, +{ 167, "sect", "section sign, U+00A7 ISOnum" }, +{ 168, "uml", "diaeresis = spacing diaeresis, U+00A8 ISOdia" }, +{ 169, "copy", "copyright sign, U+00A9 ISOnum" }, +{ 170, "ordf", "feminine ordinal indicator, U+00AA ISOnum" }, +{ 171, "laquo","left-pointing double angle quotation mark = left pointing guillemet, U+00AB ISOnum" }, +{ 172, "not", "not sign, U+00AC ISOnum" }, +{ 173, "shy", "soft hyphen = discretionary hyphen, U+00AD ISOnum" }, +{ 174, "reg", "registered sign = registered trade mark sign, U+00AE ISOnum" }, +{ 175, "macr", "macron = spacing macron = overline = APL overbar, U+00AF ISOdia" }, +{ 176, "deg", "degree sign, U+00B0 ISOnum" }, +{ 177, "plusmn","plus-minus sign = plus-or-minus sign, U+00B1 ISOnum" }, +{ 178, "sup2", "superscript two = superscript digit two = squared, U+00B2 ISOnum" }, +{ 179, "sup3", "superscript three = superscript digit three = cubed, U+00B3 ISOnum" }, +{ 180, "acute","acute accent = spacing acute, U+00B4 ISOdia" }, +{ 181, "micro","micro sign, U+00B5 ISOnum" }, +{ 182, "para", "pilcrow sign = paragraph sign, U+00B6 ISOnum" }, +{ 183, "middot","middle dot = Georgian comma Greek middle dot, U+00B7 ISOnum" }, +{ 184, "cedil","cedilla = spacing cedilla, U+00B8 ISOdia" }, +{ 185, "sup1", "superscript one = superscript digit one, U+00B9 ISOnum" }, +{ 186, "ordm", "masculine ordinal indicator, U+00BA ISOnum" }, +{ 187, "raquo","right-pointing double angle quotation mark right pointing guillemet, U+00BB ISOnum" }, +{ 188, "frac14","vulgar fraction one quarter = fraction one quarter, U+00BC ISOnum" }, +{ 189, "frac12","vulgar fraction one half = fraction one half, U+00BD ISOnum" }, +{ 190, "frac34","vulgar fraction three quarters = fraction three quarters, U+00BE ISOnum" }, +{ 191, "iquest","inverted question mark = turned question mark, U+00BF ISOnum" }, +{ 192, "Agrave","latin capital letter A with grave = latin capital letter A grave, U+00C0 ISOlat1" }, +{ 193, "Aacute","latin capital letter A with acute, U+00C1 ISOlat1" }, +{ 194, "Acirc","latin capital letter A with circumflex, U+00C2 ISOlat1" }, +{ 195, "Atilde","latin capital letter A with tilde, U+00C3 ISOlat1" }, +{ 196, "Auml", "latin capital letter A with diaeresis, U+00C4 ISOlat1" }, +{ 197, "Aring","latin capital letter A with ring above = latin capital letter A ring, U+00C5 ISOlat1" }, +{ 198, "AElig","latin capital letter AE = latin capital ligature AE, U+00C6 ISOlat1" }, +{ 199, "Ccedil","latin capital letter C with cedilla, U+00C7 ISOlat1" }, +{ 200, "Egrave","latin capital letter E with grave, U+00C8 ISOlat1" }, +{ 201, "Eacute","latin capital letter E with acute, U+00C9 ISOlat1" }, +{ 202, "Ecirc","latin capital letter E with circumflex, U+00CA ISOlat1" }, +{ 203, "Euml", "latin capital letter E with diaeresis, U+00CB ISOlat1" }, +{ 204, "Igrave","latin capital letter I with grave, U+00CC ISOlat1" }, +{ 205, "Iacute","latin capital letter I with acute, U+00CD ISOlat1" }, +{ 206, "Icirc","latin capital letter I with circumflex, U+00CE ISOlat1" }, +{ 207, "Iuml", "latin capital letter I with diaeresis, U+00CF ISOlat1" }, +{ 208, "ETH", "latin capital letter ETH, U+00D0 ISOlat1" }, +{ 209, "Ntilde","latin capital letter N with tilde, U+00D1 ISOlat1" }, +{ 210, "Ograve","latin capital letter O with grave, U+00D2 ISOlat1" }, +{ 211, "Oacute","latin capital letter O with acute, U+00D3 ISOlat1" }, +{ 212, "Ocirc","latin capital letter O with circumflex, U+00D4 ISOlat1" }, +{ 213, "Otilde","latin capital letter O with tilde, U+00D5 ISOlat1" }, +{ 214, "Ouml", "latin capital letter O with diaeresis, U+00D6 ISOlat1" }, +{ 215, "times","multiplication sign, U+00D7 ISOnum" }, +{ 216, "Oslash","latin capital letter O with stroke latin capital letter O slash, U+00D8 ISOlat1" }, +{ 217, "Ugrave","latin capital letter U with grave, U+00D9 ISOlat1" }, +{ 218, "Uacute","latin capital letter U with acute, U+00DA ISOlat1" }, +{ 219, "Ucirc","latin capital letter U with circumflex, U+00DB ISOlat1" }, +{ 220, "Uuml", "latin capital letter U with diaeresis, U+00DC ISOlat1" }, +{ 221, "Yacute","latin capital letter Y with acute, U+00DD ISOlat1" }, +{ 222, "THORN","latin capital letter THORN, U+00DE ISOlat1" }, +{ 223, "szlig","latin small letter sharp s = ess-zed, U+00DF ISOlat1" }, +{ 224, "agrave","latin small letter a with grave = latin small letter a grave, U+00E0 ISOlat1" }, +{ 225, "aacute","latin small letter a with acute, U+00E1 ISOlat1" }, +{ 226, "acirc","latin small letter a with circumflex, U+00E2 ISOlat1" }, +{ 227, "atilde","latin small letter a with tilde, U+00E3 ISOlat1" }, +{ 228, "auml", "latin small letter a with diaeresis, U+00E4 ISOlat1" }, +{ 229, "aring","latin small letter a with ring above = latin small letter a ring, U+00E5 ISOlat1" }, +{ 230, "aelig","latin small letter ae = latin small ligature ae, U+00E6 ISOlat1" }, +{ 231, "ccedil","latin small letter c with cedilla, U+00E7 ISOlat1" }, +{ 232, "egrave","latin small letter e with grave, U+00E8 ISOlat1" }, +{ 233, "eacute","latin small letter e with acute, U+00E9 ISOlat1" }, +{ 234, "ecirc","latin small letter e with circumflex, U+00EA ISOlat1" }, +{ 235, "euml", "latin small letter e with diaeresis, U+00EB ISOlat1" }, +{ 236, "igrave","latin small letter i with grave, U+00EC ISOlat1" }, +{ 237, "iacute","latin small letter i with acute, U+00ED ISOlat1" }, +{ 238, "icirc","latin small letter i with circumflex, U+00EE ISOlat1" }, +{ 239, "iuml", "latin small letter i with diaeresis, U+00EF ISOlat1" }, +{ 240, "eth", "latin small letter eth, U+00F0 ISOlat1" }, +{ 241, "ntilde","latin small letter n with tilde, U+00F1 ISOlat1" }, +{ 242, "ograve","latin small letter o with grave, U+00F2 ISOlat1" }, +{ 243, "oacute","latin small letter o with acute, U+00F3 ISOlat1" }, +{ 244, "ocirc","latin small letter o with circumflex, U+00F4 ISOlat1" }, +{ 245, "otilde","latin small letter o with tilde, U+00F5 ISOlat1" }, +{ 246, "ouml", "latin small letter o with diaeresis, U+00F6 ISOlat1" }, +{ 247, "divide","division sign, U+00F7 ISOnum" }, +{ 248, "oslash","latin small letter o with stroke, = latin small letter o slash, U+00F8 ISOlat1" }, +{ 249, "ugrave","latin small letter u with grave, U+00F9 ISOlat1" }, +{ 250, "uacute","latin small letter u with acute, U+00FA ISOlat1" }, +{ 251, "ucirc","latin small letter u with circumflex, U+00FB ISOlat1" }, +{ 252, "uuml", "latin small letter u with diaeresis, U+00FC ISOlat1" }, +{ 253, "yacute","latin small letter y with acute, U+00FD ISOlat1" }, +{ 254, "thorn","latin small letter thorn with, U+00FE ISOlat1" }, +{ 255, "yuml", "latin small letter y with diaeresis, U+00FF ISOlat1" }, + +{ 338, "OElig","latin capital ligature OE, U+0152 ISOlat2" }, +{ 339, "oelig","latin small ligature oe, U+0153 ISOlat2" }, +{ 352, "Scaron","latin capital letter S with caron, U+0160 ISOlat2" }, +{ 353, "scaron","latin small letter s with caron, U+0161 ISOlat2" }, +{ 376, "Yuml", "latin capital letter Y with diaeresis, U+0178 ISOlat2" }, + +/* + * Anything below should really be kept as entities references + */ +{ 402, "fnof", "latin small f with hook = function = florin, U+0192 ISOtech" }, + +{ 710, "circ", "modifier letter circumflex accent, U+02C6 ISOpub" }, +{ 732, "tilde","small tilde, U+02DC ISOdia" }, + +{ 913, "Alpha","greek capital letter alpha, U+0391" }, +{ 914, "Beta", "greek capital letter beta, U+0392" }, +{ 915, "Gamma","greek capital letter gamma, U+0393 ISOgrk3" }, +{ 916, "Delta","greek capital letter delta, U+0394 ISOgrk3" }, +{ 917, "Epsilon","greek capital letter epsilon, U+0395" }, +{ 918, "Zeta", "greek capital letter zeta, U+0396" }, +{ 919, "Eta", "greek capital letter eta, U+0397" }, +{ 920, "Theta","greek capital letter theta, U+0398 ISOgrk3" }, +{ 921, "Iota", "greek capital letter iota, U+0399" }, +{ 922, "Kappa","greek capital letter kappa, U+039A" }, +{ 923, "Lambda", "greek capital letter lambda, U+039B ISOgrk3" }, +{ 924, "Mu", "greek capital letter mu, U+039C" }, +{ 925, "Nu", "greek capital letter nu, U+039D" }, +{ 926, "Xi", "greek capital letter xi, U+039E ISOgrk3" }, +{ 927, "Omicron","greek capital letter omicron, U+039F" }, +{ 928, "Pi", "greek capital letter pi, U+03A0 ISOgrk3" }, +{ 929, "Rho", "greek capital letter rho, U+03A1" }, +{ 931, "Sigma","greek capital letter sigma, U+03A3 ISOgrk3" }, +{ 932, "Tau", "greek capital letter tau, U+03A4" }, +{ 933, "Upsilon","greek capital letter upsilon, U+03A5 ISOgrk3" }, +{ 934, "Phi", "greek capital letter phi, U+03A6 ISOgrk3" }, +{ 935, "Chi", "greek capital letter chi, U+03A7" }, +{ 936, "Psi", "greek capital letter psi, U+03A8 ISOgrk3" }, +{ 937, "Omega","greek capital letter omega, U+03A9 ISOgrk3" }, + +{ 945, "alpha","greek small letter alpha, U+03B1 ISOgrk3" }, +{ 946, "beta", "greek small letter beta, U+03B2 ISOgrk3" }, +{ 947, "gamma","greek small letter gamma, U+03B3 ISOgrk3" }, +{ 948, "delta","greek small letter delta, U+03B4 ISOgrk3" }, +{ 949, "epsilon","greek small letter epsilon, U+03B5 ISOgrk3" }, +{ 950, "zeta", "greek small letter zeta, U+03B6 ISOgrk3" }, +{ 951, "eta", "greek small letter eta, U+03B7 ISOgrk3" }, +{ 952, "theta","greek small letter theta, U+03B8 ISOgrk3" }, +{ 953, "iota", "greek small letter iota, U+03B9 ISOgrk3" }, +{ 954, "kappa","greek small letter kappa, U+03BA ISOgrk3" }, +{ 955, "lambda","greek small letter lambda, U+03BB ISOgrk3" }, +{ 956, "mu", "greek small letter mu, U+03BC ISOgrk3" }, +{ 957, "nu", "greek small letter nu, U+03BD ISOgrk3" }, +{ 958, "xi", "greek small letter xi, U+03BE ISOgrk3" }, +{ 959, "omicron","greek small letter omicron, U+03BF NEW" }, +{ 960, "pi", "greek small letter pi, U+03C0 ISOgrk3" }, +{ 961, "rho", "greek small letter rho, U+03C1 ISOgrk3" }, +{ 962, "sigmaf","greek small letter final sigma, U+03C2 ISOgrk3" }, +{ 963, "sigma","greek small letter sigma, U+03C3 ISOgrk3" }, +{ 964, "tau", "greek small letter tau, U+03C4 ISOgrk3" }, +{ 965, "upsilon","greek small letter upsilon, U+03C5 ISOgrk3" }, +{ 966, "phi", "greek small letter phi, U+03C6 ISOgrk3" }, +{ 967, "chi", "greek small letter chi, U+03C7 ISOgrk3" }, +{ 968, "psi", "greek small letter psi, U+03C8 ISOgrk3" }, +{ 969, "omega","greek small letter omega, U+03C9 ISOgrk3" }, +{ 977, "thetasym","greek small letter theta symbol, U+03D1 NEW" }, +{ 978, "upsih","greek upsilon with hook symbol, U+03D2 NEW" }, +{ 982, "piv", "greek pi symbol, U+03D6 ISOgrk3" }, + +{ 8194, "ensp", "en space, U+2002 ISOpub" }, +{ 8195, "emsp", "em space, U+2003 ISOpub" }, +{ 8201, "thinsp","thin space, U+2009 ISOpub" }, +{ 8204, "zwnj", "zero width non-joiner, U+200C NEW RFC 2070" }, +{ 8205, "zwj", "zero width joiner, U+200D NEW RFC 2070" }, +{ 8206, "lrm", "left-to-right mark, U+200E NEW RFC 2070" }, +{ 8207, "rlm", "right-to-left mark, U+200F NEW RFC 2070" }, +{ 8211, "ndash","en dash, U+2013 ISOpub" }, +{ 8212, "mdash","em dash, U+2014 ISOpub" }, +{ 8216, "lsquo","left single quotation mark, U+2018 ISOnum" }, +{ 8217, "rsquo","right single quotation mark, U+2019 ISOnum" }, +{ 8218, "sbquo","single low-9 quotation mark, U+201A NEW" }, +{ 8220, "ldquo","left double quotation mark, U+201C ISOnum" }, +{ 8221, "rdquo","right double quotation mark, U+201D ISOnum" }, +{ 8222, "bdquo","double low-9 quotation mark, U+201E NEW" }, +{ 8224, "dagger","dagger, U+2020 ISOpub" }, +{ 8225, "Dagger","double dagger, U+2021 ISOpub" }, + +{ 8226, "bull", "bullet = black small circle, U+2022 ISOpub" }, +{ 8230, "hellip","horizontal ellipsis = three dot leader, U+2026 ISOpub" }, + +{ 8240, "permil","per mille sign, U+2030 ISOtech" }, + +{ 8242, "prime","prime = minutes = feet, U+2032 ISOtech" }, +{ 8243, "Prime","double prime = seconds = inches, U+2033 ISOtech" }, + +{ 8249, "lsaquo","single left-pointing angle quotation mark, U+2039 ISO proposed" }, +{ 8250, "rsaquo","single right-pointing angle quotation mark, U+203A ISO proposed" }, + +{ 8254, "oline","overline = spacing overscore, U+203E NEW" }, +{ 8260, "frasl","fraction slash, U+2044 NEW" }, + +{ 8364, "euro", "euro sign, U+20AC NEW" }, + +{ 8465, "image","blackletter capital I = imaginary part, U+2111 ISOamso" }, +{ 8472, "weierp","script capital P = power set = Weierstrass p, U+2118 ISOamso" }, +{ 8476, "real", "blackletter capital R = real part symbol, U+211C ISOamso" }, +{ 8482, "trade","trade mark sign, U+2122 ISOnum" }, +{ 8501, "alefsym","alef symbol = first transfinite cardinal, U+2135 NEW" }, +{ 8592, "larr", "leftwards arrow, U+2190 ISOnum" }, +{ 8593, "uarr", "upwards arrow, U+2191 ISOnum" }, +{ 8594, "rarr", "rightwards arrow, U+2192 ISOnum" }, +{ 8595, "darr", "downwards arrow, U+2193 ISOnum" }, +{ 8596, "harr", "left right arrow, U+2194 ISOamsa" }, +{ 8629, "crarr","downwards arrow with corner leftwards = carriage return, U+21B5 NEW" }, +{ 8656, "lArr", "leftwards double arrow, U+21D0 ISOtech" }, +{ 8657, "uArr", "upwards double arrow, U+21D1 ISOamsa" }, +{ 8658, "rArr", "rightwards double arrow, U+21D2 ISOtech" }, +{ 8659, "dArr", "downwards double arrow, U+21D3 ISOamsa" }, +{ 8660, "hArr", "left right double arrow, U+21D4 ISOamsa" }, + +{ 8704, "forall","for all, U+2200 ISOtech" }, +{ 8706, "part", "partial differential, U+2202 ISOtech" }, +{ 8707, "exist","there exists, U+2203 ISOtech" }, +{ 8709, "empty","empty set = null set = diameter, U+2205 ISOamso" }, +{ 8711, "nabla","nabla = backward difference, U+2207 ISOtech" }, +{ 8712, "isin", "element of, U+2208 ISOtech" }, +{ 8713, "notin","not an element of, U+2209 ISOtech" }, +{ 8715, "ni", "contains as member, U+220B ISOtech" }, +{ 8719, "prod", "n-ary product = product sign, U+220F ISOamsb" }, +{ 8721, "sum", "n-ary summation, U+2211 ISOamsb" }, +{ 8722, "minus","minus sign, U+2212 ISOtech" }, +{ 8727, "lowast","asterisk operator, U+2217 ISOtech" }, +{ 8730, "radic","square root = radical sign, U+221A ISOtech" }, +{ 8733, "prop", "proportional to, U+221D ISOtech" }, +{ 8734, "infin","infinity, U+221E ISOtech" }, +{ 8736, "ang", "angle, U+2220 ISOamso" }, +{ 8743, "and", "logical and = wedge, U+2227 ISOtech" }, +{ 8744, "or", "logical or = vee, U+2228 ISOtech" }, +{ 8745, "cap", "intersection = cap, U+2229 ISOtech" }, +{ 8746, "cup", "union = cup, U+222A ISOtech" }, +{ 8747, "int", "integral, U+222B ISOtech" }, +{ 8756, "there4","therefore, U+2234 ISOtech" }, +{ 8764, "sim", "tilde operator = varies with = similar to, U+223C ISOtech" }, +{ 8773, "cong", "approximately equal to, U+2245 ISOtech" }, +{ 8776, "asymp","almost equal to = asymptotic to, U+2248 ISOamsr" }, +{ 8800, "ne", "not equal to, U+2260 ISOtech" }, +{ 8801, "equiv","identical to, U+2261 ISOtech" }, +{ 8804, "le", "less-than or equal to, U+2264 ISOtech" }, +{ 8805, "ge", "greater-than or equal to, U+2265 ISOtech" }, +{ 8834, "sub", "subset of, U+2282 ISOtech" }, +{ 8835, "sup", "superset of, U+2283 ISOtech" }, +{ 8836, "nsub", "not a subset of, U+2284 ISOamsn" }, +{ 8838, "sube", "subset of or equal to, U+2286 ISOtech" }, +{ 8839, "supe", "superset of or equal to, U+2287 ISOtech" }, +{ 8853, "oplus","circled plus = direct sum, U+2295 ISOamsb" }, +{ 8855, "otimes","circled times = vector product, U+2297 ISOamsb" }, +{ 8869, "perp", "up tack = orthogonal to = perpendicular, U+22A5 ISOtech" }, +{ 8901, "sdot", "dot operator, U+22C5 ISOamsb" }, +{ 8968, "lceil","left ceiling = apl upstile, U+2308 ISOamsc" }, +{ 8969, "rceil","right ceiling, U+2309 ISOamsc" }, +{ 8970, "lfloor","left floor = apl downstile, U+230A ISOamsc" }, +{ 8971, "rfloor","right floor, U+230B ISOamsc" }, +{ 9001, "lang", "left-pointing angle bracket = bra, U+2329 ISOtech" }, +{ 9002, "rang", "right-pointing angle bracket = ket, U+232A ISOtech" }, +{ 9674, "loz", "lozenge, U+25CA ISOpub" }, + +{ 9824, "spades","black spade suit, U+2660 ISOpub" }, +{ 9827, "clubs","black club suit = shamrock, U+2663 ISOpub" }, +{ 9829, "hearts","black heart suit = valentine, U+2665 ISOpub" }, +{ 9830, "diams","black diamond suit, U+2666 ISOpub" }, + +}; + +/************************************************************************ + * * + * Commodity functions to handle entities * + * * + ************************************************************************/ + +/** + * htmlEntityLookup: + * @name: the entity name + * + * Lookup the given entity in EntitiesTable + * + * TODO: the linear scan is really ugly, an hash table is really needed. + * + * Returns the associated htmlEntityDescPtr if found, NULL otherwise. + */ +const htmlEntityDesc * +htmlEntityLookup(const xmlChar *name) { + unsigned int i; + + for (i = 0;i < (sizeof(html40EntitiesTable)/ + sizeof(html40EntitiesTable[0]));i++) { + if (xmlStrEqual(name, BAD_CAST html40EntitiesTable[i].name)) { + return((htmlEntityDescPtr) &html40EntitiesTable[i]); + } + } + return(NULL); +} + +static int +htmlCompareEntityDesc(const void *vkey, const void *vdesc) { + const unsigned *key = vkey; + const htmlEntityDesc *desc = vdesc; + + return((int) *key - (int) desc->value); +} + +/** + * htmlEntityValueLookup: + * @value: the entity's unicode value + * + * Lookup the given entity in EntitiesTable + * + * TODO: the linear scan is really ugly, an hash table is really needed. + * + * Returns the associated htmlEntityDescPtr if found, NULL otherwise. + */ +const htmlEntityDesc * +htmlEntityValueLookup(unsigned int value) { + const htmlEntityDesc *desc; + size_t nmemb; + + nmemb = sizeof(html40EntitiesTable) / sizeof(html40EntitiesTable[0]); + desc = bsearch(&value, html40EntitiesTable, nmemb, sizeof(htmlEntityDesc), + htmlCompareEntityDesc); + + return(desc); +} + +/** + * UTF8ToHtml: + * @out: a pointer to an array of bytes to store the result + * @outlen: the length of @out + * @in: a pointer to an array of UTF-8 chars + * @inlen: the length of @in + * + * Take a block of UTF-8 chars in and try to convert it to an ASCII + * plus HTML entities block of chars out. + * + * Returns 0 if success, -2 if the transcoding fails, or -1 otherwise + * The value of @inlen after return is the number of octets consumed + * as the return value is positive, else unpredictable. + * The value of @outlen after return is the number of octets consumed. + */ +int +UTF8ToHtml(unsigned char* out, int *outlen, + const unsigned char* in, int *inlen) { + const unsigned char* instart = in; + const unsigned char* inend; + unsigned char* outstart = out; + unsigned char* outend; + int ret = XML_ENC_ERR_SPACE; + + if ((out == NULL) || (outlen == NULL) || (inlen == NULL)) + return(XML_ENC_ERR_INTERNAL); + + if (in == NULL) { + /* + * initialization nothing to do + */ + *outlen = 0; + *inlen = 0; + return(XML_ENC_ERR_SUCCESS); + } + + inend = in + *inlen; + outend = out + *outlen; + while (in < inend) { + const htmlEntityDesc *ent; + const char *cp; + char nbuf[16]; + unsigned c, d; + int seqlen, len, i; + + d = *in; + + if (d < 0x80) { + if (out >= outend) + goto done; + *out++ = d; + in += 1; + continue; + } + + if (d < 0xE0) { c = d & 0x1F; seqlen = 2; } + else if (d < 0xF0) { c = d & 0x0F; seqlen = 3; } + else { c = d & 0x07; seqlen = 4; } + + if (inend - in < seqlen) + break; + + for (i = 1; i < seqlen; i++) { + d = in[i]; + c <<= 6; + c |= d & 0x3F; + } + + /* + * Try to lookup a predefined HTML entity for it + */ + ent = htmlEntityValueLookup(c); + + if (ent == NULL) { + snprintf(nbuf, sizeof(nbuf), "#%u", c); + cp = nbuf; + } else { + cp = ent->name; + } + + len = strlen(cp); + if (outend - out < len + 2) + goto done; + + *out++ = '&'; + memcpy(out, cp, len); + out += len; + *out++ = ';'; + + in += seqlen; + } + + ret = out - outstart; + +done: + *outlen = out - outstart; + *inlen = in - instart; + return(ret); +} + +/** + * htmlEncodeEntities: + * @out: a pointer to an array of bytes to store the result + * @outlen: the length of @out + * @in: a pointer to an array of UTF-8 chars + * @inlen: the length of @in + * @quoteChar: the quote character to escape (' or ") or zero. + * + * Take a block of UTF-8 chars in and try to convert it to an ASCII + * plus HTML entities block of chars out. + * + * Returns 0 if success, -2 if the transcoding fails, or -1 otherwise + * The value of @inlen after return is the number of octets consumed + * as the return value is positive, else unpredictable. + * The value of @outlen after return is the number of octets consumed. + */ +int +htmlEncodeEntities(unsigned char* out, int *outlen, + const unsigned char* in, int *inlen, int quoteChar) { + const unsigned char* processed = in; + const unsigned char* outend; + const unsigned char* outstart = out; + const unsigned char* instart = in; + const unsigned char* inend; + unsigned int c, d; + int trailing; + + if ((out == NULL) || (outlen == NULL) || (inlen == NULL) || (in == NULL)) + return(-1); + outend = out + (*outlen); + inend = in + (*inlen); + while (in < inend) { + d = *in++; + if (d < 0x80) { c= d; trailing= 0; } + else if (d < 0xC0) { + /* trailing byte in leading position */ + *outlen = out - outstart; + *inlen = processed - instart; + return(-2); + } else if (d < 0xE0) { c= d & 0x1F; trailing= 1; } + else if (d < 0xF0) { c= d & 0x0F; trailing= 2; } + else if (d < 0xF8) { c= d & 0x07; trailing= 3; } + else { + /* no chance for this in Ascii */ + *outlen = out - outstart; + *inlen = processed - instart; + return(-2); + } + + if (inend - in < trailing) + break; + + while (trailing--) { + if (((d= *in++) & 0xC0) != 0x80) { + *outlen = out - outstart; + *inlen = processed - instart; + return(-2); + } + c <<= 6; + c |= d & 0x3F; + } + + /* assertion: c is a single UTF-4 value */ + if ((c < 0x80) && (c != (unsigned int) quoteChar) && + (c != '&') && (c != '<') && (c != '>')) { + if (out >= outend) + break; + *out++ = c; + } else { + const htmlEntityDesc * ent; + const char *cp; + char nbuf[16]; + int len; + + /* + * Try to lookup a predefined HTML entity for it + */ + ent = htmlEntityValueLookup(c); + if (ent == NULL) { + snprintf(nbuf, sizeof(nbuf), "#%u", c); + cp = nbuf; + } + else + cp = ent->name; + len = strlen(cp); + if (outend - out < len + 2) + break; + *out++ = '&'; + memcpy(out, cp, len); + out += len; + *out++ = ';'; + } + processed = in; + } + *outlen = out - outstart; + *inlen = processed - instart; + return(0); +} + +/************************************************************************ + * * + * Commodity functions, cleanup needed ? * + * * + ************************************************************************/ +/* + * all tags allowing pc data from the html 4.01 loose dtd + * NOTE: it might be more appropriate to integrate this information + * into the html40ElementTable array but I don't want to risk any + * binary incompatibility + */ +static const char *allowPCData[] = { + "a", "abbr", "acronym", "address", "applet", "b", "bdo", "big", + "blockquote", "body", "button", "caption", "center", "cite", "code", + "dd", "del", "dfn", "div", "dt", "em", "font", "form", "h1", "h2", + "h3", "h4", "h5", "h6", "i", "iframe", "ins", "kbd", "label", "legend", + "li", "noframes", "noscript", "object", "p", "pre", "q", "s", "samp", + "small", "span", "strike", "strong", "td", "th", "tt", "u", "var" +}; + +/** + * areBlanks: + * @ctxt: an HTML parser context + * @str: a xmlChar * + * @len: the size of @str + * + * Is this a sequence of blank chars that one can ignore ? + * + * Returns 1 if ignorable 0 if whitespace, -1 otherwise. + */ + +static int areBlanks(htmlParserCtxtPtr ctxt, const xmlChar *str, int len) { + unsigned int i; + int j; + xmlNodePtr lastChild; + xmlDtdPtr dtd; + + for (j = 0;j < len;j++) + if (!(IS_WS_HTML(str[j]))) return(-1); + + if (CUR == 0) return(1); + if (CUR != '<') return(0); + if (ctxt->name == NULL) + return(1); + if (xmlStrEqual(ctxt->name, BAD_CAST"html")) + return(1); + if (xmlStrEqual(ctxt->name, BAD_CAST"head")) + return(1); + + /* Only strip CDATA children of the body tag for strict HTML DTDs */ + if (xmlStrEqual(ctxt->name, BAD_CAST "body") && ctxt->myDoc != NULL) { + dtd = xmlGetIntSubset(ctxt->myDoc); + if (dtd != NULL && dtd->ExternalID != NULL) { + if (!xmlStrcasecmp(dtd->ExternalID, BAD_CAST "-//W3C//DTD HTML 4.01//EN") || + !xmlStrcasecmp(dtd->ExternalID, BAD_CAST "-//W3C//DTD HTML 4//EN")) + return(1); + } + } + + if (ctxt->node == NULL) return(0); + lastChild = xmlGetLastChild(ctxt->node); + while ((lastChild) && (lastChild->type == XML_COMMENT_NODE)) + lastChild = lastChild->prev; + if (lastChild == NULL) { + if ((ctxt->node->type != XML_ELEMENT_NODE) && + (ctxt->node->content != NULL)) return(0); + /* keep ws in constructs like ... ... + 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

xy z

+ for all tags "p" allowing PCDATA */ + for ( i = 0; i < sizeof(allowPCData)/sizeof(allowPCData[0]); i++ ) { + if ( xmlStrEqual(lastChild->name, BAD_CAST allowPCData[i]) ) { + return(0); + } + } + } + return(1); +} + +/** + * htmlNewDocNoDtD: + * @URI: URI for the dtd, or NULL + * @ExternalID: the external ID of the DTD, or NULL + * + * Creates a new HTML document without a DTD node if @URI and @ExternalID + * are NULL + * + * Returns a new document, do not initialize the DTD if not provided + */ +htmlDocPtr +htmlNewDocNoDtD(const xmlChar *URI, const xmlChar *ExternalID) { + xmlDocPtr cur; + + /* + * Allocate a new document and fill the fields. + */ + cur = (xmlDocPtr) xmlMalloc(sizeof(xmlDoc)); + if (cur == NULL) + return(NULL); + memset(cur, 0, sizeof(xmlDoc)); + + cur->type = XML_HTML_DOCUMENT_NODE; + cur->version = NULL; + cur->intSubset = NULL; + cur->doc = cur; + cur->name = NULL; + cur->children = NULL; + cur->extSubset = NULL; + cur->oldNs = NULL; + cur->encoding = NULL; + cur->standalone = 1; + cur->compression = 0; + cur->ids = NULL; + cur->refs = NULL; + cur->_private = NULL; + cur->charset = XML_CHAR_ENCODING_UTF8; + cur->properties = XML_DOC_HTML | XML_DOC_USERBUILT; + if ((ExternalID != NULL) || + (URI != NULL)) { + xmlDtdPtr intSubset; + + intSubset = xmlCreateIntSubset(cur, BAD_CAST "html", ExternalID, URI); + if (intSubset == NULL) { + xmlFree(cur); + return(NULL); + } + } + if ((xmlRegisterCallbacks) && (xmlRegisterNodeDefaultValue)) + xmlRegisterNodeDefaultValue((xmlNodePtr)cur); + return(cur); +} + +/** + * htmlNewDoc: + * @URI: URI for the dtd, or NULL + * @ExternalID: the external ID of the DTD, or NULL + * + * Creates a new HTML document + * + * Returns a new document + */ +htmlDocPtr +htmlNewDoc(const xmlChar *URI, const xmlChar *ExternalID) { + if ((URI == NULL) && (ExternalID == NULL)) + return(htmlNewDocNoDtD( + BAD_CAST "http://www.w3.org/TR/REC-html40/loose.dtd", + BAD_CAST "-//W3C//DTD HTML 4.0 Transitional//EN")); + + return(htmlNewDocNoDtD(URI, ExternalID)); +} + + +/************************************************************************ + * * + * The parser itself * + * Relates to http://www.w3.org/TR/html40 * + * * + ************************************************************************/ + +/************************************************************************ + * * + * The parser itself * + * * + ************************************************************************/ + +/** + * htmlParseHTMLName: + * @ctxt: an HTML parser context + * + * parse an HTML tag or attribute name, note that we convert it to lowercase + * since HTML names are not case-sensitive. + * + * Returns the Tag Name parsed or NULL + */ + +static xmlHashedString +htmlParseHTMLName(htmlParserCtxtPtr ctxt, int attr) { + xmlHashedString ret; + xmlChar buf[HTML_PARSER_BUFFER_SIZE]; + const xmlChar *in; + size_t avail; + int eof = PARSER_PROGRESSIVE(ctxt); + int nbchar = 0; + int stop = attr ? '=' : ' '; + + in = ctxt->input->cur; + avail = ctxt->input->end - in; + + while (1) { + int c, size; + + if ((!eof) && (avail < 32)) { + size_t oldAvail = avail; + + ctxt->input->cur = in; + + SHRINK; + xmlParserGrow(ctxt); + + in = ctxt->input->cur; + avail = ctxt->input->end - in; + + if (oldAvail == avail) + eof = 1; + } + + if (avail == 0) + break; + + c = *in; + size = 1; + + if ((nbchar != 0) && + ((c == '/') || (c == '>') || (c == stop) || + (IS_WS_HTML(c)))) + break; + + if (c == 0) { + if (nbchar + 3 <= HTML_PARSER_BUFFER_SIZE) { + buf[nbchar++] = 0xEF; + buf[nbchar++] = 0xBF; + buf[nbchar++] = 0xBD; + } + } else if (c < 0x80) { + if (nbchar < HTML_PARSER_BUFFER_SIZE) { + if (IS_UPPER(c)) + c += 0x20; + buf[nbchar++] = c; + } + } else { + size = htmlValidateUtf8(ctxt, in, avail); + + if (size > 0) { + if (nbchar + size <= HTML_PARSER_BUFFER_SIZE) { + memcpy(buf + nbchar, in, size); + nbchar += size; + } + } else { + size = 1; + + if (nbchar + 3 <= HTML_PARSER_BUFFER_SIZE) { + buf[nbchar++] = 0xEF; + buf[nbchar++] = 0xBF; + buf[nbchar++] = 0xBD; + } + } + } + + in += size; + avail -= size; + } + + ctxt->input->cur = in; + + SHRINK; + + ret = xmlDictLookupHashed(ctxt->dict, buf, nbchar); + if (ret.name == NULL) + htmlErrMemory(ctxt); + + return(ret); +} + +static const short htmlC1Remap[32] = { + 0x20AC, 0x0081, 0x201A, 0x0192, 0x201E, 0x2026, 0x2020, 0x2021, + 0x02C6, 0x2030, 0x0160, 0x2039, 0x0152, 0x008D, 0x017D, 0x008F, + 0x0090, 0x2018, 0x2019, 0x201C, 0x201D, 0x2022, 0x2013, 0x2014, + 0x02DC, 0x2122, 0x0161, 0x203A, 0x0153, 0x009D, 0x017E, 0x0178 +}; + +static const xmlChar * +htmlCodePointToUtf8(int c, xmlChar *out, int *osize) { + int i = 0; + int bits, hi; + + if ((c >= 0x80) && (c < 0xA0)) { + c = htmlC1Remap[c - 0x80]; + } else if ((c <= 0) || + ((c >= 0xD800) && (c < 0xE000)) || + (c > 0x10FFFF)) { + c = 0xFFFD; + } + + if (c < 0x80) { bits = 0; hi = 0x00; } + else if (c < 0x800) { bits = 6; hi = 0xC0; } + else if (c < 0x10000) { bits = 12; hi = 0xE0; } + else { bits = 18; hi = 0xF0; } + + out[i++] = (c >> bits) | hi; + + while (bits > 0) { + bits -= 6; + out[i++] = ((c >> bits) & 0x3F) | 0x80; + } + + *osize = i; + return(out); +} + +#include "html5ent.inc" + +#define ENT_F_SEMICOLON 0x80u +#define ENT_F_SUBTABLE 0x40u +#define ENT_F_ALL 0xC0u + +static const xmlChar * +htmlFindEntityPrefix(const xmlChar *string, size_t slen, int isAttr, + int *nlen, int *rlen) { + const xmlChar *match = NULL; + unsigned left, right; + int first = string[0]; + size_t matchLen = 0; + size_t soff = 1; + + if (slen < 2) + return(NULL); + if (!IS_ASCII_LETTER(first)) + return(NULL); + + /* + * Look up range by first character + */ + first &= 63; + left = htmlEntAlpha[first*3] | htmlEntAlpha[first*3+1] << 8; + right = left + htmlEntAlpha[first*3+2]; + + /* + * Binary search + */ + while (left < right) { + const xmlChar *bytes; + unsigned mid; + size_t len; + int cmp; + + mid = left + (right - left) / 2; + bytes = htmlEntStrings + htmlEntValues[mid]; + len = bytes[0] & ~ENT_F_ALL; + + cmp = string[soff] - bytes[1]; + + if (cmp == 0) { + if (slen < len) { + cmp = strncmp((const char *) string + soff + 1, + (const char *) bytes + 2, + slen - 1); + /* Prefix can never match */ + if (cmp == 0) + break; + } else { + cmp = strncmp((const char *) string + soff + 1, + (const char *) bytes + 2, + len - 1); + } + } + + if (cmp < 0) { + right = mid; + } else if (cmp > 0) { + left = mid + 1; + } else { + int term = soff + len < slen ? string[soff + len] : 0; + int isAlnum, isTerm; + + isAlnum = IS_ALNUM(term); + isTerm = ((term == ';') || + ((bytes[0] & ENT_F_SEMICOLON) && + ((!isAttr) || + ((!isAlnum) && (term != '='))))); + + if (isTerm) { + match = bytes + len + 1; + matchLen = soff + len; + if (term == ';') + matchLen += 1; + } + + if (bytes[0] & ENT_F_SUBTABLE) { + if (isTerm) + match += 2; + + if ((isAlnum) && (soff + len < slen)) { + left = mid + bytes[len + 1]; + right = left + bytes[len + 2]; + soff += len; + continue; + } + } + + break; + } + } + + if (match == NULL) + return(NULL); + + *nlen = matchLen; + *rlen = match[0]; + return(match + 1); +} + +/** + * htmlParseData: + * @ctxt: an HTML parser context + * @mask: mask of terminating characters + * @comment: true if parsing a comment + * @refs: true if references are allowed + * @maxLength: maximum output length + * + * Parse data until terminator is reached. + * + * Returns the parsed string or NULL in case of errors. + */ + +static xmlChar * +htmlParseData(htmlParserCtxtPtr ctxt, htmlAsciiMask mask, + int comment, int refs, int maxLength) { + xmlParserInputPtr input = ctxt->input; + xmlChar *ret = NULL; + xmlChar *buffer; + xmlChar utf8Char[4]; + size_t buffer_size; + size_t used; + int eof = PARSER_PROGRESSIVE(ctxt); + int line, col; + int termSkip = -1; + + used = 0; + buffer_size = ctxt->spaceMax; + buffer = (xmlChar *) ctxt->spaceTab; + if (buffer == NULL) { + buffer_size = 500; + buffer = xmlMalloc(buffer_size + 1); + if (buffer == NULL) { + htmlErrMemory(ctxt); + return(NULL); + } + } + + line = input->line; + col = input->col; + + while (!PARSER_STOPPED(ctxt)) { + const xmlChar *chunk, *in, *repl; + size_t avail, chunkSize, extraSize; + int replSize; + int skip = 0; + int ncr = 0; + int ncrSize = 0; + int cp = 0; + + chunk = input->cur; + avail = input->end - chunk; + in = chunk; + + repl = BAD_CAST ""; + replSize = 0; + + while (!PARSER_STOPPED(ctxt)) { + size_t j; + int cur, size; + + if ((!eof) && (avail <= 64)) { + size_t oldAvail = avail; + size_t off = in - chunk; + + input->cur = in; + + xmlParserGrow(ctxt); + + in = input->cur; + chunk = in - off; + input->cur = chunk; + avail = input->end - in; + + if (oldAvail == avail) + eof = 1; + } + + if (avail == 0) { + termSkip = 0; + break; + } + + cur = *in; + size = 1; + col += 1; + + if (htmlMaskMatch(mask, cur)) { + if (comment) { + if (avail < 2) { + termSkip = 1; + } else if (in[1] == '-') { + if (avail < 3) { + termSkip = 2; + } else if (in[2] == '>') { + termSkip = 3; + } else if (in[2] == '!') { + if (avail < 4) + termSkip = 3; + else if (in[3] == '>') + termSkip = 4; + } + } + + if (termSkip >= 0) + break; + } else { + termSkip = 0; + break; + } + } + + if (ncr) { + int lc = cur | 0x20; + int digit; + + if ((cur >= '0') && (cur <= '9')) { + digit = cur - '0'; + } else if ((ncr == 16) && (lc >= 'a') && (lc <= 'f')) { + digit = (lc - 'a') + 10; + } else { + if (cur == ';') { + in += 1; + size += 1; + ncrSize += 1; + } + goto next_chunk; + } + + cp = cp * ncr + digit; + if (cp >= 0x110000) + cp = 0x110000; + + ncrSize += 1; + + goto next_char; + } + + switch (cur) { + case '&': + if (!refs) + break; + + j = 1; + + if ((j < avail) && (in[j] == '#')) { + j += 1; + if (j < avail) { + if ((in[j] | 0x20) == 'x') { + j += 1; + if ((j < avail) && (IS_HEX_DIGIT(in[j]))) { + ncr = 16; + size = 3; + ncrSize = 3; + cp = 0; + } + } else if (IS_ASCII_DIGIT(in[j])) { + ncr = 10; + size = 2; + ncrSize = 2; + cp = 0; + } + } + } else { + repl = htmlFindEntityPrefix(in + j, + avail - j, + /* isAttr */ 1, + &skip, &replSize); + if (repl != NULL) { + skip += 1; + goto next_chunk; + } + + skip = 0; + } + + break; + + case '\0': + skip = 1; + repl = BAD_CAST "\xEF\xBF\xBD"; + replSize = 3; + goto next_chunk; + + case '\n': + line += 1; + col = 1; + break; + + case '\r': + skip = 1; + if (in[1] != 0x0A) { + repl = BAD_CAST "\x0A"; + replSize = 1; + } + goto next_chunk; + + default: + if (cur < 0x80) + break; + + if ((input->flags & XML_INPUT_HAS_ENCODING) == 0) { + xmlChar * guess; + + guess = htmlFindEncoding(ctxt); + if (guess == NULL) { + xmlSwitchEncoding(ctxt, XML_CHAR_ENCODING_8859_1); + } else { + xmlSwitchEncodingName(ctxt, (const char *) guess); + xmlFree(guess); + } + input->flags |= XML_INPUT_HAS_ENCODING; + + goto restart; + } + + size = htmlValidateUtf8(ctxt, in, avail); + + if (size <= 0) { + skip = 1; + repl = BAD_CAST "\xEF\xBF\xBD"; + replSize = 3; + goto next_chunk; + } + + break; + } + +next_char: + in += size; + avail -= size; + } + +next_chunk: + if (ncrSize > 0) { + skip = ncrSize; + in -= ncrSize; + + repl = htmlCodePointToUtf8(cp, utf8Char, &replSize); + } + + chunkSize = in - chunk; + extraSize = chunkSize + replSize; + + if (extraSize > maxLength - used) { + htmlParseErr(ctxt, XML_ERR_RESOURCE_LIMIT, + "value too long\n", NULL, NULL); + goto error; + } + + if (extraSize > buffer_size - used) { + size_t newSize = (used + extraSize) * 2; + xmlChar *tmp = xmlRealloc(buffer, newSize + 1); + + if (tmp == NULL) { + htmlErrMemory(ctxt); + goto error; + } + buffer = tmp; + buffer_size = newSize; + } + + if (chunkSize > 0) { + input->cur += chunkSize; + memcpy(buffer + used, chunk, chunkSize); + used += chunkSize; + } + + input->cur += skip; + if (replSize > 0) { + memcpy(buffer + used, repl, replSize); + used += replSize; + } + + SHRINK; + + if (termSkip >= 0) + break; + +restart: + ; + } + + if (termSkip > 0) { + input->cur += termSkip; + col += termSkip; + } + + input->line = line; + input->col = col; + + ret = xmlMalloc(used + 1); + if (ret == NULL) { + htmlErrMemory(ctxt); + } else { + memcpy(ret, buffer, used); + ret[used] = 0; + } + +error: + ctxt->spaceTab = (void *) buffer; + ctxt->spaceMax = buffer_size; + + return(ret); +} + +/** + * htmlParseEntityRef: + * @ctxt: an HTML parser context + * @str: location to store the entity name + * + * DEPRECATED: Internal function, don't use. + * + * Returns NULL. + */ +const htmlEntityDesc * +htmlParseEntityRef(htmlParserCtxtPtr ctxt ATTRIBUTE_UNUSED, + const xmlChar **str ATTRIBUTE_UNUSED) { + return(NULL); +} + +/** + * htmlParseAttValue: + * @ctxt: an HTML parser context + * + * parse a value for an attribute + * Note: the parser won't do substitution of entities here, this + * will be handled later in xmlStringGetNodeList, unless it was + * asked for ctxt->replaceEntities != 0 + * + * Returns the AttValue parsed or NULL. + */ + +static xmlChar * +htmlParseAttValue(htmlParserCtxtPtr ctxt) { + xmlChar *ret = NULL; + int maxLength = (ctxt->options & HTML_PARSE_HUGE) ? + XML_MAX_HUGE_LENGTH : + XML_MAX_TEXT_LENGTH; + + if (CUR == '"') { + SKIP(1); + ret = htmlParseData(ctxt, MASK_DQ, 0, 1, maxLength); + if (CUR == '"') + SKIP(1); + } else if (CUR == '\'') { + SKIP(1); + ret = htmlParseData(ctxt, MASK_SQ, 0, 1, maxLength); + if (CUR == '\'') + SKIP(1); + } else { + ret = htmlParseData(ctxt, MASK_WS_GT, 0, 1, maxLength); + } + return(ret); +} + +static void +htmlCharDataSAXCallback(htmlParserCtxtPtr ctxt, const xmlChar *buf, + int size, int mode) { + if ((ctxt->sax == NULL) || (ctxt->disableSAX)) + return; + + if ((mode == 0) || (mode == DATA_RCDATA) || + (ctxt->sax->cdataBlock == NULL)) { + int blank = areBlanks(ctxt, buf, size); + + if ((mode == 0) && (blank > 0) && (!ctxt->keepBlanks)) { + if (ctxt->sax->ignorableWhitespace != NULL) + ctxt->sax->ignorableWhitespace(ctxt->userData, + buf, size); + } else { + if ((mode == 0) && (blank < 0)) + htmlCheckParagraph(ctxt); + + if (ctxt->sax->characters != NULL) + ctxt->sax->characters(ctxt->userData, buf, size); + } + } else { + /* + * Insert as CDATA, which is the same as HTML_PRESERVE_NODE + */ + ctxt->sax->cdataBlock(ctxt->userData, buf, size); + } +} + +/** + * htmlParseCharData: + * @ctxt: an HTML parser context + * @terminate: true if the input buffer is complete + * + * Parse character data and references. + */ + +static int +htmlParseCharData(htmlParserCtxtPtr ctxt) { + xmlParserInputPtr input = ctxt->input; + xmlChar utf8Char[4]; + int complete = 0; + int done = 0; + int mode; + int eof = PARSER_PROGRESSIVE(ctxt); + int line, col; + + mode = ctxt->endCheckState; + + line = input->line; + col = input->col; + + while (!PARSER_STOPPED(ctxt)) { + const xmlChar *chunk, *in, *repl; + size_t avail; + int replSize; + int skip = 0; + int ncr = 0; + int ncrSize = 0; + int cp = 0; + + chunk = input->cur; + avail = input->end - chunk; + in = chunk; + + repl = BAD_CAST ""; + replSize = 0; + + while (!PARSER_STOPPED(ctxt)) { + size_t j; + int cur, size; + + if (avail <= 64) { + if (!eof) { + size_t oldAvail = avail; + size_t off = in - chunk; + + input->cur = in; + + xmlParserGrow(ctxt); + + in = input->cur; + chunk = in - off; + input->cur = chunk; + avail = input->end - in; + + if (oldAvail == avail) + eof = 1; + } + + if (avail == 0) { + done = 1; + break; + } + } + + /* Accelerator */ + if (!ncr) { + while (avail > 0) { + static const unsigned mask[8] = { + 0x00002401, 0x10002040, + 0x00000000, 0x00000000, + 0xFFFFFFFF, 0xFFFFFFFF, + 0xFFFFFFFF, 0xFFFFFFFF + }; + cur = *in; + if ((1u << (cur & 0x1F)) & mask[cur >> 5]) + break; + col += 1; + in += 1; + avail -= 1; + } + + if ((!eof) && (avail <= 64)) + continue; + if (avail == 0) + continue; + } + + cur = *in; + size = 1; + col += 1; + + if (ncr) { + int lc = cur | 0x20; + int digit; + + if ((cur >= '0') && (cur <= '9')) { + digit = cur - '0'; + } else if ((ncr == 16) && (lc >= 'a') && (lc <= 'f')) { + digit = (lc - 'a') + 10; + } else { + if (cur == ';') { + in += 1; + size += 1; + ncrSize += 1; + } + goto next_chunk; + } + + cp = cp * ncr + digit; + if (cp >= 0x110000) + cp = 0x110000; + + ncrSize += 1; + + goto next_char; + } + + switch (cur) { + case '<': + if (mode == 0) { + done = 1; + goto next_chunk; + } + if (mode == DATA_PLAINTEXT) + break; + + j = 1; + if (j < avail) { + if ((mode == DATA_SCRIPT) && (in[j] == '!')) { + /* Check for comment start */ + + j += 1; + if ((j < avail) && (in[j] == '-')) { + j += 1; + if ((j < avail) && (in[j] == '-')) + mode = DATA_SCRIPT_ESC1; + } + } else { + int i = 0; + int solidus = 0; + + /* Check for tag */ + + if (in[j] == '/') { + j += 1; + solidus = 1; + } + + if ((solidus) || (mode == DATA_SCRIPT_ESC1)) { + while ((j < avail) && + (ctxt->name[i] != 0) && + (ctxt->name[i] == (in[j] | 0x20))) { + i += 1; + j += 1; + } + + if ((ctxt->name[i] == 0) && (j < avail)) { + int c = in[j]; + + if ((c == '>') || (c == '/') || + (IS_WS_HTML(c))) { + if ((mode == DATA_SCRIPT_ESC1) && + (!solidus)) { + mode = DATA_SCRIPT_ESC2; + } else if (mode == DATA_SCRIPT_ESC2) { + mode = DATA_SCRIPT_ESC1; + } else { + complete = 1; + done = 1; + goto next_chunk; + } + } + } + } + } + } + + if ((mode != 0) && (PARSER_PROGRESSIVE(ctxt))) { + in += 1; + done = 1; + goto next_chunk; + } + + break; + + case '-': + if ((mode != DATA_SCRIPT_ESC1) && (mode != DATA_SCRIPT_ESC2)) + break; + + /* Check for comment end */ + + j = 1; + if ((j < avail) && (in[j] == '-')) { + j += 1; + if ((j < avail) && (in[j] == '>')) + mode = DATA_SCRIPT; + } + + break; + + case '&': + if ((mode != 0) && (mode != DATA_RCDATA)) + break; + + j = 1; + + if ((j < avail) && (in[j] == '#')) { + j += 1; + if (j < avail) { + if ((in[j] | 0x20) == 'x') { + j += 1; + if ((j < avail) && (IS_HEX_DIGIT(in[j]))) { + ncr = 16; + size = 3; + ncrSize = 3; + cp = 0; + } + } else if (IS_ASCII_DIGIT(in[j])) { + ncr = 10; + size = 2; + ncrSize = 2; + cp = 0; + } + } + } else { + repl = htmlFindEntityPrefix(in + j, + avail - j, + /* isAttr */ 0, + &skip, &replSize); + if (repl != NULL) { + skip += 1; + goto next_chunk; + } + + skip = 0; + } + + break; + + case '\0': + skip = 1; + repl = BAD_CAST "\xEF\xBF\xBD"; + replSize = 3; + goto next_chunk; + + case '\n': + line += 1; + col = 1; + break; + + case '\r': + skip = 1; + if (in[1] != 0x0A) { + repl = BAD_CAST "\x0A"; + replSize = 1; + } + goto next_chunk; + + default: + if (cur < 0x80) + break; + + if ((input->flags & XML_INPUT_HAS_ENCODING) == 0) { + xmlChar * guess; + + guess = htmlFindEncoding(ctxt); + if (guess == NULL) { + xmlSwitchEncoding(ctxt, XML_CHAR_ENCODING_8859_1); + } else { + xmlSwitchEncodingName(ctxt, (const char *) guess); + xmlFree(guess); + } + input->flags |= XML_INPUT_HAS_ENCODING; + + goto restart; + } + + size = htmlValidateUtf8(ctxt, in, avail); + + if (size <= 0) { + skip = 1; + repl = BAD_CAST "\xEF\xBF\xBD"; + replSize = 3; + goto next_chunk; + } + + break; + } + +next_char: + in += size; + avail -= size; + } + +next_chunk: + if (ncrSize > 0) { + skip = ncrSize; + in -= ncrSize; + + repl = htmlCodePointToUtf8(cp, utf8Char, &replSize); + } + + if (in > chunk) { + input->cur += in - chunk; + htmlCharDataSAXCallback(ctxt, chunk, in - chunk, mode); + } + + input->cur += skip; + if (replSize > 0) + htmlCharDataSAXCallback(ctxt, repl, replSize, mode); + + SHRINK; + + if (done) + break; + +restart: + ; + } + + input->line = line; + input->col = col; + + if (complete) + ctxt->endCheckState = 0; + else + ctxt->endCheckState = mode; + + return(complete); +} + +/** + * htmlParseComment: + * @ctxt: an HTML parser context + * @bogus: true if this is a bogus comment + * + * Parse an HTML comment + */ +static void +htmlParseComment(htmlParserCtxtPtr ctxt, int bogus) { + const xmlChar *comment = BAD_CAST ""; + xmlChar *buf = NULL; + int maxLength = (ctxt->options & HTML_PARSE_HUGE) ? + XML_MAX_HUGE_LENGTH : + XML_MAX_TEXT_LENGTH; + + if (bogus) { + buf = htmlParseData(ctxt, MASK_GT, 0, 0, maxLength); + if (CUR == '>') + SKIP(1); + comment = buf; + } else { + if (CUR == '>') { + SKIP(1); + } else if ((CUR == '-') && (NXT(1) == '>')) { + SKIP(2); + } else { + buf = htmlParseData(ctxt, MASK_DASH, 1, 0, maxLength); + comment = buf; + } + } + + if (comment == NULL) + return; + + if ((ctxt->sax != NULL) && (ctxt->sax->comment != NULL) && + (!ctxt->disableSAX)) + ctxt->sax->comment(ctxt->userData, comment); + + xmlFree(buf); +} + +/** + * htmlParseCharRef: + * @ctxt: an HTML parser context + * + * DEPRECATED: Internal function, don't use. + * + * Returns 0 + */ +int +htmlParseCharRef(htmlParserCtxtPtr ctxt ATTRIBUTE_UNUSED) { + return(0); +} + + +/** + * htmlParseDoctypeLiteral: + * @ctxt: an HTML parser context + * + * Parse a DOCTYPE SYTSTEM or PUBLIC literal. + * + * Returns the literal or NULL in case of error. + */ + +static xmlChar * +htmlParseDoctypeLiteral(htmlParserCtxtPtr ctxt) { + xmlChar *ret; + int maxLength = (ctxt->options & HTML_PARSE_HUGE) ? + XML_MAX_TEXT_LENGTH : + XML_MAX_NAME_LENGTH; + + if (CUR == '"') { + SKIP(1); + ret = htmlParseData(ctxt, MASK_DQ_GT, 0, 0, maxLength); + if (CUR == '"') + SKIP(1); + } else if (CUR == '\'') { + SKIP(1); + ret = htmlParseData(ctxt, MASK_SQ_GT, 0, 0, maxLength); + if (CUR == '\'') + SKIP(1); + } else { + return(NULL); + } + + return(ret); +} + +static void +htmlSkipBogusDoctype(htmlParserCtxtPtr ctxt) { + const xmlChar *in; + size_t avail; + int eof = PARSER_PROGRESSIVE(ctxt); + int line, col; + + line = ctxt->input->line; + col = ctxt->input->col; + + in = ctxt->input->cur; + avail = ctxt->input->end - in; + + while (!PARSER_STOPPED(ctxt)) { + int cur; + + if ((!eof) && (avail <= 64)) { + size_t oldAvail = avail; + + ctxt->input->cur = in; + + xmlParserGrow(ctxt); + + in = ctxt->input->cur; + avail = ctxt->input->end - in; + + if (oldAvail == avail) + eof = 1; + } + + if (avail == 0) + break; + + col += 1; + + cur = *in; + if (cur == '>') { + in += 1; + break; + } else if (cur == 0x0A) { + line += 1; + col = 1; + } + + in += 1; + avail -= 1; + + SHRINK; + } + + ctxt->input->cur = in; + ctxt->input->line = line; + ctxt->input->col = col; +} + +/** + * htmlParseDocTypeDecl: + * @ctxt: an HTML parser context + * + * Parse a DOCTYPE declaration. + */ + +static void +htmlParseDocTypeDecl(htmlParserCtxtPtr ctxt) { + xmlChar *name = NULL; + xmlChar *publicId = NULL; + xmlChar *URI = NULL; + int maxLength = (ctxt->options & HTML_PARSE_HUGE) ? + XML_MAX_TEXT_LENGTH : + XML_MAX_NAME_LENGTH; + + /* + * We know that 'input->cur < ctxt->input->end) && (CUR != '>')) { + name = htmlParseData(ctxt, MASK_WS_GT, 0, 0, maxLength); + + if ((ctxt->options & HTML_PARSE_HTML5) && (name != NULL)) { + xmlChar *cur; + + for (cur = name; *cur; cur++) { + if (IS_UPPER(*cur)) + *cur += 0x20; + } + } + + SKIP_BLANKS; + } + + /* + * Check for SystemID and publicId + */ + if ((UPPER == 'P') && (UPP(1) == 'U') && + (UPP(2) == 'B') && (UPP(3) == 'L') && + (UPP(4) == 'I') && (UPP(5) == 'C')) { + SKIP(6); + SKIP_BLANKS; + publicId = htmlParseDoctypeLiteral(ctxt); + if (publicId == NULL) + goto bogus; + SKIP_BLANKS; + URI = htmlParseDoctypeLiteral(ctxt); + } else if ((UPPER == 'S') && (UPP(1) == 'Y') && + (UPP(2) == 'S') && (UPP(3) == 'T') && + (UPP(4) == 'E') && (UPP(5) == 'M')) { + SKIP(6); + SKIP_BLANKS; + URI = htmlParseDoctypeLiteral(ctxt); + } + +bogus: + htmlSkipBogusDoctype(ctxt); + + /* + * Create or update the document accordingly to the DOCTYPE + */ + if ((ctxt->sax != NULL) && (ctxt->sax->internalSubset != NULL) && + (!ctxt->disableSAX)) + ctxt->sax->internalSubset(ctxt->userData, name, publicId, URI); + + xmlFree(name); + xmlFree(URI); + xmlFree(publicId); +} + +/** + * htmlParseAttribute: + * @ctxt: an HTML parser context + * @value: a xmlChar ** used to store the value of the attribute + * + * parse an attribute + * + * [41] Attribute ::= Name Eq AttValue + * + * [25] Eq ::= S? '=' S? + * + * With namespace: + * + * [NS 11] Attribute ::= QName Eq AttValue + * + * Also the case QName == xmlns:??? is handled independently as a namespace + * definition. + * + * Returns the attribute name, and the value in *value. + */ + +static xmlHashedString +htmlParseAttribute(htmlParserCtxtPtr ctxt, xmlChar **value) { + xmlHashedString hname; + xmlChar *val = NULL; + + *value = NULL; + hname = htmlParseHTMLName(ctxt, 1); + if (hname.name == NULL) + return(hname); + + /* + * read the value + */ + SKIP_BLANKS; + if (CUR == '=') { + SKIP(1); + SKIP_BLANKS; + val = htmlParseAttValue(ctxt); + } + + *value = val; + return(hname); +} + +/** + * htmlCheckEncoding: + * @ctxt: an HTML parser context + * @attvalue: the attribute value + * + * Checks an http-equiv attribute from a Meta tag to detect + * the encoding + * If a new encoding is detected the parser is switched to decode + * it and pass UTF8 + */ +static void +htmlCheckEncoding(htmlParserCtxtPtr ctxt, const xmlChar *attvalue) { + const xmlChar *encoding; + xmlChar *copy; + + if (!attvalue) + return; + + encoding = xmlStrcasestr(attvalue, BAD_CAST"charset"); + if (encoding != NULL) { + encoding += 7; + } + /* + * skip blank + */ + if (encoding && IS_WS_HTML(*encoding)) + encoding = xmlStrcasestr(attvalue, BAD_CAST"="); + if (encoding && *encoding == '=') { + encoding ++; + copy = xmlStrdup(encoding); + if (copy == NULL) + htmlErrMemory(ctxt); + xmlSetDeclaredEncoding(ctxt, copy); + } +} + +/** + * htmlCheckMeta: + * @ctxt: an HTML parser context + * @atts: the attributes values + * + * Checks an attributes from a Meta tag + */ +static void +htmlCheckMeta(htmlParserCtxtPtr ctxt, const xmlChar **atts) { + int i; + const xmlChar *att, *value; + int http = 0; + const xmlChar *content = NULL; + + if ((ctxt == NULL) || (atts == NULL)) + return; + + i = 0; + att = atts[i++]; + while (att != NULL) { + value = atts[i++]; + if (value != NULL) { + if ((!xmlStrcasecmp(att, BAD_CAST "http-equiv")) && + (!xmlStrcasecmp(value, BAD_CAST "Content-Type"))) { + http = 1; + } else if (!xmlStrcasecmp(att, BAD_CAST "charset")) { + xmlChar *copy; + + copy = xmlStrdup(value); + if (copy == NULL) + htmlErrMemory(ctxt); + xmlSetDeclaredEncoding(ctxt, copy); + } else if (!xmlStrcasecmp(att, BAD_CAST "content")) { + content = value; + } + } + att = atts[i++]; + } + if ((http) && (content != NULL)) + htmlCheckEncoding(ctxt, content); + +} + +/** + * htmlAttrHashInsert: + * @ctxt: parser context + * @size: size of the hash table + * @name: attribute name + * @hashValue: hash value of name + * @aindex: attribute index (this is a multiple of 5) + * + * Inserts a new attribute into the hash table. + * + * Returns INT_MAX if no existing attribute was found, the attribute + * index if an attribute was found, -1 if a memory allocation failed. + */ +static int +htmlAttrHashInsert(xmlParserCtxtPtr ctxt, unsigned size, const xmlChar *name, + unsigned hashValue, int aindex) { + xmlAttrHashBucket *table = ctxt->attrHash; + xmlAttrHashBucket *bucket; + unsigned hindex; + + hindex = hashValue & (size - 1); + bucket = &table[hindex]; + + while (bucket->index >= 0) { + const xmlChar **atts = &ctxt->atts[bucket->index]; + + if (name == atts[0]) + return(bucket->index); + + hindex++; + bucket++; + if (hindex >= size) { + hindex = 0; + bucket = table; + } + } + + bucket->index = aindex; + + return(INT_MAX); +} + +/** + * htmlParseStartTag: + * @ctxt: an HTML parser context + * + * parse a start of tag either for rule element or + * EmptyElement. In both case we don't parse the tag closing chars. + * + * [40] STag ::= '<' Name (S Attribute)* S? '>' + * + * [44] EmptyElemTag ::= '<' Name (S Attribute)* S? '/>' + * + * With namespace: + * + * [NS 8] STag ::= '<' QName (S Attribute)* S? '>' + * + * [NS 10] EmptyElement ::= '<' QName (S Attribute)* S? '/>' + * + * Returns 0 in case of success, -1 in case of error and 1 if discarded + */ + +static void +htmlParseStartTag(htmlParserCtxtPtr ctxt) { + const xmlChar *name; + const xmlChar *attname; + xmlChar *attvalue; + const xmlChar **atts; + int nbatts = 0; + int maxatts; + int meta = 0; + int i; + int discardtag = 0; + + ctxt->endCheckState = 0; + + SKIP(1); + + atts = ctxt->atts; + maxatts = ctxt->maxatts; + + GROW; + name = htmlParseHTMLName(ctxt, 0).name; + if (name == NULL) + return; + if (xmlStrEqual(name, BAD_CAST"meta")) + meta = 1; + + if ((ctxt->options & HTML_PARSE_HTML5) == 0) { + /* + * Check for auto-closure of HTML elements. + */ + htmlAutoClose(ctxt, name); + + /* + * Check for implied HTML elements. + */ + htmlCheckImplied(ctxt, name); + + /* + * Avoid html at any level > 0, head at any level != 1 + * or any attempt to recurse body + */ + if ((ctxt->nameNr > 0) && (xmlStrEqual(name, BAD_CAST"html"))) { + htmlParseErr(ctxt, XML_HTML_STRUCURE_ERROR, + "htmlParseStartTag: misplaced tag\n", + name, NULL); + discardtag = 1; + ctxt->depth++; + } + if ((ctxt->nameNr != 1) && + (xmlStrEqual(name, BAD_CAST"head"))) { + htmlParseErr(ctxt, XML_HTML_STRUCURE_ERROR, + "htmlParseStartTag: misplaced tag\n", + name, NULL); + discardtag = 1; + ctxt->depth++; + } + if (xmlStrEqual(name, BAD_CAST"body")) { + int indx; + for (indx = 0;indx < ctxt->nameNr;indx++) { + if (xmlStrEqual(ctxt->nameTab[indx], BAD_CAST"body")) { + htmlParseErr(ctxt, XML_HTML_STRUCURE_ERROR, + "htmlParseStartTag: misplaced tag\n", + name, NULL); + discardtag = 1; + ctxt->depth++; + } + } + } + } + + /* + * Now parse the attributes, it ends up with the ending + * + * (S Attribute)* S? + */ + SKIP_BLANKS; + while ((ctxt->input->cur < ctxt->input->end) && + (CUR != '>') && + ((CUR != '/') || (NXT(1) != '>')) && + (PARSER_STOPPED(ctxt) == 0)) { + xmlHashedString hattname; + + /* unexpected-solidus-in-tag */ + if (CUR == '/') { + SKIP(1); + SKIP_BLANKS; + continue; + } + GROW; + hattname = htmlParseAttribute(ctxt, &attvalue); + attname = hattname.name; + + if (attname != NULL) { + /* + * Add the pair to atts + */ + if (nbatts + 4 > maxatts) { + const xmlChar **tmp; + unsigned *utmp; + int newSize; + + newSize = xmlGrowCapacity(maxatts, + sizeof(tmp[0]) * 2 + sizeof(utmp[0]), + 11, HTML_MAX_ATTRS); + if (newSize < 0) { + htmlErrMemory(ctxt); + goto failed; + } +#ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION + if (newSize < 2) + newSize = 2; +#endif + tmp = xmlRealloc(atts, newSize * sizeof(tmp[0]) * 2); + if (tmp == NULL) { + htmlErrMemory(ctxt); + goto failed; + } + atts = tmp; + ctxt->atts = tmp; + + utmp = xmlRealloc(ctxt->attallocs, newSize * sizeof(utmp[0])); + if (utmp == NULL) { + htmlErrMemory(ctxt); + goto failed; + } + ctxt->attallocs = utmp; + + maxatts = newSize * 2; + ctxt->maxatts = maxatts; + } + + ctxt->attallocs[nbatts/2] = hattname.hashValue; + atts[nbatts++] = attname; + atts[nbatts++] = attvalue; + + attvalue = NULL; + } + +failed: + if (attvalue != NULL) + xmlFree(attvalue); + + SKIP_BLANKS; + } + + if (ctxt->input->cur >= ctxt->input->end) { + discardtag = 1; + goto done; + } + + /* + * Verify that attribute names are unique. + */ + if (nbatts > 2) { + unsigned attrHashSize; + int j, k; + + attrHashSize = 4; + while (attrHashSize / 2 < (unsigned) nbatts / 2) + attrHashSize *= 2; + + if (attrHashSize > ctxt->attrHashMax) { + xmlAttrHashBucket *tmp; + + tmp = xmlRealloc(ctxt->attrHash, attrHashSize * sizeof(tmp[0])); + if (tmp == NULL) { + htmlErrMemory(ctxt); + goto done; + } + + ctxt->attrHash = tmp; + ctxt->attrHashMax = attrHashSize; + } + + memset(ctxt->attrHash, -1, attrHashSize * sizeof(ctxt->attrHash[0])); + + for (i = 0, j = 0, k = 0; i < nbatts; i += 2, k++) { + unsigned hashValue; + int res; + + attname = atts[i]; + hashValue = ctxt->attallocs[k] | 0x80000000; + + res = htmlAttrHashInsert(ctxt, attrHashSize, attname, + hashValue, j); + if (res < 0) + continue; + + if (res == INT_MAX) { + atts[j] = atts[i]; + atts[j+1] = atts[i+1]; + j += 2; + } else { + xmlFree((xmlChar *) atts[i+1]); + } + } + + nbatts = j; + } + + if (nbatts > 0) { + atts[nbatts] = NULL; + atts[nbatts + 1] = NULL; + + /* + * Handle specific association to the META tag + */ + if (meta) + htmlCheckMeta(ctxt, atts); + } + + /* + * SAX: Start of Element ! + */ + if (!discardtag) { + if (ctxt->options & HTML_PARSE_HTML5) { + if (ctxt->nameNr > 0) + htmlnamePop(ctxt); + } + + htmlnamePush(ctxt, name); + if ((ctxt->sax != NULL) && (ctxt->sax->startElement != NULL)) { + if (nbatts != 0) + ctxt->sax->startElement(ctxt->userData, name, atts); + else + ctxt->sax->startElement(ctxt->userData, name, NULL); + } + } + +done: + if (atts != NULL) { + for (i = 1;i < nbatts;i += 2) { + if (atts[i] != NULL) + xmlFree((xmlChar *) atts[i]); + } + } +} + +/** + * htmlParseEndTag: + * @ctxt: an HTML parser context + * + * parse an end of tag + * + * [42] ETag ::= '' + * + * With namespace + * + * [NS 9] ETag ::= '' + * + * Returns 1 if the current level should be closed. + */ + +static void +htmlParseEndTag(htmlParserCtxtPtr ctxt) +{ + const xmlChar *name; + const xmlChar *oldname; + int i; + + ctxt->endCheckState = 0; + + SKIP(2); + + if (CUR == '>') { + SKIP(1); + return; + } + + if (!IS_ASCII_LETTER(CUR)) { + htmlParseComment(ctxt, /* bogus */ 1); + return; + } + + name = htmlParseHTMLName(ctxt, 0).name; + if (name == NULL) + return; + + /* + * Parse and ignore attributes. + */ + SKIP_BLANKS; + while ((ctxt->input->cur < ctxt->input->end) && + (CUR != '>') && + ((CUR != '/') || (NXT(1) != '>')) && + (ctxt->instate != XML_PARSER_EOF)) { + xmlChar *attvalue = NULL; + + /* unexpected-solidus-in-tag */ + if (CUR == '/') { + SKIP(1); + SKIP_BLANKS; + continue; + } + GROW; + htmlParseAttribute(ctxt, &attvalue); + if (attvalue != NULL) + xmlFree(attvalue); + + SKIP_BLANKS; + } + + if (CUR == '>') { + SKIP(1); + } else if ((CUR == '/') && (NXT(1) == '>')) { + SKIP(2); + } else { + return; + } + + if (ctxt->options & HTML_PARSE_HTML5) { + if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL)) + ctxt->sax->endElement(ctxt->userData, name); + return; + } + + /* + * if we ignored misplaced tags in htmlParseStartTag don't pop them + * out now. + */ + if ((ctxt->depth > 0) && + (xmlStrEqual(name, BAD_CAST "html") || + xmlStrEqual(name, BAD_CAST "body") || + xmlStrEqual(name, BAD_CAST "head"))) { + ctxt->depth--; + return; + } + + /* + * If the name read is not one of the element in the parsing stack + * then return, it's just an error. + */ + for (i = (ctxt->nameNr - 1); i >= 0; i--) { + if (xmlStrEqual(name, ctxt->nameTab[i])) + break; + } + if (i < 0) { + htmlParseErr(ctxt, XML_ERR_TAG_NAME_MISMATCH, + "Unexpected end tag : %s\n", name, NULL); + return; + } + + + /* + * Check for auto-closure of HTML elements. + */ + + htmlAutoCloseOnClose(ctxt, name); + + /* + * Well formedness constraints, opening and closing must match. + * With the exception that the autoclose may have popped stuff out + * of the stack. + */ + if ((ctxt->name != NULL) && (!xmlStrEqual(ctxt->name, name))) { + htmlParseErr(ctxt, XML_ERR_TAG_NAME_MISMATCH, + "Opening and ending tag mismatch: %s and %s\n", + name, ctxt->name); + } + + /* + * SAX: End of Tag + */ + oldname = ctxt->name; + if ((oldname != NULL) && (xmlStrEqual(oldname, name))) { + htmlParserFinishElementParsing(ctxt); + if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL)) + ctxt->sax->endElement(ctxt->userData, name); + htmlnamePop(ctxt); + } +} + +/** + * htmlParseContent: + * @ctxt: an HTML parser context + * + * Parse a content: comment, sub-element, reference or text. + * New version for non recursive htmlParseElementInternal + */ + +static void +htmlParseContent(htmlParserCtxtPtr ctxt) { + GROW; + + while ((PARSER_STOPPED(ctxt) == 0) && + (ctxt->input->cur < ctxt->input->end)) { + int mode; + + mode = ctxt->endCheckState; + + if ((mode == 0) && (CUR == '<')) { + if (NXT(1) == '/') { + htmlParseEndTag(ctxt); + } else if (NXT(1) == '!') { + /* + * Sometimes DOCTYPE arrives in the middle of the document + */ + if ((UPP(2) == 'D') && (UPP(3) == 'O') && + (UPP(4) == 'C') && (UPP(5) == 'T') && + (UPP(6) == 'Y') && (UPP(7) == 'P') && + (UPP(8) == 'E')) { + htmlParseDocTypeDecl(ctxt); + } else if ((NXT(2) == '-') && (NXT(3) == '-')) { + SKIP(4); + htmlParseComment(ctxt, /* bogus */ 0); + } else { + SKIP(2); + htmlParseComment(ctxt, /* bogus */ 1); + } + } else if (NXT(1) == '?') { + SKIP(1); + htmlParseComment(ctxt, /* bogus */ 1); + } else if (IS_ASCII_LETTER(NXT(1))) { + htmlParseElementInternal(ctxt); + } else { + htmlCheckParagraph(ctxt); + if ((ctxt->sax != NULL) && (!ctxt->disableSAX) && + (ctxt->sax->characters != NULL)) + ctxt->sax->characters(ctxt->userData, BAD_CAST "<", 1); + SKIP(1); + } + } else { + htmlParseCharData(ctxt); + } + + SHRINK; + GROW; + } + + if (ctxt->input->cur >= ctxt->input->end) + htmlAutoCloseOnEnd(ctxt); +} + +/** + * htmlParseElementInternal: + * @ctxt: an HTML parser context + * + * parse an HTML element, new version, non recursive + * + * [39] element ::= EmptyElemTag | STag content ETag + * + * [41] Attribute ::= Name Eq AttValue + */ + +static int +htmlParseElementInternal(htmlParserCtxtPtr ctxt) { + const xmlChar *name; + const htmlElemDesc * info; + htmlParserNodeInfo node_info = { NULL, 0, 0, 0, 0 }; + + if ((ctxt == NULL) || (ctxt->input == NULL)) + return(0); + + /* Capture start position */ + if (ctxt->record_info) { + node_info.begin_pos = ctxt->input->consumed + + (CUR_PTR - ctxt->input->base); + node_info.begin_line = ctxt->input->line; + } + + htmlParseStartTag(ctxt); + name = ctxt->name; + if (name == NULL) + return(0); + + if (ctxt->record_info) + htmlNodeInfoPush(ctxt, &node_info); + + /* + * Check for an Empty Element labeled the XML/SGML way + */ + if ((CUR == '/') && (NXT(1) == '>')) { + SKIP(2); + htmlParserFinishElementParsing(ctxt); + if ((ctxt->options & HTML_PARSE_HTML5) == 0) { + if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL)) + ctxt->sax->endElement(ctxt->userData, name); + } + htmlnamePop(ctxt); + return(0); + } + + if (CUR != '>') + return(0); + SKIP(1); + + /* + * Lookup the info for that element. + */ + info = htmlTagLookup(name); + + /* + * Check for an Empty Element from DTD definition + */ + if ((info != NULL) && (info->empty)) { + htmlParserFinishElementParsing(ctxt); + if ((ctxt->options & HTML_PARSE_HTML5) == 0) { + if ((ctxt->sax != NULL) && (ctxt->sax->endElement != NULL)) + ctxt->sax->endElement(ctxt->userData, name); + } + htmlnamePop(ctxt); + return(0); + } + + if (info != NULL) + ctxt->endCheckState = info->dataMode; + + return(1); +} + +/** + * htmlParseElement: + * @ctxt: an HTML parser context + * + * DEPRECATED: Internal function, don't use. + * + * parse an HTML element, this is highly recursive + * this is kept for compatibility with previous code versions + * + * [39] element ::= EmptyElemTag | STag content ETag + * + * [41] Attribute ::= Name Eq AttValue + */ + +void +htmlParseElement(htmlParserCtxtPtr ctxt) { + const xmlChar *oldptr; + int depth; + + if ((ctxt == NULL) || (ctxt->input == NULL)) + return; + + if (htmlParseElementInternal(ctxt) == 0) + return; + + /* + * Parse the content of the element: + */ + depth = ctxt->nameNr; + while (CUR != 0) { + oldptr = ctxt->input->cur; + htmlParseContent(ctxt); + if (oldptr==ctxt->input->cur) break; + if (ctxt->nameNr < depth) break; + } + + if (CUR == 0) { + htmlAutoCloseOnEnd(ctxt); + } +} + +/** + * htmlCtxtParseContentInternal: + * @ctxt: parser context + * @input: parser input + * + * Returns a node list. + */ +xmlNodePtr +htmlCtxtParseContentInternal(htmlParserCtxtPtr ctxt, xmlParserInputPtr input) { + xmlNodePtr root; + xmlNodePtr list = NULL; + xmlChar *rootName = BAD_CAST "#root"; + + root = xmlNewDocNode(ctxt->myDoc, NULL, rootName, NULL); + if (root == NULL) { + htmlErrMemory(ctxt); + return(NULL); + } + + if (xmlCtxtPushInput(ctxt, input) < 0) { + xmlFreeNode(root); + return(NULL); + } + + htmlnamePush(ctxt, rootName); + nodePush(ctxt, root); + + htmlParseContent(ctxt); + + /* TODO: Use xmlCtxtIsCatastrophicError */ + if (ctxt->errNo != XML_ERR_NO_MEMORY) { + xmlNodePtr cur; + + /* + * Unlink newly created node list. + */ + list = root->children; + root->children = NULL; + root->last = NULL; + for (cur = list; cur != NULL; cur = cur->next) + cur->parent = NULL; + } + + nodePop(ctxt); + htmlnamePop(ctxt); + + xmlCtxtPopInput(ctxt); + + xmlFreeNode(root); + return(list); +} + +/** + * htmlParseDocument: + * @ctxt: an HTML parser context + * + * Parse an HTML document and invoke the SAX handlers. This is useful + * if you're only interested in custom SAX callbacks. If you want a + * document tree, use htmlCtxtParseDocument. + * + * Returns 0, -1 in case of error. + */ + +int +htmlParseDocument(htmlParserCtxtPtr ctxt) { + xmlDtdPtr dtd; + + if ((ctxt == NULL) || (ctxt->input == NULL)) + return(-1); + + if ((ctxt->sax) && (ctxt->sax->setDocumentLocator)) { + ctxt->sax->setDocumentLocator(ctxt->userData, + (xmlSAXLocator *) &xmlDefaultSAXLocator); + } + + xmlDetectEncoding(ctxt); + + /* + * This is wrong but matches long-standing behavior. In most cases, + * a document starting with an XML declaration will specify UTF-8. + */ + if (((ctxt->input->flags & XML_INPUT_HAS_ENCODING) == 0) && + (xmlStrncmp(ctxt->input->cur, BAD_CAST "sax) && (ctxt->sax->startDocument) && (!ctxt->disableSAX)) + ctxt->sax->startDocument(ctxt->userData); + + /* + * Parse possible comments and PIs before any content + */ + while (CUR == '<') { + if ((NXT(1) == '!') && (NXT(2) == '-') && (NXT(3) == '-')) { + SKIP(4); + htmlParseComment(ctxt, /* bogus */ 0); + } else if (NXT(1) == '?') { + SKIP(1); + htmlParseComment(ctxt, /* bogus */ 1); + } else { + break; + } + SKIP_BLANKS; + } + + /* + * Then possibly doc type declaration(s) and more Misc + * (doctypedecl Misc*)? + */ + if ((CUR == '<') && (NXT(1) == '!') && + (UPP(2) == 'D') && (UPP(3) == 'O') && + (UPP(4) == 'C') && (UPP(5) == 'T') && + (UPP(6) == 'Y') && (UPP(7) == 'P') && + (UPP(8) == 'E')) { + ctxt->instate = XML_PARSER_MISC; + htmlParseDocTypeDecl(ctxt); + } + SKIP_BLANKS; + + /* + * Parse possible comments and PIs before any content + */ + ctxt->instate = XML_PARSER_PROLOG; + while (CUR == '<') { + if ((NXT(1) == '!') && (NXT(2) == '-') && (NXT(3) == '-')) { + SKIP(4); + htmlParseComment(ctxt, /* bogus */ 0); + } else if (NXT(1) == '?') { + SKIP(1); + htmlParseComment(ctxt, /* bogus */ 1); + } else { + break; + } + SKIP_BLANKS; + } + + /* + * Time to start parsing the tree itself + */ + ctxt->instate = XML_PARSER_CONTENT; + htmlParseContent(ctxt); + + /* + * autoclose + */ + if (CUR == 0) + htmlAutoCloseOnEnd(ctxt); + + + /* + * SAX: end of the document processing. + */ + if ((ctxt->sax) && (ctxt->sax->endDocument != NULL)) + ctxt->sax->endDocument(ctxt->userData); + + if ((!(ctxt->options & HTML_PARSE_NODEFDTD)) && (ctxt->myDoc != NULL)) { + dtd = xmlGetIntSubset(ctxt->myDoc); + if (dtd == NULL) { + ctxt->myDoc->intSubset = + xmlCreateIntSubset(ctxt->myDoc, BAD_CAST "html", + BAD_CAST "-//W3C//DTD HTML 4.0 Transitional//EN", + BAD_CAST "http://www.w3.org/TR/REC-html40/loose.dtd"); + if (ctxt->myDoc->intSubset == NULL) + htmlErrMemory(ctxt); + } + } + if (! ctxt->wellFormed) return(-1); + return(0); +} + + +/************************************************************************ + * * + * Parser contexts handling * + * * + ************************************************************************/ + +/** + * htmlInitParserCtxt: + * @ctxt: an HTML parser context + * @sax: SAX handler + * @userData: user data + * + * Initialize a parser context + * + * Returns 0 in case of success and -1 in case of error + */ + +static int +htmlInitParserCtxt(htmlParserCtxtPtr ctxt, const htmlSAXHandler *sax, + void *userData) +{ + if (ctxt == NULL) return(-1); + memset(ctxt, 0, sizeof(htmlParserCtxt)); + + ctxt->dict = xmlDictCreate(); + if (ctxt->dict == NULL) + return(-1); + + if (ctxt->sax == NULL) + ctxt->sax = (htmlSAXHandler *) xmlMalloc(sizeof(htmlSAXHandler)); + if (ctxt->sax == NULL) + return(-1); + if (sax == NULL) { + memset(ctxt->sax, 0, sizeof(htmlSAXHandler)); + xmlSAX2InitHtmlDefaultSAXHandler(ctxt->sax); + ctxt->userData = ctxt; + } else { + memcpy(ctxt->sax, sax, sizeof(htmlSAXHandler)); + ctxt->userData = userData ? userData : ctxt; + } + + /* Allocate the Input stack */ + ctxt->inputTab = (htmlParserInputPtr *) + xmlMalloc(5 * sizeof(htmlParserInputPtr)); + if (ctxt->inputTab == NULL) + return(-1); + ctxt->inputNr = 0; + ctxt->inputMax = 5; + ctxt->input = NULL; + ctxt->version = NULL; + ctxt->encoding = NULL; + ctxt->standalone = -1; + ctxt->instate = XML_PARSER_START; + + /* Allocate the Node stack */ + ctxt->nodeTab = (htmlNodePtr *) xmlMalloc(10 * sizeof(htmlNodePtr)); + if (ctxt->nodeTab == NULL) + return(-1); + ctxt->nodeNr = 0; + ctxt->nodeMax = 10; + ctxt->node = NULL; + + /* Allocate the Name stack */ + ctxt->nameTab = (const xmlChar **) xmlMalloc(10 * sizeof(xmlChar *)); + if (ctxt->nameTab == NULL) + return(-1); + ctxt->nameNr = 0; + ctxt->nameMax = 10; + ctxt->name = NULL; + + ctxt->nodeInfoTab = NULL; + ctxt->nodeInfoNr = 0; + ctxt->nodeInfoMax = 0; + + ctxt->myDoc = NULL; + ctxt->wellFormed = 1; + ctxt->replaceEntities = 0; + ctxt->linenumbers = xmlLineNumbersDefaultValue; + ctxt->keepBlanks = xmlKeepBlanksDefaultValue; + ctxt->html = 1; + ctxt->vctxt.flags = XML_VCTXT_USE_PCTXT; + ctxt->vctxt.userData = ctxt; + ctxt->vctxt.error = xmlParserValidityError; + ctxt->vctxt.warning = xmlParserValidityWarning; + ctxt->record_info = 0; + ctxt->validate = 0; + ctxt->checkIndex = 0; + ctxt->catalogs = NULL; + xmlInitNodeInfoSeq(&ctxt->node_seq); + return(0); +} + +/** + * htmlFreeParserCtxt: + * @ctxt: an HTML parser context + * + * Free all the memory used by a parser context. However the parsed + * document in ctxt->myDoc is not freed. + */ + +void +htmlFreeParserCtxt(htmlParserCtxtPtr ctxt) +{ + xmlFreeParserCtxt(ctxt); +} + +/** + * htmlNewParserCtxt: + * + * Allocate and initialize a new HTML parser context. + * + * This can be used to parse HTML documents into DOM trees with + * functions like xmlCtxtReadFile or xmlCtxtReadMemory. + * + * See htmlCtxtUseOptions for parser options. + * + * See xmlCtxtSetErrorHandler for advanced error handling. + * + * See htmlNewSAXParserCtxt for custom SAX parsers. + * + * Returns the htmlParserCtxtPtr or NULL in case of allocation error + */ + +htmlParserCtxtPtr +htmlNewParserCtxt(void) +{ + return(htmlNewSAXParserCtxt(NULL, NULL)); +} + +/** + * htmlNewSAXParserCtxt: + * @sax: SAX handler + * @userData: user data + * + * Allocate and initialize a new HTML SAX parser context. If userData + * is NULL, the parser context will be passed as user data. + * + * Available since 2.11.0. If you want support older versions, + * it's best to invoke htmlNewParserCtxt and set ctxt->sax with + * struct assignment. + * + * Also see htmlNewParserCtxt. + * + * Returns the htmlParserCtxtPtr or NULL in case of allocation error + */ + +htmlParserCtxtPtr +htmlNewSAXParserCtxt(const htmlSAXHandler *sax, void *userData) +{ + xmlParserCtxtPtr ctxt; + + xmlInitParser(); + + ctxt = (xmlParserCtxtPtr) xmlMalloc(sizeof(xmlParserCtxt)); + if (ctxt == NULL) + return(NULL); + memset(ctxt, 0, sizeof(xmlParserCtxt)); + if (htmlInitParserCtxt(ctxt, sax, userData) < 0) { + htmlFreeParserCtxt(ctxt); + return(NULL); + } + return(ctxt); +} + +static htmlParserCtxtPtr +htmlCreateMemoryParserCtxtInternal(const char *url, + const char *buffer, size_t size, + const char *encoding) { + xmlParserCtxtPtr ctxt; + xmlParserInputPtr input; + + if (buffer == NULL) + return(NULL); + + ctxt = htmlNewParserCtxt(); + if (ctxt == NULL) + return(NULL); + + input = xmlCtxtNewInputFromMemory(ctxt, url, buffer, size, encoding, 0); + if (input == NULL) { + xmlFreeParserCtxt(ctxt); + return(NULL); + } + + if (xmlCtxtPushInput(ctxt, input) < 0) { + xmlFreeInputStream(input); + xmlFreeParserCtxt(ctxt); + return(NULL); + } + + return(ctxt); +} + +/** + * htmlCreateMemoryParserCtxt: + * @buffer: a pointer to a char array + * @size: the size of the array + * + * DEPRECATED: Use htmlNewParserCtxt and htmlCtxtReadMemory. + * + * Create a parser context for an HTML in-memory document. The input + * buffer must not contain any terminating null bytes. + * + * Returns the new parser context or NULL + */ +htmlParserCtxtPtr +htmlCreateMemoryParserCtxt(const char *buffer, int size) { + if (size <= 0) + return(NULL); + + return(htmlCreateMemoryParserCtxtInternal(NULL, buffer, size, NULL)); +} + +/** + * htmlCreateDocParserCtxt: + * @str: a pointer to an array of xmlChar + * @encoding: encoding (optional) + * + * Create a parser context for a null-terminated string. + * + * Returns the new parser context or NULL if a memory allocation failed. + */ +static htmlParserCtxtPtr +htmlCreateDocParserCtxt(const xmlChar *str, const char *url, + const char *encoding) { + xmlParserCtxtPtr ctxt; + xmlParserInputPtr input; + + if (str == NULL) + return(NULL); + + ctxt = htmlNewParserCtxt(); + if (ctxt == NULL) + return(NULL); + + input = xmlCtxtNewInputFromString(ctxt, url, (const char *) str, + encoding, 0); + if (input == NULL) { + xmlFreeParserCtxt(ctxt); + return(NULL); + } + + if (xmlCtxtPushInput(ctxt, input) < 0) { + xmlFreeInputStream(input); + xmlFreeParserCtxt(ctxt); + return(NULL); + } + + return(ctxt); +} + +#ifdef LIBXML_PUSH_ENABLED +/************************************************************************ + * * + * Progressive parsing interfaces * + * * + ************************************************************************/ + +typedef enum { + LSTATE_TAG_NAME = 0, + LSTATE_BEFORE_ATTR_NAME, + LSTATE_ATTR_NAME, + LSTATE_AFTER_ATTR_NAME, + LSTATE_BEFORE_ATTR_VALUE, + LSTATE_ATTR_VALUE_DQUOTED, + LSTATE_ATTR_VALUE_SQUOTED, + LSTATE_ATTR_VALUE_UNQUOTED +} xmlLookupStates; + +/** + * htmlParseLookupGt: + * @ctxt: an HTML parser context + * + * Check whether there's enough data in the input buffer to finish parsing + * a tag. This has to take quotes into account. + */ +static int +htmlParseLookupGt(xmlParserCtxtPtr ctxt) { + const xmlChar *cur; + const xmlChar *end = ctxt->input->end; + int state = ctxt->endCheckState; + size_t index; + + if (ctxt->checkIndex == 0) + cur = ctxt->input->cur + 2; /* Skip 'input->cur + ctxt->checkIndex; + + while (cur < end) { + int c = *cur++; + + if (state != LSTATE_ATTR_VALUE_SQUOTED && + state != LSTATE_ATTR_VALUE_DQUOTED) { + if (c == '/' && + state != LSTATE_BEFORE_ATTR_VALUE && + state != LSTATE_ATTR_VALUE_UNQUOTED) { + state = LSTATE_BEFORE_ATTR_NAME; + continue; + } else if (c == '>') { + ctxt->checkIndex = 0; + ctxt->endCheckState = 0; + return(0); + } + } + + switch (state) { + case LSTATE_TAG_NAME: + if (IS_WS_HTML(c)) + state = LSTATE_BEFORE_ATTR_NAME; + break; + + case LSTATE_BEFORE_ATTR_NAME: + if (!IS_WS_HTML(c)) + state = LSTATE_ATTR_NAME; + break; + + case LSTATE_ATTR_NAME: + if (c == '=') + state = LSTATE_BEFORE_ATTR_VALUE; + else if (IS_WS_HTML(c)) + state = LSTATE_AFTER_ATTR_NAME; + break; + + case LSTATE_AFTER_ATTR_NAME: + if (c == '=') + state = LSTATE_BEFORE_ATTR_VALUE; + else if (!IS_WS_HTML(c)) + state = LSTATE_ATTR_NAME; + break; + + case LSTATE_BEFORE_ATTR_VALUE: + if (c == '"') + state = LSTATE_ATTR_VALUE_DQUOTED; + else if (c == '\'') + state = LSTATE_ATTR_VALUE_SQUOTED; + else if (!IS_WS_HTML(c)) + state = LSTATE_ATTR_VALUE_UNQUOTED; + break; + + case LSTATE_ATTR_VALUE_DQUOTED: + if (c == '"') + state = LSTATE_BEFORE_ATTR_NAME; + break; + + case LSTATE_ATTR_VALUE_SQUOTED: + if (c == '\'') + state = LSTATE_BEFORE_ATTR_NAME; + break; + + case LSTATE_ATTR_VALUE_UNQUOTED: + if (IS_WS_HTML(c)) + state = LSTATE_BEFORE_ATTR_NAME; + break; + } + } + + index = cur - ctxt->input->cur; + if (index > LONG_MAX) { + ctxt->checkIndex = 0; + ctxt->endCheckState = 0; + return(0); + } + ctxt->checkIndex = index; + ctxt->endCheckState = state; + return(-1); +} + +/** + * htmlParseLookupString: + * @ctxt: an XML parser context + * @startDelta: delta to apply at the start + * @str: string + * @strLen: length of string + * + * Check whether the input buffer contains a string. + */ +static int +htmlParseLookupString(xmlParserCtxtPtr ctxt, size_t startDelta, + const char *str, size_t strLen, size_t extraLen) { + const xmlChar *end = ctxt->input->end; + const xmlChar *cur, *term; + size_t index, rescan; + int ret; + + if (ctxt->checkIndex == 0) { + cur = ctxt->input->cur + startDelta; + } else { + cur = ctxt->input->cur + ctxt->checkIndex; + } + + term = BAD_CAST strstr((const char *) cur, str); + if ((term != NULL) && + ((size_t) (ctxt->input->end - term) >= extraLen + 1)) { + ctxt->checkIndex = 0; + + if (term - ctxt->input->cur > INT_MAX / 2) + ret = INT_MAX / 2; + else + ret = term - ctxt->input->cur; + + return(ret); + } + + /* Rescan (strLen + extraLen - 1) characters. */ + rescan = strLen + extraLen - 1; + if ((size_t) (end - cur) <= rescan) + end = cur; + else + end -= rescan; + index = end - ctxt->input->cur; + if (index > INT_MAX / 2) { + ctxt->checkIndex = 0; + ret = INT_MAX / 2; + } else { + ctxt->checkIndex = index; + ret = -1; + } + + return(ret); +} + +/** + * htmlParseLookupCommentEnd: + * @ctxt: an HTML parser context + * + * Try to find a comment end tag in the input stream + * The search includes "-->" as well as WHATWG-recommended incorrectly-closed tags. + * (See https://html.spec.whatwg.org/multipage/parsing.html#parse-error-incorrectly-closed-comment) + * This function has a side effect of (possibly) incrementing ctxt->checkIndex + * to avoid rescanning sequences of bytes, it DOES change the state of the + * parser, do not use liberally. + * + * Returns the index to the current parsing point if the full sequence is available, -1 otherwise. + */ +static int +htmlParseLookupCommentEnd(htmlParserCtxtPtr ctxt) +{ + int mark = 0; + int offset; + + while (1) { + mark = htmlParseLookupString(ctxt, 2, "--", 2, 0); + if (mark < 0) + break; + if ((NXT(mark+2) == '>') || + ((NXT(mark+2) == '!') && (NXT(mark+3) == '>'))) { + ctxt->checkIndex = 0; + break; + } + offset = (NXT(mark+2) == '!') ? 3 : 2; + if (mark + offset >= ctxt->input->end - ctxt->input->cur) { + ctxt->checkIndex = mark; + return(-1); + } + ctxt->checkIndex = mark + 1; + } + return mark; +} + + +/** + * htmlParseTryOrFinish: + * @ctxt: an HTML parser context + * @terminate: last chunk indicator + * + * Try to progress on parsing + * + * Returns zero if no parsing was possible + */ +static int +htmlParseTryOrFinish(htmlParserCtxtPtr ctxt, int terminate) { + int ret = 0; + htmlParserInputPtr in; + ptrdiff_t avail = 0; + int cur; + + htmlParserNodeInfo node_info; + + while (PARSER_STOPPED(ctxt) == 0) { + + in = ctxt->input; + if (in == NULL) break; + avail = in->end - in->cur; + 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]; + + switch (ctxt->instate) { + case XML_PARSER_EOF: + /* + * Document parsing is done ! + */ + goto done; + case XML_PARSER_START: + /* + * This is wrong but matches long-standing behavior. In most + * cases, a document starting with an XML declaration will + * specify UTF-8. + */ + if (((ctxt->input->flags & XML_INPUT_HAS_ENCODING) == 0) && + (xmlStrncmp(ctxt->input->cur, BAD_CAST "sax) && (ctxt->sax->setDocumentLocator)) { + ctxt->sax->setDocumentLocator(ctxt->userData, + (xmlSAXLocator *) &xmlDefaultSAXLocator); + } + if ((ctxt->sax) && (ctxt->sax->startDocument) && + (!ctxt->disableSAX)) + ctxt->sax->startDocument(ctxt->userData); + + /* Allow callback to modify state */ + if (ctxt->instate == XML_PARSER_START) + ctxt->instate = XML_PARSER_MISC; + break; + case XML_PARSER_START_TAG: { + const xmlChar *name; + int next; + const htmlElemDesc * info; + + /* + * not enough chars in buffer + */ + if (avail < 2) + goto done; + cur = in->cur[0]; + next = in->cur[1]; + if (cur != '<') { + ctxt->instate = XML_PARSER_CONTENT; + break; + } + if (next == '/') { + ctxt->instate = XML_PARSER_END_TAG; + ctxt->checkIndex = 0; + break; + } + if ((!terminate) && + (htmlParseLookupGt(ctxt) < 0)) + goto done; + + /* Capture start position */ + if (ctxt->record_info) { + node_info.begin_pos = ctxt->input->consumed + + (CUR_PTR - ctxt->input->base); + node_info.begin_line = ctxt->input->line; + } + + + htmlParseStartTag(ctxt); + name = ctxt->name; + if (name == NULL) + break; + + /* + * Check for an Empty Element labeled the XML/SGML way + */ + if ((CUR == '/') && (NXT(1) == '>')) { + SKIP(2); + htmlParserFinishElementParsing(ctxt); + if ((ctxt->options & HTML_PARSE_HTML5) == 0) { + if ((ctxt->sax != NULL) && + (ctxt->sax->endElement != NULL)) + ctxt->sax->endElement(ctxt->userData, name); + } + htmlnamePop(ctxt); + ctxt->instate = XML_PARSER_CONTENT; + break; + } + + if (CUR != '>') + break; + SKIP(1); + + /* + * Lookup the info for that element. + */ + info = htmlTagLookup(name); + + /* + * Check for an Empty Element from DTD definition + */ + if ((info != NULL) && (info->empty)) { + htmlParserFinishElementParsing(ctxt); + if ((ctxt->options & HTML_PARSE_HTML5) == 0) { + if ((ctxt->sax != NULL) && + (ctxt->sax->endElement != NULL)) + ctxt->sax->endElement(ctxt->userData, name); + } + htmlnamePop(ctxt); + } + + if (info != NULL) + ctxt->endCheckState = info->dataMode; + + if (ctxt->record_info) + htmlNodeInfoPush(ctxt, &node_info); + + ctxt->instate = XML_PARSER_CONTENT; + break; + } + case XML_PARSER_MISC: + case XML_PARSER_PROLOG: + case XML_PARSER_CONTENT: + case XML_PARSER_EPILOG: { + int mode; + + if ((ctxt->instate == XML_PARSER_MISC) || + (ctxt->instate == XML_PARSER_PROLOG)) { + SKIP_BLANKS; + avail = in->end - in->cur; + } + + if (avail < 1) + goto done; + cur = in->cur[0]; + mode = ctxt->endCheckState; + + if (mode != 0) { + while ((PARSER_STOPPED(ctxt) == 0) && + (in->cur < in->end)) { + size_t extra; + + extra = strlen((const char *) ctxt->name) + 2; + + if ((!terminate) && + (htmlParseLookupString(ctxt, 0, "<", 1, + extra) < 0)) + goto done; + ctxt->checkIndex = 0; + + if (htmlParseCharData(ctxt)) + break; + } + + break; + } else if (cur == '<') { + int next; + + if (avail < 2) { + if (!terminate) + goto done; + next = ' '; + } else { + next = in->cur[1]; + } + + if (next == '!') { + if ((!terminate) && (avail < 4)) + goto done; + if ((in->cur[2] == '-') && (in->cur[3] == '-')) { + if ((!terminate) && + (htmlParseLookupCommentEnd(ctxt) < 0)) + goto done; + SKIP(4); + htmlParseComment(ctxt, /* bogus */ 0); + break; + } + + if ((!terminate) && (avail < 9)) + goto done; + if ((UPP(2) == 'D') && (UPP(3) == 'O') && + (UPP(4) == 'C') && (UPP(5) == 'T') && + (UPP(6) == 'Y') && (UPP(7) == 'P') && + (UPP(8) == 'E')) { + if ((!terminate) && + (htmlParseLookupString(ctxt, 9, ">", 1, + 0) < 0)) + goto done; + htmlParseDocTypeDecl(ctxt); + if (ctxt->instate == XML_PARSER_MISC) + ctxt->instate = XML_PARSER_PROLOG; + } else { + if ((!terminate) && + (htmlParseLookupString(ctxt, 2, ">", 1, 0) < 0)) + goto done; + SKIP(2); + htmlParseComment(ctxt, /* bogus */ 1); + } + } else if (next == '?') { + if ((!terminate) && + (htmlParseLookupString(ctxt, 2, ">", 1, 0) < 0)) + goto done; + SKIP(1); + htmlParseComment(ctxt, /* bogus */ 1); + } else if (next == '/') { + ctxt->instate = XML_PARSER_END_TAG; + ctxt->checkIndex = 0; + break; + } else if (IS_ASCII_LETTER(next)) { + if ((!terminate) && (next == 0)) + goto done; + ctxt->instate = XML_PARSER_START_TAG; + ctxt->checkIndex = 0; + break; + } else { + ctxt->instate = XML_PARSER_CONTENT; + htmlCheckParagraph(ctxt); + if ((ctxt->sax != NULL) && (!ctxt->disableSAX) && + (ctxt->sax->characters != NULL)) + ctxt->sax->characters(ctxt->userData, + BAD_CAST "<", 1); + SKIP(1); + } + } else { + /* + * 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) && + (htmlParseLookupString(ctxt, 0, "<", 1, 0) < 0)) + goto done; + ctxt->checkIndex = 0; + htmlParseCharData(ctxt); + } + + break; + } + case XML_PARSER_END_TAG: + if ((terminate) && (avail == 2)) { + htmlCheckParagraph(ctxt); + if ((ctxt->sax != NULL) && (!ctxt->disableSAX) && + (ctxt->sax->characters != NULL)) + ctxt->sax->characters(ctxt->userData, + BAD_CAST "nameNr == 0) { + ctxt->instate = XML_PARSER_EPILOG; + } else { + ctxt->instate = XML_PARSER_CONTENT; + } + ctxt->checkIndex = 0; + break; + default: + htmlParseErr(ctxt, XML_ERR_INTERNAL_ERROR, + "HPP: internal error\n", NULL, NULL); + ctxt->instate = XML_PARSER_EOF; + break; + } + } +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->options & HTML_PARSE_NODEFDTD)) && (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"); + if (ctxt->myDoc->intSubset == NULL) + htmlErrMemory(ctxt); + } + } + return(ret); +} + +/** + * htmlParseChunk: + * @ctxt: an HTML parser context + * @chunk: chunk of memory + * @size: size of chunk in bytes + * @terminate: last chunk indicator + * + * Parse a chunk of memory in push parser mode. + * + * Assumes that the parser context was initialized with + * htmlCreatePushParserCtxt. + * + * The last chunk, which will often be empty, must be marked with + * the @terminate flag. With the default SAX callbacks, the resulting + * document will be available in ctxt->myDoc. This pointer will not + * be freed by the library. + * + * If the document isn't well-formed, ctxt->myDoc is set to NULL. + * + * Returns an xmlParserErrors code (0 on success). + */ +int +htmlParseChunk(htmlParserCtxtPtr ctxt, const char *chunk, int size, + int terminate) { + if ((ctxt == NULL) || (ctxt->input == NULL)) + return(XML_ERR_ARGUMENT); + if (PARSER_STOPPED(ctxt) != 0) + return(ctxt->errNo); + if ((size > 0) && (chunk != NULL) && (ctxt->input != NULL) && + (ctxt->input->buf != NULL)) { + size_t pos = ctxt->input->cur - ctxt->input->base; + int res; + + res = xmlParserInputBufferPush(ctxt->input->buf, size, chunk); + xmlBufUpdateInput(ctxt->input->buf->buffer, ctxt->input, pos); + if (res < 0) { + htmlParseErr(ctxt, ctxt->input->buf->error, + "xmlParserInputBufferPush failed", NULL, NULL); + xmlHaltParser(ctxt); + return (ctxt->errNo); + } + } + htmlParseTryOrFinish(ctxt, terminate); + if (terminate) { + 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 (optional) + * @user_data: The user data returned on SAX callbacks (optional) + * @chunk: a pointer to an array of chars (optional) + * @size: number of chars in the array + * @filename: only used for error reporting (optional) + * @enc: encoding (deprecated, pass XML_CHAR_ENCODING_NONE) + * + * Create a parser context for using the HTML parser in push mode. + * + * Returns the new parser context or NULL if a memory allocation + * failed. + */ +htmlParserCtxtPtr +htmlCreatePushParserCtxt(htmlSAXHandlerPtr sax, void *user_data, + const char *chunk, int size, const char *filename, + xmlCharEncoding enc) { + htmlParserCtxtPtr ctxt; + htmlParserInputPtr input; + const char *encoding; + + ctxt = htmlNewSAXParserCtxt(sax, user_data); + if (ctxt == NULL) + return(NULL); + + encoding = xmlGetCharEncodingName(enc); + input = xmlNewPushInput(filename, chunk, size); + if (input == NULL) { + htmlFreeParserCtxt(ctxt); + return(NULL); + } + + if (xmlCtxtPushInput(ctxt, input) < 0) { + xmlFreeInputStream(input); + xmlFreeParserCtxt(ctxt); + return(NULL); + } + + if (encoding != NULL) + xmlSwitchEncodingName(ctxt, encoding); + + return(ctxt); +} +#endif /* LIBXML_PUSH_ENABLED */ + +/** + * htmlSAXParseDoc: + * @cur: a pointer to an array of xmlChar + * @encoding: a free form C string describing the HTML document encoding, or NULL + * @sax: the SAX handler block + * @userData: if using SAX, this pointer will be provided on callbacks. + * + * DEPRECATED: Use htmlNewSAXParserCtxt and htmlCtxtReadDoc. + * + * Parse an HTML in-memory document. If sax is not NULL, use the SAX callbacks + * to handle parse events. If sax is NULL, fallback to the default DOM + * behavior and return a tree. + * + * Returns the resulting document tree unless SAX is NULL or the document is + * not well formed. + */ + +htmlDocPtr +htmlSAXParseDoc(const xmlChar *cur, const char *encoding, + htmlSAXHandlerPtr sax, void *userData) { + htmlDocPtr ret; + htmlParserCtxtPtr ctxt; + + if (cur == NULL) + return(NULL); + + ctxt = htmlCreateDocParserCtxt(cur, NULL, encoding); + if (ctxt == NULL) + return(NULL); + + if (sax != NULL) { + *ctxt->sax = *sax; + ctxt->userData = userData; + } + + htmlParseDocument(ctxt); + ret = ctxt->myDoc; + htmlFreeParserCtxt(ctxt); + + return(ret); +} + +/** + * htmlParseDoc: + * @cur: a pointer to an array of xmlChar + * @encoding: the encoding (optional) + * + * DEPRECATED: Use htmlReadDoc. + * + * Parse an HTML in-memory document and build a tree. + * + * This function uses deprecated global parser options. + * + * Returns the resulting document tree + */ + +htmlDocPtr +htmlParseDoc(const xmlChar *cur, const char *encoding) { + return(htmlSAXParseDoc(cur, encoding, NULL, NULL)); +} + + +/** + * htmlCreateFileParserCtxt: + * @filename: the filename + * @encoding: optional encoding + * + * DEPRECATED: Use htmlNewParserCtxt and htmlCtxtReadFile. + * + * Create a parser context to read from a file. + * + * A non-NULL encoding overrides encoding declarations in the document. + * + * Automatic support for ZLIB/Compress compressed document is provided + * by default if found at compile-time. + * + * Returns the new parser context or NULL if a memory allocation failed. + */ +htmlParserCtxtPtr +htmlCreateFileParserCtxt(const char *filename, const char *encoding) +{ + htmlParserCtxtPtr ctxt; + htmlParserInputPtr input; + + if (filename == NULL) + return(NULL); + + ctxt = htmlNewParserCtxt(); + if (ctxt == NULL) { + return(NULL); + } + + input = xmlCtxtNewInputFromUrl(ctxt, filename, NULL, encoding, 0); + if (input == NULL) { + xmlFreeParserCtxt(ctxt); + return(NULL); + } + if (xmlCtxtPushInput(ctxt, input) < 0) { + xmlFreeInputStream(input); + xmlFreeParserCtxt(ctxt); + return(NULL); + } + + return(ctxt); +} + +/** + * htmlSAXParseFile: + * @filename: the filename + * @encoding: encoding (optional) + * @sax: the SAX handler block + * @userData: if using SAX, this pointer will be provided on callbacks. + * + * DEPRECATED: Use htmlNewSAXParserCtxt and htmlCtxtReadFile. + * + * parse an HTML file and build a tree. Automatic support for ZLIB/Compress + * compressed document is provided by default if found at compile-time. + * It use the given SAX function block to handle the parsing callback. + * If sax is NULL, fallback to the default DOM tree building routines. + * + * Returns the resulting document tree unless SAX is NULL or the document is + * not well formed. + */ + +htmlDocPtr +htmlSAXParseFile(const char *filename, const char *encoding, htmlSAXHandlerPtr sax, + void *userData) { + htmlDocPtr ret; + htmlParserCtxtPtr ctxt; + htmlSAXHandlerPtr oldsax = NULL; + + ctxt = htmlCreateFileParserCtxt(filename, encoding); + if (ctxt == NULL) return(NULL); + if (sax != NULL) { + oldsax = ctxt->sax; + ctxt->sax = sax; + ctxt->userData = userData; + } + + htmlParseDocument(ctxt); + + ret = ctxt->myDoc; + if (sax != NULL) { + ctxt->sax = oldsax; + ctxt->userData = NULL; + } + htmlFreeParserCtxt(ctxt); + + return(ret); +} + +/** + * htmlParseFile: + * @filename: the filename + * @encoding: encoding (optional) + * + * Parse an HTML file and build a tree. + * + * Returns the resulting document tree + */ + +htmlDocPtr +htmlParseFile(const char *filename, const char *encoding) { + return(htmlSAXParseFile(filename, encoding, NULL, NULL)); +} + +/** + * htmlHandleOmittedElem: + * @val: int 0 or 1 + * + * DEPRECATED: Use HTML_PARSE_NOIMPLIED + * + * Set and return the previous value for handling HTML omitted tags. + * + * Returns the last value for 0 for no handling, 1 for auto insertion. + */ + +int +htmlHandleOmittedElem(int val) { + int old = htmlOmittedDefaultValue; + + htmlOmittedDefaultValue = val; + return(old); +} + +/** + * htmlElementAllowedHere: + * @parent: HTML parent element + * @elt: HTML element + * + * DEPRECATED: Don't use. + * + * Returns 1 + */ +int +htmlElementAllowedHere(const htmlElemDesc* parent ATTRIBUTE_UNUSED, + const xmlChar* elt ATTRIBUTE_UNUSED) { + return(1); +} + +/** + * htmlElementStatusHere: + * @parent: HTML parent element + * @elt: HTML element + * + * DEPRECATED: Don't use. + * + * Returns HTML_VALID + */ +htmlStatus +htmlElementStatusHere(const htmlElemDesc* parent ATTRIBUTE_UNUSED, + const htmlElemDesc* elt ATTRIBUTE_UNUSED) { + return(HTML_VALID); +} + +/** + * htmlAttrAllowed: + * @elt: HTML element + * @attr: HTML attribute + * @legacy: whether to allow deprecated attributes + * + * DEPRECATED: Don't use. + * + * Returns HTML_VALID + */ +htmlStatus +htmlAttrAllowed(const htmlElemDesc* elt ATTRIBUTE_UNUSED, + const xmlChar* attr ATTRIBUTE_UNUSED, + int legacy ATTRIBUTE_UNUSED) { + return(HTML_VALID); +} + +/** + * htmlNodeStatus: + * @node: an htmlNodePtr in a tree + * @legacy: whether to allow deprecated elements (YES is faster here + * for Element nodes) + * + * DEPRECATED: Don't use. + * + * Returns HTML_VALID + */ +htmlStatus +htmlNodeStatus(htmlNodePtr node ATTRIBUTE_UNUSED, + int legacy ATTRIBUTE_UNUSED) { + return(HTML_VALID); +} + +/************************************************************************ + * * + * New set (2.6.0) of simpler and more flexible APIs * + * * + ************************************************************************/ +/** + * DICT_FREE: + * @str: a string + * + * Free a string if it is not owned by the "dict" dictionary in the + * current scope + */ +#define DICT_FREE(str) \ + if ((str) && ((!dict) || \ + (xmlDictOwns(dict, (const xmlChar *)(str)) == 0))) \ + xmlFree((char *)(str)); + +/** + * htmlCtxtReset: + * @ctxt: an HTML parser context + * + * Reset a parser context + */ +void +htmlCtxtReset(htmlParserCtxtPtr ctxt) +{ + xmlParserInputPtr input; + xmlDictPtr dict; + + if (ctxt == NULL) + return; + + dict = ctxt->dict; + + while ((input = xmlCtxtPopInput(ctxt)) != NULL) { /* Non consuming */ + xmlFreeInputStream(input); + } + ctxt->inputNr = 0; + ctxt->input = NULL; + + ctxt->spaceNr = 0; + if (ctxt->spaceTab != NULL) { + ctxt->spaceTab[0] = -1; + ctxt->space = &ctxt->spaceTab[0]; + } else { + ctxt->space = NULL; + } + + + ctxt->nodeNr = 0; + ctxt->node = NULL; + + ctxt->nameNr = 0; + ctxt->name = NULL; + + ctxt->nsNr = 0; + + DICT_FREE(ctxt->version); + ctxt->version = NULL; + DICT_FREE(ctxt->encoding); + ctxt->encoding = NULL; + DICT_FREE(ctxt->extSubURI); + ctxt->extSubURI = NULL; + DICT_FREE(ctxt->extSubSystem); + ctxt->extSubSystem = NULL; + + if (ctxt->directory != NULL) { + xmlFree(ctxt->directory); + ctxt->directory = NULL; + } + + if (ctxt->myDoc != NULL) + xmlFreeDoc(ctxt->myDoc); + ctxt->myDoc = NULL; + + ctxt->standalone = -1; + ctxt->hasExternalSubset = 0; + ctxt->hasPErefs = 0; + ctxt->html = 1; + ctxt->instate = XML_PARSER_START; + + ctxt->wellFormed = 1; + ctxt->nsWellFormed = 1; + ctxt->disableSAX = 0; + ctxt->valid = 1; + ctxt->vctxt.userData = ctxt; + ctxt->vctxt.flags = XML_VCTXT_USE_PCTXT; + ctxt->vctxt.error = xmlParserValidityError; + ctxt->vctxt.warning = xmlParserValidityWarning; + ctxt->record_info = 0; + ctxt->checkIndex = 0; + ctxt->endCheckState = 0; + ctxt->inSubset = 0; + ctxt->errNo = XML_ERR_OK; + ctxt->depth = 0; + ctxt->catalogs = NULL; + xmlInitNodeInfoSeq(&ctxt->node_seq); + + if (ctxt->attsDefault != NULL) { + xmlHashFree(ctxt->attsDefault, xmlHashDefaultDeallocator); + ctxt->attsDefault = NULL; + } + if (ctxt->attsSpecial != NULL) { + xmlHashFree(ctxt->attsSpecial, NULL); + ctxt->attsSpecial = NULL; + } + + ctxt->nbErrors = 0; + ctxt->nbWarnings = 0; + if (ctxt->lastError.code != XML_ERR_OK) + xmlResetError(&ctxt->lastError); +} + +static int +htmlCtxtSetOptionsInternal(xmlParserCtxtPtr ctxt, int options, int keepMask) +{ + int allMask; + + if (ctxt == NULL) + return(-1); + + allMask = HTML_PARSE_RECOVER | + HTML_PARSE_HTML5 | + HTML_PARSE_NODEFDTD | + HTML_PARSE_NOERROR | + HTML_PARSE_NOWARNING | + HTML_PARSE_PEDANTIC | + HTML_PARSE_NOBLANKS | + HTML_PARSE_NONET | + HTML_PARSE_NOIMPLIED | + HTML_PARSE_COMPACT | + HTML_PARSE_HUGE | + HTML_PARSE_IGNORE_ENC | + HTML_PARSE_BIG_LINES; + + ctxt->options = (ctxt->options & keepMask) | (options & allMask); + + /* + * For some options, struct members are historically the source + * of truth. See xmlCtxtSetOptionsInternal. + */ + ctxt->keepBlanks = (options & HTML_PARSE_NOBLANKS) ? 0 : 1; + + /* + * Changing SAX callbacks is a bad idea. This should be fixed. + */ + if (options & HTML_PARSE_NOBLANKS) { + ctxt->sax->ignorableWhitespace = xmlSAX2IgnorableWhitespace; + } + if (options & HTML_PARSE_HUGE) { + if (ctxt->dict != NULL) + xmlDictSetLimit(ctxt->dict, 0); + } + + /* + * It would be useful to allow this feature. + */ + ctxt->dictNames = 0; + + ctxt->linenumbers = 1; + + return(options & ~allMask); +} + +/** + * htmlCtxtSetOptions: + * @ctxt: an HTML parser context + * @options: a bitmask of xmlParserOption values + * + * Applies the options to the parser context. Unset options are + * cleared. + * + * Available since 2.14.0. With older versions, you can use + * htmlCtxtUseOptions. + * + * HTML_PARSE_RECOVER + * + * No effect as of 2.14.0. + * + * HTML_PARSE_HTML5 + * + * Make the tokenizer emit a SAX callback for each token. This results + * in unbalanced invocations of startElement and endElement. + * + * For now, this is only usable with custom SAX callbacks. + * + * HTML_PARSE_NODEFDTD + * + * Do not default to a doctype if none was found. + * + * HTML_PARSE_NOERROR + * + * Disable error and warning reports to the error handlers. + * Errors are still accessible with xmlCtxtGetLastError. + * + * HTML_PARSE_NOWARNING + * + * Disable warning reports. + * + * HTML_PARSE_PEDANTIC + * + * No effect. + * + * HTML_PARSE_NOBLANKS + * + * Remove some text nodes containing only whitespace from the + * result document. Which nodes are removed depends on a conservative + * heuristic. The reindenting feature of the serialization code relies + * on this option to be set when parsing. Use of this option is + * DISCOURAGED. + * + * HTML_PARSE_NONET + * + * No effect. + * + * HTML_PARSE_NOIMPLIED + * + * Do not add implied html, head or body elements. + * + * HTML_PARSE_COMPACT + * + * Store small strings directly in the node struct to save + * memory. + * + * HTML_PARSE_HUGE + * + * Relax some internal limits. + * + * Available since 2.14.0. Use XML_PARSE_HUGE works with older + * versions. + * + * Maximum size of text nodes, tags, comments, CDATA sections + * + * normal: 10M + * huge: 1B + * + * Maximum size of names, system literals, pubid literals + * + * normal: 50K + * huge: 10M + * + * Maximum nesting depth of elements + * + * normal: 256 + * huge: 2048 + * + * HTML_PARSE_IGNORE_ENC + * + * Ignore the encoding in the HTML declaration. This option is + * mostly unneeded these days. The only effect is to enforce + * UTF-8 decoding of ASCII-like data. + * + * HTML_PARSE_BIG_LINES + * + * Enable reporting of line numbers larger than 65535. + * + * Available since 2.14.0. + * + * Returns 0 in case of success, the set of unknown or unimplemented options + * in case of error. + */ +int +htmlCtxtSetOptions(xmlParserCtxtPtr ctxt, int options) +{ + return(htmlCtxtSetOptionsInternal(ctxt, options, 0)); +} + +/** + * htmlCtxtUseOptions: + * @ctxt: an HTML parser context + * @options: a combination of htmlParserOption(s) + * + * DEPRECATED: Use htmlCtxtSetOptions. + * + * Applies the options to the parser context. The following options + * are never cleared and can only be enabled: + * + * HTML_PARSE_NODEFDTD + * HTML_PARSE_NOERROR + * HTML_PARSE_NOWARNING + * HTML_PARSE_NOIMPLIED + * HTML_PARSE_COMPACT + * HTML_PARSE_HUGE + * HTML_PARSE_IGNORE_ENC + * HTML_PARSE_BIG_LINES + * + * Returns 0 in case of success, the set of unknown or unimplemented options + * in case of error. + */ +int +htmlCtxtUseOptions(htmlParserCtxtPtr ctxt, int options) +{ + int keepMask; + + /* + * For historic reasons, some options can only be enabled. + */ + keepMask = HTML_PARSE_NODEFDTD | + HTML_PARSE_NOERROR | + HTML_PARSE_NOWARNING | + HTML_PARSE_NOIMPLIED | + HTML_PARSE_COMPACT | + HTML_PARSE_HUGE | + HTML_PARSE_IGNORE_ENC | + HTML_PARSE_BIG_LINES; + + return(htmlCtxtSetOptionsInternal(ctxt, options, keepMask)); +} + +/** + * htmlCtxtParseDocument: + * @ctxt: an HTML parser context + * @input: parser input + * + * Parse an HTML document and return the resulting document tree. + * + * Available since 2.13.0. + * + * Returns the resulting document tree or NULL + */ +htmlDocPtr +htmlCtxtParseDocument(htmlParserCtxtPtr ctxt, xmlParserInputPtr input) +{ + htmlDocPtr ret; + + if ((ctxt == NULL) || (input == NULL)) { + xmlFatalErr(ctxt, XML_ERR_ARGUMENT, NULL); + xmlFreeInputStream(input); + return(NULL); + } + + /* assert(ctxt->inputNr == 0); */ + while (ctxt->inputNr > 0) + xmlFreeInputStream(xmlCtxtPopInput(ctxt)); + + if (xmlCtxtPushInput(ctxt, input) < 0) { + xmlFreeInputStream(input); + return(NULL); + } + + ctxt->html = 1; + htmlParseDocument(ctxt); + + if (ctxt->errNo != XML_ERR_NO_MEMORY) { + ret = ctxt->myDoc; + } else { + ret = NULL; + xmlFreeDoc(ctxt->myDoc); + } + ctxt->myDoc = NULL; + + /* assert(ctxt->inputNr == 1); */ + while (ctxt->inputNr > 0) + xmlFreeInputStream(xmlCtxtPopInput(ctxt)); + + return(ret); +} + +/** + * htmlReadDoc: + * @str: a pointer to a zero terminated string + * @url: only used for error reporting (optoinal) + * @encoding: the document encoding (optional) + * @options: a combination of htmlParserOptions + * + * Convenience function to parse an HTML document from a zero-terminated + * string. + * + * See htmlCtxtReadDoc for details. + * + * Returns the resulting document tree. + */ +htmlDocPtr +htmlReadDoc(const xmlChar *str, const char *url, const char *encoding, + int options) +{ + htmlParserCtxtPtr ctxt; + xmlParserInputPtr input; + htmlDocPtr doc = NULL; + + ctxt = htmlNewParserCtxt(); + if (ctxt == NULL) + return(NULL); + + htmlCtxtUseOptions(ctxt, options); + + input = xmlCtxtNewInputFromString(ctxt, url, (const char *) str, encoding, + XML_INPUT_BUF_STATIC); + + if (input != NULL) + doc = htmlCtxtParseDocument(ctxt, input); + + htmlFreeParserCtxt(ctxt); + return(doc); +} + +/** + * htmlReadFile: + * @filename: a file or URL + * @encoding: the document encoding (optional) + * @options: a combination of htmlParserOptions + * + * Convenience function to parse an HTML file from the filesystem, + * the network or a global user-defined resource loader. + * + * See htmlCtxtReadFile for details. + * + * Returns the resulting document tree. + */ +htmlDocPtr +htmlReadFile(const char *filename, const char *encoding, int options) +{ + htmlParserCtxtPtr ctxt; + xmlParserInputPtr input; + htmlDocPtr doc = NULL; + + ctxt = htmlNewParserCtxt(); + if (ctxt == NULL) + return(NULL); + + htmlCtxtUseOptions(ctxt, options); + + input = xmlCtxtNewInputFromUrl(ctxt, filename, NULL, encoding, 0); + + if (input != NULL) + doc = htmlCtxtParseDocument(ctxt, input); + + htmlFreeParserCtxt(ctxt); + return(doc); +} + +/** + * htmlReadMemory: + * @buffer: a pointer to a char array + * @size: the size of the array + * @url: only used for error reporting (optional) + * @encoding: the document encoding, or NULL + * @options: a combination of htmlParserOption(s) + * + * Convenience function to parse an HTML document from memory. + * The input buffer must not contain any terminating null bytes. + * + * See htmlCtxtReadMemory for details. + * + * Returns the resulting document tree + */ +htmlDocPtr +htmlReadMemory(const char *buffer, int size, const char *url, + const char *encoding, int options) +{ + htmlParserCtxtPtr ctxt; + xmlParserInputPtr input; + htmlDocPtr doc = NULL; + + if (size < 0) + return(NULL); + + ctxt = htmlNewParserCtxt(); + if (ctxt == NULL) + return(NULL); + + htmlCtxtUseOptions(ctxt, options); + + input = xmlCtxtNewInputFromMemory(ctxt, url, buffer, size, encoding, + XML_INPUT_BUF_STATIC); + + if (input != NULL) + doc = htmlCtxtParseDocument(ctxt, input); + + htmlFreeParserCtxt(ctxt); + return(doc); +} + +/** + * htmlReadFd: + * @fd: an open file descriptor + * @url: only used for error reporting (optional) + * @encoding: the document encoding, or NULL + * @options: a combination of htmlParserOptions + * + * Convenience function to parse an HTML document from a + * file descriptor. + * + * NOTE that the file descriptor will not be closed when the + * context is freed or reset. + * + * See htmlCtxtReadFd for details. + * + * Returns the resulting document tree + */ +htmlDocPtr +htmlReadFd(int fd, const char *url, const char *encoding, int options) +{ + htmlParserCtxtPtr ctxt; + xmlParserInputPtr input; + htmlDocPtr doc = NULL; + + ctxt = htmlNewParserCtxt(); + if (ctxt == NULL) + return(NULL); + + htmlCtxtUseOptions(ctxt, options); + + input = xmlCtxtNewInputFromFd(ctxt, url, fd, encoding, 0); + + if (input != NULL) + doc = htmlCtxtParseDocument(ctxt, input); + + htmlFreeParserCtxt(ctxt); + return(doc); +} + +/** + * htmlReadIO: + * @ioread: an I/O read function + * @ioclose: an I/O close function (optional) + * @ioctx: an I/O handler + * @url: only used for error reporting (optional) + * @encoding: the document encoding (optional) + * @options: a combination of htmlParserOption(s) + * + * Convenience function to parse an HTML document from I/O functions + * and context. + * + * See htmlCtxtReadIO for details. + * + * Returns the resulting document tree + */ +htmlDocPtr +htmlReadIO(xmlInputReadCallback ioread, xmlInputCloseCallback ioclose, + void *ioctx, const char *url, const char *encoding, int options) +{ + htmlParserCtxtPtr ctxt; + xmlParserInputPtr input; + htmlDocPtr doc = NULL; + + ctxt = htmlNewParserCtxt(); + if (ctxt == NULL) + return (NULL); + + htmlCtxtUseOptions(ctxt, options); + + input = xmlCtxtNewInputFromIO(ctxt, url, ioread, ioclose, ioctx, + encoding, 0); + + if (input != NULL) + doc = htmlCtxtParseDocument(ctxt, input); + + htmlFreeParserCtxt(ctxt); + return(doc); +} + +/** + * htmlCtxtReadDoc: + * @ctxt: an HTML parser context + * @str: a pointer to a zero terminated string + * @URL: only used for error reporting (optional) + * @encoding: the document encoding (optional) + * @options: a combination of htmlParserOptions + * + * Parse an HTML in-memory document and build a tree. + * + * See htmlCtxtUseOptions for details. + * + * Returns the resulting document tree + */ +htmlDocPtr +htmlCtxtReadDoc(htmlParserCtxtPtr ctxt, const xmlChar *str, + const char *URL, const char *encoding, int options) +{ + xmlParserInputPtr input; + + if (ctxt == NULL) + return (NULL); + + htmlCtxtReset(ctxt); + htmlCtxtUseOptions(ctxt, options); + + input = xmlCtxtNewInputFromString(ctxt, URL, (const char *) str, + encoding, 0); + if (input == NULL) + return(NULL); + + return(htmlCtxtParseDocument(ctxt, input)); +} + +/** + * htmlCtxtReadFile: + * @ctxt: an HTML parser context + * @filename: a file or URL + * @encoding: the document encoding (optional) + * @options: a combination of htmlParserOptions + * + * Parse an HTML file from the filesystem, the network or a + * user-defined resource loader. + * + * See htmlCtxtUseOptions for details. + * + * Returns the resulting document tree + */ +htmlDocPtr +htmlCtxtReadFile(htmlParserCtxtPtr ctxt, const char *filename, + const char *encoding, int options) +{ + xmlParserInputPtr input; + + if (ctxt == NULL) + return (NULL); + + htmlCtxtReset(ctxt); + htmlCtxtUseOptions(ctxt, options); + + input = xmlCtxtNewInputFromUrl(ctxt, filename, NULL, encoding, 0); + if (input == NULL) + return(NULL); + + return(htmlCtxtParseDocument(ctxt, input)); +} + +/** + * htmlCtxtReadMemory: + * @ctxt: an HTML parser context + * @buffer: a pointer to a char array + * @size: the size of the array + * @URL: only used for error reporting (optional) + * @encoding: the document encoding (optinal) + * @options: a combination of htmlParserOptions + * + * Parse an HTML in-memory document and build a tree. The input buffer must + * not contain any terminating null bytes. + * + * See htmlCtxtUseOptions for details. + * + * Returns the resulting document tree + */ +htmlDocPtr +htmlCtxtReadMemory(htmlParserCtxtPtr ctxt, const char *buffer, int size, + const char *URL, const char *encoding, int options) +{ + xmlParserInputPtr input; + + if ((ctxt == NULL) || (size < 0)) + return (NULL); + + htmlCtxtReset(ctxt); + htmlCtxtUseOptions(ctxt, options); + + input = xmlCtxtNewInputFromMemory(ctxt, URL, buffer, size, encoding, + XML_INPUT_BUF_STATIC); + if (input == NULL) + return(NULL); + + return(htmlCtxtParseDocument(ctxt, input)); +} + +/** + * htmlCtxtReadFd: + * @ctxt: an HTML parser context + * @fd: an open file descriptor + * @URL: only used for error reporting (optional) + * @encoding: the document encoding (optinal) + * @options: a combination of htmlParserOptions + * + * Parse an HTML from a file descriptor and build a tree. + * + * See htmlCtxtUseOptions for details. + * + * NOTE that the file descriptor will not be closed when the + * context is freed or reset. + * + * Returns the resulting document tree + */ +htmlDocPtr +htmlCtxtReadFd(htmlParserCtxtPtr ctxt, int fd, + const char *URL, const char *encoding, int options) +{ + xmlParserInputPtr input; + + if (ctxt == NULL) + return(NULL); + + htmlCtxtReset(ctxt); + htmlCtxtUseOptions(ctxt, options); + + input = xmlCtxtNewInputFromFd(ctxt, URL, fd, encoding, 0); + if (input == NULL) + return(NULL); + + return(htmlCtxtParseDocument(ctxt, input)); +} + +/** + * htmlCtxtReadIO: + * @ctxt: an HTML parser context + * @ioread: an I/O read function + * @ioclose: an I/O close function + * @ioctx: an I/O handler + * @URL: the base URL to use for the document + * @encoding: the document encoding, or NULL + * @options: a combination of htmlParserOption(s) + * + * Parse an HTML document from I/O functions and source and build a tree. + * + * See htmlCtxtUseOptions for details. + * + * Returns the resulting document tree + */ +htmlDocPtr +htmlCtxtReadIO(htmlParserCtxtPtr ctxt, xmlInputReadCallback ioread, + xmlInputCloseCallback ioclose, void *ioctx, + const char *URL, + const char *encoding, int options) +{ + xmlParserInputPtr input; + + if (ctxt == NULL) + return (NULL); + + htmlCtxtReset(ctxt); + htmlCtxtUseOptions(ctxt, options); + + input = xmlCtxtNewInputFromIO(ctxt, URL, ioread, ioclose, ioctx, + encoding, 0); + if (input == NULL) + return(NULL); + + return(htmlCtxtParseDocument(ctxt, input)); +} + +#endif /* LIBXML_HTML_ENABLED */