ixmlparser.c

电驴下载工具eMule0.47aVeryCD的源代码,可作分析测试也可用于P2P软件的开发研究.

///////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2000-2003 Intel Corporation 
// All rights reserved. 
//
// Redistribution and use in source and binary forms, with or without 
// modification, are permitted provided that the following conditions are met: 
//
// * Redistributions of source code must retain the above copyright notice, 
// this list of conditions and the following disclaimer. 
// * Redistributions in binary form must reproduce the above copyright notice, 
// this list of conditions and the following disclaimer in the documentation 
// and/or other materials provided with the distribution. 
// * Neither name of Intel Corporation nor the names of its contributors 
// may be used to endorse or promote products derived from this software 
// without specific prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTEL OR 
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 
// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
///////////////////////////////////////////////////////////////////////////

#include <string.h>
#include "ixmlparser.h"

#ifdef _WIN32
#define strncasecmp strnicmp
#endif

static const char LESSTHAN = '<';
static const char GREATERTHAN = '>';
static const char SLASH = '/';
static const char EQUALS = '=';
static const char QUOTE = '\"';
static const char SINGLEQUOTE = '\'';

static const char *WHITESPACE = "\n\t\r ";
static const char *COMPLETETAG = "/>";
static const char *ENDTAG = "</";
static const char *XMLDECL = "<?xml ";
static const char *XMLDECL2 = "<?xml?";
static const char *BEGIN_COMMENT = "<!--";
static const char *END_COMMENT = "-->";
static const char *BEGIN_PI = "<?";
static const char *END_PI = "?>";
static const char *BEGIN_DOCTYPE = "<!DOCTYPE";
static const char *CDSTART = "<![CDATA[";
static const char *CDEND = "]]>";
static const char *DEC_NUMBERS = "0123456789";
static const char *HEX_NUMBERS = "0123456789ABCDEFabcdef";

typedef struct char_info {
    unsigned short l,
      h;
} char_info_t;

typedef char utf8char[8];

/*==============================================================================*
*	Letter table contains all characters in XML 1.0 plus ":", "_" and
*   ideographic.
*
*   This table contains all the characters that an element name can start with.
*   See XML 1.0 (2nd Edition) for more details.	
*
*===============================================================================*/
static char_info_t Letter[] = {
    {0x003A, 0x003A},           // character ":"
    {0x0041, 0x005A},
    {0x005F, 0x005F},           // character "_"
    {0x0061, 0x007A}, {0x00C0, 0x00D6}, {0x00D8, 0x00F6}, {0x00F8, 0x00FF},
    {0x0100, 0x0131}, {0x0134, 0x013E}, {0x0141, 0x0148}, {0x014A, 0x017E},
    {0x0180, 0x01C3}, {0x01CD, 0x01F0}, {0x01F4, 0x01F5}, {0x01FA, 0x0217},
    {0x0250, 0x02A8}, {0x02BB, 0x02C1}, {0x0386, 0x0386}, {0x0388, 0x038A},
    {0x038C, 0x038C}, {0x038E, 0x03A1}, {0x03A3, 0x03CE}, {0x03D0, 0x03D6},
    {0x03DA, 0x03DA},
    {0x03DC, 0x03DC}, {0x03DE, 0x03DE}, {0x03E0, 0x03E0}, {0x03E2, 0x03F3},
    {0x0401, 0x040C}, {0x040E, 0x044F}, {0x0451, 0x045C}, {0x045E, 0x0481},
    {0x0490, 0x04C4}, {0x04C7, 0x04C8}, {0x04CB, 0x04CC}, {0x04D0, 0x04EB},
    {0x04EE, 0x04F5}, {0x04F8, 0x04F9}, {0x0531, 0x0556}, {0x0559, 0x0559},
    {0x0561, 0x0586}, {0x05D0, 0x05EA}, {0x05F0, 0x05F2}, {0x0621, 0x063A},
    {0x0641, 0x064A}, {0x0671, 0x06B7}, {0x06BA, 0x06BE}, {0x06C0, 0x06CE},
    {0x06D0, 0x06D3}, {0x06D5, 0x06D5}, {0x06E5, 0x06E6}, {0x0905, 0x0939},
    {0x093D, 0x093D}, {0x0958, 0x0961}, {0x0985, 0x098C}, {0x098F, 0x0990},
    {0x0993, 0x09A8}, {0x09AA, 0x09B0}, {0x09B2, 0x09B2}, {0x09B6, 0x09B9},
    {0x09DC, 0x09DD}, {0x09DF, 0x09E1}, {0x09F0, 0x09F1}, {0x0A05, 0x0A0A},
    {0x0A0F, 0x0A10}, {0x0A13, 0x0A28}, {0x0A2A, 0x0A30}, {0x0A32, 0x0A33},
    {0x0A35, 0x0A36}, {0x0A38, 0x0A39}, {0x0A59, 0x0A5C}, {0x0A5E, 0x0A5E},
    {0x0A72, 0x0A74}, {0x0A85, 0x0A8B}, {0x0A8D, 0x0A8D}, {0x0A8F, 0x0A91},
    {0x0A93, 0x0AA8}, {0x0AAA, 0x0AB0}, {0x0AB2, 0x0AB3}, {0x0AB5, 0x0AB9},
    {0x0ABD, 0x0ABD}, {0x0AE0, 0x0AE0}, {0x0B05, 0x0B0C}, {0x0B0F, 0x0B10},
    {0x0B13, 0x0B28}, {0x0B2A, 0x0B30}, {0x0B32, 0x0B33}, {0x0B36, 0x0B39},
    {0x0B3D, 0x0B3D}, {0x0B5C, 0x0B5D}, {0x0B5F, 0x0B61}, {0x0B85, 0x0B8A},
    {0x0B8E, 0x0B90}, {0x0B92, 0x0B95}, {0x0B99, 0x0B9A}, {0x0B9C, 0x0B9C},
    {0x0B9E, 0x0B9F}, {0x0BA3, 0x0BA4}, {0x0BA8, 0x0BAA}, {0x0BAE, 0x0BB5},
    {0x0BB7, 0x0BB9}, {0x0C05, 0x0C0C}, {0x0C0E, 0x0C10}, {0x0C12, 0x0C28},
    {0x0C2A, 0x0C33}, {0x0C35, 0x0C39}, {0x0C60, 0x0C61}, {0x0C85, 0x0C8C},
    {0x0C8E, 0x0C90}, {0x0C92, 0x0CA8}, {0x0CAA, 0x0CB3}, {0x0CB5, 0x0CB9},
    {0x0CDE, 0x0CDE}, {0x0CE0, 0x0CE1}, {0x0D05, 0x0D0C}, {0x0D0E, 0x0D10},
    {0x0D12, 0x0D28}, {0x0D2A, 0x0D39}, {0x0D60, 0x0D61}, {0x0E01, 0x0E2E},
    {0x0E30, 0x0E30}, {0x0E32, 0x0E33}, {0x0E40, 0x0E45}, {0x0E81, 0x0E82},
    {0x0E84, 0x0E84}, {0x0E87, 0x0E88}, {0x0E8A, 0x0E8A}, {0x0E8D, 0x0E8D},
    {0x0E94, 0x0E97}, {0x0E99, 0x0E9F}, {0x0EA1, 0x0EA3}, {0x0EA5, 0x0EA5},
    {0x0EA7, 0x0EA7}, {0x0EAA, 0x0EAB}, {0x0EAD, 0x0EAE}, {0x0EB0, 0x0EB0},
    {0x0EB2, 0x0EB3}, {0x0EBD, 0x0EBD}, {0x0EC0, 0x0EC4}, {0x0F40, 0x0F47},
    {0x0F49, 0x0F69}, {0x10A0, 0x10C5}, {0x10D0, 0x10F6}, {0x1100, 0x1100},
    {0x1102, 0x1103}, {0x1105, 0x1107}, {0x1109, 0x1109}, {0x110B, 0x110C},
    {0x110E, 0x1112}, {0x113C, 0x113C}, {0x113E, 0x113E}, {0x1140, 0x1140},
    {0x114C, 0x114C}, {0x114E, 0x114E}, {0x1150, 0x1150}, {0x1154, 0x1155},
    {0x1159, 0x1159}, {0x115F, 0x1161}, {0x1163, 0x1163}, {0x1165, 0x1165},
    {0x1167, 0x1167}, {0x1169, 0x1169}, {0x116D, 0x116E}, {0x1172, 0x1173},
    {0x1175, 0x1175}, {0x119E, 0x119E}, {0x11A8, 0x11A8}, {0x11AB, 0x11AB},
    {0x11AE, 0x11AF}, {0x11B7, 0x11B8}, {0x11BA, 0x11BA}, {0x11BC, 0x11C2},
    {0x11EB, 0x11EB}, {0x11F0, 0x11F0}, {0x11F9, 0x11F9}, {0x1E00, 0x1E9B},
    {0x1EA0, 0x1EF9}, {0x1F00, 0x1F15}, {0x1F18, 0x1F1D}, {0x1F20, 0x1F45},
    {0x1F48, 0x1F4D}, {0x1F50, 0x1F57}, {0x1F59, 0x1F59}, {0x1F5B, 0x1F5B},
    {0x1F5D, 0x1F5D}, {0x1F5F, 0x1F7D}, {0x1F80, 0x1FB4}, {0x1FB6, 0x1FBC},
    {0x1FBE, 0x1FBE}, {0x1FC2, 0x1FC4}, {0x1FC6, 0x1FCC}, {0x1FD0, 0x1FD3},
    {0x1FD6, 0x1FDB}, {0x1FE0, 0x1FEC}, {0x1FF2, 0x1FF4}, {0x1FF6, 0x1FFC},
    {0x2126, 0x2126}, {0x212A, 0x212B}, {0x212E, 0x212E}, {0x2180, 0x2182},
    {0x3007, 0x3007}, {0x3021, 0x3029}, // these two are ideographic
    {0x3041, 0x3094}, {0x30A1, 0x30FA}, {0x3105, 0x312C},
    {0x4E00, 0x9FA5},           // ideographic
    {0xAC00, 0xD7A3}
};

#define LETTERTABLESIZE (sizeof(Letter)/sizeof(Letter[0]))

/*==============================================================================*
*   NameChar table contains
*   CombiningChar, Extender, Digit, '-', '.', less '_', ':'
*   NameChar ::= Digit | '-' | '.' | CombiningChar | Extender
*   See XML 1.0 2nd Edition 
*
*===============================================================================*/
static char_info_t NameChar[] = {
    {0x002D, 0x002D},           // character "-"
    {0x002E, 0x002E},           // character "."
    {0x0030, 0x0039},           // digit
    {0x00B7, 0x00B7}, {0x02D0, 0x02D0}, {0x02D1, 0x02D1},   // extended
    {0x0300, 0x0345}, {0x0360, 0x0361},
    {0x0387, 0x0387},           // extended
    {0x0483, 0x0486}, {0x0591, 0x05A1}, {0x05A3, 0x05B9},
    {0x05BB, 0x05BD}, {0x05BF, 0x05BF}, {0x05C1, 0x05C2}, {0x05C4, 0x05C4},
    {0x0640, 0x0640},           // extended
    {0x064B, 0x0652},
    {0x0660, 0x0669},           // digit
    {0x0670, 0x0670},
    {0x06D6, 0x06DC}, {0x06DD, 0x06DF}, {0x06E0, 0x06E4}, {0x06E7, 0x06E8},
    {0x06EA, 0x06ED},
    {0x06F0, 0x06F9},           // digit
    {0x0901, 0x0903}, {0x093C, 0x093C},
    {0x093E, 0x094C}, {0x094D, 0x094D}, {0x0951, 0x0954}, {0x0962, 0x0963},
    {0x0966, 0x096F},           // digit
    {0x0981, 0x0983}, {0x09BC, 0x09BC}, {0x09BE, 0x09BE},
    {0x09BF, 0x09BF}, {0x09C0, 0x09C4}, {0x09C7, 0x09C8}, {0x09CB, 0x09CD},
    {0x09D7, 0x09D7}, {0x09E2, 0x09E3},
    {0x09E6, 0x09EF},           // digit
    {0x0A02, 0x0A02},
    {0x0A3C, 0x0A3C}, {0x0A3E, 0x0A3E}, {0x0A3F, 0x0A3F}, {0x0A40, 0x0A42},
    {0x0A47, 0x0A48}, {0x0A4B, 0x0A4D},
    {0x0A66, 0x0A6F},           // digit
    {0x0A70, 0x0A71},
    {0x0A81, 0x0A83}, {0x0ABC, 0x0ABC}, {0x0ABE, 0x0AC5}, {0x0AC7, 0x0AC9},
    {0x0ACB, 0x0ACD},
    {0x0AE6, 0x0AEF},           // digit
    {0x0B01, 0x0B03}, {0x0B3C, 0x0B3C},
    {0x0B3E, 0x0B43}, {0x0B47, 0x0B48}, {0x0B4B, 0x0B4D}, {0x0B56, 0x0B57},
    {0x0B66, 0x0B6F},           // digit
    {0x0B82, 0x0B83}, {0x0BBE, 0x0BC2}, {0x0BC6, 0x0BC8},
    {0x0BCA, 0x0BCD}, {0x0BD7, 0x0BD7},
    {0x0BE7, 0x0BEF},           // digit
    {0x0C01, 0x0C03},
    {0x0C3E, 0x0C44}, {0x0C46, 0x0C48}, {0x0C4A, 0x0C4D}, {0x0C55, 0x0C56},
    {0x0C66, 0x0C6F},           // digit
    {0x0C82, 0x0C83}, {0x0CBE, 0x0CC4}, {0x0CC6, 0x0CC8},
    {0x0CCA, 0x0CCD}, {0x0CD5, 0x0CD6},
    {0x0CE6, 0x0CEF},           // digit
    {0x0D02, 0x0D03},
    {0x0D3E, 0x0D43}, {0x0D46, 0x0D48}, {0x0D4A, 0x0D4D}, {0x0D57, 0x0D57},
    {0x0D66, 0x0D6F},           // digit
    {0x0E31, 0x0E31}, {0x0E34, 0x0E3A},
    {0x0E46, 0x0E46},           // extended
    {0x0E47, 0x0E4E},
    {0x0E50, 0x0E59},           // digit
    {0x0EB1, 0x0EB1}, {0x0EB4, 0x0EB9},
    {0x0EBB, 0x0EBC},
    {0x0EC6, 0x0EC6},           // extended
    {0x0EC8, 0x0ECD},
    {0x0ED0, 0x0ED9},           // digit
    {0x0F18, 0x0F19},
    {0x0F20, 0x0F29},           // digit
    {0x0F35, 0x0F35}, {0x0F37, 0x0F37},
    {0x0F39, 0x0F39}, {0x0F3E, 0x0F3E}, {0x0F3F, 0x0F3F}, {0x0F71, 0x0F84},
    {0x0F86, 0x0F8B}, {0x0F90, 0x0F95}, {0x0F97, 0x0F97}, {0x0F99, 0x0FAD},
    {0x0FB1, 0x0FB7}, {0x0FB9, 0x0FB9}, {0x20D0, 0x20DC}, {0x20E1, 0x20E1},
    {0x3005, 0x3005},           // extended
    {0x302A, 0x302F},
    {0x3031, 0x3035},           // extended 
    {0x3099, 0x3099}, {0x309A, 0x309A}, // combining char
    {0x309D, 0x309E}, {0x30FC, 0x30FE}  // extended
};

#define NAMECHARTABLESIZE   (sizeof(NameChar)/sizeof(NameChar[0]))

// functions used in this file
static void Parser_free( Parser * myParser );
static int Parser_skipDocType( char **pstr );
static int Parser_skipProlog( Parser * xmlParser );
static int Parser_skipMisc( Parser * xmlParser );
static void Parser_freeElementStackItem( IXML_ElementStack * pItem );
static void Parser_freeNsURI( IXML_NamespaceURI * pNsURI );

static int Parser_getNextNode( Parser * myParser,
                               IXML_Node * newNode,
                               BOOL * isEnd );
static int Parser_getNextToken( Parser * myParser );
static int Parser_xmlNamespace( Parser * myParser,
                                IXML_Node * newNode );
static BOOL Parser_ElementPrefixDefined( Parser * myParser,
                                         IXML_Node * newNode,
                                         char **nsURI );
static int Parser_setElementNamespace( IXML_Element * newElement,
                                       char *nsURI );
static int Parser_parseDocument( IXML_Document ** retDoc,
                                 Parser * domParser );
static BOOL Parser_hasDefaultNamespace( Parser * xmlParser,
                                        IXML_Node * newNode,
                                        char **nsURI );
static int Parser_getChar( IN char *src,
                           INOUT int *cLen );

/*==============================================================================*
*   Parser_isCharInTable
*       will determine whether character c is in the table of tbl
*       (either Letter table or NameChar table)
*   
*===============================================================================*/
static BOOL
Parser_isCharInTable( IN int c,
                      IN char_info_t * tbl,
                      IN int sz )
{
    int t = 0,
      b = sz,
      m;

    while( t <= b ) {
        m = ( t + b ) / 2;
        if( c < tbl[m].l ) {
            b = m - 1;
        } else if( c > tbl[m].h ) {
            t = m + 1;
        } else {
            return TRUE;
        }
    }
    return FALSE;
}

/*==============================================================================*
*	Parser_isXmlChar
*	    see XML 1.0 (2nd Edition) 2.2.
*       Internal to parser only
*
*===============================================================================*/
static BOOL
Parser_isXmlChar( IN int c )
{
    return ( c == 0x9 || c == 0xA || c == 0xD ||
             ( c >= 0x20 && c <= 0xD7FF ) ||
             ( c >= 0xE000 && c <= 0xFFFD ) ||
             ( c >= 0x10000 && c <= 0x10FFFF ) );
}

/*==============================================================================*
*   Parser_isNameChar
*       check whether c (int) is in LetterTable or NameCharTable
*       Internal to parser only.
*
*===============================================================================*/
static BOOL
Parser_isNameChar( IN int c,
                   IN BOOL bNameChar )
{
    if( Parser_isCharInTable( c, Letter, LETTERTABLESIZE ) ) {
        return TRUE;
    }

    if( bNameChar
        && Parser_isCharInTable( c, NameChar, NAMECHARTABLESIZE ) ) {
        return TRUE;
    }
    return FALSE;
}

/*==============================================================================*
*   Parser_isValidXmlName
*       Check to see whether name is a valid xml name.
*       External function.
*
*===============================================================================*/
BOOL
Parser_isValidXmlName( IN DOMString name )
{
    char *pstr = NULL;
    int i = 0,
      nameLen = 0;

    assert( name != NULL );

    nameLen = strlen( name );

    pstr = name;
    if( Parser_isNameChar( *pstr, FALSE ) == TRUE ) {
        for( i = 1; i < nameLen; i++ ) {
            if( Parser_isNameChar( *( pstr + 1 ), TRUE ) == FALSE ) {   //illegal char
                return FALSE;
            }
        }
    }

    return TRUE;
}

/*==============================================================================*
*   Parser_intToUTF8:	
*       Encoding a character to its UTF-8 character string, and return its length
*       internal function.
*   
*===============================================================================*/
static int
Parser_intToUTF8( IN int c,
                  IN utf8char s )
{
    if( c < 0 ) {
        return 0;
    }

    if( c <= 127 ) {
        s[0] = c;
        s[1] = 0;
        return 1;
    } else if( c <= 0x07FF ) {  // 0x0080 < c <= 0x07FF
        s[0] = 0xC0 | ( c >> 6 );
        s[1] = 0x80 | ( c & 0x3f );
        s[2] = 0;
        return 2;
    } else if( c <= 0xFFFF ) {  // 0x0800 < c <= 0xFFFF
        s[0] = 0xE0 | ( c >> 12 );
        s[1] = 0x80 | ( ( c >> 6 ) & 0x3f );
        s[2] = 0x80 | ( c & 0x3f );
        s[3] = 0;
        return 3;
    } else if( c <= 0x1FFFFF ) {    // 0x10000 < c <= 0x1FFFFF
        s[0] = 0xF0 | ( c >> 18 );
        s[1] = 0x80 | ( ( c >> 12 ) & 0x3f );
        s[2] = 0x80 | ( ( c >> 6 ) & 0x3f );
        s[3] = 0x80 | ( c & 0x3f );
        s[4] = 0;
        return 4;
    } else if( c <= 0x3FFFFFF ) {   // 0x200000 < c <= 3FFFFFF
        s[0] = 0xF8 | ( c >> 24 );
        s[1] = 0x80 | ( ( c >> 18 ) & 0x3f );
        s[2] = 0x80 | ( ( c >> 12 ) & 0x3f );
        s[3] = 0x80 | ( ( c >> 6 ) & 0x3f );
        s[4] = 0x80 | ( c & 0x3f );
        s[5] = 0;
        return 5;
    } else if( c <= 0x7FFFFFFF ) {  // 0x4000000 < c <= 7FFFFFFF
        s[0] = 0xFC | ( c >> 30 );
        s[1] = 0x80 | ( ( c >> 24 ) & 0x3f );
        s[2] = 0x80 | ( ( c >> 18 ) & 0x3f );
        s[3] = 0x80 | ( ( c >> 12 ) & 0x3f );
        s[4] = 0x80 | ( ( c >> 6 ) & 0x3f );
        s[5] = 0x80 | ( c & 0x3f );
        s[6] = 0;
        return 6;
    } else {                    // illegal
        return 0;
    }
}