Mbed port of the Simple Plain Xml parser. See http://code.google.com/p/spxml/ for more details. This library uses less memory and is much better suited to streaming data than TinyXML (doesn\'t use as much C++ features, and especially works without streams). See http://mbed.org/users/hlipka/notebook/xml-parsing/ for usage examples.
Dependents: spxmltest_weather VFD_fontx2_weather weather_LCD_display News_LCD_display ... more
spxmlcodec.cpp
- Committer:
- hlipka
- Date:
- 2010-11-24
- Revision:
- 0:3fa97f2c0505
File content as of revision 0:3fa97f2c0505:
/* * Copyright 2007 Stephen Liu * LGPL, see http://code.google.com/p/spxml/ * For license terms, see the file COPYING along with this library. */ #include <string.h> #include <stdlib.h> #include <ctype.h> #include "spxmlcodec.hpp" #include "spxmlutils.hpp" const char * SP_XmlStringCodec :: DEFAULT_ENCODING = "utf-8"; const char SP_XmlStringCodec :: XML_CHARS [] = { '<', '>', '&', '\'', '"' }; const char * SP_XmlStringCodec :: ESC_CHARS [] = { "<", ">", "&", "'", """ }; int SP_XmlStringCodec :: decode( const char * encoding, const char * encodeValue, SP_XmlStringBuffer * outBuffer ) { int isUtf8 = ( 0 == strcasecmp( encoding, "utf-8" ) ); const char * pos = encodeValue; for( ; '\0' != *pos; ) { if( '&' == *pos ) { int index = -1; int len = 0; for( int i = 0; i < (int)( sizeof( ESC_CHARS ) / sizeof( ESC_CHARS[0] ) ); i++ ) { len = strlen( ESC_CHARS[ i ] ); if( 0 == strncmp( pos, ESC_CHARS[i], len ) ) { index = i; break; } } if( index >= 0 ) { outBuffer->append( XML_CHARS[ index ] ); pos += len; } else { char * next = ""; int ch = 0; if( '#' == *( pos + 1 ) ) { if( 'x' == *( pos + 2 ) ) { ch = strtol( pos + 3, &next, 16 ); } else { ch = strtol( pos + 2, &next, 10 ); } } // TODO: fully support xml entity, currently only support unicode entity if( ';' == *next && 0 != ch ) { if( isUtf8 ) { SP_XmlUtf8Codec::uni2utf8( ch, outBuffer ); } else { outBuffer->append( ch ); } pos = next + 1; } else { outBuffer->append( *pos++ ); } } } else { outBuffer->append( *pos++ ); } } return 0; } int SP_XmlStringCodec :: encode( const char * encoding, const char * decodeValue, SP_XmlStringBuffer * outBuffer ) { int isUtf8 = ( 0 == strcasecmp( encoding, "utf-8" ) ); const unsigned char * pos = (unsigned char *)decodeValue; for( ; '\0' != *pos; pos++ ) { int index = -1; for( int i = 0; i < (int)( sizeof( XML_CHARS ) / sizeof( XML_CHARS[0] ) ); i++ ) { if( XML_CHARS[i] == *pos ) { index = i; break; } } if( index >= 0 && '\'' != *pos ) { outBuffer->append( ESC_CHARS[ index ] ); } else { if( isUtf8 ) { int ch = 0; int len = SP_XmlUtf8Codec::utf82uni( (unsigned char*)pos, &ch ); if( len > 0 ) { pos += len - 1; char temp[ 32 ] = { 0 }; snprintf( temp, sizeof( temp ), "&#%d;", ch ); outBuffer->append( temp ); } else { outBuffer->append( *pos ); } } else { if( *pos < 32 ) { char temp[ 32 ] = { 0 }; snprintf( temp, sizeof( temp ), "&#%d;", *pos ); outBuffer->append( temp ); } else { outBuffer->append( *pos ); } } } } return 0; } int SP_XmlStringCodec :: isNameChar( const char * encoding, char c ) { if( 0 == strcasecmp( encoding, "utf-8" ) ) { return 1; } else { return isalnum(c) || c == ':' || c == '-' || c == '.' || c == '_'; } } //========================================================= int SP_XmlUtf8Codec :: utf82uni( const unsigned char * utf8, int * ch ) { int len = 0; unsigned char c1 = 0, c2 = 0, c3 = 0, c4 = 0; if( *utf8 >= 0x80 ) { c1 = *utf8++; if( c1 < 0xE0 ) { // 2 bytes if( '\0' != ( c2 = *utf8 ) ) { *ch = ((c1 & 0x1F) << 6) | (c2 & 0x3F); len = 2; } } else if( c1 < 0xF0 ) { // 3 bytes if( '\0' != ( c2 = *utf8++ ) && '\0' != ( c3 = *utf8 ) ) { *ch = ((c1 & 0x0F) << 12) | ((c2 & 0x3F) << 6)| (c3 & 0x3F); len = 3; } } else { // 4 bytes if( '\0' != ( c2 = *utf8++ ) && '\0' != ( c3 = *utf8++ ) && '\0' != ( c4 = *utf8 ) ) { *ch = ((c1 & 0x07) << 16) | ((c2 & 0x3F) << 12) | ((c3 & 0x3F) << 6) | (c4 & 0x3F); len = 4; } } } return len; } void SP_XmlUtf8Codec :: uni2utf8( int ch, SP_XmlStringBuffer * outBuffer ) { if( ch < 0x80 ) outBuffer->append( ch ); else if( ch < 0x800 ) { outBuffer->append( 0xC0 | ( ch >> 6 ) ); outBuffer->append( 0x80 | ( ch & 0x3F ) ); } else if( ch < 0x10000 ) { outBuffer->append( 0xE0 | ( ch >> 12 ) ); outBuffer->append( 0x80 | ( ( ch >> 6 ) & 0x3F ) ); outBuffer->append( 0x80 | ( ch & 0x3F ) ); } else if( ch < 0x200000 ) { outBuffer->append( 0xF0 | ( ch >> 18 ) ); outBuffer->append( 0x80 | ( ( ch >> 12 ) & 0x3F ) ); outBuffer->append( 0x80 | ( ( ch >> 6 ) & 0x3F ) ); outBuffer->append( 0x80 | ( ch & 0x3F ) ); } }