Hendrik Lipka
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
Diff: spxmlcodec.cpp
- Revision:
- 0:3fa97f2c0505
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/spxmlcodec.cpp Wed Nov 24 20:52:14 2010 +0000
@@ -0,0 +1,177 @@
+/*
+ * 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 ) );
+ }
+}
+