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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* xml_encode_decode.cc
*
* Mon Jun 9 10:19:33 CEST 2008
* Copyright 2008 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of Pracro.
*
* Pracro is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Pracro is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Pracro; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "xml_encode_decode.h"
#include <string.h>
char xml_map[][2][16] =
{
{ "&", "&" }, // & must be first
{ "\'", "'" },
{ "\"", "&qout;" },
{ ">", ">" },
{ "<", "<" },
{ "", "" } // End marker
};
#define MAX_MAPS 5
std::string xml_encode(std::string str)
{
size_t pos;
for( int map = 0; map < MAX_MAPS; map++ ) {
pos = 0;
while( ( pos = str.find(xml_map[map][0], pos) ) != std::string::npos) {
str.replace(pos, strlen(xml_map[map][0]), xml_map[map][1]);
pos += strlen(xml_map[map][1]);
}
}
return str;
}
std::string xml_decode(std::string str)
{
size_t pos;
// Traverse backwards, to handle '&' last.
for( int map = MAX_MAPS - 1; map > -1; map-- ) {
pos = 0;
while( ( pos = str.find(xml_map[map][1], pos) ) != std::string::npos) {
str.replace(pos, strlen(xml_map[map][1]), xml_map[map][0]);
pos += strlen(xml_map[map][0]);
}
}
return str;
}
#ifdef TEST_XML_ENCODE_DECODE
int main()
{
std::string in = "&A<B>C\"D\'<>\"&E<>";
std::string enc = xml_encode(in);
std::string denc = xml_encode(enc);
std::string dec = xml_decode(denc);
std::string ddec = xml_decode(dec);
printf("Input: \"%s\" %d\n", in.c_str(), in.length());
printf("Encoded: \"%s\" %d\n", enc.c_str(), enc.length());
printf("DoubleEncoded: \"%s\" %d\n", denc.c_str(), denc.length());
printf("Decoded: \"%s\" %d\n", dec.c_str(), dec.length());
printf("DoubleDecoded: \"%s\" %d\n", ddec.c_str(), ddec.length());
if( in == ddec && enc == dec) return 0;
return 1;
}
#endif/*TEST_XML_ENCODE_DECODE*/
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