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/*
* Copyright (c) 2004, Nate Nielsen
* 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.
* * The names of contributors to this software may not 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 THE
* COPYRIGHT OWNER 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.
*
*
* CONTRIBUTORS
* Nate Nielsen <nielsen@memberwebs.com>
*
*/
// SABLOTRON C++ WRAPPER CONVERSION FUNCTIONS
//
#include <wchar.h>
#include "sablo.h"
bool DOM::transcode16to8(const std::basic_string<wchar_t>& data,
std::basic_string<char>& ret)
{
ret.resize(0);
ret.reserve(data.length() + (data.length() / 2));
// basic_string.c_str doesn't work properly everywhere
// most notably not in the g++ std library
const wchar_t* c = data.length() ? data.data() : L"";
const wchar_t* e = c + data.length();
for( ; c < e; c++)
{
if(*c <= 0x007F)
{
ret.append(1, (char)*c);
}
else if(*c <= 0x07FF)
{
ret.append(1, (char)(192 | (*c >> 6)));
ret.append(1, (char)(128 | (*c & 63)));
}
else
{
ret.append(1, (char)(224 | (*c >> 12)));
ret.append(1, (char)(128 | ((*c >> 6) & 63)));
ret.append(1, (char)(128 | (*c & 63)) );
}
}
return true;
}
bool DOM::transcode8to16(const std::basic_string<char>& data,
std::basic_string<wchar_t>& ret)
{
ret.resize(0);
ret.reserve(data.length());
// basic_string.c_str doesn't work properly everywhere
// most notably not in the g++ std library
const char* c = data.length() ? data.data() : "";
const char* e = c + data.length();
for( ; c < e; c++)
{
// First 4 bits set
if((c[0] & 0xF8) == 0xF0 &&
(c[1] & 0xC0) == 0x80 &&
(c[2] & 0xC0) == 0x80 &&
(c[3] & 0xC0) == 0x80)
{
ret.append(1, (wchar_t)(((wchar_t)c[0] & 7) << 18 |
((wchar_t)c[1] & 63) << 12 |
((wchar_t)c[2] & 63) << 6 |
((wchar_t)c[3] & 63)));
c += 3;
}
// First 3 bits set
else if((c[0] & 0xF0) == 0xE0 &&
(c[1] & 0xC0) == 0x80 &&
(c[2] & 0xC0) == 0x80)
{
ret.append(1, (wchar_t)(((wchar_t)c[0] & 15) << 12 |
((wchar_t)c[1] & 63) << 6 |
((wchar_t)c[2] & 63)));
c += 2;
}
// First 2 bits set
else if((c[0] & 0xE0) == 0xC0 &&
(c[1] & 0xC0) == 0x80)
{
ret.append(1, (wchar_t)(((wchar_t)c[0] & 31) << 6 |
((wchar_t)c[1] & 63)));
c += 1;
}
// First bit set
else if(!(c[0] & 0x80))
{
ret.append(1, (wchar_t)c[0]);
}
else
return false;
}
return true;
}
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