/*
    unicode.cpp
    Copyright (C) 2007 Acekard, www.acekard.com
    Copyright (C) 2008 somebody
    Copyright (C) 2009 yellow wood goblin

    This program 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 3 of the License, or
    (at your option) any later version.

    This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/

#include "unicode.h"

std::string unicode_to_local_string( const u16 * unicode_string, size_t length, bool * defCharUsed )
{
  if(defCharUsed) *defCharUsed=false;
  std::string ret;
  const u16* end=unicode_string+length;
  while(*unicode_string&&unicode_string<end)
  {
    u16 data=*unicode_string++;
    if(data<0x80)
    {
      ret.push_back(data);
    }
    else if(data<0x800)
    {
      ret.push_back(0xc0|((data>>6)&0x1f));
      ret.push_back(0x80|(data&0x3f));
    }
    else
    {
      ret.push_back(0xe0|((data>>12)&0x0f));
      ret.push_back(0x80|((data>>6)&0x3f));
      ret.push_back(0x80|(data&0x3f));
    }
  }
  return ret;
}