//
// "$Id: fl_encoding_latin1.cxx 6616 2009-01-01 21:28:26Z matt $"
//
// Convert MSWindows-1252 (Latin-1) encoded text to the local encoding.
//
// Copyright 1998-2009 by Bill Spitzak and others.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library 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
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
// Please report all bugs and problems on the following page:
//
//     http://www.fltk.org/str.php
//

#include <FL/fl_draw.H>
#include <FL/Enumerations.H>
#include <stdlib.h>
#include "flstring.h"

#ifdef __APPLE__
 
// These function assume a western code page. If you need to support 
// scripts that are not part of this code page, you might want to
// take a look at FLTK2, which uses utf8 for text encoding.
//
// By keeping these conversion tables in their own module, they will not
// be statically linked (by a smart linker) unless actually used.
//
// On MS-Windows, nothing need to be converted. We simply return the 
// original pointer.
//
// Most X11 implementations seem to default to Latin-1 as a code since it
// is a superset of ISO 8859-1, the original wetsern codepage on X11.
//
// Apple's OS X however renders text in MacRoman for western settings. The
// lookup tables below will convert all common character codes and replace
// unknown characters with an upsidedown question mark.

// This table converts MSWindows-1252/Latin 1 into MacRoman encoding
static uchar latin2roman[128] = {
0xdb, 0xc0, 0xe2, 0xc4, 0xe3, 0xc9, 0xa0, 0xe0, 0xf6, 0xe4, 0xc0, 0xdc, 0xce, 0xc0, 0xc0, 0xc0, 
0xc0, 0xd4, 0xd5, 0xd2, 0xd3, 0xa5, 0xd0, 0xd1, 0xf7, 0xaa, 0xc0, 0xdd, 0xcf, 0xc0, 0xc0, 0xd9, 
0xca, 0xc1, 0xa2, 0xa3, 0xc0, 0xb4, 0xc0, 0xa4, 0xac, 0xa9, 0xbb, 0xc7, 0xc2, 0xc0, 0xa8, 0xf8, 
0xa1, 0xb1, 0xc0, 0xc0, 0xab, 0xb5, 0xa6, 0xe1, 0xfc, 0xc0, 0xbc, 0xc8, 0xc0, 0xc0, 0xc0, 0xc0, 
0xcb, 0xe7, 0xe5, 0xcc, 0x80, 0x81, 0xae, 0x82, 0xe9, 0x83, 0xe6, 0xe8, 0xed, 0xea, 0xeb, 0xec, 
0xc0, 0x84, 0xf1, 0xee, 0xef, 0xcd, 0x85, 0xc0, 0xaf, 0xf4, 0xf2, 0xf3, 0x86, 0xc0, 0xc0, 0xa7, 
0x88, 0x87, 0x89, 0x8b, 0x8a, 0x8c, 0xbe, 0x8d, 0x8f, 0x8e, 0x90, 0x91, 0x93, 0x92, 0x94, 0x95, 
0xc0, 0x96, 0x98, 0x97, 0x99, 0x9b, 0x9a, 0xd6, 0xbf, 0x9d, 0x9c, 0x9e, 0x9f, 0xc0, 0xc0, 0xd8
};

// This table converts MacRoman into MSWindows-1252/Latin 1
static uchar roman2latin[128] = {
0xc4, 0xc5, 0xc7, 0xc9, 0xd1, 0xd6, 0xdc, 0xe1, 0xe0, 0xe2, 0xe4, 0xe3, 0xe5, 0xe7, 0xe9, 0xe8, 
0xea, 0xeb, 0xed, 0xec, 0xee, 0xef, 0xf1, 0xf3, 0xf2, 0xf4, 0xf6, 0xf5, 0xfa, 0xf9, 0xfb, 0xfc, 
0x86, 0xb0, 0xa2, 0xa3, 0xa7, 0x95, 0xb6, 0xdf, 0xae, 0xa9, 0x99, 0xb4, 0xa8, 0xbf, 0xc6, 0xd8, 
0xbf, 0xb1, 0xbf, 0xbf, 0xa5, 0xb5, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xaa, 0xba, 0xbf, 0xe6, 0xf8, 
0xbf, 0xa1, 0xac, 0xbf, 0x83, 0xbf, 0xbf, 0xab, 0xbb, 0x85, 0xa0, 0xc0, 0xc3, 0xd5, 0x8c, 0x9c, 
0x96, 0x97, 0x93, 0x94, 0x91, 0x92, 0xf7, 0xbf, 0xff, 0x9f, 0xbf, 0x80, 0x8b, 0x9b, 0xbf, 0xbf, 
0x87, 0xb7, 0x82, 0x84, 0x89, 0xc2, 0xca, 0xc1, 0xcb, 0xc8, 0xcd, 0xce, 0xcf, 0xcc, 0xd3, 0xd4, 
0xbf, 0xd2, 0xda, 0xdb, 0xd9, 0xbf, 0x88, 0x98, 0xaf, 0xbf, 0xbf, 0xbf, 0xb8, 0xbf, 0xbf, 0xbf
};

static char *buf = 0;
static int n_buf = 0;

const char *fl_latin1_to_local(const char *t, int n)  
{
  if (n==-1) n = strlen(t);
  if (n<=n_buf) {
    n_buf = (n + 257) & 0x7fffff00;
    if (buf) free(buf);
    buf = (char*)malloc(n_buf);
  }
  const uchar *src = (const uchar*)t;
  uchar *dst = (uchar*)buf;
  for ( ; n>0; n--) {
    uchar c = *src++;
    if (c>127) 
      *dst = latin2roman[c-128];
    else
      *dst = c;
  }
  //*dst = 0; // this would be wrong!
  return buf;
}

const char *fl_local_to_latin1(const char *t, int n)
{
  if (n==-1) n = strlen(t);
  if (n<=n_buf) {
    n_buf = (n + 257) & 0x7fffff00;
    if (buf) free(buf);
    buf = (char*)malloc(n_buf);
  }
  const uchar *src = (const uchar*)t;
  uchar *dst = (uchar*)buf;
  for ( ; n>0; n--) {
    uchar c = *src++;
    if (c>127)
      *dst++ = roman2latin[c-128];
    else
      *dst++ = c;
  }
  //*dst = 0; // this would be wrong
  return buf;
}

#else 

const char *fl_latin1_to_local(const char *t, int) 
{
  return t;
}

const char *fl_local_to_latin1(const char *t, int)
{
  return t;
}

#endif

//
// End of "$Id: fl_encoding_latin1.cxx 6616 2009-01-01 21:28:26Z matt $".
//