/* Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd

   See the file COPYING for copying permission.

*/

#include "codepage.h"

#if (defined(WIN32) || (defined(__WATCOMC__) && defined(__NT__)))

#define STRICT 1

#define WIN32_LEAN_AND_MEAN 1

#include <windows.h>

int

codepageMap(int cp, int *map)

{

  int i;

  CPINFO info;

  if (!GetCPInfo(cp, &info) || info.MaxCharSize > 2)

    return 0;

  for (i = 0; i < 256; i++)

    map[i] = -1;

  if (info.MaxCharSize > 1) {

    for (i = 0; i < MAX_LEADBYTES; i+=2) {

      int j, lim;

      if (info.LeadByte[i] == 0 && info.LeadByte[i + 1] == 0)

        break;

      lim = info.LeadByte[i + 1];

      for (j = info.LeadByte[i]; j <= lim; j++)

        map[j] = -2;

    }

  }

  for (i = 0; i < 256; i++) {

   if (map[i] == -1) {

     char c = (char)i;

     unsigned short n;

     if (MultiByteToWideChar(cp, MB_PRECOMPOSED|MB_ERR_INVALID_CHARS,

                             &c, 1, &n, 1) == 1)

       map[i] = n;

   }

  }

  return 1;

}

int

codepageConvert(int cp, const char *p)

{

  unsigned short c;

  if (MultiByteToWideChar(cp, MB_PRECOMPOSED|MB_ERR_INVALID_CHARS,

                          p, 2, &c, 1) == 1)

    return c;

  return -1;

}

#else /* not WIN32 */

int

codepageMap(int cp, int *map)

{

  return 0;

}

int

codepageConvert(int cp, const char *p)

{

  return -1;

}

#endif /* not WIN32 */