1/* Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd
2   See the file COPYING for copying permission.
3*/
4
5#include "codepage.h"
6#include "internal.h"  /* for UNUSED_P only */
7
8#if (defined(WIN32) || (defined(__WATCOMC__) && defined(__NT__)))
9#define STRICT 1
10#define WIN32_LEAN_AND_MEAN 1
11
12#include <windows.h>
13
14int
15codepageMap(int cp, int *map)
16{
17  int i;
18  CPINFO info;
19  if (!GetCPInfo(cp, &info) || info.MaxCharSize > 2)
20    return 0;
21  for (i = 0; i < 256; i++)
22    map[i] = -1;
23  if (info.MaxCharSize > 1) {
24    for (i = 0; i < MAX_LEADBYTES; i+=2) {
25      int j, lim;
26      if (info.LeadByte[i] == 0 && info.LeadByte[i + 1] == 0)
27        break;
28      lim = info.LeadByte[i + 1];
29      for (j = info.LeadByte[i]; j <= lim; j++)
30        map[j] = -2;
31    }
32  }
33  for (i = 0; i < 256; i++) {
34   if (map[i] == -1) {
35     char c = (char)i;
36     unsigned short n;
37     if (MultiByteToWideChar(cp, MB_PRECOMPOSED|MB_ERR_INVALID_CHARS,
38                             &c, 1, &n, 1) == 1)
39       map[i] = n;
40   }
41  }
42  return 1;
43}
44
45int
46codepageConvert(int cp, const char *p)
47{
48  unsigned short c;
49  if (MultiByteToWideChar(cp, MB_PRECOMPOSED|MB_ERR_INVALID_CHARS,
50                          p, 2, &c, 1) == 1)
51    return c;
52  return -1;
53}
54
55#else /* not WIN32 */
56
57int
58codepageMap(int UNUSED_P(cp), int *UNUSED_P(map))
59{
60  return 0;
61}
62
63int
64codepageConvert(int UNUSED_P(cp), const char *UNUSED_P(p))
65{
66  return -1;
67}
68
69#endif /* not WIN32 */
70