src/win32/utf-conv.c

   1 /*
   2  * Copyright (C) 2009-2012 the libgit2 contributors
   3  *
   4  * This file is part of libgit2, distributed under the GNU GPL v2 with
   5  * a Linking Exception. For full terms see the included COPYING file.
   6  */
   7
   8 #include "common.h"
   9 #include "utf-conv.h"
  10 #include "git2/windows.h"
  11
  12 /*
  13  * Default codepage value
  14  */
  15 static int _active_codepage = CP_UTF8;
  16
  17 void gitwin_set_codepage(unsigned int codepage)
  18 {
  19         _active_codepage = codepage;
  20 }
  21
  22 unsigned int gitwin_get_codepage(void)
  23 {
  24         return _active_codepage;
  25 }
  26
  27 void gitwin_set_utf8(void)
  28 {
  29         _active_codepage = CP_UTF8;
  30 }
  31
  32 wchar_t* gitwin_to_utf16(const char* str)
  33 {
  34         wchar_t* ret;
  35         size_t cb;
  36
  37         if (!str)
  38                 return NULL;
  39
  40         cb = strlen(str) * sizeof(wchar_t);
  41         if (cb == 0)
  42                 return (wchar_t *)git__calloc(1, sizeof(wchar_t));
  43
  44         /* Add space for null terminator */
  45         cb += sizeof(wchar_t);
  46
  47         ret = (wchar_t *)git__malloc(cb);
  48         if (!ret)
  49                 return NULL;
  50
  51         if (MultiByteToWideChar(_active_codepage, 0, str, -1, ret, (int)cb) == 0) {
  52                 giterr_set(GITERR_OS, "Could not convert string to UTF-16");
  53                 git__free(ret);
  54                 ret = NULL;
  55         }
  56
  57         return ret;
  58 }
  59
  60 int gitwin_append_utf16(wchar_t *buffer, const char *str, size_t len)
  61 {
  62         int result = MultiByteToWideChar(_active_codepage, 0, str, -1, buffer, (int)len);
  63         if (result == 0)
  64                 giterr_set(GITERR_OS, "Could not convert string to UTF-16");
  65         return result;
  66 }
  67
  68 char* gitwin_from_utf16(const wchar_t* str)
  69 {
  70         char* ret;
  71         size_t cb;
  72
  73         if (!str)
  74                 return NULL;
  75
  76         cb = wcslen(str) * sizeof(char);
  77         if (cb == 0)
  78                 return (char *)git__calloc(1, sizeof(char));
  79
  80         /* Add space for null terminator */
  81         cb += sizeof(char);
  82
  83         ret = (char*)git__malloc(cb);
  84         if (!ret)
  85                 return NULL;
  86
  87         if (WideCharToMultiByte(_active_codepage, 0, str, -1, ret, (int)cb, NULL, NULL) == 0) {
  88                 giterr_set(GITERR_OS, "Could not convert string to UTF-8");
  89                 git__free(ret);
  90                 ret = NULL;
  91         }
  92
  93         return ret;
  94
  95 }