libs/port/cpsymbol.c

   1 /*
   2  * CP_SYMBOL support
   3  *
   4  * Copyright 2000 Alexandre Julliard
   5  * Copyright 2004 Rein Klazes
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include "wine/unicode.h"
  23
  24 /* return -1 on dst buffer overflow */
  25 int wine_cpsymbol_mbstowcs( const char *src, int srclen, WCHAR *dst, int dstlen)
  26 {
  27     int len, i;
  28
  29     if (dstlen == 0) return srclen;
  30     len = dstlen > srclen ? srclen : dstlen;
  31     for (i = 0; i < len; i++)
  32     {
  33         unsigned char c = src[i];
  34         dst[i] = (c < 0x20) ? c : c + 0xf000;
  35     }
  36     if (srclen > len) return -1;
  37     return len;
  38 }
  39
  40 /* return -1 on dst buffer overflow, -2 on invalid character */
  41 int wine_cpsymbol_wcstombs( const WCHAR *src, int srclen, char *dst, int dstlen)
  42 {
  43     int len, i;
  44
  45     if (dstlen == 0) return srclen;
  46     len = dstlen > srclen ? srclen : dstlen;
  47     for (i = 0; i < len; i++)
  48     {
  49         if (src[i] < 0x20)
  50             dst[i] = src[i];
  51         else if (src[i] >= 0xf020 && src[i] < 0xf100)
  52             dst[i] = src[i] - 0xf000;
  53         else
  54             return -2;
  55     }
  56     if (srclen > len) return -1;
  57     return len;
  58 }