lib/sdk/crt/stdlib/mbtowc.c

   1 /*
   2  * COPYRIGHT:   See COPYING in the top level directory
   3  * PROJECT:     ReactOS system libraries
   4  * FILE:        lib/crt/??????
   5  * PURPOSE:     Unknown
   6  * PROGRAMER:   Unknown
   7  * UPDATE HISTORY:
   8  *              25/11/05: Added license header
   9  */
  10
  11 #include <precomp.h>
  12
  13 /*********************************************************************
  14  *              _mbtowc_l(MSVCRT.@)
  15  */
  16 int CDECL _mbtowc_l(wchar_t *dst, const char* str, size_t n, _locale_t locale)
  17 {
  18     MSVCRT_pthreadlocinfo locinfo;
  19     wchar_t tmpdst = '\0';
  20
  21     if(!locale)
  22         locinfo = get_locinfo();
  23     else
  24         locinfo = (MSVCRT_pthreadlocinfo)(locale->locinfo);
  25
  26     if(n <= 0 || !str)
  27         return 0;
  28     if(!locinfo->lc_codepage)
  29         tmpdst = (unsigned char)*str;
  30     else if(!MultiByteToWideChar(locinfo->lc_codepage, 0, str, n, &tmpdst, 1))
  31         return -1;
  32     if(dst)
  33         *dst = tmpdst;
  34     /* return the number of bytes from src that have been used */
  35     if(!*str)
  36         return 0;
  37     if(n >= 2 && _isleadbyte_l((unsigned char)*str, locale) && str[1])
  38         return 2;
  39     return 1;
  40 }
  41
  42 /*********************************************************************
  43  *              mbtowc(MSVCRT.@)
  44  */
  45 int CDECL mbtowc(wchar_t *dst, const char* str, size_t n)
  46 {
  47     return _mbtowc_l(dst, str, n, NULL);
  48 }