reactos/lib/sdk/crt/printf/_snwprintf.c

   1 /*
   2  * COPYRIGHT:       GNU GPL, see COPYING in the top level directory
   3  * PROJECT:         ReactOS crt library
   4  * FILE:            lib/sdk/crt/printf/_snwprintf.c
   5  * PURPOSE:         Implementation of _snwprintf
   6  * PROGRAMMER:      Timo Kreuzer
   7  */
   8
   9 #include <stdio.h>
  10 #include <stdarg.h>
  11
  12 int _cdecl wstreamout(FILE *stream, const wchar_t *format, va_list argptr);
  13
  14 int
  15 __cdecl
  16 _snwprintf(
  17    wchar_t *buffer,
  18    size_t count,
  19    const wchar_t *format,
  20    ...)
  21 {
  22     va_list argptr;
  23     int result;
  24     FILE stream;
  25
  26     stream._base = (char*)buffer;
  27     stream._ptr = stream._base;
  28     stream._bufsiz = count * sizeof(wchar_t);
  29     stream._cnt = stream._bufsiz;
  30     stream._flag = _IOSTRG | _IOWRT;
  31     stream._tmpfname = 0;
  32     stream._charbuf = 0;
  33
  34     va_start(argptr, format);
  35     result = wstreamout(&stream, format, argptr);
  36     va_end(argptr);
  37
  38     /* Only zero terminate if there is enough space left */
  39     if (stream._cnt >= sizeof(wchar_t)) *(wchar_t*)stream._ptr = L'\0';
  40
  41     return result;
  42 }