lib/sdk/crt/printf/_vsnprintf.c

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