reactos/lib/crt/stdio/vsprintf.c

   1 /* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
   2 #include <stdio.h>
   3 #include <stdarg.h>
   4 #include <limits.h>
   5 #include <internal/file.h>
   6 #include <tchar.h>
   7
   8 /*
   9  * @implemented
  10  */
  11 int
  12 _vstprintf(_TCHAR *str, const _TCHAR *fmt, va_list ap)
  13 {
  14   FILE f = {0};
  15   int len;
  16
  17   f._flag = _IOWRT|_IOSTRG|_IOBINARY;
  18   f._ptr = (char*)str;
  19   f._cnt = INT_MAX;
  20   f._file = -1;
  21   len = _vftprintf(&f,fmt, ap);
  22   *(_TCHAR*)f._ptr = 0;
  23   return len;
  24 }
  25
  26
  27 /*
  28  * @implemented
  29  */
  30 int
  31 _vsntprintf(_TCHAR *str, size_t maxlen, const _TCHAR *fmt, va_list ap)
  32 {
  33   FILE f = {0};
  34   int len;
  35
  36   f._flag = _IOWRT|_IOSTRG|_IOBINARY;
  37   f._ptr = (char*)str;
  38   f._cnt = maxlen;
  39   f._file = -1;
  40   len = _vftprintf(&f,fmt, ap);
  41   // what if the buffer is full ??
  42   *(_TCHAR *)f._ptr = 0;
  43   return len;
  44 }