reactos/lib/crt/stdio/vsprintf.c

   1 /* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
   2 #include <msvcrt/stdio.h>
   3 #include <msvcrt/stdarg.h>
   4 #include <limits.h>
   5 #include <msvcrt/internal/file.h>
   6
   7 int
   8 crt_vsprintf(char *str, const char *fmt, va_list ap)
   9 {
  10   FILE f;
  11   int len;
  12
  13   f._flag = _IOWRT|_IOSTRG|_IOBINARY;
  14   f._ptr = str;
  15   f._cnt = INT_MAX;
  16   f._file = -1;
  17   len = vfprintf(&f,fmt, ap);
  18   *f._ptr = 0;
  19   return len;
  20 }
  21
  22 /*
  23  * @implemented
  24  */
  25 int
  26 vswprintf(wchar_t *str, const wchar_t *fmt, va_list ap)
  27 {
  28   FILE f;
  29   int len;
  30
  31   f._flag = _IOWRT|_IOSTRG|_IOBINARY;
  32   f._ptr = (char*)str;
  33   f._cnt = INT_MAX;
  34   f._file = -1;
  35   len = vfwprintf(&f,fmt, ap);
  36   *(wchar_t*)f._ptr = 0;
  37   return len;
  38 }
  39
  40
  41 int
  42 crt__vsnprintf(char *str, size_t maxlen, const char *fmt, va_list ap)
  43 {
  44   FILE f;
  45   int len;
  46   f._flag = _IOWRT|_IOSTRG|_IOBINARY;
  47   f._ptr = str;
  48   f._cnt = maxlen;
  49   f._file = -1;
  50   len = vfprintf(&f,fmt, ap);
  51   // what if the buffer is full ??
  52   *f._ptr = 0;
  53   return len;
  54 }
  55
  56 int
  57 crt__vsnwprintf(wchar_t *str, size_t maxlen, const wchar_t *fmt, va_list ap)
  58 {
  59   FILE f;
  60   int len;
  61   f._flag = _IOWRT|_IOSTRG|_IOBINARY;
  62   f._ptr = (char*)str;
  63   f._cnt = maxlen;
  64   f._file = -1;
  65   len = vfwprintf(&f,fmt, ap);
  66   // what if the buffer is full ??
  67   *(wchar_t*)f._ptr = 0;
  68   return len;
  69 }
  70
  71