/* vsnprintf.c (emx+gcc) -- Copyright (c) 1995-1998 by Eberhard Mattes */

#include <stdio.h>
#include <limits.h>
#include <emx/io.h>

int _vsnprintf (char *buffer, size_t n, const char *format, va_list arg_ptr)
{
  FILE trick;
  struct _file2 trick2;
  int result;

  if (n > INT_MAX)
    return EOF;
  trick._buffer = buffer;
  trick._ptr = buffer;
  trick._rcount = 0;
  trick._wcount = n != 0 ? (int)n - 1 : 0;
  trick._handle = -1;
  trick._flags = _IOOPEN|_IOSPECIAL|_IOBUFUSER|_IOWRT;
  trick._buf_size = (int)n;
  trick._flush = NULL;
  trick._ungetc_count = 0;
  _setdummymore (&trick, &trick2);
  result = _output (&trick, format, arg_ptr);
  if (n != 0)
    *trick._ptr = 0;
  return result;
}