stdio-common/scanf.c

   1 /* Copyright (C) 1991, 1995, 1996 Free Software Foundation, Inc.
   2 This file is part of the GNU C Library.
   3
   4 The GNU C Library is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU Library General Public License as
   6 published by the Free Software Foundation; either version 2 of the
   7 License, or (at your option) any later version.
   8
   9 The GNU C Library is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 Library General Public License for more details.
  13
  14 You should have received a copy of the GNU Library General Public
  15 License along with the GNU C Library; see the file COPYING.LIB.  If
  16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 #include <stdarg.h>
  20 #include <stdio.h>
  21
  22 /* The function `vscanf' is not defined in ISO C.  Therefore we must
  23    use the protected form here.  In stdio it is called `__vscanf' and
  24    in libio `_IO_vscanf'.  */
  25 #ifdef USE_IN_LIBIO
  26 # include <libioP.h>
  27 # define VSCANF _IO_vscanf
  28 #else
  29 # define VSCANF __vscanf
  30 #endif
  31
  32 /* Read formatted input from stdin according to the format string FORMAT.  */
  33 /* VARARGS1 */
  34 int
  35 scanf (const char *format, ...)
  36 {
  37   va_list arg;
  38   int done;
  39
  40   va_start (arg, format);
  41   done = VSCANF (format, arg);
  42   va_end (arg);
  43
  44   return done;
  45 }