c_cpp/etc/calc/have_fpos.c

   1 /*
   2  * have_fpos - Determine if have fgetpos and fsetpos functions
   3  *
   4  * Copyright (C) 1999  Landon Curt Noll
   5  *
   6  * Calc is open software; you can redistribute it and/or modify it under
   7  * the terms of the version 2.1 of the GNU Lesser General Public License
   8  * as published by the Free Software Foundation.
   9  *
  10  * Calc is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General
  13  * Public License for more details.
  14  *
  15  * A copy of version 2.1 of the GNU Lesser General Public License is
  16  * distributed with calc under the filename COPYING-LGPL.  You should have
  17  * received a copy with calc; if not, write to Free Software Foundation, Inc.
  18  * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  19  *
  20  * @(#) $Revision: 30.1 $
  21  * @(#) $Id: have_fpos.c,v 30.1 2007/03/16 11:09:46 chongo Exp $
  22  * @(#) $Source: /usr/local/src/bin/calc/RCS/have_fpos.c,v $
  23  *
  24  * Under source code control:   1994/11/05 03:19:52
  25  * File existed as early as:    1994
  26  *
  27  * chongo <was here> /\oo/\     http://www.isthe.com/chongo/
  28  * Share and enjoy!  :-)        http://www.isthe.com/chongo/tech/comp/calc/
  29  */
  30
  31 /*
  32  * If the symbol HAVE_NO_FPOS is defined, we will output nothing.
  33  * If we are able to compile this program, then we must have the
  34  * fgetpos and fsetpos functions and we will output the
  35  * appropriate have_fpos.h file body.
  36  */
  37
  38
  39 #include <stdio.h>
  40
  41 int
  42 main(void)
  43 {
  44 #if !defined(HAVE_NO_FPOS)
  45         fpos_t pos;             /* file position */
  46
  47         /* get the current position */
  48         (void) fgetpos(stdin, &pos);
  49
  50         /* set the current position */
  51         (void) fsetpos(stdin, &pos);
  52
  53         /* print a have_fpos.h body that says we have the functions */
  54         printf("#undef HAVE_FPOS\n");
  55         printf("#define HAVE_FPOS 1  /* yes */\n\n");
  56         printf("typedef fpos_t FILEPOS;\n");
  57 #endif
  58         /* exit(0); */
  59         return 0;
  60 }