c_cpp/etc/calc/have_fpos_pos.c

   1 /*
   2  * have_fpos_pos - Determine if a __pos element in FILEPOS
   3  *
   4  * Copyright (C) 2000  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: 30.2 $
  21  * @(#) $Id: have_fpos_pos.c,v 30.2 2007/09/19 22:34:22 chongo Exp $
  22  * @(#) $Source: /usr/local/src/bin/calc/RCS/have_fpos_pos.c,v $
  23  *
  24  * Under source code control:   2000/12/17 01:23
  25  * File existed as early as:    2000
  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 the HAVE_FILEPOS_SCALAR is defined, we will output nothing.
  34  * If we are able to compile this program, then we must have the
  35  * __pos element in a non-scalar FILEPOS.
  36  */
  37
  38
  39 #include <stdio.h>
  40 #include "have_fpos.h"
  41 #include "have_posscl.h"
  42
  43 int
  44 main(void)
  45 {
  46 #if !defined(HAVE_NO_FPOS) && !defined(HAVE_FILEPOS_SCALAR)
  47         fpos_t pos;             /* file position */
  48
  49         /* print a __pos element in fpos_t */
  50         printf("#undef HAVE_FPOS_POS\n");
  51         printf("#define HAVE_FPOS_POS 1  /* yes */\n\n");
  52
  53         /* determine __pos element size */
  54         printf("#undef FPOS_POS_BITS\n");
  55         printf("#undef FPOS_POS_LEN\n");
  56 # if defined(FPOS_POS_BITS)
  57         printf("#define FPOS_POS_BITS %d\n", FPOS_POS_BITS);
  58         printf("#define FPOS_POS_LEN %d\n", int(FPOS_POS_BITS/8));
  59 # else
  60         printf("#define FPOS_POS_BITS %d\n", sizeof(pos.__pos)*8);
  61         printf("#define FPOS_POS_LEN %d\n", sizeof(pos.__pos));
  62 # endif
  63
  64 #else
  65         /* we have no __pos element */
  66         printf("#undef HAVE_FPOS_POS\t/* no */\n");
  67         printf("#undef FPOS_POS_BITS\n");
  68         printf("#undef FPOS_POS_LEN\n");
  69 #endif
  70         /* exit(0); */
  71         return 0;
  72 }