have_fgetsetpos.c

/*
 * have_fpos - Determine if have fgetpos and fsetpos functions
 *
 * Copyright (C) 1999,2021,2022  Landon Curt Noll
 *
 * Calc is open software; you can redistribute it and/or modify it under
 * the terms of the version 2.1 of the GNU Lesser General Public License
 * as published by the Free Software Foundation.
 *
 * Calc is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General
 * Public License for more details.
 *
 * A copy of version 2.1 of the GNU Lesser General Public License is
 * distributed with calc under the filename COPYING-LGPL.  You should have
 * received a copy with calc; if not, write to Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * Under source code control:   1994/11/05 03:19:52
 * File existed as early as:    1994
 *
 * chongo <was here> /\oo/\     http://www.isthe.com/chongo/
 * Share and enjoy!  :-)        http://www.isthe.com/chongo/tech/comp/calc/
 */

/*
 * If the symbol HAVE_NO_FGETSETPOS is defined, we will output nothing.
 * If we are able to compile this program, then we must have the
 * fgetpos and fsetpos functions and we will output the
 * appropriate have_fgetsetpos.h file body.
 */

#include <stdio.h>


#include "banned.h"     /* include after system header <> includes */


int
main(void)
{
#if !defined(HAVE_NO_FGETSETPOS)
        fpos_t pos;             /* file position */

        /* get the current position */
        (void) fgetpos(stdin, &pos);

        /* set the current position */
        (void) fsetpos(stdin, &pos);

        /* print a have_fgetsetpos.h body that says we have the functions */
        printf("#undef HAVE_FGETSETPOS\n");
        printf("#define HAVE_FGETSETPOS 1  /* yes */\n\n");
        printf("typedef fpos_t FILEPOS;\n");
#endif
        /* exit(0); */
        return 0;
}