/* Copyright (c) 2003, Rene Luria aka herel <rene@luria.ch>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright notice,
 *     * this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *     * notice, this list of conditions and the following disclaimer in the
 *     * documentation and/or other materials provided with the distribution.
 *     * Neither the name of the author nor the names of its
 *     * contributors may be used to endorse or promote products derived from
 *     * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE. */

/* affiche à l'envers les arguments en ligne de commande */

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

static char *inverse (char *p_orig)
{
    size_t taille = strlen (p_orig);
    char *p_new, *p_res, *p = p_orig + taille;

    if ((p_res = p_new = malloc (taille + 1)))
    {
        while (p-- != p_orig)
            *(p_new++) = *p;

        *p_new = '\0';
    }
    else
    {
        perror ("malloc");
    }
    return (p_res);
}

int main (int argc, char **argv)
{
    char *p;

    while (--argc)
    {
        argv++;
        p = inverse(*argv);
        if ((p))
        {
            printf ("%20s | %s\n", *argv, p = inverse(*argv));
        }
        free (p);
    }

    return EXIT_SUCCESS;
}