mes/scaffold/tests/81-qsort.c

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/* -*-comment-start: "//";comment-end:""-*-
* GNU Mes --- Maxwell Equations of Software
* Copyright © 2017 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
*
* This file is part of GNU Mes.
*
* GNU Mes is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or (at
* your option) any later version.
*
* GNU Mes 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
*/
#include "30-test.i"
#include <string.h>
int
compare_int (void *a, void *b)
{
eputs ("compare: "); eputs (itoa (*(int*)a)); eputs (" <? "); eputs (itoa (*(int*)b));
eputs (" => "); eputs (itoa (*(int*)a - *(int*)b)); eputs ("\n");
return *(int*)a - *(int*)b;
}
int
test ()
{
int lst[6] = {0, 5, 4, 3, 2, -1};
qsort (lst, 6, sizeof (int), compare_int);
for (int i = 0; i < 6; i++)
{
eputs (itoa (i)); eputs (":"); eputs (itoa (lst[i])); eputs ("\n");
}
if (lst[0] != -1) return 1;
if (lst[5] != 5) return 2;
return 0;
}