mes/scaffold/tests/7f-struct-pointer-arithmetic.c

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/* -*-comment-start: "//";comment-end:""-*-
* Mes --- Maxwell Equations of Software
* Copyright © 2017 Jan Nieuwenhuizen <janneke@gnu.org>
*
* This file is part of Mes.
*
* 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.
*
* 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 Mes. If not, see <http://www.gnu.org/licenses/>.
*/
#include "30-test.i"
#include <mlibc.h>
#include <stdio.h>
struct foo;
typedef struct foo foo_struct;
struct foo {
//struct foo **foo;
foo_struct **foo;
};
struct foo g_foo[2];
int
test ()
{
struct foo foo;
foo.foo = g_foo;
void *p;
void *q;
p = &foo.foo[0];
q = foo.foo;
eputs ("f:"); eputs (itoa (foo.foo)); eputs ("\n");
eputs ("p:"); eputs (itoa (p)); eputs ("\n");
eputs ("q:"); eputs (itoa (q)); eputs ("\n");
if (q != p) return 1;
p = &foo.foo[1];
q = foo.foo + 1;
eputs ("f:"); eputs (itoa (foo.foo)); eputs ("\n");
eputs ("p:"); eputs (itoa (p)); eputs ("\n");
eputs ("q:"); eputs (itoa (q)); eputs ("\n");
if (q != p) return 2;
struct foo *pfoo = &foo;
p = &pfoo->foo[1];
q = pfoo->foo + 1;
eputs ("f:"); eputs (itoa (pfoo->foo)); eputs ("\n");
eputs ("p:"); eputs (itoa (p)); eputs ("\n");
eputs ("q:"); eputs (itoa (q)); eputs ("\n");
if (q != p) return 3;
return 0;
}