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/**************************************************************************/
/* */
/* The Why platform for program certification */
/* Copyright (C) 2002-2008 */
/* Romain BARDOU */
/* Jean-Franois COUCHOT */
/* Mehdi DOGGUY */
/* Jean-Christophe FILLITRE */
/* Thierry HUBERT */
/* Claude MARCH */
/* Yannick MOY */
/* Christine PAULIN */
/* Yann RGIS-GIANAS */
/* Nicolas ROUSSET */
/* Xavier URBAIN */
/* */
/* This software is free software; you can redistribute it and/or */
/* modify it under the terms of the GNU General Public */
/* License version 2, as published by the Free Software Foundation. */
/* */
/* This software 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 version 2 for more details */
/* (enclosed in the file GPL). */
/* */
/**************************************************************************/
/* C tests with pointers */
/*@ requires \valid(x)
@ assigns *x
@ ensures *x == 1 && \result == 0 */
int f(int *x) {
*x = 0;
return (*x)++;
}
/*@ requires \valid(x)
@ ensures *x == 1 && \result == 1 */
int f2(int *x) {
*x = 0;
return ++(*x);
}
int* r;
/*@ requires \valid(r)
@ ensures *r == 1 */
int g() {
return f(r);
}
/*@ ensures *r == 1 */
int g2() {
r = (int*)malloc(sizeof(int));
return f(r);
}
/*@ ensures \result == 1 */
int h() { int z; z = 0; return f(&z) + z; }
int t[5];
//@ requires \valid_index(t,2) ensures \result == 1
int array1() {
int * p;
p = &t[2];
return *p++ = 1;
}
/* pointers and structures */
struct S { int x; int y; } s;
//@ requires \valid(s) ensures \result >= 1
int struct1(int n) {
int * p = &s.x;
*p = 1;
s.y = 2;
return *p;
}
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