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/**************************************************************************/
/* */
/* This file is part of Frama-C. */
/* */
/* Copyright (C) 2007-2010 */
/* CEA (Commissariat l'nergie atomique et aux nergies */
/* alternatives) */
/* */
/* you can redistribute it and/or modify it under the terms of the GNU */
/* Lesser General Public License as published by the Free Software */
/* Foundation, version 2.1. */
/* */
/* It 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. */
/* */
/* See the GNU Lesser General Public License version 2.1 */
/* for more details (enclosed in the file licenses/LGPLv2.1). */
/* */
/**************************************************************************/
/* $Id: builtin.c,v 1.16 2008-11-21 09:19:53 uid527 Exp $ */
int Frama_C_entropy_source;
//@ assigns Frama_C_entropy_source \from Frama_C_entropy_source;
void Frama_C_update_entropy(void);
int Frama_C_nondet(int a, int b)
{
Frama_C_update_entropy();
return Frama_C_entropy_source ? a : b;
}
void *Frama_C_nondet_ptr(void *a, void *b)
{
return (void*) Frama_C_nondet((int)a, (int)b);
}
int Frama_C_interval(int min, int max)
{
int r,aux;
Frama_C_update_entropy();
aux = Frama_C_entropy_source;
if ((aux>=min) && (aux <=max))
r = aux;
else
r = min;
return r;
}
float Frama_C_float_interval(float min, float max)
{
Frama_C_update_entropy();
return Frama_C_entropy_source ? min : max;
}
#if 0
static int ex1, ex2;
static int *ex3;
static float f;
void Frama_C_builtin_examples(void)
{
/* non-determinist choice between two integers */
ex1 = Frama_C_nondet(17, 42);
/* non-determinist choice between two pointers */
ex3 = Frama_C_nondet_ptr(&ex1, &ex2);
/* integers interval */
ex2 = Frama_C_interval(17, 42);
/* floats interval */
f = Frama_C_float_interval(1.0, 5.0);
}
#endif
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