abs.c

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/*
 
  $Id: abs.c 1669 2019-06-26 17:24:57Z coelho $
 
  Copyright 1989-2016 MINES ParisTech
 
  This file is part of Linear/C3 Library.
 
  Linear/C3 Library is free software: 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, either version 3 of the License, or
  any later version.
 
  Linear/C3 Library 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.
 
  You should have received a copy of the GNU Lesser General Public License
  along with Linear/C3 Library.  If not, see <http://www.gnu.org/licenses/>.
 
*/
 
#ifdef HAVE_CONFIG_H
    #include "config.h"
#endif
#include <stdlib.h>
#include <stdio.h>
#include <limits.h>
 
#include "arithmetique.h"
#include "linear_assert.h"
 
/* it seems rather stupid to trap arithmetic errors on abs... FC.
 */
 
Value abs_ofl_ctrl(Value i, int ofl_ctrl)
{
    
    if ((ofl_ctrl == 1) && value_eq(i,VALUE_MIN))
        THROW(overflow_error);
        
    assert(value_ne(i,VALUE_MIN));
    return value_pos_p(i)? i: value_uminus(i);
}
 
/* int absval_ofl(int i): absolute value of i (SUN version)
 */
Value absval_ofl(Value i)
{
    return abs_ofl_ctrl(i, 1);
}
 
 
/* int absval(int i): absolute value of i (SUN version)
 */
Value absval(Value i)
{
    return abs_ofl_ctrl(i, 0);
}