BSD 4_1c_2 release

[unix-history] / usr / src / usr.lib / libpc / PRED.c

/* Copyright (c) 1979 Regents of the University of California */

static char sccsid[] = "@(#)PRED.c 1.4 6/10/81";


long
PRED(value, lower, upper)

       long    value;
       long    lower;
       long    upper;
{
       if (value == lower) {
               ERROR("Cannot take pred of first element of a range\n");
               return;
       }
       value--;
       if (value < lower || value > upper) {
               ERROR("Value of %D is out of range\n", value);
               return;
       }
       return  value;
}