BSD 4 release

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

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

static char sccsid[] = "@(#)IN.c 1.1 10/29/80";

#include "h00vars.h"

IN(element, lower, upper, setptr)

       int     element;        /* element to check */
       int     lower;          /* lowest element of set */
       int     upper;          /* upper - lower of set */
       char    setptr[];       /* pointer to set */
{
       int     indx;

       if ((indx = element - lower) < 0 || indx > upper)
               return FALSE;
       if (setptr[indx / BITSPERBYTE] & (1 << (indx % BITSPERBYTE)))
               return TRUE;
       return FALSE;
}