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Annotation of 41BSD/lib/libpc/IN.c, revision 1.1.1.1

1.1       root        1: /* Copyright (c) 1979 Regents of the University of California */
                      2: 
                      3: static char sccsid[] = "@(#)IN.c 1.1 10/29/80";
                      4: 
                      5: #include "h00vars.h"
                      6: 
                      7: IN(element, lower, upper, setptr)
                      8: 
                      9:        int     element;        /* element to check */
                     10:        int     lower;          /* lowest element of set */
                     11:        int     upper;          /* upper - lower of set */
                     12:        char    setptr[];       /* pointer to set */
                     13: {
                     14:        int     indx;
                     15: 
                     16:        if ((indx = element - lower) < 0 || indx > upper)
                     17:                return FALSE;
                     18:        if (setptr[indx / BITSPERBYTE] & (1 << (indx % BITSPERBYTE)))
                     19:                return TRUE;
                     20:        return FALSE;
                     21: }

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