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Annotation of 43BSDTahoe/usr.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 1.2 3/7/81";
                      4: 
                      5: #include "h00vars.h"
                      6: 
                      7: bool
                      8: IN(element, lower, upper, setptr)
                      9: 
                     10:        long    element;        /* element to check */
                     11:        long    lower;          /* lowest element of set */
                     12:        long    upper;          /* upper - lower of set */
                     13:        char    setptr[];       /* pointer to set */
                     14: {
                     15:        register int    indx;
                     16: 
                     17:        if ((indx = element - lower) < 0 || indx > upper)
                     18:                return FALSE;
                     19:        if (setptr[indx >> LG2BITSBYTE] & (1 << (indx & MSKBITSBYTE)))
                     20:                return TRUE;
                     21:        return FALSE;
                     22: }

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