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Annotation of 43BSD/contrib/icon/operators/compl.c, revision 1.1

1.1     ! root        1: #include "../h/rt.h"
        !             2: 
        !             3: /*
        !             4:  * ~x - complement cset x.
        !             5:  */
        !             6: 
        !             7: compl(nargs, arg1, arg0)
        !             8: int nargs;
        !             9: struct descrip arg1, arg0;
        !            10:    {
        !            11:    DclSave
        !            12:    register int i;
        !            13:    union block *bp;
        !            14:    int *cs, csbuf[CSETSIZE];
        !            15:    extern struct b_cset *alccset();
        !            16: 
        !            17:    SetBound;
        !            18:    hneed(sizeof(struct b_cset));
        !            19: 
        !            20:    /*
        !            21:     * x must be a cset.
        !            22:     */
        !            23:    if (cvcset(&arg1, &cs, csbuf) == NULL)
        !            24:       runerr(104, &arg1);
        !            25: 
        !            26:    /*
        !            27:     * Allocate a new cset and then copy each cset word from x into
        !            28:     *  the new cset words, complementing each.
        !            29:     */
        !            30:    bp = (union block *) alccset();
        !            31:    for (i = 0; i < CSETSIZE; i++)
        !            32:        bp->cset.bits[i] = ~cs[i];
        !            33: 
        !            34:    arg0.type = D_CSET;
        !            35:    BLKLOC(arg0) = bp;
        !            36:    ClearBound;
        !            37:    }
        !            38: 
        !            39: Opblock(compl,1,"~")

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