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Annotation of 43BSD/contrib/icon/functions/cset.c, revision 1.1

1.1     ! root        1: #include "../h/rt.h"
        !             2: 
        !             3: /*
        !             4:  * cset(x) - convert x to cset.
        !             5:  */
        !             6: 
        !             7: Xcset(nargs, arg1, arg0)
        !             8: int nargs;
        !             9: struct descrip arg1, arg0;
        !            10:    {
        !            11:    register int i;
        !            12:    register struct b_cset *bp;
        !            13:    int *cs, csbuf[CSETSIZE];
        !            14:    extern struct b_cset *alccset();
        !            15: 
        !            16:    hneed(sizeof(struct b_cset));
        !            17: 
        !            18:    DeRef(arg1)
        !            19: 
        !            20:    if (!QUAL(arg1) && TYPE(arg1) == T_CSET)
        !            21:       /*
        !            22:        * x is already a cset, just return it.
        !            23:        */
        !            24:       arg0 = arg1;
        !            25:    else if (cvcset(&arg1, &cs, csbuf) != NULL) {
        !            26:       /*
        !            27:        * x was convertible to cset and the result resides in csbuf.  Allocate
        !            28:        *  a cset, make arg0 a descriptor for it and copy the bits from csbuf
        !            29:        *  into it.
        !            30:        */
        !            31:       arg0.type = D_CSET;
        !            32:       bp = alccset();
        !            33:       BLKLOC(arg0) =  (union block *) bp;
        !            34:       for (i = 0; i < CSETSIZE; i++)
        !            35:          bp->bits[i] = cs[i];
        !            36:       }
        !            37:    else /* Not a cset nor convertible to one. */
        !            38:       fail();
        !            39:    }
        !            40: 
        !            41: Procblock(cset,1)

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