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Annotation of 43BSD/contrib/icon/lib/llist.c, revision 1.1

1.1     ! root        1: #include "../h/rt.h"
        !             2: 
        !             3: /*
        !             4:  * [ ... ] - create an explicitly specified list.
        !             5:  */
        !             6: 
        !             7: llist(nargs)
        !             8: int nargs;
        !             9:    {
        !            10:    register int i;
        !            11:    register struct b_list *hp;
        !            12:    register struct b_lelem *bp;
        !            13:    extern struct b_list *alclist();
        !            14:    extern struct b_lelem *alclstb();
        !            15:    int nelem;
        !            16: 
        !            17:    SetBound;
        !            18: 
        !            19:    /*
        !            20:     * Round the number of elements in the list (as indicated by nargs)
        !            21:     *  up to LISTBLKSIZE and ensure space for the list.
        !            22:     */
        !            23:    nelem = nargs;
        !            24:    if (nelem < LISTBLKSIZE)
        !            25:       nelem = LISTBLKSIZE;
        !            26:    hneed(sizeof(struct b_list) + sizeof(struct b_lelem) +
        !            27:          nelem * sizeof(struct descrip));
        !            28: 
        !            29:    /*
        !            30:     * Allocate the list and a list block.
        !            31:     */
        !            32:    hp = alclist(nargs);
        !            33:    bp = alclstb(nelem, 0, nargs);
        !            34: 
        !            35:    /*
        !            36:     * Make the list block just allocated into the first and last blocks
        !            37:     *  for the list.
        !            38:     */
        !            39:    hp->listhead.type = hp->listtail.type = D_LELEM;
        !            40:    BLKLOC(hp->listhead) = BLKLOC(hp->listtail) = (union block *) bp;
        !            41:    /*
        !            42:     * Dereference each argument in turn and assign it to a list element.
        !            43:     */
        !            44:    for (i = 1; i <= nargs; i++) {
        !            45:       DeRef(ARG(i))
        !            46:       bp->lslots[i-1] = ARG(i);
        !            47:       }
        !            48:    /*
        !            49:     * Point arg0 at the new list and return it.
        !            50:     */
        !            51:    ARGTYPE(0) = D_LIST;
        !            52:    ARGVAL(0) = (int) hp;
        !            53:    ClearBound;
        !            54:    }

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