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Annotation of 40BSD/cmd/struct/0.list.c, revision 1.1

1.1     ! root        1: #include <stdio.h>
        !             2: #include "def.h"
        !             3: 
        !             4: struct list *consls(v,ls)              /* make list */
        !             5: VERT v;
        !             6: struct list *ls;
        !             7:        {
        !             8:        struct list *temp;
        !             9:        temp = challoc(sizeof(*temp));
        !            10:        temp->elt = v;
        !            11:        temp->nxtlist = ls;
        !            12:        return(temp);
        !            13:        }
        !            14: 
        !            15: struct list *append(v,ls)              /* return ls . v */
        !            16: VERT v;
        !            17: struct list *ls;
        !            18:        {
        !            19:        struct list *temp;
        !            20:        if (!ls) return(consls(v,0));
        !            21:        for (temp = ls; temp -> nxtlist; temp = temp->nxtlist)
        !            22:                ;
        !            23:        temp->nxtlist = consls(v,0);
        !            24:        return(ls);
        !            25:        }
        !            26: 
        !            27: 
        !            28: freelst(ls)
        !            29: struct list *ls;
        !            30:        {
        !            31:        if (!ls) return;
        !            32:        if (ls->nxtlist)
        !            33:                freelst(ls->nxtlist);
        !            34:        chfree(ls,sizeof(*ls));
        !            35:        }
        !            36: 
        !            37: 
        !            38: oneelt(ls)             /* return w if w is only elt of ls, UNDEFINED otherwise */
        !            39: struct list *ls;
        !            40:        {
        !            41:        if (!ls) return(UNDEFINED);
        !            42:        if (ls->nxtlist) return(UNDEFINED);
        !            43:        return(ls->elt);
        !            44:        }
        !            45: 
        !            46: 
        !            47: lslen(ls)              /* return number of elements in list ls */
        !            48: struct list *ls;
        !            49:        {
        !            50:        int count;
        !            51:        struct list *lp;
        !            52:        count = 0;
        !            53:        for (lp = ls; lp; lp = lp->nxtlist)
        !            54:                ++count;
        !            55:        return(count);
        !            56:        }
        !            57: 
        !            58: 
        !            59: prlst(ls)
        !            60: struct list *ls;
        !            61:        {
        !            62:        struct list *lp;
        !            63:        for (lp = ls; lp; lp = lp->nxtlist)
        !            64:                printf("%d,",lp->elt);
        !            65:        fprintf(stderr,"\n");
        !            66:        }

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