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

1.1     ! root        1: #include "../h/rt.h"
        !             2: #include "../h/record.h"
        !             3: 
        !             4: /*
        !             5:  * *x - return size of string or object x.
        !             6:  */
        !             7: 
        !             8: size(nargs, arg1, arg0)
        !             9: int nargs;
        !            10: struct descrip arg1, arg0;
        !            11:    {
        !            12:    DclSave
        !            13:    char sbuf[MAXSTRING];
        !            14: 
        !            15:    SetBound;
        !            16:    /*
        !            17:     * Make sure x isn't null.
        !            18:     */
        !            19:    DeRef(arg1)
        !            20:    if (NULLDESC(arg1))
        !            21:       runerr(112, &arg1);
        !            22:    if (cvstr(&arg1, sbuf) != NULL) {
        !            23:       /*
        !            24:        * If x can be converted to a string, return the length of the string
        !            25:        *  as the size of x.
        !            26:        */
        !            27:       arg0.type = D_INTEGER;
        !            28:       INTVAL(arg0) = STRLEN(arg1);
        !            29:       }
        !            30:    else {
        !            31:       /*
        !            32:        * x isn't a string.  *x for lists and tables is the current size;
        !            33:        *  *x for records is the number of fields, and *x for co-expressions
        !            34:        *  is the number of results that have been produced.
        !            35:        */
        !            36:       switch (TYPE(arg1)) {
        !            37:          case T_LIST:
        !            38:             arg0.type = D_INTEGER;
        !            39:             INTVAL(arg0) = BLKLOC(arg1)->list.cursize;
        !            40:             break;
        !            41: 
        !            42:          case T_TABLE:
        !            43:             arg0.type = D_INTEGER;
        !            44:             INTVAL(arg0) = BLKLOC(arg1)->table.cursize;
        !            45:             break;
        !            46: #ifdef SETS
        !            47:          case T_SET:
        !            48:             arg0.type = D_INTEGER;
        !            49:             INTVAL(arg0) = BLKLOC(arg1)->set.setsize;
        !            50:             break;
        !            51: #endif SETS
        !            52:          case T_RECORD:
        !            53:             arg0.type = D_INTEGER;
        !            54:             INTVAL(arg0) = BLKLOC(arg1)->record.recptr->nfields;
        !            55:             break;
        !            56: 
        !            57:          case T_ESTACK:
        !            58:             arg0.type = D_INTEGER;
        !            59:             INTVAL(arg0) = BLKLOC(arg1)->estack.nresults;
        !            60:             break;
        !            61: 
        !            62:          default:
        !            63:             /*
        !            64:              * There is no notion of size for this datatype.
        !            65:              */
        !            66:             runerr(112, &arg1);
        !            67:          }
        !            68:       }
        !            69:    ClearBound;
        !            70:    }
        !            71: 
        !            72: Opblock(size,1,"*")

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