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Annotation of 43BSD/contrib/icon/operators/mult.c, revision 1.1.1.1

1.1       root        1: #include "../h/rt.h"
                      2: 
                      3: /*
                      4:  * x * y - multiply x and y.
                      5:  */
                      6: 
                      7: mult(nargs, arg2, arg1, arg0)
                      8: int nargs;
                      9: struct descrip arg2, arg1, arg0;
                     10:    {
                     11:    register int t1, t2;
                     12:    union numeric n1, n2;
                     13: 
                     14:    SetBound;
                     15:    /*
                     16:     * x and y must be numeric.  Save the cvnum return values for later use.
                     17:     */
                     18:    if ((t1 = cvnum(&arg1, &n1)) == NULL)
                     19:       runerr(102, &arg1);
                     20:    if ((t2 = cvnum(&arg2, &n2)) == NULL)
                     21:       runerr(102, &arg2);
                     22: 
                     23:    if (t1 == T_LONGINT && t2 == T_LONGINT)
                     24:       /*
                     25:        * Both x and y are integers.  Perform the multiplication and
                     26:        *  and place the result in arg0 as the return value.
                     27:        */
                     28:       mkint(n1.integer * n2.integer, &arg0);
                     29:    else {
                     30:       /*
                     31:        * Either x or y is real, convert the other to a real, perform
                     32:        *  the subtraction and place the result in arg0 as the return value.
                     33:        */
                     34:       if (t1 == T_LONGINT)
                     35:          n1.real = n1.integer;
                     36:       if (t2 == T_LONGINT)
                     37:          n2.real = n2.integer;
                     38:       mkreal(n1.real * n2.real, &arg0);
                     39:       }
                     40:    ClearBound;
                     41:    }
                     42: 
                     43: Opblock(mult,2,"*")

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