BinaryOp


1   package gnu.ecmascript;
2   import gnu.mapping.*;
3   
4   public class BinaryOp extends Procedure2
5   {
6     int op;
7     public BinaryOp(String   name, int op)
8     {
9       setName(name);
10      this.op = op;
11    }
12  
13    public Object   apply2 (Object   arg1, Object   arg2)
14    {
15      if (op == Reserved.LESS_OP)
16        {
17      return Convert.toNumber(arg1) < Convert.toNumber(arg2)
18        ? Boolean.TRUE : Boolean.FALSE;
19        }
20      return new Double  (apply(Convert.toNumber(arg1), Convert.toNumber(arg2)));
21    }
22    
23    public double apply (double arg1, double arg2)
24    {
25      switch (op)
26        {
27        case Reserved.PLUS_OP:  return arg1+arg2;
28        case Reserved.MINUS_OP: return arg1-arg2;
29        case Reserved.TIMES_OP: return arg1*arg2;
30        case Reserved.LSHIFT_OP: return (double)((int)arg1 << ((int)arg2 & 31));
31        }
32      return Double.NaN;
33    }
34  }
35

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