2 // LongToIntegerConstantEvaluator.cs
5 // Alexander Chebaturkin (chebaturkin@gmail.com)
7 // Copyright (C) 2012 Alexander Chebaturkin
9 // Permission is hereby granted, free of charge, to any person obtaining
10 // a copy of this software and associated documentation files (the
11 // "Software"), to deal in the Software without restriction, including
12 // without limitation the rights to use, copy, modify, merge, publish,
13 // distribute, sublicense, and/or sell copies of the Software, and to
14 // permit persons to whom the Software is furnished to do so, subject to
15 // the following conditions:
17 // The above copyright notice and this permission notice shall be
18 // included in all copies or substantial portions of the Software.
20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
29 using Mono.CodeContracts.Static.DataStructures;
31 namespace Mono.CodeContracts.Static.Analysis.Numerical {
32 class LongToIntegerConstantEvaluator : ConstantEvaluatorVisitor<long, int> {
33 protected override bool VisitAdd (long left, long right, out int result)
35 return true.With ((int) left + (int) right, out result);
38 protected override bool VisitAnd (long left, long right, out int result)
40 return true.With ((int) left & (int) right, out result);
43 protected override bool VisitOr (long left, long right, out int result)
45 return true.With ((int) left | (int) right, out result);
48 protected override bool VisitXor (long left, long right, out int result)
50 return true.With ((int) left ^ (int) right, out result);
53 protected override bool VisitEqual (long left, long right, out int result)
55 return true.With ((int) left == (int) right ? 1 : 0, out result);
58 protected override bool VisitNotEqual (long left, long right, out int result)
60 return true.With ((int) left != (int) right ? 1 : 0, out result);
63 protected override bool VisitLessThan (long left, long right, out int result)
65 return true.With ((int) left < (int) right ? 1 : 0, out result);
68 protected override bool VisitLessEqualThan (long left, long right, out int result)
70 return true.With ((int) left <= (int) right ? 1 : 0, out result);
73 protected override bool VisitGreaterThan (long left, long right, out int result)
75 return true.With ((int) left > (int) right ? 1 : 0, out result);
78 protected override bool VisitGreaterEqualThan (long left, long right, out int result)
80 return true.With ((int) left >= (int) right ? 1 : 0, out result);
83 protected override bool VisitSub (long left, long right, out int result)
85 return true.With ((int) left - (int) right, out result);
88 protected override bool VisitMult (long left, long right, out int result)
90 return true.With ((int) left * (int) right, out result);
93 protected override bool VisitDiv (long left, long right, out int result)
96 return false.Without (out result);
98 return true.With ((int) left / (int) right, out result);
101 protected override bool VisitMod (long left, long right, out int result)
104 return false.Without (out result);
106 return true.With ((int) left % (int) right, out result);
109 public static bool Evaluate (ExpressionOperator op, long left, long right, out int res)
111 return new LongToIntegerConstantEvaluator ().VisitBinary (op, left, right, out res);