114 lines
4.8 KiB
C#
114 lines
4.8 KiB
C#
//
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// LongToIntegerConstantEvaluator.cs
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//
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// Authors:
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// Alexander Chebaturkin (chebaturkin@gmail.com)
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//
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// Copyright (C) 2012 Alexander Chebaturkin
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using Mono.CodeContracts.Static.DataStructures;
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namespace Mono.CodeContracts.Static.Analysis.Numerical {
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class LongToIntegerConstantEvaluator : ConstantEvaluatorVisitor<long, int> {
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protected override bool VisitAdd (long left, long right, out int result)
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{
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return true.With ((int) left + (int) right, out result);
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}
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protected override bool VisitAnd (long left, long right, out int result)
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{
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return true.With ((int) left & (int) right, out result);
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}
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protected override bool VisitOr (long left, long right, out int result)
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{
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return true.With ((int) left | (int) right, out result);
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}
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protected override bool VisitXor (long left, long right, out int result)
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{
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return true.With ((int) left ^ (int) right, out result);
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}
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protected override bool VisitEqual (long left, long right, out int result)
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{
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return true.With ((int) left == (int) right ? 1 : 0, out result);
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}
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protected override bool VisitNotEqual (long left, long right, out int result)
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{
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return true.With ((int) left != (int) right ? 1 : 0, out result);
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}
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protected override bool VisitLessThan (long left, long right, out int result)
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{
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return true.With ((int) left < (int) right ? 1 : 0, out result);
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}
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protected override bool VisitLessEqualThan (long left, long right, out int result)
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{
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return true.With ((int) left <= (int) right ? 1 : 0, out result);
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}
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protected override bool VisitGreaterThan (long left, long right, out int result)
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{
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return true.With ((int) left > (int) right ? 1 : 0, out result);
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}
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protected override bool VisitGreaterEqualThan (long left, long right, out int result)
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{
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return true.With ((int) left >= (int) right ? 1 : 0, out result);
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}
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protected override bool VisitSub (long left, long right, out int result)
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{
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return true.With ((int) left - (int) right, out result);
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}
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protected override bool VisitMult (long left, long right, out int result)
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{
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return true.With ((int) left * (int) right, out result);
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}
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protected override bool VisitDiv (long left, long right, out int result)
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{
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if (right == 0)
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return false.Without (out result);
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return true.With ((int) left / (int) right, out result);
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}
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protected override bool VisitMod (long left, long right, out int result)
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{
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if (right == 0)
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return false.Without (out result);
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return true.With ((int) left % (int) right, out result);
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}
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public static bool Evaluate (ExpressionOperator op, long left, long right, out int res)
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{
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return new LongToIntegerConstantEvaluator ().VisitBinary (op, left, right, out res);
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}
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}
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} |