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