61 lines
2.0 KiB
C#
61 lines
2.0 KiB
C#
//
|
|
// StepWidening.cs
|
|
//
|
|
// Authors:
|
|
// Alexander Chebaturkin (chebaturkin@gmail.com)
|
|
//
|
|
// Copyright (C) 2011 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 System.Collections.Generic;
|
|
using Mono.CodeContracts.Static.ControlFlow;
|
|
|
|
namespace Mono.CodeContracts.Static.DataFlowAnalysis {
|
|
abstract class StepWidening<Index> : IWidenStrategy {
|
|
private readonly int N;
|
|
private readonly Dictionary<Index, int> widenCounter;
|
|
|
|
protected StepWidening (int n)
|
|
{
|
|
this.widenCounter = new Dictionary<Index, int> ();
|
|
this.N = n;
|
|
}
|
|
|
|
protected abstract Index MakeIndex (APC from, APC to);
|
|
|
|
#region Implementation of IWidenStrategy
|
|
public bool WantToWiden (APC from, APC to, bool isBackEdge)
|
|
{
|
|
if (!isBackEdge)
|
|
return false;
|
|
|
|
Index key = MakeIndex (from, to);
|
|
if (this.widenCounter.ContainsKey (key))
|
|
this.widenCounter [key] = this.widenCounter [key] + 1;
|
|
else
|
|
this.widenCounter [key] = 1;
|
|
return this.N < this.widenCounter [key];
|
|
}
|
|
#endregion
|
|
}
|
|
}
|