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//
// TresholdDB.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 System.Collections.Generic;
using Mono.CodeContracts.Static.DataStructures;
namespace Mono.CodeContracts.Static.Analysis.Numerical {
static class ThresholdDB {
static RationalThreshold rational = new RationalThreshold (10);
public static void Reset ()
{
rational = new RationalThreshold (10);
}
public static void Add (IEnumerable<int> values)
{
foreach (var value in values) {
rational.Add (Rational.For (value));
}
}
public static Rational GetNext (Rational value)
{
return rational.GetNext (value);
}
public static Rational GetPrevious (Rational value)
{
return rational.GetPrevious (value);
}
public static bool TryGetAThreshold<TVar, TExpr> (TExpr e, IExpressionDecoder<TVar, TExpr> decoder, out List<int> thresholds)
{
var visitor = new GetThresholdVisitor<TVar, TExpr> (decoder);
if (visitor.Visit (e, Dummy.Value)) {
thresholds = new List<int> ();
foreach (var threshold in visitor.Thresholds) {
thresholds.Add (threshold - 1);
thresholds.Add (threshold);
thresholds.Add (threshold + 1);
}
return true;
}
return false.Without (out thresholds);
}
}
}
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