104 lines
3.2 KiB
C#
104 lines
3.2 KiB
C#
//
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// SpecialPathElement.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) 2011 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 System;
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using Mono.CodeContracts.Static.AST;
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using Mono.CodeContracts.Static.DataStructures;
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using Mono.CodeContracts.Static.Providers;
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namespace Mono.CodeContracts.Static.Analysis.HeapAnalysis.Paths {
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class SpecialPathElement : PathElement<SpecialPathElementKind> {
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private object type;
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public SpecialPathElement (SpecialPathElementKind element, SymFunction c) : base (element, element.ToString (), c)
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{
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this.castTo = "";
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}
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public override bool IsAddressOf
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{
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get { return false; }
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}
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public override bool IsDeref
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{
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get { return this.Element == SpecialPathElementKind.Deref; }
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}
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public override bool TryGetResultType (out TypeNode resultType)
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{
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if (this.type is TypeNode) {
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resultType = (TypeNode) this.type;
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return true;
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}
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resultType = default (TypeNode);
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return false;
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}
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public override bool TrySetType (TypeNode expectedType, IMetaDataProvider metaDataProvider, out TypeNode resultType)
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{
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switch (this.Element) {
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case SpecialPathElementKind.Length:
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this.castTo = metaDataProvider.IsArray (expectedType)
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|| metaDataProvider.System_String.Equals (expectedType)
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? ""
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: "System.Array";
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resultType = metaDataProvider.System_Int32;
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return true;
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case SpecialPathElementKind.Deref:
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if (metaDataProvider.IsManagedPointer (expectedType)) {
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TypeNode type = metaDataProvider.ElementType (expectedType);
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this.type = type;
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resultType = type;
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return true;
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}
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resultType = default(TypeNode);
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return false;
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default:
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resultType = default(TypeNode);
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return false;
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}
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}
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public override Result Decode<Data, Result, Visitor, Label> (Label label, Visitor visitor, Data data)
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{
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switch (this.Element) {
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case SpecialPathElementKind.Length:
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return visitor.LoadLength (label, Dummy.Value, Dummy.Value, data);
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case SpecialPathElementKind.Deref:
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throw new NotImplementedException ();
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default:
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throw new InvalidOperationException ();
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}
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}
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}
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}
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