79 строки
2.9 KiB
C#
79 строки
2.9 KiB
C#
// Copyright (c) 2011 AlphaSierraPapa for the SharpDevelop Team
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy of this
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// software and associated documentation files (the "Software"), to deal in the Software
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// without restriction, including without limitation the rights to use, copy, modify, merge,
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// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
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// to whom the Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all copies or
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// substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
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// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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using System;
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namespace ICSharpCode.Decompiler.FlowAnalysis
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{
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/// <summary>
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/// Describes the type of a control flow egde.
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/// </summary>
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public enum JumpType
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{
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/// <summary>
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/// A regular control flow edge.
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/// </summary>
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Normal,
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/// <summary>
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/// Jump to exception handler (an exception occurred)
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/// </summary>
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JumpToExceptionHandler,
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/// <summary>
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/// Jump from try block to leave target:
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/// This is not a real jump, as the finally handler is executed first!
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/// </summary>
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LeaveTry,
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/// <summary>
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/// Jump at endfinally (to any of the potential leave targets).
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/// For any leave-instruction, control flow enters the finally block - the edge to the leave target (LeaveTry) is not a real control flow edge.
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/// EndFinally edges are inserted at the end of the finally block, jumping to any of the targets of the leave instruction.
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/// This edge type is only used when copying of finally blocks is disabled (with copying, a normal deterministic edge is used at each copy of the endfinally node).
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/// </summary>
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EndFinally
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}
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/// <summary>
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/// Represents an edge in the control flow graph, pointing from Source to Target.
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/// </summary>
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public sealed class ControlFlowEdge
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{
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public readonly ControlFlowNode Source;
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public readonly ControlFlowNode Target;
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public readonly JumpType Type;
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public ControlFlowEdge(ControlFlowNode source, ControlFlowNode target, JumpType type)
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{
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Source = source;
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Target = target;
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Type = type;
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}
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public override string ToString()
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{
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switch (Type) {
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case JumpType.Normal:
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return "#" + Target.BlockIndex;
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case JumpType.JumpToExceptionHandler:
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return "e:#" + Target.BlockIndex;
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default:
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return Type.ToString() + ":#" + Target.BlockIndex;
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}
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}
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}
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}
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