source: trunk/HeuristicLab.ExtLibs/HeuristicLab.Cecil/0.9.5/Mono.Cecil-0.9.5/Mono.Cecil/Mono.Cecil.Cil/ILProcessor.cs

//
// ILProcessor.cs
//
// Author:
//   Jb Evain (jbevain@gmail.com)
//
// Copyright (c) 2008 - 2011 Jb Evain
//
// 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;

using Mono.Collections.Generic;

namespace Mono.Cecil.Cil {

  public sealed class ILProcessor {

    readonly MethodBody body;
    readonly Collection<Instruction> instructions;

    public MethodBody Body {
      get { return body; }
    }

    internal ILProcessor (MethodBody body)
    {
      this.body = body;
      this.instructions = body.Instructions;
    }

    public Instruction Create (OpCode opcode)
    {
      return Instruction.Create (opcode);
    }

    public Instruction Create (OpCode opcode, TypeReference type)
    {
      return Instruction.Create (opcode, type);
    }

    public Instruction Create (OpCode opcode, CallSite site)
    {
      return Instruction.Create (opcode, site);
    }

    public Instruction Create (OpCode opcode, MethodReference method)
    {
      return Instruction.Create (opcode, method);
    }

    public Instruction Create (OpCode opcode, FieldReference field)
    {
      return Instruction.Create (opcode, field);
    }

    public Instruction Create (OpCode opcode, string value)
    {
      return Instruction.Create (opcode, value);
    }

    public Instruction Create (OpCode opcode, sbyte value)
    {
      return Instruction.Create (opcode, value);
    }

    public Instruction Create (OpCode opcode, byte value)
    {
      if (opcode.OperandType == OperandType.ShortInlineVar)
        return Instruction.Create (opcode, body.Variables [value]);

      if (opcode.OperandType == OperandType.ShortInlineArg)
        return Instruction.Create (opcode, body.GetParameter (value));

      return Instruction.Create (opcode, value);
    }

    public Instruction Create (OpCode opcode, int value)
    {
      if (opcode.OperandType == OperandType.InlineVar)
        return Instruction.Create (opcode, body.Variables [value]);

      if (opcode.OperandType == OperandType.InlineArg)
        return Instruction.Create (opcode, body.GetParameter (value));

      return Instruction.Create (opcode, value);
    }

    public Instruction Create (OpCode opcode, long value)
    {
      return Instruction.Create (opcode, value);
    }

    public Instruction Create (OpCode opcode, float value)
    {
      return Instruction.Create (opcode, value);
    }

    public Instruction Create (OpCode opcode, double value)
    {
      return Instruction.Create (opcode, value);
    }

    public Instruction Create (OpCode opcode, Instruction target)
    {
      return Instruction.Create (opcode, target);
    }

    public Instruction Create (OpCode opcode, Instruction [] targets)
    {
      return Instruction.Create (opcode, targets);
    }

    public Instruction Create (OpCode opcode, VariableDefinition variable)
    {
      return Instruction.Create (opcode, variable);
    }

    public Instruction Create (OpCode opcode, ParameterDefinition parameter)
    {
      return Instruction.Create (opcode, parameter);
    }

    public void Emit (OpCode opcode)
    {
      Append (Create (opcode));
    }

    public void Emit (OpCode opcode, TypeReference type)
    {
      Append (Create (opcode, type));
    }

    public void Emit (OpCode opcode, MethodReference method)
    {
      Append (Create (opcode, method));
    }

    public void Emit (OpCode opcode, CallSite site)
    {
      Append (Create (opcode, site));
    }

    public void Emit (OpCode opcode, FieldReference field)
    {
      Append (Create (opcode, field));
    }

    public void Emit (OpCode opcode, string value)
    {
      Append (Create (opcode, value));
    }

    public void Emit (OpCode opcode, byte value)
    {
      Append (Create (opcode, value));
    }

    public void Emit (OpCode opcode, sbyte value)
    {
      Append (Create (opcode, value));
    }

    public void Emit (OpCode opcode, int value)
    {
      Append (Create (opcode, value));
    }

    public void Emit (OpCode opcode, long value)
    {
      Append (Create (opcode, value));
    }

    public void Emit (OpCode opcode, float value)
    {
      Append (Create (opcode, value));
    }

    public void Emit (OpCode opcode, double value)
    {
      Append (Create (opcode, value));
    }

    public void Emit (OpCode opcode, Instruction target)
    {
      Append (Create (opcode, target));
    }

    public void Emit (OpCode opcode, Instruction [] targets)
    {
      Append (Create (opcode, targets));
    }

    public void Emit (OpCode opcode, VariableDefinition variable)
    {
      Append (Create (opcode, variable));
    }

    public void Emit (OpCode opcode, ParameterDefinition parameter)
    {
      Append (Create (opcode, parameter));
    }

    public void InsertBefore (Instruction target, Instruction instruction)
    {
      if (target == null)
        throw new ArgumentNullException ("target");
      if (instruction == null)
        throw new ArgumentNullException ("instruction");

      var index = instructions.IndexOf (target);
      if (index == -1)
        throw new ArgumentOutOfRangeException ("target");

      instructions.Insert (index, instruction);
    }

    public void InsertAfter (Instruction target, Instruction instruction)
    {
      if (target == null)
        throw new ArgumentNullException ("target");
      if (instruction == null)
        throw new ArgumentNullException ("instruction");

      var index = instructions.IndexOf (target);
      if (index == -1)
        throw new ArgumentOutOfRangeException ("target");

      instructions.Insert (index + 1, instruction);
    }

    public void Append (Instruction instruction)
    {
      if (instruction == null)
        throw new ArgumentNullException ("instruction");

      instructions.Add (instruction);
    }

    public void Replace (Instruction target, Instruction instruction)
    {
      if (target == null)
        throw new ArgumentNullException ("target");
      if (instruction == null)
        throw new ArgumentNullException ("instruction");

      InsertAfter (target, instruction);
      Remove (target);
    }

    public void Remove (Instruction instruction)
    {
      if (instruction == null)
        throw new ArgumentNullException ("instruction");

      if (!instructions.Remove (instruction))
        throw new ArgumentOutOfRangeException ("instruction");
    }
  }
}