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external/cecil-legacy/Mono.Cecil.Cil/Instruction.cs
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external/cecil-legacy/Mono.Cecil.Cil/Instruction.cs
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//
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// Instruction.cs
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//
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// Author:
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// Jb Evain (jbevain@gmail.com)
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//
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// Copyright (c) 2008 - 2011 Jb Evain
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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 System.Text;
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namespace Mono.Cecil.Cil {
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public sealed class Instruction {
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internal int offset;
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internal OpCode opcode;
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internal object operand;
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internal Instruction previous;
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internal Instruction next;
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SequencePoint sequence_point;
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public int Offset {
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get { return offset; }
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set { offset = value; }
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}
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public OpCode OpCode {
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get { return opcode; }
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set { opcode = value; }
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}
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public object Operand {
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get { return operand; }
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set { operand = value; }
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}
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public Instruction Previous {
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get { return previous; }
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set { previous = value; }
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}
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public Instruction Next {
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get { return next; }
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set { next = value; }
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}
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public SequencePoint SequencePoint {
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get { return sequence_point; }
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set { sequence_point = value; }
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}
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internal Instruction (int offset, OpCode opCode)
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{
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this.offset = offset;
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this.opcode = opCode;
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}
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internal Instruction (OpCode opcode, object operand)
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{
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this.opcode = opcode;
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this.operand = operand;
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}
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public int GetSize ()
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{
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int size = opcode.Size;
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switch (opcode.OperandType) {
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case OperandType.InlineSwitch:
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return size + (1 + ((Instruction []) operand).Length) * 4;
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case OperandType.InlineI8:
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case OperandType.InlineR:
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return size + 8;
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case OperandType.InlineBrTarget:
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case OperandType.InlineField:
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case OperandType.InlineI:
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case OperandType.InlineMethod:
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case OperandType.InlineString:
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case OperandType.InlineTok:
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case OperandType.InlineType:
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case OperandType.ShortInlineR:
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case OperandType.InlineSig:
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return size + 4;
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case OperandType.InlineArg:
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case OperandType.InlineVar:
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return size + 2;
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case OperandType.ShortInlineBrTarget:
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case OperandType.ShortInlineI:
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case OperandType.ShortInlineArg:
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case OperandType.ShortInlineVar:
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return size + 1;
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default:
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return size;
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}
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}
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public override string ToString ()
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{
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var instruction = new StringBuilder ();
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AppendLabel (instruction, this);
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instruction.Append (':');
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instruction.Append (' ');
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instruction.Append (opcode.Name);
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if (operand == null)
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return instruction.ToString ();
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instruction.Append (' ');
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switch (opcode.OperandType) {
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case OperandType.ShortInlineBrTarget:
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case OperandType.InlineBrTarget:
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AppendLabel (instruction, (Instruction) operand);
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break;
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case OperandType.InlineSwitch:
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var labels = (Instruction []) operand;
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for (int i = 0; i < labels.Length; i++) {
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if (i > 0)
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instruction.Append (',');
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AppendLabel (instruction, labels [i]);
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}
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break;
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case OperandType.InlineString:
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instruction.Append ('\"');
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instruction.Append (operand);
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instruction.Append ('\"');
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break;
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default:
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instruction.Append (operand);
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break;
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}
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return instruction.ToString ();
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}
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static void AppendLabel (StringBuilder builder, Instruction instruction)
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{
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builder.Append ("IL_");
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builder.Append (instruction.offset.ToString ("x4"));
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}
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public static Instruction Create (OpCode opcode)
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{
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if (opcode.OperandType != OperandType.InlineNone)
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throw new ArgumentException ("opcode");
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return new Instruction (opcode, null);
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}
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public static Instruction Create (OpCode opcode, TypeReference type)
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{
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if (type == null)
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throw new ArgumentNullException ("type");
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if (opcode.OperandType != OperandType.InlineType &&
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opcode.OperandType != OperandType.InlineTok)
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throw new ArgumentException ("opcode");
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return new Instruction (opcode, type);
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}
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public static Instruction Create (OpCode opcode, CallSite site)
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{
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if (site == null)
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throw new ArgumentNullException ("site");
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if (opcode.Code != Code.Calli)
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throw new ArgumentException ("code");
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return new Instruction (opcode, site);
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}
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public static Instruction Create (OpCode opcode, MethodReference method)
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{
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if (method == null)
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throw new ArgumentNullException ("method");
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if (opcode.OperandType != OperandType.InlineMethod &&
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opcode.OperandType != OperandType.InlineTok)
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throw new ArgumentException ("opcode");
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return new Instruction (opcode, method);
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}
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public static Instruction Create (OpCode opcode, FieldReference field)
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{
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if (field == null)
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throw new ArgumentNullException ("field");
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if (opcode.OperandType != OperandType.InlineField &&
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opcode.OperandType != OperandType.InlineTok)
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throw new ArgumentException ("opcode");
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return new Instruction (opcode, field);
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}
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public static Instruction Create (OpCode opcode, string value)
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{
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if (value == null)
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throw new ArgumentNullException ("value");
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if (opcode.OperandType != OperandType.InlineString)
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throw new ArgumentException ("opcode");
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return new Instruction (opcode, value);
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}
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public static Instruction Create (OpCode opcode, sbyte value)
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{
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if (opcode.OperandType != OperandType.ShortInlineI &&
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opcode != OpCodes.Ldc_I4_S)
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throw new ArgumentException ("opcode");
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return new Instruction (opcode, value);
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}
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public static Instruction Create (OpCode opcode, byte value)
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{
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if (opcode.OperandType != OperandType.ShortInlineI ||
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opcode == OpCodes.Ldc_I4_S)
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throw new ArgumentException ("opcode");
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return new Instruction (opcode, value);
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}
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public static Instruction Create (OpCode opcode, int value)
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{
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if (opcode.OperandType != OperandType.InlineI)
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throw new ArgumentException ("opcode");
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return new Instruction (opcode, value);
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}
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public static Instruction Create (OpCode opcode, long value)
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{
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if (opcode.OperandType != OperandType.InlineI8)
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throw new ArgumentException ("opcode");
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return new Instruction (opcode, value);
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}
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public static Instruction Create (OpCode opcode, float value)
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{
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if (opcode.OperandType != OperandType.ShortInlineR)
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throw new ArgumentException ("opcode");
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return new Instruction (opcode, value);
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}
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public static Instruction Create (OpCode opcode, double value)
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{
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if (opcode.OperandType != OperandType.InlineR)
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throw new ArgumentException ("opcode");
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return new Instruction (opcode, value);
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}
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public static Instruction Create (OpCode opcode, Instruction target)
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{
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if (target == null)
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throw new ArgumentNullException ("target");
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if (opcode.OperandType != OperandType.InlineBrTarget &&
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opcode.OperandType != OperandType.ShortInlineBrTarget)
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throw new ArgumentException ("opcode");
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return new Instruction (opcode, target);
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}
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public static Instruction Create (OpCode opcode, Instruction [] targets)
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{
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if (targets == null)
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throw new ArgumentNullException ("targets");
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if (opcode.OperandType != OperandType.InlineSwitch)
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throw new ArgumentException ("opcode");
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return new Instruction (opcode, targets);
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}
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public static Instruction Create (OpCode opcode, VariableDefinition variable)
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{
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if (variable == null)
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throw new ArgumentNullException ("variable");
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if (opcode.OperandType != OperandType.ShortInlineVar &&
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opcode.OperandType != OperandType.InlineVar)
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throw new ArgumentException ("opcode");
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return new Instruction (opcode, variable);
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}
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public static Instruction Create (OpCode opcode, ParameterDefinition parameter)
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{
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if (parameter == null)
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throw new ArgumentNullException ("parameter");
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if (opcode.OperandType != OperandType.ShortInlineArg &&
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opcode.OperandType != OperandType.InlineArg)
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throw new ArgumentException ("opcode");
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return new Instruction (opcode, parameter);
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}
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}
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}
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