152 lines
3.3 KiB
C#
152 lines
3.3 KiB
C#
//
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// System.Reflection.Emit.OpCode
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//
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// Author:
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// Duncan Mak (duncan@ximian.com)
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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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// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
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//
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using System.Runtime.InteropServices;
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namespace System.Reflection.Emit {
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[ComVisible (true)]
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public struct OpCode {
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internal byte op1, op2;
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byte push, pop, size, type, args, flow;
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//
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// The order is:
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// Op1, Op2, StackBehaviourPush, StackBehaviourPop
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// Size, OpCodeType, OperandType, FlowControl
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//
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internal OpCode (int p, int q)
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{
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op1 = (byte) ((p >> 0) & 0xFF);
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op2 = (byte) ((p >> 8) & 0xFF);
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push = (byte) ((p >> 16) & 0xFF);
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pop = (byte) ((p >> 24) & 0xFF);
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size = (byte) ((q >> 0) & 0xFF);
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type = (byte) ((q >> 8) & 0xFF);
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args = (byte) ((q >> 16) & 0xFF);
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flow = (byte) ((q >> 24) & 0xFF);
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}
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public override int GetHashCode ()
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{
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return Name.GetHashCode ();
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}
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public override bool Equals (Object obj)
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{
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if (obj == null || !(obj is OpCode))
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return false;
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OpCode v = (OpCode) obj;
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return v.op1 == op1 && v.op2 == op2;
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}
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public bool Equals (OpCode obj)
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{
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return obj.op1 == op1 && obj.op2 == op2;
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}
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public override string ToString ()
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{
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return Name;
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}
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public string Name {
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get {
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if (op1 == 0xFF)
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return OpCodeNames.names [op2];
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return OpCodeNames.names [256 + op2];
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}
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}
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public int Size {
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get {
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return (int) size;
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}
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}
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public OpCodeType OpCodeType {
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get {
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return (OpCodeType) type;
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}
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}
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public OperandType OperandType {
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get {
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return (OperandType) args;
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}
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}
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public FlowControl FlowControl {
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get {
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return (FlowControl) flow;
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}
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}
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public StackBehaviour StackBehaviourPop {
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get {
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return (StackBehaviour) pop;
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}
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}
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public StackBehaviour StackBehaviourPush {
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get {
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return (StackBehaviour) push;
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}
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}
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public short Value {
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get {
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if (size == 1) {
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return op2;
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} else {
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// two byte instruction - combine
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// Some old MS betas returned (op1 << 2) | op2 here...
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return (short) ((op1 << 8) | op2);
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}
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}
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}
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public static bool operator == (OpCode a, OpCode b)
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{
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return a.op1 == b.op1 && a.op2 == b.op2;
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}
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public static bool operator != (OpCode a, OpCode b)
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{
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return a.op1 != b.op1 || a.op2 != b.op2;
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}
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}
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}
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