151 lines
3.7 KiB
C#
151 lines
3.7 KiB
C#
//
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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) Lluis Sanchez Gual, 2004
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//
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#if !FULL_AOT_RUNTIME
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using System;
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using System.Reflection;
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using System.Reflection.Emit;
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namespace Mono.CodeGeneration
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{
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public class CodeDecrement: CodeValueReference
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{
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CodeValueReference exp;
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public CodeDecrement (CodeValueReference exp)
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{
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this.exp = exp;
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}
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public override void Generate (ILGenerator gen)
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{
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exp.GenerateSet (gen, new CodeSubstractOne (exp));
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exp.Generate (gen);
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}
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public override void GenerateSet (ILGenerator gen, CodeExpression value)
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{
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exp.GenerateSet (gen, value);
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}
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public override void PrintCode (CodeWriter cp)
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{
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exp.PrintCode (cp);
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cp.Write ("--");
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}
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public override Type GetResultType ()
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{
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return exp.GetResultType();
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}
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}
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public class CodeSubstractOne: CodeExpression
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{
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CodeExpression exp;
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MethodInfo decMet;
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public CodeSubstractOne (CodeExpression exp)
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{
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this.exp = exp;
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if (!exp.IsNumber) {
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decMet = exp.GetResultType ().GetMethod ("op_Decrement");
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if (decMet == null)
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throw new InvalidOperationException ("Operator '--' cannot be applied to operand of type '" + exp.GetResultType().FullName + "'");
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}
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}
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public override void Generate (ILGenerator gen)
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{
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if (decMet != null) {
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CodeGenerationHelper.GenerateMethodCall (gen, null, decMet, exp);
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return;
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}
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exp.Generate (gen);
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Type t = exp.GetResultType ();
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switch (Type.GetTypeCode (t))
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{
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case TypeCode.Byte:
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gen.Emit (OpCodes.Ldc_I4_1);
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gen.Emit (OpCodes.Sub);
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gen.Emit (OpCodes.Conv_U1);
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break;
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case TypeCode.Double:
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gen.Emit (OpCodes.Ldc_R8, 1);
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gen.Emit (OpCodes.Sub);
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break;
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case TypeCode.Int16:
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gen.Emit (OpCodes.Ldc_I4_1);
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gen.Emit (OpCodes.Sub);
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gen.Emit (OpCodes.Conv_I2);
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break;
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case TypeCode.UInt32:
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case TypeCode.Int32:
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gen.Emit (OpCodes.Ldc_I4_1);
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gen.Emit (OpCodes.Sub);
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break;
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case TypeCode.UInt64:
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case TypeCode.Int64:
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gen.Emit (OpCodes.Ldc_I4_1);
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gen.Emit (OpCodes.Conv_U8);
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gen.Emit (OpCodes.Sub);
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break;
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case TypeCode.SByte:
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gen.Emit (OpCodes.Ldc_I4_1);
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gen.Emit (OpCodes.Sub);
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gen.Emit (OpCodes.Conv_I1);
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break;
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case TypeCode.Single:
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gen.Emit (OpCodes.Ldc_R4, 1);
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gen.Emit (OpCodes.Sub);
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break;
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case TypeCode.UInt16:
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gen.Emit (OpCodes.Ldc_I4_1);
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gen.Emit (OpCodes.Sub);
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gen.Emit (OpCodes.Conv_U2);
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break;
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}
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}
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public override void PrintCode (CodeWriter cp)
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{
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exp.PrintCode (cp);
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cp.Write ("--");
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}
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public override Type GetResultType ()
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{
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return exp.GetResultType();
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}
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}
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}
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#endif
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