148 lines
4.0 KiB
C#
148 lines
4.0 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.Globalization;
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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 CodeLiteral: CodeExpression
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{
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object value;
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Type type;
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public CodeLiteral (object value)
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{
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this.value = value;
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if (value != null) type = value.GetType ();
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else type = typeof(object);
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}
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public CodeLiteral (object value, Type type)
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{
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this.value = value;
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this.type = type;
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}
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public object Value {
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get { return value; }
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}
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public override void Generate (ILGenerator gen)
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{
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object value = this.value;
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if (value == null)
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{
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gen.Emit (OpCodes.Ldnull);
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return;
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}
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if (value is Enum)
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value = Convert.ChangeType (value, (value.GetType().UnderlyingSystemType), CultureInfo.InvariantCulture);
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if (value is Type) {
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gen.Emit (OpCodes.Ldtoken, (Type)value);
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gen.Emit (OpCodes.Call, typeof(Type).GetMethod ("GetTypeFromHandle"));
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return;
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}
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switch (Type.GetTypeCode (type))
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{
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case TypeCode.String:
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gen.Emit (OpCodes.Ldstr, (string)value);
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break;
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case TypeCode.Byte:
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case TypeCode.SByte:
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case TypeCode.Int16:
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case TypeCode.UInt16:
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case TypeCode.Int32:
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case TypeCode.UInt32:
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int i = (int)value;
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switch (i)
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{
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case 0: gen.Emit (OpCodes.Ldc_I4_0); break;
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case 1: gen.Emit (OpCodes.Ldc_I4_1); break;
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case 2: gen.Emit (OpCodes.Ldc_I4_2); break;
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case 3: gen.Emit (OpCodes.Ldc_I4_3); break;
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case 4: gen.Emit (OpCodes.Ldc_I4_4); break;
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case 5: gen.Emit (OpCodes.Ldc_I4_5); break;
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case 6: gen.Emit (OpCodes.Ldc_I4_6); break;
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case 7: gen.Emit (OpCodes.Ldc_I4_7); break;
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case 8: gen.Emit (OpCodes.Ldc_I4_8); break;
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case -1: gen.Emit (OpCodes.Ldc_I4_M1); break;
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default: gen.Emit (OpCodes.Ldc_I4, i); break;
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}
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break;
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case TypeCode.Int64:
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case TypeCode.UInt64:
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gen.Emit (OpCodes.Ldc_I8, (long)value);
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break;
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case TypeCode.Single:
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gen.Emit (OpCodes.Ldc_R4, (float)value);
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break;
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case TypeCode.Double:
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gen.Emit (OpCodes.Ldc_R8, (double)value);
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break;
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case TypeCode.Boolean:
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if ((bool)value)
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gen.Emit (OpCodes.Ldc_I4_1);
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else
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gen.Emit (OpCodes.Ldc_I4_0);
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break;
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default:
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throw new InvalidOperationException ("Literal type " + value.GetType() + " not supported");
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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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if (value is string)
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cp.Write ("\"").Write (value.ToString ()).Write ("\"");
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else if (value == null)
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cp.Write ("null");
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else if (value is Type)
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cp.Write ("typeof(" + ((Type)value).Name + ")");
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else if (value is Enum)
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cp.Write (value.GetType().Name + "." + value);
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else
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cp.Write (value.ToString ());
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}
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public override Type GetResultType ()
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{
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return type;
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}
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}
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}
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#endif
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