mirror of
https://github.com/SSCLI/sscli_20021101
synced 2026-06-08 12:28:57 +00:00
yallie
585 lines
23 KiB
C#
585 lines
23 KiB
C#
// ==++==
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//
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//
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// Copyright (c) 2002 Microsoft Corporation. All rights reserved.
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//
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// The use and distribution terms for this software are contained in the file
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// named license.txt, which can be found in the root of this distribution.
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// By using this software in any fashion, you are agreeing to be bound by the
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// terms of this license.
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//
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// You must not remove this notice, or any other, from this software.
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//
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//
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// ==--==
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namespace Microsoft.JScript
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{
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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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using System.Diagnostics;
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public sealed class Plus : BinaryOp{
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private Object metaData = null;
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internal Plus(Context context, AST operand1, AST operand2)
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: base(context, operand1, operand2, JSToken.Plus){
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}
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public Plus()
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: base(null, null, null, JSToken.Plus){
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}
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internal override Object Evaluate(){
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return this.EvaluatePlus(this.operand1.Evaluate(), this.operand2.Evaluate());
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}
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#if !DEBUG
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[DebuggerStepThroughAttribute]
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[DebuggerHiddenAttribute]
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#endif
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public Object EvaluatePlus(Object v1, Object v2){
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if (v1 is Int32 && v2 is Int32)
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return Plus.DoOp((Int32)v1, (Int32)v2);
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else if (v1 is Double && v2 is Double)
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return Plus.DoOp((Double)v1, (Double)v2);
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else
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return this.EvaluatePlus2(v1, v2);
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}
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#if !DEBUG
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[DebuggerStepThroughAttribute]
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[DebuggerHiddenAttribute]
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#endif
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private Object EvaluatePlus2(Object v1, Object v2){
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IConvertible ic1 = Convert.GetIConvertible(v1);
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IConvertible ic2 = Convert.GetIConvertible(v2);
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TypeCode t1 = Convert.GetTypeCode(v1, ic1);
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TypeCode t2 = Convert.GetTypeCode(v2, ic2);
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switch (t1){
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case TypeCode.Empty:
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return Plus.DoOp(v1, v2);
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case TypeCode.DBNull:
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switch (t2){
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case TypeCode.Empty:
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return Double.NaN;
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case TypeCode.DBNull:
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return 0;
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case TypeCode.Boolean:
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case TypeCode.Char:
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case TypeCode.SByte:
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case TypeCode.Byte:
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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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return ic2.ToInt32(null);
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case TypeCode.UInt32:
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return ic2.ToUInt32(null);
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case TypeCode.Int64:
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return ic2.ToInt64(null);
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case TypeCode.UInt64:
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return ic2.ToUInt64(null);
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case TypeCode.Single:
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case TypeCode.Double:
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return ic2.ToDouble(null);
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case TypeCode.Object:
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case TypeCode.Decimal:
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case TypeCode.DateTime:
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break;
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case TypeCode.String:
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return "null" + ic2.ToString(null);
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}
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break;
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case TypeCode.Char:
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{int val = ic1.ToInt32(null);
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switch (t2){
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case TypeCode.Empty:
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return Double.NaN;
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case TypeCode.DBNull:
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return val;
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case TypeCode.Boolean:
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case TypeCode.SByte:
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case TypeCode.Byte:
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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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return ((IConvertible)Plus.DoOp(val, ic2.ToInt32(null))).ToChar(null);
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case TypeCode.UInt32:
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case TypeCode.Int64:
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return ((IConvertible)Plus.DoOp((long)val, ic2.ToInt64(null))).ToChar(null);
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case TypeCode.UInt64:
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return ((IConvertible)Plus.DoOp((ulong)val, ic2.ToUInt64(null))).ToChar(null);
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case TypeCode.Single:
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case TypeCode.Double:
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checked {return (char)(int)(Convert.CheckIfDoubleIsInteger((double)Plus.DoOp((double)val, ic2.ToDouble(null))));}
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case TypeCode.Object:
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case TypeCode.Decimal:
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case TypeCode.DateTime:
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return Plus.DoOp(v1, v2);
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case TypeCode.Char:
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case TypeCode.String:
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return ic1.ToString(null) + ic2.ToString(null);
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}
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break;}
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case TypeCode.Boolean:
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case TypeCode.SByte:
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case TypeCode.Byte:
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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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{int val = ic1.ToInt32(null);
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switch (t2){
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case TypeCode.Empty:
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return Double.NaN;
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case TypeCode.DBNull:
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return val;
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case TypeCode.Char:
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return ((IConvertible)Plus.DoOp(val, ic2.ToInt32(null))).ToChar(null);
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case TypeCode.Boolean:
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case TypeCode.SByte:
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case TypeCode.Byte:
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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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return Plus.DoOp(val, ic2.ToInt32(null));
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case TypeCode.UInt32:
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case TypeCode.Int64:
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return Plus.DoOp((long)val, ic2.ToInt64(null));
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case TypeCode.UInt64:
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if (val >= 0)
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return Plus.DoOp((ulong)val, ic2.ToUInt64(null));
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else
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return Plus.DoOp((double)val, ic2.ToDouble(null));
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case TypeCode.Single:
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case TypeCode.Double:
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return Plus.DoOp((double)val, ic2.ToDouble(null));
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case TypeCode.Object:
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case TypeCode.Decimal:
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case TypeCode.DateTime:
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break;
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case TypeCode.String:
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return Convert.ToString(v1) + ic2.ToString(null);
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}
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break;}
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case TypeCode.UInt32:
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{uint val = ic1.ToUInt32(null);
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switch (t2){
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case TypeCode.Empty:
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return Double.NaN;
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case TypeCode.DBNull:
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return val;
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case TypeCode.SByte:
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case TypeCode.Byte:
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case TypeCode.Int16:
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case TypeCode.Int32:
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int val2 = ic2.ToInt32(null);
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if (val2 >= 0)
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return Plus.DoOp(val, (uint)val2);
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else
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return Plus.DoOp((long)val, (long)val2);
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case TypeCode.Int64:
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return Plus.DoOp((long)val, ic2.ToInt64(null));
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case TypeCode.Char:
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return ((IConvertible)Plus.DoOp(val, ic2.ToUInt32(null))).ToChar(null);
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case TypeCode.Boolean:
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case TypeCode.UInt16:
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case TypeCode.UInt32:
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return Plus.DoOp(val, ic2.ToUInt32(null));
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case TypeCode.UInt64:
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return Plus.DoOp((ulong)val, ic2.ToUInt64(null));
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case TypeCode.Single:
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case TypeCode.Double:
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return Plus.DoOp((double)val, ic2.ToDouble(null));
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case TypeCode.Object:
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case TypeCode.Decimal:
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case TypeCode.DateTime:
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break;
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case TypeCode.String:
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return Convert.ToString(v1) + ic2.ToString(null);
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}
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break;}
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case TypeCode.Int64:
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{long val = ic1.ToInt64(null);
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switch (t2){
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case TypeCode.Empty:
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return Double.NaN;
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case TypeCode.DBNull:
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return val;
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case TypeCode.Char:
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return ((IConvertible)Plus.DoOp(val, ic2.ToInt64(null))).ToChar(null);
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case TypeCode.Boolean:
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case TypeCode.SByte:
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case TypeCode.Byte:
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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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case TypeCode.Int64:
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return Plus.DoOp(val, ic2.ToInt64(null));
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case TypeCode.UInt64:
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if (val >= 0)
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return Plus.DoOp((ulong)val, ic2.ToUInt64(null));
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else
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return Plus.DoOp((double)val, ic2.ToDouble(null));
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case TypeCode.Single:
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case TypeCode.Double:
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return Plus.DoOp((double)val, ic2.ToDouble(null));
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case TypeCode.Object:
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case TypeCode.Decimal:
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case TypeCode.DateTime:
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break;
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case TypeCode.String:
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return Convert.ToString(v1) + ic2.ToString(null);
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}
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break;}
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case TypeCode.UInt64:
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{ulong val = ic1.ToUInt64(null);
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switch (t2){
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case TypeCode.Empty:
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return Double.NaN;
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case TypeCode.DBNull:
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return val;
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case TypeCode.SByte:
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case TypeCode.Byte:
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case TypeCode.Int16:
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case TypeCode.Int32:
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case TypeCode.Int64:
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long val2 = ic2.ToInt64(null);
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if (val2 >= 0)
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return Plus.DoOp(val, (ulong)val2);
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else
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return Plus.DoOp((double)val, (double)val2);
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case TypeCode.Char:
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return ((IConvertible)Plus.DoOp(val, ic2.ToUInt64(null))).ToChar(null);
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case TypeCode.UInt16:
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case TypeCode.Boolean:
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case TypeCode.UInt32:
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case TypeCode.UInt64:
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return Plus.DoOp(val, ic2.ToUInt64(null));
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case TypeCode.Single:
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case TypeCode.Double:
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return Plus.DoOp((double)val, ic2.ToDouble(null));
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case TypeCode.Object:
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case TypeCode.Decimal:
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case TypeCode.DateTime:
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break;
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case TypeCode.String:
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return Convert.ToString(v1) + ic2.ToString(null);
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}
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break;}
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case TypeCode.Single:
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case TypeCode.Double:{
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double d = ic1.ToDouble(null);
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switch (t2){
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case TypeCode.Empty:
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return Double.NaN;
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case TypeCode.DBNull:
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return ic1.ToDouble(null);
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case TypeCode.Char:
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return System.Convert.ToChar(System.Convert.ToInt32((d + (double)ic2.ToInt32(null))));
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case TypeCode.Boolean:
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case TypeCode.SByte:
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case TypeCode.Byte:
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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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return d + (double)ic2.ToInt32(null);
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case TypeCode.UInt32:
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case TypeCode.Int64:
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case TypeCode.UInt64:
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case TypeCode.Single:
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case TypeCode.Double:
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return d + ic2.ToDouble(null);
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case TypeCode.Object:
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case TypeCode.Decimal:
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case TypeCode.DateTime:
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break;
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case TypeCode.String:
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return new ConcatString(Convert.ToString(d), ic2.ToString(null));
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}
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break;}
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case TypeCode.Object:
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case TypeCode.Decimal:
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case TypeCode.DateTime:
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break;
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case TypeCode.String:
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switch (t2){
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case TypeCode.Object:
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break;
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case TypeCode.String:
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if (v1 is ConcatString)
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return new ConcatString((ConcatString)v1, ic2.ToString(null));
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else
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return new ConcatString(ic1.ToString(null), ic2.ToString(null));
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default:
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if (v1 is ConcatString)
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return new ConcatString((ConcatString)v1, Convert.ToString(v2));
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else
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return new ConcatString(ic1.ToString(null), Convert.ToString(v2));
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}
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break;
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}
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MethodInfo oper = this.GetOperator(v1 == null ? Typeob.Empty : v1.GetType(), v2 == null ? Typeob.Empty : v2.GetType());
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if (oper != null)
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return oper.Invoke(null, (BindingFlags)0, JSBinder.ob, new Object[]{v1, v2}, null);
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else
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return Plus.DoOp(v1, v2);
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}
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private new MethodInfo GetOperator(IReflect ir1, IReflect ir2){
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Type t1 = ir1 is Type ? (Type)ir1 : Typeob.Object;
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Type t2 = ir2 is Type ? (Type)ir2 : Typeob.Object;
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if (this.type1 == t1 && this.type2 == t2)
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return this.operatorMeth;
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if (t1 == Typeob.String || t2 == Typeob.String ||
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((Convert.IsPrimitiveNumericType(t1) || Typeob.JSObject.IsAssignableFrom(t1)) &&
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(Convert.IsPrimitiveNumericType(t2) || Typeob.JSObject.IsAssignableFrom(t2)))){
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this.operatorMeth = null;
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this.type1 = t1;
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this.type2 = t2;
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return null;
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}
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return base.GetOperator(t1, t2);
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}
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private static Object DoOp(double x, double y){
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return x + y;
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}
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private static Object DoOp(int x, int y){
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try{
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checked {return x + y;}
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}catch(OverflowException){
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return ((double)x) + (double)y;
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}
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}
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private static Object DoOp(long x, long y){
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try{
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checked {return x + y;}
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}catch(OverflowException){
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return ((double)x) + (double)y;
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}
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}
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private static Object DoOp(uint x, uint y){
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try{
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checked {return x + y;}
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}catch(OverflowException){
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return ((double)x) + (double)y;
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}
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}
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private static Object DoOp(ulong x, ulong y){
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try{
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checked {return x + y;}
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}catch(OverflowException){
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return ((double)x) + (double)y;
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}
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}
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public static Object DoOp(Object v1, Object v2){
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IConvertible ic1 = Convert.GetIConvertible(v1);
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IConvertible ic2 = Convert.GetIConvertible(v2);
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v1 = Convert.ToPrimitive(v1, PreferredType.Either, ref ic1);
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v2 = Convert.ToPrimitive(v2, PreferredType.Either, ref ic2);
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TypeCode t1 = Convert.GetTypeCode(v1, ic1);
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TypeCode t2 = Convert.GetTypeCode(v2, ic2);
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if (t1 == TypeCode.String)
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if (v1 is ConcatString)
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return new ConcatString((ConcatString)v1, Convert.ToString(v2, ic2));
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else
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return new ConcatString(ic1.ToString(null), Convert.ToString(v2, ic2));
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else if (t2 == TypeCode.String)
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return Convert.ToString(v1, ic1) + ic2.ToString(null);
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else if (t1 == TypeCode.Char && t2 == TypeCode.Char)
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return ic1.ToString(null) + ic2.ToString(null);
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else if ((t1 == TypeCode.Char && (Convert.IsPrimitiveNumericTypeCode(t2) || t2 == TypeCode.Boolean)) ||
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(t2 == TypeCode.Char && (Convert.IsPrimitiveNumericTypeCode(t1) || t1 == TypeCode.Boolean)))
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return (char)(int)(Convert.ToNumber(v1, ic1) + Convert.ToNumber(v2, ic2));
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else
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return Convert.ToNumber(v1, ic1) + Convert.ToNumber(v2, ic2);
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}
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internal override IReflect InferType(JSField inference_target){
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MethodInfo oper;
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if (this.type1 == null || inference_target != null)
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oper = this.GetOperator(this.operand1.InferType(inference_target), this.operand2.InferType(inference_target));
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else
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oper = this.GetOperator(this.type1, this.type2);
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if (oper != null){
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this.metaData = oper;
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return oper.ReturnType;
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}
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if (this.type1 == Typeob.String || this.type2 == Typeob.String)
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return Typeob.String;
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else if (this.type1 == Typeob.Char && this.type2 == Typeob.Char)
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return Typeob.String;
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else if (Convert.IsPrimitiveNumericTypeFitForDouble(this.type1)){
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if (this.type2 == Typeob.Char)
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return Typeob.Char;
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else if (Convert.IsPrimitiveNumericTypeFitForDouble(this.type2))
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return Typeob.Double;
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else
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return Typeob.Object;
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}else if (Convert.IsPrimitiveNumericTypeFitForDouble(this.type2)){
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if (this.type1 == Typeob.Char)
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return Typeob.Char;
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else if (Convert.IsPrimitiveNumericTypeFitForDouble(this.type1))
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return Typeob.Double;
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else
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return Typeob.Object;
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}else if (this.type1 == Typeob.Boolean && this.type2 == Typeob.Char)
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return Typeob.Char;
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else if (this.type1 == Typeob.Char && this.type2 == Typeob.Boolean)
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return Typeob.Char;
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else
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return Typeob.Object;
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}
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internal override void TranslateToIL(ILGenerator il, Type rtype){
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Type type = Convert.ToType(this.InferType(null));
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if (this.metaData == null){
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Type rt = Typeob.Object;
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if (rtype == Typeob.Double)
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rt = rtype;
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else if (this.type1 == Typeob.Char && this.type2 == Typeob.Char)
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rt = Typeob.String;
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else if (Convert.IsPrimitiveNumericType(rtype) && Convert.IsPromotableTo(this.type1, rtype) && Convert.IsPromotableTo(this.type2, rtype))
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rt = rtype;
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else if (this.type1 != Typeob.String && this.type2 != Typeob.String) //Both will be converted to numbers
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rt = Typeob.Double; //Won't get here unless InferType returned Typeob.Double.
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else
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rt = Typeob.String;
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if (rt == Typeob.SByte || rt == Typeob.Int16)
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rt = Typeob.Int32;
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else if (rt == Typeob.Byte || rt == Typeob.UInt16 || rt == Typeob.Char)
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rt = Typeob.UInt32;
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if (rt == Typeob.String){
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if (this.operand1 is Plus && this.type1 == rt){
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Plus op1 = (Plus)this.operand1;
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if (op1.operand1 is Plus && op1.type1 == rt){
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Plus op11 = (Plus)op1.operand1;
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if (op11.operand1 is Plus && op11.type1 == rt){
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int len = op1.TranslateToILArrayOfStrings(il, 1);
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il.Emit(OpCodes.Dup);
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ConstantWrapper.TranslateToILInt(il, len-1);
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this.operand2.TranslateToIL(il, rt);
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il.Emit(OpCodes.Stelem_Ref);
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il.Emit(OpCodes.Call, CompilerGlobals.stringConcatArrMethod);
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Convert.Emit(this, il, rt, rtype);
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return;
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}
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Plus.TranslateToStringWithSpecialCaseForNull(il, op11.operand1);
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Plus.TranslateToStringWithSpecialCaseForNull(il, op11.operand2);
|
|
Plus.TranslateToStringWithSpecialCaseForNull(il, op1.operand2);
|
|
Plus.TranslateToStringWithSpecialCaseForNull(il, this.operand2);
|
|
il.Emit(OpCodes.Call, CompilerGlobals.stringConcat4Method);
|
|
Convert.Emit(this, il, rt, rtype);
|
|
return;
|
|
}
|
|
Plus.TranslateToStringWithSpecialCaseForNull(il, op1.operand1);
|
|
Plus.TranslateToStringWithSpecialCaseForNull(il, op1.operand2);
|
|
Plus.TranslateToStringWithSpecialCaseForNull(il, this.operand2);
|
|
il.Emit(OpCodes.Call, CompilerGlobals.stringConcat3Method);
|
|
Convert.Emit(this, il, rt, rtype);
|
|
return;
|
|
}
|
|
Plus.TranslateToStringWithSpecialCaseForNull(il, this.operand1);
|
|
Plus.TranslateToStringWithSpecialCaseForNull(il, this.operand2);
|
|
il.Emit(OpCodes.Call, CompilerGlobals.stringConcat2Method);
|
|
Convert.Emit(this, il, rt, rtype);
|
|
return;
|
|
}
|
|
this.operand1.TranslateToIL(il, rt);
|
|
this.operand2.TranslateToIL(il, rt);
|
|
if (rt == Typeob.Object){
|
|
il.Emit(OpCodes.Call, CompilerGlobals.plusDoOpMethod);
|
|
}else if (rt == Typeob.Double || rt == Typeob.Single)
|
|
il.Emit(OpCodes.Add);
|
|
else if (rt == Typeob.Int32 || rt == Typeob.Int64)
|
|
il.Emit(OpCodes.Add_Ovf);
|
|
else
|
|
il.Emit(OpCodes.Add_Ovf_Un);
|
|
|
|
if (type == Typeob.Char){
|
|
Convert.Emit(this, il, rt, Typeob.Char);
|
|
Convert.Emit(this, il, Typeob.Char, rtype);
|
|
} else
|
|
Convert.Emit(this, il, rt, rtype);
|
|
return;
|
|
}
|
|
if (this.metaData is MethodInfo){
|
|
MethodInfo oper = (MethodInfo)this.metaData;
|
|
ParameterInfo[] pars = oper.GetParameters();
|
|
this.operand1.TranslateToIL(il, pars[0].ParameterType);
|
|
this.operand2.TranslateToIL(il, pars[1].ParameterType);
|
|
il.Emit(OpCodes.Call, oper);
|
|
Convert.Emit(this, il, oper.ReturnType, rtype);
|
|
return;
|
|
}
|
|
//Getting here is just too bad. We do not know until the code runs whether or not to call an overloaded operator method.
|
|
//Compile operands to objects and devolve the decision making to run time thunks
|
|
//Also get here when dealing with Int64 and UInt64. These cannot always be converted to doubles. The late-bound code checks for this.
|
|
il.Emit(OpCodes.Ldloc, (LocalBuilder)this.metaData);
|
|
this.operand1.TranslateToIL(il, Typeob.Object);
|
|
this.operand2.TranslateToIL(il, Typeob.Object);
|
|
il.Emit(OpCodes.Callvirt, CompilerGlobals.evaluatePlusMethod);
|
|
Convert.Emit(this, il, Typeob.Object, rtype);
|
|
}
|
|
|
|
private int TranslateToILArrayOfStrings(ILGenerator il, int n){
|
|
int len = n+2;
|
|
if (this.operand1 is Plus && this.type1 == Typeob.String)
|
|
len = ((Plus)this.operand1).TranslateToILArrayOfStrings(il, n+1);
|
|
else{
|
|
ConstantWrapper.TranslateToILInt(il, len);
|
|
il.Emit(OpCodes.Newarr, Typeob.String);
|
|
il.Emit(OpCodes.Dup);
|
|
il.Emit(OpCodes.Ldc_I4_0);
|
|
Plus.TranslateToStringWithSpecialCaseForNull(il, this.operand1);
|
|
il.Emit(OpCodes.Stelem_Ref);
|
|
}
|
|
il.Emit(OpCodes.Dup);
|
|
ConstantWrapper.TranslateToILInt(il, len-1-n);
|
|
Plus.TranslateToStringWithSpecialCaseForNull(il, this.operand2);
|
|
il.Emit(OpCodes.Stelem_Ref);
|
|
return len;
|
|
}
|
|
|
|
internal override void TranslateToILInitializer(ILGenerator il){
|
|
IReflect rtype = this.InferType(null);
|
|
this.operand1.TranslateToILInitializer(il);
|
|
this.operand2.TranslateToILInitializer(il);
|
|
if (rtype != Typeob.Object)
|
|
return;
|
|
this.metaData = il.DeclareLocal(typeof(Plus));
|
|
il.Emit(OpCodes.Newobj, CompilerGlobals.plusConstructor);
|
|
il.Emit(OpCodes.Stloc, (LocalBuilder)this.metaData);
|
|
}
|
|
|
|
private static void TranslateToStringWithSpecialCaseForNull(ILGenerator il, AST operand){
|
|
ConstantWrapper cw = operand as ConstantWrapper;
|
|
if (cw != null){
|
|
if (cw.value is DBNull)
|
|
il.Emit(OpCodes.Ldstr, "null");
|
|
else if (cw.value == Empty.Value)
|
|
il.Emit(OpCodes.Ldstr, "undefined");
|
|
else
|
|
cw.TranslateToIL(il, Typeob.String);
|
|
}else
|
|
operand.TranslateToIL(il, Typeob.String);
|
|
}
|
|
}
|
|
}
|