76 lines
2.5 KiB
C#
76 lines
2.5 KiB
C#
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#if !NO_RUNTIME
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using System;
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using System.Reflection;
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namespace ProtoBuf.Serializers
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{
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sealed class MemberSpecifiedDecorator : ProtoDecoratorBase
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{
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public override Type ExpectedType => Tail.ExpectedType;
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public override bool RequiresOldValue => Tail.RequiresOldValue;
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public override bool ReturnsValue => Tail.ReturnsValue;
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private readonly MethodInfo getSpecified, setSpecified;
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public MemberSpecifiedDecorator(MethodInfo getSpecified, MethodInfo setSpecified, IProtoSerializer tail)
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: base(tail)
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{
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if (getSpecified == null && setSpecified == null) throw new InvalidOperationException();
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this.getSpecified = getSpecified;
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this.setSpecified = setSpecified;
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}
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public override void Write(object value, ProtoWriter dest)
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{
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if (getSpecified == null || (bool)getSpecified.Invoke(value, null))
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{
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Tail.Write(value, dest);
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}
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}
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public override object Read(object value, ProtoReader source)
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{
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object result = Tail.Read(value, source);
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if (setSpecified != null) setSpecified.Invoke(value, new object[] { true });
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return result;
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}
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#if FEAT_COMPILER
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protected override void EmitWrite(Compiler.CompilerContext ctx, Compiler.Local valueFrom)
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{
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if (getSpecified == null)
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{
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Tail.EmitWrite(ctx, valueFrom);
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return;
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}
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using (Compiler.Local loc = ctx.GetLocalWithValue(ExpectedType, valueFrom))
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{
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ctx.LoadAddress(loc, ExpectedType);
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ctx.EmitCall(getSpecified);
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Compiler.CodeLabel done = ctx.DefineLabel();
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ctx.BranchIfFalse(done, false);
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Tail.EmitWrite(ctx, loc);
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ctx.MarkLabel(done);
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}
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}
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protected override void EmitRead(Compiler.CompilerContext ctx, Compiler.Local valueFrom)
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{
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if (setSpecified == null)
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{
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Tail.EmitRead(ctx, valueFrom);
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return;
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}
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using (Compiler.Local loc = ctx.GetLocalWithValue(ExpectedType, valueFrom))
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{
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Tail.EmitRead(ctx, loc);
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ctx.LoadAddress(loc, ExpectedType);
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ctx.LoadValue(1); // true
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ctx.EmitCall(setSpecified);
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}
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}
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#endif
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}
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}
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#endif
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