61 lines
1.5 KiB
C#
61 lines
1.5 KiB
C#
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using System;
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using ProtoBuf.Compiler;
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using ProtoBuf.Meta;
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namespace ProtoBuf.Serializers;
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internal sealed class UriDecorator : ProtoDecoratorBase
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{
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private static readonly Type expectedType = typeof(Uri);
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public override Type ExpectedType => expectedType;
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public override bool RequiresOldValue => false;
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public override bool ReturnsValue => true;
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public UriDecorator(TypeModel model, IProtoSerializer tail)
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: base(tail)
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{
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}
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public override void Write(object value, ProtoWriter dest)
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{
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Tail.Write(((Uri)value).OriginalString, dest);
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}
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public override object Read(object value, ProtoReader source)
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{
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string text = (string)Tail.Read(null, source);
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if (text.Length != 0)
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{
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return new Uri(text, UriKind.RelativeOrAbsolute);
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}
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return null;
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}
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protected override void EmitWrite(CompilerContext ctx, Local valueFrom)
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{
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ctx.LoadValue(valueFrom);
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ctx.LoadValue(typeof(Uri).GetProperty("OriginalString"));
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Tail.EmitWrite(ctx, null);
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}
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protected override void EmitRead(CompilerContext ctx, Local valueFrom)
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{
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Tail.EmitRead(ctx, valueFrom);
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ctx.CopyValue();
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CodeLabel label = ctx.DefineLabel();
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CodeLabel label2 = ctx.DefineLabel();
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ctx.LoadValue(typeof(string).GetProperty("Length"));
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ctx.BranchIfTrue(label, @short: true);
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ctx.DiscardValue();
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ctx.LoadNullRef();
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ctx.Branch(label2, @short: true);
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ctx.MarkLabel(label);
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ctx.LoadValue(0);
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ctx.EmitCtor(ctx.MapType(typeof(Uri)), ctx.MapType(typeof(string)), ctx.MapType(typeof(UriKind)));
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ctx.MarkLabel(label2);
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}
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}
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