62 lines
2.0 KiB
C#
62 lines
2.0 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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#if FEAT_COMPILER
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using ProtoBuf.Compiler;
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#endif
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namespace ProtoBuf.Serializers
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{
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sealed class UriDecorator : ProtoDecoratorBase
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{
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static readonly Type expectedType = typeof(Uri);
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public UriDecorator(ProtoBuf.Meta.TypeModel model, IProtoSerializer tail) : base(tail)
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{
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}
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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 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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Helpers.DebugAssert(value == null); // not expecting incoming
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string s = (string)Tail.Read(null, source);
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return s.Length == 0 ? null : new Uri(s, UriKind.RelativeOrAbsolute);
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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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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(Compiler.CompilerContext ctx, Compiler.Local valueFrom)
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{
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Tail.EmitRead(ctx, valueFrom);
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ctx.CopyValue();
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Compiler.CodeLabel @nonEmpty = ctx.DefineLabel(), @end = ctx.DefineLabel();
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ctx.LoadValue(typeof(string).GetProperty("Length"));
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ctx.BranchIfTrue(@nonEmpty, true);
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ctx.DiscardValue();
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ctx.LoadNullRef();
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ctx.Branch(@end, true);
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ctx.MarkLabel(@nonEmpty);
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ctx.LoadValue((int)UriKind.RelativeOrAbsolute);
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ctx.EmitCtor(ctx.MapType(typeof(Uri)), ctx.MapType(typeof(string)), ctx.MapType(typeof(UriKind)));
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ctx.MarkLabel(@end);
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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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