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32 changes: 32 additions & 0 deletions
32
src/System.Reflection.Metadata/src/System/Reflection/Blob.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,32 @@ | ||
| // Copyright (c) Microsoft. All rights reserved. | ||
| // Licensed under the MIT license. See LICENSE file in the project root for full license information. | ||
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| using System; | ||
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| #if SRM | ||
| namespace System.Reflection | ||
| #else | ||
| namespace Roslyn.Reflection | ||
| #endif | ||
| { | ||
| #if SRM | ||
| public | ||
| #endif | ||
| struct Blob | ||
| { | ||
| internal readonly byte[] Buffer; | ||
| internal readonly int Start; | ||
| public int Length { get; } | ||
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| internal Blob(byte[] buffer, int start, int length) | ||
| { | ||
| Buffer = buffer; | ||
| Start = start; | ||
| Length = length; | ||
| } | ||
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| public bool IsDefault => Buffer == null; | ||
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| public ArraySegment<byte> GetBytes() => new ArraySegment<byte>(Buffer, Start, Length); | ||
| } | ||
| } |
106 changes: 106 additions & 0 deletions
106
src/System.Reflection.Metadata/src/System/Reflection/BlobBuilder.Enumerators.cs
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,106 @@ | ||
| // Copyright (c) Microsoft. All rights reserved. | ||
| // Licensed under the MIT license. See LICENSE file in the project root for full license information. | ||
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| using System.Diagnostics; | ||
| using System.Collections; | ||
| using System.Collections.Generic; | ||
| using System; | ||
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| #if SRM | ||
| namespace System.Reflection | ||
| #else | ||
| namespace Roslyn.Reflection | ||
| #endif | ||
| { | ||
| partial class BlobBuilder | ||
| { | ||
| // internal for testing | ||
| internal struct Chunks : IEnumerable<BlobBuilder>, IEnumerator<BlobBuilder>, IEnumerator | ||
| { | ||
| private readonly BlobBuilder _head; | ||
| private BlobBuilder _next; | ||
| private BlobBuilder _currentOpt; | ||
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| internal Chunks(BlobBuilder builder) | ||
| { | ||
| Debug.Assert(builder.IsHead); | ||
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| _head = builder; | ||
| _next = builder.FirstChunk; | ||
| _currentOpt = null; | ||
| } | ||
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| object IEnumerator.Current => Current; | ||
| public BlobBuilder Current => _currentOpt; | ||
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| public bool MoveNext() | ||
| { | ||
| if (_currentOpt == _head) | ||
| { | ||
| return false; | ||
| } | ||
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| if (_currentOpt == _head._nextOrPrevious) | ||
| { | ||
| _currentOpt = _head; | ||
| return true; | ||
| } | ||
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| _currentOpt = _next; | ||
| _next = _next._nextOrPrevious; | ||
| return true; | ||
| } | ||
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| public void Reset() | ||
| { | ||
| _currentOpt = null; | ||
| _next = _head.FirstChunk; | ||
| } | ||
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| void IDisposable.Dispose() { } | ||
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| // IEnumerable: | ||
| public Chunks GetEnumerator() => this; | ||
| IEnumerator<BlobBuilder> IEnumerable<BlobBuilder>.GetEnumerator() => GetEnumerator(); | ||
| IEnumerator IEnumerable.GetEnumerator() => GetEnumerator(); | ||
| } | ||
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| public struct Blobs : IEnumerable<Blob>, IEnumerator<Blob>, IEnumerator | ||
| { | ||
| private Chunks _chunks; | ||
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| internal Blobs(BlobBuilder builder) | ||
| { | ||
| _chunks = new Chunks(builder); | ||
| } | ||
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| object IEnumerator.Current => Current; | ||
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| public Blob Current | ||
| { | ||
| get | ||
| { | ||
| var current = _chunks.Current; | ||
| if (current != null) | ||
| { | ||
| return new Blob(current._buffer, 0, current.Length); | ||
| } | ||
| else | ||
| { | ||
| return default(Blob); | ||
| } | ||
| } | ||
| } | ||
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| public bool MoveNext() => _chunks.MoveNext(); | ||
| public void Reset() => _chunks.Reset(); | ||
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| void IDisposable.Dispose() { } | ||
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| // IEnumerable: | ||
| public Blobs GetEnumerator() => this; | ||
| IEnumerator<Blob> IEnumerable<Blob>.GetEnumerator() => GetEnumerator(); | ||
| IEnumerator IEnumerable.GetEnumerator() => GetEnumerator(); | ||
| } | ||
| } | ||
| } |
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