88 lines
2.9 KiB
C#
88 lines
2.9 KiB
C#
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//------------------------------------------------------------
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//------------------------------------------------------------
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namespace System.ServiceModel.Channels
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{
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using System;
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using System.IO;
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using System.Runtime;
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using System.Xml;
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class XmlBufferedByteStreamReader : XmlByteStreamReader
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{
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ByteStreamBufferedMessageData bufferedMessageData;
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int offset;
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static byte[] emptyByteArray = new byte[0];
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public XmlBufferedByteStreamReader(ByteStreamBufferedMessageData bufferedMessageData, XmlDictionaryReaderQuotas quotas) : base (quotas)
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{
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Fx.Assert(bufferedMessageData != null, "bufferedMessageData is null");
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this.bufferedMessageData = bufferedMessageData;
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this.bufferedMessageData.Open();
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this.offset = bufferedMessageData.Buffer.Offset;
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this.quotas = quotas;
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this.position = ReaderPosition.None;
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}
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protected override void OnClose()
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{
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this.bufferedMessageData.Close();
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this.bufferedMessageData = null;
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this.offset = 0;
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base.OnClose();
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}
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public override int ReadContentAsBase64(byte[] buffer, int index, int count)
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{
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EnsureInContent();
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ByteStreamMessageUtility.EnsureByteBoundaries(buffer, index, count, true);
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if (count == 0)
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{
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return 0;
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}
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int bytesToCopy = Math.Min(bufferedMessageData.Buffer.Count - this.offset, count);
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if (bytesToCopy == 0)
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{
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this.position = ReaderPosition.EndElement;
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return 0;
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}
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Buffer.BlockCopy(this.bufferedMessageData.Buffer.Array, this.offset, buffer, index, bytesToCopy);
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this.offset += bytesToCopy;
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return bytesToCopy;
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}
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protected override byte[] OnToByteArray()
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{
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int bytesToCopy = bufferedMessageData.Buffer.Count;
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byte[] buffer = new byte[bytesToCopy];
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Buffer.BlockCopy(this.bufferedMessageData.Buffer.Array, this.bufferedMessageData.Buffer.Offset, buffer, 0, bytesToCopy);
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return buffer;
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}
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protected override Stream OnToStream()
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{
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return this.bufferedMessageData.ToStream();
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}
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public override bool TryGetBase64ContentLength(out int length)
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{
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if (!this.IsClosed)
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{
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// in ByteStream encoder, we're not concerned about individual xml nodes
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// therefore we can just return the entire segment of the buffer we're using in this reader.
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length = bufferedMessageData.Buffer.Count;
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return true;
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}
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length = -1;
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return false;
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}
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}
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}
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