XmlBufferedByteStreamReader.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / NetFx40 / System.ServiceModel.Channels / System / ServiceModel / Channels / XmlBufferedByteStreamReader.cs / 1305376 / XmlBufferedByteStreamReader.cs
                        

                        
                            //------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------

namespace System.ServiceModel.Channels 
{
    using System; 
    using System.IO; 
    using System.Runtime;
    using System.Xml; 

    class XmlBufferedByteStreamReader : XmlByteStreamReader
    {
        ByteStreamBufferedMessageData bufferedMessageData; 
        int offset;
        static byte[] emptyByteArray = new byte[0]; 
 
        public XmlBufferedByteStreamReader(ByteStreamBufferedMessageData bufferedMessageData, XmlDictionaryReaderQuotas quotas) : base (quotas)
        { 
            Fx.Assert(bufferedMessageData != null, "bufferedMessageData is null");
            this.bufferedMessageData = bufferedMessageData;
            this.bufferedMessageData.Open();
 
            this.offset = 0;
            this.quotas = quotas; 
            this.position = ReaderPosition.None; 
        }
 
        protected override void OnClose()
        {
            this.bufferedMessageData.Close();
            this.bufferedMessageData = null; 
            this.offset = 0;
            base.OnClose(); 
        } 

        public override int ReadContentAsBase64(byte[] buffer, int index, int count) 
        {
            EnsureInContent();
            ByteStreamMessageUtility.EnsureByteBoundaries(buffer, index, count);
 
            if (count == 0)
            { 
                return 0; 
            }
 
            int bytesToCopy = Math.Min(bufferedMessageData.Count - this.offset, count);

            if (bytesToCopy == 0)
            { 
                this.position = ReaderPosition.EndElement;
                return 0; 
            } 

            Buffer.BlockCopy(this.bufferedMessageData.Buffer, this.offset, buffer, index, bytesToCopy); 
            this.offset += bytesToCopy;

            return bytesToCopy;
        } 

        public override bool TryGetBase64ContentLength(out int length) 
        { 
            if (!this.IsClosed)
            { 
                // in ByteStream encoder, we're not concerned about individual xml nodes
                // therefore we can just return the entire segment of the buffer we're using in this reader.
                length = bufferedMessageData.Count;
                return true; 
            }
            length = -1; 
            return false; 
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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