120 lines
3.0 KiB
C#
120 lines
3.0 KiB
C#
//
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// TlsMultiBuffer.cs
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//
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// Author:
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// Martin Baulig <martin.baulig@xamarin.com>
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//
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// Copyright (c) 2014-2016 Xamarin Inc. (http://www.xamarin.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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using System;
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namespace Mono.Security.Interface
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{
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public class TlsMultiBuffer
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{
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MemoryChunk first, last;
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private class MemoryChunk : BufferOffsetSize
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{
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public MemoryChunk next;
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public MemoryChunk (byte[] buffer, int offset, int size)
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: base (buffer, offset, size)
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{
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}
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}
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public bool IsEmpty {
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get { return first == null; }
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}
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public bool IsSingle {
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get { return first != null && first.next == null; }
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}
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public void Add (TlsBuffer buffer)
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{
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Add (buffer.Buffer, buffer.Offset, buffer.Size);
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}
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public void Add (byte[] buffer)
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{
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Add (buffer, 0, buffer.Length);
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}
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public void Add (byte[] buffer, int offset, int size)
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{
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var chunk = new MemoryChunk (buffer, offset, size);
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if (last == null)
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first = last = chunk;
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else {
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last.next = chunk;
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last = chunk;
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}
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}
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public BufferOffsetSize[] GetBufferArray ()
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{
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int count = 0;
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for (var ptr = first; ptr != null; ptr = ptr.next)
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count++;
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var array = new BufferOffsetSize [count];
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count = 0;
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for (var ptr = first; ptr != null; ptr = ptr.next)
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array [count++] = ptr;
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return array;
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}
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public void Clear ()
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{
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for (var ptr = first; ptr != null; ptr = ptr.next)
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ptr.Dispose ();
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first = last = null;
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}
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public BufferOffsetSize GetBuffer ()
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{
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int totalSize = 0;
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for (var ptr = first; ptr != null; ptr = ptr.next)
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totalSize += ptr.Size;
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var outBuffer = new BufferOffsetSize (new byte [totalSize]);
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int offset = 0;
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for (var ptr = first; ptr != null; ptr = ptr.next) {
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Buffer.BlockCopy (ptr.Buffer, ptr.Offset, outBuffer.Buffer, offset, ptr.Size);
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offset += ptr.Size;
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}
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return outBuffer;
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}
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public BufferOffsetSize StealBuffer ()
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{
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if (IsSingle) {
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var retval = first;
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first = last = null;
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return retval;
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}
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return GetBuffer ();
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}
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}
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}
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