76 lines
2.8 KiB
C#
76 lines
2.8 KiB
C#
//
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// Copyright (c) 2008-2011, Kenneth Bell
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is 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
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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using System.Collections.Generic;
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using System.IO;
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namespace DiscUtils.Streams
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{
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/// <summary>
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/// Base class for objects that can dynamically construct a stream.
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/// </summary>
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public abstract class StreamBuilder
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{
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/// <summary>
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/// Builds a new stream.
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/// </summary>
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/// <returns>The stream created by the StreamBuilder instance.</returns>
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public virtual SparseStream Build()
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{
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long totalLength;
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List<BuilderExtent> extents = FixExtents(out totalLength);
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return new BuiltStream(totalLength, extents);
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}
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/// <summary>
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/// Writes the stream contents to an existing stream.
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/// </summary>
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/// <param name="output">The stream to write to.</param>
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public void Build(Stream output)
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{
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using (Stream src = Build())
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{
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byte[] buffer = new byte[64 * 1024];
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int numRead = src.Read(buffer, 0, buffer.Length);
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while (numRead != 0)
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{
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output.Write(buffer, 0, numRead);
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numRead = src.Read(buffer, 0, buffer.Length);
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}
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}
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}
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/// <summary>
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/// Writes the stream contents to a file.
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/// </summary>
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/// <param name="outputFile">The file to write to.</param>
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public void Build(string outputFile)
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{
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using (FileStream destStream = new FileStream(outputFile, FileMode.Create, FileAccess.Write))
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{
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Build(destStream);
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}
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}
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protected abstract List<BuilderExtent> FixExtents(out long totalLength);
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}
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} |