74 lines
2.2 KiB
C#
74 lines
2.2 KiB
C#
//
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// EmbeddedFileSource.cs - provides a FileSource for retrieving uncompressed embedded file data
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//
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// Author:
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// Michael Becker <alcexhim@gmail.com>
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//
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// Copyright (c) 2011-2020 Mike Becker's Software
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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using System;
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using UniversalEditor.IO;
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namespace UniversalEditor.ObjectModels.FileSystem.FileSources
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{
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/// <summary>
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/// Provides a <see cref="FileSource" /> for retrieving ucompressed embedded file data.
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/// </summary>
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public class EmbeddedFileSource : FileSource
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{
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private Reader mvarReader = null;
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public Reader Reader { get { return mvarReader; } set { mvarReader = value; } }
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private long mvarOffset = 0;
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public long Offset { get { return mvarOffset; } set { mvarOffset = value; } }
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private long mvarLength = 0;
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public long Length { get { return mvarLength; } set { mvarLength = value; } }
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public override byte[] GetDataInternal(long offset, long length)
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{
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mvarReader.Seek(mvarOffset, SeekOrigin.Begin);
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byte[] sourceData = mvarReader.ReadBytes(mvarLength);
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long realLength = Math.Min(length, sourceData.Length);
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byte[] data = new byte[realLength];
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Array.Copy(sourceData, 0, data, 0, realLength);
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return data;
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}
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public override long GetLength()
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{
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return mvarLength;
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}
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public EmbeddedFileSource(Reader reader, long offset, long length, FileSourceTransformation[] transformations = null)
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{
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mvarReader = reader;
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mvarOffset = offset;
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mvarLength = length;
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if (transformations != null)
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{
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foreach (FileSourceTransformation transformation in transformations)
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{
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base.Transformations.Add(transformation);
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}
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}
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}
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}
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}
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