79 lines
2.7 KiB
C#
79 lines
2.7 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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namespace UniversalEditor.Compression
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{
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public abstract class CompressionModule
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{
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public abstract string Name { get; }
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public virtual bool CanCompress { get { return true; } }
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public virtual bool CanDecompress { get { return true; } }
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private bool mvarInitialized = false;
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protected virtual void InitializeInternal()
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{
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}
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private void Initialize()
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{
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if (mvarInitialized) return;
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InitializeInternal();
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mvarInitialized = true;
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}
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public byte[] Compress(byte[] inputData)
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{
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System.IO.MemoryStream inputStream = new System.IO.MemoryStream(inputData);
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System.IO.MemoryStream outputStream = new System.IO.MemoryStream();
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Compress(inputStream, outputStream);
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outputStream.Close();
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return outputStream.ToArray();
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}
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public byte[] Decompress(byte[] inputData)
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{
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System.IO.MemoryStream inputStream = new System.IO.MemoryStream(inputData);
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System.IO.MemoryStream outputStream = new System.IO.MemoryStream();
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Decompress(inputStream, outputStream);
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outputStream.Close();
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return outputStream.ToArray();
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}
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public void Decompress(System.IO.Stream inputStream, System.IO.Stream outputStream)
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{
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int inputLength = (int)inputStream.Length;
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int outputLength = (int)outputStream.Length;
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Decompress(inputStream, outputStream, inputLength, outputLength);
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}
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public void Compress(System.IO.Stream inputStream, System.IO.Stream outputStream)
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{
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Initialize();
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CompressInternal(inputStream, outputStream);
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}
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public void Decompress(System.IO.Stream inputStream, System.IO.Stream outputStream, int inputLength, int outputLength)
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{
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Initialize();
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DecompressInternal(inputStream, outputStream, inputLength, outputLength);
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}
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protected abstract void CompressInternal(System.IO.Stream inputStream, System.IO.Stream outputStream);
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protected abstract void DecompressInternal(System.IO.Stream inputStream, System.IO.Stream outputStream, int inputLength, int outputLength);
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public static CompressionModule FromKnownCompressionMethod(CompressionMethod method)
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{
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switch (method)
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{
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case CompressionMethod.Deflate: return new Modules.Deflate.DeflateCompressionModule();
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case CompressionMethod.Gzip: return new Modules.Gzip.GzipCompressionModule();
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case CompressionMethod.LZSS: return new Modules.LZSS.LZSSCompressionModule();
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case CompressionMethod.LZX: return new Modules.LZX.LZXCompressionModule();
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case CompressionMethod.XMemLZX: return new Modules.XMemLZX.XMemLZXCompressionModule();
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case CompressionMethod.Zlib: return new Modules.Zlib.ZlibCompressionModule();
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}
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throw new ArgumentException("Could not identify compression module for method " + method.ToString());
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}
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}
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}
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