www.pudn.com > boogiebot.zip > Compression.cs

/* 
 * Copyright ¸ 2005 Kele (fooleau@gmail.com) 
 * This library is free software; you can redistribute it and/or  
 * modify it under the terms of the GNU Lesser General Public  
 * License version 2.1 as published by the Free Software Foundation 
 * (the "LGPL"). 
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY 
 * OF ANY KIND, either express or implied. 
 */ 
// created on 05/07/2004 at 12:18 
// Version 1.01 - Decompress now keeps reading until it gets all expected data 
using System.IO; 
using ICSharpCode.SharpZipLib.Zip.Compression.Streams; 
 
namespace Foole.Utils 
{ 
	public class Compression 
	{ 
		// Length = decompressed length 
		public static byte[] Decompress(int Length, byte[] Data) 
		{ 
			byte[] Output = new byte[Length]; 
			Stream s = new InflaterInputStream(new MemoryStream(Data)); 
			int Offset = 0; 
			while(true) 
			{ 
				int size = s.Read(Output, Offset, Length); 
				if (size == Length) break; 
				Offset += size; 
				Length -= size; 
			} 
			return Output; 
		} 
 
		public static void Decompress(int Length, byte[] Data, string Filename) 
		{ 
			byte[] Output = Decompress(Length, Data); 
			FileStream fs = new FileStream(Filename, FileMode.Create, FileAccess.Write); 
			fs.Write(Output, 0, Length); 
 			fs.Close(); 
		} 
 
		public static byte[] Compress(byte[] Data) 
		{ 
			MemoryStream ms = new MemoryStream(); 
			Stream s = new DeflaterOutputStream(ms); 
			s.Write(Data, 0, Data.Length); 
			s.Close(); 
			return ms.ToArray(); 
		} 
	} 
}