127 lines
3.3 KiB
C#
127 lines
3.3 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007-2011 The OpenRA Developers (see AUTHORS)
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* This file is part of OpenRA, which is free software. It is made
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* available to you under the terms of the GNU General Public License
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* as published by the Free Software Foundation. For more information,
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* see COPYING.
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*/
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#endregion
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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namespace OpenRA.FileFormats
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{
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public class InstallShieldPackage : IFolder
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{
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readonly Dictionary<uint, PackageEntry> index = new Dictionary<uint, PackageEntry>();
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readonly Stream s;
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readonly long dataStart = 255;
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int priority;
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public InstallShieldPackage(string filename, int priority)
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{
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this.priority = priority;
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s = FileSystem.Open(filename);
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// Parse package header
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BinaryReader reader = new BinaryReader(s);
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uint signature = reader.ReadUInt32();
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if (signature != 0x8C655D13)
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throw new InvalidDataException("Not an Installshield package");
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reader.ReadBytes(8);
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/*var FileCount = */reader.ReadUInt16();
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reader.ReadBytes(4);
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/*var ArchiveSize = */reader.ReadUInt32();
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reader.ReadBytes(19);
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var TOCAddress = reader.ReadInt32();
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reader.ReadBytes(4);
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var DirCount = reader.ReadUInt16();
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// Parse the directory list
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s.Seek(TOCAddress, SeekOrigin.Begin);
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BinaryReader TOCreader = new BinaryReader(s);
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for (var i = 0; i < DirCount; i++)
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ParseDirectory(TOCreader);
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}
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void ParseDirectory(BinaryReader reader)
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{
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// Parse directory header
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var FileCount = reader.ReadUInt16();
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var ChunkSize = reader.ReadUInt16();
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var NameLength = reader.ReadUInt16();
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reader.ReadChars(NameLength); //var DirName = new String(reader.ReadChars(NameLength));
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// Skip to the end of the chunk
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reader.ReadBytes(ChunkSize - NameLength - 6);
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// Parse files
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for (var i = 0; i < FileCount; i++)
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ParseFile(reader);
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}
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uint AccumulatedData = 0;
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void ParseFile(BinaryReader reader)
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{
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reader.ReadBytes(7);
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var CompressedSize = reader.ReadUInt32();
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reader.ReadBytes(12);
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var ChunkSize = reader.ReadUInt16();
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reader.ReadBytes(4);
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var NameLength = reader.ReadByte();
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var FileName = new String(reader.ReadChars(NameLength));
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var hash = PackageEntry.HashFilename(FileName);
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index.Add(hash, new PackageEntry(hash,AccumulatedData, CompressedSize));
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AccumulatedData += CompressedSize;
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// Skip to the end of the chunk
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reader.ReadBytes(ChunkSize - NameLength - 30);
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}
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public Stream GetContent(uint hash)
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{
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PackageEntry e;
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if (!index.TryGetValue(hash, out e))
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return null;
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s.Seek( dataStart + e.Offset, SeekOrigin.Begin );
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byte[] data = new byte[ e.Length ];
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s.Read( data, 0, (int)e.Length );
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return new MemoryStream(Blast.Decompress(data));
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}
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public Stream GetContent(string filename)
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{
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return GetContent(PackageEntry.HashFilename(filename));
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}
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public IEnumerable<uint> AllFileHashes()
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{
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return index.Keys;
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}
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public bool Exists(string filename)
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{
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return index.ContainsKey(PackageEntry.HashFilename(filename));
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}
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public int Priority
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{
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get { return 2000 + priority; }
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}
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public void Write(Dictionary<string, byte[]> contents)
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{
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throw new NotImplementedException("Cannot save InstallShieldPackages.");
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}
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}
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}
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