81 lines
2.3 KiB
C#
81 lines
2.3 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007,2009,2010 Chris Forbes, Robert Pepperell, Matthew Bowra-Dean, Paul Chote, Alli Witheford.
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* This file is part of OpenRA.
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*
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* OpenRA 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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* OpenRA 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 OpenRA. If not, see <http://www.gnu.org/licenses/>.
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*/
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#endregion
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using System.Collections.Generic;
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using System.IO;
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using System.Text;
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namespace OpenRA.FileFormats
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{
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public class PackageEntry
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{
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public readonly uint Hash;
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public readonly uint Offset;
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public readonly uint Length;
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public PackageEntry(BinaryReader r)
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{
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Hash = r.ReadUInt32();
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Offset = r.ReadUInt32();
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Length = r.ReadUInt32();
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}
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public override string ToString()
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{
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string filename;
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if (Names.TryGetValue(Hash, out filename))
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return string.Format("{0} - offset 0x{1:x8} - length 0x{2:x8}", filename, Offset, Length);
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else
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return string.Format("0x{0:x8} - offset 0x{1:x8} - length 0x{2:x8}", Hash, Offset, Length);
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}
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public static uint HashFilename(string name)
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{
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if (name.Length > 12)
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name = name.Substring(0, 12);
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name = name.ToUpperInvariant();
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if (name.Length % 4 != 0)
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name = name.PadRight(name.Length + (4 - name.Length % 4), '\0');
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MemoryStream ms = new MemoryStream(Encoding.ASCII.GetBytes(name));
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BinaryReader reader = new BinaryReader(ms);
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int len = name.Length >> 2;
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uint result = 0;
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while (len-- != 0)
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result = ((result << 1) | (result >> 31)) + reader.ReadUInt32();
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return result;
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}
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static Dictionary<uint, string> Names = new Dictionary<uint,string>();
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public static void AddStandardName(string s)
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{
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uint hash = HashFilename(s);
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Names.Add(hash, s);
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}
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public const int Size = 12;
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}
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}
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