mirror of
https://github.com/crskycode/GARbro.git
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265 lines
9.5 KiB
C#
265 lines
9.5 KiB
C#
//! \file ArcMK2.cs
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//! \date Thu Aug 04 05:11:20 2016
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//! \brief MAIKA resource archives.
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//
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// Copyright (C) 2016-2018 by morkt
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to
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// deal in the Software without restriction, including without limitation the
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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// sell copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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// IN THE SOFTWARE.
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//
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using System;
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using System.Collections.Generic;
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using System.ComponentModel.Composition;
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using System.IO;
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using GameRes.Compression;
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using GameRes.Utility;
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namespace GameRes.Formats.Maika
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{
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[Serializable]
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public class ScrambleScheme
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{
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public uint ScrambledSize;
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public Tuple<byte, byte>[] ScrambleMap;
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}
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internal class MkArchive : ArcFile
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{
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public readonly ScrambleScheme Scheme;
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public MkArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, ScrambleScheme scheme)
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: base (arc, impl, dir)
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{
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Scheme = scheme;
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}
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}
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[Export(typeof(ArchiveFormat))]
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public class Mk2Opener : ArchiveFormat
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{
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public override string Tag { get { return "DAT/MK2"; } }
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public override string Description { get { return "MAIKA resource archive"; } }
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public override uint Signature { get { return 0x2E324B4D; } } // 'MK2.0'
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public override bool IsHierarchic { get { return false; } }
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public override bool CanWrite { get { return false; } }
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public Mk2Opener ()
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{
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// 'MK2.0' 'BL2.0'. 'SL1.0', 'LS2.0', 'AR2.0', 'MP2.0'
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Signatures = new uint[] {
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0x2E324B4D, 0x2E324C42, 0x2E314C53, 0x2E32534C, 0x2E325241, 0x2E32504D
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};
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}
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public override ArcFile TryOpen (ArcView file)
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{
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if (!file.View.AsciiEqual (4, "0\0"))
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return null;
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int count = file.View.ReadInt32 (0x12);
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if (!IsSaneCount (count))
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return null;
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uint base_offset = file.View.ReadUInt16 (8);
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uint index_offset = file.View.ReadUInt32 (0xE);
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if (index_offset >= file.MaxOffset)
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return null;
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uint index_size = file.View.ReadUInt32 (0xA);
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if (index_size > file.View.Reserve (index_offset, index_size))
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return null;
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uint current_offset = index_offset;
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var dir = new List<Entry> (count);
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for (int i = 0; i < 512; ++i)
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{
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uint entry_offset = index_offset + file.View.ReadUInt32 (current_offset);
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int n = file.View.ReadUInt16 (current_offset+4);
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if (n > 0)
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{
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for (int j = 0; j < n; ++j)
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{
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uint offset = file.View.ReadUInt32 (entry_offset) + base_offset;
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uint size = file.View.ReadUInt32 (entry_offset+4);
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uint name_length = file.View.ReadByte (entry_offset+8);
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if (0 == name_length)
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return null;
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var name = file.View.ReadString (entry_offset+9, name_length);
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entry_offset += 9 + name_length;
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var entry = FormatCatalog.Instance.Create<Entry> (name);
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entry.Offset = offset;
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entry.Size = size;
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if (!entry.CheckPlacement (index_offset))
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return null;
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dir.Add (entry);
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}
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}
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else if (-1 == file.View.ReadInt32 (entry_offset))
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break;
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current_offset += 6;
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}
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return GetArchive (file, dir);
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}
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internal ArcFile GetArchive (ArcView file, List<Entry> dir)
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{
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if (0 == dir.Count)
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return null;
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string arc_id = file.View.ReadString (0, 5);
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ScrambleScheme scheme;
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if (!KnownSchemes.TryGetValue (arc_id, out scheme))
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scheme = DefaultScheme;
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return new MkArchive (file, this, dir, scheme);
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}
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public override Stream OpenEntry (ArcFile arc, Entry entry)
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{
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ushort signature = arc.File.View.ReadUInt16 (entry.Offset);
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// C1/D1/E1/F1
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if (0x3146 != signature && 0x3143 != signature && 0x3144 != signature && 0x3145 != signature)
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return base.OpenEntry (arc, entry);
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var mkarc = arc as MkArchive;
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ScrambleScheme scheme = mkarc != null ? mkarc.Scheme : DefaultScheme;
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uint packed_size = arc.File.View.ReadUInt32 (entry.Offset+2);
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if (packed_size < scheme.ScrambledSize || packed_size > entry.Size-10)
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return base.OpenEntry (arc, entry);
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Stream input;
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// XXX scrambling might be applicable for 'E1' signatures only
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if (scheme.ScrambledSize > 0)
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{
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var prefix = arc.File.View.ReadBytes (entry.Offset+10, scheme.ScrambledSize);
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foreach (var pair in scheme.ScrambleMap)
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{
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byte t = prefix[pair.Item1];
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prefix[pair.Item1] = prefix[pair.Item2];
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prefix[pair.Item2] = t;
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}
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input = arc.File.CreateStream (entry.Offset+10+scheme.ScrambledSize, packed_size-scheme.ScrambledSize);
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input = new PrefixStream (prefix, input);
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}
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else
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{
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input = arc.File.CreateStream (entry.Offset+10, packed_size);
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}
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input = new LzssStream (input);
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var header = new byte[5];
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input.Read (header, 0, 5);
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if (Binary.AsciiEqual (header, "BPR02"))
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return new PackedStream<Bpr02Decompressor> (input);
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if (Binary.AsciiEqual (header, "BPR01"))
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return new PackedStream<Bpr01Decompressor> (input);
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return new PrefixStream (header, input);
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}
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static readonly ScrambleScheme DefaultScheme = new ScrambleScheme {
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ScrambledSize = 14,
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ScrambleMap = new Tuple<byte,byte>[] {
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new Tuple<byte, byte> (7, 11),
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new Tuple<byte, byte> (9, 12)
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}
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};
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static readonly ScrambleScheme ArScheme = new ScrambleScheme {
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ScrambledSize = 15,
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ScrambleMap = new Tuple<byte,byte>[] {
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new Tuple<byte, byte> (7, 13),
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new Tuple<byte, byte> (9, 14)
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}
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};
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Dictionary<string, ScrambleScheme> KnownSchemes = new Dictionary<string, ScrambleScheme> {
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{ "AR2.0", ArScheme },
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{ "USG01", ArScheme },
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};
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}
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internal abstract class BprDecompressor : Decompressor
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{
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readonly byte m_rle_code;
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IBinaryStream m_input;
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protected BprDecompressor (byte rle_code)
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{
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m_rle_code = rle_code;
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}
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public override void Initialize (Stream input)
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{
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m_input = new BinaryStream (input, "");
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}
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protected override IEnumerator<int> Unpack ()
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{
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for (;;)
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{
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int ctl = m_input.ReadByte();
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if (-1 == ctl || 0xFF == ctl)
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yield break;
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int count = m_input.ReadInt32();
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if (m_rle_code == ctl)
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{
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byte b = m_input.ReadUInt8();
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while (count --> 0)
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{
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m_buffer[m_pos++] = b;
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if (0 == --m_length)
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yield return m_pos;
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}
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}
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else
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{
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while (count > 0)
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{
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int chunk = Math.Min (count, m_length);
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int read = m_input.Read (m_buffer, m_pos, chunk);
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count -= chunk;
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m_pos += chunk;
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m_length -= chunk;
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if (0 == m_length)
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yield return m_pos;
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}
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}
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}
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}
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bool m_disposed = false;
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protected override void Dispose (bool disposing)
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{
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if (!m_disposed)
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{
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if (m_input != null)
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m_input.Dispose();
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m_disposed = true;
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}
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}
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}
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internal class Bpr02Decompressor : BprDecompressor
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{
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public Bpr02Decompressor () : base (3) { }
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}
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internal class Bpr01Decompressor : BprDecompressor
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{
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public Bpr01Decompressor () : base (1) { }
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}
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}
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