GARbro-mirror/Legacy/Dice/ArcRLZ.cs

119 lines
4.6 KiB
C#

//! \file ArcRLZ.cs
//! \date 2017 Dec 11
//! \brief DiceSystem resource archive.
//
// Copyright (C) 2017 by morkt
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
//
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
namespace GameRes.Formats.Dice
{
[Export(typeof(ArchiveFormat))]
public class RlzOpener : ArchiveFormat
{
public override string Tag { get { return "RLZ"; } }
public override string Description { get { return "DiceSystem resource archive"; } }
public override uint Signature { get { return 0x325A4C52; } } // 'RLZ2'
public override bool IsHierarchic { get { return false; } }
public override bool CanWrite { get { return false; } }
public override ArcFile TryOpen (ArcView file)
{
int count = file.View.ReadInt32 (4);
if (!IsSaneCount (count))
return null;
uint index_offset = 0x10;
long data_offset = index_offset + count * 0x34;
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
var name = file.View.ReadString (index_offset, 0x20);
var entry = FormatCatalog.Instance.Create<PackedEntry> (name);
entry.Size = file.View.ReadUInt32 (index_offset+0x20);
entry.UnpackedSize = file.View.ReadUInt32 (index_offset+0x24);
entry.Offset = file.View.ReadUInt32 (index_offset+0x2C) + data_offset;
if (!entry.CheckPlacement (file.MaxOffset))
return null;
entry.IsPacked = file.View.ReadInt32 (index_offset+0x28) != 0;
dir.Add (entry);
index_offset += 0x34;
}
return new ArcFile (file, this, dir);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
var input = arc.File.CreateStream (entry.Offset, entry.Size);
var pent = entry as PackedEntry;
if (null == pent || !pent.IsPacked)
return input;
using (input)
{
var output = new byte[pent.UnpackedSize];
LzUnpack (input, output);
return new BinMemoryStream (output, entry.Name);
}
}
void LzUnpack (IBinaryStream input, byte[] output)
{
var frame = new byte[0x800];
int frame_pos = 0x7EF;
int dst = 0;
int ctl_bits = 2;
while (dst < output.Length)
{
ctl_bits >>= 1;
if (1 == ctl_bits)
{
ctl_bits = input.ReadByte();
if (-1 == ctl_bits)
break;
ctl_bits |= 0x100;
}
if (0 != (ctl_bits & 1))
{
byte v = input.ReadUInt8();
output[dst++] = v;
frame[frame_pos++ & 0x7FF] = v;
}
else
{
byte lo = input.ReadUInt8();
byte hi = input.ReadUInt8();
int offset = (hi & 0xF0) << 4 | lo;
int count = (hi & 0xF) + 2;
for (int i = 0; i < count; ++i)
{
byte v = frame[(offset + i) & 0x7FF];
output[dst++] = v;
frame[frame_pos++ & 0x7FF] = v;
}
}
}
}
}
}