GARbro-mirror/ArcFormats/WildBug/ArcWBP.cs

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//! \file ArcWBP.cs
//! \date Thu Jul 09 17:02:03 2015
//! \brief Wild Bug's resource archive format.
//
// Copyright (C) 2015 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.
//
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using System;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using System.IO;
namespace GameRes.Formats.WildBug
{
[Export(typeof(ArchiveFormat))]
public class WbpOpener : ArchiveFormat
{
public override string Tag { get { return "WBP"; } }
public override string Description { get { return "Wild Bug's engine resource archive"; } }
public override uint Signature { get { return 0x46435241; } } // 'ARCF'
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public override bool IsHierarchic { get { return true; } }
public override bool CanWrite { get { return false; } }
public override ArcFile TryOpen (ArcView file)
{
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if (!file.View.AsciiEqual (0, "ARCFORM") ||
!file.View.AsciiEqual (8, " WBUG "))
return null;
int version = file.View.ReadByte (7) - '0';
if (version < 2 || version > 4)
return null;
int count = file.View.ReadInt32 (0x10);
if (!IsSaneCount (count))
return null;
uint index_offset = file.View.ReadUInt32 (0x14);
uint index_size = file.View.ReadUInt32 (0x18);
uint data_offset = file.View.ReadUInt32 (0x1C);
if (data_offset < index_offset || data_offset > file.MaxOffset)
return null;
if (index_size > file.View.Reserve (index_offset, index_size))
return null;
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if (4 == version)
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return OpenV4 (file, count, index_offset, index_size);
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else
return OpenV3 (file, count, index_offset);
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}
ArcFile OpenV3 (ArcView file, int count, uint index_offset)
{
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
uint name_length = file.View.ReadByte (index_offset+9);
string name = file.View.ReadString (index_offset+0x14, name_length);
if (0 == name.Length)
return null;
var entry = FormatCatalog.Instance.Create<Entry> (name);
entry.Offset = file.View.ReadUInt32 (index_offset);
entry.Size = file.View.ReadUInt32 (index_offset+4);
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
index_offset += name_length + 0x14;
}
return new ArcFile (file, this, dir);
}
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ArcFile OpenV4 (ArcView file, int count, uint index_offset, uint index_size)
{
var buffer = new byte[0x400];
var dir_names = new uint[0x100];
file.View.Read (0x24, buffer, 0, 0x400);
Buffer.BlockCopy (buffer, 0, dir_names, 0, 0x400);
var res_names = new uint[0x100];
file.View.Read (0x424, buffer, 0, 0x400);
Buffer.BlockCopy (buffer, 0, res_names, 0, 0x400);
var dir_table = new Dictionary<int, string>();
for (int i = 0; i < 0x100; ++i)
{
if (0 == dir_names[i])
continue;
uint dir_offset = dir_names[i];
for (;;)
{
byte hash = file.View.ReadByte (dir_offset);
if (hash != i)
break;
byte name_length = file.View.ReadByte (dir_offset+1);
int dir_id = file.View.ReadUInt16 (dir_offset+2);
file.View.Read (dir_offset + 4, buffer, 0, name_length);
byte checksum = 0;
for (int j = 0; j < name_length; ++j)
checksum += buffer[j];
if (hash != checksum)
return null;
dir_table[dir_id] = Encodings.cp932.GetString (buffer, 0, name_length).TrimStart ('\\');
dir_offset += 5u + name_length;
}
}
uint index_end = index_offset + index_size;
var dir = new List<Entry> (count);
for (int i = 0; i < 0x100; ++i)
{
if (0 == res_names[i])
continue;
uint res_offset = res_names[i];
while (res_offset < index_end)
{
byte hash = file.View.ReadByte (res_offset);
if (hash != i)
break;
byte name_length = file.View.ReadByte (res_offset+1);
int dir_id = file.View.ReadUInt16 (res_offset+2);
file.View.Read (res_offset+0x14, buffer, 0, name_length);
byte checksum = 0;
for (int j = 0; j < name_length; ++j)
checksum += buffer[j];
if (hash != checksum)
return null;
var dir_name = dir_table[dir_id];
var name = dir_table[dir_id] + Encodings.cp932.GetString (buffer, 0, name_length);
var entry = FormatCatalog.Instance.Create<Entry> (name);
entry.Offset = file.View.ReadUInt32 (res_offset+4);
entry.Size = file.View.ReadUInt32 (res_offset+8);
res_offset += (0x18u + name_length) & ~3u;
dir.Add (entry);
}
}
return new ArcFile (file, this, dir);
}
}
}