GARbro-mirror/ArcFormats/ArcMajiro.cs

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//! \file ArcMajiro.cs
//! \date Thu Jul 31 20:27:26 2014
//! \brief Majiro engine resource archive.
//
// Copyright (C) 2014 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;
using System.IO;
using System.Linq;
using System.Text;
using System.Collections.Generic;
using System.ComponentModel.Composition;
using GameRes.Formats.Strings;
using GameRes.Utility;
namespace GameRes.Formats.Majiro
{
public class MajiroOptions : ResourceOptions
{
public uint Key { get; set; }
public int Version { get; set; }
}
[Export(typeof(ArchiveFormat))]
public class ArcOpener : ArchiveFormat
{
public override string Tag { get { return "MAJIRO"; } }
public override string Description { get { return "Majiro game engine resource archive"; } }
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public override uint Signature { get { return 0x696a614d; } } // 'Maji'
public override bool IsHierarchic { get { return false; } }
public override bool CanCreate { get { return true; } }
public ArcOpener ()
{
Extensions = new string[] { "arc" };
}
public override ArcFile TryOpen (ArcView file)
{
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if (!file.View.AsciiEqual (4, "roArcV"))
return null;
int version = file.View.ReadByte (0xA) - '0';
if (version < 1 || version > 3 || !file.View.AsciiEqual (0xB, ".000\0"))
return null;
int count = file.View.ReadInt32 (16);
uint names_offset = file.View.ReadUInt32 (20);
uint data_offset = file.View.ReadUInt32 (24);
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if (data_offset <= names_offset || data_offset >= file.MaxOffset || !IsSaneCount (count))
return null;
int table_size = count + (1 == version ? 1 : 0);
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int entry_size = 4 * (version + 1);
table_size *= entry_size;
if (table_size + 0x1c != names_offset)
return null;
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if (data_offset > file.View.Reserve (0, data_offset))
return null;
int names_size = (int)(data_offset - names_offset);
var names = new byte[names_size];
file.View.Read (names_offset, names, 0, (uint)names_size);
int names_pos = 0;
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int table_pos = 0x1c;
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int hash_size = version < 3 ? 4 : 8;
uint offset_next = file.View.ReadUInt32 (table_pos+hash_size);
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
var zero = Array.IndexOf (names, (byte)0, names_pos, names_size);
if (-1 == zero)
break;
int name_len = zero-names_pos;
string name = Encodings.cp932.GetString (names, names_pos, name_len);
names_size -= name_len+1;
names_pos = zero+1;
uint offset = offset_next;
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offset_next = file.View.ReadUInt32 (table_pos + entry_size + hash_size);
var entry = FormatCatalog.Instance.CreateEntry (name);
entry.Offset = offset;
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if (1 == version)
entry.Size = offset_next >= offset ? offset_next - offset : 0;
else
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entry.Size = file.View.ReadUInt32 (table_pos + hash_size + 4);
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table_pos += entry_size;
if (offset < data_offset || !entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
}
if (!dir.Any())
return null;
return new ArcFile (file, this, dir);
}
internal class MajiroEntry : Entry
{
public byte[] IndexName;
public uint NameHash;
}
public override void Create (Stream output, IEnumerable<Entry> list, ResourceOptions options,
EntryCallback callback)
{
int version = 1;
int file_count = list.Count();
int callback_count = 0;
var encoding = Encodings.cp932.WithFatalFallback();
if (null != callback)
callback (file_count+2, null, null);
using (var writer = new BinaryWriter (output, encoding, true))
{
if (null != callback)
callback (callback_count++, null, arcStrings.MsgWritingIndex);
string signature = string.Format ("MajiroArcV{0}.000\0", version);
writer.Write (encoding.GetBytes (signature));
writer.Write (file_count);
int index_offset = 0x1c + (file_count+1) * 8;
writer.Write (index_offset);
// calculate name hashes
var real_entry_list = new List<MajiroEntry> (file_count);
foreach (var entry in list)
{
try
{
string name = Path.GetFileName (entry.Name);
byte[] name_buf = encoding.GetBytes (name);
uint crc32 = Crc32.Compute (name_buf, 0, name_buf.Length);
var maj_entry = new MajiroEntry
{
Name = entry.Name,
IndexName = name_buf,
NameHash = crc32,
};
real_entry_list.Add (maj_entry);
}
catch (EncoderFallbackException X)
{
throw new InvalidFileName (entry.Name, arcStrings.MsgIllegalCharacters, X);
}
}
real_entry_list.Sort ((a, b) => a.NameHash.CompareTo (b.NameHash));
// write names
writer.BaseStream.Seek (index_offset, SeekOrigin.Begin);
foreach (var entry in real_entry_list)
{
writer.Write (entry.IndexName);
writer.Write ((byte)0);
}
// write files
uint start_offset = (uint)output.Position;
uint current_offset = start_offset;
foreach (var entry in real_entry_list)
{
if (null != callback)
callback (callback_count++, entry, arcStrings.MsgAddingFile);
entry.Offset = current_offset;
using (var input = File.OpenRead (entry.Name))
{
var size = input.Length;
if (size > uint.MaxValue || current_offset + size > uint.MaxValue)
throw new FileSizeException();
current_offset += (uint)size;
entry.Size = (uint)size;
input.CopyTo (output);
}
}
uint end_offset = (uint)output.Position;
if (null != callback)
callback (callback_count++, null, arcStrings.MsgUpdatingIndex);
// at last, go back to index and write hashes/offsets
writer.BaseStream.Position = 0x18;
writer.Write (start_offset);
foreach (var entry in real_entry_list)
{
writer.Write (entry.NameHash);
writer.Write ((uint)entry.Offset);
}
writer.Write ((int)0);
writer.Write (end_offset);
}
}
}
}