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added alternative version of the TACTICS_ARC_FILE.

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morkt 2015-08-03 22:30:22 +04:00
parent 1aa82884bd
commit 54d8d1cd86
2 changed files with 127 additions and 38 deletions
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163
ArcFormats/ArcTactics.cs
View File

@ -56,55 +56,29 @@ namespace GameRes.Formats.Tactics
public ArcOpener ()
{
Extensions = new string[] { "arc" };
Extensions = new string[] { "arc", "adf" };
}
public override ArcFile TryOpen (ArcView file)
{
if (!file.View.AsciiEqual (4, "ICS_ARC_FILE"))
return null;
uint packed_size = file.View.ReadUInt32 (0x10);
uint unpacked_size = file.View.ReadUInt32 (0x14);
int count = file.View.ReadInt32 (0x18);
if (!IsSaneCount (count))
var reader = new IndexReader (file);
var dir = reader.ReadIndex();
if (null == dir)
return null;
var index = new byte[unpacked_size];
using (var input = file.CreateStream (0x20, packed_size))
using (var xored = new CryptoStream (input, new NotTransform(), CryptoStreamMode.Read))
using (var lzss = new LzssStream (xored))
lzss.Read (index, 0, index.Length);
int index_offset = Array.IndexOf (index, (byte)0);
if (-1 == index_offset || 0 == index_offset)
return null;
var password = index.Take (index_offset++).ToArray();
long base_offset = 0x20 + packed_size;
var dir = new List<Entry> (count);
for (int i = 0; i < count; ++i)
{
var entry = new PackedEntry();
entry.Offset = LittleEndian.ToUInt32 (index, index_offset) + base_offset;
entry.Size = LittleEndian.ToUInt32 (index, index_offset + 4);
entry.UnpackedSize = LittleEndian.ToUInt32 (index, index_offset + 8);
entry.IsPacked = entry.UnpackedSize != 0;
int name_len = LittleEndian.ToInt32 (index, index_offset + 0xC);
entry.Name = Encodings.cp932.GetString (index, index_offset+0x18, name_len);
entry.Type = FormatCatalog.Instance.GetTypeFromName (entry.Name);
if (!entry.CheckPlacement (file.MaxOffset))
return null;
dir.Add (entry);
index_offset += 0x18 + name_len;
}
return new TacticsArcFile (file, this, dir, password);
return new TacticsArcFile (file, this, dir, reader.Password);
}
public override Stream OpenEntry (ArcFile arc, Entry entry)
{
var tarc = arc as TacticsArcFile;
if (null == tarc)
var tent = entry as PackedEntry;
if (null == tarc || null == tarc.Password && !tent.IsPacked)
return arc.File.CreateStream (entry.Offset, entry.Size);
if (null == tarc.Password)
return new LzssStream (arc.File.CreateStream (entry.Offset, entry.Size));
var data = new byte[entry.Size];
arc.File.View.Read (entry.Offset, data, 0, entry.Size);
@ -116,10 +90,125 @@ namespace GameRes.Formats.Tactics
p = 0;
}
var input = new MemoryStream (data);
var tent = entry as PackedEntry;
if (null == tent || !tent.IsPacked)
return input;
return new LzssStream (input);
}
internal class IndexReader
{
ArcView m_file;
uint m_packed_size;
uint m_unpacked_size;
int m_count;
byte[] m_index;
Lazy<List<Entry>> m_dir;
public byte[] Password { get; private set; }
public IndexReader (ArcView file)
{
m_file = file;
m_packed_size = m_file.View.ReadUInt32 (0x10);
m_unpacked_size = m_file.View.ReadUInt32 (0x14);
m_count = m_file.View.ReadInt32 (0x18);
m_dir = new Lazy<List<Entry>> (() => new List<Entry> (m_count));
}
public List<Entry> ReadIndex ()
{
if (!IsSaneCount (m_count) || m_packed_size+0x20L > m_file.MaxOffset)
return null;
m_index = new byte[m_unpacked_size];
using (var input = m_file.CreateStream (0x20, m_packed_size))
{
try
{
if (ReadV0 (input))
return m_dir.Value;
}
catch { /* ignore V0 parse errors, try V1 */ }
input.Position = 0;
if (ReadV1 (input))
return m_dir.Value;
return null;
}
}
bool ReadV1 (Stream input)
{
// NOTE CryptoStream will close an input stream
using (var xored = new CryptoStream (input, new NotTransform(), CryptoStreamMode.Read))
using (var lzss = new LzssStream (xored))
lzss.Read (m_index, 0, m_index.Length);
int index_offset = Array.IndexOf (m_index, (byte)0);
if (-1 == index_offset || 0 == index_offset)
return false;
Password = m_index.Take (index_offset++).ToArray();
long base_offset = 0x20 + m_packed_size;
for (int i = 0; i < m_count; ++i)
{
var entry = new PackedEntry();
entry.Offset = LittleEndian.ToUInt32 (m_index, index_offset) + base_offset;
entry.Size = LittleEndian.ToUInt32 (m_index, index_offset + 4);
entry.UnpackedSize = LittleEndian.ToUInt32 (m_index, index_offset + 8);
entry.IsPacked = entry.UnpackedSize != 0;
if (!entry.CheckPlacement (m_file.MaxOffset))
return false;
int name_len = LittleEndian.ToInt32 (m_index, index_offset + 0xC);
entry.Name = Encodings.cp932.GetString (m_index, index_offset+0x18, name_len);
entry.Type = FormatCatalog.Instance.GetTypeFromName (entry.Name);
m_dir.Value.Add (entry);
index_offset += 0x18 + name_len;
}
return true;
}
bool ReadV0 (Stream input)
{
long current_offset = 0x20 + m_packed_size;
uint offset_table_size = (uint)m_count * 0x10;
if (offset_table_size > m_file.View.Reserve (current_offset, offset_table_size))
return false;
using (var lzss = new LzssStream (input, LzssMode.Decompress, true))
lzss.Read (m_index, 0, m_index.Length);
for (int i = 0; i < m_index.Length; ++i)
{
m_index[i] = (byte)(~m_index[i] - 5);
}
int index_offset = Array.IndexOf (m_index, (byte)0);
if (-1 == index_offset || 0 == index_offset)
return false;
index_offset++;
// Password = m_index.Take (index_offset++).ToArray();
for (int i = 0; i < m_count && index_offset < m_index.Length; ++i)
{
int name_end = Array.IndexOf (m_index, (byte)0, index_offset);
if (-1 == name_end)
name_end = m_index.Length;
if (index_offset == name_end)
return false;
var entry = new PackedEntry();
entry.Offset = m_file.View.ReadUInt32 (current_offset);
entry.Size = m_file.View.ReadUInt32 (current_offset+4);
entry.UnpackedSize = m_file.View.ReadUInt32 (current_offset+8);
entry.IsPacked = entry.UnpackedSize != 0;
if (!entry.CheckPlacement (m_file.MaxOffset))
return false;
entry.Name = Encodings.cp932.GetString (m_index, index_offset, name_end-index_offset);
entry.Type = FormatCatalog.Instance.GetTypeFromName (entry.Name);
m_dir.Value.Add (entry);
index_offset = name_end+1;
current_offset += 0x10;
}
return true;
}
}
}
}

4
ArcFormats/Properties/AssemblyInfo.cs
View File

@ -32,5 +32,5 @@ using System.Runtime.InteropServices;
// You can specify all the values or you can default the Build and Revision Numbers
// by using the '*' as shown below:
// [assembly: AssemblyVersion("1.0.*")]
[assembly: AssemblyVersion ("1.1.8.88")]
[assembly: AssemblyFileVersion ("1.1.8.88")]
[assembly: AssemblyVersion ("1.1.8.89")]
[assembly: AssemblyFileVersion ("1.1.8.89")]