mirror of
https://github.com/crskycode/GARbro.git
synced 2024-11-23 21:55:34 +08:00
variation of PAC archives.
This commit is contained in:
parent
120b4aa3cd
commit
36b912da07
@ -73,41 +73,107 @@ namespace GameRes.Formats.NeXAS
|
||||
{
|
||||
if (!file.View.AsciiEqual (0, "PAC") || 'K' == file.View.ReadByte (3))
|
||||
return null;
|
||||
int count = file.View.ReadInt32 (4);
|
||||
if (!IsSaneCount (count))
|
||||
return null;
|
||||
int pack_type = file.View.ReadInt32 (8);
|
||||
uint index_size = file.View.ReadUInt32 (file.MaxOffset-4);
|
||||
if (index_size >= file.MaxOffset)
|
||||
var reader = new IndexReader (file);
|
||||
var dir = reader.Read();
|
||||
if (null == dir)
|
||||
return null;
|
||||
|
||||
byte[] index_packed = new byte[index_size];
|
||||
file.View.Read (file.MaxOffset-4-index_size, index_packed, 0, index_size);
|
||||
for (int i = 0; i < index_packed.Length; ++i)
|
||||
index_packed[i] = (byte)~index_packed[i];
|
||||
|
||||
var index = HuffmanDecode (index_packed, count*0x4c);
|
||||
var dir = new List<Entry> (count);
|
||||
int offset = 0;
|
||||
for (int i = 0; i < count; ++i, offset += 0x4c)
|
||||
{
|
||||
var name = Binary.GetCString (index, offset, 0x40);
|
||||
var entry = new PackedEntry
|
||||
{
|
||||
Name = name,
|
||||
Type = FormatCatalog.Instance.GetTypeFromName (name),
|
||||
Offset = LittleEndian.ToUInt32 (index, offset+0x40),
|
||||
UnpackedSize = LittleEndian.ToUInt32 (index, offset+0x44),
|
||||
Size = LittleEndian.ToUInt32 (index, offset+0x48),
|
||||
};
|
||||
if (!entry.CheckPlacement (file.MaxOffset))
|
||||
return null;
|
||||
entry.IsPacked = pack_type != 0 && (pack_type != 4 || entry.Size != entry.UnpackedSize);
|
||||
dir.Add (entry);
|
||||
}
|
||||
if (0 == pack_type)
|
||||
if (Compression.None == reader.PackType)
|
||||
return new ArcFile (file, this, dir);
|
||||
return new PacArchive (file, this, dir, (Compression)pack_type);
|
||||
return new PacArchive (file, this, dir, reader.PackType);
|
||||
}
|
||||
|
||||
internal sealed class IndexReader
|
||||
{
|
||||
ArcView m_file;
|
||||
int m_count;
|
||||
int m_pack_type;
|
||||
|
||||
const int MaxNameLength = 0x40;
|
||||
|
||||
public Compression PackType { get { return (Compression)m_pack_type; } }
|
||||
|
||||
public IndexReader (ArcView file)
|
||||
{
|
||||
m_file = file;
|
||||
m_count = file.View.ReadInt32 (4);
|
||||
m_pack_type = file.View.ReadInt32 (8);
|
||||
}
|
||||
|
||||
List<Entry> m_dir;
|
||||
|
||||
public List<Entry> Read ()
|
||||
{
|
||||
if (!IsSaneCount (m_count))
|
||||
return null;
|
||||
m_dir = new List<Entry> (m_count);
|
||||
bool success = false;
|
||||
try
|
||||
{
|
||||
success = ReadOld();
|
||||
}
|
||||
catch { /* ignore parse errors */ }
|
||||
if (!success && !ReadNew())
|
||||
return null;
|
||||
return m_dir;
|
||||
}
|
||||
|
||||
bool ReadNew ()
|
||||
{
|
||||
uint index_size = m_file.View.ReadUInt32 (m_file.MaxOffset-4);
|
||||
int unpacked_size = m_count*0x4C;
|
||||
if (index_size >= m_file.MaxOffset || index_size > unpacked_size*2)
|
||||
return false;
|
||||
|
||||
var index_packed = m_file.View.ReadBytes (m_file.MaxOffset-4-index_size, index_size);
|
||||
for (int i = 0; i < index_packed.Length; ++i)
|
||||
index_packed[i] = (byte)~index_packed[i];
|
||||
|
||||
var index = HuffmanDecode (index_packed, unpacked_size);
|
||||
using (var input = new MemoryStream (index))
|
||||
if (!ReadFromStream (input, 0x40))
|
||||
return false;
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
bool ReadOld ()
|
||||
{
|
||||
using (var input = m_file.CreateStream())
|
||||
{
|
||||
input.Position = 0xC;
|
||||
if (!ReadFromStream (input, 0x20))
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
byte[] m_name_buffer = new byte[MaxNameLength];
|
||||
|
||||
bool ReadFromStream (Stream input, int name_length)
|
||||
{
|
||||
m_dir.Clear();
|
||||
using (var index = new ArcView.Reader (input))
|
||||
{
|
||||
for (int i = 0; i < m_count; ++i)
|
||||
{
|
||||
if (name_length != index.Read (m_name_buffer, 0, name_length))
|
||||
return false;
|
||||
var name = Binary.GetCString (m_name_buffer, 0, name_length);
|
||||
if (string.IsNullOrWhiteSpace (name))
|
||||
return false;
|
||||
var entry = FormatCatalog.Instance.Create<PackedEntry> (name);
|
||||
entry.Offset = index.ReadUInt32();
|
||||
entry.UnpackedSize = index.ReadUInt32();
|
||||
entry.Size = index.ReadUInt32();
|
||||
if (!entry.CheckPlacement (m_file.MaxOffset))
|
||||
return false;
|
||||
entry.IsPacked = m_pack_type != 0 && (m_pack_type != 4 || entry.Size != entry.UnpackedSize);
|
||||
m_dir.Add (entry);
|
||||
}
|
||||
return true;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
public override Stream OpenEntry (ArcFile arc, Entry entry)
|
||||
@ -120,19 +186,15 @@ namespace GameRes.Formats.NeXAS
|
||||
switch (pac.PackType)
|
||||
{
|
||||
case Compression.Lzss:
|
||||
using (input)
|
||||
using (var reader = new LzssReader (input, (int)pent.Size, (int)pent.UnpackedSize))
|
||||
{
|
||||
reader.Unpack();
|
||||
return new MemoryStream (reader.Data, false);
|
||||
}
|
||||
return new LzssStream (input);
|
||||
|
||||
case Compression.Huffman:
|
||||
using (input)
|
||||
{
|
||||
var packed = new byte[entry.Size];
|
||||
input.Read (packed, 0, packed.Length);
|
||||
var unpacked = HuffmanDecode (packed, (int)pent.UnpackedSize);
|
||||
return new MemoryStream (unpacked, 0, (int)pent.UnpackedSize, false);
|
||||
return new MemoryStream (unpacked, 0, (int)pent.UnpackedSize);
|
||||
}
|
||||
case Compression.Deflate:
|
||||
default:
|
||||
|
Loading…
Reference in New Issue
Block a user