public override ArcFile TryOpen(ArcView file)
{
if (!file.View.AsciiEqual(4, "PACK"))
{
return(null);
}
int length = file.View.ReadInt32(0x14);
if (length < 0x10 || length >= file.MaxOffset)
{
return(null);
}
uint seed = file.View.ReadUInt32(8);
var dec = new NekoEncryption32bit(seed);
byte[] index = ReadBlock(file.View, dec, 0x10, out length);
using (var reader = new IndexReader(file, dec, index, length))
{
var dir = reader.Parse(0x18 + length);
if (null == dir)
{
return(null);
}
byte[] buffer = new byte[0x10];
reader.DetectTypes(dir, entry => {
file.View.Read(entry.Offset, buffer, 0, 0x10);
uint hash = LittleEndian.ToUInt32(buffer, 0);
if (0 != hash)
{
dec.Decrypt(hash, buffer, 8, 8);
}
return(LittleEndian.ToUInt32(buffer, 8));
});
return(new NekoArchive(file, this, dir, dec));
}
}
public override ArcFile TryOpen(ArcView file)
{
if (!file.View.AsciiEqual(4, "PACK"))
{
return(null);
}
int length = file.View.ReadInt32(0x14);
if (length <= 0 || length >= file.MaxOffset)
{
return(null);
}
uint id = file.View.ReadUInt32(8);
var dec = new NekoEncryption32bit(id);
byte[] index = ReadBlock(file.View, dec, 0x10, out length);
long offset = 0x18 + length;
var dir = new List <Entry>();
int index_pos = 0;
for (int remaining = length; remaining > 0;)
{
int count = LittleEndian.ToInt32(index, index_pos + 4);
if (count <= 0 || count > remaining / 8 - 1)
{
return(null);
}
uint hash = LittleEndian.ToUInt32(index, index_pos);
dir.Capacity = dir.Count + count;
index_pos += 8;
for (int j = 0; j < count; ++j)
{
var entry = new Entry
{
Offset = offset, Size = LittleEndian.ToUInt32(index, index_pos + 4)
};
if (!entry.CheckPlacement(file.MaxOffset))
{
return(null);
}
index_pos += 8;
offset += entry.Size + 8;
dir.Add(entry);
}
remaining -= 8 + count * 8;
}
int i = 0;
byte[] buffer = new byte[0x10];
foreach (var entry in dir)
{
file.View.Read(entry.Offset, buffer, 0, 0x10);
uint hash = LittleEndian.ToUInt32(buffer, 0);
if (0 != hash)
{
dec.Decrypt(hash, buffer, 8, 8);
}
uint signature = LittleEndian.ToUInt32(buffer, 8);
var res = AutoEntry.DetectFileType(signature);
string ext = "";
if (null != res)
{
ext = res.Extensions.FirstOrDefault();
entry.Type = res.Type;
}
else if (0x474e4d8a == signature)
{
ext = "mng";
}
if (!string.IsNullOrEmpty(ext))
{
entry.Name = string.Format("{0:D4}.{1}", i, ext);
}
else
{
entry.Name = i.ToString("D4");
}
++i;
}
return(new NekoArchive(file, this, dir, dec));
}
public override ArcFile TryOpen(ArcView file)
{
if (!file.View.AsciiEqual (4, "PACK"))
return null;
int length = file.View.ReadInt32 (0x14);
if (length <= 0 || length >= file.MaxOffset)
return null;
uint id = file.View.ReadUInt32 (8);
var dec = new NekoEncryption32bit (id);
byte[] index = ReadBlock (file.View, dec, 0x10, out length);
long offset = 0x18 + length;
var dir = new List<Entry>();
int index_pos = 0;
for (int remaining = length; remaining > 0;)
{
int count = LittleEndian.ToInt32 (index, index_pos+4);
if (count <= 0 || count > remaining/8-1)
return null;
uint hash = LittleEndian.ToUInt32 (index, index_pos);
dir.Capacity = dir.Count + count;
index_pos += 8;
for (int j = 0; j < count; ++j)
{
var entry = new Entry
{ Offset = offset, Size = LittleEndian.ToUInt32 (index, index_pos+4) };
if (!entry.CheckPlacement (file.MaxOffset))
return null;
index_pos += 8;
offset += entry.Size + 8;
dir.Add (entry);
}
remaining -= 8 + count * 8;
}
int i = 0;
byte[] buffer = new byte[0x10];
foreach (var entry in dir)
{
file.View.Read (entry.Offset, buffer, 0, 0x10);
uint hash = LittleEndian.ToUInt32 (buffer, 0);
if (0 != hash)
{
dec.Decrypt (hash, buffer, 8, 8);
}
uint signature = LittleEndian.ToUInt32 (buffer, 8);
var res = AutoEntry.DetectFileType (signature);
string ext = "";
if (null != res)
{
ext = res.Extensions.FirstOrDefault();
entry.Type = res.Type;
}
else if (0x474e4d8a == signature)
ext = "mng";
if (!string.IsNullOrEmpty (ext))
entry.Name = string.Format ("{0:D4}.{1}", i, ext);
else
entry.Name = i.ToString ("D4");
++i;
}
return new NekoArchive (file, this, dir, dec);
}
