public byte[] ExtractResource(TAHEntry entry)
{
//data読み込み長さ
//-4はdata書き出し長さ格納領域 (UInt32) を減じている
UInt32 input_length = entry.length - 4;
//data読み込みバッファ
byte[] data_input = new byte[input_length];
UInt32 output_length;
reader.BaseStream.Position = entry.offset;
//data書き出し長さ
output_length = reader.ReadUInt32();
data_input = reader.ReadBytes((int)input_length);
//-- data読み込み（復号前）完了! --
//data書き出しバッファ
byte[] data_output = new byte[output_length];
TAHCryption.crypt(ref data_input, input_length, output_length);
Decompression.infrate(ref data_input, input_length, ref data_output, output_length);
//-- data復号完了! --
return(data_output);
}
/* TAH Procedures*/
public void extract_TAH_directory()
{
Entries = null;
UInt32 arc_size = (UInt32)reader.BaseStream.Length;
byte[] magic = reader.ReadBytes(4);
if (magic[0] != (byte)'T' || magic[1] != (byte)'A' || magic[2] != (byte)'H' || magic[3] != (byte)'2')
{
throw new Exception("File is not TAH");
}
Header tah_header;
tah_header.index_entry_count = reader.ReadUInt32();
tah_header.version = reader.ReadUInt32();
tah_header.reserved = reader.ReadUInt32();
UInt32 index_buffer_size = tah_header.index_entry_count * 8; //sizeof(index_entry) == 8
Entries = new TAHEntry[tah_header.index_entry_count];
for (int i = 0; i < tah_header.index_entry_count; i++)
{
Entries[i] = new TAHEntry();
Entries[i].hash_code = reader.ReadUInt32();
Entries[i].offset = reader.ReadUInt32();
}
UInt32 output_length = reader.ReadUInt32();
//entry情報の読み出し長さ
UInt32 input_length = Entries[0].offset - /*sizeof(Header)*/ 16 - index_buffer_size;
//entry情報の読み出しバッファ
byte[] data_input = new byte[input_length];
data_input = reader.ReadBytes((int)input_length);
//-- entry情報の読み込み完了! --
byte[] output_data = new byte[output_length];
TAHCryption.crypt(ref data_input, input_length, output_length);
Decompression.infrate(ref data_input, input_length, ref output_data, output_length);
//-- entry情報の復号完了! --
build_TAHEntries(output_data, arc_size);
}
public void build_TAHEntries(byte[] str_file_path, UInt32 arc_size)
{
using (BinaryReader br = new BinaryReader(new MemoryStream(str_file_path)))
{
try
{
string path = "";
while (true)
{
string name = br.ReadCString();
if (name.EndsWith("/"))
{
path = name;
}
else
{
string file_name = path + name;
TAHEntry ent = FindTAHEntryByHash(CalcHash(file_name));
if (ent != null)
{
ent.file_name = file_name;
}
}
}
}
catch (EndOfStreamException)
{
}
}
ext_file_list external_files;
build_ext_file_list(out external_files);
for (UInt32 i = 0; i < Entries.Length; i++)
{
//file_nameが見つからなかった場合
if (Entries[i].file_name == null)
{
//names.txt を検索
int pos = -1;
if (external_files.files != null)
{
pos = Array.BinarySearch(external_files.hashkeys, Entries[i].hash_name);
}
if (pos < 0) // not found
{
//ファイル名は <hash>にする
Entries[i].file_name = string.Format("{0:X8}", Entries[i].hash_name);
//file_nameが見つからなかったflag on
Entries[i].flag ^= 0x1;
}
else
{
Entries[i].file_name = external_files.files[pos];
}
}
}
for (UInt32 i = 0; i < Entries.Length - 1; i++)
{
//data読み込み長さを設定
//読み込み長さは現在entryオフセットと次のentryオフセットとの差である
Entries[i].length = Entries[i + 1].offset - Entries[i].offset;
}
//最終entry data読み込み長さを設定
Entries[Entries.Length - 1].length = arc_size - Entries[Entries.Length - 1].offset;
}
