/* TAH Procedures*/
public void extract_TAH_directory()
{
Entries = null;
UInt32 arc_size = (UInt32)reader.BaseStream.Length;
header tah_header = new header();
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");
}
tah_header.index_entry_count = reader.ReadUInt32();
tah_header.unknown = 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_name = 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];
Decompression.decrypt(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 int ExtractResource(TAHEntry entry, out byte[] data_output)
{
//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 data_input_length = entry.length - 4;
//data読み込みバッファ
byte[] data_input = new byte[data_input_length];
UInt32 data_output_length;
reader.BaseStream.Position = entry.offset;
try
{
//data書き出し長さ
data_output_length = reader.ReadUInt32();
data_input = reader.ReadBytes((int)data_input_length);
}
catch (Exception)
{
System.Console.Out.WriteLine("Error: Cannot read out compressed data of the archive.");
data_output = new byte[0];
return(-1);
}
//-- data読み込み（復号前）完了! --
//data書き出しバッファ
data_output = new byte[data_output_length];
try
{
Decompression.decrypt(ref data_input, data_input_length, ref data_output, data_output_length);
}
catch (Exception)
{
System.Console.Out.WriteLine("Error: Failed to decrypt data. Possible error in archive.");
return(-1);
}
//-- data復号完了! --
return(0);
}
