public void Decode()
{
GetSzsFile();
newBfresFile = szsFileName;
while (File.Exists(@"bfres\" + newBfresFile + ".bfres") && write == true)
{
HandleConflict();
}
if (!write)
{
return;
}
if (File.Exists(szsFileWithPath))
{
byte[] Data = File.ReadAllBytes(szsFileWithPath);
if (Encoding.ASCII.GetString(Data.Take(4).ToArray()) == "Yaz0")
{
// Successfully deterimed it's a Yaz0 file.
int Decompressed_Size = BitConverter.ToInt32(Data.Skip(4).Take(4).Reverse().ToArray(), 0);
Data = Data.Skip(16).ToArray();
byte[] Decompressed_Data = new byte[Decompressed_Size];
int Read_Position = 0;
int Write_Position = 0;
uint ValidBitCount = 0;
byte CurrentCodeByte = 0;
while (Write_Position < Decompressed_Size)
{
if (ValidBitCount == 0)
{
CurrentCodeByte = Data[Read_Position];
++Read_Position;
ValidBitCount = 8;
}
if ((CurrentCodeByte & 0x80) != 0)
{
Decompressed_Data[Write_Position] = Data[Read_Position];
Write_Position++;
Read_Position++;
}
else
{
byte Byte1 = Data[Read_Position];
byte Byte2 = Data[Read_Position + 1];
Read_Position += 2;
uint Dist = (uint)(((Byte1 & 0xF) << 8) | Byte2);
uint CopySource = (uint)(Write_Position - (Dist + 1));
uint Byte_Count = (uint)(Byte1 >> 4);
if (Byte_Count == 0)
{
Byte_Count = (uint)(Data[Read_Position] + 0x12);
Read_Position++;
}
else
{
Byte_Count += 2;
}
for (int i = 0; i < Byte_Count; ++i)
{
Decompressed_Data[Write_Position] = Decompressed_Data[CopySource];
CopySource++;
Write_Position++;
}
}
CurrentCodeByte <<= 1;
ValidBitCount -= 1;
}
string File_Type = "bin";
// Check to see if our decompressed file has an extension
if (Decompressed_Data[0] != 0)
{
File_Type = Encoding.ASCII.GetString(Decompressed_Data.Take(4).ToArray()).ToLower();
}
string File_Path = Path.GetDirectoryName(szsFileWithPath) + @"\" + Path.GetFileNameWithoutExtension(szsFileWithPath);
FileStream Decompressed_File;
try { Decompressed_File = File.Create(File_Path + @"." + File_Type, Decompressed_Size); }
catch { Decompressed_File = File.Create(File_Path + @".bin", Decompressed_Size); }
Decompressed_File.Write(Decompressed_Data, 0, Decompressed_Size);
Decompressed_File.Flush();
Decompressed_File.Close();
Console.ForegroundColor = ConsoleColor.Cyan;
Console.WriteLine("\nSuccessfully decompressed Yaz0 compressed file!\n");
if (!Directory.Exists("bfres\\"))
{
Console.ForegroundColor = ConsoleColor.Yellow;
Console.WriteLine(@"Creating 'bfres\'");
Directory.CreateDirectory("bfres\\");
Console.WriteLine(" done\n");
}
File.Move(@"szs\" + szsFileName + ".fres", @"bfres\" + newBfresFile + ".bfres");
}
else
{
Console.WriteLine("The file does not appear to be a valid Yaz0 compressed file!\n");
}
}
else
{
Console.WriteLine("The file specified does not exist.\n");
}
}
static void Main(string[] args)
{
if (args.Length < 1)
{
Console.WriteLine("Please enter the path to the Yaz0 encoded file:");
args = new string[1];
args[0] = Console.ReadLine();
}
if (File.Exists(args[0]))
{
byte[] Data = File.ReadAllBytes(args[0]);
if (Encoding.ASCII.GetString(Data.Take(4).ToArray()) == "Yaz0")
{
// Successfully deterimed it's a Yaz0 file.
int Decompressed_Size = BitConverter.ToInt32(Data.Skip(4).Take(4).Reverse().ToArray(), 0);
Data = Data.Skip(16).ToArray();
byte[] Decompressed_Data = new byte[Decompressed_Size];
int Read_Position = 0;
int Write_Position = 0;
uint ValidBitCount = 0;
byte CurrentCodeByte = 0;
while (Write_Position < Decompressed_Size)
{
if (ValidBitCount == 0)
{
CurrentCodeByte = Data[Read_Position];
++Read_Position;
ValidBitCount = 8;
}
if ((CurrentCodeByte & 0x80) != 0)
{
Decompressed_Data[Write_Position] = Data[Read_Position];
Write_Position++;
Read_Position++;
}
else
{
byte Byte1 = Data[Read_Position];
byte Byte2 = Data[Read_Position + 1];
Read_Position += 2;
uint Dist = (uint)(((Byte1 & 0xF) << 8) | Byte2);
uint CopySource = (uint)(Write_Position - (Dist + 1));
uint Byte_Count = (uint)(Byte1 >> 4);
if (Byte_Count == 0)
{
Byte_Count = (uint)(Data[Read_Position] + 0x12);
Read_Position++;
}
else
{
Byte_Count += 2;
}
for (int i = 0; i < Byte_Count; ++i)
{
Decompressed_Data[Write_Position] = Decompressed_Data[CopySource];
CopySource++;
Write_Position++;
}
}
CurrentCodeByte <<= 1;
ValidBitCount -= 1;
}
string File_Type = "bin";
// Check to see if our decompressed file has an extension
if (Decompressed_Data[0] != 0)
{
File_Type = Encoding.ASCII.GetString(Decompressed_Data.Take(4).ToArray()).ToLower();
}
string File_Path = Path.GetDirectoryName(args[0]) + @"\" + Path.GetFileNameWithoutExtension(args[0]);
FileStream Decompressed_File;
try { Decompressed_File = File.Create(File_Path + @"." + File_Type, Decompressed_Size); }
catch { Decompressed_File = File.Create(File_Path + @".bin", Decompressed_Size); }
Decompressed_File.Write(Decompressed_Data, 0, Decompressed_Size);
Decompressed_File.Flush();
Decompressed_File.Close();
Console.WriteLine("Successfully decompressed Yaz0 compressed file!");
Console.WriteLine("Press any key to close the window.");
Console.ReadKey();
}
else
{
Console.WriteLine("The file does not appear to be a valid Yaz0 compressed file! Press any key to close the window.");
Console.ReadKey();
}
}
else
{
Console.WriteLine("The file specified does not exist. Press any key to close the window.");
Console.ReadKey();
}
}
