/// <summary>
/// Decompresses data and returns a new BinaryReaderEx if necessary.
/// </summary>
public static BinaryReaderEx GetDecompressedBR(BinaryReaderEx br, out DCX.Type compression)
{
if (DCX.Is(br))
{
byte[] bytes = DCX.Decompress(br, out compression);
return(new BinaryReaderEx(false, bytes));
}
else
{
compression = DCX.Type.None;
return(br);
}
}
/// <summary>
/// Guesses the extension of a file based on its contents.
/// </summary>
public static string GuessExtension(byte[] bytes, bool bigEndian = false)
{
bool dcx = false;
if (DCX.Is(bytes))
{
dcx = true;
bytes = DCX.Decompress(bytes);
}
bool checkMsb(BinaryReaderEx br)
{
if (br.Length < 8)
{
return(false);
}
int offset = br.GetInt32(4);
if (offset < 0 || offset >= br.Length - 1)
{
return(false);
}
try
{
return(br.GetASCII(offset) == "MODEL_PARAM_ST");
}
catch
{
return(false);
}
}
bool checkParam(BinaryReaderEx br)
{
if (br.Length < 0x2C)
{
return(false);
}
string param = br.GetASCII(0xC, 0x20);
return(Regex.IsMatch(param, "^[^\0]+\0 *$"));
}
bool checkTdf(BinaryReaderEx br)
{
if (br.Length < 4)
{
return(false);
}
if (br.GetASCII(0, 1) != "\"")
{
return(false);
}
for (int i = 1; i < br.Length; i++)
{
if (br.GetASCII(i, 1) == "\"")
{
return(i < br.Length - 2 && br.GetASCII(i + 1, 2) == "\r\n");
}
}
return(false);
}
string ext = "";
using (var ms = new MemoryStream(bytes))
{
var br = new BinaryReaderEx(bigEndian, ms);
string magic = null;
if (br.Length >= 4)
{
magic = br.ReadASCII(4);
}
if (magic == "AISD")
{
ext = ".aisd";
}
else if (magic == "BDF3" || magic == "BDF4")
{
ext = ".bdt";
}
else if (magic == "BHF3" || magic == "BHF4")
{
ext = ".bhd";
}
else if (magic == "BND3" || magic == "BND4")
{
ext = ".bnd";
}
else if (magic == "DDS ")
{
ext = ".dds";
}
// ESD or FFX
else if (magic != null && magic.ToUpper() == "DLSE")
{
ext = ".dlse";
}
else if (bigEndian && magic == "\0BRD" || !bigEndian && magic == "DRB\0")
{
ext = ".drb";
}
else if (magic == "EDF\0")
{
ext = ".edf";
}
else if (magic == "ELD\0")
{
ext = ".eld";
}
else if (magic == "ENFL")
{
ext = ".entryfilelist";
}
else if (magic != null && magic.ToUpper() == "FSSL")
{
ext = ".esd";
}
else if (magic == "EVD\0")
{
ext = ".evd";
}
else if (br.Length >= 3 && br.GetASCII(0, 3) == "FEV" || br.Length >= 0x10 && br.GetASCII(8, 8) == "FEV FMT ")
{
ext = ".fev";
}
else if (br.Length >= 6 && br.GetASCII(0, 6) == "FLVER\0")
{
ext = ".flver";
}
else if (br.Length >= 3 && br.GetASCII(0, 3) == "FSB")
{
ext = ".fsb";
}
else if (br.Length >= 3 && br.GetASCII(0, 3) == "GFX")
{
ext = ".gfx";
}
else if (br.Length >= 0x19 && br.GetASCII(0xC, 0xE) == "ITLIMITER_INFO")
{
ext = ".itl";
}
else if (br.Length >= 4 && br.GetASCII(1, 3) == "Lua")
{
ext = ".lua";
}
else if (checkMsb(br))
{
ext = ".msb";
}
else if (br.Length >= 0x30 && br.GetASCII(0x2C, 4) == "MTD ")
{
ext = ".mtd";
}
else if (magic == "DFPN")
{
ext = ".nfd";
}
else if (checkParam(br))
{
ext = ".param";
}
else if (br.Length >= 4 && br.GetASCII(1, 3) == "PNG")
{
ext = ".png";
}
else if (br.Length >= 0x2C && br.GetASCII(0x28, 4) == "SIB ")
{
ext = ".sib";
}
else if (magic == "TAE ")
{
ext = ".tae";
}
else if (checkTdf(br))
{
ext = ".tdf";
}
else if (magic == "TPF\0")
{
ext = ".tpf";
}
else if (magic == "#BOM")
{
ext = ".txt";
}
else if (br.Length >= 5 && br.GetASCII(0, 5) == "<?xml")
{
ext = ".xml";
}
// This is pretty sketchy
else if (br.Length >= 0xC && br.GetByte(0) == 0 && br.GetByte(3) == 0 && br.GetInt32(4) == br.Length && br.GetInt16(0xA) == 0)
{
ext = ".fmg";
}
}
if (dcx)
{
return(ext + ".dcx");
}
else
{
return(ext);
}
}
