int GetNumFileParts(int index)
{
if (index == -1)
{
return(-1);
}
DirStream.Seek(index * 14 + 13, SeekOrigin.Begin);
int b = DirStream.ReadByte();
if ((b & 0x80) == 0)
{
return(1);
}
return(b & 0x7f);
}
/**
* Get the compressed data of a file. (First 2 bytes are uncompressed size.)
*/
public byte[] GetCompressedFileData(string filename, int part = 0)
{
/*
* if (part == 0)
* Console.WriteLine(filename);
*/
int index = GetFilenameIndex(filename);
if (index == -1)
{
string newFilename = AddToFileIndex(filename, -1);
if (newFilename != "")
{
try {
return(GetCompressedFileData(newFilename, part + 1));
}
catch (FileNotFoundException) {}
}
throw new FileNotFoundException("File \"" + filename + "\" not found.");
}
DirStream.Seek(index * 14 + 11, SeekOrigin.Begin);
int indexOffset = DirStream.ReadByte() + (DirStream.ReadByte() << 8) + (DirStream.ReadByte() << 16);
/*
* if ((indexOffset & 1) != 0) {
* // This is normal for "type 2" data?
* Console.WriteLine("WARN: bit 0 of indexOffset is set");
* }
*/
if ((indexOffset & (1 << 23)) != 0)
{
indexOffset &= 0xFFFF;
return(GetCompressedType2FileData(indexOffset, part));
}
else
{
indexOffset &= 0xFFFFFF;
return(GetCompressedType1FileData(indexOffset));
}
}
/**
* Get the uncompressed data of a file.
*/
public byte[] GetFileData(string filename, int part = 0)
{
LZSS.processingFile = filename;
/*
* if (part == 0)
* Console.WriteLine(filename);
*/
int index = GetFilenameIndex(filename);
if (index == -1)
{
string newFilename = AddToFileIndex(filename, -1);
if (newFilename != "")
{
try {
return(GetFileData(newFilename, part + 1));
}
catch (FileNotFoundException) {}
}
throw new FileNotFoundException("File \"" + filename + "\" not found.");
}
DirStream.Seek(index * 14 + 11, SeekOrigin.Begin);
int indexOffset = DirStream.ReadByte() + (DirStream.ReadByte() << 8) + (DirStream.ReadByte() << 16);
if ((indexOffset & (1 << 23)) != 0)
{
indexOffset &= 0xFFFF;
return(GetType2FileData(indexOffset, part));
}
else
{
indexOffset &= 0xFFFFFF;
return(GetType1FileData(indexOffset));
}
}
string GetIndexFilename(int index)
{
DirStream.Seek(index * 14, SeekOrigin.Begin);
string filename = "";
for (int i = 0; i < 8; i++)
{
int c = DirStream.ReadByte();
if (c == -1)
{
break;
}
if (c != '\0')
{
filename += (char)c;
}
}
string extension = "";
for (int i = 0; i < 3; i++)
{
char c = (char)DirStream.ReadByte();
if (c != '\0')
{
extension += c;
}
}
if (extension.Length != 0)
{
filename += "." + extension;
}
return(filename);
}