private Psf2DirectoryEntry[] getDirectoryEntries(UInt32 pOffset)
{
UInt32 numberOfDirectoryEntries;
Psf2DirectoryEntry[] ret;
System.Text.Encoding enc = System.Text.Encoding.ASCII;
using (FileStream fs = File.Open(this.FilePath, FileMode.Open, FileAccess.Read))
{
numberOfDirectoryEntries =
BitConverter.ToUInt32(ParseFile.ParseSimpleOffset(fs, pOffset, 4), 0);
ret = new Psf2DirectoryEntry[numberOfDirectoryEntries];
for (UInt32 i = 0; i < numberOfDirectoryEntries; i++)
{
ret[i].Filename =
enc.GetString(FileUtil.ReplaceNullByteWithSpace(ParseFile.ParseSimpleOffset(fs, (pOffset + 4) + (48 * i), 36))).Trim();
ret[i].Offset =
Xsf.RESERVED_SECTION_OFFSET +
BitConverter.ToUInt32(ParseFile.ParseSimpleOffset(fs, (pOffset + 4) + (48 * i) + 36, 4), 0);
ret[i].UncompressedSize =
BitConverter.ToUInt32(ParseFile.ParseSimpleOffset(fs, (pOffset + 4) + (48 * i) + 40, 4), 0);
ret[i].BlockSize =
BitConverter.ToUInt32(ParseFile.ParseSimpleOffset(fs, (pOffset + 4) + (48 * i) + 44, 4), 0);
}
}
return(ret);
}
public static bool IsSubdirectory(Psf2DirectoryEntry pPsf2DirectoryEntry)
{
return(pPsf2DirectoryEntry.UncompressedSize == 0 &&
pPsf2DirectoryEntry.BlockSize == 0 &&
pPsf2DirectoryEntry.Offset != 0);
}
public static bool IsEmptyFile(Psf2DirectoryEntry pPsf2DirectoryEntry)
{
return(pPsf2DirectoryEntry.UncompressedSize == 0 &&
pPsf2DirectoryEntry.BlockSize == 0 &&
pPsf2DirectoryEntry.Offset == 0);
}
private void extractFile(Psf2DirectoryEntry pPsf2DirectoryEntry, string pDestinationFile)
{
uint blockCount =
((pPsf2DirectoryEntry.UncompressedSize + pPsf2DirectoryEntry.BlockSize) - 1) / pPsf2DirectoryEntry.BlockSize;
UInt32[] blockTable = new UInt32[blockCount];
string tempCompressedFile = Path.GetTempFileName();
byte[] uncompressedBlock;
byte[] compressedBlock;
int bytesRead;
int bytesInflated;
long totalBytesInflated = 0;
MemoryStream compressedBytesStream;
using (FileStream pfs = File.Open(this.FilePath, FileMode.Open, FileAccess.Read))
{
pfs.Position = (long)pPsf2DirectoryEntry.Offset;
for (int i = 0; i < blockCount; i++)
{
blockTable[i] =
BitConverter.ToUInt32(ParseFile.ParseSimpleOffset(pfs, (long)pPsf2DirectoryEntry.Offset + (i * 4), 4), 0);
}
pfs.Position = (long)(pPsf2DirectoryEntry.Offset + (blockCount * 4));
if (!IsEmptyFile(pPsf2DirectoryEntry))
{
// write compressed bytes to mem stream and decompress to file
foreach (UInt32 b in blockTable)
{
compressedBlock = new byte[b];
bytesRead = pfs.Read(compressedBlock, 0, (int)b);
using (compressedBytesStream = new MemoryStream(compressedBlock, 0, bytesRead))
{
using (FileStream outputFs = File.Open(pDestinationFile, FileMode.Append, FileAccess.Write))
{
using (ZlibStream zs = new ZlibStream(compressedBytesStream, CompressionMode.Decompress, true))
{
if ((int)b > 0x2000)
{
zs.BufferSize = (int)b;
}
else
{
zs.BufferSize = 0x2000;
}
uncompressedBlock = new byte[pPsf2DirectoryEntry.BlockSize];
using (BinaryWriter bw = new BinaryWriter(outputFs))
{
while ((bytesInflated = zs.Read(uncompressedBlock, 0, uncompressedBlock.Length)) > 0)
{
totalBytesInflated += bytesInflated;
bw.Write(uncompressedBlock, 0, bytesInflated);
}
}
}
}
}
}
}
}
}
