void loadDirectory()
{
var maxOffset = directoryOffset + directorySize;
streamPosition = directoryOffset;
int recordIndex = 0;
fileHeaders.Clear();
fileDict.Clear();
while (streamPosition < maxOffset)
{
var curRec = new CentralDirectoryFileHeader();
curRec.loadFixedPart(reader);
if (!curRec.hasValidSignature())
{
throw new System.ArgumentException(
string.Format("Invalid signature in record {0}, file \"{1}\"", recordIndex, archiveFileName));
}
if ((curRec.getVariablePartSize() + streamPosition) > maxOffset)
{
throw new System.ArgumentException(
string.Format("Record {0} too big in file \"{1}\"", recordIndex, archiveFileName)
);
}
curRec.loadVariablePart(reader);
//Debug.LogFormat("Record {0}: {1}", recordIndex, curRec);
fileHeaders.Add(curRec);
fileDict.Add(convertToDictFileName(curRec.filename), recordIndex);
recordIndex++;
}
}
public byte[] decompressFile(CentralDirectoryFileHeader inHeader)
{
streamPosition = inHeader.fileHeaderOffset;
var localHeader = new LocalHeader();
localHeader.load(reader);
var compressedBytes = reader.ReadBytes((int)inHeader.compressedSize);
if (inHeader.compressionMethod == 0)
{
return(compressedBytes);
}
if (inHeader.compressionMethod != 8) //deflate
{
throw new System.ArgumentException(
string.Format("Unsupported compression method {0} in file \"{1}\" of archive \"{2}\"",
inHeader.filename, inHeader.compressionMethod, archiveFileName));
}
var tmp = new byte[65536];
using (var memStream = new System.IO.MemoryStream(compressedBytes))
using (var deflateStream = new System.IO.Compression.DeflateStream(memStream, System.IO.Compression.CompressionMode.Decompress))
using (var outStream = new System.IO.MemoryStream()){
int bytesRead;
while ((bytesRead = deflateStream.Read(tmp, 0, tmp.Length)) > 0)
{
outStream.Write(tmp, 0, bytesRead);
}
return(outStream.ToArray());
}
}