private static HeaderEntry HeaderEntryForFile(string file)
{
HeaderEntry he = new HeaderEntry();
he.fullFileName = file;
byte[] buffer = new byte[2];
FileStream fs = new FileStream(file, FileMode.Open, FileAccess.Read, FileShare.Read, 32768);
FileStream fsToDispose = fs;
{
he.fileSize = (uint)fs.Length;
if (he.fileSize > 2)
{
// try to decompress if it looks like a gzip file
fs.Read(buffer, 0, 2);
if ((buffer[0] == 0x1f) && (buffer[1] == 0x8B))
{
fs.Seek(0, SeekOrigin.Begin);
AsyncDecompressArgs ada = new AsyncDecompressArgs(he, fs);
fsToDispose = null;
++g_jobsStarted;
#if !DEBUG
try
{
ThreadPool.QueueUserWorkItem(new WaitCallback(GetDecompressedSize), ada);
}
catch (Exception)
{
#endif
GetDecompressedSize(ada);
#if !DEBUG
Interlocked.Increment(ref g_jobsFinished);
}
#endif
}
}
}
if (fsToDispose != null)
{
fsToDispose.Dispose();
}
fs = null;
return(he);
}
private static void GetDecompressedSize(object o)
{
AsyncDecompressArgs ada = (AsyncDecompressArgs)o;
const int bufSize = 128 * 1024;
byte[] decompBuffer = new byte[bufSize];
using (ada.File)
using (GZipInputStream gzIn = new GZipInputStream(ada.File))
using (MemoryStream ms = new MemoryStream(bufSize * 2))
{
try
{
StreamUtils.Copy(gzIn, ms, decompBuffer);
ada.Entry.isCompressed = true;
ada.Entry.decompSize = (uint)ms.Position;
Interlocked.Increment(ref g_numCompressed);
}
catch (Exception)
{
; // probably isn't a gzip file afterall
}
Interlocked.Increment(ref g_jobsFinished);
}
}
