protected void ReleaseOpenedZipEntry(string path)
{
OpenedZipEntry zipEntry = null;
lock (zipEntries)
{
zipEntry = zipEntries[path];
}
lock (zipEntry)
{
zipEntry.OpenCount--;
}
lock (zipEntry)
{
if (zipEntry.OpenCount == 0)
{
lock (zipEntryCache)
{
int lastAccessed = -1;
DateTime lastAccess = DateTime.Now;
int emptyIndex = -1;
for (int i = 0; i < zipEntryCache.Length; i++)
{
if (zipEntryCache[i] == null)
{
emptyIndex = i;
break;
}
if (zipEntryCache[i].LastAccess < lastAccess)
{
lastAccessed = i;
lastAccess = zipEntryCache[i].LastAccess;
}
}
if (emptyIndex < 0)
{
if (zipEntryCache[lastAccessed].Stream != null)
{
zipEntryCache[lastAccessed].Stream.Close();
}
zipEntryCache[lastAccessed].Stream = null;
zipEntryCache[lastAccessed].Data = null;
if (zipEntryCache[lastAccessed].ZipFile != null)
{
ReleaseZipFileReference(zipEntryCache[lastAccessed].ZipFile.Path);
}
zipEntryCache[lastAccessed].ZipFile = null;
zipEntryCache[lastAccessed] = null;
emptyIndex = lastAccessed;
}
zipEntryCache[emptyIndex] = zipEntry;
lock (zipEntries)
{
zipEntries.Remove(path);
}
zipEntry.LastAccess = DateTime.Now;
}
}
}
}
protected OpenedZipEntry LockOpenedZipEntryFromCache(string path)
{
OpenedZipEntry zipEntry = null;
lock (zipEntryCache)
{
int cacheIndex = -1;
for (int i = 0; i < zipEntryCache.Length; i++)
{
if ((zipEntryCache[i] != null) && (zipEntryCache[i].Path == path))
{
cacheIndex = i;
break;
}
}
zipEntry = zipEntryCache[cacheIndex];
lock (zipEntries)
{
zipEntries.Add(path, zipEntry);
}
zipEntryCache[cacheIndex] = null;
}
lock (zipEntry)
{
zipEntry.OpenCount++;
}
return(zipEntry);
}
protected OpenedZipEntry LockOpenedZipEntry(string path)
{
OpenedZipEntry zipEntry = null;
lock (zipEntries)
{
zipEntry = zipEntries[path];
}
lock (zipEntry)
{
zipEntry.OpenCount++;
}
return(zipEntry);
}
protected OpenedZipEntry CreateOpenedZipEntry(ZipFileReference zipFile, string fullPath, string path)
{
OpenedZipEntry entry = new OpenedZipEntry();
entry.Path = fullPath;
entry.ZipFile = zipFile;
entry.ZipEntry = zipFile.ZipFile.GetEntry(path);
entry.Stream = zipFile.ZipFile.GetInputStream(entry.ZipEntry);
entry.Data = new byte[entry.ZipEntry.Size];
entry.OpenCount++;
entry.LastAccess = DateTime.Now;
lock (zipEntries)
{
zipEntries.Add(fullPath, entry);
}
return(entry);
}
void ReadToPosition(OpenedZipEntry entry, long position)
{
position = Math.Min(entry.Data.LongLength, position);
if (entry.Position == entry.Data.LongLength)
{
return;
}
while (position > entry.Position)
{
int read = entry.Stream.Read(entry.Data, (int)entry.Position, (int)(position - entry.Position));
entry.Position += read;
}
if (entry.Position == entry.Data.LongLength)
{
entry.Stream.Close();
entry.Stream = null;
entry.ZipEntry = null;
ReleaseZipFileReference(entry.ZipFile.Path);
entry.ZipFile = null;
}
}
protected override Errno OnReadHandle(string file, OpenedPathInfo info, byte[] buf, long offset, out int bytesWritten)
{
OpenedZipEntry entry = null;
lock (zipEntries)
{
entry = zipEntries[file];
}
lock (entry)
{
if (entry.Position < offset + buf.LongLength)
{
ReadToPosition(entry, offset + buf.LongLength);
}
}
long maxRead = Math.Min(entry.Data.LongLength - offset, buf.LongLength);
Array.Copy(entry.Data, offset, buf, 0, maxRead);
bytesWritten = (int)maxRead;
return(0);
}
protected OpenedZipEntry CreateOpenedZipEntry(ZipFileReference zipFile, string fullPath, string path)
{
OpenedZipEntry entry = new OpenedZipEntry();
entry.Path = fullPath;
entry.ZipFile = zipFile;
entry.ZipEntry = zipFile.ZipFile.GetEntry(path);
entry.Stream = zipFile.ZipFile.GetInputStream(entry.ZipEntry);
entry.Data = new byte[entry.ZipEntry.Size];
entry.OpenCount++;
entry.LastAccess = DateTime.Now;
lock (zipEntries)
{
zipEntries.Add(fullPath, entry);
}
return entry;
}
void ReadToPosition(OpenedZipEntry entry, long position)
{
position = Math.Min(entry.Data.LongLength, position);
if (entry.Position == entry.Data.LongLength)
return;
while (position > entry.Position)
{
int read = entry.Stream.Read(entry.Data, (int)entry.Position, (int)(position - entry.Position));
entry.Position += read;
}
if (entry.Position == entry.Data.LongLength)
{
entry.Stream.Close();
entry.Stream = null;
entry.ZipEntry = null;
ReleaseZipFileReference(entry.ZipFile.Path);
entry.ZipFile = null;
}
}
