/// <summary>
/// Opens a file inside the archive for reading without actually
/// extracting the file to disk.
/// </summary>
/// <param name="fileName">The name of the file in the archive. Also
/// includes the internal path of the file, if any. File name matching
/// is case-insensitive.</param>
/// <returns>
/// A stream for reading directly from the packed file. Like any stream
/// this should be closed/disposed as soon as it is no longer needed.
/// </returns>
internal Stream OpenRead(string fileName)
{
Stream archiveStream = File.OpenRead(this.FullName);
CompressionEngine compressionEngine = this.CreateCompressionEngine();
Stream fileStream = compressionEngine.Unpack(archiveStream, fileName);
// Attach the archiveStream and compressionEngine to the
// fileStream so they get disposed when the fileStream is disposed.
return(new CargoStream(fileStream, archiveStream, compressionEngine));
}
internal void Unpack(
string destDirectory,
EventHandler <ArchiveProgressEventArgs> progressHandler)
{
using (CompressionEngine compressionEngine = this.CreateCompressionEngine())
{
compressionEngine.Progress += progressHandler;
ArchiveFileStreamContext streamContext =
new ArchiveFileStreamContext(this.FullName, destDirectory, null);
streamContext.EnableOffsetOpen = true;
compressionEngine.Unpack(streamContext, null);
}
}
internal void UnpackFileSet(
IDictionary <string, string> fileNames,
string destDirectory,
EventHandler <ArchiveProgressEventArgs> progressHandler)
{
if (fileNames == null)
{
throw new ArgumentNullException("fileNames");
}
using (CompressionEngine compressionEngine = this.CreateCompressionEngine())
{
compressionEngine.Progress += progressHandler;
ArchiveFileStreamContext streamContext =
new ArchiveFileStreamContext(this.FullName, destDirectory, fileNames);
streamContext.EnableOffsetOpen = true;
compressionEngine.Unpack(
streamContext,
delegate(string match)
{
return(fileNames.ContainsKey(match));
});
}
}
