/// <summary>
/// Decompresses bytes for one file from an archive or archive chain,
/// checking the crc at the end.
/// </summary>
private void UnpackFileBytes(
IUnpackStreamContext streamContext,
string fileName,
long compressedSize,
long uncompressedSize,
uint crc,
Stream fileStream,
Converter <Stream, Stream> compressionStreamCreator,
ref Stream archiveStream)
{
CrcStream crcStream = new CrcStream(fileStream);
ConcatStream concatStream = new ConcatStream(
delegate(ConcatStream s)
{
this.currentArchiveBytesProcessed = s.Source.Position;
streamContext.CloseArchiveReadStream(
this.currentArchiveNumber,
String.Empty,
s.Source);
this.currentArchiveNumber--;
this.OnProgress(ArchiveProgressType.FinishArchive);
this.currentArchiveNumber += 2;
this.currentArchiveName = null;
this.currentArchiveBytesProcessed = 0;
this.currentArchiveTotalBytes = 0;
s.Source = this.OpenArchive(streamContext, this.currentArchiveNumber);
FileStream archiveFileStream = s.Source as FileStream;
this.currentArchiveName = (archiveFileStream != null ?
Path.GetFileName(archiveFileStream.Name) : null);
this.currentArchiveTotalBytes = s.Source.Length;
this.currentArchiveNumber--;
this.OnProgress(ArchiveProgressType.StartArchive);
this.currentArchiveNumber++;
});
concatStream.Source = archiveStream;
concatStream.SetLength(compressedSize);
Stream decompressionStream = compressionStreamCreator(concatStream);
try
{
byte[] buf = new byte[4096];
long bytesRemaining = uncompressedSize;
int counter = 0;
while (bytesRemaining > 0)
{
int count = (int)Math.Min(buf.Length, bytesRemaining);
count = decompressionStream.Read(buf, 0, count);
crcStream.Write(buf, 0, count);
bytesRemaining -= count;
this.fileBytesProcessed += count;
this.currentFileBytesProcessed += count;
this.currentArchiveBytesProcessed = concatStream.Source.Position;
if (++counter % 16 == 0) // Report every 64K
{
this.currentArchiveNumber--;
this.OnProgress(ArchiveProgressType.PartialFile);
this.currentArchiveNumber++;
}
}
}
finally
{
archiveStream = concatStream.Source;
}
crcStream.Flush();
if (crcStream.Crc != crc)
{
throw new ZipException("CRC check failed for file: " + fileName);
}
}
/// <summary>
/// Decompresses bytes for one file from an archive or archive chain,
/// checking the crc at the end.
/// </summary>
private void UnpackFileBytes(
IUnpackStreamContext streamContext,
string fileName,
long compressedSize,
long uncompressedSize,
uint crc,
Stream fileStream,
Converter<Stream, Stream> compressionStreamCreator,
ref Stream archiveStream)
{
CrcStream crcStream = new CrcStream(fileStream);
ConcatStream concatStream = new ConcatStream(
delegate(ConcatStream s)
{
this.currentArchiveBytesProcessed = s.Source.Position;
streamContext.CloseArchiveReadStream(
this.currentArchiveNumber,
String.Empty,
s.Source);
this.currentArchiveNumber--;
this.OnProgress(ArchiveProgressType.FinishArchive);
this.currentArchiveNumber += 2;
this.currentArchiveName = null;
this.currentArchiveBytesProcessed = 0;
this.currentArchiveTotalBytes = 0;
s.Source = this.OpenArchive(streamContext, this.currentArchiveNumber);
FileStream archiveFileStream = s.Source as FileStream;
this.currentArchiveName = (archiveFileStream != null ?
Path.GetFileName(archiveFileStream.Name) : null);
this.currentArchiveTotalBytes = s.Source.Length;
this.currentArchiveNumber--;
this.OnProgress(ArchiveProgressType.StartArchive);
this.currentArchiveNumber++;
});
concatStream.Source = archiveStream;
concatStream.SetLength(compressedSize);
Stream decompressionStream = compressionStreamCreator(concatStream);
try
{
byte[] buf = new byte[4096];
long bytesRemaining = uncompressedSize;
int counter = 0;
while (bytesRemaining > 0)
{
int count = (int) Math.Min(buf.Length, bytesRemaining);
count = decompressionStream.Read(buf, 0, count);
crcStream.Write(buf, 0, count);
bytesRemaining -= count;
this.fileBytesProcessed += count;
this.currentFileBytesProcessed += count;
this.currentArchiveBytesProcessed = concatStream.Source.Position;
if (++counter % 16 == 0) // Report every 64K
{
this.currentArchiveNumber--;
this.OnProgress(ArchiveProgressType.PartialFile);
this.currentArchiveNumber++;
}
}
}
finally
{
archiveStream = concatStream.Source;
}
crcStream.Flush();
if (crcStream.Crc != crc)
{
throw new ZipException("CRC check failed for file: " + fileName);
}
}