private int _ExtractOne(Stream output)
{
lock (_streamLock)
{
Stream input = this.ArchiveStream;
input.Seek(this.__FileDataPosition, SeekOrigin.Begin);
byte[] bytes = new byte[0x2200];
int LeftToRead = (this.CompressionMethod == 8) ? this.UncompressedSize : this._CompressedFileDataSize;
Stream input3 = (this.CompressionMethod == 8) ? new DeflateStream(input, CompressionMode.Decompress, true) : input;
using (CrcCalculatorStream s1 = new CrcCalculatorStream(input3))
{
while (LeftToRead > 0)
{
int len = (LeftToRead > bytes.Length) ? bytes.Length : LeftToRead;
int n = s1.Read(bytes, 0, len);
this._CheckRead(n);
output.Write(bytes, 0, n);
LeftToRead -= n;
}
return s1.Crc32;
}
}
}
private void _WriteFileData(Stream s)
{
Stream input = null;
CrcCalculatorStream input1 = null;
CountingStream counter = null;
try
{
this.__FileDataPosition = s.Position;
}
catch
{
}
try
{
if (this._sourceStream != null)
{
this._sourceStream.Position = 0L;
input = this._sourceStream;
}
else
{
input = File.OpenRead(this.LocalFileName);
}
input1 = new CrcCalculatorStream(input);
counter = new CountingStream(s);
Stream output1 = counter;
Stream output2 = null;
bool mustCloseDeflateStream = false;
if (this.CompressionMethod == 8)
{
output2 = new DeflateStream(output1, CompressionMode.Compress, true);
mustCloseDeflateStream = true;
}
else
{
output2 = output1;
}
byte[] buffer = new byte[0x2200];
for (int n = input1.Read(buffer, 0, 0x2200); n > 0; n = input1.Read(buffer, 0, 0x2200))
{
output2.Write(buffer, 0, n);
}
if (mustCloseDeflateStream)
{
output2.Close();
}
}
finally
{
if ((this._sourceStream == null) && (input != null))
{
input.Close();
input.Dispose();
}
}
this._UncompressedSize = input1.TotalBytesSlurped;
this._CompressedSize = counter.BytesWritten;
this._Crc32 = input1.Crc32;
int i = 8;
this._EntryHeader[i++] = (byte) (this.CompressionMethod & 0xff);
this._EntryHeader[i++] = (byte) ((this.CompressionMethod & 0xff00) >> 8);
i = 14;
this._EntryHeader[i++] = (byte) (this._Crc32 & 0xff);
this._EntryHeader[i++] = (byte) ((this._Crc32 & 0xff00) >> 8);
this._EntryHeader[i++] = (byte) ((this._Crc32 & 0xff0000) >> 0x10);
this._EntryHeader[i++] = (byte) ((this._Crc32 & 0xff000000L) >> 0x18);
this._EntryHeader[i++] = (byte) (this._CompressedSize & 0xff);
this._EntryHeader[i++] = (byte) ((this._CompressedSize & 0xff00) >> 8);
this._EntryHeader[i++] = (byte) ((this._CompressedSize & 0xff0000) >> 0x10);
this._EntryHeader[i++] = (byte) ((this._CompressedSize & 0xff000000L) >> 0x18);
this._EntryHeader[i++] = (byte) (this._UncompressedSize & 0xff);
this._EntryHeader[i++] = (byte) ((this._UncompressedSize & 0xff00) >> 8);
this._EntryHeader[i++] = (byte) ((this._UncompressedSize & 0xff0000) >> 0x10);
this._EntryHeader[i++] = (byte) ((this._UncompressedSize & 0xff000000L) >> 0x18);
if (s.CanSeek)
{
s.Seek((long) this._RelativeOffsetOfHeader, SeekOrigin.Begin);
s.Write(this._EntryHeader, 0, this._EntryHeader.Length);
CountingStream s1 = s as CountingStream;
if (s1 != null)
{
s1.Adjust(this._EntryHeader.Length);
}
s.Seek((long) this._CompressedSize, SeekOrigin.Current);
}
else
{
if ((this._BitField & 8) != 8)
{
throw new ZipException("Logic error.");
}
byte[] Descriptor = new byte[0x10];
i = 0;
int sig = 0x8074b50;
Descriptor[i++] = (byte) (sig & 0xff);
Descriptor[i++] = (byte) ((sig & 0xff00) >> 8);
Descriptor[i++] = (byte) ((sig & 0xff0000) >> 0x10);
Descriptor[i++] = (byte) ((sig & 0xff000000L) >> 0x18);
Descriptor[i++] = (byte) (this._Crc32 & 0xff);
Descriptor[i++] = (byte) ((this._Crc32 & 0xff00) >> 8);
Descriptor[i++] = (byte) ((this._Crc32 & 0xff0000) >> 0x10);
Descriptor[i++] = (byte) ((this._Crc32 & 0xff000000L) >> 0x18);
Descriptor[i++] = (byte) (this._CompressedSize & 0xff);
Descriptor[i++] = (byte) ((this._CompressedSize & 0xff00) >> 8);
Descriptor[i++] = (byte) ((this._CompressedSize & 0xff0000) >> 0x10);
Descriptor[i++] = (byte) ((this._CompressedSize & 0xff000000L) >> 0x18);
Descriptor[i++] = (byte) (this._UncompressedSize & 0xff);
Descriptor[i++] = (byte) ((this._UncompressedSize & 0xff00) >> 8);
Descriptor[i++] = (byte) ((this._UncompressedSize & 0xff0000) >> 0x10);
Descriptor[i++] = (byte) ((this._UncompressedSize & 0xff000000L) >> 0x18);
s.Write(Descriptor, 0, Descriptor.Length);
}
}
