public ZipOutputStream(Stream baseOutputStream, int bufferSize)
: base(baseOutputStream, new Deflater(-1, true), bufferSize)
{
_entries = new ArrayList();
_crc = new Crc32();
_defaultCompressionLevel = -1;
_curMethod = CompressionMethod.Deflated;
_zipComment = new byte[0];
_crcPatchPos = -1L;
_sizePatchPos = -1L;
_useZip64 = UseZip64.Dynamic;
}
public GZipOutputStream(Stream baseOutputStream, int size = 0x1000)
: base(baseOutputStream, new Deflater(-1, true), size)
{
_crc = new Crc32();
}
public ZipInputStream(Stream baseInputStream, int bufferSize)
: base(baseInputStream, new Inflater(true), bufferSize)
{
_crc = new Crc32();
_internalReader = ReadingNotAvailable;
}
private bool ReadHeader()
{
_crc = new Crc32();
if (InputBuffer.Available <= 0)
{
InputBuffer.Fill();
if (InputBuffer.Available <= 0)
{
return false;
}
}
Crc32 crc32 = new Crc32();
int num = InputBuffer.ReadLeByte();
if (num < 0)
{
throw new EndOfStreamException("EOS reading GZIP header");
}
crc32.Update(num);
if (num != 0x1f)
{
throw new GZipException("Error GZIP header, first magic byte doesn't match");
}
num = InputBuffer.ReadLeByte();
if (num < 0)
{
throw new EndOfStreamException("EOS reading GZIP header");
}
if (num != 0x8b)
{
throw new GZipException("Error GZIP header, second magic byte doesn't match");
}
crc32.Update(num);
int num2 = InputBuffer.ReadLeByte();
if (num2 < 0)
{
throw new EndOfStreamException("EOS reading GZIP header");
}
if (num2 != 8)
{
throw new GZipException("Error GZIP header, data not in deflate format");
}
crc32.Update(num2);
int num3 = InputBuffer.ReadLeByte();
if (num3 < 0)
{
throw new EndOfStreamException("EOS reading GZIP header");
}
crc32.Update(num3);
if ((num3 & 0xe0) != 0)
{
throw new GZipException("Reserved flag bits in GZIP header != 0");
}
for (int i = 0; i < 6; i++)
{
int num5 = InputBuffer.ReadLeByte();
if (num5 < 0)
{
throw new EndOfStreamException("EOS reading GZIP header");
}
crc32.Update(num5);
}
if ((num3 & 4) != 0)
{
for (int j = 0; j < 2; j++)
{
int num7 = InputBuffer.ReadLeByte();
if (num7 < 0)
{
throw new EndOfStreamException("EOS reading GZIP header");
}
crc32.Update(num7);
}
if ((InputBuffer.ReadLeByte() < 0) || (InputBuffer.ReadLeByte() < 0))
{
throw new EndOfStreamException("EOS reading GZIP header");
}
int num8 = InputBuffer.ReadLeByte();
int num9 = InputBuffer.ReadLeByte();
if ((num8 < 0) || (num9 < 0))
{
throw new EndOfStreamException("EOS reading GZIP header");
}
crc32.Update(num8);
crc32.Update(num9);
int num10 = (num8 << 8) | num9;
for (int k = 0; k < num10; k++)
{
int num12 = InputBuffer.ReadLeByte();
if (num12 < 0)
{
throw new EndOfStreamException("EOS reading GZIP header");
}
crc32.Update(num12);
}
}
if ((num3 & 8) != 0)
{
int num13;
while ((num13 = InputBuffer.ReadLeByte()) > 0)
{
crc32.Update(num13);
}
if (num13 < 0)
{
throw new EndOfStreamException("EOS reading GZIP header");
}
crc32.Update(num13);
}
if ((num3 & GZipConstants.FCOMMENT) != 0)
{
int num14;
while ((num14 = InputBuffer.ReadLeByte()) > 0)
{
crc32.Update(num14);
}
if (num14 < 0)
{
throw new EndOfStreamException("EOS reading GZIP header");
}
crc32.Update(num14);
}
if ((num3 & 2) != 0)
{
int num16 = InputBuffer.ReadLeByte();
if (num16 < 0)
{
throw new EndOfStreamException("EOS reading GZIP header");
}
int num15 = InputBuffer.ReadLeByte();
if (num15 < 0)
{
throw new EndOfStreamException("EOS reading GZIP header");
}
num16 = (num16 << 8) | num15;
if (num16 != (((int)crc32.Value) & 0xffff))
{
throw new GZipException("Header CRC value mismatch");
}
}
_readGzipHeader = true;
return true;
}
public override void Close()
{
_internalReader = ReadingNotAvailable;
_crc = null;
_entry = null;
base.Close();
}