public ZipOutputStream(Stream baseOutputStream)
: base(baseOutputStream, new Deflater(Deflater.DEFAULT_COMPRESSION, true))
{
this.entries = new ArrayList();
this.crc = new Crc32();
this.curEntry = null;
this.offset = 0;
this.zipComment = new byte[0];
this.defaultMethod = 8;
this.shouldWriteBack = false;
this.seekPos = -1;
}
public GZipOutputStream(Stream baseOutputStream, int size)
: base(baseOutputStream, new Deflater(Deflater.DEFAULT_COMPRESSION, true), size)
{
this.crc = new Crc32();
int num = (int) (DateTime.Now.Ticks / 0x2710);
byte[] buffer2 = new byte[10];
buffer2[0] = (byte) (GZipConstants.GZIP_MAGIC >> 8);
buffer2[1] = (byte) GZipConstants.GZIP_MAGIC;
buffer2[2] = (byte) Deflater.DEFLATED;
buffer2[4] = (byte) num;
buffer2[5] = (byte) (num >> 8);
buffer2[6] = (byte) (num >> 0x10);
buffer2[7] = (byte) (num >> 0x18);
buffer2[9] = 0xff;
byte[] buffer = buffer2;
baseOutputStream.Write(buffer, 0, buffer.Length);
}
private void ReadHeader()
{
Crc32 crc = new Crc32();
int bval = base.baseInputStream.ReadByte();
if (bval < 0)
{
this.eos = true;
}
else
{
crc.Update(bval);
if (bval != (GZipConstants.GZIP_MAGIC >> 8))
{
throw new IOException("Error baseInputStream GZIP header, first byte doesn't match");
}
bval = base.baseInputStream.ReadByte();
if (bval != (GZipConstants.GZIP_MAGIC & 0xff))
{
throw new IOException("Error baseInputStream GZIP header, second byte doesn't match");
}
crc.Update(bval);
int num2 = base.baseInputStream.ReadByte();
if (num2 != 8)
{
throw new IOException("Error baseInputStream GZIP header, data not baseInputStream deflate format");
}
crc.Update(num2);
int num3 = base.baseInputStream.ReadByte();
if (num3 < 0)
{
throw new Exception("Early EOF baseInputStream GZIP header");
}
crc.Update(num3);
if ((num3 & 0xd0) != 0)
{
throw new IOException("Reserved flag bits baseInputStream GZIP header != 0");
}
for (int i = 0; i < 6; i++)
{
int num5 = base.baseInputStream.ReadByte();
if (num5 < 0)
{
throw new Exception("Early EOF baseInputStream GZIP header");
}
crc.Update(num5);
}
if ((num3 & 4) != 0)
{
for (int j = 0; j < 2; j++)
{
int num7 = base.baseInputStream.ReadByte();
if (num7 < 0)
{
throw new Exception("Early EOF baseInputStream GZIP header");
}
crc.Update(num7);
}
if ((base.baseInputStream.ReadByte() < 0) || (base.baseInputStream.ReadByte() < 0))
{
throw new Exception("Early EOF baseInputStream GZIP header");
}
int num8 = base.baseInputStream.ReadByte();
int num9 = base.baseInputStream.ReadByte();
if ((num8 < 0) || (num9 < 0))
{
throw new Exception("Early EOF baseInputStream GZIP header");
}
crc.Update(num8);
crc.Update(num9);
int num10 = (num8 << 8) | num9;
for (int k = 0; k < num10; k++)
{
int num12 = base.baseInputStream.ReadByte();
if (num12 < 0)
{
throw new Exception("Early EOF baseInputStream GZIP header");
}
crc.Update(num12);
}
}
if ((num3 & 8) != 0)
{
int num13;
while ((num13 = base.baseInputStream.ReadByte()) > 0)
{
crc.Update(num13);
}
if (num13 < 0)
{
throw new Exception("Early EOF baseInputStream GZIP file name");
}
crc.Update(num13);
}
if ((num3 & 0x10) != 0)
{
int num14;
while ((num14 = base.baseInputStream.ReadByte()) > 0)
{
crc.Update(num14);
}
if (num14 < 0)
{
throw new Exception("Early EOF baseInputStream GZIP comment");
}
crc.Update(num14);
}
if ((num3 & 2) != 0)
{
int num16 = base.baseInputStream.ReadByte();
if (num16 < 0)
{
throw new Exception("Early EOF baseInputStream GZIP header");
}
int num15 = base.baseInputStream.ReadByte();
if (num15 < 0)
{
throw new Exception("Early EOF baseInputStream GZIP header");
}
num16 = (num16 << 8) | num15;
if (num16 != (((int) crc.Value) & 0xffff))
{
throw new IOException("Header CRC value mismatch");
}
}
this.readGZIPHeader = true;
}
}
public GZipInputStream(Stream baseInputStream, int size)
: base(baseInputStream, new Inflater(true), size)
{
this.crc = new Crc32();
}
public override void Close()
{
base.Close();
this.crc = null;
this.entry = null;
}
public ZipInputStream(Stream baseInputStream)
: base(baseInputStream, new Inflater(true))
{
this.crc = new Crc32();
this.entry = null;
}