public override int Read()

in src/ICSharpCode.SharpZipLib/GZip/GzipInputStream.cs [106:153]
33 lines of code
11 McCabe index (conditional complexity)

		public override int Read(byte[] buffer, int offset, int count)
		{
			// A GZIP file can contain multiple blocks of compressed data, although this is quite rare.
			// A compressed block could potentially be empty, so we need to loop until we reach EOF or
			// we find data.
			while (true)
			{
				// If we haven't read the header for this block, read it
				if (!readGZIPHeader)
				{
					// Try to read header. If there is no header (0 bytes available), this is EOF. If there is
					// an incomplete header, this will throw an exception.
					try
					{
						if (!ReadHeader())
						{
							return 0;
						}
					}
					catch (Exception ex) when (completedLastBlock && (ex is GZipException || ex is EndOfStreamException))
					{
						// if we completed the last block (i.e. we're in a stream that has multiple blocks concatenated
						// we want to return gracefully from any header parsing exceptions since sometimes there may
						// be trailing garbage on a stream
						return 0;
					}
				}

				// Try to read compressed data
				int bytesRead = base.Read(buffer, offset, count);
				if (bytesRead > 0)
				{
					crc.Update(new ArraySegment<byte>(buffer, offset, bytesRead));
				}

				// If this is the end of stream, read the footer
				if (inf.IsFinished)
				{
					ReadFooter();
				}

				// Attempting to read 0 bytes will never yield any bytesRead, so we return instead of looping forever
				if (bytesRead > 0 || count == 0)
				{
					return bytesRead;
				}
			}
		}