ObjFW  Diff

#import "OFStream.h"
#import "OFDate.h"

@class OFInflateStream;

OF_ASSUME_NONNULL_BEGIN

/*!
 * @class OFGZIPStream OFGZIPStream.h ObjFW/OFGZIPStream.h
 *
 * @brief A class that handles GZIP compression and decompression transparently
 *	  for an underlying stream.
 */
@interface OFGZIPStream: OFStream
{
	OFStream *_stream;
	OFInflateStream *_inflateStream;
	OFInflateStream *_Nullable _inflateStream;
	enum of_gzip_stream_state {
		OF_GZIP_STREAM_ID1,
		OF_GZIP_STREAM_ID2,
		OF_GZIP_STREAM_COMPRESSION_METHOD,
		OF_GZIP_STREAM_FLAGS,
		OF_GZIP_STREAM_MODIFICATION_TIME,
		OF_GZIP_STREAM_EXTRA_FLAGS,

		OF_GZIP_STREAM_OS_NTFS	       =  11,
		OF_GZIP_STREAM_OS_QDOS	       =  12,
		OF_GZIP_STREAM_OS_ACORN_RISCOS =  13,
		OF_GZIP_STREAM_OS_UNKNOWN      = 255
	} _OS;
	size_t _bytesRead;
	uint8_t _buffer[4];
	OFDate *_modificationDate;
	OFDate *_Nullable _modificationDate;
	uint16_t _extraLength;
	uint32_t _CRC32, _uncompressedSize;
}

/*!
 * @brief Creates a new OFGZIPStream with the specified underlying stream.
 *
 * @param stream The underlying stream for the OFGZIPStream
 * @return A new, autoreleased OFGZIPStream
 */
+ (instancetype)streamWithStream: (OFStream *)stream;

- init OF_UNAVAILABLE;

/*!
 * @brief Initializes an already allocated OFGZIPStream with the specified
 *	  underlying stream.
 *
 * @param stream The underlying stream for the OFGZIPStream
 * @return An initialized OFGZIPStream
 */
- initWithStream: (OFStream *)stream OF_DESIGNATED_INITIALIZER;
@end

OF_ASSUME_NONNULL_END