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#import "OFStream.h"
#import "OFDate.h"
@class OFInflateStream;
OF_ASSUME_NONNULL_BEGIN
/**
* @brief The operating system on which compressed the data.
*/
typedef enum {
OFGZIPStreamOperatingSystemFAT = 0,
OFGZIPStreamOperatingSystemAmiga = 1,
OFGZIPStreamOperatingSystemVMS = 2,
OFGZIPStreamOperatingSystemUNIX = 3,
OFGZIPStreamOperatingSystemVM_CMS = 4,
OFGZIPStreamOperatingSystemAtariTOS = 5,
OFGZIPStreamOperatingSystemHPFS = 6,
OFGZIPStreamOperatingSystemMacintosh = 7,
OFGZIPStreamOperatingSystemZSystem = 8,
OFGZIPStreamOperatingSystemCPM = 9,
OFGZIPStreamOperatingSystemTOPS20 = 10,
OFGZIPStreamOperatingSystemNTFS = 11,
OFGZIPStreamOperatingSystemQDO = 12,
OFGZIPStreamOperatingSystemAcornRISCOS = 13,
OFGZIPStreamOperatingSystemUnknown = 255
} OFGZIPStreamOperatingSystem;
/**
* @class OFGZIPStream OFGZIPStream.h ObjFW/OFGZIPStream.h
*
* @brief A class that handles GZIP compression and decompression transparently
* for an underlying stream.
*/
OF_SUBCLASSING_RESTRICTED
@interface OFGZIPStream: OFStream
{
OFStream *_stream;
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_OPERATING_SYSTEM,
OF_GZIP_STREAM_EXTRA_LENGTH,
OF_GZIP_STREAM_EXTRA,
OF_GZIP_STREAM_NAME,
OF_GZIP_STREAM_COMMENT,
OF_GZIP_STREAM_HEADER_CRC16,
OF_GZIP_STREAM_DATA,
OF_GZIP_STREAM_CRC32,
OF_GZIP_STREAM_UNCOMPRESSED_SIZE
enum {
OFGZIPStreamStateID1,
OFGZIPStreamStateID2,
OFGZIPStreamStateCompressionMethod,
OFGZIPStreamStateFlags,
OFGZIPStreamStateModificationDate,
OFGZIPStreamStateExtraFlags,
OFGZIPStreamStateOperatingSystem,
OFGZIPStreamStateExtraLength,
OFGZIPStreamStateExtra,
OFGZIPStreamStateName,
OFGZIPStreamStateComment,
OFGZIPStreamStateHeaderCRC16,
OFGZIPStreamStateData,
OFGZIPStreamStateCRC32,
OFGZIPStreamStateUncompressedSize
} _state;
enum of_gzip_stream_flags {
OF_GZIP_STREAM_FLAG_TEXT = 0x01,
OF_GZIP_STREAM_FLAG_HEADER_CRC16 = 0x02,
OF_GZIP_STREAM_FLAG_EXTRA = 0x04,
OF_GZIP_STREAM_FLAG_NAME = 0x08,
OF_GZIP_STREAM_FLAG_COMMENT = 0x10
enum {
OFGZIPStreamFlagText = 0x01,
OFGZIPStreamFlagHeaderCRC16 = 0x02,
OFGZIPStreamFlagExtra = 0x04,
OFGZIPStreamFlagName = 0x08,
OFGZIPStreamFlagComment = 0x10
} _flags;
uint8_t _extraFlags;
enum of_gzip_stream_operating_system {
OF_GZIP_STREAM_OPERATING_SYSTEM_FAT = 0,
OF_GZIP_STREAM_OPERATING_SYSTEM_AMIGA = 1,
OF_GZIP_STREAM_OPERATING_SYSTEM_VMS = 2,
OF_GZIP_STREAM_OPERATING_SYSTEM_UNIX = 3,
OF_GZIP_STREAM_OPERATING_SYSTEM_VM_CMS = 4,
OF_GZIP_STREAM_OPERATING_SYSTEM_ATARI_TOS = 5,
OF_GZIP_STREAM_OPERATING_SYSTEM_HPFS = 6,
OF_GZIP_STREAM_OPERATING_SYSTEM_MACINTOSH = 7,
OF_GZIP_STREAM_OPERATING_SYSTEM_Z_SYSTEM = 8,
OF_GZIP_STREAM_OPERATING_SYSTEM_CP_M = 9,
OF_GZIP_STREAM_OPERATING_SYSTEM_TOPS_20 = 10,
OF_GZIP_STREAM_OPERATING_SYSTEM_NTFS = 11,
OF_GZIP_STREAM_OPERATING_SYSTEM_QDO = 12,
OF_GZIP_STREAM_OPERATING_SYSTEM_ACORN_RISC_OS = 13,
OF_GZIP_STREAM_OPERATING_SYSTEM_UNKNOWN = 255
} _operatingSystemMadeOn;
enum of_gzip_stream_operating_system operatingSystemMadeOn;
OFGZIPStreamOperatingSystem operatingSystemMadeOn;
/**
* @brief The modification date of the original file.
*
* This property is only guaranteed to be available once @ref atEndOfStream is
* true.
*/
@property OF_NULLABLE_PROPERTY (readonly, nonatomic) OFDate *modificationDate;
/**
* @brief Creates a new OFGZIPStream with the specified underlying stream.
*
* @param stream The underlying stream for the OFGZIPStream
* @param mode The mode for the OFGZIPStream. Valid modes are "r" for reading
* and "w" for writing.
* @return A new, autoreleased OFGZIPStream
*/
+ (instancetype)streamWithStream: (OFStream *)stream
+ (instancetype)streamWithStream: (OFStream *)stream mode: (OFString *)mode;
mode: (OFString *)mode;
|