Inheritance diagram for SprStreamGZip:

Collaboration diagram for SprStreamGZip:

Data Fields
base::< SprStream >	base

base::< SprStream > *	fdc

off_t	pos

int	rv

int	zflush

z_stream	zbuf

gz_header	hdr

uintptr_t	aux_buf [(SPR_STREAM_BUF_SZ+SPR_STREAM_UNGET_SZ+sizeof(uintptr_t)-1)/sizeof(uintptr_t)]

Data Fields inherited from SprStream
base::< SprObject >	interface_

const uint8_t *restrict	buf_rptr

uint8_t *restrict	buf_wptr

const uint8_t *spr_readonly	buf_end

unsigned int	buf_size

spr_readonly int	err

spr_readonly int	eof

SprKeySet *	keys

const char *	fname

Protected Member Functions
virtual const uint8_t *	buf_fill (public:SprStreamGZip *restrict fd, int min_fill)

virtual uint8_t *	buf_flush (public:SprStreamGZip *restrict fd)

virtual int	switch2read (SprStreamGZip *restrict fd)

virtual int	switch2write (SprStreamGZip *restrict fd)

virtual off_t	seek (SprStreamGZip *restrict fd, off_t offset, int mode)

virtual off_t	tell (SprStreamGZip *restrict fd)

Protected Member Functions inherited from SprStream
virtual const uint8_t *	buf_fill (public:SprStream *restrict fd, int min_fill)

virtual uint8_t *	buf_flush (public:SprStream *restrict fd)

virtual size_t	ebuf_read (public:SprStream restrict fd, void restrict buf, size_t size)

virtual int	ebuf_write (public:SprStream restrict fd, const void restrict buf, size_t size)

virtual size_t	read (SprStream restrict fd, void restrict buf, size_t size)

virtual int	write (SprStream restrict fd, const void restrict buf, size_t size)

virtual size_t	skip (SprStream *restrict fd, size_t size)

virtual int	fill (SprStream *restrict fd, int chr, size_t size)

virtual int	switch2read (SprStream *restrict fd)

virtual int	switch2write (SprStream *restrict fd)

virtual off_t	seek (SprStream *restrict fd, off_t offset, int mode)

virtual off_t	tell (SprStream *restrict fd)

virtual int	align (SprStream *restrict fd)

Additional Inherited Members
Protected Attributes inherited from SprStream
uint8_t *	buf_start

unsigned int	flags

int	mode

size_t	rdim2

SprStream_buf_fill	buf_fill

SprStream_buf_flush	buf_flush

SprStream_ebuf_read	ebuf_read

SprStream_ebuf_write	ebuf_write

Detailed Description

A stream object that provides transparent compression or decompression using the zlib library (and gzip headers).

Backward seeks are extremely slow.

A stream cannot be opened for both reading and writing.

Member Function Documentation

virtual const uint8_t* SprStreamGZip::buf_fill	(	public:SprStreamGZip *restrict	fd,
		int	min_fill
	)

protectedvirtual

virtual uint8_t* SprStreamGZip::buf_flush ( public:SprStreamGZip *restrict fd )

protectedvirtual

virtual int SprStreamGZip::switch2read ( SprStreamGZip *restrict fd )

protectedvirtual

virtual int SprStreamGZip::switch2write ( SprStreamGZip *restrict fd )

protectedvirtual

virtual off_t SprStreamGZip::seek	(	SprStreamGZip *restrict	fd,
		off_t	offset,
		int	mode
	)

protectedvirtual

virtual off_t SprStreamGZip::tell ( SprStreamGZip *restrict fd )

protectedvirtual

base::<SprStream> SprStreamGZip::base

base::<SprStream> * SprStreamGZip::fdc

the stream where the compressed data comes from / goes to

off_t SprStreamGZip::pos

file position
zlib isn't guaranteed to use 64bits counters

int SprStreamGZip::rv

last return value of the inflate()/deflate() routine

int SprStreamGZip::zflush

flush mode for inflate() / deflate()

z_stream SprStreamGZip::zbuf

gz_header SprStreamGZip::hdr

uintptr_t SprStreamGZip::aux_buf[(SPR_STREAM_BUF_SZ+SPR_STREAM_UNGET_SZ+sizeof(uintptr_t)-1)/sizeof(uintptr_t)]