zypp::gzstream_detail::gzstreambufimpl Class Reference

Streambuffer reading or writing gzip files. More...

#include <base/gzstream.h>

Public Types
using	error_type = ZlibError

Public Member Functions
	~gzstreambufimpl ()
bool	isOpen () const
bool	canRead () const
bool	canWrite () const
bool	canSeek (std::ios_base::seekdir way_r) const
error_type	error () const
	The last error returned fron zlib.
std::streamsize	readData (char *buffer_r, std::streamsize maxcount_r)
bool	writeData (const char *buffer_r, std::streamsize count_r)
off_t	seekTo (off_t off_r, std::ios_base::seekdir way_r, std::ios_base::openmode omode_r)
off_t	tell () const

Protected Member Functions
bool	openImpl (const char *name_r, std::ios_base::openmode mode_r)
bool	closeImpl ()
off_t	compressed_tell () const
	Tell the file position in the compressed file.

Private Member Functions
void	setZError () const

Private Attributes
int	_fd = -1
	file descriptor of the compressed file
gzFile	_file = nullptr
std::ios_base::openmode	_mode = std::ios_base::openmode(0)
ZlibError	_error

Detailed Description

Streambuffer reading or writing gzip files.

Read and write mode are mutual exclusive. Seek is supported, but zlib restrictions appy (only forward seek in write mode; backward seek in read mode might be expensive).Putback is not supported.

Reading plain (no gziped) files is possible as well.

This streambuf is used in ifgzstream and ofgzstream.

Definition at line 90 of file gzstream.h.

Member Typedef Documentation

error_type

using zypp::gzstream_detail::gzstreambufimpl::error_type = ZlibError

Definition at line 93 of file gzstream.h.

Constructor & Destructor Documentation

~gzstreambufimpl()

zypp::gzstream_detail::gzstreambufimpl::~gzstreambufimpl ( )

inline

Definition at line 95 of file gzstream.h.

Member Function Documentation

isOpen()

bool zypp::gzstream_detail::gzstreambufimpl::isOpen ( ) const

inline

Definition at line 99 of file gzstream.h.

canRead()

bool zypp::gzstream_detail::gzstreambufimpl::canRead ( ) const

inline

Definition at line 103 of file gzstream.h.

canWrite()

bool zypp::gzstream_detail::gzstreambufimpl::canWrite ( ) const

inline

Definition at line 107 of file gzstream.h.

canSeek()

bool zypp::gzstream_detail::gzstreambufimpl::canSeek ( std::ios_base::seekdir  way_r ) const

inline

Definition at line 111 of file gzstream.h.

openImpl()

bool zypp::gzstream_detail::gzstreambufimpl::openImpl ( const char *  name_r, std::ios_base::openmode  mode_r  )

protected

Definition at line 74 of file gzstream.cc.

closeImpl()

bool zypp::gzstream_detail::gzstreambufimpl::closeImpl ( )

protected

Definition at line 110 of file gzstream.cc.

compressed_tell()

off_t zypp::gzstream_detail::gzstreambufimpl::compressed_tell ( ) const

protected

Tell the file position in the compressed file.

Analogous to tell(2), complementary to gztell.

Definition at line 197 of file gzstream.cc.

error()

error_type zypp::gzstream_detail::gzstreambufimpl::error ( ) const

inline

The last error returned fron zlib.

Definition at line 127 of file gzstream.h.

readData()

std::streamsize zypp::gzstream_detail::gzstreambufimpl::readData	(	char *	buffer_r,
		std::streamsize	maxcount_r
	)

Definition at line 143 of file gzstream.cc.

writeData()

bool zypp::gzstream_detail::gzstreambufimpl::writeData	(	const char *	buffer_r,
		std::streamsize	count_r
	)

Definition at line 157 of file gzstream.cc.

seekTo()

off_t zypp::gzstream_detail::gzstreambufimpl::seekTo	(	off_t	off_r,
		std::ios_base::seekdir	way_r,
		std::ios_base::openmode	omode_r
	)

Definition at line 174 of file gzstream.cc.

tell()

off_t zypp::gzstream_detail::gzstreambufimpl::tell

(

)

const

Definition at line 188 of file gzstream.cc.

setZError()

void zypp::gzstream_detail::gzstreambufimpl::setZError ( ) const

inlineprivate

Definition at line 138 of file gzstream.h.

Member Data Documentation

_fd

int zypp::gzstream_detail::gzstreambufimpl::_fd = -1

private

file descriptor of the compressed file

Definition at line 142 of file gzstream.h.

_file

gzFile zypp::gzstream_detail::gzstreambufimpl::_file = nullptr

private

Definition at line 144 of file gzstream.h.

_mode

std::ios_base::openmode zypp::gzstream_detail::gzstreambufimpl::_mode = std::ios_base::openmode(0)

private

Definition at line 146 of file gzstream.h.

_error

ZlibError zypp::gzstream_detail::gzstreambufimpl::_error

mutableprivate

Definition at line 148 of file gzstream.h.

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The documentation for this class was generated from the following files:

• zypp-core/base/gzstream.h
• zypp-core/base/gzstream.cc