zypp::gzstream_detail::fgzstreambuf Class Reference

Streambuffer reading or writing gzip files. More...

#include <GzStream.h>

Inheritance diagram for zypp::gzstream_detail::fgzstreambuf:
[legend]

List of all members.

Public Member Functions

 fgzstreambuf (unsigned bufferSize_r=512)
virtual ~fgzstreambuf ()
bool isOpen () const
bool inReadMode () const
bool inWriteMode () const
fgzstreambuf * open (const char *name_r, std::ios_base::openmode mode_r=std::ios_base::in)
fgzstreambuf * close ()
pos_type compressed_tell () const
 Tell the file position in the compressed file.
ZlibError zError () const
 The last error returned fron zlib.

Protected Member Functions

virtual int sync ()
virtual int_type overflow (int_type c=traits_type::eof())
virtual int_type underflow ()
virtual pos_type seekoff (off_type off_r, std::ios_base::seekdir way_r, std::ios_base::openmode)
virtual pos_type seekpos (pos_type pos_r, std::ios_base::openmode)

Private Types

typedef std::vector< char > buffer_type

Private Member Functions

void setZError ()
std::streamsize zReadTo (char *buffer_r, std::streamsize maxcount_r)
bool zWriteFrom (const char *buffer_r, std::streamsize count_r)
pos_type zSeekTo (off_type off_r, std::ios_base::seekdir way_r)
pos_type zTell ()
pos_type seekTo (off_type off_r, std::ios_base::seekdir way_r)

Private Attributes

int _fd
 file descriptor of the compressed file
gzFile _file
std::ios_base::openmode _mode
buffer_type _buffer
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 86 of file GzStream.h.

Member Typedef Documentation

typedef std::vector<char> zypp::gzstream_detail::fgzstreambuf::buffer_type [private]

Definition at line 151 of file GzStream.h.

Constructor & Destructor Documentation

zypp::gzstream_detail::fgzstreambuf::fgzstreambuf ( unsigned  bufferSize_r = 512  )  [inline]

Definition at line 90 of file GzStream.h.

virtual zypp::gzstream_detail::fgzstreambuf::~fgzstreambuf (  )  [inline, virtual]

Definition at line 98 of file GzStream.h.

References close().

Member Function Documentation

bool zypp::gzstream_detail::fgzstreambuf::isOpen (  )  const [inline]

Definition at line 102 of file GzStream.h.

References _file.

Referenced by close(), open(), and seekTo().

bool zypp::gzstream_detail::fgzstreambuf::inReadMode (  )  const [inline]

Definition at line 106 of file GzStream.h.

References _mode.

Referenced by open(), and underflow().

bool zypp::gzstream_detail::fgzstreambuf::inWriteMode (  )  const [inline]

Definition at line 110 of file GzStream.h.

References _mode.

Referenced by overflow(), and seekTo().

fgzstreambuf * zypp::gzstream_detail::fgzstreambuf::open ( const char *  name_r,
std::ios_base::openmode  mode_r = std::ios_base::in 
)

Definition at line 74 of file GzStream.cc.

References _buffer, _fd, _file, _mode, inReadMode(), isOpen(), and setZError().

fgzstreambuf * zypp::gzstream_detail::fgzstreambuf::close (  ) 

Definition at line 120 of file GzStream.cc.

References zypp::gzstream_detail::ZlibError::_errno, _error, _fd, _file, _mode, zypp::gzstream_detail::ZlibError::_zError, isOpen(), and sync().

Referenced by ~fgzstreambuf().

fgzstreambuf::pos_type zypp::gzstream_detail::fgzstreambuf::compressed_tell (  )  const

Tell the file position in the compressed file.

Analogous to tell(2), complementary to gztell.

Definition at line 352 of file GzStream.cc.

References _fd.

ZlibError zypp::gzstream_detail::fgzstreambuf::zError (  )  const [inline]

The last error returned fron zlib.

Definition at line 127 of file GzStream.h.

References _error.

int zypp::gzstream_detail::fgzstreambuf::sync (  )  [protected, virtual]

Definition at line 156 of file GzStream.cc.

References overflow().

Referenced by close(), and seekTo().

fgzstreambuf::int_type zypp::gzstream_detail::fgzstreambuf::overflow ( int_type  c = traits_type::eof()  )  [protected, virtual]

Definition at line 173 of file GzStream.cc.

References _buffer, inWriteMode(), and zWriteFrom().

Referenced by sync().

fgzstreambuf::int_type zypp::gzstream_detail::fgzstreambuf::underflow (  )  [protected, virtual]

Definition at line 202 of file GzStream.cc.

References _buffer, inReadMode(), and zReadTo().

virtual pos_type zypp::gzstream_detail::fgzstreambuf::seekoff ( off_type  off_r,
std::ios_base::seekdir  way_r,
std::ios_base::openmode   
) [inline, protected, virtual]

Definition at line 142 of file GzStream.h.

References seekTo().

virtual pos_type zypp::gzstream_detail::fgzstreambuf::seekpos ( pos_type  pos_r,
std::ios_base::openmode   
) [inline, protected, virtual]

Definition at line 146 of file GzStream.h.

References seekTo().

void zypp::gzstream_detail::fgzstreambuf::setZError (  )  [inline, private]

Definition at line 167 of file GzStream.h.

References _error, _file, and zypp::gzstream_detail::ZlibError::_zError.

Referenced by open(), zReadTo(), zSeekTo(), zTell(), and zWriteFrom().

std::streamsize zypp::gzstream_detail::fgzstreambuf::zReadTo ( char *  buffer_r,
std::streamsize  maxcount_r 
) [private]

Definition at line 232 of file GzStream.cc.

References _file, zypp::base::sysconfig::read(), and setZError().

Referenced by underflow().

bool zypp::gzstream_detail::fgzstreambuf::zWriteFrom ( const char *  buffer_r,
std::streamsize  count_r 
) [private]

Definition at line 246 of file GzStream.cc.

References _file, and setZError().

Referenced by overflow().

fgzstreambuf::pos_type zypp::gzstream_detail::fgzstreambuf::zSeekTo ( off_type  off_r,
std::ios_base::seekdir  way_r 
) [private]

Definition at line 263 of file GzStream.cc.

References _file, and setZError().

Referenced by seekTo().

fgzstreambuf::pos_type zypp::gzstream_detail::fgzstreambuf::zTell (  )  [private]

Definition at line 277 of file GzStream.cc.

References _file, and setZError().

Referenced by seekTo().

fgzstreambuf::pos_type zypp::gzstream_detail::fgzstreambuf::seekTo ( off_type  off_r,
std::ios_base::seekdir  way_r 
) [private]

Definition at line 291 of file GzStream.cc.

References _buffer, inWriteMode(), isOpen(), sync(), zSeekTo(), and zTell().

Referenced by seekoff(), and seekpos().

Member Data Documentation

int zypp::gzstream_detail::fgzstreambuf::_fd [private]

file descriptor of the compressed file

Definition at line 154 of file GzStream.h.

Referenced by close(), compressed_tell(), and open().

gzFile zypp::gzstream_detail::fgzstreambuf::_file [private]

Definition at line 156 of file GzStream.h.

Referenced by close(), isOpen(), open(), setZError(), zReadTo(), zSeekTo(), zTell(), and zWriteFrom().

std::ios_base::openmode zypp::gzstream_detail::fgzstreambuf::_mode [private]

Definition at line 158 of file GzStream.h.

Referenced by close(), inReadMode(), inWriteMode(), and open().

buffer_type zypp::gzstream_detail::fgzstreambuf::_buffer [private]

Definition at line 160 of file GzStream.h.

Referenced by open(), overflow(), seekTo(), and underflow().

ZlibError zypp::gzstream_detail::fgzstreambuf::_error [private]

Definition at line 162 of file GzStream.h.

Referenced by close(), setZError(), and zError().

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