zypp::detail::SimpleStreamBuf< Impl > Class Template Reference

#include <base/simplestreambuf.h>

Inheritance diagram for zypp::detail::SimpleStreamBuf< Impl >:

Public Member Functions
	SimpleStreamBuf (size_t bufsize_r=512)
virtual	~SimpleStreamBuf ()
SimpleStreamBuf *	open (const char *name_r, std::ios_base::openmode mode_r=std::ios_base::in)
SimpleStreamBuf *	close ()

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

Private Types
typedef std::vector< char >	buffer_type

Private Attributes
buffer_type	_buffer

Additional Inherited Members
Related Functions inherited from Impl
std::ostream &	operator<< (std::ostream &str, const RepoManager::Impl &obj)
	Stream output. More...

Detailed Description

template<typename Impl>
class zypp::detail::SimpleStreamBuf< Impl >

Implementation of a std::streambuf that is using a std::vector<char> as buffer, relies on a Impl class that must implement the basic i/o functionality:

class streambufimpl {
  public:
    using error_type = my_error_type;
 
    ~streambufimpl();
 
    bool isOpen   () const; // returns true if the file is currently open
    bool canRead  () const; // returns true if in read mode
    bool canWrite () const; // returns true if in write mode
    bool canSeek  ( std::ios_base::seekdir way_r ) const; // returns true if the backend can seek in the given way
 
    std::streamsize readData ( char * buffer_r, std::streamsize maxcount_r  ); // reads data from the file and returns it in buffer_r
    bool writeData( const char * buffer_r, std::streamsize count_r ); // writes data ( if in write mode ) to file from buffer
    off_t seekTo( off_t off_r, std::ios_base::seekdir way_r, std::ios_base::openmode omode_r ); // seeks in file if supported
    off_t tell() const; // returns the current FP
 
    error_type error() const; // returns the last error that happend in backend
 
  protected:
    bool openImpl( const char * name_r, std::ios_base::openmode mode_r ); // backend implementation of opening the file
    bool closeImpl ();  // closes the file
};
using FullStreamBuf = detail::SimpleStreamBuf<streambufimpl>;

Note

Currently only supports reading or writing at the same time, but can be extended to support both

Definition at line 54 of file simplestreambuf.h.

Member Typedef Documentation

buffer_type

template<typename Impl >

typedef std::vector<char> zypp::detail::SimpleStreamBuf< Impl >::buffer_type

private

Definition at line 212 of file simplestreambuf.h.

Constructor & Destructor Documentation

SimpleStreamBuf()

template<typename Impl >

zypp::detail::SimpleStreamBuf< Impl >::SimpleStreamBuf ( size_t  bufsize_r = 512 )

inline

Definition at line 59 of file simplestreambuf.h.

~SimpleStreamBuf()

template<typename Impl >

virtual zypp::detail::SimpleStreamBuf< Impl >::~SimpleStreamBuf ( )

inlinevirtual

Definition at line 60 of file simplestreambuf.h.

Member Function Documentation

open()

template<typename Impl >

SimpleStreamBuf * zypp::detail::SimpleStreamBuf< Impl >::open ( const char *  name_r, std::ios_base::openmode  mode_r = std::ios_base::in  )

inline

Definition at line 62 of file simplestreambuf.h.

close()

template<typename Impl >

SimpleStreamBuf * zypp::detail::SimpleStreamBuf< Impl >::close ( )

inline

Definition at line 78 of file simplestreambuf.h.

sync()

template<typename Impl >

virtual int zypp::detail::SimpleStreamBuf< Impl >::sync ( )

inlineprotectedvirtual

Definition at line 94 of file simplestreambuf.h.

overflow()

template<typename Impl >

virtual int_type zypp::detail::SimpleStreamBuf< Impl >::overflow ( int_type  c = traits_type::eof() )

inlineprotectedvirtual

Definition at line 104 of file simplestreambuf.h.

underflow()

template<typename Impl >

virtual int_type zypp::detail::SimpleStreamBuf< Impl >::underflow ( )

inlineprotectedvirtual

Definition at line 125 of file simplestreambuf.h.

seekpos()

template<typename Impl >

virtual pos_type zypp::detail::SimpleStreamBuf< Impl >::seekpos ( pos_type  pos_r, std::ios_base::openmode  openMode  )

inlineprotectedvirtual

Definition at line 148 of file simplestreambuf.h.

seekoff()

template<typename Impl >

virtual pos_type zypp::detail::SimpleStreamBuf< Impl >::seekoff ( off_type  off_r, std::ios_base::seekdir  way_r, std::ios_base::openmode  openMode  )

inlineprotectedvirtual

Definition at line 153 of file simplestreambuf.h.

Member Data Documentation

_buffer

template<typename Impl >

buffer_type zypp::detail::SimpleStreamBuf< Impl >::_buffer

private

Definition at line 213 of file simplestreambuf.h.

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

• zypp-core/base/simplestreambuf.h