pqxx::largeobject_streambuf< CHAR, TRAITS > Class Template Reference

Streambuf to use large objects in standard I/O streams. More...

#include <largeobject.hxx>

Inheritance diagram for pqxx::largeobject_streambuf< CHAR, TRAITS >:

Collaboration diagram for pqxx::largeobject_streambuf< CHAR, TRAITS >:

Public Types
typedef CHAR	char_type
typedef traits_type::int_type	int_type
typedef streamoff	off_type
typedef largeobjectaccess::openmode	openmode
typedef streampos	pos_type
typedef largeobjectaccess::seekdir	seekdir
typedef TRAITS	traits_type

Public Member Functions
	largeobject_streambuf (dbtransaction &T, largeobject O, openmode mode=PGSTD::ios::in|PGSTD::ios::out, size_type BufSize=512)
	largeobject_streambuf (dbtransaction &T, oid O, openmode mode=PGSTD::ios::in|PGSTD::ios::out, size_type BufSize=512)
virtual	~largeobject_streambuf () throw ()
void	process_notice (const PGSTD::string &s)
	For use by large object stream classes. More...
virtual int	sync ()

Protected Member Functions
virtual int_type	overflow (int_type ch=EoF())
virtual pos_type	seekoff (off_type offset, seekdir dir, openmode)
virtual pos_type	seekpos (pos_type pos, openmode)
virtual int_type	underflow ()

Private Types
typedef long	size_type

Private Member Functions
void	initialize (openmode mode)

Static Private Member Functions
template<typename INTYPE >
static PGSTD::streampos	AdjustEOF (INTYPE pos)
	Helper: change error position of -1 to EOF (probably a no-op) More...
static int_type	EoF ()
	Shortcut for traits_type::eof() More...

Private Attributes
const size_type	m_BufSize
char_type *	m_G
largeobjectaccess	m_Obj
char_type *	m_P

Detailed Description

template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>
class pqxx::largeobject_streambuf< CHAR, TRAITS >

Streambuf to use large objects in standard I/O streams.

The standard streambuf classes provide uniform access to data storage such as files or string buffers, so they can be accessed using standard input or output streams. This streambuf implementation provides similar access to large objects, so they can be read and written using the same stream classes.

Warning

This class may not work properly in compiler environments that don't fully support Standard-compliant streambufs, such as g++ 2.95 or older.

Member Typedef Documentation

template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>

typedef CHAR pqxx::largeobject_streambuf< CHAR, TRAITS >::char_type

template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>

typedef traits_type::int_type pqxx::largeobject_streambuf< CHAR, TRAITS >::int_type

template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>

typedef streamoff pqxx::largeobject_streambuf< CHAR, TRAITS >::off_type

template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>

typedef largeobjectaccess::openmode pqxx::largeobject_streambuf< CHAR, TRAITS >::openmode

template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>

typedef streampos pqxx::largeobject_streambuf< CHAR, TRAITS >::pos_type

template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>

typedef largeobjectaccess::seekdir pqxx::largeobject_streambuf< CHAR, TRAITS >::seekdir

template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>

typedef long pqxx::largeobject_streambuf< CHAR, TRAITS >::size_type

private

template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>

typedef TRAITS pqxx::largeobject_streambuf< CHAR, TRAITS >::traits_type

Constructor & Destructor Documentation

template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>

pqxx::largeobject_streambuf< CHAR, TRAITS >::largeobject_streambuf ( dbtransaction &  T, largeobject  O, openmode  mode = PGSTD::ios::in | PGSTD::ios::out, size_type  BufSize = 512  )

inline

template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>

pqxx::largeobject_streambuf< CHAR, TRAITS >::largeobject_streambuf ( dbtransaction &  T, oid  O, openmode  mode = PGSTD::ios::in | PGSTD::ios::out, size_type  BufSize = 512  )

inline

template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>

virtual pqxx::largeobject_streambuf< CHAR, TRAITS >::~largeobject_streambuf ( ) throw ()

inlinevirtual

Member Function Documentation

template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>

template<typename INTYPE >

static PGSTD::streampos pqxx::largeobject_streambuf< CHAR, TRAITS >::AdjustEOF ( INTYPE  pos )

inlinestaticprivate

Helper: change error position of -1 to EOF (probably a no-op)

template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>

static int_type pqxx::largeobject_streambuf< CHAR, TRAITS >::EoF ( )

inlinestaticprivate

Shortcut for traits_type::eof()

template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>

void pqxx::largeobject_streambuf< CHAR, TRAITS >::initialize ( openmode  mode )

inlineprivate

template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>

virtual int_type pqxx::largeobject_streambuf< CHAR, TRAITS >::overflow ( int_type  ch = EoF() )

inlineprotectedvirtual

template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>

void pqxx::largeobject_streambuf< CHAR, TRAITS >::process_notice ( const PGSTD::string &  s )

inline

For use by large object stream classes.

template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>

virtual pos_type pqxx::largeobject_streambuf< CHAR, TRAITS >::seekoff ( off_type  offset, seekdir  dir, openmode    )

inlineprotectedvirtual

template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>

virtual pos_type pqxx::largeobject_streambuf< CHAR, TRAITS >::seekpos ( pos_type  pos, openmode    )

inlineprotectedvirtual

template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>

virtual int pqxx::largeobject_streambuf< CHAR, TRAITS >::sync ( )

inlinevirtual

template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>

virtual int_type pqxx::largeobject_streambuf< CHAR, TRAITS >::underflow ( )

inlineprotectedvirtual

Member Data Documentation

template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>

const size_type pqxx::largeobject_streambuf< CHAR, TRAITS >::m_BufSize

private

template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>

char_type* pqxx::largeobject_streambuf< CHAR, TRAITS >::m_G

private

template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>

largeobjectaccess pqxx::largeobject_streambuf< CHAR, TRAITS >::m_Obj

private

template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>

char_type * pqxx::largeobject_streambuf< CHAR, TRAITS >::m_P

private

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

• /usr/include/pqxx/largeobject.hxx