libpqxx  v4.0-1
C++ library for PostgreSQL
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pqxx::basic_ilostream< CHAR, TRAITS > Class Template Reference

Input stream that gets its data from a large object. More...

#include <largeobject.hxx>

Inheritance diagram for pqxx::basic_ilostream< CHAR, TRAITS >:
Collaboration diagram for pqxx::basic_ilostream< CHAR, TRAITS >:

Public Types

typedef CHAR char_type
 
typedef traits_type::int_type int_type
 
typedef traits_type::off_type off_type
 
typedef traits_type::pos_type pos_type
 
typedef TRAITS traits_type
 

Public Member Functions

 basic_ilostream (dbtransaction &T, largeobject O, largeobject::size_type BufSize=512)
 Create a basic_ilostream. More...
 
 basic_ilostream (dbtransaction &T, oid O, largeobject::size_type BufSize=512)
 Create a basic_ilostream. More...
 

Private Types

typedef PGSTD::istream super
 

Private Attributes

largeobject_streambuf< CHAR,
TRAITS > 
m_Buf
 

Detailed Description

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

Input stream that gets its data from a large object.

Use this class exactly as you would any other istream to read data from a large object. All formatting and streaming operations of std::istream are supported. What you'll typically want to use, however, is the ilostream typedef (which defines a basic_ilostream for char). This is similar to how e.g. std::ifstream relates to std::basic_ifstream.

Currently only works for <char, std::char_traits<char> >.

Member Typedef Documentation

template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>
typedef CHAR pqxx::basic_ilostream< CHAR, TRAITS >::char_type
template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>
typedef traits_type::int_type pqxx::basic_ilostream< CHAR, TRAITS >::int_type
template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>
typedef traits_type::off_type pqxx::basic_ilostream< CHAR, TRAITS >::off_type
template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>
typedef traits_type::pos_type pqxx::basic_ilostream< CHAR, TRAITS >::pos_type
template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>
typedef PGSTD::istream pqxx::basic_ilostream< CHAR, TRAITS >::super
private
template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>
typedef TRAITS pqxx::basic_ilostream< CHAR, TRAITS >::traits_type

Constructor & Destructor Documentation

template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>
pqxx::basic_ilostream< CHAR, TRAITS >::basic_ilostream ( dbtransaction T,
largeobject  O,
largeobject::size_type  BufSize = 512 
)
inline

Create a basic_ilostream.

Parameters
TTransaction in which this stream is to exist
OLarge object to access
BufSizeSize of buffer to use internally (optional)
template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>
pqxx::basic_ilostream< CHAR, TRAITS >::basic_ilostream ( dbtransaction T,
oid  O,
largeobject::size_type  BufSize = 512 
)
inline

Create a basic_ilostream.

Parameters
TTransaction in which this stream is to exist
OIdentifier of a large object to access
BufSizeSize of buffer to use internally (optional)

Member Data Documentation

template<typename CHAR = char, typename TRAITS = PGSTD::char_traits<CHAR>>
largeobject_streambuf<CHAR,TRAITS> pqxx::basic_ilostream< CHAR, TRAITS >::m_Buf
private

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