FilebufAppend Class Reference

Optimizes std::filebuf for random-access reading. More...

#include <filebuf.h>

Inheritance diagram for FilebufAppend:

Collaboration diagram for FilebufAppend:

Public Member Functions
	FilebufAppend ()
errorT	open (const std::string &filename, fileModeT fmode)
	Opens a file and store its size. More...
unsigned long long	size () const
	Returns the size of the file. More...
int	pubsync ()
	Invokes std::filebuf::sync() to write all pending output to the file. More...
errorT	append (const char_type *s, std::streamsize count)
	Writes, at the end of the file, count characters from the character array whose first element is pointed to by s. More...
std::streamsize	sgetn (char_type *s, std::streamsize count)
	Invoke filebuf::xsgetn() and update filePos_. More...
std::streamoff	pubseekpos (std::streamoff pos)
	Repositions the internal buffer or invoke filebuf::seekpos(). More...

Additional Inherited Members
Protected Member Functions inherited from Filebuf
errorT	Open (const char *filename, fileModeT fmode)
	Opens a file. More...
size_t	getline (char *str, size_t count)
	Equivalent to std::fstream::getline, but faster (no sentry [27.7.2.1.3]). More...
byte	ReadOneByte ()
	Reads a 8-bit unsigned integer. More...
uint16_t	ReadTwoBytes ()
	Reads a 16-bit unsigned integer. More...
uint32_t	ReadThreeBytes ()
	Reads a 24-bit unsigned integer. More...
uint32_t	ReadFourBytes ()
	Reads a 32-bit unsigned integer. More...
int	WriteOneByte (byte value)
	Writes a 8-bit unsigned integer. More...
int	WriteTwoBytes (uint32_t value)
	Writes a 16-bit unsigned integer. More...
int	WriteThreeBytes (uint32_t value)
	Writes a 24-bit unsigned integer. More...
int	WriteFourBytes (uint32_t value)
	Writes a 32-bit unsigned integer. More...

Detailed Description

Optimizes std::filebuf for random-access reading.

Definition at line 184 of file filebuf.h.

Constructor & Destructor Documentation

FilebufAppend()

FilebufAppend::FilebufAppend ( )

inline

Definition at line 189 of file filebuf.h.

Member Function Documentation

append()

errorT FilebufAppend::append ( const char_type *  s, std::streamsize  count  )

inline

Writes, at the end of the file, count characters from the character array whose first element is pointed to by s.

Returns

OK in case of success, an error code otherwise.

Definition at line 223 of file filebuf.h.

open()

errorT FilebufAppend::open ( const std::string &  filename, fileModeT  fmode  )

inline

Opens a file and store its size.

Parameters

filename	path to the file to be opened.
fmode	open the file for reading, writing, or both.

Returns

OK on success, an errorT code on failure.

Definition at line 197 of file filebuf.h.

pubseekpos()

std::streamoff FilebufAppend::pubseekpos ( std::streamoff  pos )

inline

Repositions the internal buffer or invoke filebuf::seekpos().

In the standard implementation, the buffer must be abandoned to ensure consistency when transitioning from reading to writing.

Definition at line 252 of file filebuf.h.

pubsync()

int FilebufAppend::pubsync ( )

inline

Invokes std::filebuf::sync() to write all pending output to the file.

Returns

0 in case of success, -1 in case of failure.

Definition at line 216 of file filebuf.h.

sgetn()

std::streamsize FilebufAppend::sgetn ( char_type *  s, std::streamsize  count  )

inline

Invoke filebuf::xsgetn() and update filePos_.

Definition at line 241 of file filebuf.h.

size()

unsigned long long FilebufAppend::size ( ) const

inline

Returns the size of the file.

Definition at line 210 of file filebuf.h.

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

• src/filebuf.h