Inheritance diagram for __gnu_cxx::stdio_sync_filebuf< _CharT, _Traits >:

[legend]

Public Types
typedef _CharT	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
	stdio_sync_filebuf (std::__c_file *__f)

	stdio_sync_filebuf (stdio_sync_filebuf &&__fb) noexcept

std::__c_file *	file ()

locale	getloc () const

streamsize	in_avail ()

stdio_sync_filebuf &	operator= (stdio_sync_filebuf &&__fb) noexcept

locale	pubimbue (const locale &__loc)

int_type	sbumpc ()

int_type	sgetc ()

streamsize	sgetn (char_type *__s, streamsize __n)

int_type	snextc ()

int_type	sputbackc (char_type __c)

int_type	sputc (char_type __c)

streamsize	sputn (const char_type *__s, streamsize __n)

int_type	sungetc ()

void	swap (stdio_sync_filebuf &__fb)


basic_streambuf *	pubsetbuf (char_type *__s, streamsize __n)

pos_type	pubseekoff (off_type __off, ios_base::seekdir __way, ios_base::openmode __mode=ios_base::in\|ios_base::out)

pos_type	pubseekpos (pos_type __sp, ios_base::openmode __mode=ios_base::in\|ios_base::out)

int	pubsync ()

Protected Member Functions
void	__safe_gbump (streamsize __n)

void	__safe_pbump (streamsize __n)

void	gbump (int __n)

virtual void	imbue (const locale &__loc)

virtual int_type	overflow (int_type __c=traits_type::eof())

virtual int_type	pbackfail (int_type __c=traits_type::eof())

void	pbump (int __n)

virtual std::streampos	seekoff (std::streamoff __off, std::ios_base::seekdir __dir, std::ios_base::openmode=std::ios_base::in\|std::ios_base::out)

virtual pos_type	seekoff (off_type, ios_base::seekdir, ios_base::openmode=ios_base::in\|ios_base::out)

virtual std::streampos	seekpos (std::streampos __pos, std::ios_base::openmode __mode=std::ios_base::in\|std::ios_base::out)

virtual pos_type	seekpos (pos_type, ios_base::openmode=ios_base::in\|ios_base::out)

virtual basic_streambuf< char_type, _Traits > *	setbuf (char_type *, streamsize)

void	setg (char_type __gbeg, char_type __gnext, char_type *__gend)

void	setp (char_type __pbeg, char_type __pend)

virtual streamsize	showmanyc ()

void	swap (basic_streambuf &__sb)

virtual int	sync ()

int_type	syncgetc ()

template<>
stdio_sync_filebuf< char >::int_type	syncgetc ()

template<>
stdio_sync_filebuf< wchar_t >::int_type	syncgetc ()

int_type	syncputc (int_type __c)

template<>
stdio_sync_filebuf< char >::int_type	syncputc (int_type __c)

template<>
stdio_sync_filebuf< wchar_t >::int_type	syncputc (int_type __c)

int_type	syncungetc (int_type __c)

template<>
stdio_sync_filebuf< char >::int_type	syncungetc (int_type __c)

template<>
stdio_sync_filebuf< wchar_t >::int_type	syncungetc (int_type __c)

virtual int_type	uflow ()

virtual int_type	underflow ()

virtual std::streamsize	xsgetn (char_type *__s, std::streamsize __n)

template<>
std::streamsize	xsgetn (char *__s, std::streamsize __n)

template<>
std::streamsize	xsgetn (wchar_t *__s, std::streamsize __n)

virtual streamsize	xsgetn (char_type *__s, streamsize __n)

virtual std::streamsize	xsputn (const char_type *__s, std::streamsize __n)

template<>
std::streamsize	xsputn (const char *__s, std::streamsize __n)

template<>
std::streamsize	xsputn (const wchar_t *__s, std::streamsize __n)

virtual streamsize	xsputn (const char_type *__s, streamsize __n)


char_type *	eback () const

char_type *	gptr () const

char_type *	egptr () const


char_type *	pbase () const

char_type *	pptr () const

char_type *	epptr () const

Protected Attributes
locale	_M_buf_locale

char_type *	_M_in_beg

char_type *	_M_in_cur

char_type *	_M_in_end

char_type *	_M_out_beg

char_type *	_M_out_cur

char_type *	_M_out_end

Detailed Description

template<typename _CharT, typename _Traits = std::char_traits<_CharT>>
class __gnu_cxx::stdio_sync_filebuf< _CharT, _Traits >

Provides a layer of compatibility for C.

This GNU extension provides extensions for working with standard C FILE*'s. It must be instantiated by the user with the type of character used in the file stream, e.g., stdio_filebuf<char>.

Definition at line 57 of file stdio_sync_filebuf.h.

Member Function Documentation

template<typename _CharT, typename _Traits>

char_type* std::basic_streambuf< _CharT, _Traits >::eback ( ) const

inlineprotectedinherited

Access to the get area.

These functions are only available to other protected functions, including derived classes.

eback() returns the beginning pointer for the input sequence
gptr() returns the next pointer for the input sequence
egptr() returns the end pointer for the input sequence

Definition at line 482 of file streambuf.

Referenced by std::basic_filebuf< _CharT, _Traits >::imbue(), std::basic_filebuf< _CharT, _Traits >::pbackfail(), std::basic_filebuf< _CharT, _Traits >::seekpos(), std::basic_filebuf< _CharT, _Traits >::underflow(), and std::basic_filebuf< _CharT, _Traits >::xsgetn().

template<typename _CharT, typename _Traits>

char_type* std::basic_streambuf< _CharT, _Traits >::egptr ( ) const

inlineprotectedinherited

Access to the get area.

These functions are only available to other protected functions, including derived classes.

eback() returns the beginning pointer for the input sequence
gptr() returns the next pointer for the input sequence
egptr() returns the end pointer for the input sequence

Definition at line 488 of file streambuf.

Referenced by std::ostreambuf_iterator< _CharT, _Traits >::failed(), std::basic_filebuf< _CharT, _Traits >::seekpos(), std::basic_filebuf< _CharT, _Traits >::showmanyc(), std::basic_filebuf< _CharT, _Traits >::underflow(), and std::basic_filebuf< _CharT, _Traits >::xsgetn().

template<typename _CharT, typename _Traits>

char_type* std::basic_streambuf< _CharT, _Traits >::epptr ( ) const

inlineprotectedinherited

Access to the put area.

These functions are only available to other protected functions, including derived classes.

pbase() returns the beginning pointer for the output sequence
pptr() returns the next pointer for the output sequence
epptr() returns the end pointer for the output sequence

Definition at line 535 of file streambuf.

Referenced by std::basic_filebuf< _CharT, _Traits >::xsputn().

template<typename _CharT, typename _Traits = std::char_traits<_CharT>>

std::__c_file* __gnu_cxx::stdio_sync_filebuf< _CharT, _Traits >::file ( )

inline

Returns: The underlying FILE*.

This function can be used to access the underlying C file pointer. Note that there is no way for the library to track what you do with the file, so be careful.

Definition at line 118 of file stdio_sync_filebuf.h.

template<typename _CharT, typename _Traits>

void std::basic_streambuf< _CharT, _Traits >::gbump ( int __n )

inlineprotectedinherited

Moving the read position.

Parameters

__n	The delta by which to move.

This just advances the read position without returning any data.

Definition at line 498 of file streambuf.

Referenced by std::basic_filebuf< _CharT, _Traits >::pbackfail(), and std::basic_filebuf< _CharT, _Traits >::xsgetn().

template<typename _CharT, typename _Traits>

locale std::basic_streambuf< _CharT, _Traits >::getloc ( ) const

inlineinherited

Locale access.

Returns: The current locale in effect.

If pubimbue(loc) has been called, then the most recent loc is returned. Otherwise the global locale in effect at the time of construction is returned.

Definition at line 226 of file streambuf.

template<typename _CharT, typename _Traits>

char_type* std::basic_streambuf< _CharT, _Traits >::gptr ( ) const

inlineprotectedinherited

Access to the get area.

These functions are only available to other protected functions, including derived classes.

eback() returns the beginning pointer for the input sequence
gptr() returns the next pointer for the input sequence
egptr() returns the end pointer for the input sequence

Definition at line 485 of file streambuf.

Referenced by std::ostreambuf_iterator< _CharT, _Traits >::failed(), std::basic_filebuf< _CharT, _Traits >::imbue(), std::basic_filebuf< _CharT, _Traits >::pbackfail(), std::basic_filebuf< _CharT, _Traits >::seekpos(), std::basic_filebuf< _CharT, _Traits >::showmanyc(), std::basic_filebuf< _CharT, _Traits >::underflow(), and std::basic_filebuf< _CharT, _Traits >::xsgetn().

template<typename _CharT, typename _Traits>

virtual void std::basic_streambuf< _CharT, _Traits >::imbue ( const locale & __loc )

inlineprotectedvirtualinherited

Changes translations.

Parameters

__loc A new locale.

Translations done during I/O which depend on the current locale are changed by this call. The standard adds, Between invocations of this function a class derived from streambuf can safely cache results of calls to locale functions and to members of facets so obtained.

Note: Base class version does nothing.

Reimplemented in std::basic_filebuf< _CharT, _Traits >, std::basic_filebuf< _CharT, encoding_char_traits< _CharT > >, and std::basic_filebuf< char_type, traits_type >.

Definition at line 576 of file streambuf.

template<typename _CharT, typename _Traits>

streamsize std::basic_streambuf< _CharT, _Traits >::in_avail ( )

inlineinherited

Looking ahead into the stream.

Returns: The number of characters available.

If a read position is available, returns the number of characters available for reading before the buffer must be refilled. Otherwise returns the derived showmanyc().

Definition at line 284 of file streambuf.

template<typename _CharT, typename _Traits = std::char_traits<_CharT>>

virtual int_type __gnu_cxx::stdio_sync_filebuf< _CharT, _Traits >::overflow ( int_type __c = traits_type::eof() )

inlineprotectedvirtual

Consumes data from the buffer; writes to the controlled sequence.

Parameters

__c	An additional character to consume.

Returns: eof() to indicate failure, something else (usually __c, or not_eof())

Informally, this function is called when the output buffer is full (or does not exist, as buffering need not actually be done). If a buffer exists, it is consumed, with some effect on the controlled sequence. (Typically, the buffer is written out to the sequence verbatim.) In either case, the character c is also written out, if __c is not eof().

For a formal definition of this function, see a good text such as Langer & Kreft, or [27.5.2.4.5]/3-7.

A functioning output streambuf can be created by overriding only this function (no buffer area will be used).

Note: Base class version does nothing, returns eof().

Reimplemented from std::basic_streambuf< _CharT, _Traits >.

Definition at line 171 of file stdio_sync_filebuf.h.

template<typename _CharT, typename _Traits = std::char_traits<_CharT>>

virtual int_type __gnu_cxx::stdio_sync_filebuf< _CharT, _Traits >::pbackfail ( int_type __c = traits_type::eof() )

inlineprotectedvirtual

Tries to back up the input sequence.

Parameters

__c	The character to be inserted back into the sequence.

Returns: eof() on failure, some other value on success

Postcondition: The constraints of gptr(), eback(), and pptr() are the same as for underflow().

Note: Base class version does nothing, returns eof().

Reimplemented from std::basic_streambuf< _CharT, _Traits >.

Definition at line 146 of file stdio_sync_filebuf.h.

template<typename _CharT, typename _Traits>

char_type* std::basic_streambuf< _CharT, _Traits >::pbase ( ) const

inlineprotectedinherited

Access to the put area.

These functions are only available to other protected functions, including derived classes.

pbase() returns the beginning pointer for the output sequence
pptr() returns the next pointer for the output sequence
epptr() returns the end pointer for the output sequence

Definition at line 529 of file streambuf.

Referenced by std::basic_filebuf< _CharT, _Traits >::overflow(), std::basic_filebuf< _CharT, _Traits >::seekoff(), std::basic_filebuf< _CharT, _Traits >::seekpos(), std::basic_filebuf< _CharT, _Traits >::sync(), and std::basic_filebuf< _CharT, _Traits >::xsputn().

template<typename _CharT, typename _Traits>

void std::basic_streambuf< _CharT, _Traits >::pbump ( int __n )

inlineprotectedinherited

Moving the write position.

Parameters

__n	The delta by which to move.

This just advances the write position without returning any data.

Definition at line 545 of file streambuf.

Referenced by std::basic_filebuf< _CharT, _Traits >::overflow().

template<typename _CharT, typename _Traits>

char_type* std::basic_streambuf< _CharT, _Traits >::pptr ( ) const

inlineprotectedinherited

Access to the put area.

These functions are only available to other protected functions, including derived classes.

pbase() returns the beginning pointer for the output sequence
pptr() returns the next pointer for the output sequence
epptr() returns the end pointer for the output sequence

Definition at line 532 of file streambuf.

Referenced by std::basic_filebuf< _CharT, _Traits >::overflow(), std::basic_filebuf< _CharT, _Traits >::seekoff(), std::basic_filebuf< _CharT, _Traits >::seekpos(), std::basic_filebuf< _CharT, _Traits >::sync(), and std::basic_filebuf< _CharT, _Traits >::xsputn().

template<typename _CharT, typename _Traits>

locale std::basic_streambuf< _CharT, _Traits >::pubimbue ( const locale & __loc )

inlineinherited

Entry point for imbue().

Parameters

__loc The new locale.

Returns: The previous locale.

Calls the derived imbue(__loc).

Definition at line 209 of file streambuf.

template<typename _CharT, typename _Traits>

pos_type std::basic_streambuf< _CharT, _Traits >::pubseekoff	(	off_type	__off,
		ios_base::seekdir	__way,
		ios_base::openmode	__mode = `ios_base::in \| ios_base::out`
	)

inlineinherited

Alters the stream position.

Parameters

__off	Offset.
__way	Value for ios_base::seekdir.
__mode	Value for ios_base::openmode.

Calls virtual seekoff function.

Definition at line 251 of file streambuf.

template<typename _CharT, typename _Traits>

pos_type std::basic_streambuf< _CharT, _Traits >::pubseekpos	(	pos_type	__sp,
		ios_base::openmode	__mode = `ios_base::in \| ios_base::out`
	)

inlineinherited

Alters the stream position.

Parameters

__sp	Position
__mode	Value for ios_base::openmode.

Calls virtual seekpos function.

Definition at line 263 of file streambuf.

template<typename _CharT, typename _Traits>

basic_streambuf* std::basic_streambuf< _CharT, _Traits >::pubsetbuf	(	char_type *	__s,
		streamsize	__n
	)

inlineinherited

Entry points for derived buffer functions.

The public versions of pubfoo dispatch to the protected derived foo member functions, passing the arguments (if any) and returning the result unchanged.

Definition at line 239 of file streambuf.

template<typename _CharT, typename _Traits>

int std::basic_streambuf< _CharT, _Traits >::pubsync ( )

inlineinherited

Calls virtual sync function.

Definition at line 271 of file streambuf.

Referenced by std::basic_istream< _CharT, _Traits >::sync().

template<typename _CharT, typename _Traits>

int_type std::basic_streambuf< _CharT, _Traits >::sbumpc ( )

inlineinherited

Getting the next character.

Returns: The next character, or eof.

If the input read position is available, returns that character and increments the read pointer, otherwise calls and returns uflow().

Definition at line 316 of file streambuf.

Referenced by std::basic_istream< _CharT, _Traits >::getline(), std::basic_istream< _CharT, _Traits >::ignore(), and std::istreambuf_iterator< _CharT, _Traits >::operator++().

template<typename _CharT, typename _Traits>

virtual pos_type std::basic_streambuf< _CharT, _Traits >::seekoff	(	off_type	,
		ios_base::seekdir	,
		ios_base::openmode	= `ios_base::in \| ios_base::out`
	)

inlineprotectedvirtualinherited

Alters the stream positions.

Each derived class provides its own appropriate behavior.

Note: Base class version does nothing, returns a pos_type that represents an invalid stream position.

Reimplemented in std::basic_filebuf< _CharT, _Traits >, std::basic_filebuf< _CharT, encoding_char_traits< _CharT > >, std::basic_filebuf< char_type, traits_type >, and std::basic_stringbuf< _CharT, _Traits, _Alloc >.

Definition at line 602 of file streambuf.

template<typename _CharT, typename _Traits>

virtual pos_type std::basic_streambuf< _CharT, _Traits >::seekpos	(	pos_type	,
		ios_base::openmode	= `ios_base::in \| ios_base::out`
	)

inlineprotectedvirtualinherited

Alters the stream positions.

Each derived class provides its own appropriate behavior.

Note: Base class version does nothing, returns a pos_type that represents an invalid stream position.

Reimplemented in std::basic_filebuf< _CharT, _Traits >, std::basic_filebuf< _CharT, encoding_char_traits< _CharT > >, std::basic_filebuf< char_type, traits_type >, and std::basic_stringbuf< _CharT, _Traits, _Alloc >.

Definition at line 614 of file streambuf.

template<typename _CharT, typename _Traits>

virtual basic_streambuf<char_type,_Traits>* std::basic_streambuf< _CharT, _Traits >::setbuf	(	char_type *	,
		streamsize
	)

inlineprotectedvirtualinherited

Manipulates the buffer.

Each derived class provides its own appropriate behavior. See the next-to-last paragraph of https://gcc.gnu.org/onlinedocs/libstdc++/manual/streambufs.html#io.streambuf.buffering for more on this function.

Note: Base class version does nothing, returns this.

Reimplemented in std::basic_filebuf< _CharT, _Traits >, std::basic_filebuf< _CharT, encoding_char_traits< _CharT > >, std::basic_filebuf< char_type, traits_type >, and std::basic_stringbuf< _CharT, _Traits, _Alloc >.

Definition at line 591 of file streambuf.

template<typename _CharT, typename _Traits>

void std::basic_streambuf< _CharT, _Traits >::setg	(	char_type *	__gbeg,
		char_type *	__gnext,
		char_type *	__gend
	)

inlineprotectedinherited

Setting the three read area pointers.

Parameters

__gbeg	A pointer.
__gnext	A pointer.
__gend	A pointer.

Postcondition: __gbeg == eback(), __gnext == gptr(), and __gend == egptr()

Definition at line 509 of file streambuf.

Referenced by std::basic_filebuf< _CharT, _Traits >::xsgetn().

template<typename _CharT, typename _Traits>

void std::basic_streambuf< _CharT, _Traits >::setp	(	char_type *	__pbeg,
		char_type *	__pend
	)

inlineprotectedinherited

Setting the three write area pointers.

Parameters

__pbeg	A pointer.
__pend	A pointer.

Postcondition: __pbeg == pbase(), __pbeg == pptr(), and __pend == epptr()

Definition at line 555 of file streambuf.

template<typename _CharT, typename _Traits>

int_type std::basic_streambuf< _CharT, _Traits >::sgetc ( )

inlineinherited

Getting the next character.

Returns: The next character, or eof.

If the input read position is available, returns that character, otherwise calls and returns underflow(). Does not move the read position after fetching the character.

Definition at line 338 of file streambuf.

Referenced by std::istreambuf_iterator< _CharT, _Traits >::equal(), std::ostreambuf_iterator< _CharT, _Traits >::failed(), std::basic_istream< _CharT, _Traits >::get(), std::basic_istream< _CharT, _Traits >::getline(), std::basic_istream< _CharT, _Traits >::ignore(), std::basic_istream< _CharT, _Traits >::sentry::sentry(), and std::basic_streambuf< _CharT, _Traits >::xsputn().

template<typename _CharT, typename _Traits>

streamsize std::basic_streambuf< _CharT, _Traits >::sgetn	(	char_type *	__s,
		streamsize	__n
	)

inlineinherited

Entry point for xsgetn.

Parameters

__s	A buffer area.
__n	A count.

Returns xsgetn(__s,__n). The effect is to fill __s[0] through __s[__n-1] with characters from the input sequence, if possible.

Definition at line 357 of file streambuf.

template<typename _CharT, typename _Traits>

virtual streamsize std::basic_streambuf< _CharT, _Traits >::showmanyc ( )

inlineprotectedvirtualinherited

Investigating the data available.

Returns: An estimate of the number of characters available in the input sequence, or -1.

If it returns a positive value, then successive calls to underflow() will not return traits::eof() until at least that number of characters have been supplied. If showmanyc() returns -1, then calls to underflow() or uflow() will fail. [27.5.2.4.3]/1

Note: Base class version does nothing, returns zero.; The standard adds that the intention is not only that the calls [to underflow or uflow] will not return eof() but that they will return immediately.; The standard adds that the morphemes of showmanyc are es-how-many-see, not show-manic.

Reimplemented in std::basic_filebuf< _CharT, _Traits >, std::basic_filebuf< _CharT, encoding_char_traits< _CharT > >, std::basic_filebuf< char_type, traits_type >, and std::basic_stringbuf< _CharT, _Traits, _Alloc >.

Definition at line 649 of file streambuf.

template<typename _CharT, typename _Traits>

int_type std::basic_streambuf< _CharT, _Traits >::snextc ( )

inlineinherited

Getting the next character.

Returns: The next character, or eof.

Calls sbumpc(), and if that function returns traits::eof(), so does this function. Otherwise, sgetc().

Definition at line 298 of file streambuf.

Referenced by std::ostreambuf_iterator< _CharT, _Traits >::failed(), std::basic_istream< _CharT, _Traits >::get(), std::basic_istream< _CharT, _Traits >::getline(), std::basic_istream< _CharT, _Traits >::ignore(), std::basic_istream< _CharT, _Traits >::sentry::sentry(), and std::basic_streambuf< _CharT, _Traits >::xsputn().

template<typename _CharT, typename _Traits>

int_type std::basic_streambuf< _CharT, _Traits >::sputbackc ( char_type __c )

inlineinherited

Pushing characters back into the input stream.

Parameters

__c	The character to push back.

Returns: The previous character, if possible.

Similar to sungetc(), but __c is pushed onto the stream instead of the previous character. If successful, the next character fetched from the input stream will be __c.

Definition at line 372 of file streambuf.

Referenced by std::basic_istream< _CharT, _Traits >::putback().

template<typename _CharT, typename _Traits>

int_type std::basic_streambuf< _CharT, _Traits >::sputc ( char_type __c )

inlineinherited

Entry point for all single-character output functions.

Parameters

__c	A character to output.

Returns: __c, if possible.

One of two public output functions.

If a write position is available for the output sequence (i.e., the buffer is not full), stores __c in that position, increments the position, and returns traits::to_int_type(__c). If a write position is not available, returns overflow(__c).

Definition at line 424 of file streambuf.

Referenced by std::basic_istream< _CharT, _Traits >::get(), std::ostreambuf_iterator< _CharT, _Traits >::operator=(), and std::basic_streambuf< _CharT, _Traits >::xsputn().

template<typename _CharT, typename _Traits>

streamsize std::basic_streambuf< _CharT, _Traits >::sputn	(	const char_type *	__s,
		streamsize	__n
	)

inlineinherited

Entry point for all single-character output functions.

Parameters

__s	A buffer read area.
__n	A count.

One of two public output functions.

Returns xsputn(__s,__n). The effect is to write __s[0] through __s[__n-1] to the output sequence, if possible.

Definition at line 450 of file streambuf.

Referenced by std::ostreambuf_iterator< _CharT, _Traits >::failed().

template<typename _CharT, typename _Traits>

int_type std::basic_streambuf< _CharT, _Traits >::sungetc ( )

inlineinherited

Moving backwards in the input stream.

Returns: The previous character, if possible.

If a putback position is available, this function decrements the input pointer and returns that character. Otherwise, calls and returns pbackfail(). The effect is to unget the last character gotten.

Definition at line 397 of file streambuf.

Referenced by std::basic_istream< _CharT, _Traits >::unget().

template<typename _CharT, typename _Traits = std::char_traits<_CharT>>

virtual int __gnu_cxx::stdio_sync_filebuf< _CharT, _Traits >::sync ( void )

inlineprotectedvirtual

Synchronizes the buffer arrays with the controlled sequences.

Returns: -1 on failure.

Each derived class provides its own appropriate behavior, including the definition of failure.

Note: Base class version does nothing, returns zero.

Reimplemented from std::basic_streambuf< _CharT, _Traits >.

Definition at line 190 of file stdio_sync_filebuf.h.

References std::ios_base::beg, std::ios_base::cur, std::ios_base::in, and std::ios_base::out.

template<typename _CharT, typename _Traits = std::char_traits<_CharT>>

virtual int_type __gnu_cxx::stdio_sync_filebuf< _CharT, _Traits >::uflow ( )

inlineprotectedvirtual

Fetches more data from the controlled sequence.

Returns: The first character from the pending sequence.

Informally, this function does the same thing as underflow(), and in fact is required to call that function. It also returns the new character, like underflow() does. However, this function also moves the read position forward by one.

Reimplemented from std::basic_streambuf< _CharT, _Traits >.

Definition at line 138 of file stdio_sync_filebuf.h.

template<typename _CharT, typename _Traits = std::char_traits<_CharT>>

virtual int_type __gnu_cxx::stdio_sync_filebuf< _CharT, _Traits >::underflow ( )

inlineprotectedvirtual

Fetches more data from the controlled sequence.

Returns: The first character from the pending sequence.

Informally, this function is called when the input buffer is exhausted (or does not exist, as buffering need not actually be done). If a buffer exists, it is refilled. In either case, the next available character is returned, or traits::eof() to indicate a null pending sequence.

For a formal definition of the pending sequence, see a good text such as Langer & Kreft, or [27.5.2.4.3]/7-14.

A functioning input streambuf can be created by overriding only this function (no buffer area will be used). For an example, see https://gcc.gnu.org/onlinedocs/libstdc++/manual/streambufs.html

Note: Base class version does nothing, returns eof().

Reimplemented from std::basic_streambuf< _CharT, _Traits >.

Definition at line 131 of file stdio_sync_filebuf.h.

template<typename _CharT , typename _Traits >

streamsize std::basic_streambuf< _CharT, _Traits >::xsgetn	(	char_type *	__s,
		streamsize	__n
	)

protectedvirtualinherited

Multiple character extraction.

Parameters

__s	A buffer area.
__n	Maximum number of characters to assign.

Returns: The number of characters assigned.

Fills __s[0] through __s[__n-1] with characters from the input sequence, as if by sbumpc(). Stops when either __n characters have been copied, or when traits::eof() would be copied.

It is expected that derived classes provide a more efficient implementation by overriding this definition.

Reimplemented in std::basic_filebuf< _CharT, _Traits >, std::basic_filebuf< _CharT, encoding_char_traits< _CharT > >, and std::basic_filebuf< char_type, traits_type >.

Definition at line 46 of file streambuf.tcc.

References std::min(), and std::basic_streambuf< _CharT, _Traits >::xsputn().

Referenced by std::basic_filebuf< _CharT, _Traits >::xsgetn().

template<typename _CharT , typename _Traits >

streamsize std::basic_streambuf< _CharT, _Traits >::xsputn	(	const char_type *	__s,
		streamsize	__n
	)

protectedvirtualinherited

Multiple character insertion.

Parameters

__s	A buffer area.
__n	Maximum number of characters to write.

Returns: The number of characters written.

Writes __s[0] through __s[__n-1] to the output sequence, as if by sputc(). Stops when either n characters have been copied, or when sputc() would return traits::eof().

It is expected that derived classes provide a more efficient implementation by overriding this definition.

Reimplemented in std::basic_filebuf< _CharT, _Traits >, std::basic_filebuf< _CharT, encoding_char_traits< _CharT > >, and std::basic_filebuf< char_type, traits_type >.

Definition at line 80 of file streambuf.tcc.

References std::min(), std::basic_streambuf< _CharT, _Traits >::sgetc(), std::basic_streambuf< _CharT, _Traits >::snextc(), and std::basic_streambuf< _CharT, _Traits >::sputc().

Referenced by std::basic_streambuf< _CharT, _Traits >::xsgetn(), and std::basic_filebuf< _CharT, _Traits >::xsputn().

Member Data Documentation

template<typename _CharT, typename _Traits>

locale std::basic_streambuf< _CharT, _Traits >::_M_buf_locale

protectedinherited

Current locale setting.

Definition at line 192 of file streambuf.

Referenced by std::basic_filebuf< _CharT, _Traits >::basic_filebuf().

template<typename _CharT, typename _Traits>

char_type* std::basic_streambuf< _CharT, _Traits >::_M_in_beg

protectedinherited

Start of get area.

Definition at line 184 of file streambuf.

template<typename _CharT, typename _Traits>

char_type* std::basic_streambuf< _CharT, _Traits >::_M_in_cur

protectedinherited

Current read area.

Definition at line 185 of file streambuf.

template<typename _CharT, typename _Traits>

char_type* std::basic_streambuf< _CharT, _Traits >::_M_in_end

protectedinherited

End of get area.

Definition at line 186 of file streambuf.

template<typename _CharT, typename _Traits>

char_type* std::basic_streambuf< _CharT, _Traits >::_M_out_beg

protectedinherited

Start of put area.

Definition at line 187 of file streambuf.

template<typename _CharT, typename _Traits>

char_type* std::basic_streambuf< _CharT, _Traits >::_M_out_cur

protectedinherited

Current put area.

Definition at line 188 of file streambuf.

template<typename _CharT, typename _Traits>

char_type* std::basic_streambuf< _CharT, _Traits >::_M_out_end

protectedinherited

End of put area.

Definition at line 189 of file streambuf.

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

stdio_sync_filebuf.h

Public Types

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

template<typename _CharT, typename _Traits = std::char_traits<_CharT>> class __gnu_cxx::stdio_sync_filebuf< _CharT, _Traits >

Member Function Documentation

Member Data Documentation

template<typename _CharT, typename _Traits = std::char_traits<_CharT>>
class __gnu_cxx::stdio_sync_filebuf< _CharT, _Traits >