Poster of Linux kernelThe best gift for a Linux geek
__gnu_cxx::stdio_sync_filebuf

__gnu_cxx::stdio_sync_filebuf

Section: C Library Functions (3) Updated: 27 Aug 2009
Local index Up
 

NAME

__gnu_cxx::stdio_sync_filebuf -

class stdio_sync_filebuf.

 

SYNOPSIS


Inherits std::basic_streambuf< _CharT, _Traits >.  

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


std::__c_file *const file ()

streamsize in_avail ()

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)

stdio_sync_filebuf (std::__c_file *__f)

void stossc ()

int_type sungetc ()

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

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

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

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

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

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

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

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

Protected Member Functions


void gbump (int __n)

virtual void imbue (const locale &)

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

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 seekpos (pos_type, 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 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 ()

virtual int sync ()

int_type syncgetc ()

int_type syncputc (int_type __c)

int_type syncungetc (int_type __c)

virtual int_type uflow ()

virtual int_type underflow ()

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

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

Friends


streamsize __copy_streambufs (__streambuf_type *__sbin, __streambuf_type *__sbout)

class basic_ios< char_type, traits_type >

class basic_istream< char_type, traits_type >

class basic_ostream< char_type, traits_type >

template<typename _CharT2 , typename _Traits2 , typename _Alloc > basic_istream< _CharT2, _Traits2 > & getline (basic_istream< _CharT2, _Traits2 > &, basic_string< _CharT2, _Traits2, _Alloc > &, _CharT2)

class istreambuf_iterator< char_type, traits_type >

template<typename _CharT2 , typename _Traits2 , typename _Alloc > basic_istream< _CharT2, _Traits2 > & operator>> (basic_istream< _CharT2, _Traits2 > &, basic_string< _CharT2, _Traits2, _Alloc > &)

template<typename _CharT2 , typename _Traits2 > basic_istream< _CharT2, _Traits2 > & operator>> (basic_istream< _CharT2, _Traits2 > &, _CharT2 *)

class ostreambuf_iterator< char_type, traits_type >

typedef basic_streambuf< char_type, traits_type > __streambuf_type

locale getloc () const

locale pubimbue (const locale &__loc)

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)

__streambuf_type * pubsetbuf (char_type *__s, streamsize __n)

int pubsync ()

char_type * eback () const

char_type * egptr () const

char_type * epptr () const

char_type * gptr () const

char_type * pbase () const

char_type * pptr () const

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 >

Definition at line 51 of file stdio_sync_filebuf.h.  

Member Typedef Documentation

 

typedef basic_streambuf<char_type, traits_type> __streambuf_type [inherited]

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.

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

Definition at line 144 of file streambuf.  

typedef _CharT char_typeThese are standard types. They permit a standardized way of referring to names of (or names dependant on) the template parameters, which are specific to the implementation.

Reimplemented from basic_streambuf< _CharT, _Traits >.

Definition at line 55 of file stdio_sync_filebuf.h.  

typedef traits_type::int_type int_type

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.

Reimplemented from basic_streambuf< _CharT, _Traits >.

Definition at line 57 of file stdio_sync_filebuf.h.  

typedef traits_type::off_type off_type

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.

Reimplemented from basic_streambuf< _CharT, _Traits >.

Definition at line 59 of file stdio_sync_filebuf.h.  

typedef traits_type::pos_type pos_type

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.

Reimplemented from basic_streambuf< _CharT, _Traits >.

Definition at line 58 of file stdio_sync_filebuf.h.  

typedef _Traits traits_type

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.

Reimplemented from basic_streambuf< _CharT, _Traits >.

Definition at line 56 of file stdio_sync_filebuf.h.  

Member Function Documentation

 

char_type* eback () const [inline, protected, inherited]

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 465 of file streambuf.

Referenced by basic_filebuf< _CharT, _Traits >::imbue(), basic_stringbuf< _CharT, _Traits, _Alloc >::overflow(), basic_stringbuf< _CharT, _Traits, _Alloc >::pbackfail(), basic_filebuf< _CharT, _Traits >::pbackfail(), basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff(), basic_filebuf< _CharT, _Traits >::seekoff(), basic_stringbuf< _CharT, _Traits, _Alloc >::seekpos(), basic_streambuf< char_type, traits_type >::sputbackc(), basic_streambuf< char_type, traits_type >::sungetc(), basic_filebuf< _CharT, _Traits >::underflow(), and basic_filebuf< _CharT, _Traits >::xsgetn().  

char_type* egptr () const [inline, protected, inherited]

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 471 of file streambuf.

Referenced by basic_streambuf< char_type, traits_type >::in_avail(), basic_streambuf< char_type, traits_type >::sbumpc(), basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff(), basic_filebuf< _CharT, _Traits >::seekoff(), basic_stringbuf< _CharT, _Traits, _Alloc >::seekpos(), basic_streambuf< char_type, traits_type >::sgetc(), basic_stringbuf< _CharT, _Traits, _Alloc >::showmanyc(), basic_filebuf< _CharT, _Traits >::showmanyc(), basic_streambuf< char_type, traits_type >::stossc(), basic_stringbuf< _CharT, _Traits, _Alloc >::str(), basic_stringbuf< _CharT, _Traits, _Alloc >::underflow(), basic_filebuf< _CharT, _Traits >::underflow(), basic_streambuf< _CharT, _Traits >::xsgetn(), and basic_filebuf< _CharT, _Traits >::xsgetn().  

char_type* epptr () const [inline, protected, inherited]

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 518 of file streambuf.

Referenced by basic_stringbuf< _CharT, _Traits, _Alloc >::overflow(), basic_streambuf< char_type, traits_type >::sputc(), basic_streambuf< _CharT, _Traits >::xsputn(), and basic_filebuf< _CharT, _Traits >::xsputn().  

std::__c_file* const 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 83 of file stdio_sync_filebuf.h.  

void gbump (int __n) [inline, protected, inherited]

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 481 of file streambuf.

Referenced by basic_stringbuf< _CharT, _Traits, _Alloc >::pbackfail(), basic_filebuf< _CharT, _Traits >::pbackfail(), basic_streambuf< char_type, traits_type >::sbumpc(), basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff(), basic_stringbuf< _CharT, _Traits, _Alloc >::seekpos(), basic_streambuf< char_type, traits_type >::sputbackc(), basic_streambuf< char_type, traits_type >::stossc(), basic_streambuf< char_type, traits_type >::sungetc(), basic_streambuf< char_type, traits_type >::uflow(), basic_streambuf< _CharT, _Traits >::xsgetn(), and basic_filebuf< _CharT, _Traits >::xsgetn().  

locale getloc () const [inline, inherited]

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 228 of file streambuf.

Referenced by basic_streambuf< char_type, traits_type >::pubimbue().  

char_type* gptr () const [inline, protected, inherited]

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 468 of file streambuf.

Referenced by basic_filebuf< _CharT, _Traits >::imbue(), basic_streambuf< char_type, traits_type >::in_avail(), basic_stringbuf< _CharT, _Traits, _Alloc >::overflow(), basic_stringbuf< _CharT, _Traits, _Alloc >::pbackfail(), basic_filebuf< _CharT, _Traits >::pbackfail(), basic_streambuf< char_type, traits_type >::sbumpc(), basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff(), basic_filebuf< _CharT, _Traits >::seekoff(), basic_stringbuf< _CharT, _Traits, _Alloc >::seekpos(), basic_streambuf< char_type, traits_type >::sgetc(), basic_stringbuf< _CharT, _Traits, _Alloc >::showmanyc(), basic_filebuf< _CharT, _Traits >::showmanyc(), basic_streambuf< char_type, traits_type >::sputbackc(), basic_streambuf< char_type, traits_type >::stossc(), basic_streambuf< char_type, traits_type >::sungetc(), basic_streambuf< char_type, traits_type >::uflow(), basic_stringbuf< _CharT, _Traits, _Alloc >::underflow(), basic_filebuf< _CharT, _Traits >::underflow(), basic_streambuf< _CharT, _Traits >::xsgetn(), and basic_filebuf< _CharT, _Traits >::xsgetn().  

virtual void imbue (const locale &) [inline, protected, virtual, inherited]

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 basic_filebuf< _CharT, _Traits >, and basic_filebuf< char_type, traits_type >.

Definition at line 559 of file streambuf.

Referenced by basic_streambuf< char_type, traits_type >::pubimbue().  

streamsize in_avail () [inline, inherited]

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 268 of file streambuf.  

virtual int_type overflow (int_type = traits_type::eof()) [inline, protected, virtual]

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 definiton 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 basic_streambuf< _CharT, _Traits >.

Definition at line 136 of file stdio_sync_filebuf.h.  

virtual int_type pbackfail (int_type = traits_type::eof()) [inline, protected, virtual]

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 basic_streambuf< _CharT, _Traits >.

Definition at line 111 of file stdio_sync_filebuf.h.  

char_type* pbase () const [inline, protected, inherited]

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 512 of file streambuf.

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

void pbump (int __n) [inline, protected, inherited]

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 528 of file streambuf.

Referenced by basic_filebuf< _CharT, _Traits >::overflow(), basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff(), basic_stringbuf< _CharT, _Traits, _Alloc >::seekpos(), basic_streambuf< char_type, traits_type >::sputc(), and basic_streambuf< _CharT, _Traits >::xsputn().  

char_type* pptr () const [inline, protected, inherited]

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 515 of file streambuf.

Referenced by basic_stringbuf< _CharT, _Traits, _Alloc >::overflow(), basic_filebuf< _CharT, _Traits >::overflow(), basic_stringbuf< _CharT, _Traits, _Alloc >::seekoff(), basic_stringbuf< _CharT, _Traits, _Alloc >::seekpos(), basic_streambuf< char_type, traits_type >::sputc(), basic_stringbuf< _CharT, _Traits, _Alloc >::str(), basic_filebuf< _CharT, _Traits >::sync(), basic_streambuf< _CharT, _Traits >::xsputn(), and basic_filebuf< _CharT, _Traits >::xsputn().  

locale pubimbue (const locale & __loc) [inline, inherited]

Entry point for imbue(). Parameters:

loc The new locale.

Returns:

The previous locale.

Calls the derived imbue(loc).

Definition at line 211 of file streambuf.  

pos_type pubseekoff (off_type __off, ios_base::seekdir __way, ios_base::openmode __mode = ios_base::in | ios_base::out) [inline, inherited]

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 245 of file streambuf.  

pos_type pubseekpos (pos_type __sp, ios_base::openmode __mode = ios_base::in | ios_base::out) [inline, inherited]

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 250 of file streambuf.  

__streambuf_type* pubsetbuf (char_type * __s, streamsize __n) [inline, inherited]

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 241 of file streambuf.  

int pubsync () [inline, inherited]

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 255 of file streambuf.

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

int_type sbumpc () [inline, inherited]

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 300 of file streambuf.

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

virtual pos_type seekoff (off_type, ios_base::seekdir, ios_base::openmode = ios_base::in | ios_base::out) [inline, protected, virtual, inherited]

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 basic_filebuf< _CharT, _Traits >, basic_stringbuf< _CharT, _Traits, _Alloc >, and basic_filebuf< char_type, traits_type >.

Definition at line 585 of file streambuf.

Referenced by basic_streambuf< char_type, traits_type >::pubseekoff().  

virtual pos_type seekpos (pos_type, ios_base::openmode = ios_base::in | ios_base::out) [inline, protected, virtual, inherited]

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 basic_filebuf< _CharT, _Traits >, basic_stringbuf< _CharT, _Traits, _Alloc >, and basic_filebuf< char_type, traits_type >.

Definition at line 597 of file streambuf.

Referenced by basic_streambuf< char_type, traits_type >::pubseekpos().  

virtual basic_streambuf<char_type,_Traits>* setbuf (char_type *, streamsize) [inline, protected, virtual, inherited]

Maniuplates the buffer. Each derived class provides its own appropriate behavior. See the next-to-last paragraph of http://gcc.gnu.org/onlinedocs/libstdc++/27_io/howto.html#2 for more on this function.

Note:

Base class version does nothing, returns this.

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

Definition at line 574 of file streambuf.

Referenced by basic_streambuf< char_type, traits_type >::pubsetbuf().  

void setg (char_type * __gbeg, char_type * __gnext, char_type * __gend) [inline, protected, inherited]

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 492 of file streambuf.  

void setp (char_type * __pbeg, char_type * __pend) [inline, protected, inherited]

Setting the three write area pointers. Parameters:

pbeg A pointer.
pend A pointer.

Postcondition:

pbeg == pbase(), pbeg == pptr(), and pend == epptr()

Definition at line 538 of file streambuf.  

int_type sgetc () [inline, inherited]

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 322 of file streambuf.

Referenced by basic_istream< _CharT, _Traits >::get(), basic_istream< _CharT, _Traits >::getline(), basic_istream< _CharT, _Traits >::ignore(), sentry::sentry(), and basic_streambuf< char_type, traits_type >::snextc().  

streamsize sgetn (char_type * __s, streamsize __n) [inline, inherited]

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 341 of file streambuf.  

virtual streamsize showmanyc () [inline, protected, virtual, inherited]

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 @c showmanyc are
         'es-how-many-see', not 'show-manic. 

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

Definition at line 632 of file streambuf.

Referenced by basic_streambuf< char_type, traits_type >::in_avail().  

int_type snextc () [inline, inherited]

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 282 of file streambuf.

Referenced by basic_istream< _CharT, _Traits >::get(), basic_istream< _CharT, _Traits >::getline(), basic_istream< _CharT, _Traits >::ignore(), and sentry::sentry().  

int_type sputbackc (char_type __c) [inline, inherited]

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 355 of file streambuf.

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

int_type sputc (char_type __c) [inline, inherited]

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 407 of file streambuf.

Referenced by basic_istream< _CharT, _Traits >::get(), ostreambuf_iterator< _CharT, _Traits >::operator=(), and basic_stringbuf< _CharT, _Traits, _Alloc >::overflow().  

streamsize sputn (const char_type * __s, streamsize __n) [inline, inherited]

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 433 of file streambuf.  

void stossc () [inline, inherited]

Tosses a character. Advances the read pointer, ignoring the character that would have been read.

See http://gcc.gnu.org/ml/libstdc++/2002-05/msg00168.html

Note:

This function has been deprecated by the standard. You must define _GLIBCXX_DEPRECATED to make this visible; see c++config.h.

Definition at line 769 of file streambuf.  

int_type sungetc () [inline, inherited]

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 380 of file streambuf.

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

virtual int sync () [inline, protected, virtual]

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 basic_streambuf< _CharT, _Traits >.

Definition at line 155 of file stdio_sync_filebuf.h.  

virtual int_type uflow () [inline, protected, virtual]

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 basic_streambuf< _CharT, _Traits >.

Definition at line 103 of file stdio_sync_filebuf.h.  

virtual int_type underflow () [inline, protected, virtual]

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 definiton 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 http://gcc.gnu.org/onlinedocs/libstdc++/27_io/howto.html#6

Note:

Base class version does nothing, returns eof().

Reimplemented from basic_streambuf< _CharT, _Traits >.

Definition at line 96 of file stdio_sync_filebuf.h.  

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

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 from basic_streambuf< _CharT, _Traits >.  

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

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 from basic_streambuf< _CharT, _Traits >.  

Member Data Documentation

 

locale _M_buf_locale [protected, inherited]

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 194 of file streambuf.

Referenced by basic_filebuf< _CharT, _Traits >::basic_filebuf(), basic_streambuf< char_type, traits_type >::getloc(), and basic_streambuf< char_type, traits_type >::pubimbue().  

char_type* _M_in_beg [protected, inherited]

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 182 of file streambuf.

Referenced by basic_streambuf< char_type, traits_type >::eback(), and basic_streambuf< char_type, traits_type >::setg().  

char_type* _M_in_cur [protected, inherited]

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 183 of file streambuf.

Referenced by basic_streambuf< char_type, traits_type >::gbump(), basic_streambuf< char_type, traits_type >::gptr(), and basic_streambuf< char_type, traits_type >::setg().  

char_type* _M_in_end [protected, inherited]

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 184 of file streambuf.

Referenced by basic_streambuf< char_type, traits_type >::egptr(), and basic_streambuf< char_type, traits_type >::setg().  

char_type* _M_out_beg [protected, inherited]

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 185 of file streambuf.

Referenced by basic_streambuf< char_type, traits_type >::pbase(), and basic_streambuf< char_type, traits_type >::setp().  

char_type* _M_out_cur [protected, inherited]

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 186 of file streambuf.

Referenced by basic_streambuf< char_type, traits_type >::pbump(), basic_streambuf< char_type, traits_type >::pptr(), and basic_streambuf< char_type, traits_type >::setp().  

char_type* _M_out_end [protected, inherited]

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 187 of file streambuf.

Referenced by basic_streambuf< char_type, traits_type >::epptr(), and basic_streambuf< char_type, traits_type >::setp().

 

Author

Generated automatically by Doxygen for libstdc++ from the source code.


 

Index

NAME
SYNOPSIS
Public Types
Public Member Functions
Protected Member Functions
Friends
Detailed Description
template<typename _CharT, typename _Traits = std::char_traits<_CharT>> class __gnu_cxx::stdio_sync_filebuf< _CharT, _Traits >
Member Typedef Documentation
typedef basic_streambuf<char_type, traits_type> __streambuf_type [inherited]
typedef _CharT char_typeThese are standard types. They permit a standardized way of referring to names of (or names dependant on) the template parameters, which are specific to the implementation.
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
Member Function Documentation
char_type* eback () const [inline, protected, inherited]
char_type* egptr () const [inline, protected, inherited]
char_type* epptr () const [inline, protected, inherited]
std::__c_file* const file () [inline]Returns:
void gbump (int __n) [inline, protected, inherited]
locale getloc () const [inline, inherited]
char_type* gptr () const [inline, protected, inherited]
virtual void imbue (const locale &) [inline, protected, virtual, inherited]
streamsize in_avail () [inline, inherited]
virtual int_type overflow (int_type = traits_type::eof()) [inline, protected, virtual]
virtual int_type pbackfail (int_type = traits_type::eof()) [inline, protected, virtual]
char_type* pbase () const [inline, protected, inherited]
void pbump (int __n) [inline, protected, inherited]
char_type* pptr () const [inline, protected, inherited]
locale pubimbue (const locale & __loc) [inline, inherited]
pos_type pubseekoff (off_type __off, ios_base::seekdir __way, ios_base::openmode __mode = ios_base::in | ios_base::out) [inline, inherited]
pos_type pubseekpos (pos_type __sp, ios_base::openmode __mode = ios_base::in | ios_base::out) [inline, inherited]
__streambuf_type* pubsetbuf (char_type * __s, streamsize __n) [inline, inherited]
int pubsync () [inline, inherited]
int_type sbumpc () [inline, inherited]
virtual pos_type seekoff (off_type, ios_base::seekdir, ios_base::openmode = ios_base::in | ios_base::out) [inline, protected, virtual, inherited]
virtual pos_type seekpos (pos_type, ios_base::openmode = ios_base::in | ios_base::out) [inline, protected, virtual, inherited]
virtual basic_streambuf<char_type,_Traits>* setbuf (char_type *, streamsize) [inline, protected, virtual, inherited]
void setg (char_type * __gbeg, char_type * __gnext, char_type * __gend) [inline, protected, inherited]
void setp (char_type * __pbeg, char_type * __pend) [inline, protected, inherited]
int_type sgetc () [inline, inherited]
streamsize sgetn (char_type * __s, streamsize __n) [inline, inherited]
virtual streamsize showmanyc () [inline, protected, virtual, inherited]
int_type snextc () [inline, inherited]
int_type sputbackc (char_type __c) [inline, inherited]
int_type sputc (char_type __c) [inline, inherited]
streamsize sputn (const char_type * __s, streamsize __n) [inline, inherited]
void stossc () [inline, inherited]
int_type sungetc () [inline, inherited]
virtual int sync () [inline, protected, virtual]
virtual int_type uflow () [inline, protected, virtual]
virtual int_type underflow () [inline, protected, virtual]
virtual std::streamsize xsgetn (char_type * __s, std::streamsize __n) [protected, virtual]
virtual std::streamsize xsputn (const char_type * __s, std::streamsize __n) [protected, virtual]
Member Data Documentation
locale _M_buf_locale [protected, inherited]
char_type* _M_in_beg [protected, inherited]
char_type* _M_in_cur [protected, inherited]
char_type* _M_in_end [protected, inherited]
char_type* _M_out_beg [protected, inherited]
char_type* _M_out_cur [protected, inherited]
char_type* _M_out_end [protected, inherited]
Author

This document was created by man2html, using the manual pages.
Time: 22:37:27 GMT, April 16, 2011