libstdc++
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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 |
typedef basic_streambuf < char_type, traits_type > | __streambuf_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 () |
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 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 () |
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 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) |
char_type * | eback () const |
char_type * | gptr () const |
char_type * | egptr () const |
char_type * | pbase () const |
char_type * | pptr () const |
char_type * | epptr () const |
locale | pubimbue (const locale &__loc) |
locale | getloc () const |
__streambuf_type * | 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 () |
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 |
locale | _M_buf_locale |
class stdio_sync_filebuf.
Definition at line 47 of file stdio_sync_filebuf.h.
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inherited |
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inlineprotectedinherited |
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inlineprotectedinherited |
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inlineprotectedinherited |
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inline |
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 79 of file stdio_sync_filebuf.h.
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inlineprotectedinherited |
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inlineinherited |
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inlineprotectedinherited |
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inlineprotectedvirtualinherited |
Changes translations.
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."
Reimplemented in std::basic_filebuf< _CharT, _Traits >, std::basic_filebuf< _CharT, encoding_char_traits< _CharT > >, and std::basic_filebuf< char_type, traits_type >.
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inlineinherited |
Looking ahead into the stream.
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()
.
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inlineprotectedvirtual |
Consumes data from the buffer; writes to the controlled sequence.
c | An additional character to consume. |
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).
Reimplemented from std::basic_streambuf< _CharT, _Traits >.
Definition at line 132 of file stdio_sync_filebuf.h.
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inlineprotectedvirtual |
Tries to back up the input sequence.
c | The character to be inserted back into the sequence. |
gptr()
, eback()
, and pptr()
are the same as for underflow()
.Reimplemented from std::basic_streambuf< _CharT, _Traits >.
Definition at line 107 of file stdio_sync_filebuf.h.
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inlineprotectedinherited |
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inlineprotectedinherited |
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inlineprotectedinherited |
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inlineinherited |
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inlineinherited |
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inlineinherited |
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inlineinherited |
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inlineinherited |
Entry point for imbue().
loc | The new locale. |
Calls the derived imbue(loc).
Definition at line 248 of file streambuf.
Referenced by std::basic_istream< _CharT, _Traits >::sync().
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inlineinherited |
Getting the next character.
If the input read position is available, returns that character and increments the read pointer, otherwise calls and returns uflow()
.
Definition at line 293 of file streambuf.
Referenced by std::basic_istream< _CharT, _Traits >::getline(), std::basic_istream< _CharT, _Traits >::ignore(), and std::istreambuf_iterator< _CharT, _Traits >::operator++().
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inlineprotectedvirtualinherited |
Alters the stream positions.
Each derived class provides its own appropriate behavior.
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 >.
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inlineprotectedvirtualinherited |
Alters the stream positions.
Each derived class provides its own appropriate behavior.
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 >.
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inlineprotectedvirtualinherited |
Manipulates the buffer.
Each derived class provides its own appropriate behavior. See the next-to-last paragraph of http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt11ch25s02.html for more on this function.
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 >.
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inlineprotectedinherited |
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inlineinherited |
Getting the next character.
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 315 of file streambuf.
Referenced by std::basic_istream< _CharT, _Traits >::get(), std::basic_istream< _CharT, _Traits >::getline(), std::basic_istream< _CharT, _Traits >::ignore(), and std::basic_istream< _CharT, _Traits >::sentry::sentry().
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inlineinherited |
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inlineprotectedvirtualinherited |
Investigating the data available.
"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
eof()
but that they will return "immediately". 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 >.
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inlineinherited |
Getting the next character.
Calls sbumpc()
, and if that function returns traits::eof()
, so does this function. Otherwise, sgetc()
.
Definition at line 275 of file streambuf.
Referenced by std::basic_istream< _CharT, _Traits >::get(), std::basic_istream< _CharT, _Traits >::getline(), std::basic_istream< _CharT, _Traits >::ignore(), and std::basic_istream< _CharT, _Traits >::sentry::sentry().
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Pushing characters back into the input stream.
c | The character to push back. |
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 348 of file streambuf.
Referenced by std::basic_istream< _CharT, _Traits >::putback().
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Entry point for all single-character output functions.
c | A character to output. |
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 400 of file streambuf.
Referenced by std::basic_istream< _CharT, _Traits >::get(), and std::ostreambuf_iterator< _CharT, _Traits >::operator=().
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inlineinherited |
Tosses a character.
Advances the read pointer, ignoring the character that would have been read.
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inlineinherited |
Moving backwards in the input stream.
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 373 of file streambuf.
Referenced by std::basic_istream< _CharT, _Traits >::unget().
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inlineprotectedvirtual |
Synchronizes the buffer arrays with the controlled sequences.
Each derived class provides its own appropriate behavior, including the definition of "failure".
Reimplemented from std::basic_streambuf< _CharT, _Traits >.
Definition at line 151 of file stdio_sync_filebuf.h.
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inlineprotectedvirtual |
Fetches more data from the controlled 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 99 of file stdio_sync_filebuf.h.
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inlineprotectedvirtual |
Fetches more data from the controlled 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 http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt11ch25.html
Reimplemented from std::basic_streambuf< _CharT, _Traits >.
Definition at line 92 of file stdio_sync_filebuf.h.
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protectedvirtual |
Multiple character extraction.
s | A buffer area. |
n | Maximum number of characters to assign. |
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 std::basic_streambuf< _CharT, _Traits >.
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protectedvirtual |
Multiple character insertion.
s | A buffer area. |
n | Maximum number of characters to write. |
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 std::basic_streambuf< _CharT, _Traits >.
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Current locale setting.
Definition at line 187 of file streambuf.
Referenced by std::basic_filebuf< _CharT, _Traits >::basic_filebuf().
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