libstdc++
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#include <sstream>
Public Types | |
typedef __string_type::size_type | __size_type |
typedef basic_streambuf< char_type, traits_type > | __streambuf_type |
typedef basic_string< char_type, _Traits, _Alloc > | __string_type |
typedef _Alloc | allocator_type |
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 |
Protected Attributes | |
locale | _M_buf_locale |
char_type * | _M_in_beg |
char_type * | _M_in_cur |
char_type * | _M_in_end |
ios_base::openmode | _M_mode |
char_type * | _M_out_beg |
char_type * | _M_out_cur |
char_type * | _M_out_end |
__string_type | _M_string |
The actual work of input and output (for std::string).
_CharT | Type of character stream. |
_Traits | Traits for character type, defaults to char_traits<_CharT>. |
_Alloc | Allocator type, defaults to allocator<_CharT>. |
This class associates either or both of its input and output sequences with a sequence of characters, which can be initialized from, or made available as, a std::basic_string
. (Paraphrased from [27.7.1]/1.)
For this class, open modes (of type ios_base::openmode
) have in
set if the input sequence can be read, and out
set if the output sequence can be written.
typedef __string_type::size_type std::basic_stringbuf< _CharT, _Traits, _Alloc >::__size_type |
typedef basic_streambuf<char_type, traits_type> std::basic_stringbuf< _CharT, _Traits, _Alloc >::__streambuf_type |
typedef basic_string<char_type, _Traits, _Alloc> std::basic_stringbuf< _CharT, _Traits, _Alloc >::__string_type |
typedef _Alloc std::basic_stringbuf< _CharT, _Traits, _Alloc >::allocator_type |
typedef _CharT std::basic_stringbuf< _CharT, _Traits, _Alloc >::char_type |
typedef traits_type::int_type std::basic_stringbuf< _CharT, _Traits, _Alloc >::int_type |
typedef traits_type::off_type std::basic_stringbuf< _CharT, _Traits, _Alloc >::off_type |
typedef traits_type::pos_type std::basic_stringbuf< _CharT, _Traits, _Alloc >::pos_type |
typedef _Traits std::basic_stringbuf< _CharT, _Traits, _Alloc >::traits_type |
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inline |
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inlineexplicit |
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inlineexplicit |
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inline |
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inlineprotectedinherited |
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inlineprotectedinherited |
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protected |
Definition at line 276 of file sstream.tcc.
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inlineprotected |
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protected |
Definition at line 245 of file sstream.tcc.
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inlineprotected |
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inlineprotectedinherited |
Access to the get area.
These functions are only available to other protected functions, including derived classes.
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inlineprotectedinherited |
Access to the get area.
These functions are only available to other protected functions, including derived classes.
Definition at line 493 of file streambuf.
Referenced by std::wbuffer_convert< _Codecvt, _Elem, _Tr >::underflow().
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inlineprotectedinherited |
Access to the put area.
These functions are only available to other protected functions, including derived classes.
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inlineprotectedinherited |
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inlineinherited |
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inlineprotectedinherited |
Access to the get area.
These functions are only available to other protected functions, including derived classes.
Definition at line 490 of file streambuf.
Referenced by std::wbuffer_convert< _Codecvt, _Elem, _Tr >::underflow().
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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 > >, std::basic_filebuf< _CharT, std::char_traits< _CharT > >, and std::basic_filebuf< char_type, traits_type >.
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inlineinherited |
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inline |
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protectedvirtual |
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 79 of file sstream.tcc.
References std::ios_base::in, std::max(), std::min(), and std::ios_base::out.
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protectedvirtual |
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 45 of file sstream.tcc.
References std::ios_base::out.
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inlineprotectedinherited |
Access to the put area.
These functions are only available to other protected functions, including derived classes.
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inlineprotectedinherited |
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inlineprotectedinherited |
Access to the put area.
These functions are only available to other protected functions, including derived classes.
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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 |
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inlineinherited |
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protectedvirtual |
Alters the stream positions.
Each derived class provides its own appropriate behavior.
pos_type
that represents an invalid stream position. Reimplemented from std::basic_streambuf< _CharT, _Traits >.
Definition at line 167 of file sstream.tcc.
References std::ios_base::cur, std::ios_base::end, std::ios_base::in, and std::ios_base::out.
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protectedvirtual |
Alters the stream positions.
Each derived class provides its own appropriate behavior.
pos_type
that represents an invalid stream position. Reimplemented from std::basic_streambuf< _CharT, _Traits >.
Definition at line 215 of file sstream.tcc.
References std::ios_base::in, and std::ios_base::out.
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inlineprotectedvirtual |
Manipulates the buffer.
__s | Pointer to a buffer area. |
__n | Size of __s. |
this
If no buffer has already been created, and both __s and __n are non-zero, then __s
is used as a buffer; see https://gcc.gnu.org/onlinedocs/libstdc++/manual/streambufs.html#io.streambuf.buffering for more.
Reimplemented from std::basic_streambuf< _CharT, _Traits >.
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inlineprotectedinherited |
Setting the three read area pointers.
__gbeg | A pointer. |
__gnext | A pointer. |
__gend | A pointer. |
eback()
, __gnext == gptr()
, and __gend == egptr()
Definition at line 514 of file streambuf.
Referenced by std::wbuffer_convert< _Codecvt, _Elem, _Tr >::wbuffer_convert().
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inlineprotectedinherited |
Setting the three write area pointers.
__pbeg | A pointer. |
__pend | A pointer. |
pbase()
, __pbeg == pptr()
, and __pend == epptr()
Definition at line 560 of file streambuf.
Referenced by std::wbuffer_convert< _Codecvt, _Elem, _Tr >::wbuffer_convert().
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inlineinherited |
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inlineinherited |
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inlineprotectedvirtual |
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. showmanyc
are es-how-many-see, not show-manic. Reimplemented from std::basic_streambuf< _CharT, _Traits >.
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inlineinherited |
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inlineinherited |
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.
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inlineinherited |
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 429 of file streambuf.
Referenced by std::wbuffer_convert< _Codecvt, _Elem, _Tr >::overflow().
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inlineinherited |
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inline |
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inline |
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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.
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inlineprotectedinherited |
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inlinenoexcept |
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inlineprotectedvirtualinherited |
Synchronizes the buffer arrays with the controlled sequences.
Each derived class provides its own appropriate behavior, including the definition of failure.
Reimplemented in std::wbuffer_convert< _Codecvt, _Elem, _Tr >, __gnu_cxx::stdio_sync_filebuf< _CharT, _Traits >, std::basic_filebuf< _CharT, _Traits >, std::basic_filebuf< _CharT, encoding_char_traits< _CharT > >, std::basic_filebuf< _CharT, std::char_traits< _CharT > >, and std::basic_filebuf< char_type, traits_type >.
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inlineprotectedvirtualinherited |
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 in __gnu_cxx::stdio_sync_filebuf< _CharT, _Traits >.
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protectedvirtual |
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 https://gcc.gnu.org/onlinedocs/libstdc++/manual/streambufs.html
Reimplemented from std::basic_streambuf< _CharT, _Traits >.
Definition at line 149 of file sstream.tcc.
References std::ios_base::in.
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inlinenoexcept |
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protectedvirtualinherited |
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 in std::basic_filebuf< _CharT, _Traits >, std::basic_filebuf< _CharT, encoding_char_traits< _CharT > >, std::basic_filebuf< _CharT, std::char_traits< _CharT > >, and std::basic_filebuf< char_type, traits_type >.
Definition at line 45 of file streambuf.tcc.
References std::min().
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protectedvirtualinherited |
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 in std::basic_filebuf< _CharT, _Traits >, std::basic_filebuf< _CharT, encoding_char_traits< _CharT > >, std::basic_filebuf< _CharT, std::char_traits< _CharT > >, and std::basic_filebuf< char_type, traits_type >.
Definition at line 79 of file streambuf.tcc.
References std::min().
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protectedinherited |
Current locale setting.
Definition at line 197 of file streambuf.
Referenced by std::basic_filebuf< _CharT, _Traits >::basic_filebuf().
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protectedinherited |
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protectedinherited |
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protectedinherited |
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protected |
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protectedinherited |
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protectedinherited |
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protectedinherited |
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protected |