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void | __safe_gbump (streamsize __n) |
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void | __safe_pbump (streamsize __n) |
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| void | gbump (int __n) |
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| virtual void | imbue (const locale &__loc) |
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virtual int_type | overflow (int_type __c=traits_type::eof()) |
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| virtual int_type | overflow (int_type __c=traits_type::eof()) |
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virtual int_type | pbackfail (int_type __c=traits_type::eof()) |
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| virtual int_type | pbackfail (int_type __c=traits_type::eof()) |
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| void | pbump (int __n) |
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| virtual pos_type | seekoff (off_type, ios_base::seekdir, ios_base::openmode=ios_base::in|ios_base::out) |
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virtual std::streampos | seekoff (std::streamoff __off, std::ios_base::seekdir __dir, std::ios_base::openmode=std::ios_base::in|std::ios_base::out) |
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| virtual std::streampos | seekpos (std::streampos __pos, std::ios_base::openmode __mode=std::ios_base::in|std::ios_base::out) |
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| virtual basic_streambuf< char_type, std::char_traits< _CharT > > * | setbuf (char_type *, streamsize) |
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| void | setg (char_type *__gbeg, char_type *__gnext, char_type *__gend) |
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| void | setp (char_type *__pbeg, char_type *__pend) |
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| virtual streamsize | showmanyc () |
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void | swap (basic_streambuf &__sb) |
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| virtual int | sync () |
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int_type | syncgetc () |
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stdio_sync_filebuf< char >::int_type | syncgetc () |
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stdio_sync_filebuf< wchar_t >::int_type | syncgetc () |
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int_type | syncputc (int_type __c) |
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stdio_sync_filebuf< char >::int_type | syncputc (int_type __c) |
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stdio_sync_filebuf< wchar_t >::int_type | syncputc (int_type __c) |
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int_type | syncungetc (int_type __c) |
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stdio_sync_filebuf< char >::int_type | syncungetc (int_type __c) |
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stdio_sync_filebuf< wchar_t >::int_type | syncungetc (int_type __c) |
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| virtual int_type | uflow () |
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| virtual int_type | underflow () |
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std::streamsize | xsgetn (char *__s, std::streamsize __n) |
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virtual std::streamsize | xsgetn (char_type *__s, std::streamsize __n) |
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| virtual streamsize | xsgetn (char_type *__s, streamsize __n) |
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std::streamsize | xsgetn (wchar_t *__s, std::streamsize __n) |
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std::streamsize | xsputn (const char *__s, std::streamsize __n) |
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virtual std::streamsize | xsputn (const char_type *__s, std::streamsize __n) |
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| virtual streamsize | xsputn (const char_type *__s, streamsize __n) |
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std::streamsize | xsputn (const wchar_t *__s, std::streamsize __n) |
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| char_type * | eback () const |
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| char_type * | gptr () const |
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| char_type * | egptr () const |
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| char_type * | pbase () const |
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| char_type * | pptr () const |
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| char_type * | epptr () const |
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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 56 of file stdio_sync_filebuf.h.
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inlineprotectedvirtualinherited |
Consumes data from the buffer; writes to the controlled sequence.
- Parameters
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| __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().
Definition at line 773 of file streambuf.
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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.
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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.
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The standard adds that the morphemes of
showmanyc are es-how-many-see, not show-manic.
Reimplemented in std::basic_filebuf< _CharT, std::char_traits< _CharT > >.
Definition at line 654 of file streambuf.
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 429 of file streambuf.
template<typename _CharT , typename _Traits = std::char_traits<_CharT>>
template<typename _CharT , typename _Traits = std::char_traits<_CharT>>
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, std::char_traits< _CharT > >.
Definition at line 137 of file stdio_sync_filebuf.h.
template<typename _CharT , typename _Traits = std::char_traits<_CharT>>
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, std::char_traits< _CharT > >.
Definition at line 130 of file stdio_sync_filebuf.h.
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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, std::char_traits< _CharT > >.
Definition at line 670 of file streambuf.tcc.
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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, std::char_traits< _CharT > >.
Definition at line 747 of file streambuf.tcc.
1.9.1