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ldas-tools-al
2.6.4
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Buffer for file streams. More...
#include <fstream.hh>
Inherits basic_streambuf< _CharT, _Traits >, and basic_streambuf< _CharT, _Traits >.
Public Types | |
| typedef _CharT | char_type |
| character type | |
| typedef _Traits::int_type | int_type |
| integer type | |
| typedef _Traits::pos_type | pos_type |
| position type | |
| typedef _Traits::off_type | off_type |
| offset type | |
| typedef _Traits | traits_type |
| traits type | |
| typedef _Traits::state_type | _State_type |
| state type | |
| typedef std::basic_streambuf< _CharT, _Traits > | _Base |
| stream buffer type | |
| typedef basic_filebuf< _CharT, _Traits > | _Self |
| self reference type | |
| typedef _CharT | char_type |
| character type | |
| typedef _Traits::int_type | int_type |
| integer type | |
| typedef _Traits::pos_type | pos_type |
| position type | |
| typedef _Traits::off_type | off_type |
| offset type | |
| typedef _Traits | traits_type |
| traits type | |
| typedef _Traits::state_type | _State_type |
| state type | |
| typedef std::basic_streambuf< _CharT, _Traits > | _Base |
| stream buffer type | |
| typedef basic_filebuf< _CharT, _Traits > | _Self |
| self reference type | |
Public Member Functions | |
| basic_filebuf () | |
| Constructor. More... | |
| ~basic_filebuf () | |
| Destructor. | |
| bool | is_open () const |
| Check if stream is open. | |
| _Self * | open (const char *__s, std::ios_base::openmode __m) |
| Open a stream. | |
| _Self * | open (const char *__s, std::ios_base::openmode __m, long __protection) |
| Open a stream. | |
| _STLP_fd | fd () const |
| Obtain file descriptor. | |
| _Self * | open (int __id, std::ios_base::openmode _Init_mode=m_default_openmode) |
| Attach a stream to a file descriptor. | |
| _Self * | _M_open (int __id, std::ios_base::openmode _Init_mode=_Filebuf_base::m_default_openmode) |
| Attach a stream to a file descriptor. | |
| _Self * | close () |
| Close the stream. More... | |
| void | UseMemoryMappedIO (bool Value) |
| Enable/disable use of memory mapped I/O for stream. | |
| bool | UseMemoryMappedIO () const |
| Obtain the memory mapped I/O status use for the stream. | |
| virtual std::basic_streambuf< _CharT, _Traits > * | setbuf (char_type *, std::streamsize) |
| Set buffer limit. More... | |
| bool | _M_write (char *__buf, std::ptrdiff_t __n) |
| for _Noconv_output | |
| basic_filebuf () | |
| Constructor. | |
| ~basic_filebuf () | |
| Destructor. | |
| bool | is_open () const |
| Check if stream is open. | |
| _Self * | open (const char *__s, std::ios_base::openmode __m) |
| Open a stream. | |
| _Self * | open (const char *__s, std::ios_base::openmode __m, long __protection) |
| Open a stream. | |
| _STLP_fd | fd () const |
| Obtain file descriptor. | |
| _Self * | open (int __id, std::ios_base::openmode _Init_mode=m_default_openmode) |
| Attach a stream to a file descriptor. | |
| _Self * | _M_open (int __id, std::ios_base::openmode _Init_mode=_Filebuf_base::m_default_openmode) |
| Attach a stream to a file descriptor. | |
| _Self * | close () |
| Close the stream. | |
| void | UseMemoryMappedIO (bool Value) |
| Enable/disable use of memory mapped I/O for stream. | |
| bool | UseMemoryMappedIO () const |
| Obtain the memory mapped I/O status use for the stream. | |
| virtual std::basic_streambuf< _CharT, _Traits > * | setbuf (char_type *, std::streamsize) |
| Set buffer limit. | |
| bool | _M_write (char *__buf, std::ptrdiff_t __n) |
| for _Noconv_output | |
Protected Member Functions | |
| virtual std::streamsize | showmanyc () |
| basic_filebuf<> overridden protected virtual member functions More... | |
| virtual int_type | pbackfail (int_type=traits_type::eof()) |
| virtual void | imbue (const std::locale &) |
Friends | |
| class | _Underflow< _CharT, _Traits > |
Buffer for file streams.
| basic_filebuf< _CharT, _Traits >::basic_filebuf | ( | ) |
Constructor.
Public basic_filebuf<> member functions.
| basic_filebuf< _CharT, _Traits > * basic_filebuf< _CharT, _Traits >::close | ( | ) |
Close the stream.
Note order of arguments. We close the file even if __ok is false.
Restore the initial state, except that we don't deallocate the buffer or mess with the cached codecvt information.
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protectedvirtual |
Change the filebuf's locale. This member function has no effect unless it is called before any I/O is performed on the stream.
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protectedvirtual |
Make a putback position available, if necessary, by switching to a special internal buffer used only for putback. The buffer is [_M_pback_buf, _M_pback_buf + _S_pback_buf_size), but the base class only sees a piece of it at a time. (We want to make sure that we don't try to read a character that hasn't been initialized.) The end of the putback buffer is always _M_pback_buf + _S_pback_buf_size, but the beginning is usually not _M_pback_buf.
If we aren't already in input mode, pushback is impossible.
We can use the ordinary get buffer if there's enough space, and if it's a buffer that we're allowed to write to.
Are we in the putback buffer already?
Do we have more room in the putback buffer?
We have made a putback position available. Assign to it, and return.
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virtual |
Set buffer limit.
This member function must be called before any I/O has been performed on the stream, otherwise it has no effect.
__buf == 0 && __n == 0 means to make ths stream unbuffered. __buf != 0 && __n > 0 means to use __buf as the stream's internal buffer, rather than the buffer that would otherwise be allocated automatically. __buf must be a pointer to an array of _CharT whose size is at least __n.
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protectedvirtual |
basic_filebuf<> overridden protected virtual member functions
Is there any possibility that reads can succeed?
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friend |
friend class _Noconv_input<_Traits>; friend class _Noconv_output<_Traits>;
1.8.14