ReactOS 0.4.15-dev-8219-ge8b88cf
basic_filebuf< _CharT, _Traits > Class Template Reference

#include <_fstream.h>

Inheritance diagram for basic_filebuf< _CharT, _Traits >:
Collaboration diagram for basic_filebuf< _CharT, _Traits >:

Public Types

typedef _CharT char_type
 
typedef _Traits::int_type int_type
 
typedef _Traits::pos_type pos_type
 
typedef _Traits::off_type off_type
 
typedef _Traits traits_type
 
typedef _Traits::state_type _State_type
 
typedef basic_streambuf< _CharT, _Traits > _Base
 
typedef basic_filebuf< _CharT, _Traits > _Self
 
- Public Types inherited from basic_streambuf< _CharT, _Traits >
typedef _CharT char_type
 
typedef _Traits::int_type int_type
 
typedef _Traits::pos_type pos_type
 
typedef _Traits::off_type off_type
 
typedef _Traits traits_type
 

Public Member Functions

 basic_filebuf ()
 
 ~basic_filebuf ()
 
bool is_open () const
 
_Selfopen (const char *__s, ios_base::openmode __m)
 
_Selfopen (const char *__s, ios_base::openmode __m, long __protection)
 
_STLP_fd fd () const
 
_Selfopen (int __id, ios_base::openmode _Init_mode=ios_base::__default_mode)
 
_Self_M_open (int __id, ios_base::openmode _Init_mode=ios_base::__default_mode)
 
_Selfclose ()
 
bool _M_write (char *__buf, ptrdiff_t __n)
 
int_type _M_do_noconv_input ()
 
- Public Member Functions inherited from basic_streambuf< _CharT, _Traits >
virtual ~basic_streambuf ()
 
char_type_M_eback () const
 
char_type_M_gptr () const
 
char_type_M_egptr () const
 
void _M_gbump (int __n)
 
void _M_setg (char_type *__gbegin, char_type *__gnext, char_type *__gend)
 
basic_streambuf< _CharT, _Traits > * pubsetbuf (char_type *__s, streamsize __n)
 
pos_type pubseekoff (off_type __offset, ios_base::seekdir __way, ios_base::openmode __mod=ios_base::in|ios_base::out)
 
pos_type pubseekpos (pos_type __sp, ios_base::openmode __mod=ios_base::in|ios_base::out)
 
int pubsync ()
 
int_type sputc (char_type __c)
 
streamsize sputn (const char_type *__s, streamsize __n)
 
streamsize _M_sputnc (char_type __c, streamsize __n)
 
streamsize in_avail ()
 
int_type snextc ()
 
int_type sbumpc ()
 
int_type sgetc ()
 
streamsize sgetn (char_type *__s, streamsize __n)
 
int_type sputbackc (char_type __c)
 
int_type sungetc ()
 
locale pubimbue (const locale &)
 
locale getloc () const
 
void stossc ()
 

Protected Member Functions

virtual streamsize showmanyc ()
 
virtual int_type underflow ()
 
virtual int_type pbackfail (int_type=traits_type::eof())
 
virtual int_type overflow (int_type=traits_type::eof())
 
virtual basic_streambuf< _CharT, _Traits > * setbuf (char_type *, streamsize)
 
virtual pos_type seekoff (off_type, ios_base::seekdir, ios_base::openmode=ios_base::in|ios_base::out)
 
virtual pos_type seekpos (pos_type, ios_base::openmode=ios_base::in|ios_base::out)
 
virtual int sync ()
 
virtual void imbue (const locale &)
 
- Protected Member Functions inherited from basic_streambuf< _CharT, _Traits >
 basic_streambuf ()
 
char_typeeback () const
 
char_typegptr () const
 
char_typeegptr () const
 
void gbump (int __n)
 
void setg (char_type *__gbegin, char_type *__gnext, char_type *__gend)
 
char_typepbase () const
 
char_typepptr () const
 
char_typeepptr () const
 
void pbump (int __n)
 
void setp (char_type *__pbegin, char_type *__pend)
 
virtual basic_streambuf< _CharT, _Traits > * setbuf (char_type *, streamsize)
 
virtual pos_type seekoff (off_type, ios_base::seekdir, ios_base::openmode=ios_base::in|ios_base::out)
 
virtual pos_type seekpos (pos_type, ios_base::openmode=ios_base::in|ios_base::out)
 
virtual int sync ()
 
virtual streamsize showmanyc ()
 
virtual streamsize xsgetn (char_type *__s, streamsize __n)
 
virtual int_type underflow ()
 
virtual int_type uflow ()
 
virtual int_type pbackfail (int_type=traits_type::eof())
 
virtual streamsize xsputn (const char_type *__s, streamsize __n)
 
virtual streamsize _M_xsputnc (char_type __c, streamsize __n)
 
virtual int_type overflow (int_type=traits_type::eof())
 
virtual void imbue (const locale &)
 

Private Types

enum  { _S_pback_buf_size = 8 }
 
typedef codecvt< _CharT, char, _State_type_Codecvt
 

Private Member Functions

void _M_exit_putback_mode ()
 
bool _M_switch_to_input_mode ()
 
void _M_exit_input_mode ()
 
bool _M_switch_to_output_mode ()
 
int_type _M_input_error ()
 
int_type _M_underflow_aux ()
 
int_type _M_output_error ()
 
bool _M_unshift ()
 
bool _M_allocate_buffers (_CharT *__buf, streamsize __n)
 
bool _M_allocate_buffers ()
 
void _M_deallocate_buffers ()
 
pos_type _M_seek_return (off_type __off, _State_type __state)
 
bool _M_seek_init (bool __do_unshift)
 
void _M_setup_codecvt (const locale &, bool __on_imbue=true)
 

Private Attributes

_Filebuf_base _M_base
 
unsigned char _M_constant_width
 
unsigned char _M_always_noconv
 
unsigned char _M_int_buf_dynamic
 
unsigned char _M_in_input_mode
 
unsigned char _M_in_output_mode
 
unsigned char _M_in_error_mode
 
unsigned char _M_in_putback_mode
 
_CharT * _M_int_buf
 
_CharT * _M_int_buf_EOS
 
char_M_ext_buf
 
char_M_ext_buf_EOS
 
char_M_ext_buf_converted
 
char_M_ext_buf_end
 
_State_type _M_state
 
_State_type _M_end_state
 
void_M_mmap_base
 
streamoff _M_mmap_len
 
_CharT * _M_saved_eback
 
_CharT * _M_saved_gptr
 
_CharT * _M_saved_egptr
 
const _Codecvt_M_codecvt
 
int _M_width
 
int _M_max_width
 
_CharT _M_pback_buf [_S_pback_buf_size]
 

Friends

class _Underflow< _CharT, _Traits >
 

Detailed Description

template<class _CharT, class _Traits>
class basic_filebuf< _CharT, _Traits >

Definition at line 152 of file _fstream.h.

Member Typedef Documentation

◆ _Base

template<class _CharT , class _Traits >
typedef basic_streambuf<_CharT, _Traits> basic_filebuf< _CharT, _Traits >::_Base

Definition at line 161 of file _fstream.h.

◆ _Codecvt

template<class _CharT , class _Traits >
typedef codecvt<_CharT, char, _State_type> basic_filebuf< _CharT, _Traits >::_Codecvt
private

Definition at line 319 of file _fstream.h.

◆ _Self

template<class _CharT , class _Traits >
typedef basic_filebuf<_CharT, _Traits> basic_filebuf< _CharT, _Traits >::_Self

Definition at line 162 of file _fstream.h.

◆ _State_type

template<class _CharT , class _Traits >
typedef _Traits::state_type basic_filebuf< _CharT, _Traits >::_State_type

Definition at line 160 of file _fstream.h.

◆ char_type

template<class _CharT , class _Traits >
typedef _CharT basic_filebuf< _CharT, _Traits >::char_type

Definition at line 154 of file _fstream.h.

◆ int_type

template<class _CharT , class _Traits >
typedef _Traits::int_type basic_filebuf< _CharT, _Traits >::int_type

Definition at line 155 of file _fstream.h.

◆ off_type

template<class _CharT , class _Traits >
typedef _Traits::off_type basic_filebuf< _CharT, _Traits >::off_type

Definition at line 157 of file _fstream.h.

◆ pos_type

template<class _CharT , class _Traits >
typedef _Traits::pos_type basic_filebuf< _CharT, _Traits >::pos_type

Definition at line 156 of file _fstream.h.

◆ traits_type

template<class _CharT , class _Traits >
typedef _Traits basic_filebuf< _CharT, _Traits >::traits_type

Definition at line 158 of file _fstream.h.

Member Enumeration Documentation

◆ anonymous enum

template<class _CharT , class _Traits >
anonymous enum
private
Enumerator
_S_pback_buf_size 

Definition at line 326 of file _fstream.h.

326{ _S_pback_buf_size = 8 };
@ _S_pback_buf_size
Definition: _fstream.h:326

Constructor & Destructor Documentation

◆ basic_filebuf()

template<class _CharT , class _Traits >
basic_filebuf< _CharT, _Traits >::basic_filebuf

Definition at line 47 of file _fstream.c.

50 _M_int_buf_dynamic(false),
60 _M_codecvt(0),
62{
63 this->_M_setup_codecvt(locale(), false);
64}
#define _STLP_DEFAULT_CONSTRUCTED(_TTp)
Definition: _construct.h:265
_CharT * _M_saved_gptr
Definition: _fstream.h:316
void * _M_mmap_base
Definition: _fstream.h:311
const _Codecvt * _M_codecvt
Definition: _fstream.h:320
char * _M_ext_buf_end
Definition: _fstream.h:299
unsigned char _M_in_error_mode
Definition: _fstream.h:282
_CharT * _M_int_buf_EOS
Definition: _fstream.h:287
unsigned char _M_int_buf_dynamic
Definition: _fstream.h:278
streamoff _M_mmap_len
Definition: _fstream.h:312
unsigned char _M_always_noconv
Definition: _fstream.h:275
_CharT * _M_saved_eback
Definition: _fstream.h:315
_Filebuf_base _M_base
Definition: _fstream.h:270
unsigned char _M_in_putback_mode
Definition: _fstream.h:283
_CharT * _M_saved_egptr
Definition: _fstream.h:317
char * _M_ext_buf_converted
Definition: _fstream.h:298
_State_type _M_state
Definition: _fstream.h:302
_State_type _M_end_state
Definition: _fstream.h:308
char * _M_ext_buf
Definition: _fstream.h:290
unsigned char _M_in_output_mode
Definition: _fstream.h:281
_Traits::state_type _State_type
Definition: _fstream.h:160
char * _M_ext_buf_EOS
Definition: _fstream.h:291
int _M_max_width
Definition: _fstream.h:323
_CharT * _M_int_buf
Definition: _fstream.h:286
void _M_setup_codecvt(const locale &, bool __on_imbue=true)
Definition: _fstream.c:735
unsigned char _M_constant_width
Definition: _fstream.h:274
unsigned char _M_in_input_mode
Definition: _fstream.h:280
Definition: _locale.h:75

◆ ~basic_filebuf()

template<class _CharT , class _Traits >
basic_filebuf< _CharT, _Traits >::~basic_filebuf

Definition at line 67 of file _fstream.c.

67 {
68 this->close();
70}
void _M_deallocate_buffers()
Definition: _fstream.c:685
_Self * close()
Definition: _fstream.c:81

Member Function Documentation

◆ _M_allocate_buffers() [1/2]

template<class _CharT , class _Traits >
bool basic_filebuf< _CharT, _Traits >::_M_allocate_buffers
private

Definition at line 676 of file _fstream.c.

676 {
677 // Choose a buffer that's at least 4096 characters long and that's a
678 // multiple of the page size.
679 streamsize __default_bufsiz =
681 return _M_allocate_buffers(0, __default_bufsiz);
682}
ptrdiff_t streamsize
Definition: char_traits.h:81
static size_t _STLP_CALL __page_size()
Definition: _fstream.h:131
bool _M_allocate_buffers()
Definition: _fstream.c:676

◆ _M_allocate_buffers() [2/2]

template<class _CharT , class _Traits >
bool basic_filebuf< _CharT, _Traits >::_M_allocate_buffers ( _CharT *  __buf,
streamsize  __n 
)
private

Definition at line 630 of file _fstream.c.

630 {
631 //The major hypothesis in the following implementation is that size_t is unsigned.
632 //We also need streamsize byte representation to be larger or equal to the int
633 //representation to correctly store the encoding information.
635 sizeof(streamsize) >= sizeof(int))
636
637 if (__buf == 0) {
638 streamsize __bufsize = __n * sizeof(_CharT);
639 //We first check that the streamsize representation can't overflow a size_t one.
640 //If it can, we check that __bufsize is not higher than the size_t max value.
641 if ((sizeof(streamsize) > sizeof(size_t)) &&
643 return false;
644 _M_int_buf = __STATIC_CAST(_CharT*, malloc(__STATIC_CAST(size_t, __bufsize)));
645 if (!_M_int_buf)
646 return false;
647 _M_int_buf_dynamic = true;
648 }
649 else {
650 _M_int_buf = __buf;
651 _M_int_buf_dynamic = false;
652 }
653
656
657 _M_ext_buf = 0;
658 if ((sizeof(streamsize) < sizeof(size_t)) ||
659 ((sizeof(streamsize) == sizeof(size_t)) && numeric_limits<streamsize>::is_signed) ||
661 _M_ext_buf = __STATIC_CAST(char*, malloc(__STATIC_CAST(size_t, __ebufsiz)));
662 }
663
664 if (!_M_ext_buf) {
666 return false;
667 }
668
671 return true;
672}
return __n
Definition: _algo.h:75
int max_length() const _STLP_NOTHROW
Definition: _codecvt.h:110
#define malloc
Definition: debug_ros.c:4
__kernel_ptrdiff_t ptrdiff_t
Definition: linux.h:247
#define _STLP_STATIC_ASSERT(expr)
Definition: features.h:313
#define __STATIC_CAST(__x, __y)
Definition: features.h:585
#define max(a, b)
Definition: svc.c:63

◆ _M_deallocate_buffers()

template<class _CharT , class _Traits >
void basic_filebuf< _CharT, _Traits >::_M_deallocate_buffers
private

Definition at line 685 of file _fstream.c.

685 {
689 _M_int_buf = 0;
690 _M_int_buf_EOS = 0;
691 _M_ext_buf = 0;
692 _M_ext_buf_EOS = 0;
693}
#define free
Definition: debug_ros.c:5

◆ _M_do_noconv_input()

template<class _CharT , class _Traits >
int_type basic_filebuf< _CharT, _Traits >::_M_do_noconv_input ( )
inline

Definition at line 335 of file _fstream.h.

335 {
338 return traits_type::to_int_type(*_M_ext_buf);
339 }
_CharT char_type
Definition: _fstream.h:154
void setg(char_type *__gbegin, char_type *__gnext, char_type *__gend)
Definition: _streambuf.h:92

◆ _M_exit_input_mode()

template<class _CharT , class _Traits >
void basic_filebuf< _CharT, _Traits >::_M_exit_input_mode
private

Definition at line 118 of file _fstream.c.

118 {
119 if (_M_mmap_base != 0) {
121 _M_mmap_base = 0;
122 _M_mmap_len = 0;
123 }
124 _M_in_input_mode = false;
125}
void _M_unmap(void *__mmap_base, streamoff __len)

Referenced by basic_filebuf< _CharT, _Traits >::_M_seek_return().

◆ _M_exit_putback_mode()

template<class _CharT , class _Traits >
void basic_filebuf< _CharT, _Traits >::_M_exit_putback_mode ( )
inlineprivate

Definition at line 228 of file _fstream.h.

228 {
230 _M_in_putback_mode = false;
231 }

Referenced by _Underflow< _CharT, _Traits >::_M_doit().

◆ _M_input_error()

template<class _CharT , class _Traits >
__BF_int_type__ basic_filebuf< _CharT, _Traits >::_M_input_error
private

Definition at line 485 of file _fstream.c.

485 {
486 this->_M_exit_input_mode();
487 _M_in_output_mode = false;
488 _M_in_error_mode = true;
489 this->setg(0, 0, 0);
490 return traits_type::eof();
491}
void _M_exit_input_mode()
Definition: _fstream.c:118

◆ _M_open()

template<class _CharT , class _Traits >
_Self * basic_filebuf< _CharT, _Traits >::_M_open ( int  __id,
ios_base::openmode  _Init_mode = ios_base::__default_mode 
)
inline

Definition at line 202 of file _fstream.h.

202 {
203 return _M_base._M_open(__id, _Init_mode) ? this : 0;
204 }
bool _M_open(const char *, ios_base::openmode, long __protection)

Referenced by basic_filebuf< _CharT, _Traits >::open().

◆ _M_output_error()

template<class _CharT , class _Traits >
__BF_int_type__ basic_filebuf< _CharT, _Traits >::_M_output_error
private

Definition at line 579 of file _fstream.c.

579 {
580 _M_in_output_mode = false;
581 _M_in_input_mode = false;
582 _M_in_error_mode = true;
583 this->setp(0, 0);
584 return traits_type::eof();
585}
void setp(char_type *__pbegin, char_type *__pend)
Definition: _streambuf.h:116

◆ _M_seek_init()

template<class _CharT , class _Traits >
bool basic_filebuf< _CharT, _Traits >::_M_seek_init ( bool  __do_unshift)
private

Definition at line 700 of file _fstream.c.

700 {
701 // If we're in error mode, leave it.
702 _M_in_error_mode = false;
703
704 // Flush the output buffer if we're in output mode, and (conditionally)
705 // emit an unshift sequence.
706 if (_M_in_output_mode) {
707 bool __ok = !traits_type::eq_int_type(this->overflow(traits_type::eof()),
708 traits_type::eof());
709 if (__do_unshift)
710 __ok = __ok && this->_M_unshift();
711 if (!__ok) {
712 _M_in_output_mode = false;
713 _M_in_error_mode = true;
714 this->setp(0, 0);
715 return false;
716 }
717 }
718
719 // Discard putback characters, if any.
722
723 return true;
724}
bool _M_unshift()
Definition: _fstream.c:593
void _M_exit_putback_mode()
Definition: _fstream.h:228
virtual int_type overflow(int_type=traits_type::eof())
Definition: _fstream.c:208

◆ _M_seek_return()

template<class _CharT , class _Traits >
pos_type basic_filebuf< _CharT, _Traits >::_M_seek_return ( off_type  __off,
_State_type  __state 
)
inlineprivate

Definition at line 247 of file _fstream.h.

247 {
248 if (__off != -1) {
251 _M_in_input_mode = false;
252 _M_in_output_mode = false;
253 _M_in_putback_mode = false;
254 _M_in_error_mode = false;
255 this->setg(0, 0, 0);
256 this->setp(0, 0);
257 }
258
259 pos_type __result(__off);
260 __result.state(__state);
261 return __result;
262 }
_Traits::pos_type pos_type
Definition: _fstream.h:156

◆ _M_setup_codecvt()

template<class _CharT , class _Traits >
void basic_filebuf< _CharT, _Traits >::_M_setup_codecvt ( const locale __loc,
bool  __on_imbue = true 
)
private

Definition at line 735 of file _fstream.c.

735 {
736 if (has_facet<_Codecvt>(__loc)) {
737 _M_codecvt = &use_facet<_Codecvt>(__loc) ;
738 int __encoding = _M_codecvt->encoding();
739
740 _M_width = (max)(__encoding, 1);
742 _M_constant_width = __encoding > 0;
744 }
745 else {
746 _M_codecvt = 0;
749 if (__on_imbue) {
750 //This call will generate an exception reporting the problem.
751 use_facet<_Codecvt>(__loc);
752 }
753 }
754}
int encoding() const _STLP_NOTHROW
Definition: _codecvt.h:98
bool always_noconv() const _STLP_NOTHROW
Definition: _codecvt.h:100

Referenced by basic_filebuf< _CharT, _Traits >::basic_filebuf().

◆ _M_switch_to_input_mode()

template<class _CharT , class _Traits >
bool basic_filebuf< _CharT, _Traits >::_M_switch_to_input_mode
private

Definition at line 429 of file _fstream.c.

429 {
430 if (this->is_open() && (((int)_M_base.__o_mode() & (int)ios_base::in) !=0)
431 && (_M_in_output_mode == 0) && (_M_in_error_mode == 0)) {
433 return false;
434
437
439
440 _M_in_input_mode = true;
441 return true;
442 }
443
444 return false;
445}
int __o_mode() const
Definition: _fstream.h:132
bool is_open() const
Definition: _fstream.h:169

Referenced by _Underflow< _CharT, _Traits >::_M_doit().

◆ _M_switch_to_output_mode()

template<class _CharT , class _Traits >
bool basic_filebuf< _CharT, _Traits >::_M_switch_to_output_mode
private

Definition at line 452 of file _fstream.c.

452 {
453 if (this->is_open() && (_M_base.__o_mode() & (int)ios_base::out) &&
454 _M_in_input_mode == 0 && _M_in_error_mode == 0) {
455
457 return false;
458
459 // In append mode, every write does an implicit seek to the end
460 // of the file. Whenever leaving output mode, the end of file
461 // get put in the initial shift state.
462 if (_M_base.__o_mode() & ios_base::app)
464
465 this->setp(_M_int_buf, _M_int_buf_EOS - 1);
466 _M_in_output_mode = true;
467 return true;
468 }
469
470 return false;
471}

◆ _M_underflow_aux()

template<class _CharT , class _Traits >
__BF_int_type__ basic_filebuf< _CharT, _Traits >::_M_underflow_aux
private

Definition at line 495 of file _fstream.c.

495 {
496 // We have the state and file position from the end of the internal
497 // buffer. This round, they become the beginning of the internal buffer.
499
500 // Fill the external buffer. Start with any leftover characters that
501 // didn't get converted last time.
503
505 // boris : copy_backward did not work
506 //_M_ext_buf_end = copy_backward(_M_ext_buf_converted, _M_ext_buf_end,
507 //_M_ext_buf+ (_M_ext_buf_end - _M_ext_buf_converted));
508 else
510
511 // Now fill the external buffer with characters from the file. This is
512 // a loop because occasionally we don't get enough external characters
513 // to make progress.
514 for (;;) {
516 if (__n < 0) {
517 // Read failed, maybe we should set err bit on associated stream...
518 this->setg(0, 0, 0);
519 return traits_type::eof();
520 }
521
523
524 // If external buffer is empty there is nothing to do.
525 if (_M_ext_buf == _M_ext_buf_end) {
526 this->setg(0, 0, 0);
527 return traits_type::eof();
528 }
529
530 // Convert the external buffer to internal characters.
531 const char* __enext;
532 _CharT* __inext;
533
534 typename _Codecvt::result __status
536 _M_ext_buf, _M_ext_buf_end, __enext,
537 _M_int_buf, _M_int_buf_EOS, __inext);
538
539 /* Error conditions:
540 * (1) Return value of error.
541 * (2) Producing internal characters without consuming external characters.
542 * (3) In fixed-width encodings, producing an internal sequence whose length
543 * is inconsistent with that of the internal sequence.
544 * (4) Failure to produce any characters if we have enough characters in
545 * the external buffer, where "enough" means the largest possible width
546 * of a single character. */
547 if (__status == _Codecvt::noconv)
549 else if (__status == _Codecvt::error ||
550 (__inext != _M_int_buf && __enext == _M_ext_buf) ||
551 (_M_constant_width && (__inext - _M_int_buf) * _M_width != (__enext - _M_ext_buf)) ||
552 (__inext == _M_int_buf && __enext - _M_ext_buf >= _M_max_width))
553 return _M_input_error();
554 else if (__inext != _M_int_buf) {
556 this->setg(_M_int_buf, _M_int_buf, __inext);
557 return traits_type::to_int_type(*_M_int_buf);
558 }
559 /* We need to go around the loop again to get more external characters.
560 * But if the previous read failed then don't try again for now.
561 * Don't enter error mode for a failed read. Error mode is sticky,
562 * and we might succeed if we try again. */
563 if (__n <= 0) {
564 this->setg(0, 0, 0);
565 return traits_type::eof();
566 }
567 }
568}
ptrdiff_t _M_read(char *__buf, ptrdiff_t __n)
static int_type _STLP_CALL _M_doit(basic_filebuf< char_type, _Traits > *)
Definition: _fstream.h:391
int_type _M_input_error()
Definition: _fstream.c:485
result in(state_type &__state, const extern_type *__from, const extern_type *__from_end, const extern_type *&__from_next, intern_type *__to, intern_type *__to_limit, intern_type *&__to_next) const
Definition: _codecvt.h:84

Referenced by _Underflow< _CharT, _Traits >::_M_doit().

◆ _M_unshift()

template<class _CharT , class _Traits >
bool basic_filebuf< _CharT, _Traits >::_M_unshift
private

Definition at line 593 of file _fstream.c.

593 {
595 typename _Codecvt::result __status;
596 do {
597 char* __enext = _M_ext_buf;
598 __status = _M_codecvt->unshift(_M_state,
599 _M_ext_buf, _M_ext_buf_EOS, __enext);
600 if (__status == _Codecvt::noconv ||
601 (__enext == _M_ext_buf && __status == _Codecvt::ok))
602 return true;
603 else if (__status == _Codecvt::error)
604 return false;
605 else if (!_M_write(_M_ext_buf, __enext - _M_ext_buf))
606 return false;
607 } while (__status == _Codecvt::partial);
608 }
609
610 return true;
611}
bool _M_write(char *__buf, ptrdiff_t __n)
Definition: _fstream.h:331
result unshift(state_type &__state, extern_type *__to, extern_type *__to_limit, extern_type *&__to_next) const
Definition: _codecvt.h:76

◆ _M_write()

template<class _CharT , class _Traits >
bool basic_filebuf< _CharT, _Traits >::_M_write ( char __buf,
ptrdiff_t  __n 
)
inline

Definition at line 331 of file _fstream.h.

331{return _M_base._M_write(__buf, __n); }
bool _M_write(char *__buf, ptrdiff_t __n)

◆ close()

template<class _CharT , class _Traits >
basic_filebuf< _CharT, _Traits > * basic_filebuf< _CharT, _Traits >::close

Definition at line 81 of file _fstream.c.

81 {
82 bool __ok = this->is_open();
83
85 __ok = __ok && !_Traits::eq_int_type(this->overflow(traits_type::eof()),
86 traits_type::eof());
87 __ok = __ok && this->_M_unshift();
88 }
89 else if (_M_in_input_mode)
90 this->_M_exit_input_mode();
91
92 // Note order of arguments. We close the file even if __ok is false.
93 __ok = _M_base._M_close() && __ok;
94
95 // Restore the initial state, except that we don't deallocate the buffer
96 // or mess with the cached codecvt information.
99
100 _M_mmap_base = 0;
101 _M_mmap_len = 0;
102
103 this->setg(0, 0, 0);
104 this->setp(0, 0);
105
107
109 = false;
110
111 return __ok ? this : 0;
112}

◆ fd()

template<class _CharT , class _Traits >
_STLP_fd basic_filebuf< _CharT, _Traits >::fd ( ) const
inline

Definition at line 182 of file _fstream.h.

182{ return _M_base.__get_fd(); }
_STLP_fd __get_fd() const
Definition: _fstream.h:136

◆ imbue()

template<class _CharT , class _Traits >
void basic_filebuf< _CharT, _Traits >::imbue ( const locale __loc)
protectedvirtual

Reimplemented from basic_streambuf< _CharT, _Traits >.

Definition at line 413 of file _fstream.c.

413 {
415 this->_M_setup_codecvt(__loc);
416 }
417}

◆ is_open()

template<class _CharT , class _Traits >
bool basic_filebuf< _CharT, _Traits >::is_open ( ) const
inline

Definition at line 169 of file _fstream.h.

169{ return _M_base.__is_open(); }
bool __is_open() const
Definition: _fstream.h:133

◆ open() [1/3]

template<class _CharT , class _Traits >
_Self * basic_filebuf< _CharT, _Traits >::open ( const char __s,
ios_base::openmode  __m 
)
inline

Definition at line 171 of file _fstream.h.

171 {
172 return _M_base._M_open(__s, __m) ? this : 0;
173 }

◆ open() [2/3]

template<class _CharT , class _Traits >
_Self * basic_filebuf< _CharT, _Traits >::open ( const char __s,
ios_base::openmode  __m,
long  __protection 
)
inline

Definition at line 177 of file _fstream.h.

178 {
179 return _M_base._M_open(__s, __m, __protection) ? this : 0;
180 }

◆ open() [3/3]

template<class _CharT , class _Traits >
_Self * basic_filebuf< _CharT, _Traits >::open ( int  __id,
ios_base::openmode  _Init_mode = ios_base::__default_mode 
)
inline

Definition at line 184 of file _fstream.h.

184 {
185 return this->_M_open(__id, _Init_mode);
186 }
_Self * _M_open(int __id, ios_base::openmode _Init_mode=ios_base::__default_mode)
Definition: _fstream.h:202

◆ overflow()

template<class _CharT , class _Traits >
__BF_int_type__ basic_filebuf< _CharT, _Traits >::overflow ( int_type  __c = traits_type::eof())
protectedvirtual

Reimplemented from basic_streambuf< _CharT, _Traits >.

Definition at line 208 of file _fstream.c.

208 {
209 // Switch to output mode, if necessary.
212 return traits_type::eof();
213
214 _CharT* __ibegin = this->_M_int_buf;
215 _CharT* __iend = this->pptr();
216 this->setp(_M_int_buf, _M_int_buf_EOS - 1);
217
218 // Put __c at the end of the internal buffer.
219 if (!traits_type::eq_int_type(__c, traits_type::eof()))
220 *__iend++ = _Traits::to_char_type(__c);
221
222 // For variable-width encodings, output may take more than one pass.
223 while (__ibegin != __iend) {
224 const _CharT* __inext = __ibegin;
225 char* __enext = _M_ext_buf;
226 typename _Codecvt::result __status
227 = _M_codecvt->out(_M_state, __ibegin, __iend, __inext,
228 _M_ext_buf, _M_ext_buf_EOS, __enext);
229 if (__status == _Codecvt::noconv) {
230 return _Noconv_output<_Traits>::_M_doit(this, __ibegin, __iend)
231 ? traits_type::not_eof(__c)
232 : _M_output_error();
233 }
234
235 // For a constant-width encoding we know that the external buffer
236 // is large enough, so failure to consume the entire internal buffer
237 // or to produce the correct number of external characters, is an error.
238 // For a variable-width encoding, however, we require only that we
239 // consume at least one internal character
240 else if (__status != _Codecvt::error &&
241 (((__inext == __iend) &&
242 (__enext - _M_ext_buf == _M_width * (__iend - __ibegin))) ||
243 (!_M_constant_width && __inext != __ibegin))) {
244 // We successfully converted part or all of the internal buffer.
245 ptrdiff_t __n = __enext - _M_ext_buf;
246 if (_M_write(_M_ext_buf, __n))
247 __ibegin += __inext - __ibegin;
248 else
249 return _M_output_error();
250 }
251 else
252 return _M_output_error();
253 }
254
255 return traits_type::not_eof(__c);
256}
static bool _STLP_CALL _M_doit(basic_filebuf< char_type, _Traits > *, char_type *, char_type *)
Definition: _fstream.h:357
bool _M_switch_to_output_mode()
Definition: _fstream.c:452
int_type _M_output_error()
Definition: _fstream.c:579
char_type * pptr() const
Definition: _streambuf.h:112
result out(state_type &__state, const intern_type *__from, const intern_type *__from_end, const intern_type *&__from_next, extern_type *__to, extern_type *__to_limit, extern_type *&__to_next) const
Definition: _codecvt.h:62
#define __c
Definition: schilyio.h:209

◆ pbackfail()

template<class _CharT , class _Traits >
__BF_int_type__ basic_filebuf< _CharT, _Traits >::pbackfail ( int_type  __c = traits_type::eof())
protectedvirtual

Reimplemented from basic_streambuf< _CharT, _Traits >.

Definition at line 157 of file _fstream.c.

157 {
158 const int_type __eof = traits_type::eof();
159
160 // If we aren't already in input mode, pushback is impossible.
161 if (!_M_in_input_mode)
162 return __eof;
163
164 // We can use the ordinary get buffer if there's enough space, and
165 // if it's a buffer that we're allowed to write to.
166 if (this->gptr() != this->eback() &&
167 (traits_type::eq_int_type(__c, __eof) ||
168 traits_type::eq(traits_type::to_char_type(__c), this->gptr()[-1]) ||
169 !_M_mmap_base)) {
170 this->gbump(-1);
171 if (traits_type::eq_int_type(__c, __eof) ||
172 traits_type::eq(traits_type::to_char_type(__c), *this->gptr()))
173 return traits_type::to_int_type(*this->gptr());
174 }
175 else if (!traits_type::eq_int_type(__c, __eof)) {
176 // Are we in the putback buffer already?
177 _CharT* __pback_end = _M_pback_buf + __STATIC_CAST(int,_S_pback_buf_size);
178 if (_M_in_putback_mode) {
179 // Do we have more room in the putback buffer?
180 if (this->eback() != _M_pback_buf)
181 this->setg(this->egptr() - 1, this->egptr() - 1, __pback_end);
182 else
183 return __eof; // No more room in the buffer, so fail.
184 }
185 else { // We're not yet in the putback buffer.
186 _M_saved_eback = this->eback();
187 _M_saved_gptr = this->gptr();
188 _M_saved_egptr = this->egptr();
189 this->setg(__pback_end - 1, __pback_end - 1, __pback_end);
190 _M_in_putback_mode = true;
191 }
192 }
193 else
194 return __eof;
195
196 // We have made a putback position available. Assign to it, and return.
197 *this->gptr() = traits_type::to_char_type(__c);
198 return __c;
199}
_CharT _M_pback_buf[_S_pback_buf_size]
Definition: _fstream.h:327
_Traits::int_type int_type
Definition: _fstream.h:155
char_type * egptr() const
Definition: _streambuf.h:89
char_type * gptr() const
Definition: _streambuf.h:88
char_type * eback() const
Definition: _streambuf.h:87
void gbump(int __n)
Definition: _streambuf.h:91

◆ seekoff()

template<class _CharT , class _Traits >
__BF_pos_type__ basic_filebuf< _CharT, _Traits >::seekoff ( off_type  __off,
ios_base::seekdir  __whence,
ios_base::openmode  = ios_base::in | ios_base::out 
)
protectedvirtual

Reimplemented from basic_streambuf< _CharT, _Traits >.

Definition at line 291 of file _fstream.c.

293 {
294 if (!this->is_open())
295 return pos_type(-1);
296
297 if (!_M_constant_width && __off != 0)
298 return pos_type(-1);
299
300 if (!_M_seek_init(__off != 0 || __whence != ios_base::cur))
301 return pos_type(-1);
302
303 // Seek to beginning or end, regardless of whether we're in input mode.
304 if (__whence == ios_base::beg || __whence == ios_base::end)
305 return _M_seek_return(_M_base._M_seek(_M_width * __off, __whence),
306 _State_type());
307
308 // Seek relative to current position. Complicated if we're in input mode.
309 _STLP_ASSERT(__whence == ios_base::cur)
310 if (!_M_in_input_mode)
311 return _M_seek_return(_M_base._M_seek(_M_width * __off, __whence),
312 _State_type());
313
314 if (_M_mmap_base != 0) {
315 // __off is relative to gptr(). We need to do a bit of arithmetic
316 // to get an offset relative to the external file pointer.
317 streamoff __adjust = _M_mmap_len - (this->gptr() - (_CharT*) _M_mmap_base);
318
319 // if __off == 0, we do not need to exit input mode and to shift file pointer
320 return __off == 0 ? pos_type(_M_base._M_seek(0, ios_base::cur) - __adjust)
321 : _M_seek_return(_M_base._M_seek(__off - __adjust, ios_base::cur), _State_type());
322 }
323
324 if (_M_constant_width) { // Get or set the position.
325 streamoff __iadj = _M_width * (this->gptr() - this->eback());
326
327 // Compensate for offset relative to gptr versus offset relative
328 // to external pointer. For a text-oriented stream, where the
329 // compensation is more than just pointer arithmetic, we may get
330 // but not set the current position.
331
332 if (__iadj <= _M_ext_buf_end - _M_ext_buf) {
334
335 return __off == 0 ? pos_type(_M_base._M_seek(0, ios_base::cur) - __eadj)
336 : _M_seek_return(_M_base._M_seek(__off - __eadj, ios_base::cur), _State_type());
337 }
338 }
339 else { // Get the position. Encoding is var width.
340 // Get position in internal buffer.
341 ptrdiff_t __ipos = this->gptr() - this->eback();
342
343 // Get corresponding position in external buffer.
344 _State_type __state = _M_state;
345 int __epos = _M_codecvt->length(__state, _M_ext_buf, _M_ext_buf_converted,
346 __ipos);
347#if defined (_STLP_ASSERTIONS)
348 // Sanity check (expensive): make sure __epos is the right answer.
349 _STLP_ASSERT(__epos >= 0)
350 _State_type __tmp_state = _M_state;
351 _Filebuf_Tmp_Buf<_CharT> __buf(__ipos);
352 _CharT* __ibegin = __buf._M_ptr;
353 _CharT* __inext = __ibegin;
354 const char* __dummy;
355 typename _Codecvt::result __status
356 = _M_codecvt->in(__tmp_state,
357 _M_ext_buf, _M_ext_buf + __epos, __dummy,
358 __ibegin, __ibegin + __ipos, __inext);
359 // The result code is necessarily ok because:
360 // - noconv: impossible for a variable encoding
361 // - error: length method is supposed to count until it reach max value or find an error so we cannot have
362 // an error again when decoding an external buffer up to length return value.
363 // - partial: idem error, it is also a reason for length to stop counting.
364 _STLP_ASSERT(__status == _Codecvt::ok)
365 _STLP_ASSERT(__inext == __ibegin + __ipos)
366 _STLP_ASSERT(equal(this->eback(), this->gptr(), __ibegin, _STLP_PRIV _Eq_traits<traits_type>()))
367#endif
368 // Get the current position (at the end of the external buffer),
369 // then adjust it. Again, it might be a text-oriented stream.
370 streamoff __cur = _M_base._M_seek(0, ios_base::cur);
373 if (__cur != -1 && __cur + __adj >= 0)
374 return __off == 0 ? pos_type(__cur + __adj)
375 : _M_seek_return(__cur + __adj, __state);
376 }
377
378 return pos_type(-1);
379}
#define _STLP_ASSERT(expr)
Definition: _debug.h:165
#define _STLP_PRIV
Definition: _dm.h:70
#define ok(value,...)
Definition: atltest.h:57
off_t streamoff
Definition: char_traits.h:74
streamoff _M_seek(streamoff __offset, ios_base::seekdir __dir)
streamoff _M_get_offset(char *__first, char *__last)
Definition: _fstream.h:88
pos_type _M_seek_return(off_type __off, _State_type __state)
Definition: _fstream.h:247
bool _M_seek_init(bool __do_unshift)
Definition: _fstream.c:700
codecvt< _CharT, char, _State_type > _Codecvt
Definition: _fstream.h:319
_Traits traits_type
Definition: _fstream.h:158
int length(state_type &__state, const extern_type *__from, const extern_type *__from_end, size_t __max) const
Definition: _codecvt.h:102
char typename[32]
Definition: main.c:84
FxCollectionEntry * cur
GLuint in
Definition: glext.h:9616
GLuint64EXT * result
Definition: glext.h:11304
#define equal(x, y)
Definition: reader.cc:56
#define const
Definition: zconf.h:233

◆ seekpos()

template<class _CharT , class _Traits >
__BF_pos_type__ basic_filebuf< _CharT, _Traits >::seekpos ( pos_type  __pos,
ios_base::openmode  = ios_base::in | ios_base::out 
)
protectedvirtual

Reimplemented from basic_streambuf< _CharT, _Traits >.

Definition at line 384 of file _fstream.c.

385 {
386 if (this->is_open()) {
387 if (!_M_seek_init(true))
388 return pos_type(-1);
389
390 streamoff __off = off_type(__pos);
391 if (__off != -1 && _M_base._M_seek(__off, ios_base::beg) != -1) {
392 _M_state = __pos.state();
393 return _M_seek_return(__off, __pos.state());
394 }
395 }
396
397 return pos_type(-1);
398}
_Traits::off_type off_type
Definition: _fstream.h:157

◆ setbuf()

template<class _CharT , class _Traits >
basic_streambuf< _CharT, _Traits > * basic_filebuf< _CharT, _Traits >::setbuf ( char_type __buf,
streamsize  __n 
)
protectedvirtual

Reimplemented from basic_streambuf< _CharT, _Traits >.

Definition at line 268 of file _fstream.c.

268 {
270 _M_int_buf == 0) {
271 if (__buf == 0 && __n == 0)
273 else if (__buf != 0 && __n > 0)
274 _M_allocate_buffers(__buf, __n);
275 }
276 return this;
277}

◆ showmanyc()

template<class _CharT , class _Traits >
streamsize basic_filebuf< _CharT, _Traits >::showmanyc
protectedvirtual

Reimplemented from basic_streambuf< _CharT, _Traits >.

Definition at line 132 of file _fstream.c.

132 {
133 // Is there any possibility that reads can succeed?
134 if (!this->is_open() || _M_in_output_mode || _M_in_error_mode)
135 return -1;
136 else if (_M_in_putback_mode)
137 return this->egptr() - this->gptr();
138 else if (_M_constant_width) {
139 streamoff __pos = _M_base._M_seek(0, ios_base::cur);
140 streamoff __size = _M_base._M_file_size();
141 return __pos >= 0 && __size > __pos ? __size - __pos : 0;
142 }
143 else
144 return 0;
145}
streamoff _M_file_size()

◆ sync()

template<class _CharT , class _Traits >
int basic_filebuf< _CharT, _Traits >::sync
protectedvirtual

Reimplemented from basic_streambuf< _CharT, _Traits >.

Definition at line 402 of file _fstream.c.

402 {
404 return traits_type::eq_int_type(this->overflow(traits_type::eof()),
405 traits_type::eof()) ? -1 : 0;
406 return 0;
407}

◆ underflow()

template<class _CharT , class _Traits >
_STLP_TYPENAME_ON_RETURN_TYPE basic_filebuf< _CharT, _Traits >::int_type basic_filebuf< _CharT, _Traits >::underflow
protectedvirtual

Reimplemented from basic_streambuf< _CharT, _Traits >.

Definition at line 75 of file _fstream.c.

75 {
77}
static int_type _STLP_CALL _M_doit(basic_filebuf< _CharT, _Traits > *__this)
Definition: _fstream.h:416

Friends And Related Function Documentation

◆ _Underflow< _CharT, _Traits >

template<class _CharT , class _Traits >
friend class _Underflow< _CharT, _Traits >
friend

Definition at line 237 of file _fstream.h.

Member Data Documentation

◆ _M_always_noconv

template<class _CharT , class _Traits >
unsigned char basic_filebuf< _CharT, _Traits >::_M_always_noconv
private

Definition at line 275 of file _fstream.h.

◆ _M_base

◆ _M_codecvt

template<class _CharT , class _Traits >
const _Codecvt* basic_filebuf< _CharT, _Traits >::_M_codecvt
private

Definition at line 320 of file _fstream.h.

◆ _M_constant_width

template<class _CharT , class _Traits >
unsigned char basic_filebuf< _CharT, _Traits >::_M_constant_width
private

Definition at line 274 of file _fstream.h.

◆ _M_end_state

template<class _CharT , class _Traits >
_State_type basic_filebuf< _CharT, _Traits >::_M_end_state
private

Definition at line 308 of file _fstream.h.

◆ _M_ext_buf

template<class _CharT , class _Traits >
char* basic_filebuf< _CharT, _Traits >::_M_ext_buf
private

Definition at line 290 of file _fstream.h.

Referenced by basic_filebuf< _CharT, _Traits >::_M_do_noconv_input().

◆ _M_ext_buf_converted

template<class _CharT , class _Traits >
char* basic_filebuf< _CharT, _Traits >::_M_ext_buf_converted
private

Definition at line 298 of file _fstream.h.

Referenced by basic_filebuf< _CharT, _Traits >::_M_do_noconv_input().

◆ _M_ext_buf_end

template<class _CharT , class _Traits >
char* basic_filebuf< _CharT, _Traits >::_M_ext_buf_end
private

Definition at line 299 of file _fstream.h.

Referenced by basic_filebuf< _CharT, _Traits >::_M_do_noconv_input().

◆ _M_ext_buf_EOS

template<class _CharT , class _Traits >
char* basic_filebuf< _CharT, _Traits >::_M_ext_buf_EOS
private

Definition at line 291 of file _fstream.h.

◆ _M_in_error_mode

template<class _CharT , class _Traits >
unsigned char basic_filebuf< _CharT, _Traits >::_M_in_error_mode
private

Definition at line 282 of file _fstream.h.

Referenced by basic_filebuf< _CharT, _Traits >::_M_seek_return().

◆ _M_in_input_mode

template<class _CharT , class _Traits >
unsigned char basic_filebuf< _CharT, _Traits >::_M_in_input_mode
private

◆ _M_in_output_mode

template<class _CharT , class _Traits >
unsigned char basic_filebuf< _CharT, _Traits >::_M_in_output_mode
private

Definition at line 281 of file _fstream.h.

Referenced by basic_filebuf< _CharT, _Traits >::_M_seek_return().

◆ _M_in_putback_mode

template<class _CharT , class _Traits >
unsigned char basic_filebuf< _CharT, _Traits >::_M_in_putback_mode
private

◆ _M_int_buf

template<class _CharT , class _Traits >
_CharT* basic_filebuf< _CharT, _Traits >::_M_int_buf
private

Definition at line 286 of file _fstream.h.

◆ _M_int_buf_dynamic

template<class _CharT , class _Traits >
unsigned char basic_filebuf< _CharT, _Traits >::_M_int_buf_dynamic
private

Definition at line 278 of file _fstream.h.

◆ _M_int_buf_EOS

template<class _CharT , class _Traits >
_CharT* basic_filebuf< _CharT, _Traits >::_M_int_buf_EOS
private

Definition at line 287 of file _fstream.h.

◆ _M_max_width

template<class _CharT , class _Traits >
int basic_filebuf< _CharT, _Traits >::_M_max_width
private

Definition at line 323 of file _fstream.h.

◆ _M_mmap_base

template<class _CharT , class _Traits >
void* basic_filebuf< _CharT, _Traits >::_M_mmap_base
private

Definition at line 311 of file _fstream.h.

◆ _M_mmap_len

template<class _CharT , class _Traits >
streamoff basic_filebuf< _CharT, _Traits >::_M_mmap_len
private

Definition at line 312 of file _fstream.h.

◆ _M_pback_buf

template<class _CharT , class _Traits >
_CharT basic_filebuf< _CharT, _Traits >::_M_pback_buf[_S_pback_buf_size]
private

Definition at line 327 of file _fstream.h.

◆ _M_saved_eback

template<class _CharT , class _Traits >
_CharT* basic_filebuf< _CharT, _Traits >::_M_saved_eback
private

Definition at line 315 of file _fstream.h.

Referenced by basic_filebuf< _CharT, _Traits >::_M_exit_putback_mode().

◆ _M_saved_egptr

template<class _CharT , class _Traits >
_CharT* basic_filebuf< _CharT, _Traits >::_M_saved_egptr
private

Definition at line 317 of file _fstream.h.

Referenced by basic_filebuf< _CharT, _Traits >::_M_exit_putback_mode().

◆ _M_saved_gptr

template<class _CharT , class _Traits >
_CharT* basic_filebuf< _CharT, _Traits >::_M_saved_gptr
private

Definition at line 316 of file _fstream.h.

Referenced by basic_filebuf< _CharT, _Traits >::_M_exit_putback_mode().

◆ _M_state

template<class _CharT , class _Traits >
_State_type basic_filebuf< _CharT, _Traits >::_M_state
private

Definition at line 302 of file _fstream.h.

◆ _M_width

template<class _CharT , class _Traits >
int basic_filebuf< _CharT, _Traits >::_M_width
private

Definition at line 322 of file _fstream.h.


The documentation for this class was generated from the following files: