1 /* Copyright (C) 1993-2014 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Written by Ulrich Drepper <drepper@cygnus.com>.
4 Based on the single byte version by Per Bothner <bothner@cygnus.com>.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>.
20 As a special exception, if you link the code in this file with
21 files compiled with a GNU compiler to produce an executable,
22 that does not cause the resulting executable to be covered by
23 the GNU Lesser General Public License. This exception does not
24 however invalidate any other reasons why the executable file
25 might be covered by the GNU Lesser General Public License.
26 This exception applies to code released by its copyright holders
27 in files containing the exception. */
38 # define _IO_new_do_write _IO_do_write
39 # define _IO_new_file_attach _IO_file_attach
40 # define _IO_new_file_close_it _IO_file_close_it
41 # define _IO_new_file_finish _IO_file_finish
42 # define _IO_new_file_fopen _IO_file_fopen
43 # define _IO_new_file_init _IO_file_init
44 # define _IO_new_file_setbuf _IO_file_setbuf
45 # define _IO_new_file_sync _IO_file_sync
46 # define _IO_new_file_overflow _IO_file_overflow
47 # define _IO_new_file_seekoff _IO_file_seekoff
48 # define _IO_new_file_underflow _IO_file_underflow
49 # define _IO_new_file_write _IO_file_write
50 # define _IO_new_file_xsputn _IO_file_xsputn
54 /* Convert TO_DO wide character from DATA to FP.
55 Then mark FP as having empty buffers. */
57 _IO_wdo_write (fp, data, to_do)
62 struct _IO_codecvt *cc = fp->_codecvt;
66 if (fp->_IO_write_end == fp->_IO_write_ptr
67 && fp->_IO_write_end != fp->_IO_write_base)
69 if (_IO_new_do_write (fp, fp->_IO_write_base,
70 fp->_IO_write_ptr - fp->_IO_write_base) == EOF)
76 enum __codecvt_result result;
77 const wchar_t *new_data;
79 /* Now convert from the internal format into the external buffer. */
80 result = (*cc->__codecvt_do_out) (cc, &fp->_wide_data->_IO_state,
81 data, data + to_do, &new_data,
86 /* Write out what we produced so far. */
87 if (_IO_new_do_write (fp, fp->_IO_write_base,
88 fp->_IO_write_ptr - fp->_IO_write_base) == EOF)
89 /* Something went wrong. */
92 to_do -= new_data - data;
94 /* Next see whether we had problems during the conversion. If yes,
96 if (result != __codecvt_ok
97 && (result != __codecvt_partial || new_data - data == 0))
105 _IO_wsetg (fp, fp->_wide_data->_IO_buf_base, fp->_wide_data->_IO_buf_base,
106 fp->_wide_data->_IO_buf_base);
107 fp->_wide_data->_IO_write_base = fp->_wide_data->_IO_write_ptr
108 = fp->_wide_data->_IO_buf_base;
109 fp->_wide_data->_IO_write_end = ((fp->_flags & (_IO_LINE_BUF+_IO_UNBUFFERED))
110 ? fp->_wide_data->_IO_buf_base
111 : fp->_wide_data->_IO_buf_end);
113 return to_do == 0 ? 0 : WEOF;
115 libc_hidden_def (_IO_wdo_write)
119 _IO_wfile_underflow (fp)
122 struct _IO_codecvt *cd;
123 enum __codecvt_result status;
126 if (__builtin_expect (fp->_flags & _IO_NO_READS, 0))
128 fp->_flags |= _IO_ERR_SEEN;
132 if (fp->_wide_data->_IO_read_ptr < fp->_wide_data->_IO_read_end)
133 return *fp->_wide_data->_IO_read_ptr;
137 /* Maybe there is something left in the external buffer. */
138 if (fp->_IO_read_ptr < fp->_IO_read_end)
140 /* There is more in the external. Convert it. */
141 const char *read_stop = (const char *) fp->_IO_read_ptr;
143 fp->_wide_data->_IO_last_state = fp->_wide_data->_IO_state;
144 fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_read_ptr =
145 fp->_wide_data->_IO_buf_base;
146 status = (*cd->__codecvt_do_in) (cd, &fp->_wide_data->_IO_state,
147 fp->_IO_read_ptr, fp->_IO_read_end,
149 fp->_wide_data->_IO_read_ptr,
150 fp->_wide_data->_IO_buf_end,
151 &fp->_wide_data->_IO_read_end);
153 fp->_IO_read_base = fp->_IO_read_ptr;
154 fp->_IO_read_ptr = (char *) read_stop;
156 /* If we managed to generate some text return the next character. */
157 if (fp->_wide_data->_IO_read_ptr < fp->_wide_data->_IO_read_end)
158 return *fp->_wide_data->_IO_read_ptr;
160 if (status == __codecvt_error)
162 __set_errno (EILSEQ);
163 fp->_flags |= _IO_ERR_SEEN;
167 /* Move the remaining content of the read buffer to the beginning. */
168 memmove (fp->_IO_buf_base, fp->_IO_read_ptr,
169 fp->_IO_read_end - fp->_IO_read_ptr);
170 fp->_IO_read_end = (fp->_IO_buf_base
171 + (fp->_IO_read_end - fp->_IO_read_ptr));
172 fp->_IO_read_base = fp->_IO_read_ptr = fp->_IO_buf_base;
175 fp->_IO_read_base = fp->_IO_read_ptr = fp->_IO_read_end =
178 if (fp->_IO_buf_base == NULL)
180 /* Maybe we already have a push back pointer. */
181 if (fp->_IO_save_base != NULL)
183 free (fp->_IO_save_base);
184 fp->_flags &= ~_IO_IN_BACKUP;
188 fp->_IO_read_base = fp->_IO_read_ptr = fp->_IO_read_end =
192 fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_write_end =
195 if (fp->_wide_data->_IO_buf_base == NULL)
197 /* Maybe we already have a push back pointer. */
198 if (fp->_wide_data->_IO_save_base != NULL)
200 free (fp->_wide_data->_IO_save_base);
201 fp->_flags &= ~_IO_IN_BACKUP;
203 _IO_wdoallocbuf (fp);
206 /* Flush all line buffered files before reading. */
207 /* FIXME This can/should be moved to genops ?? */
208 if (fp->_flags & (_IO_LINE_BUF|_IO_UNBUFFERED))
211 _IO_flush_all_linebuffered ();
213 /* We used to flush all line-buffered stream. This really isn't
214 required by any standard. My recollection is that
215 traditional Unix systems did this for stdout. stderr better
216 not be line buffered. So we do just that here
217 explicitly. --drepper */
218 _IO_acquire_lock (_IO_stdout);
220 if ((_IO_stdout->_flags & (_IO_LINKED | _IO_NO_WRITES | _IO_LINE_BUF))
221 == (_IO_LINKED | _IO_LINE_BUF))
222 _IO_OVERFLOW (_IO_stdout, EOF);
224 _IO_release_lock (_IO_stdout);
228 _IO_switch_to_get_mode (fp);
230 fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_read_ptr =
231 fp->_wide_data->_IO_buf_base;
232 fp->_wide_data->_IO_read_end = fp->_wide_data->_IO_buf_base;
233 fp->_wide_data->_IO_write_base = fp->_wide_data->_IO_write_ptr =
234 fp->_wide_data->_IO_write_end = fp->_wide_data->_IO_buf_base;
236 const char *read_ptr_copy;
237 char accbuf[MB_LEN_MAX];
240 count = _IO_SYSREAD (fp, fp->_IO_read_end,
241 fp->_IO_buf_end - fp->_IO_read_end);
244 if (count == 0 && naccbuf == 0)
245 fp->_flags |= _IO_EOF_SEEN;
247 fp->_flags |= _IO_ERR_SEEN, count = 0;
249 fp->_IO_read_end += count;
253 /* There are some bytes in the external buffer but they don't
254 convert to anything. */
255 __set_errno (EILSEQ);
258 if (fp->_offset != _IO_pos_BAD)
259 _IO_pos_adjust (fp->_offset, count);
261 /* Now convert the read input. */
262 fp->_wide_data->_IO_last_state = fp->_wide_data->_IO_state;
263 fp->_IO_read_base = fp->_IO_read_ptr;
264 const char *from = fp->_IO_read_ptr;
265 const char *to = fp->_IO_read_end;
266 size_t to_copy = count;
267 if (__builtin_expect (naccbuf != 0, 0))
269 to_copy = MIN (sizeof (accbuf) - naccbuf, count);
270 to = __mempcpy (&accbuf[naccbuf], from, to_copy);
274 status = (*cd->__codecvt_do_in) (cd, &fp->_wide_data->_IO_state,
275 from, to, &read_ptr_copy,
276 fp->_wide_data->_IO_read_end,
277 fp->_wide_data->_IO_buf_end,
278 &fp->_wide_data->_IO_read_end);
280 if (__builtin_expect (naccbuf != 0, 0))
281 fp->_IO_read_ptr += MAX (0, read_ptr_copy - &accbuf[naccbuf - to_copy]);
283 fp->_IO_read_ptr = (char *) read_ptr_copy;
284 if (fp->_wide_data->_IO_read_end == fp->_wide_data->_IO_buf_base)
286 if (status == __codecvt_error)
289 __set_errno (EILSEQ);
290 fp->_flags |= _IO_ERR_SEEN;
294 /* The read bytes make no complete character. Try reading again. */
295 assert (status == __codecvt_partial);
299 if (fp->_IO_read_base < fp->_IO_read_ptr)
301 /* Partially used the buffer for some input data that
302 produces no output. */
303 size_t avail = fp->_IO_read_end - fp->_IO_read_ptr;
304 memmove (fp->_IO_read_base, fp->_IO_read_ptr, avail);
305 fp->_IO_read_ptr = fp->_IO_read_base;
306 fp->_IO_read_end -= avail;
309 naccbuf = fp->_IO_read_end - fp->_IO_read_ptr;
310 if (naccbuf >= sizeof (accbuf))
313 memcpy (accbuf, fp->_IO_read_ptr, naccbuf);
317 size_t used = read_ptr_copy - accbuf;
320 memmove (accbuf, read_ptr_copy, naccbuf - used);
324 if (naccbuf == sizeof (accbuf))
328 fp->_IO_read_ptr = fp->_IO_read_end = fp->_IO_read_base;
333 return *fp->_wide_data->_IO_read_ptr;
335 libc_hidden_def (_IO_wfile_underflow)
339 _IO_wfile_underflow_mmap (_IO_FILE *fp)
341 struct _IO_codecvt *cd;
342 const char *read_stop;
344 if (__builtin_expect (fp->_flags & _IO_NO_READS, 0))
346 fp->_flags |= _IO_ERR_SEEN;
350 if (fp->_wide_data->_IO_read_ptr < fp->_wide_data->_IO_read_end)
351 return *fp->_wide_data->_IO_read_ptr;
355 /* Maybe there is something left in the external buffer. */
356 if (fp->_IO_read_ptr >= fp->_IO_read_end
357 /* No. But maybe the read buffer is not fully set up. */
358 && _IO_file_underflow_mmap (fp) == EOF)
359 /* Nothing available. _IO_file_underflow_mmap has set the EOF or error
360 flags as appropriate. */
363 /* There is more in the external. Convert it. */
364 read_stop = (const char *) fp->_IO_read_ptr;
366 if (fp->_wide_data->_IO_buf_base == NULL)
368 /* Maybe we already have a push back pointer. */
369 if (fp->_wide_data->_IO_save_base != NULL)
371 free (fp->_wide_data->_IO_save_base);
372 fp->_flags &= ~_IO_IN_BACKUP;
374 _IO_wdoallocbuf (fp);
377 fp->_wide_data->_IO_last_state = fp->_wide_data->_IO_state;
378 fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_read_ptr =
379 fp->_wide_data->_IO_buf_base;
380 (*cd->__codecvt_do_in) (cd, &fp->_wide_data->_IO_state,
381 fp->_IO_read_ptr, fp->_IO_read_end,
383 fp->_wide_data->_IO_read_ptr,
384 fp->_wide_data->_IO_buf_end,
385 &fp->_wide_data->_IO_read_end);
387 fp->_IO_read_ptr = (char *) read_stop;
389 /* If we managed to generate some text return the next character. */
390 if (fp->_wide_data->_IO_read_ptr < fp->_wide_data->_IO_read_end)
391 return *fp->_wide_data->_IO_read_ptr;
393 /* There is some garbage at the end of the file. */
394 __set_errno (EILSEQ);
395 fp->_flags |= _IO_ERR_SEEN;
400 _IO_wfile_underflow_maybe_mmap (_IO_FILE *fp)
402 /* This is the first read attempt. Doing the underflow will choose mmap
403 or vanilla operations and then punt to the chosen underflow routine.
404 Then we can punt to ours. */
405 if (_IO_file_underflow_maybe_mmap (fp) == EOF)
408 return _IO_WUNDERFLOW (fp);
413 _IO_wfile_overflow (f, wch)
417 if (f->_flags & _IO_NO_WRITES) /* SET ERROR */
419 f->_flags |= _IO_ERR_SEEN;
423 /* If currently reading or no buffer allocated. */
424 if ((f->_flags & _IO_CURRENTLY_PUTTING) == 0)
426 /* Allocate a buffer if needed. */
427 if (f->_wide_data->_IO_write_base == 0)
430 _IO_wsetg (f, f->_wide_data->_IO_buf_base,
431 f->_wide_data->_IO_buf_base, f->_wide_data->_IO_buf_base);
433 if (f->_IO_write_base == NULL)
436 _IO_setg (f, f->_IO_buf_base, f->_IO_buf_base, f->_IO_buf_base);
441 /* Otherwise must be currently reading. If _IO_read_ptr
442 (and hence also _IO_read_end) is at the buffer end,
443 logically slide the buffer forwards one block (by setting
444 the read pointers to all point at the beginning of the
445 block). This makes room for subsequent output.
446 Otherwise, set the read pointers to _IO_read_end (leaving
447 that alone, so it can continue to correspond to the
448 external position). */
449 if (f->_wide_data->_IO_read_ptr == f->_wide_data->_IO_buf_end)
451 f->_IO_read_end = f->_IO_read_ptr = f->_IO_buf_base;
452 f->_wide_data->_IO_read_end = f->_wide_data->_IO_read_ptr =
453 f->_wide_data->_IO_buf_base;
456 f->_wide_data->_IO_write_ptr = f->_wide_data->_IO_read_ptr;
457 f->_wide_data->_IO_write_base = f->_wide_data->_IO_write_ptr;
458 f->_wide_data->_IO_write_end = f->_wide_data->_IO_buf_end;
459 f->_wide_data->_IO_read_base = f->_wide_data->_IO_read_ptr =
460 f->_wide_data->_IO_read_end;
462 f->_IO_write_ptr = f->_IO_read_ptr;
463 f->_IO_write_base = f->_IO_write_ptr;
464 f->_IO_write_end = f->_IO_buf_end;
465 f->_IO_read_base = f->_IO_read_ptr = f->_IO_read_end;
467 f->_flags |= _IO_CURRENTLY_PUTTING;
468 if (f->_flags & (_IO_LINE_BUF+_IO_UNBUFFERED))
469 f->_wide_data->_IO_write_end = f->_wide_data->_IO_write_ptr;
472 return _IO_do_flush (f);
473 if (f->_wide_data->_IO_write_ptr == f->_wide_data->_IO_buf_end)
474 /* Buffer is really full */
475 if (_IO_do_flush (f) == EOF)
477 *f->_wide_data->_IO_write_ptr++ = wch;
478 if ((f->_flags & _IO_UNBUFFERED)
479 || ((f->_flags & _IO_LINE_BUF) && wch == L'\n'))
480 if (_IO_do_flush (f) == EOF)
484 libc_hidden_def (_IO_wfile_overflow)
493 /* char* ptr = cur_ptr(); */
494 if (fp->_wide_data->_IO_write_ptr > fp->_wide_data->_IO_write_base)
495 if (_IO_do_flush (fp))
497 delta = fp->_wide_data->_IO_read_ptr - fp->_wide_data->_IO_read_end;
500 /* We have to find out how many bytes we have to go back in the
502 struct _IO_codecvt *cv = fp->_codecvt;
505 int clen = (*cv->__codecvt_do_encoding) (cv);
508 /* It is easy, a fixed number of input bytes are used for each
513 /* We have to find out the hard way how much to back off.
514 To do this we determine how much input we needed to
515 generate the wide characters up to the current reading
519 fp->_wide_data->_IO_state = fp->_wide_data->_IO_last_state;
520 nread = (*cv->__codecvt_do_length) (cv, &fp->_wide_data->_IO_state,
522 fp->_IO_read_end, delta);
523 fp->_IO_read_ptr = fp->_IO_read_base + nread;
524 delta = -(fp->_IO_read_end - fp->_IO_read_base - nread);
527 new_pos = _IO_SYSSEEK (fp, delta, 1);
528 if (new_pos != (_IO_off64_t) EOF)
530 fp->_wide_data->_IO_read_end = fp->_wide_data->_IO_read_ptr;
531 fp->_IO_read_end = fp->_IO_read_ptr;
534 else if (errno == ESPIPE)
535 ; /* Ignore error from unseekable devices. */
541 fp->_offset = _IO_pos_BAD;
542 /* FIXME: Cleanup - can this be shared? */
543 /* setg(base(), ptr, ptr); */
546 libc_hidden_def (_IO_wfile_sync)
548 /* Adjust the internal buffer pointers to reflect the state in the external
549 buffer. The content between fp->_IO_read_base and fp->_IO_read_ptr is
550 assumed to be converted and available in the range
551 fp->_wide_data->_IO_read_base and fp->_wide_data->_IO_read_end.
553 Returns 0 on success and -1 on error with the _IO_ERR_SEEN flag set. */
555 adjust_wide_data (_IO_FILE *fp, bool do_convert)
557 struct _IO_codecvt *cv = fp->_codecvt;
559 int clen = (*cv->__codecvt_do_encoding) (cv);
561 /* Take the easy way out for constant length encodings if we don't need to
563 if (!do_convert && clen > 0)
565 fp->_wide_data->_IO_read_end += ((fp->_IO_read_ptr - fp->_IO_read_base)
570 enum __codecvt_result status;
571 const char *read_stop = (const char *) fp->_IO_read_base;
575 fp->_wide_data->_IO_last_state = fp->_wide_data->_IO_state;
576 status = (*cv->__codecvt_do_in) (cv, &fp->_wide_data->_IO_state,
577 fp->_IO_read_base, fp->_IO_read_ptr,
579 fp->_wide_data->_IO_read_base,
580 fp->_wide_data->_IO_buf_end,
581 &fp->_wide_data->_IO_read_end);
583 /* Should we return EILSEQ? */
584 if (__builtin_expect (status == __codecvt_error, 0))
586 fp->_flags |= _IO_ERR_SEEN;
590 while (__builtin_expect (status == __codecvt_partial, 0));
593 /* Now seek to _IO_read_end to behave as if we have read it all in. */
594 fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_end;
600 _IO_wfile_seekoff (fp, offset, dir, mode)
607 _IO_off64_t delta, new_offset;
609 /* POSIX.1 8.2.3.7 says that after a call the fflush() the file
610 offset of the underlying file must be exact. */
611 int must_be_exact = ((fp->_wide_data->_IO_read_base
612 == fp->_wide_data->_IO_read_end)
613 && (fp->_wide_data->_IO_write_base
614 == fp->_wide_data->_IO_write_ptr));
616 bool was_writing = ((fp->_wide_data->_IO_write_ptr
617 > fp->_wide_data->_IO_write_base)
618 || _IO_in_put_mode (fp));
622 /* XXX For wide stream with backup store it is not very
623 reasonable to determine the offset. The pushed-back
624 character might require a state change and we need not be
625 able to compute the initial state by reverse transformation
626 since there is no guarantee of symmetry. So we don't even
627 try and return an error. */
628 if (_IO_in_backup (fp))
630 if (fp->_wide_data->_IO_read_ptr < fp->_wide_data->_IO_read_end)
632 __set_errno (EINVAL);
636 /* There is no more data in the backup buffer. We can
638 _IO_switch_to_main_wget_area (fp);
641 dir = _IO_seek_cur, offset = 0; /* Don't move any pointers. */
644 /* Flush unwritten characters.
645 (This may do an unneeded write if we seek within the buffer.
646 But to be able to switch to reading, we would need to set
647 egptr to pptr. That can't be done in the current design,
648 which assumes file_ptr() is eGptr. Anyway, since we probably
649 end up flushing when we close(), it doesn't make much difference.)
650 FIXME: simulate mem-mapped files. */
651 else if (was_writing && _IO_switch_to_wget_mode (fp))
654 if (fp->_wide_data->_IO_buf_base == NULL)
656 /* It could be that we already have a pushback buffer. */
657 if (fp->_wide_data->_IO_read_base != NULL)
659 free (fp->_wide_data->_IO_read_base);
660 fp->_flags &= ~_IO_IN_BACKUP;
663 _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base);
664 _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base);
665 _IO_wsetp (fp, fp->_wide_data->_IO_buf_base,
666 fp->_wide_data->_IO_buf_base);
667 _IO_wsetg (fp, fp->_wide_data->_IO_buf_base,
668 fp->_wide_data->_IO_buf_base, fp->_wide_data->_IO_buf_base);
673 struct _IO_codecvt *cv;
677 /* Adjust for read-ahead (bytes is buffer). To do this we must
678 find out which position in the external buffer corresponds to
679 the current position in the internal buffer. */
681 clen = (*cv->__codecvt_do_encoding) (cv);
683 if (mode != 0 || !was_writing)
687 offset -= (fp->_wide_data->_IO_read_end
688 - fp->_wide_data->_IO_read_ptr) * clen;
689 /* Adjust by readahead in external buffer. */
690 offset -= fp->_IO_read_end - fp->_IO_read_ptr;
697 delta = (fp->_wide_data->_IO_read_ptr
698 - fp->_wide_data->_IO_read_base);
699 fp->_wide_data->_IO_state = fp->_wide_data->_IO_last_state;
700 nread = (*cv->__codecvt_do_length) (cv,
701 &fp->_wide_data->_IO_state,
703 fp->_IO_read_end, delta);
704 fp->_IO_read_ptr = fp->_IO_read_base + nread;
705 fp->_wide_data->_IO_read_end = fp->_wide_data->_IO_read_ptr;
706 offset -= fp->_IO_read_end - fp->_IO_read_base - nread;
711 char *new_write_ptr = fp->_IO_write_ptr;
714 offset += (fp->_wide_data->_IO_write_ptr
715 - fp->_wide_data->_IO_write_base) / clen;
718 enum __codecvt_result status;
719 delta = (fp->_wide_data->_IO_write_ptr
720 - fp->_wide_data->_IO_write_base);
721 const wchar_t *write_base = fp->_wide_data->_IO_write_base;
723 /* FIXME: This actually ends up in two iterations of conversion,
724 one here and the next when the buffer actually gets flushed.
725 It may be possible to optimize this in future so that
726 wdo_write identifies already converted content and does not
727 redo it. In any case, this is much better than having to
728 flush buffers for every ftell. */
731 /* Ugh, no point trying to avoid the flush. Just do it
732 and go back to how it was with the read mode. */
733 if (delta > 0 && new_write_ptr == fp->_IO_buf_end)
735 if (_IO_switch_to_wget_mode (fp))
740 const wchar_t *new_wbase = fp->_wide_data->_IO_write_base;
741 fp->_wide_data->_IO_state = fp->_wide_data->_IO_last_state;
742 status = (*cv->__codecvt_do_out) (cv,
743 &fp->_wide_data->_IO_state,
751 delta -= new_wbase - write_base;
753 /* If there was an error, then return WEOF.
754 TODO: set buffer state. */
755 if (__builtin_expect (status == __codecvt_error, 0))
761 /* _IO_read_end coincides with fp._offset, so the actual file position
762 is fp._offset - (_IO_read_end - new_write_ptr). This is fine
763 even if fp._offset is not set, since fp->_IO_read_end is then at
764 _IO_buf_base and this adjustment is for unbuffered output. */
765 offset -= fp->_IO_read_end - new_write_ptr;
768 if (fp->_offset == _IO_pos_BAD)
774 result = _IO_SYSSEEK (fp, 0, dir);
777 fp->_offset = result;
781 /* Make offset absolute, assuming current pointer is file_ptr(). */
782 offset += fp->_offset;
791 if (_IO_SYSSTAT (fp, &st) == 0 && S_ISREG (st.st_mode))
793 offset += st.st_size;
800 /* At this point, dir==_IO_seek_set. */
802 /* If we are only interested in the current position we've found it now. */
806 /* If destination is within current buffer, optimize: */
807 if (fp->_offset != _IO_pos_BAD && fp->_IO_read_base != NULL
808 && !_IO_in_backup (fp))
810 _IO_off64_t start_offset = (fp->_offset
811 - (fp->_IO_read_end - fp->_IO_buf_base));
812 if (offset >= start_offset && offset < fp->_offset)
814 _IO_setg (fp, fp->_IO_buf_base,
815 fp->_IO_buf_base + (offset - start_offset),
817 _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base);
818 _IO_wsetg (fp, fp->_wide_data->_IO_buf_base,
819 fp->_wide_data->_IO_buf_base,
820 fp->_wide_data->_IO_buf_base);
821 _IO_wsetp (fp, fp->_wide_data->_IO_buf_base,
822 fp->_wide_data->_IO_buf_base);
824 if (adjust_wide_data (fp, false))
827 _IO_mask_flags (fp, 0, _IO_EOF_SEEN);
832 if (fp->_flags & _IO_NO_READS)
835 /* Try to seek to a block boundary, to improve kernel page management. */
836 new_offset = offset & ~(fp->_IO_buf_end - fp->_IO_buf_base - 1);
837 delta = offset - new_offset;
838 if (delta > fp->_IO_buf_end - fp->_IO_buf_base)
843 result = _IO_SYSSEEK (fp, new_offset, 0);
850 count = _IO_SYSREAD (fp, fp->_IO_buf_base,
852 ? delta : fp->_IO_buf_end - fp->_IO_buf_base));
855 /* We weren't allowed to read, but try to seek the remainder. */
856 offset = count == EOF ? delta : delta-count;
861 _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base + delta,
862 fp->_IO_buf_base + count);
863 _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base);
864 _IO_wsetg (fp, fp->_wide_data->_IO_buf_base,
865 fp->_wide_data->_IO_buf_base, fp->_wide_data->_IO_buf_base);
866 _IO_wsetp (fp, fp->_wide_data->_IO_buf_base, fp->_wide_data->_IO_buf_base);
868 if (adjust_wide_data (fp, true))
871 fp->_offset = result + count;
872 _IO_mask_flags (fp, 0, _IO_EOF_SEEN);
876 _IO_unsave_markers (fp);
877 result = _IO_SYSSEEK (fp, offset, dir);
880 _IO_mask_flags (fp, 0, _IO_EOF_SEEN);
881 fp->_offset = result;
882 _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base);
883 _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base);
884 _IO_wsetg (fp, fp->_wide_data->_IO_buf_base,
885 fp->_wide_data->_IO_buf_base, fp->_wide_data->_IO_buf_base);
886 _IO_wsetp (fp, fp->_wide_data->_IO_buf_base,
887 fp->_wide_data->_IO_buf_base);
892 /* We need to do it since it is possible that the file offset in
893 the kernel may be changed behind our back. It may happen when
894 we fopen a file and then do a fork. One process may access the
895 file and the kernel file offset will be changed. */
896 if (fp->_offset >= 0)
897 _IO_SYSSEEK (fp, fp->_offset, 0);
901 libc_hidden_def (_IO_wfile_seekoff)
905 _IO_wfile_xsputn (f, data, n)
910 const wchar_t *s = (const wchar_t *) data;
911 _IO_size_t to_do = n;
917 /* This is an optimized implementation.
918 If the amount to be written straddles a block boundary
919 (or the filebuf is unbuffered), use sys_write directly. */
921 /* First figure out how much space is available in the buffer. */
922 count = f->_wide_data->_IO_write_end - f->_wide_data->_IO_write_ptr;
923 if ((f->_flags & _IO_LINE_BUF) && (f->_flags & _IO_CURRENTLY_PUTTING))
925 count = f->_wide_data->_IO_buf_end - f->_wide_data->_IO_write_ptr;
929 for (p = s + n; p > s; )
940 /* Then fill the buffer. */
948 f->_wide_data->_IO_write_ptr =
949 __wmempcpy (f->_wide_data->_IO_write_ptr, s, count);
951 wmemcpy (f->_wide_data->_IO_write_ptr, s, count);
952 f->_wide_data->_IO_write_ptr += count;
958 wchar_t *p = f->_wide_data->_IO_write_ptr;
962 f->_wide_data->_IO_write_ptr = p;
967 to_do -= _IO_wdefault_xsputn (f, s, to_do);
969 && f->_wide_data->_IO_write_ptr != f->_wide_data->_IO_write_base)
970 _IO_wdo_write (f, f->_wide_data->_IO_write_base,
971 f->_wide_data->_IO_write_ptr
972 - f->_wide_data->_IO_write_base);
976 libc_hidden_def (_IO_wfile_xsputn)
979 const struct _IO_jump_t _IO_wfile_jumps =
982 JUMP_INIT(finish, _IO_new_file_finish),
983 JUMP_INIT(overflow, (_IO_overflow_t) _IO_wfile_overflow),
984 JUMP_INIT(underflow, (_IO_underflow_t) _IO_wfile_underflow),
985 JUMP_INIT(uflow, (_IO_underflow_t) _IO_wdefault_uflow),
986 JUMP_INIT(pbackfail, (_IO_pbackfail_t) _IO_wdefault_pbackfail),
987 JUMP_INIT(xsputn, _IO_wfile_xsputn),
988 JUMP_INIT(xsgetn, _IO_file_xsgetn),
989 JUMP_INIT(seekoff, _IO_wfile_seekoff),
990 JUMP_INIT(seekpos, _IO_default_seekpos),
991 JUMP_INIT(setbuf, _IO_new_file_setbuf),
992 JUMP_INIT(sync, (_IO_sync_t) _IO_wfile_sync),
993 JUMP_INIT(doallocate, _IO_wfile_doallocate),
994 JUMP_INIT(read, _IO_file_read),
995 JUMP_INIT(write, _IO_new_file_write),
996 JUMP_INIT(seek, _IO_file_seek),
997 JUMP_INIT(close, _IO_file_close),
998 JUMP_INIT(stat, _IO_file_stat),
999 JUMP_INIT(showmanyc, _IO_default_showmanyc),
1000 JUMP_INIT(imbue, _IO_default_imbue)
1002 libc_hidden_data_def (_IO_wfile_jumps)
1005 const struct _IO_jump_t _IO_wfile_jumps_mmap =
1008 JUMP_INIT(finish, _IO_new_file_finish),
1009 JUMP_INIT(overflow, (_IO_overflow_t) _IO_wfile_overflow),
1010 JUMP_INIT(underflow, (_IO_underflow_t) _IO_wfile_underflow_mmap),
1011 JUMP_INIT(uflow, (_IO_underflow_t) _IO_wdefault_uflow),
1012 JUMP_INIT(pbackfail, (_IO_pbackfail_t) _IO_wdefault_pbackfail),
1013 JUMP_INIT(xsputn, _IO_wfile_xsputn),
1014 JUMP_INIT(xsgetn, _IO_file_xsgetn),
1015 JUMP_INIT(seekoff, _IO_wfile_seekoff),
1016 JUMP_INIT(seekpos, _IO_default_seekpos),
1017 JUMP_INIT(setbuf, _IO_file_setbuf_mmap),
1018 JUMP_INIT(sync, (_IO_sync_t) _IO_wfile_sync),
1019 JUMP_INIT(doallocate, _IO_wfile_doallocate),
1020 JUMP_INIT(read, _IO_file_read),
1021 JUMP_INIT(write, _IO_new_file_write),
1022 JUMP_INIT(seek, _IO_file_seek),
1023 JUMP_INIT(close, _IO_file_close_mmap),
1024 JUMP_INIT(stat, _IO_file_stat),
1025 JUMP_INIT(showmanyc, _IO_default_showmanyc),
1026 JUMP_INIT(imbue, _IO_default_imbue)
1029 const struct _IO_jump_t _IO_wfile_jumps_maybe_mmap =
1032 JUMP_INIT(finish, _IO_new_file_finish),
1033 JUMP_INIT(overflow, (_IO_overflow_t) _IO_wfile_overflow),
1034 JUMP_INIT(underflow, (_IO_underflow_t) _IO_wfile_underflow_maybe_mmap),
1035 JUMP_INIT(uflow, (_IO_underflow_t) _IO_wdefault_uflow),
1036 JUMP_INIT(pbackfail, (_IO_pbackfail_t) _IO_wdefault_pbackfail),
1037 JUMP_INIT(xsputn, _IO_wfile_xsputn),
1038 JUMP_INIT(xsgetn, _IO_file_xsgetn),
1039 JUMP_INIT(seekoff, _IO_wfile_seekoff),
1040 JUMP_INIT(seekpos, _IO_default_seekpos),
1041 JUMP_INIT(setbuf, _IO_file_setbuf_mmap),
1042 JUMP_INIT(sync, (_IO_sync_t) _IO_wfile_sync),
1043 JUMP_INIT(doallocate, _IO_wfile_doallocate),
1044 JUMP_INIT(read, _IO_file_read),
1045 JUMP_INIT(write, _IO_new_file_write),
1046 JUMP_INIT(seek, _IO_file_seek),
1047 JUMP_INIT(close, _IO_file_close),
1048 JUMP_INIT(stat, _IO_file_stat),
1049 JUMP_INIT(showmanyc, _IO_default_showmanyc),
1050 JUMP_INIT(imbue, _IO_default_imbue)