1 /* Copyright (C) 1993, 1995, 1997-2002, 2003 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Written by Per Bothner <bothner@cygnus.com>.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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. */
31 # define _POSIX_SOURCE
36 #include <sys/param.h>
37 #include <sys/types.h>
46 # include "../wcsmbs/wcsmbsload.h"
47 # include "../iconv/gconv_charset.h"
48 # include "../iconv/gconv_int.h"
49 # include <shlib-compat.h>
55 # define __set_errno(Val) errno = (Val)
60 # define open(Name, Flags, Prot) __open (Name, Flags, Prot)
61 # define close(FD) __close (FD)
62 # define lseek(FD, Offset, Whence) __lseek (FD, Offset, Whence)
63 # define read(FD, Buf, NBytes) __read (FD, Buf, NBytes)
64 # define write(FD, Buf, NBytes) __write (FD, Buf, NBytes)
65 # define _IO_do_write _IO_new_do_write /* For macro uses. */
67 # define _IO_new_do_write _IO_do_write
68 # define _IO_new_file_attach _IO_file_attach
69 # define _IO_new_file_close_it _IO_file_close_it
70 # define _IO_new_file_finish _IO_file_finish
71 # define _IO_new_file_fopen _IO_file_fopen
72 # define _IO_new_file_init _IO_file_init
73 # define _IO_new_file_setbuf _IO_file_setbuf
74 # define _IO_new_file_sync _IO_file_sync
75 # define _IO_new_file_overflow _IO_file_overflow
76 # define _IO_new_file_seekoff _IO_file_seekoff
77 # define _IO_new_file_underflow _IO_file_underflow
78 # define _IO_new_file_write _IO_file_write
79 # define _IO_new_file_xsputn _IO_file_xsputn
84 extern struct __gconv_trans_data __libio_translit attribute_hidden
;
88 /* An fstream can be in at most one of put mode, get mode, or putback mode.
89 Putback mode is a variant of get mode.
91 In a filebuf, there is only one current position, instead of two
92 separate get and put pointers. In get mode, the current position
93 is that of gptr(); in put mode that of pptr().
95 The position in the buffer that corresponds to the position
96 in external file system is normally _IO_read_end, except in putback
97 mode, when it is _IO_save_end.
98 If the field _fb._offset is >= 0, it gives the offset in
99 the file as a whole corresponding to eGptr(). (?)
102 If a filebuf is in put mode, then all of _IO_read_ptr, _IO_read_end,
103 and _IO_read_base are equal to each other. These are usually equal
104 to _IO_buf_base, though not necessarily if we have switched from
105 get mode to put mode. (The reason is to maintain the invariant
106 that _IO_read_end corresponds to the external file position.)
107 _IO_write_base is non-NULL and usually equal to _IO_base_base.
108 We also have _IO_write_end == _IO_buf_end, but only in fully buffered mode.
109 The un-flushed character are those between _IO_write_base and _IO_write_ptr.
112 If a filebuf is in get or putback mode, eback() != egptr().
113 In get mode, the unread characters are between gptr() and egptr().
114 The OS file position corresponds to that of egptr().
117 Putback mode is used to remember "excess" characters that have
118 been sputbackc'd in a separate putback buffer.
119 In putback mode, the get buffer points to the special putback buffer.
120 The unread characters are the characters between gptr() and egptr()
121 in the putback buffer, as well as the area between save_gptr()
122 and save_egptr(), which point into the original reserve buffer.
123 (The pointers save_gptr() and save_egptr() are the values
124 of gptr() and egptr() at the time putback mode was entered.)
125 The OS position corresponds to that of save_egptr().
127 LINE BUFFERED OUTPUT:
128 During line buffered output, _IO_write_base==base() && epptr()==base().
129 However, ptr() may be anywhere between base() and ebuf().
130 This forces a call to filebuf::overflow(int C) on every put.
131 If there is more space in the buffer, and C is not a '\n',
132 then C is inserted, and pptr() incremented.
135 If a filebuf is unbuffered(), the _shortbuf[1] is used as the buffer.
138 #define CLOSED_FILEBUF_FLAGS \
139 (_IO_IS_FILEBUF+_IO_NO_READS+_IO_NO_WRITES+_IO_TIED_PUT_GET)
143 _IO_new_file_init (fp
)
144 struct _IO_FILE_plus
*fp
;
146 /* POSIX.1 allows another file handle to be used to change the position
147 of our file descriptor. Hence we actually don't know the actual
148 position before we do the first fseek (and until a following fflush). */
149 fp
->file
._offset
= _IO_pos_BAD
;
150 fp
->file
._IO_file_flags
|= CLOSED_FILEBUF_FLAGS
;
152 INTUSE(_IO_link_in
) (fp
);
153 fp
->file
._fileno
= -1;
155 INTDEF2(_IO_new_file_init
, _IO_file_init
)
158 _IO_new_file_close_it (fp
)
161 int write_status
, close_status
;
162 if (!_IO_file_is_open (fp
))
165 if ((fp
->_flags
& _IO_NO_WRITES
) == 0
166 && (fp
->_flags
& _IO_CURRENTLY_PUTTING
) != 0)
167 write_status
= _IO_do_flush (fp
);
171 INTUSE(_IO_unsave_markers
) (fp
);
173 close_status
= _IO_SYSCLOSE (fp
);
178 INTUSE(_IO_setb
) (fp
, NULL
, NULL
, 0);
179 _IO_setg (fp
, NULL
, NULL
, NULL
);
180 _IO_setp (fp
, NULL
, NULL
);
182 #if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
185 if (_IO_have_wbackup (fp
))
186 INTUSE(_IO_free_wbackup_area
) (fp
);
187 INTUSE(_IO_wsetb
) (fp
, NULL
, NULL
, 0);
188 _IO_wsetg (fp
, NULL
, NULL
, NULL
);
189 _IO_wsetp (fp
, NULL
, NULL
);
193 INTUSE(_IO_un_link
) ((struct _IO_FILE_plus
*) fp
);
194 fp
->_flags
= _IO_MAGIC
|CLOSED_FILEBUF_FLAGS
;
196 fp
->_offset
= _IO_pos_BAD
;
198 return close_status
? close_status
: write_status
;
200 INTDEF2(_IO_new_file_close_it
, _IO_file_close_it
)
203 _IO_new_file_finish (fp
, dummy
)
207 if (_IO_file_is_open (fp
))
210 if (!(fp
->_flags
& _IO_DELETE_DONT_CLOSE
))
213 INTUSE(_IO_default_finish
) (fp
, 0);
215 INTDEF2(_IO_new_file_finish
, _IO_file_finish
)
217 #if defined __GNUC__ && __GNUC__ >= 2
221 _IO_file_open (fp
, filename
, posix_mode
, prot
, read_write
, is32not64
)
223 const char *filename
;
232 ? open (filename
, posix_mode
, prot
)
233 : _G_OPEN64 (filename
, posix_mode
, prot
));
235 fdesc
= open (filename
, posix_mode
, prot
);
240 _IO_mask_flags (fp
, read_write
,_IO_NO_READS
+_IO_NO_WRITES
+_IO_IS_APPENDING
);
241 if ((read_write
& _IO_IS_APPENDING
) && (read_write
& _IO_NO_READS
))
242 if (_IO_SEEKOFF (fp
, (_IO_off64_t
)0, _IO_seek_end
, _IOS_INPUT
|_IOS_OUTPUT
)
243 == _IO_pos_BAD
&& errno
!= ESPIPE
)
248 INTUSE(_IO_link_in
) ((struct _IO_FILE_plus
*) fp
);
251 libc_hidden_def (_IO_file_open
)
254 _IO_new_file_fopen (fp
, filename
, mode
, is32not64
)
256 const char *filename
;
260 int oflags
= 0, omode
;
267 const char *last_recognized
;
270 if (_IO_file_is_open (fp
))
276 read_write
= _IO_NO_WRITES
;
280 oflags
= O_CREAT
|O_TRUNC
;
281 read_write
= _IO_NO_READS
;
285 oflags
= O_CREAT
|O_APPEND
;
286 read_write
= _IO_NO_READS
|_IO_IS_APPENDING
;
289 __set_errno (EINVAL
);
293 last_recognized
= mode
;
295 for (i
= 1; i
< 5; ++i
)
303 read_write
&= _IO_IS_APPENDING
;
305 last_recognized
= mode
;
311 last_recognized
= mode
;
316 last_recognized
= mode
;
320 fp
->_flags2
|= _IO_FLAGS2_MMAP
;
329 result
= _IO_file_open (fp
, filename
, omode
|oflags
, oprot
, read_write
,
336 /* Test whether the mode string specifies the conversion. */
337 cs
= strstr (last_recognized
+ 1, ",ccs=");
340 /* Yep. Load the appropriate conversions and set the orientation
342 struct gconv_fcts fcts
;
343 struct _IO_codecvt
*cc
;
344 char *endp
= __strchrnul (cs
+ 5, ',');
345 char ccs
[endp
- (cs
+ 5) + 3];
347 *((char *) __mempcpy (ccs
, cs
+ 5, endp
- (cs
+ 5))) = '\0';
350 if (__wcsmbs_named_conv (&fcts
, ccs
[2] == '\0'
351 ? upstr (ccs
, cs
+ 5) : ccs
) != 0)
353 /* Something went wrong, we cannot load the conversion modules.
354 This means we cannot proceed since the user explicitly asked
356 __set_errno (EINVAL
);
360 assert (fcts
.towc_nsteps
== 1);
361 assert (fcts
.tomb_nsteps
== 1);
363 fp
->_wide_data
->_IO_read_ptr
= fp
->_wide_data
->_IO_read_end
;
364 fp
->_wide_data
->_IO_write_ptr
= fp
->_wide_data
->_IO_write_base
;
366 /* Clear the state. We start all over again. */
367 memset (&fp
->_wide_data
->_IO_state
, '\0', sizeof (__mbstate_t
));
368 memset (&fp
->_wide_data
->_IO_last_state
, '\0', sizeof (__mbstate_t
));
370 cc
= fp
->_codecvt
= &fp
->_wide_data
->_codecvt
;
372 /* The functions are always the same. */
373 *cc
= __libio_codecvt
;
375 cc
->__cd_in
.__cd
.__nsteps
= fcts
.towc_nsteps
;
376 cc
->__cd_in
.__cd
.__steps
= fcts
.towc
;
378 cc
->__cd_in
.__cd
.__data
[0].__invocation_counter
= 0;
379 cc
->__cd_in
.__cd
.__data
[0].__internal_use
= 1;
380 cc
->__cd_in
.__cd
.__data
[0].__flags
= __GCONV_IS_LAST
;
381 cc
->__cd_in
.__cd
.__data
[0].__statep
= &result
->_wide_data
->_IO_state
;
383 /* XXX For now no transliteration. */
384 cc
->__cd_in
.__cd
.__data
[0].__trans
= NULL
;
386 cc
->__cd_out
.__cd
.__nsteps
= fcts
.tomb_nsteps
;
387 cc
->__cd_out
.__cd
.__steps
= fcts
.tomb
;
389 cc
->__cd_out
.__cd
.__data
[0].__invocation_counter
= 0;
390 cc
->__cd_out
.__cd
.__data
[0].__internal_use
= 1;
391 cc
->__cd_out
.__cd
.__data
[0].__flags
= __GCONV_IS_LAST
;
392 cc
->__cd_out
.__cd
.__data
[0].__statep
=
393 &result
->_wide_data
->_IO_state
;
395 /* And now the transliteration. */
396 cc
->__cd_out
.__cd
.__data
[0].__trans
= &__libio_translit
;
398 /* Set the mode now. */
401 /* We don't need the step data structure anymore. */
402 __gconv_release_cache (fcts
.towc
, fcts
.towc_nsteps
);
403 __gconv_release_cache (fcts
.tomb
, fcts
.tomb_nsteps
);
406 #endif /* GNU libc */
410 INTDEF2(_IO_new_file_fopen
, _IO_file_fopen
)
413 _IO_new_file_attach (fp
, fd
)
417 if (_IO_file_is_open (fp
))
420 fp
->_flags
&= ~(_IO_NO_READS
+_IO_NO_WRITES
);
421 fp
->_flags
|= _IO_DELETE_DONT_CLOSE
;
422 /* Get the current position of the file. */
423 /* We have to do that since that may be junk. */
424 fp
->_offset
= _IO_pos_BAD
;
425 if (_IO_SEEKOFF (fp
, (_IO_off64_t
)0, _IO_seek_cur
, _IOS_INPUT
|_IOS_OUTPUT
)
426 == _IO_pos_BAD
&& errno
!= ESPIPE
)
430 INTDEF2(_IO_new_file_attach
, _IO_file_attach
)
433 _IO_new_file_setbuf (fp
, p
, len
)
438 if (_IO_default_setbuf (fp
, p
, len
) == NULL
)
441 fp
->_IO_write_base
= fp
->_IO_write_ptr
= fp
->_IO_write_end
443 _IO_setg (fp
, fp
->_IO_buf_base
, fp
->_IO_buf_base
, fp
->_IO_buf_base
);
447 INTDEF2(_IO_new_file_setbuf
, _IO_file_setbuf
)
451 _IO_file_setbuf_mmap (fp
, p
, len
)
458 /* Change the function table. */
459 _IO_JUMPS ((struct _IO_FILE_plus
*) fp
) = &INTUSE(_IO_file_jumps
);
460 fp
->_wide_data
->_wide_vtable
= &_IO_wfile_jumps
;
462 /* And perform the normal operation. */
463 result
= _IO_new_file_setbuf (fp
, p
, len
);
465 /* If the call failed, restore to using mmap. */
468 _IO_JUMPS ((struct _IO_FILE_plus
*) fp
) = &_IO_file_jumps_mmap
;
469 fp
->_wide_data
->_wide_vtable
= &_IO_wfile_jumps_mmap
;
475 static int new_do_write
__P ((_IO_FILE
*, const char *, _IO_size_t
));
477 /* Write TO_DO bytes from DATA to FP.
478 Then mark FP as having empty buffers. */
481 _IO_new_do_write (fp
, data
, to_do
)
487 || (_IO_size_t
) new_do_write (fp
, data
, to_do
) == to_do
) ? 0 : EOF
;
489 INTDEF2(_IO_new_do_write
, _IO_do_write
)
493 new_do_write (fp
, data
, to_do
)
499 if (fp
->_flags
& _IO_IS_APPENDING
)
500 /* On a system without a proper O_APPEND implementation,
501 you would need to sys_seek(0, SEEK_END) here, but is
502 is not needed nor desirable for Unix- or Posix-like systems.
503 Instead, just indicate that offset (before and after) is
505 fp
->_offset
= _IO_pos_BAD
;
506 else if (fp
->_IO_read_end
!= fp
->_IO_write_base
)
509 = _IO_SYSSEEK (fp
, fp
->_IO_write_base
- fp
->_IO_read_end
, 1);
510 if (new_pos
== _IO_pos_BAD
)
512 fp
->_offset
= new_pos
;
514 count
= _IO_SYSWRITE (fp
, data
, to_do
);
515 if (fp
->_cur_column
&& count
)
516 fp
->_cur_column
= INTUSE(_IO_adjust_column
) (fp
->_cur_column
- 1, data
,
518 _IO_setg (fp
, fp
->_IO_buf_base
, fp
->_IO_buf_base
, fp
->_IO_buf_base
);
519 fp
->_IO_write_base
= fp
->_IO_write_ptr
= fp
->_IO_buf_base
;
520 fp
->_IO_write_end
= (fp
->_mode
<= 0
521 && (fp
->_flags
& (_IO_LINE_BUF
+_IO_UNBUFFERED
))
522 ? fp
->_IO_buf_base
: fp
->_IO_buf_end
);
527 _IO_new_file_underflow (fp
)
532 /* SysV does not make this test; take it out for compatibility */
533 if (fp
->_flags
& _IO_EOF_SEEN
)
537 if (fp
->_flags
& _IO_NO_READS
)
539 fp
->_flags
|= _IO_ERR_SEEN
;
543 if (fp
->_IO_read_ptr
< fp
->_IO_read_end
)
544 return *(unsigned char *) fp
->_IO_read_ptr
;
546 if (fp
->_IO_buf_base
== NULL
)
548 /* Maybe we already have a push back pointer. */
549 if (fp
->_IO_save_base
!= NULL
)
551 free (fp
->_IO_save_base
);
552 fp
->_flags
&= ~_IO_IN_BACKUP
;
554 INTUSE(_IO_doallocbuf
) (fp
);
557 /* Flush all line buffered files before reading. */
558 /* FIXME This can/should be moved to genops ?? */
559 if (fp
->_flags
& (_IO_LINE_BUF
|_IO_UNBUFFERED
))
562 INTUSE(_IO_flush_all_linebuffered
) ();
564 /* We used to flush all line-buffered stream. This really isn't
565 required by any standard. My recollection is that
566 traditional Unix systems did this for stdout. stderr better
567 not be line buffered. So we do just that here
568 explicitly. --drepper */
569 _IO_cleanup_region_start ((void (*) __P ((void *))) _IO_funlockfile
,
571 _IO_flockfile (_IO_stdout
);
573 if ((_IO_stdout
->_flags
& (_IO_LINKED
| _IO_NO_WRITES
| _IO_LINE_BUF
))
574 == (_IO_LINKED
| _IO_LINE_BUF
))
575 _IO_OVERFLOW (_IO_stdout
, EOF
);
577 _IO_funlockfile (_IO_stdout
);
578 _IO_cleanup_region_end (0);
582 INTUSE(_IO_switch_to_get_mode
) (fp
);
584 /* This is very tricky. We have to adjust those
585 pointers before we call _IO_SYSREAD () since
586 we may longjump () out while waiting for
587 input. Those pointers may be screwed up. H.J. */
588 fp
->_IO_read_base
= fp
->_IO_read_ptr
= fp
->_IO_buf_base
;
589 fp
->_IO_read_end
= fp
->_IO_buf_base
;
590 fp
->_IO_write_base
= fp
->_IO_write_ptr
= fp
->_IO_write_end
593 count
= _IO_SYSREAD (fp
, fp
->_IO_buf_base
,
594 fp
->_IO_buf_end
- fp
->_IO_buf_base
);
598 fp
->_flags
|= _IO_EOF_SEEN
;
600 fp
->_flags
|= _IO_ERR_SEEN
, count
= 0;
602 fp
->_IO_read_end
+= count
;
605 if (fp
->_offset
!= _IO_pos_BAD
)
606 _IO_pos_adjust (fp
->_offset
, count
);
607 return *(unsigned char *) fp
->_IO_read_ptr
;
609 INTDEF2(_IO_new_file_underflow
, _IO_file_underflow
)
611 /* Guts of underflow callback if we mmap the file. This stats the file and
612 updates the stream state to match. In the normal case we return zero.
613 If the file is no longer eligible for mmap, its jump tables are reset to
614 the vanilla ones and we return nonzero. */
616 mmap_remap_check (_IO_FILE
*fp
)
620 if (_IO_SYSSTAT (fp
, &st
) == 0
621 && S_ISREG (st
.st_mode
) && st
.st_size
!= 0
622 /* Limit the file size to 1MB for 32-bit machines. */
623 && (sizeof (ptrdiff_t) > 4 || st
.st_size
< 1*1024*1024))
625 const size_t pagesize
= __getpagesize ();
626 # define ROUNDED(x) (((x) + pagesize - 1) & ~(pagesize - 1))
627 if (ROUNDED (st
.st_size
) < ROUNDED (fp
->_IO_buf_end
630 /* We can trim off some pages past the end of the file. */
631 (void) __munmap (fp
->_IO_buf_base
+ ROUNDED (st
.st_size
),
632 ROUNDED (fp
->_IO_buf_end
- fp
->_IO_buf_base
)
633 - ROUNDED (st
.st_size
));
634 fp
->_IO_buf_end
= fp
->_IO_buf_base
+ st
.st_size
;
636 else if (ROUNDED (st
.st_size
) > ROUNDED (fp
->_IO_buf_end
639 /* The file added some pages. We need to remap it. */
641 #if defined __linux__ /* XXX */
642 p
= __mremap (fp
->_IO_buf_base
, ROUNDED (fp
->_IO_buf_end
644 ROUNDED (st
.st_size
), MREMAP_MAYMOVE
);
647 (void) __munmap (fp
->_IO_buf_base
,
648 fp
->_IO_buf_end
- fp
->_IO_buf_base
);
652 (void) __munmap (fp
->_IO_buf_base
,
653 fp
->_IO_buf_end
- fp
->_IO_buf_base
);
655 p
= _G_MMAP64 (NULL
, st
.st_size
, PROT_READ
, MAP_SHARED
,
658 p
= __mmap (NULL
, st
.st_size
, PROT_READ
, MAP_SHARED
,
664 fp
->_IO_buf_base
= p
;
665 fp
->_IO_buf_end
= fp
->_IO_buf_base
+ st
.st_size
;
669 /* The number of pages didn't change. */
670 fp
->_IO_buf_end
= fp
->_IO_buf_base
+ st
.st_size
;
674 fp
->_offset
-= fp
->_IO_read_end
- fp
->_IO_read_ptr
;
675 _IO_setg (fp
, fp
->_IO_buf_base
,
676 fp
->_offset
< fp
->_IO_buf_end
- fp
->_IO_buf_base
677 ? fp
->_IO_buf_base
+ fp
->_offset
: fp
->_IO_buf_end
,
680 /* If we are already positioned at or past the end of the file, don't
681 change the current offset. If not, seek past what we have mapped,
682 mimicking the position left by a normal underflow reading into its
685 if (fp
->_offset
< fp
->_IO_buf_end
- fp
->_IO_buf_base
)
693 (fp
->_fileno
, fp
->_IO_buf_end
- fp
->_IO_buf_base
, SEEK_SET
)
694 != fp
->_IO_buf_end
- fp
->_IO_buf_base
)
695 fp
->_flags
|= _IO_ERR_SEEN
;
697 fp
->_offset
= fp
->_IO_buf_end
- fp
->_IO_buf_base
;
704 /* Life is no longer good for mmap. Punt it. */
705 (void) __munmap (fp
->_IO_buf_base
,
706 fp
->_IO_buf_end
- fp
->_IO_buf_base
);
708 fp
->_IO_buf_base
= fp
->_IO_buf_end
= NULL
;
709 _IO_setg (fp
, NULL
, NULL
, NULL
);
711 _IO_JUMPS ((struct _IO_FILE_plus
*) fp
) = &INTUSE(_IO_file_jumps
);
713 _IO_JUMPS ((struct _IO_FILE_plus
*) fp
) = &_IO_wfile_jumps
;
714 fp
->_wide_data
->_wide_vtable
= &_IO_wfile_jumps
;
720 /* Special callback replacing the underflow callbacks if we mmap the file. */
722 _IO_file_underflow_mmap (_IO_FILE
*fp
)
724 if (fp
->_IO_read_ptr
< fp
->_IO_read_end
)
725 return *(unsigned char *) fp
->_IO_read_ptr
;
727 if (__builtin_expect (mmap_remap_check (fp
), 0))
728 /* We punted to the regular file functions. */
729 return _IO_UNDERFLOW (fp
);
731 if (fp
->_IO_read_ptr
< fp
->_IO_read_end
)
732 return *(unsigned char *) fp
->_IO_read_ptr
;
734 fp
->_flags
|= _IO_EOF_SEEN
;
739 decide_maybe_mmap (_IO_FILE
*fp
)
741 /* We use the file in read-only mode. This could mean we can
742 mmap the file and use it without any copying. But not all
743 file descriptors are for mmap-able objects and on 32-bit
744 machines we don't want to map files which are too large since
745 this would require too much virtual memory. */
748 if (_IO_SYSSTAT (fp
, &st
) == 0
749 && S_ISREG (st
.st_mode
) && st
.st_size
!= 0
750 /* Limit the file size to 1MB for 32-bit machines. */
751 && (sizeof (ptrdiff_t) > 4 || st
.st_size
< 1*1024*1024)
753 && (fp
->_offset
== _IO_pos_BAD
|| fp
->_offset
<= st
.st_size
))
755 /* Try to map the file. */
759 p
= _G_MMAP64 (NULL
, st
.st_size
, PROT_READ
, MAP_SHARED
, fp
->_fileno
, 0);
761 p
= __mmap (NULL
, st
.st_size
, PROT_READ
, MAP_SHARED
, fp
->_fileno
, 0);
765 /* OK, we managed to map the file. Set the buffer up and use a
766 special jump table with simplified underflow functions which
767 never tries to read anything from the file. */
775 (fp
->_fileno
, st
.st_size
, SEEK_SET
) != st
.st_size
)
777 (void) __munmap (p
, st
.st_size
);
778 fp
->_offset
= _IO_pos_BAD
;
782 INTUSE(_IO_setb
) (fp
, p
, (char *) p
+ st
.st_size
, 0);
784 if (fp
->_offset
== _IO_pos_BAD
)
787 _IO_setg (fp
, p
, p
+ fp
->_offset
, p
+ st
.st_size
);
788 fp
->_offset
= st
.st_size
;
791 _IO_JUMPS ((struct _IO_FILE_plus
*)fp
) = &_IO_file_jumps_mmap
;
793 _IO_JUMPS ((struct _IO_FILE_plus
*)fp
) = &_IO_wfile_jumps_mmap
;
794 fp
->_wide_data
->_wide_vtable
= &_IO_wfile_jumps_mmap
;
801 /* We couldn't use mmap, so revert to the vanilla file operations. */
804 _IO_JUMPS ((struct _IO_FILE_plus
*) fp
) = &INTUSE(_IO_file_jumps
);
806 _IO_JUMPS ((struct _IO_FILE_plus
*) fp
) = &_IO_wfile_jumps
;
807 fp
->_wide_data
->_wide_vtable
= &_IO_wfile_jumps
;
811 _IO_file_underflow_maybe_mmap (_IO_FILE
*fp
)
813 /* This is the first read attempt. Choose mmap or vanilla operations
814 and then punt to the chosen underflow routine. */
815 decide_maybe_mmap (fp
);
816 return _IO_UNDERFLOW (fp
);
821 _IO_new_file_overflow (f
, ch
)
825 if (f
->_flags
& _IO_NO_WRITES
) /* SET ERROR */
827 f
->_flags
|= _IO_ERR_SEEN
;
831 /* If currently reading or no buffer allocated. */
832 if ((f
->_flags
& _IO_CURRENTLY_PUTTING
) == 0 || f
->_IO_write_base
== 0)
834 /* Allocate a buffer if needed. */
835 if (f
->_IO_write_base
== 0)
837 INTUSE(_IO_doallocbuf
) (f
);
838 _IO_setg (f
, f
->_IO_buf_base
, f
->_IO_buf_base
, f
->_IO_buf_base
);
840 /* Otherwise must be currently reading.
841 If _IO_read_ptr (and hence also _IO_read_end) is at the buffer end,
842 logically slide the buffer forwards one block (by setting the
843 read pointers to all point at the beginning of the block). This
844 makes room for subsequent output.
845 Otherwise, set the read pointers to _IO_read_end (leaving that
846 alone, so it can continue to correspond to the external position). */
847 if (f
->_IO_read_ptr
== f
->_IO_buf_end
)
848 f
->_IO_read_end
= f
->_IO_read_ptr
= f
->_IO_buf_base
;
849 f
->_IO_write_ptr
= f
->_IO_read_ptr
;
850 f
->_IO_write_base
= f
->_IO_write_ptr
;
851 f
->_IO_write_end
= f
->_IO_buf_end
;
852 f
->_IO_read_base
= f
->_IO_read_ptr
= f
->_IO_read_end
;
854 f
->_flags
|= _IO_CURRENTLY_PUTTING
;
855 if (f
->_mode
<= 0 && f
->_flags
& (_IO_LINE_BUF
+_IO_UNBUFFERED
))
856 f
->_IO_write_end
= f
->_IO_write_ptr
;
859 return INTUSE(_IO_do_write
) (f
, f
->_IO_write_base
,
860 f
->_IO_write_ptr
- f
->_IO_write_base
);
861 if (f
->_IO_write_ptr
== f
->_IO_buf_end
) /* Buffer is really full */
862 if (_IO_do_flush (f
) == EOF
)
864 *f
->_IO_write_ptr
++ = ch
;
865 if ((f
->_flags
& _IO_UNBUFFERED
)
866 || ((f
->_flags
& _IO_LINE_BUF
) && ch
== '\n'))
867 if (INTUSE(_IO_do_write
) (f
, f
->_IO_write_base
,
868 f
->_IO_write_ptr
- f
->_IO_write_base
) == EOF
)
870 return (unsigned char) ch
;
872 INTDEF2(_IO_new_file_overflow
, _IO_file_overflow
)
875 _IO_new_file_sync (fp
)
881 /* char* ptr = cur_ptr(); */
882 if (fp
->_IO_write_ptr
> fp
->_IO_write_base
)
883 if (_IO_do_flush(fp
)) return EOF
;
884 delta
= fp
->_IO_read_ptr
- fp
->_IO_read_end
;
888 if (_IO_in_backup (fp
))
889 delta
-= eGptr () - Gbase ();
891 _IO_off64_t new_pos
= _IO_SYSSEEK (fp
, delta
, 1);
892 if (new_pos
!= (_IO_off64_t
) EOF
)
893 fp
->_IO_read_end
= fp
->_IO_read_ptr
;
895 else if (errno
== ESPIPE
)
896 ; /* Ignore error from unseekable devices. */
902 fp
->_offset
= _IO_pos_BAD
;
903 /* FIXME: Cleanup - can this be shared? */
904 /* setg(base(), ptr, ptr); */
907 INTDEF2(_IO_new_file_sync
, _IO_file_sync
)
910 _IO_file_sync_mmap (_IO_FILE
*fp
)
912 if (fp
->_IO_read_ptr
!= fp
->_IO_read_end
)
915 if (_IO_in_backup (fp
))
916 delta
-= eGptr () - Gbase ();
924 (fp
->_fileno
, fp
->_IO_read_ptr
- fp
->_IO_buf_base
, SEEK_SET
)
925 != fp
->_IO_read_ptr
- fp
->_IO_buf_base
)
927 fp
->_flags
|= _IO_ERR_SEEN
;
931 fp
->_offset
= fp
->_IO_read_ptr
- fp
->_IO_buf_base
;
932 fp
->_IO_read_end
= fp
->_IO_read_ptr
= fp
->_IO_read_base
;
938 _IO_new_file_seekoff (fp
, offset
, dir
, mode
)
945 _IO_off64_t delta
, new_offset
;
947 /* POSIX.1 8.2.3.7 says that after a call the fflush() the file
948 offset of the underlying file must be exact. */
949 int must_be_exact
= (fp
->_IO_read_base
== fp
->_IO_read_end
950 && fp
->_IO_write_base
== fp
->_IO_write_ptr
);
953 dir
= _IO_seek_cur
, offset
= 0; /* Don't move any pointers. */
955 /* Flush unwritten characters.
956 (This may do an unneeded write if we seek within the buffer.
957 But to be able to switch to reading, we would need to set
958 egptr to ptr. That can't be done in the current design,
959 which assumes file_ptr() is eGptr. Anyway, since we probably
960 end up flushing when we close(), it doesn't make much difference.)
961 FIXME: simulate mem-papped files. */
963 if (fp
->_IO_write_ptr
> fp
->_IO_write_base
|| _IO_in_put_mode (fp
))
964 if (INTUSE(_IO_switch_to_get_mode
) (fp
))
967 if (fp
->_IO_buf_base
== NULL
)
969 /* It could be that we already have a pushback buffer. */
970 if (fp
->_IO_read_base
!= NULL
)
972 free (fp
->_IO_read_base
);
973 fp
->_flags
&= ~_IO_IN_BACKUP
;
975 INTUSE(_IO_doallocbuf
) (fp
);
976 _IO_setp (fp
, fp
->_IO_buf_base
, fp
->_IO_buf_base
);
977 _IO_setg (fp
, fp
->_IO_buf_base
, fp
->_IO_buf_base
, fp
->_IO_buf_base
);
983 /* Adjust for read-ahead (bytes is buffer). */
984 offset
-= fp
->_IO_read_end
- fp
->_IO_read_ptr
;
985 if (fp
->_offset
== _IO_pos_BAD
)
987 /* Make offset absolute, assuming current pointer is file_ptr(). */
988 offset
+= fp
->_offset
;
991 __set_errno (EINVAL
);
1001 struct _G_stat64 st
;
1002 if (_IO_SYSSTAT (fp
, &st
) == 0 && S_ISREG (st
.st_mode
))
1004 offset
+= st
.st_size
;
1011 /* At this point, dir==_IO_seek_set. */
1013 /* If we are only interested in the current position we've found it now. */
1017 /* If destination is within current buffer, optimize: */
1018 if (fp
->_offset
!= _IO_pos_BAD
&& fp
->_IO_read_base
!= NULL
1019 && !_IO_in_backup (fp
))
1021 /* Offset relative to start of main get area. */
1022 _IO_off64_t rel_offset
= (offset
- fp
->_offset
1023 + (fp
->_IO_read_end
- fp
->_IO_read_base
));
1024 if (rel_offset
>= 0)
1027 if (_IO_in_backup (fp
))
1028 _IO_switch_to_main_get_area (fp
);
1030 if (rel_offset
<= fp
->_IO_read_end
- fp
->_IO_read_base
)
1032 _IO_setg (fp
, fp
->_IO_buf_base
, fp
->_IO_buf_base
+ rel_offset
,
1034 _IO_setp (fp
, fp
->_IO_buf_base
, fp
->_IO_buf_base
);
1036 _IO_mask_flags (fp
, 0, _IO_EOF_SEEN
);
1041 /* If we have streammarkers, seek forward by reading ahead. */
1042 if (_IO_have_markers (fp
))
1044 int to_skip
= rel_offset
1045 - (fp
->_IO_read_ptr
- fp
->_IO_read_base
);
1046 if (ignore (to_skip
) != to_skip
)
1048 _IO_mask_flags (fp
, 0, _IO_EOF_SEEN
);
1054 if (rel_offset
< 0 && rel_offset
>= Bbase () - Bptr ())
1056 if (!_IO_in_backup (fp
))
1057 _IO_switch_to_backup_area (fp
);
1058 gbump (fp
->_IO_read_end
+ rel_offset
- fp
->_IO_read_ptr
);
1059 _IO_mask_flags (fp
, 0, _IO_EOF_SEEN
);
1066 INTUSE(_IO_unsave_markers
) (fp
);
1069 if (fp
->_flags
& _IO_NO_READS
)
1072 /* Try to seek to a block boundary, to improve kernel page management. */
1073 new_offset
= offset
& ~(fp
->_IO_buf_end
- fp
->_IO_buf_base
- 1);
1074 delta
= offset
- new_offset
;
1075 if (delta
> fp
->_IO_buf_end
- fp
->_IO_buf_base
)
1077 new_offset
= offset
;
1080 result
= _IO_SYSSEEK (fp
, new_offset
, 0);
1087 count
= _IO_SYSREAD (fp
, fp
->_IO_buf_base
,
1089 ? delta
: fp
->_IO_buf_end
- fp
->_IO_buf_base
));
1092 /* We weren't allowed to read, but try to seek the remainder. */
1093 offset
= count
== EOF
? delta
: delta
-count
;
1098 _IO_setg (fp
, fp
->_IO_buf_base
, fp
->_IO_buf_base
+ delta
,
1099 fp
->_IO_buf_base
+ count
);
1100 _IO_setp (fp
, fp
->_IO_buf_base
, fp
->_IO_buf_base
);
1101 fp
->_offset
= result
+ count
;
1102 _IO_mask_flags (fp
, 0, _IO_EOF_SEEN
);
1106 INTUSE(_IO_unsave_markers
) (fp
);
1107 result
= _IO_SYSSEEK (fp
, offset
, dir
);
1110 _IO_mask_flags (fp
, 0, _IO_EOF_SEEN
);
1111 fp
->_offset
= result
;
1112 _IO_setg (fp
, fp
->_IO_buf_base
, fp
->_IO_buf_base
, fp
->_IO_buf_base
);
1113 _IO_setp (fp
, fp
->_IO_buf_base
, fp
->_IO_buf_base
);
1118 /* We need to do it since it is possible that the file offset in
1119 the kernel may be changed behind our back. It may happen when
1120 we fopen a file and then do a fork. One process may access the
1121 the file and the kernel file offset will be changed. */
1122 if (fp
->_offset
>= 0)
1123 _IO_SYSSEEK (fp
, fp
->_offset
, 0);
1127 INTDEF2(_IO_new_file_seekoff
, _IO_file_seekoff
)
1130 _IO_file_seekoff_mmap (fp
, offset
, dir
, mode
)
1138 /* If we are only interested in the current position, calculate it and
1139 return right now. This calculation does the right thing when we are
1140 using a pushback buffer, but in the usual case has the same value as
1141 (fp->_IO_read_ptr - fp->_IO_buf_base). */
1143 return fp
->_offset
- (fp
->_IO_read_end
- fp
->_IO_read_ptr
);
1148 /* Adjust for read-ahead (bytes is buffer). */
1149 offset
+= fp
->_IO_read_ptr
- fp
->_IO_read_base
;
1154 offset
+= fp
->_IO_buf_end
- fp
->_IO_buf_base
;
1157 /* At this point, dir==_IO_seek_set. */
1161 /* No negative offsets are valid. */
1162 __set_errno (EINVAL
);
1166 result
= _IO_SYSSEEK (fp
, offset
, 0);
1170 if (offset
> fp
->_IO_buf_end
- fp
->_IO_buf_base
)
1171 /* One can fseek arbitrarily past the end of the file
1172 and it is meaningless until one attempts to read.
1173 Leave the buffer pointers in EOF state until underflow. */
1174 _IO_setg (fp
, fp
->_IO_buf_base
, fp
->_IO_buf_end
, fp
->_IO_buf_end
);
1176 /* Adjust the read pointers to match the file position,
1177 but so the next read attempt will call underflow. */
1178 _IO_setg (fp
, fp
->_IO_buf_base
, fp
->_IO_buf_base
+ offset
,
1179 fp
->_IO_buf_base
+ offset
);
1181 fp
->_offset
= result
;
1183 _IO_mask_flags (fp
, 0, _IO_EOF_SEEN
);
1189 _IO_file_seekoff_maybe_mmap (_IO_FILE
*fp
, _IO_off64_t offset
, int dir
,
1192 /* We only get here when we haven't tried to read anything yet.
1193 So there is nothing more useful for us to do here than just
1194 the underlying lseek call. */
1196 _IO_off64_t result
= _IO_SYSSEEK (fp
, offset
, dir
);
1200 fp
->_offset
= result
;
1205 _IO_file_read (fp
, buf
, size
)
1210 return read (fp
->_fileno
, buf
, size
);
1212 INTDEF(_IO_file_read
)
1215 _IO_file_seek (fp
, offset
, dir
)
1221 return _G_LSEEK64 (fp
->_fileno
, offset
, dir
);
1223 return lseek (fp
->_fileno
, offset
, dir
);
1226 INTDEF(_IO_file_seek
)
1229 _IO_file_stat (fp
, st
)
1234 return _G_FSTAT64 (fp
->_fileno
, (struct _G_stat64
*) st
);
1236 return fstat (fp
->_fileno
, (struct stat
*) st
);
1239 INTDEF(_IO_file_stat
)
1242 _IO_file_close_mmap (fp
)
1245 /* In addition to closing the file descriptor we have to unmap the file. */
1246 (void) __munmap (fp
->_IO_buf_base
, fp
->_IO_buf_end
- fp
->_IO_buf_base
);
1247 fp
->_IO_buf_base
= fp
->_IO_buf_end
= NULL
;
1248 return close (fp
->_fileno
);
1255 return close (fp
->_fileno
);
1257 INTDEF(_IO_file_close
)
1260 _IO_new_file_write (f
, data
, n
)
1265 _IO_ssize_t to_do
= n
;
1268 _IO_ssize_t count
= write (f
->_fileno
, data
, to_do
);
1271 f
->_flags
|= _IO_ERR_SEEN
;
1275 data
= (void *) ((char *) data
+ count
);
1278 if (f
->_offset
>= 0)
1284 _IO_new_file_xsputn (f
, data
, n
)
1289 register const char *s
= (const char *) data
;
1290 _IO_size_t to_do
= n
;
1296 /* This is an optimized implementation.
1297 If the amount to be written straddles a block boundary
1298 (or the filebuf is unbuffered), use sys_write directly. */
1300 /* First figure out how much space is available in the buffer. */
1301 count
= f
->_IO_write_end
- f
->_IO_write_ptr
; /* Space available. */
1302 if ((f
->_flags
& _IO_LINE_BUF
) && (f
->_flags
& _IO_CURRENTLY_PUTTING
))
1304 count
= f
->_IO_buf_end
- f
->_IO_write_ptr
;
1307 register const char *p
;
1308 for (p
= s
+ n
; p
> s
; )
1319 /* Then fill the buffer. */
1327 f
->_IO_write_ptr
= __mempcpy (f
->_IO_write_ptr
, s
, count
);
1329 memcpy (f
->_IO_write_ptr
, s
, count
);
1330 f
->_IO_write_ptr
+= count
;
1336 register char *p
= f
->_IO_write_ptr
;
1337 register int i
= (int) count
;
1340 f
->_IO_write_ptr
= p
;
1344 if (to_do
+ must_flush
> 0)
1346 _IO_size_t block_size
, do_write
;
1347 /* Next flush the (full) buffer. */
1348 if (_IO_OVERFLOW (f
, EOF
) == EOF
)
1351 /* Try to maintain alignment: write a whole number of blocks.
1352 dont_write is what gets left over. */
1353 block_size
= f
->_IO_buf_end
- f
->_IO_buf_base
;
1354 do_write
= to_do
- (block_size
>= 128 ? to_do
% block_size
: 0);
1358 count
= new_do_write (f
, s
, do_write
);
1360 if (count
< do_write
)
1364 /* Now write out the remainder. Normally, this will fit in the
1365 buffer, but it's somewhat messier for line-buffered files,
1366 so we let _IO_default_xsputn handle the general case. */
1368 to_do
-= INTUSE(_IO_default_xsputn
) (f
, s
+do_write
, to_do
);
1372 INTDEF2(_IO_new_file_xsputn
, _IO_file_xsputn
)
1375 _IO_file_xsgetn (fp
, data
, n
)
1380 register _IO_size_t want
, have
;
1381 register _IO_ssize_t count
;
1382 register char *s
= data
;
1386 if (fp
->_IO_buf_base
== NULL
)
1388 /* Maybe we already have a push back pointer. */
1389 if (fp
->_IO_save_base
!= NULL
)
1391 free (fp
->_IO_save_base
);
1392 fp
->_flags
&= ~_IO_IN_BACKUP
;
1394 INTUSE(_IO_doallocbuf
) (fp
);
1399 have
= fp
->_IO_read_end
- fp
->_IO_read_ptr
;
1402 memcpy (s
, fp
->_IO_read_ptr
, want
);
1403 fp
->_IO_read_ptr
+= want
;
1411 s
= __mempcpy (s
, fp
->_IO_read_ptr
, have
);
1413 memcpy (s
, fp
->_IO_read_ptr
, have
);
1417 fp
->_IO_read_ptr
+= have
;
1420 /* Check for backup and repeat */
1421 if (_IO_in_backup (fp
))
1423 _IO_switch_to_main_get_area (fp
);
1427 /* If we now want less than a buffer, underflow and repeat
1428 the copy. Otherwise, _IO_SYSREAD directly to
1430 if (fp
->_IO_buf_base
1431 && want
< (size_t) (fp
->_IO_buf_end
- fp
->_IO_buf_base
))
1433 if (__underflow (fp
) == EOF
)
1439 /* These must be set before the sysread as we might longjmp out
1440 waiting for input. */
1441 _IO_setg (fp
, fp
->_IO_buf_base
, fp
->_IO_buf_base
, fp
->_IO_buf_base
);
1442 _IO_setp (fp
, fp
->_IO_buf_base
, fp
->_IO_buf_base
);
1444 /* Try to maintain alignment: read a whole number of blocks. */
1446 if (fp
->_IO_buf_base
)
1448 _IO_size_t block_size
= fp
->_IO_buf_end
- fp
->_IO_buf_base
;
1449 if (block_size
>= 128)
1450 count
-= want
% block_size
;
1453 count
= _IO_SYSREAD (fp
, s
, count
);
1457 fp
->_flags
|= _IO_EOF_SEEN
;
1459 fp
->_flags
|= _IO_ERR_SEEN
;
1466 if (fp
->_offset
!= _IO_pos_BAD
)
1467 _IO_pos_adjust (fp
->_offset
, count
);
1473 INTDEF(_IO_file_xsgetn
)
1475 static _IO_size_t _IO_file_xsgetn_mmap
__P ((_IO_FILE
*, void *, _IO_size_t
));
1477 _IO_file_xsgetn_mmap (fp
, data
, n
)
1482 register _IO_size_t have
;
1483 char *read_ptr
= fp
->_IO_read_ptr
;
1484 register char *s
= (char *) data
;
1486 have
= fp
->_IO_read_end
- fp
->_IO_read_ptr
;
1490 if (__builtin_expect (_IO_in_backup (fp
), 0))
1493 s
= __mempcpy (s
, read_ptr
, have
);
1495 memcpy (s
, read_ptr
, have
);
1499 _IO_switch_to_main_get_area (fp
);
1500 read_ptr
= fp
->_IO_read_ptr
;
1501 have
= fp
->_IO_read_end
- fp
->_IO_read_ptr
;
1506 /* Check that we are mapping all of the file, in case it grew. */
1507 if (__builtin_expect (mmap_remap_check (fp
), 0))
1508 /* We punted mmap, so complete with the vanilla code. */
1509 return s
- (char *) data
+ _IO_XSGETN (fp
, data
, n
);
1511 read_ptr
= fp
->_IO_read_ptr
;
1512 have
= fp
->_IO_read_end
- read_ptr
;
1517 fp
->_flags
|= _IO_EOF_SEEN
;
1521 have
= MIN (have
, n
);
1523 s
= __mempcpy (s
, read_ptr
, have
);
1525 memcpy (s
, read_ptr
, have
);
1528 fp
->_IO_read_ptr
= read_ptr
+ have
;
1531 return s
- (char *) data
;
1534 static _IO_size_t _IO_file_xsgetn_maybe_mmap
__P ((_IO_FILE
*, void *,
1537 _IO_file_xsgetn_maybe_mmap (fp
, data
, n
)
1542 /* We only get here if this is the first attempt to read something.
1543 Decide which operations to use and then punt to the chosen one. */
1545 decide_maybe_mmap (fp
);
1546 return _IO_XSGETN (fp
, data
, n
);
1550 # undef _IO_do_write
1551 versioned_symbol (libc
, _IO_new_do_write
, _IO_do_write
, GLIBC_2_1
);
1552 versioned_symbol (libc
, _IO_new_file_attach
, _IO_file_attach
, GLIBC_2_1
);
1553 versioned_symbol (libc
, _IO_new_file_close_it
, _IO_file_close_it
, GLIBC_2_1
);
1554 versioned_symbol (libc
, _IO_new_file_finish
, _IO_file_finish
, GLIBC_2_1
);
1555 versioned_symbol (libc
, _IO_new_file_fopen
, _IO_file_fopen
, GLIBC_2_1
);
1556 versioned_symbol (libc
, _IO_new_file_init
, _IO_file_init
, GLIBC_2_1
);
1557 versioned_symbol (libc
, _IO_new_file_setbuf
, _IO_file_setbuf
, GLIBC_2_1
);
1558 versioned_symbol (libc
, _IO_new_file_sync
, _IO_file_sync
, GLIBC_2_1
);
1559 versioned_symbol (libc
, _IO_new_file_overflow
, _IO_file_overflow
, GLIBC_2_1
);
1560 versioned_symbol (libc
, _IO_new_file_seekoff
, _IO_file_seekoff
, GLIBC_2_1
);
1561 versioned_symbol (libc
, _IO_new_file_underflow
, _IO_file_underflow
, GLIBC_2_1
);
1562 versioned_symbol (libc
, _IO_new_file_write
, _IO_file_write
, GLIBC_2_1
);
1563 versioned_symbol (libc
, _IO_new_file_xsputn
, _IO_file_xsputn
, GLIBC_2_1
);
1566 struct _IO_jump_t _IO_file_jumps
=
1569 JUMP_INIT(finish
, INTUSE(_IO_file_finish
)),
1570 JUMP_INIT(overflow
, INTUSE(_IO_file_overflow
)),
1571 JUMP_INIT(underflow
, INTUSE(_IO_file_underflow
)),
1572 JUMP_INIT(uflow
, INTUSE(_IO_default_uflow
)),
1573 JUMP_INIT(pbackfail
, INTUSE(_IO_default_pbackfail
)),
1574 JUMP_INIT(xsputn
, INTUSE(_IO_file_xsputn
)),
1575 JUMP_INIT(xsgetn
, INTUSE(_IO_file_xsgetn
)),
1576 JUMP_INIT(seekoff
, _IO_new_file_seekoff
),
1577 JUMP_INIT(seekpos
, _IO_default_seekpos
),
1578 JUMP_INIT(setbuf
, _IO_new_file_setbuf
),
1579 JUMP_INIT(sync
, _IO_new_file_sync
),
1580 JUMP_INIT(doallocate
, INTUSE(_IO_file_doallocate
)),
1581 JUMP_INIT(read
, INTUSE(_IO_file_read
)),
1582 JUMP_INIT(write
, _IO_new_file_write
),
1583 JUMP_INIT(seek
, INTUSE(_IO_file_seek
)),
1584 JUMP_INIT(close
, INTUSE(_IO_file_close
)),
1585 JUMP_INIT(stat
, INTUSE(_IO_file_stat
)),
1586 JUMP_INIT(showmanyc
, _IO_default_showmanyc
),
1587 JUMP_INIT(imbue
, _IO_default_imbue
)
1589 INTVARDEF(_IO_file_jumps
)
1591 struct _IO_jump_t _IO_file_jumps_mmap
=
1594 JUMP_INIT(finish
, INTUSE(_IO_file_finish
)),
1595 JUMP_INIT(overflow
, INTUSE(_IO_file_overflow
)),
1596 JUMP_INIT(underflow
, _IO_file_underflow_mmap
),
1597 JUMP_INIT(uflow
, INTUSE(_IO_default_uflow
)),
1598 JUMP_INIT(pbackfail
, INTUSE(_IO_default_pbackfail
)),
1599 JUMP_INIT(xsputn
, _IO_new_file_xsputn
),
1600 JUMP_INIT(xsgetn
, _IO_file_xsgetn_mmap
),
1601 JUMP_INIT(seekoff
, _IO_file_seekoff_mmap
),
1602 JUMP_INIT(seekpos
, _IO_default_seekpos
),
1603 JUMP_INIT(setbuf
, (_IO_setbuf_t
) _IO_file_setbuf_mmap
),
1604 JUMP_INIT(sync
, _IO_file_sync_mmap
),
1605 JUMP_INIT(doallocate
, INTUSE(_IO_file_doallocate
)),
1606 JUMP_INIT(read
, INTUSE(_IO_file_read
)),
1607 JUMP_INIT(write
, _IO_new_file_write
),
1608 JUMP_INIT(seek
, INTUSE(_IO_file_seek
)),
1609 JUMP_INIT(close
, _IO_file_close_mmap
),
1610 JUMP_INIT(stat
, INTUSE(_IO_file_stat
)),
1611 JUMP_INIT(showmanyc
, _IO_default_showmanyc
),
1612 JUMP_INIT(imbue
, _IO_default_imbue
)
1615 struct _IO_jump_t _IO_file_jumps_maybe_mmap
=
1618 JUMP_INIT(finish
, INTUSE(_IO_file_finish
)),
1619 JUMP_INIT(overflow
, INTUSE(_IO_file_overflow
)),
1620 JUMP_INIT(underflow
, _IO_file_underflow_maybe_mmap
),
1621 JUMP_INIT(uflow
, INTUSE(_IO_default_uflow
)),
1622 JUMP_INIT(pbackfail
, INTUSE(_IO_default_pbackfail
)),
1623 JUMP_INIT(xsputn
, _IO_new_file_xsputn
),
1624 JUMP_INIT(xsgetn
, _IO_file_xsgetn_maybe_mmap
),
1625 JUMP_INIT(seekoff
, _IO_file_seekoff_maybe_mmap
),
1626 JUMP_INIT(seekpos
, _IO_default_seekpos
),
1627 JUMP_INIT(setbuf
, (_IO_setbuf_t
) _IO_file_setbuf_mmap
),
1628 JUMP_INIT(sync
, _IO_new_file_sync
),
1629 JUMP_INIT(doallocate
, INTUSE(_IO_file_doallocate
)),
1630 JUMP_INIT(read
, INTUSE(_IO_file_read
)),
1631 JUMP_INIT(write
, _IO_new_file_write
),
1632 JUMP_INIT(seek
, INTUSE(_IO_file_seek
)),
1633 JUMP_INIT(close
, _IO_file_close
),
1634 JUMP_INIT(stat
, INTUSE(_IO_file_stat
)),
1635 JUMP_INIT(showmanyc
, _IO_default_showmanyc
),
1636 JUMP_INIT(imbue
, _IO_default_imbue
)