1 /* Copyright (C) 1993, 1995, 1997-2001, 2002 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
);
253 _IO_new_file_fopen (fp
, filename
, mode
, is32not64
)
255 const char *filename
;
259 int oflags
= 0, omode
;
266 const char *last_recognized
;
269 if (_IO_file_is_open (fp
))
275 read_write
= _IO_NO_WRITES
;
279 oflags
= O_CREAT
|O_TRUNC
;
280 read_write
= _IO_NO_READS
;
284 oflags
= O_CREAT
|O_APPEND
;
285 read_write
= _IO_NO_READS
|_IO_IS_APPENDING
;
288 __set_errno (EINVAL
);
292 last_recognized
= mode
;
294 for (i
= 1; i
< 5; ++i
)
302 read_write
&= _IO_IS_APPENDING
;
304 last_recognized
= mode
;
310 last_recognized
= mode
;
315 last_recognized
= mode
;
319 fp
->_flags2
|= _IO_FLAGS2_MMAP
;
328 result
= _IO_file_open (fp
, filename
, omode
|oflags
, oprot
, read_write
,
335 /* Test whether the mode string specifies the conversion. */
336 cs
= strstr (last_recognized
+ 1, ",ccs=");
339 /* Yep. Load the appropriate conversions and set the orientation
341 struct gconv_fcts fcts
;
342 struct _IO_codecvt
*cc
;
343 char *endp
= __strchrnul (cs
+ 5, ',');
344 char ccs
[endp
- (cs
+ 5) + 3];
346 *((char *) __mempcpy (ccs
, cs
+ 5, endp
- (cs
+ 5))) = '\0';
349 if (__wcsmbs_named_conv (&fcts
, ccs
[2] == '\0'
350 ? upstr (ccs
, cs
+ 5) : ccs
) != 0)
352 /* Something went wrong, we cannot load the conversion modules.
353 This means we cannot proceed since the user explicitly asked
355 __set_errno (EINVAL
);
359 assert (fcts
.towc_nsteps
== 1);
360 assert (fcts
.tomb_nsteps
== 1);
362 fp
->_wide_data
->_IO_read_ptr
= fp
->_wide_data
->_IO_read_end
;
363 fp
->_wide_data
->_IO_write_ptr
= fp
->_wide_data
->_IO_write_base
;
365 /* Clear the state. We start all over again. */
366 memset (&fp
->_wide_data
->_IO_state
, '\0', sizeof (__mbstate_t
));
367 memset (&fp
->_wide_data
->_IO_last_state
, '\0', sizeof (__mbstate_t
));
369 cc
= fp
->_codecvt
= &fp
->_wide_data
->_codecvt
;
371 /* The functions are always the same. */
372 *cc
= __libio_codecvt
;
374 cc
->__cd_in
.__cd
.__nsteps
= fcts
.towc_nsteps
;
375 cc
->__cd_in
.__cd
.__steps
= fcts
.towc
;
377 cc
->__cd_in
.__cd
.__data
[0].__invocation_counter
= 0;
378 cc
->__cd_in
.__cd
.__data
[0].__internal_use
= 1;
379 cc
->__cd_in
.__cd
.__data
[0].__flags
= __GCONV_IS_LAST
;
380 cc
->__cd_in
.__cd
.__data
[0].__statep
= &result
->_wide_data
->_IO_state
;
382 /* XXX For now no transliteration. */
383 cc
->__cd_in
.__cd
.__data
[0].__trans
= NULL
;
385 cc
->__cd_out
.__cd
.__nsteps
= fcts
.tomb_nsteps
;
386 cc
->__cd_out
.__cd
.__steps
= fcts
.tomb
;
388 cc
->__cd_out
.__cd
.__data
[0].__invocation_counter
= 0;
389 cc
->__cd_out
.__cd
.__data
[0].__internal_use
= 1;
390 cc
->__cd_out
.__cd
.__data
[0].__flags
= __GCONV_IS_LAST
;
391 cc
->__cd_out
.__cd
.__data
[0].__statep
=
392 &result
->_wide_data
->_IO_state
;
394 /* And now the transliteration. */
395 cc
->__cd_out
.__cd
.__data
[0].__trans
= &__libio_translit
;
397 /* Set the mode now. */
400 /* We don't need the step data structure anymore. */
401 __gconv_release_cache (fcts
.towc
, fcts
.towc_nsteps
);
402 __gconv_release_cache (fcts
.tomb
, fcts
.tomb_nsteps
);
405 #endif /* GNU libc */
409 INTDEF2(_IO_new_file_fopen
, _IO_file_fopen
)
412 _IO_new_file_attach (fp
, fd
)
416 if (_IO_file_is_open (fp
))
419 fp
->_flags
&= ~(_IO_NO_READS
+_IO_NO_WRITES
);
420 fp
->_flags
|= _IO_DELETE_DONT_CLOSE
;
421 /* Get the current position of the file. */
422 /* We have to do that since that may be junk. */
423 fp
->_offset
= _IO_pos_BAD
;
424 if (_IO_SEEKOFF (fp
, (_IO_off64_t
)0, _IO_seek_cur
, _IOS_INPUT
|_IOS_OUTPUT
)
425 == _IO_pos_BAD
&& errno
!= ESPIPE
)
429 INTDEF2(_IO_new_file_attach
, _IO_file_attach
)
432 _IO_new_file_setbuf (fp
, p
, len
)
437 if (_IO_default_setbuf (fp
, p
, len
) == NULL
)
440 fp
->_IO_write_base
= fp
->_IO_write_ptr
= fp
->_IO_write_end
442 _IO_setg (fp
, fp
->_IO_buf_base
, fp
->_IO_buf_base
, fp
->_IO_buf_base
);
446 INTDEF2(_IO_new_file_setbuf
, _IO_file_setbuf
)
450 _IO_file_setbuf_mmap (fp
, p
, len
)
457 /* Change the function table. */
458 _IO_JUMPS ((struct _IO_FILE_plus
*) fp
) = &INTUSE(_IO_file_jumps
);
459 fp
->_wide_data
->_wide_vtable
= &_IO_wfile_jumps
;
461 /* And perform the normal operation. */
462 result
= _IO_new_file_setbuf (fp
, p
, len
);
464 /* If the call failed, restore to using mmap. */
467 _IO_JUMPS ((struct _IO_FILE_plus
*) fp
) = &_IO_file_jumps_mmap
;
468 fp
->_wide_data
->_wide_vtable
= &_IO_wfile_jumps_mmap
;
474 static int new_do_write
__P ((_IO_FILE
*, const char *, _IO_size_t
));
476 /* Write TO_DO bytes from DATA to FP.
477 Then mark FP as having empty buffers. */
480 _IO_new_do_write (fp
, data
, to_do
)
486 || (_IO_size_t
) new_do_write (fp
, data
, to_do
) == to_do
) ? 0 : EOF
;
488 INTDEF2(_IO_new_do_write
, _IO_do_write
)
492 new_do_write (fp
, data
, to_do
)
498 if (fp
->_flags
& _IO_IS_APPENDING
)
499 /* On a system without a proper O_APPEND implementation,
500 you would need to sys_seek(0, SEEK_END) here, but is
501 is not needed nor desirable for Unix- or Posix-like systems.
502 Instead, just indicate that offset (before and after) is
504 fp
->_offset
= _IO_pos_BAD
;
505 else if (fp
->_IO_read_end
!= fp
->_IO_write_base
)
508 = _IO_SYSSEEK (fp
, fp
->_IO_write_base
- fp
->_IO_read_end
, 1);
509 if (new_pos
== _IO_pos_BAD
)
511 fp
->_offset
= new_pos
;
513 count
= _IO_SYSWRITE (fp
, data
, to_do
);
514 if (fp
->_cur_column
&& count
)
515 fp
->_cur_column
= INTUSE(_IO_adjust_column
) (fp
->_cur_column
- 1, data
,
517 _IO_setg (fp
, fp
->_IO_buf_base
, fp
->_IO_buf_base
, fp
->_IO_buf_base
);
518 fp
->_IO_write_base
= fp
->_IO_write_ptr
= fp
->_IO_buf_base
;
519 fp
->_IO_write_end
= (fp
->_mode
<= 0
520 && (fp
->_flags
& (_IO_LINE_BUF
+_IO_UNBUFFERED
))
521 ? fp
->_IO_buf_base
: fp
->_IO_buf_end
);
526 _IO_new_file_underflow (fp
)
531 /* SysV does not make this test; take it out for compatibility */
532 if (fp
->_flags
& _IO_EOF_SEEN
)
536 if (fp
->_flags
& _IO_NO_READS
)
538 fp
->_flags
|= _IO_ERR_SEEN
;
542 if (fp
->_IO_read_ptr
< fp
->_IO_read_end
)
543 return *(unsigned char *) fp
->_IO_read_ptr
;
545 if (fp
->_IO_buf_base
== NULL
)
547 /* Maybe we already have a push back pointer. */
548 if (fp
->_IO_save_base
!= NULL
)
550 free (fp
->_IO_save_base
);
551 fp
->_flags
&= ~_IO_IN_BACKUP
;
553 INTUSE(_IO_doallocbuf
) (fp
);
556 /* Flush all line buffered files before reading. */
557 /* FIXME This can/should be moved to genops ?? */
558 if (fp
->_flags
& (_IO_LINE_BUF
|_IO_UNBUFFERED
))
561 INTUSE(_IO_flush_all_linebuffered
) ();
563 /* We used to flush all line-buffered stream. This really isn't
564 required by any standard. My recollection is that
565 traditional Unix systems did this for stdout. stderr better
566 not be line buffered. So we do just that here
567 explicitly. --drepper */
568 _IO_cleanup_region_start ((void (*) __P ((void *))) _IO_funlockfile
,
570 _IO_flockfile (_IO_stdout
);
572 if ((_IO_stdout
->_flags
& (_IO_LINKED
| _IO_NO_WRITES
| _IO_LINE_BUF
))
573 == (_IO_LINKED
| _IO_LINE_BUF
))
574 _IO_OVERFLOW (_IO_stdout
, EOF
);
576 _IO_funlockfile (_IO_stdout
);
577 _IO_cleanup_region_end (0);
581 INTUSE(_IO_switch_to_get_mode
) (fp
);
583 /* This is very tricky. We have to adjust those
584 pointers before we call _IO_SYSREAD () since
585 we may longjump () out while waiting for
586 input. Those pointers may be screwed up. H.J. */
587 fp
->_IO_read_base
= fp
->_IO_read_ptr
= fp
->_IO_buf_base
;
588 fp
->_IO_read_end
= fp
->_IO_buf_base
;
589 fp
->_IO_write_base
= fp
->_IO_write_ptr
= fp
->_IO_write_end
592 count
= _IO_SYSREAD (fp
, fp
->_IO_buf_base
,
593 fp
->_IO_buf_end
- fp
->_IO_buf_base
);
597 fp
->_flags
|= _IO_EOF_SEEN
;
599 fp
->_flags
|= _IO_ERR_SEEN
, count
= 0;
601 fp
->_IO_read_end
+= count
;
604 if (fp
->_offset
!= _IO_pos_BAD
)
605 _IO_pos_adjust (fp
->_offset
, count
);
606 return *(unsigned char *) fp
->_IO_read_ptr
;
608 INTDEF2(_IO_new_file_underflow
, _IO_file_underflow
)
610 /* Guts of underflow callback if we mmap the file. This stats the file and
611 updates the stream state to match. In the normal case we return zero.
612 If the file is no longer eligible for mmap, its jump tables are reset to
613 the vanilla ones and we return nonzero. */
615 mmap_remap_check (_IO_FILE
*fp
)
619 if (_IO_SYSSTAT (fp
, &st
) == 0
620 && S_ISREG (st
.st_mode
) && st
.st_size
!= 0
621 /* Limit the file size to 1MB for 32-bit machines. */
622 && (sizeof (ptrdiff_t) > 4 || st
.st_size
< 1*1024*1024))
624 const size_t pagesize
= __getpagesize ();
625 # define ROUNDED(x) (((x) + pagesize - 1) & ~(pagesize - 1))
626 if (ROUNDED (st
.st_size
) < ROUNDED (fp
->_IO_buf_end
629 /* We can trim off some pages past the end of the file. */
630 (void) __munmap (fp
->_IO_buf_base
+ ROUNDED (st
.st_size
),
631 ROUNDED (fp
->_IO_buf_end
- fp
->_IO_buf_base
)
632 - ROUNDED (st
.st_size
));
633 fp
->_IO_buf_end
= fp
->_IO_buf_base
+ st
.st_size
;
635 else if (ROUNDED (st
.st_size
) > ROUNDED (fp
->_IO_buf_end
638 /* The file added some pages. We need to remap it. */
640 #if defined __linux__ /* XXX */
641 p
= __mremap (fp
->_IO_buf_base
, ROUNDED (fp
->_IO_buf_end
643 ROUNDED (st
.st_size
), MREMAP_MAYMOVE
);
646 (void) __munmap (fp
->_IO_buf_base
,
647 fp
->_IO_buf_end
- fp
->_IO_buf_base
);
651 (void) __munmap (fp
->_IO_buf_base
,
652 fp
->_IO_buf_end
- fp
->_IO_buf_base
);
654 p
= _G_MMAP64 (NULL
, st
.st_size
, PROT_READ
, MAP_SHARED
,
657 p
= __mmap (NULL
, st
.st_size
, PROT_READ
, MAP_SHARED
,
663 fp
->_IO_buf_base
= p
;
664 fp
->_IO_buf_end
= fp
->_IO_buf_base
+ st
.st_size
;
668 /* The number of pages didn't change. */
669 fp
->_IO_buf_end
= fp
->_IO_buf_base
+ st
.st_size
;
673 fp
->_offset
-= fp
->_IO_read_end
- fp
->_IO_read_ptr
;
674 _IO_setg (fp
, fp
->_IO_buf_base
,
675 fp
->_offset
< fp
->_IO_buf_end
- fp
->_IO_buf_base
676 ? fp
->_IO_buf_base
+ fp
->_offset
: fp
->_IO_buf_end
,
679 /* If we are already positioned at or past the end of the file, don't
680 change the current offset. If not, seek past what we have mapped,
681 mimicking the position left by a normal underflow reading into its
684 if (fp
->_offset
< fp
->_IO_buf_end
- fp
->_IO_buf_base
)
692 (fp
->_fileno
, fp
->_IO_buf_end
- fp
->_IO_buf_base
, SEEK_SET
)
693 != fp
->_IO_buf_end
- fp
->_IO_buf_base
)
694 fp
->_flags
|= _IO_ERR_SEEN
;
696 fp
->_offset
= fp
->_IO_buf_end
- fp
->_IO_buf_base
;
703 /* Life is no longer good for mmap. Punt it. */
704 (void) __munmap (fp
->_IO_buf_base
,
705 fp
->_IO_buf_end
- fp
->_IO_buf_base
);
707 fp
->_IO_buf_base
= fp
->_IO_buf_end
= NULL
;
708 _IO_setg (fp
, NULL
, NULL
, NULL
);
710 _IO_JUMPS ((struct _IO_FILE_plus
*) fp
) = &INTUSE(_IO_file_jumps
);
712 _IO_JUMPS ((struct _IO_FILE_plus
*) fp
) = &_IO_wfile_jumps
;
713 fp
->_wide_data
->_wide_vtable
= &_IO_wfile_jumps
;
719 /* Special callback replacing the underflow callbacks if we mmap the file. */
721 _IO_file_underflow_mmap (_IO_FILE
*fp
)
723 if (fp
->_IO_read_ptr
< fp
->_IO_read_end
)
724 return *(unsigned char *) fp
->_IO_read_ptr
;
726 if (__builtin_expect (mmap_remap_check (fp
), 0))
727 /* We punted to the regular file functions. */
728 return _IO_UNDERFLOW (fp
);
730 if (fp
->_IO_read_ptr
< fp
->_IO_read_end
)
731 return *(unsigned char *) fp
->_IO_read_ptr
;
733 fp
->_flags
|= _IO_EOF_SEEN
;
738 decide_maybe_mmap (_IO_FILE
*fp
)
740 /* We use the file in read-only mode. This could mean we can
741 mmap the file and use it without any copying. But not all
742 file descriptors are for mmap-able objects and on 32-bit
743 machines we don't want to map files which are too large since
744 this would require too much virtual memory. */
747 if (_IO_SYSSTAT (fp
, &st
) == 0
748 && S_ISREG (st
.st_mode
) && st
.st_size
!= 0
749 /* Limit the file size to 1MB for 32-bit machines. */
750 && (sizeof (ptrdiff_t) > 4 || st
.st_size
< 1*1024*1024)
752 && (fp
->_offset
== _IO_pos_BAD
|| fp
->_offset
<= st
.st_size
))
754 /* Try to map the file. */
758 p
= _G_MMAP64 (NULL
, st
.st_size
, PROT_READ
, MAP_SHARED
, fp
->_fileno
, 0);
760 p
= __mmap (NULL
, st
.st_size
, PROT_READ
, MAP_SHARED
, fp
->_fileno
, 0);
764 /* OK, we managed to map the file. Set the buffer up and use a
765 special jump table with simplified underflow functions which
766 never tries to read anything from the file. */
774 (fp
->_fileno
, st
.st_size
, SEEK_SET
) != st
.st_size
)
776 (void) __munmap (p
, st
.st_size
);
777 fp
->_offset
= _IO_pos_BAD
;
781 INTUSE(_IO_setb
) (fp
, p
, (char *) p
+ st
.st_size
, 0);
783 if (fp
->_offset
== _IO_pos_BAD
)
786 _IO_setg (fp
, p
, p
+ fp
->_offset
, p
+ st
.st_size
);
787 fp
->_offset
= st
.st_size
;
790 _IO_JUMPS ((struct _IO_FILE_plus
*)fp
) = &_IO_file_jumps_mmap
;
792 _IO_JUMPS ((struct _IO_FILE_plus
*)fp
) = &_IO_wfile_jumps_mmap
;
793 fp
->_wide_data
->_wide_vtable
= &_IO_wfile_jumps_mmap
;
800 /* We couldn't use mmap, so revert to the vanilla file operations. */
803 _IO_JUMPS ((struct _IO_FILE_plus
*) fp
) = &INTUSE(_IO_file_jumps
);
805 _IO_JUMPS ((struct _IO_FILE_plus
*) fp
) = &_IO_wfile_jumps
;
806 fp
->_wide_data
->_wide_vtable
= &_IO_wfile_jumps
;
810 _IO_file_underflow_maybe_mmap (_IO_FILE
*fp
)
812 /* This is the first read attempt. Choose mmap or vanilla operations
813 and then punt to the chosen underflow routine. */
814 decide_maybe_mmap (fp
);
815 return _IO_UNDERFLOW (fp
);
820 _IO_new_file_overflow (f
, ch
)
824 if (f
->_flags
& _IO_NO_WRITES
) /* SET ERROR */
826 f
->_flags
|= _IO_ERR_SEEN
;
830 /* If currently reading or no buffer allocated. */
831 if ((f
->_flags
& _IO_CURRENTLY_PUTTING
) == 0 || f
->_IO_write_base
== 0)
833 /* Allocate a buffer if needed. */
834 if (f
->_IO_write_base
== 0)
836 INTUSE(_IO_doallocbuf
) (f
);
837 _IO_setg (f
, f
->_IO_buf_base
, f
->_IO_buf_base
, f
->_IO_buf_base
);
839 /* Otherwise must be currently reading.
840 If _IO_read_ptr (and hence also _IO_read_end) is at the buffer end,
841 logically slide the buffer forwards one block (by setting the
842 read pointers to all point at the beginning of the block). This
843 makes room for subsequent output.
844 Otherwise, set the read pointers to _IO_read_end (leaving that
845 alone, so it can continue to correspond to the external position). */
846 if (f
->_IO_read_ptr
== f
->_IO_buf_end
)
847 f
->_IO_read_end
= f
->_IO_read_ptr
= f
->_IO_buf_base
;
848 f
->_IO_write_ptr
= f
->_IO_read_ptr
;
849 f
->_IO_write_base
= f
->_IO_write_ptr
;
850 f
->_IO_write_end
= f
->_IO_buf_end
;
851 f
->_IO_read_base
= f
->_IO_read_ptr
= f
->_IO_read_end
;
853 f
->_flags
|= _IO_CURRENTLY_PUTTING
;
854 if (f
->_mode
<= 0 && f
->_flags
& (_IO_LINE_BUF
+_IO_UNBUFFERED
))
855 f
->_IO_write_end
= f
->_IO_write_ptr
;
858 return INTUSE(_IO_do_write
) (f
, f
->_IO_write_base
,
859 f
->_IO_write_ptr
- f
->_IO_write_base
);
860 if (f
->_IO_write_ptr
== f
->_IO_buf_end
) /* Buffer is really full */
861 if (_IO_do_flush (f
) == EOF
)
863 *f
->_IO_write_ptr
++ = ch
;
864 if ((f
->_flags
& _IO_UNBUFFERED
)
865 || ((f
->_flags
& _IO_LINE_BUF
) && ch
== '\n'))
866 if (INTUSE(_IO_do_write
) (f
, f
->_IO_write_base
,
867 f
->_IO_write_ptr
- f
->_IO_write_base
) == EOF
)
869 return (unsigned char) ch
;
871 INTDEF2(_IO_new_file_overflow
, _IO_file_overflow
)
874 _IO_new_file_sync (fp
)
880 /* char* ptr = cur_ptr(); */
881 if (fp
->_IO_write_ptr
> fp
->_IO_write_base
)
882 if (_IO_do_flush(fp
)) return EOF
;
883 delta
= fp
->_IO_read_ptr
- fp
->_IO_read_end
;
887 if (_IO_in_backup (fp
))
888 delta
-= eGptr () - Gbase ();
890 _IO_off64_t new_pos
= _IO_SYSSEEK (fp
, delta
, 1);
891 if (new_pos
!= (_IO_off64_t
) EOF
)
892 fp
->_IO_read_end
= fp
->_IO_read_ptr
;
894 else if (errno
== ESPIPE
)
895 ; /* Ignore error from unseekable devices. */
901 fp
->_offset
= _IO_pos_BAD
;
902 /* FIXME: Cleanup - can this be shared? */
903 /* setg(base(), ptr, ptr); */
906 INTDEF2(_IO_new_file_sync
, _IO_file_sync
)
909 _IO_file_sync_mmap (_IO_FILE
*fp
)
911 if (fp
->_IO_read_ptr
!= fp
->_IO_read_end
)
914 if (_IO_in_backup (fp
))
915 delta
-= eGptr () - Gbase ();
923 (fp
->_fileno
, fp
->_IO_read_ptr
- fp
->_IO_buf_base
, SEEK_SET
)
924 != fp
->_IO_read_ptr
- fp
->_IO_buf_base
)
926 fp
->_flags
|= _IO_ERR_SEEN
;
930 fp
->_offset
= fp
->_IO_read_ptr
- fp
->_IO_buf_base
;
931 fp
->_IO_read_end
= fp
->_IO_read_ptr
= fp
->_IO_read_base
;
937 _IO_new_file_seekoff (fp
, offset
, dir
, mode
)
944 _IO_off64_t delta
, new_offset
;
946 /* POSIX.1 8.2.3.7 says that after a call the fflush() the file
947 offset of the underlying file must be exact. */
948 int must_be_exact
= (fp
->_IO_read_base
== fp
->_IO_read_end
949 && fp
->_IO_write_base
== fp
->_IO_write_ptr
);
952 dir
= _IO_seek_cur
, offset
= 0; /* Don't move any pointers. */
954 /* Flush unwritten characters.
955 (This may do an unneeded write if we seek within the buffer.
956 But to be able to switch to reading, we would need to set
957 egptr to ptr. That can't be done in the current design,
958 which assumes file_ptr() is eGptr. Anyway, since we probably
959 end up flushing when we close(), it doesn't make much difference.)
960 FIXME: simulate mem-papped files. */
962 if (fp
->_IO_write_ptr
> fp
->_IO_write_base
|| _IO_in_put_mode (fp
))
963 if (INTUSE(_IO_switch_to_get_mode
) (fp
))
966 if (fp
->_IO_buf_base
== NULL
)
968 /* It could be that we already have a pushback buffer. */
969 if (fp
->_IO_read_base
!= NULL
)
971 free (fp
->_IO_read_base
);
972 fp
->_flags
&= ~_IO_IN_BACKUP
;
974 INTUSE(_IO_doallocbuf
) (fp
);
975 _IO_setp (fp
, fp
->_IO_buf_base
, fp
->_IO_buf_base
);
976 _IO_setg (fp
, fp
->_IO_buf_base
, fp
->_IO_buf_base
, fp
->_IO_buf_base
);
982 /* Adjust for read-ahead (bytes is buffer). */
983 offset
-= fp
->_IO_read_end
- fp
->_IO_read_ptr
;
984 if (fp
->_offset
== _IO_pos_BAD
)
986 /* Make offset absolute, assuming current pointer is file_ptr(). */
987 offset
+= fp
->_offset
;
990 __set_errno (EINVAL
);
1000 struct _G_stat64 st
;
1001 if (_IO_SYSSTAT (fp
, &st
) == 0 && S_ISREG (st
.st_mode
))
1003 offset
+= st
.st_size
;
1010 /* At this point, dir==_IO_seek_set. */
1012 /* If we are only interested in the current position we've found it now. */
1016 /* If destination is within current buffer, optimize: */
1017 if (fp
->_offset
!= _IO_pos_BAD
&& fp
->_IO_read_base
!= NULL
1018 && !_IO_in_backup (fp
))
1020 /* Offset relative to start of main get area. */
1021 _IO_off64_t rel_offset
= (offset
- fp
->_offset
1022 + (fp
->_IO_read_end
- fp
->_IO_read_base
));
1023 if (rel_offset
>= 0)
1026 if (_IO_in_backup (fp
))
1027 _IO_switch_to_main_get_area (fp
);
1029 if (rel_offset
<= fp
->_IO_read_end
- fp
->_IO_read_base
)
1031 _IO_setg (fp
, fp
->_IO_buf_base
, fp
->_IO_buf_base
+ rel_offset
,
1033 _IO_setp (fp
, fp
->_IO_buf_base
, fp
->_IO_buf_base
);
1035 _IO_mask_flags (fp
, 0, _IO_EOF_SEEN
);
1040 /* If we have streammarkers, seek forward by reading ahead. */
1041 if (_IO_have_markers (fp
))
1043 int to_skip
= rel_offset
1044 - (fp
->_IO_read_ptr
- fp
->_IO_read_base
);
1045 if (ignore (to_skip
) != to_skip
)
1047 _IO_mask_flags (fp
, 0, _IO_EOF_SEEN
);
1053 if (rel_offset
< 0 && rel_offset
>= Bbase () - Bptr ())
1055 if (!_IO_in_backup (fp
))
1056 _IO_switch_to_backup_area (fp
);
1057 gbump (fp
->_IO_read_end
+ rel_offset
- fp
->_IO_read_ptr
);
1058 _IO_mask_flags (fp
, 0, _IO_EOF_SEEN
);
1065 INTUSE(_IO_unsave_markers
) (fp
);
1068 if (fp
->_flags
& _IO_NO_READS
)
1071 /* Try to seek to a block boundary, to improve kernel page management. */
1072 new_offset
= offset
& ~(fp
->_IO_buf_end
- fp
->_IO_buf_base
- 1);
1073 delta
= offset
- new_offset
;
1074 if (delta
> fp
->_IO_buf_end
- fp
->_IO_buf_base
)
1076 new_offset
= offset
;
1079 result
= _IO_SYSSEEK (fp
, new_offset
, 0);
1086 count
= _IO_SYSREAD (fp
, fp
->_IO_buf_base
,
1088 ? delta
: fp
->_IO_buf_end
- fp
->_IO_buf_base
));
1091 /* We weren't allowed to read, but try to seek the remainder. */
1092 offset
= count
== EOF
? delta
: delta
-count
;
1097 _IO_setg (fp
, fp
->_IO_buf_base
, fp
->_IO_buf_base
+ delta
,
1098 fp
->_IO_buf_base
+ count
);
1099 _IO_setp (fp
, fp
->_IO_buf_base
, fp
->_IO_buf_base
);
1100 fp
->_offset
= result
+ count
;
1101 _IO_mask_flags (fp
, 0, _IO_EOF_SEEN
);
1105 INTUSE(_IO_unsave_markers
) (fp
);
1106 result
= _IO_SYSSEEK (fp
, offset
, dir
);
1109 _IO_mask_flags (fp
, 0, _IO_EOF_SEEN
);
1110 fp
->_offset
= result
;
1111 _IO_setg (fp
, fp
->_IO_buf_base
, fp
->_IO_buf_base
, fp
->_IO_buf_base
);
1112 _IO_setp (fp
, fp
->_IO_buf_base
, fp
->_IO_buf_base
);
1117 /* We need to do it since it is possible that the file offset in
1118 the kernel may be changed behind our back. It may happen when
1119 we fopen a file and then do a fork. One process may access the
1120 the file and the kernel file offset will be changed. */
1121 if (fp
->_offset
>= 0)
1122 _IO_SYSSEEK (fp
, fp
->_offset
, 0);
1126 INTDEF2(_IO_new_file_seekoff
, _IO_file_seekoff
)
1129 _IO_file_seekoff_mmap (fp
, offset
, dir
, mode
)
1137 /* If we are only interested in the current position, calculate it and
1138 return right now. This calculation does the right thing when we are
1139 using a pushback buffer, but in the usual case has the same value as
1140 (fp->_IO_read_ptr - fp->_IO_buf_base). */
1142 return fp
->_offset
- (fp
->_IO_read_end
- fp
->_IO_read_ptr
);
1147 /* Adjust for read-ahead (bytes is buffer). */
1148 offset
+= fp
->_IO_read_ptr
- fp
->_IO_read_base
;
1153 offset
+= fp
->_IO_buf_end
- fp
->_IO_buf_base
;
1156 /* At this point, dir==_IO_seek_set. */
1160 /* No negative offsets are valid. */
1161 __set_errno (EINVAL
);
1165 result
= _IO_SYSSEEK (fp
, offset
, 0);
1169 if (offset
> fp
->_IO_buf_end
- fp
->_IO_buf_base
)
1170 /* One can fseek arbitrarily past the end of the file
1171 and it is meaningless until one attempts to read.
1172 Leave the buffer pointers in EOF state until underflow. */
1173 _IO_setg (fp
, fp
->_IO_buf_base
, fp
->_IO_buf_end
, fp
->_IO_buf_end
);
1175 /* Adjust the read pointers to match the file position,
1176 but so the next read attempt will call underflow. */
1177 _IO_setg (fp
, fp
->_IO_buf_base
, fp
->_IO_buf_base
+ offset
,
1178 fp
->_IO_buf_base
+ offset
);
1180 fp
->_offset
= result
;
1182 _IO_mask_flags (fp
, 0, _IO_EOF_SEEN
);
1188 _IO_file_seekoff_maybe_mmap (fp
, offset
, dir
, mode
)
1194 /* We only get here when we haven't tried to read anything yet.
1195 So there is nothing more useful for us to do here than just
1196 the underlying lseek call. */
1198 _IO_off64_t result
= _IO_SYSSEEK (fp
, offset
, dir
);
1202 fp
->_offset
= result
;
1207 _IO_file_read (fp
, buf
, size
)
1212 return read (fp
->_fileno
, buf
, size
);
1214 INTDEF(_IO_file_read
)
1217 _IO_file_seek (fp
, offset
, dir
)
1223 return _G_LSEEK64 (fp
->_fileno
, offset
, dir
);
1225 return lseek (fp
->_fileno
, offset
, dir
);
1228 INTDEF(_IO_file_seek
)
1231 _IO_file_stat (fp
, st
)
1236 return _G_FSTAT64 (fp
->_fileno
, (struct _G_stat64
*) st
);
1238 return fstat (fp
->_fileno
, (struct stat
*) st
);
1241 INTDEF(_IO_file_stat
)
1244 _IO_file_close_mmap (fp
)
1247 /* In addition to closing the file descriptor we have to unmap the file. */
1248 (void) __munmap (fp
->_IO_buf_base
, fp
->_IO_buf_end
- fp
->_IO_buf_base
);
1249 fp
->_IO_buf_base
= fp
->_IO_buf_end
= NULL
;
1250 return close (fp
->_fileno
);
1257 return close (fp
->_fileno
);
1259 INTDEF(_IO_file_close
)
1262 _IO_new_file_write (f
, data
, n
)
1267 _IO_ssize_t to_do
= n
;
1270 _IO_ssize_t count
= write (f
->_fileno
, data
, to_do
);
1273 f
->_flags
|= _IO_ERR_SEEN
;
1277 data
= (void *) ((char *) data
+ count
);
1280 if (f
->_offset
>= 0)
1286 _IO_new_file_xsputn (f
, data
, n
)
1291 register const char *s
= (const char *) data
;
1292 _IO_size_t to_do
= n
;
1298 /* This is an optimized implementation.
1299 If the amount to be written straddles a block boundary
1300 (or the filebuf is unbuffered), use sys_write directly. */
1302 /* First figure out how much space is available in the buffer. */
1303 count
= f
->_IO_write_end
- f
->_IO_write_ptr
; /* Space available. */
1304 if ((f
->_flags
& _IO_LINE_BUF
) && (f
->_flags
& _IO_CURRENTLY_PUTTING
))
1306 count
= f
->_IO_buf_end
- f
->_IO_write_ptr
;
1309 register const char *p
;
1310 for (p
= s
+ n
; p
> s
; )
1321 /* Then fill the buffer. */
1329 f
->_IO_write_ptr
= __mempcpy (f
->_IO_write_ptr
, s
, count
);
1331 memcpy (f
->_IO_write_ptr
, s
, count
);
1332 f
->_IO_write_ptr
+= count
;
1338 register char *p
= f
->_IO_write_ptr
;
1339 register int i
= (int) count
;
1342 f
->_IO_write_ptr
= p
;
1346 if (to_do
+ must_flush
> 0)
1348 _IO_size_t block_size
, do_write
;
1349 /* Next flush the (full) buffer. */
1350 if (_IO_OVERFLOW (f
, EOF
) == EOF
)
1353 /* Try to maintain alignment: write a whole number of blocks.
1354 dont_write is what gets left over. */
1355 block_size
= f
->_IO_buf_end
- f
->_IO_buf_base
;
1356 do_write
= to_do
- (block_size
>= 128 ? to_do
% block_size
: 0);
1360 count
= new_do_write (f
, s
, do_write
);
1362 if (count
< do_write
)
1366 /* Now write out the remainder. Normally, this will fit in the
1367 buffer, but it's somewhat messier for line-buffered files,
1368 so we let _IO_default_xsputn handle the general case. */
1370 to_do
-= INTUSE(_IO_default_xsputn
) (f
, s
+do_write
, to_do
);
1374 INTDEF2(_IO_new_file_xsputn
, _IO_file_xsputn
)
1377 _IO_file_xsgetn (fp
, data
, n
)
1382 register _IO_size_t want
, have
;
1383 register _IO_ssize_t count
;
1384 register char *s
= data
;
1388 if (fp
->_IO_buf_base
== NULL
)
1390 /* Maybe we already have a push back pointer. */
1391 if (fp
->_IO_save_base
!= NULL
)
1393 free (fp
->_IO_save_base
);
1394 fp
->_flags
&= ~_IO_IN_BACKUP
;
1396 INTUSE(_IO_doallocbuf
) (fp
);
1401 have
= fp
->_IO_read_end
- fp
->_IO_read_ptr
;
1404 memcpy (s
, fp
->_IO_read_ptr
, want
);
1405 fp
->_IO_read_ptr
+= want
;
1413 s
= __mempcpy (s
, fp
->_IO_read_ptr
, have
);
1415 memcpy (s
, fp
->_IO_read_ptr
, have
);
1419 fp
->_IO_read_ptr
+= have
;
1422 /* Check for backup and repeat */
1423 if (_IO_in_backup (fp
))
1425 _IO_switch_to_main_get_area (fp
);
1429 /* If we now want less than a buffer, underflow and repeat
1430 the copy. Otherwise, _IO_SYSREAD directly to
1432 if (fp
->_IO_buf_base
1433 && want
< (size_t) (fp
->_IO_buf_end
- fp
->_IO_buf_base
))
1435 if (__underflow (fp
) == EOF
)
1441 /* These must be set before the sysread as we might longjmp out
1442 waiting for input. */
1443 _IO_setg (fp
, fp
->_IO_buf_base
, fp
->_IO_buf_base
, fp
->_IO_buf_base
);
1444 _IO_setp (fp
, fp
->_IO_buf_base
, fp
->_IO_buf_base
);
1446 /* Try to maintain alignment: read a whole number of blocks. */
1448 if (fp
->_IO_buf_base
)
1450 _IO_size_t block_size
= fp
->_IO_buf_end
- fp
->_IO_buf_base
;
1451 if (block_size
>= 128)
1452 count
-= want
% block_size
;
1455 count
= _IO_SYSREAD (fp
, s
, count
);
1459 fp
->_flags
|= _IO_EOF_SEEN
;
1461 fp
->_flags
|= _IO_ERR_SEEN
;
1468 if (fp
->_offset
!= _IO_pos_BAD
)
1469 _IO_pos_adjust (fp
->_offset
, count
);
1475 INTDEF(_IO_file_xsgetn
)
1477 static _IO_size_t _IO_file_xsgetn_mmap
__P ((_IO_FILE
*, void *, _IO_size_t
));
1479 _IO_file_xsgetn_mmap (fp
, data
, n
)
1484 register _IO_size_t have
;
1485 char *read_ptr
= fp
->_IO_read_ptr
;
1486 register char *s
= (char *) data
;
1488 have
= fp
->_IO_read_end
- fp
->_IO_read_ptr
;
1492 if (__builtin_expect (_IO_in_backup (fp
), 0))
1495 s
= __mempcpy (s
, read_ptr
, have
);
1497 memcpy (s
, read_ptr
, have
);
1501 _IO_switch_to_main_get_area (fp
);
1502 read_ptr
= fp
->_IO_read_ptr
;
1503 have
= fp
->_IO_read_end
- fp
->_IO_read_ptr
;
1508 /* Check that we are mapping all of the file, in case it grew. */
1509 if (__builtin_expect (mmap_remap_check (fp
), 0))
1510 /* We punted mmap, so complete with the vanilla code. */
1511 return s
- (char *) data
+ _IO_XSGETN (fp
, data
, n
);
1513 read_ptr
= fp
->_IO_read_ptr
;
1514 have
= fp
->_IO_read_end
- read_ptr
;
1519 fp
->_flags
|= _IO_EOF_SEEN
;
1523 have
= MIN (have
, n
);
1525 s
= __mempcpy (s
, read_ptr
, have
);
1527 memcpy (s
, read_ptr
, have
);
1530 fp
->_IO_read_ptr
= read_ptr
+ have
;
1533 return s
- (char *) data
;
1536 static _IO_size_t _IO_file_xsgetn_maybe_mmap
__P ((_IO_FILE
*, void *,
1539 _IO_file_xsgetn_maybe_mmap (fp
, data
, n
)
1544 /* We only get here if this is the first attempt to read something.
1545 Decide which operations to use and then punt to the chosen one. */
1547 decide_maybe_mmap (fp
);
1548 return _IO_XSGETN (fp
, data
, n
);
1552 # undef _IO_do_write
1553 versioned_symbol (libc
, _IO_new_do_write
, _IO_do_write
, GLIBC_2_1
);
1554 versioned_symbol (libc
, _IO_new_file_attach
, _IO_file_attach
, GLIBC_2_1
);
1555 versioned_symbol (libc
, _IO_new_file_close_it
, _IO_file_close_it
, GLIBC_2_1
);
1556 versioned_symbol (libc
, _IO_new_file_finish
, _IO_file_finish
, GLIBC_2_1
);
1557 versioned_symbol (libc
, _IO_new_file_fopen
, _IO_file_fopen
, GLIBC_2_1
);
1558 versioned_symbol (libc
, _IO_new_file_init
, _IO_file_init
, GLIBC_2_1
);
1559 versioned_symbol (libc
, _IO_new_file_setbuf
, _IO_file_setbuf
, GLIBC_2_1
);
1560 versioned_symbol (libc
, _IO_new_file_sync
, _IO_file_sync
, GLIBC_2_1
);
1561 versioned_symbol (libc
, _IO_new_file_overflow
, _IO_file_overflow
, GLIBC_2_1
);
1562 versioned_symbol (libc
, _IO_new_file_seekoff
, _IO_file_seekoff
, GLIBC_2_1
);
1563 versioned_symbol (libc
, _IO_new_file_underflow
, _IO_file_underflow
, GLIBC_2_1
);
1564 versioned_symbol (libc
, _IO_new_file_write
, _IO_file_write
, GLIBC_2_1
);
1565 versioned_symbol (libc
, _IO_new_file_xsputn
, _IO_file_xsputn
, GLIBC_2_1
);
1568 struct _IO_jump_t _IO_file_jumps
=
1571 JUMP_INIT(finish
, INTUSE(_IO_file_finish
)),
1572 JUMP_INIT(overflow
, INTUSE(_IO_file_overflow
)),
1573 JUMP_INIT(underflow
, INTUSE(_IO_file_underflow
)),
1574 JUMP_INIT(uflow
, INTUSE(_IO_default_uflow
)),
1575 JUMP_INIT(pbackfail
, INTUSE(_IO_default_pbackfail
)),
1576 JUMP_INIT(xsputn
, INTUSE(_IO_file_xsputn
)),
1577 JUMP_INIT(xsgetn
, INTUSE(_IO_file_xsgetn
)),
1578 JUMP_INIT(seekoff
, _IO_new_file_seekoff
),
1579 JUMP_INIT(seekpos
, _IO_default_seekpos
),
1580 JUMP_INIT(setbuf
, _IO_new_file_setbuf
),
1581 JUMP_INIT(sync
, _IO_new_file_sync
),
1582 JUMP_INIT(doallocate
, INTUSE(_IO_file_doallocate
)),
1583 JUMP_INIT(read
, INTUSE(_IO_file_read
)),
1584 JUMP_INIT(write
, _IO_new_file_write
),
1585 JUMP_INIT(seek
, INTUSE(_IO_file_seek
)),
1586 JUMP_INIT(close
, INTUSE(_IO_file_close
)),
1587 JUMP_INIT(stat
, INTUSE(_IO_file_stat
)),
1588 JUMP_INIT(showmanyc
, _IO_default_showmanyc
),
1589 JUMP_INIT(imbue
, _IO_default_imbue
)
1591 INTVARDEF(_IO_file_jumps
)
1593 struct _IO_jump_t _IO_file_jumps_mmap
=
1596 JUMP_INIT(finish
, INTUSE(_IO_file_finish
)),
1597 JUMP_INIT(overflow
, INTUSE(_IO_file_overflow
)),
1598 JUMP_INIT(underflow
, _IO_file_underflow_mmap
),
1599 JUMP_INIT(uflow
, INTUSE(_IO_default_uflow
)),
1600 JUMP_INIT(pbackfail
, INTUSE(_IO_default_pbackfail
)),
1601 JUMP_INIT(xsputn
, _IO_new_file_xsputn
),
1602 JUMP_INIT(xsgetn
, _IO_file_xsgetn_mmap
),
1603 JUMP_INIT(seekoff
, _IO_file_seekoff_mmap
),
1604 JUMP_INIT(seekpos
, _IO_default_seekpos
),
1605 JUMP_INIT(setbuf
, (_IO_setbuf_t
) _IO_file_setbuf_mmap
),
1606 JUMP_INIT(sync
, _IO_file_sync_mmap
),
1607 JUMP_INIT(doallocate
, INTUSE(_IO_file_doallocate
)),
1608 JUMP_INIT(read
, INTUSE(_IO_file_read
)),
1609 JUMP_INIT(write
, _IO_new_file_write
),
1610 JUMP_INIT(seek
, INTUSE(_IO_file_seek
)),
1611 JUMP_INIT(close
, _IO_file_close_mmap
),
1612 JUMP_INIT(stat
, INTUSE(_IO_file_stat
)),
1613 JUMP_INIT(showmanyc
, _IO_default_showmanyc
),
1614 JUMP_INIT(imbue
, _IO_default_imbue
)
1617 struct _IO_jump_t _IO_file_jumps_maybe_mmap
=
1620 JUMP_INIT(finish
, INTUSE(_IO_file_finish
)),
1621 JUMP_INIT(overflow
, INTUSE(_IO_file_overflow
)),
1622 JUMP_INIT(underflow
, _IO_file_underflow_maybe_mmap
),
1623 JUMP_INIT(uflow
, INTUSE(_IO_default_uflow
)),
1624 JUMP_INIT(pbackfail
, INTUSE(_IO_default_pbackfail
)),
1625 JUMP_INIT(xsputn
, _IO_new_file_xsputn
),
1626 JUMP_INIT(xsgetn
, _IO_file_xsgetn_maybe_mmap
),
1627 JUMP_INIT(seekoff
, _IO_file_seekoff_maybe_mmap
),
1628 JUMP_INIT(seekpos
, _IO_default_seekpos
),
1629 JUMP_INIT(setbuf
, (_IO_setbuf_t
) _IO_file_setbuf_mmap
),
1630 JUMP_INIT(sync
, _IO_new_file_sync
),
1631 JUMP_INIT(doallocate
, INTUSE(_IO_file_doallocate
)),
1632 JUMP_INIT(read
, INTUSE(_IO_file_read
)),
1633 JUMP_INIT(write
, _IO_new_file_write
),
1634 JUMP_INIT(seek
, INTUSE(_IO_file_seek
)),
1635 JUMP_INIT(close
, _IO_file_close
),
1636 JUMP_INIT(stat
, INTUSE(_IO_file_stat
)),
1637 JUMP_INIT(showmanyc
, _IO_default_showmanyc
),
1638 JUMP_INIT(imbue
, _IO_default_imbue
)