1 /* Copyright (C) 1993-2014 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>.
18 As a special exception, if you link the code in this file with
19 files compiled with a GNU compiler to produce an executable,
20 that does not cause the resulting executable to be covered by
21 the GNU Lesser General Public License. This exception does not
22 however invalidate any other reasons why the executable file
23 might be covered by the GNU Lesser General Public License.
24 This exception applies to code released by its copyright holders
25 in files containing the exception. */
27 /* NOTE: libio is now exclusively used only by glibc since libstdc++ has its
28 own implementation. As a result, functions that were implemented for C++
29 (like *sputn) may no longer have C++ semantics. This is of course only
30 relevant for internal callers of these functions since these functions are
31 not intended for external use otherwise.
33 FIXME: All of the C++ cruft eventually needs to go away. */
37 # define __set_errno(Val) errno = (Val)
39 #if defined __GLIBC__ && __GLIBC__ >= 2
40 # include <bits/libc-lock.h>
42 /*# include <comthread.h>*/
45 #include <math_ldbl_opt.h>
49 /* Control of exported symbols. Used in glibc. By default we don't
51 #ifndef libc_hidden_proto
52 # define libc_hidden_proto(name)
54 #ifndef libc_hidden_def
55 # define libc_hidden_def(name)
57 #ifndef libc_hidden_weak
58 # define libc_hidden_weak(name)
65 #define _IO_seek_set 0
66 #define _IO_seek_cur 1
67 #define _IO_seek_end 2
69 /* THE JUMPTABLE FUNCTIONS.
71 * The _IO_FILE type is used to implement the FILE type in GNU libc,
72 * as well as the streambuf class in GNU iostreams for C++.
73 * These are all the same, just used differently.
74 * An _IO_FILE (or FILE) object is allows followed by a pointer to
75 * a jump table (of pointers to functions). The pointer is accessed
76 * with the _IO_JUMPS macro. The jump table has an eccentric format,
77 * so as to be compatible with the layout of a C++ virtual function table.
78 * (as implemented by g++). When a pointer to a streambuf object is
79 * coerced to an (_IO_FILE*), then _IO_JUMPS on the result just
80 * happens to point to the virtual function table of the streambuf.
81 * Thus the _IO_JUMPS function table used for C stdio/libio does
82 * double duty as the virtual function table for C++ streambuf.
84 * The entries in the _IO_JUMPS function table (and hence also the
85 * virtual functions of a streambuf) are described below.
86 * The first parameter of each function entry is the _IO_FILE/streambuf
87 * object being acted on (i.e. the 'this' parameter).
91 # include <shlib-compat.h>
92 # if !SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
93 /* Setting this macro disables the use of the _vtable_offset
94 bias in _IO_JUMPS_FUNCS, below. That is only needed if we
95 want to support old binaries (see oldfileops.c). */
96 # define _G_IO_NO_BACKWARD_COMPAT 1
100 #if (!defined _IO_USE_OLD_IO_FILE \
101 && (!defined _G_IO_NO_BACKWARD_COMPAT || _G_IO_NO_BACKWARD_COMPAT == 0))
102 # define _IO_JUMPS_OFFSET 1
105 #define _IO_JUMPS(THIS) (THIS)->vtable
106 #define _IO_WIDE_JUMPS(THIS) ((struct _IO_FILE *) (THIS))->_wide_data->_wide_vtable
107 #define _IO_CHECK_WIDE(THIS) (((struct _IO_FILE *) (THIS))->_wide_data != NULL)
110 # define _IO_JUMPS_FUNC(THIS) \
111 (*(struct _IO_jump_t **) ((void *) &_IO_JUMPS ((struct _IO_FILE_plus *) (THIS)) \
112 + (THIS)->_vtable_offset))
113 # define _IO_vtable_offset(THIS) (THIS)->_vtable_offset
115 # define _IO_JUMPS_FUNC(THIS) _IO_JUMPS ((struct _IO_FILE_plus *) (THIS))
116 # define _IO_vtable_offset(THIS) 0
118 #define _IO_WIDE_JUMPS_FUNC(THIS) _IO_WIDE_JUMPS(THIS)
119 #define JUMP_FIELD(TYPE, NAME) TYPE NAME
120 #define JUMP0(FUNC, THIS) (_IO_JUMPS_FUNC(THIS)->FUNC) (THIS)
121 #define JUMP1(FUNC, THIS, X1) (_IO_JUMPS_FUNC(THIS)->FUNC) (THIS, X1)
122 #define JUMP2(FUNC, THIS, X1, X2) (_IO_JUMPS_FUNC(THIS)->FUNC) (THIS, X1, X2)
123 #define JUMP3(FUNC, THIS, X1,X2,X3) (_IO_JUMPS_FUNC(THIS)->FUNC) (THIS, X1,X2, X3)
124 #define JUMP_INIT(NAME, VALUE) VALUE
125 #define JUMP_INIT_DUMMY JUMP_INIT(dummy, 0), JUMP_INIT (dummy2, 0)
127 #define WJUMP0(FUNC, THIS) (_IO_WIDE_JUMPS_FUNC(THIS)->FUNC) (THIS)
128 #define WJUMP1(FUNC, THIS, X1) (_IO_WIDE_JUMPS_FUNC(THIS)->FUNC) (THIS, X1)
129 #define WJUMP2(FUNC, THIS, X1, X2) (_IO_WIDE_JUMPS_FUNC(THIS)->FUNC) (THIS, X1, X2)
130 #define WJUMP3(FUNC, THIS, X1,X2,X3) (_IO_WIDE_JUMPS_FUNC(THIS)->FUNC) (THIS, X1,X2, X3)
132 /* The 'finish' function does any final cleaning up of an _IO_FILE object.
133 It does not delete (free) it, but does everything else to finalize it.
134 It matches the streambuf::~streambuf virtual destructor. */
135 typedef void (*_IO_finish_t) (_IO_FILE *, int); /* finalize */
136 #define _IO_FINISH(FP) JUMP1 (__finish, FP, 0)
137 #define _IO_WFINISH(FP) WJUMP1 (__finish, FP, 0)
139 /* The 'overflow' hook flushes the buffer.
140 The second argument is a character, or EOF.
141 It matches the streambuf::overflow virtual function. */
142 typedef int (*_IO_overflow_t) (_IO_FILE *, int);
143 #define _IO_OVERFLOW(FP, CH) JUMP1 (__overflow, FP, CH)
144 #define _IO_WOVERFLOW(FP, CH) WJUMP1 (__overflow, FP, CH)
146 /* The 'underflow' hook tries to fills the get buffer.
147 It returns the next character (as an unsigned char) or EOF. The next
148 character remains in the get buffer, and the get position is not changed.
149 It matches the streambuf::underflow virtual function. */
150 typedef int (*_IO_underflow_t) (_IO_FILE *);
151 #define _IO_UNDERFLOW(FP) JUMP0 (__underflow, FP)
152 #define _IO_WUNDERFLOW(FP) WJUMP0 (__underflow, FP)
154 /* The 'uflow' hook returns the next character in the input stream
155 (cast to unsigned char), and increments the read position;
156 EOF is returned on failure.
157 It matches the streambuf::uflow virtual function, which is not in the
158 cfront implementation, but was added to C++ by the ANSI/ISO committee. */
159 #define _IO_UFLOW(FP) JUMP0 (__uflow, FP)
160 #define _IO_WUFLOW(FP) WJUMP0 (__uflow, FP)
162 /* The 'pbackfail' hook handles backing up.
163 It matches the streambuf::pbackfail virtual function. */
164 typedef int (*_IO_pbackfail_t) (_IO_FILE *, int);
165 #define _IO_PBACKFAIL(FP, CH) JUMP1 (__pbackfail, FP, CH)
166 #define _IO_WPBACKFAIL(FP, CH) WJUMP1 (__pbackfail, FP, CH)
168 /* The 'xsputn' hook writes upto N characters from buffer DATA.
169 Returns EOF or the number of character actually written.
170 It matches the streambuf::xsputn virtual function. */
171 typedef _IO_size_t (*_IO_xsputn_t) (_IO_FILE *FP, const void *DATA,
173 #define _IO_XSPUTN(FP, DATA, N) JUMP2 (__xsputn, FP, DATA, N)
174 #define _IO_WXSPUTN(FP, DATA, N) WJUMP2 (__xsputn, FP, DATA, N)
176 /* The 'xsgetn' hook reads upto N characters into buffer DATA.
177 Returns the number of character actually read.
178 It matches the streambuf::xsgetn virtual function. */
179 typedef _IO_size_t (*_IO_xsgetn_t) (_IO_FILE *FP, void *DATA, _IO_size_t N);
180 #define _IO_XSGETN(FP, DATA, N) JUMP2 (__xsgetn, FP, DATA, N)
181 #define _IO_WXSGETN(FP, DATA, N) WJUMP2 (__xsgetn, FP, DATA, N)
183 /* The 'seekoff' hook moves the stream position to a new position
184 relative to the start of the file (if DIR==0), the current position
185 (MODE==1), or the end of the file (MODE==2).
186 It matches the streambuf::seekoff virtual function.
187 It is also used for the ANSI fseek function. */
188 typedef _IO_off64_t (*_IO_seekoff_t) (_IO_FILE *FP, _IO_off64_t OFF, int DIR,
190 #define _IO_SEEKOFF(FP, OFF, DIR, MODE) JUMP3 (__seekoff, FP, OFF, DIR, MODE)
191 #define _IO_WSEEKOFF(FP, OFF, DIR, MODE) WJUMP3 (__seekoff, FP, OFF, DIR, MODE)
193 /* The 'seekpos' hook also moves the stream position,
194 but to an absolute position given by a fpos64_t (seekpos).
195 It matches the streambuf::seekpos virtual function.
196 It is also used for the ANSI fgetpos and fsetpos functions. */
197 /* The _IO_seek_cur and _IO_seek_end options are not allowed. */
198 typedef _IO_off64_t (*_IO_seekpos_t) (_IO_FILE *, _IO_off64_t, int);
199 #define _IO_SEEKPOS(FP, POS, FLAGS) JUMP2 (__seekpos, FP, POS, FLAGS)
200 #define _IO_WSEEKPOS(FP, POS, FLAGS) WJUMP2 (__seekpos, FP, POS, FLAGS)
202 /* The 'setbuf' hook gives a buffer to the file.
203 It matches the streambuf::setbuf virtual function. */
204 typedef _IO_FILE* (*_IO_setbuf_t) (_IO_FILE *, char *, _IO_ssize_t);
205 #define _IO_SETBUF(FP, BUFFER, LENGTH) JUMP2 (__setbuf, FP, BUFFER, LENGTH)
206 #define _IO_WSETBUF(FP, BUFFER, LENGTH) WJUMP2 (__setbuf, FP, BUFFER, LENGTH)
208 /* The 'sync' hook attempts to synchronize the internal data structures
209 of the file with the external state.
210 It matches the streambuf::sync virtual function. */
211 typedef int (*_IO_sync_t) (_IO_FILE *);
212 #define _IO_SYNC(FP) JUMP0 (__sync, FP)
213 #define _IO_WSYNC(FP) WJUMP0 (__sync, FP)
215 /* The 'doallocate' hook is used to tell the file to allocate a buffer.
216 It matches the streambuf::doallocate virtual function, which is not
217 in the ANSI/ISO C++ standard, but is part traditional implementations. */
218 typedef int (*_IO_doallocate_t) (_IO_FILE *);
219 #define _IO_DOALLOCATE(FP) JUMP0 (__doallocate, FP)
220 #define _IO_WDOALLOCATE(FP) WJUMP0 (__doallocate, FP)
222 /* The following four hooks (sysread, syswrite, sysclose, sysseek, and
223 sysstat) are low-level hooks specific to this implementation.
224 There is no correspondence in the ANSI/ISO C++ standard library.
225 The hooks basically correspond to the Unix system functions
226 (read, write, close, lseek, and stat) except that a _IO_FILE*
227 parameter is used instead of an integer file descriptor; the default
228 implementation used for normal files just calls those functions.
229 The advantage of overriding these functions instead of the higher-level
230 ones (underflow, overflow etc) is that you can leave all the buffering
231 higher-level functions. */
233 /* The 'sysread' hook is used to read data from the external file into
234 an existing buffer. It generalizes the Unix read(2) function.
235 It matches the streambuf::sys_read virtual function, which is
236 specific to this implementation. */
237 typedef _IO_ssize_t (*_IO_read_t) (_IO_FILE *, void *, _IO_ssize_t);
238 #define _IO_SYSREAD(FP, DATA, LEN) JUMP2 (__read, FP, DATA, LEN)
239 #define _IO_WSYSREAD(FP, DATA, LEN) WJUMP2 (__read, FP, DATA, LEN)
241 /* The 'syswrite' hook is used to write data from an existing buffer
242 to an external file. It generalizes the Unix write(2) function.
243 It matches the streambuf::sys_write virtual function, which is
244 specific to this implementation. */
245 typedef _IO_ssize_t (*_IO_write_t) (_IO_FILE *, const void *, _IO_ssize_t);
246 #define _IO_SYSWRITE(FP, DATA, LEN) JUMP2 (__write, FP, DATA, LEN)
247 #define _IO_WSYSWRITE(FP, DATA, LEN) WJUMP2 (__write, FP, DATA, LEN)
249 /* The 'sysseek' hook is used to re-position an external file.
250 It generalizes the Unix lseek(2) function.
251 It matches the streambuf::sys_seek virtual function, which is
252 specific to this implementation. */
253 typedef _IO_off64_t (*_IO_seek_t) (_IO_FILE *, _IO_off64_t, int);
254 #define _IO_SYSSEEK(FP, OFFSET, MODE) JUMP2 (__seek, FP, OFFSET, MODE)
255 #define _IO_WSYSSEEK(FP, OFFSET, MODE) WJUMP2 (__seek, FP, OFFSET, MODE)
257 /* The 'sysclose' hook is used to finalize (close, finish up) an
258 external file. It generalizes the Unix close(2) function.
259 It matches the streambuf::sys_close virtual function, which is
260 specific to this implementation. */
261 typedef int (*_IO_close_t) (_IO_FILE *); /* finalize */
262 #define _IO_SYSCLOSE(FP) JUMP0 (__close, FP)
263 #define _IO_WSYSCLOSE(FP) WJUMP0 (__close, FP)
265 /* The 'sysstat' hook is used to get information about an external file
266 into a struct stat buffer. It generalizes the Unix fstat(2) call.
267 It matches the streambuf::sys_stat virtual function, which is
268 specific to this implementation. */
269 typedef int (*_IO_stat_t) (_IO_FILE *, void *);
270 #define _IO_SYSSTAT(FP, BUF) JUMP1 (__stat, FP, BUF)
271 #define _IO_WSYSSTAT(FP, BUF) WJUMP1 (__stat, FP, BUF)
273 /* The 'showmany' hook can be used to get an image how much input is
274 available. In many cases the answer will be 0 which means unknown
275 but some cases one can provide real information. */
276 typedef int (*_IO_showmanyc_t) (_IO_FILE *);
277 #define _IO_SHOWMANYC(FP) JUMP0 (__showmanyc, FP)
278 #define _IO_WSHOWMANYC(FP) WJUMP0 (__showmanyc, FP)
280 /* The 'imbue' hook is used to get information about the currently
281 installed locales. */
282 typedef void (*_IO_imbue_t) (_IO_FILE *, void *);
283 #define _IO_IMBUE(FP, LOCALE) JUMP1 (__imbue, FP, LOCALE)
284 #define _IO_WIMBUE(FP, LOCALE) WJUMP1 (__imbue, FP, LOCALE)
287 #define _IO_CHAR_TYPE char /* unsigned char ? */
288 #define _IO_INT_TYPE int
292 JUMP_FIELD(size_t, __dummy);
293 JUMP_FIELD(size_t, __dummy2);
294 JUMP_FIELD(_IO_finish_t, __finish);
295 JUMP_FIELD(_IO_overflow_t, __overflow);
296 JUMP_FIELD(_IO_underflow_t, __underflow);
297 JUMP_FIELD(_IO_underflow_t, __uflow);
298 JUMP_FIELD(_IO_pbackfail_t, __pbackfail);
300 JUMP_FIELD(_IO_xsputn_t, __xsputn);
301 JUMP_FIELD(_IO_xsgetn_t, __xsgetn);
302 JUMP_FIELD(_IO_seekoff_t, __seekoff);
303 JUMP_FIELD(_IO_seekpos_t, __seekpos);
304 JUMP_FIELD(_IO_setbuf_t, __setbuf);
305 JUMP_FIELD(_IO_sync_t, __sync);
306 JUMP_FIELD(_IO_doallocate_t, __doallocate);
307 JUMP_FIELD(_IO_read_t, __read);
308 JUMP_FIELD(_IO_write_t, __write);
309 JUMP_FIELD(_IO_seek_t, __seek);
310 JUMP_FIELD(_IO_close_t, __close);
311 JUMP_FIELD(_IO_stat_t, __stat);
312 JUMP_FIELD(_IO_showmanyc_t, __showmanyc);
313 JUMP_FIELD(_IO_imbue_t, __imbue);
320 /* We always allocate an extra word following an _IO_FILE.
321 This contains a pointer to the function jump table used.
322 This is for compatibility with C++ streambuf; the word can
323 be used to smash to a pointer to a virtual function table. */
328 const struct _IO_jump_t *vtable;
331 #ifdef _IO_USE_OLD_IO_FILE
332 /* This structure is used by the compatibility code as if it were an
333 _IO_FILE_plus, but has enough space to initialize the _mode argument
334 of an _IO_FILE_complete. */
335 struct _IO_FILE_complete_plus
337 struct _IO_FILE_complete file;
338 const struct _IO_jump_t *vtable;
342 /* Special file type for fopencookie function. */
343 struct _IO_cookie_file
345 struct _IO_FILE_plus __fp;
347 _IO_cookie_io_functions_t __io_functions;
350 _IO_FILE *_IO_fopencookie (void *cookie, const char *mode,
351 _IO_cookie_io_functions_t io_functions);
354 /* Iterator type for walking global linked list of _IO_FILE objects. */
356 typedef struct _IO_FILE *_IO_ITER;
358 /* Generic functions */
360 extern void _IO_switch_to_main_get_area (_IO_FILE *) __THROW;
361 extern void _IO_switch_to_backup_area (_IO_FILE *) __THROW;
362 extern int _IO_switch_to_get_mode (_IO_FILE *);
363 libc_hidden_proto (_IO_switch_to_get_mode)
364 extern void _IO_init (_IO_FILE *, int) __THROW;
365 libc_hidden_proto (_IO_init)
366 extern int _IO_sputbackc (_IO_FILE *, int) __THROW;
367 libc_hidden_proto (_IO_sputbackc)
368 extern int _IO_sungetc (_IO_FILE *) __THROW;
369 extern void _IO_un_link (struct _IO_FILE_plus *) __THROW;
370 libc_hidden_proto (_IO_un_link)
371 extern void _IO_link_in (struct _IO_FILE_plus *) __THROW;
372 libc_hidden_proto (_IO_link_in)
373 extern void _IO_doallocbuf (_IO_FILE *) __THROW;
374 libc_hidden_proto (_IO_doallocbuf)
375 extern void _IO_unsave_markers (_IO_FILE *) __THROW;
376 libc_hidden_proto (_IO_unsave_markers)
377 extern void _IO_setb (_IO_FILE *, char *, char *, int) __THROW;
378 libc_hidden_proto (_IO_setb)
379 extern unsigned _IO_adjust_column (unsigned, const char *, int) __THROW;
380 libc_hidden_proto (_IO_adjust_column)
381 #define _IO_sputn(__fp, __s, __n) _IO_XSPUTN (__fp, __s, __n)
383 _IO_ssize_t _IO_least_wmarker (_IO_FILE *, wchar_t *) __THROW;
384 libc_hidden_proto (_IO_least_wmarker)
385 extern void _IO_switch_to_main_wget_area (_IO_FILE *) __THROW;
386 libc_hidden_proto (_IO_switch_to_main_wget_area)
387 extern void _IO_switch_to_wbackup_area (_IO_FILE *) __THROW;
388 libc_hidden_proto (_IO_switch_to_wbackup_area)
389 extern int _IO_switch_to_wget_mode (_IO_FILE *);
390 libc_hidden_proto (_IO_switch_to_wget_mode)
391 extern void _IO_wsetb (_IO_FILE *, wchar_t *, wchar_t *, int) __THROW;
392 libc_hidden_proto (_IO_wsetb)
393 extern wint_t _IO_sputbackwc (_IO_FILE *, wint_t) __THROW;
394 libc_hidden_proto (_IO_sputbackwc)
395 extern wint_t _IO_sungetwc (_IO_FILE *) __THROW;
396 extern void _IO_wdoallocbuf (_IO_FILE *) __THROW;
397 libc_hidden_proto (_IO_wdoallocbuf)
398 extern void _IO_unsave_wmarkers (_IO_FILE *) __THROW;
399 extern unsigned _IO_adjust_wcolumn (unsigned, const wchar_t *, int) __THROW;
400 extern _IO_off64_t get_file_offset (_IO_FILE *fp);
402 /* Marker-related function. */
404 extern void _IO_init_marker (struct _IO_marker *, _IO_FILE *);
405 extern void _IO_init_wmarker (struct _IO_marker *, _IO_FILE *);
406 extern void _IO_remove_marker (struct _IO_marker *) __THROW;
407 extern int _IO_marker_difference (struct _IO_marker *, struct _IO_marker *)
409 extern int _IO_marker_delta (struct _IO_marker *) __THROW;
410 extern int _IO_wmarker_delta (struct _IO_marker *) __THROW;
411 extern int _IO_seekmark (_IO_FILE *, struct _IO_marker *, int) __THROW;
412 extern int _IO_seekwmark (_IO_FILE *, struct _IO_marker *, int) __THROW;
414 /* Functions for iterating global list and dealing with its lock */
416 extern _IO_ITER _IO_iter_begin (void) __THROW;
417 libc_hidden_proto (_IO_iter_begin)
418 extern _IO_ITER _IO_iter_end (void) __THROW;
419 libc_hidden_proto (_IO_iter_end)
420 extern _IO_ITER _IO_iter_next (_IO_ITER) __THROW;
421 libc_hidden_proto (_IO_iter_next)
422 extern _IO_FILE *_IO_iter_file (_IO_ITER) __THROW;
423 libc_hidden_proto (_IO_iter_file)
424 extern void _IO_list_lock (void) __THROW;
425 libc_hidden_proto (_IO_list_lock)
426 extern void _IO_list_unlock (void) __THROW;
427 libc_hidden_proto (_IO_list_unlock)
428 extern void _IO_list_resetlock (void) __THROW;
429 libc_hidden_proto (_IO_list_resetlock)
431 /* Default jumptable functions. */
433 extern int _IO_default_underflow (_IO_FILE *) __THROW;
434 extern int _IO_default_uflow (_IO_FILE *);
435 libc_hidden_proto (_IO_default_uflow)
436 extern wint_t _IO_wdefault_uflow (_IO_FILE *);
437 libc_hidden_proto (_IO_wdefault_uflow)
438 extern int _IO_default_doallocate (_IO_FILE *) __THROW;
439 libc_hidden_proto (_IO_default_doallocate)
440 extern int _IO_wdefault_doallocate (_IO_FILE *) __THROW;
441 libc_hidden_proto (_IO_wdefault_doallocate)
442 extern void _IO_default_finish (_IO_FILE *, int) __THROW;
443 libc_hidden_proto (_IO_default_finish)
444 extern void _IO_wdefault_finish (_IO_FILE *, int) __THROW;
445 libc_hidden_proto (_IO_wdefault_finish)
446 extern int _IO_default_pbackfail (_IO_FILE *, int) __THROW;
447 libc_hidden_proto (_IO_default_pbackfail)
448 extern wint_t _IO_wdefault_pbackfail (_IO_FILE *, wint_t) __THROW;
449 libc_hidden_proto (_IO_wdefault_pbackfail)
450 extern _IO_FILE* _IO_default_setbuf (_IO_FILE *, char *, _IO_ssize_t);
451 extern _IO_size_t _IO_default_xsputn (_IO_FILE *, const void *, _IO_size_t);
452 libc_hidden_proto (_IO_default_xsputn)
453 extern _IO_size_t _IO_wdefault_xsputn (_IO_FILE *, const void *, _IO_size_t);
454 libc_hidden_proto (_IO_wdefault_xsputn)
455 extern _IO_size_t _IO_default_xsgetn (_IO_FILE *, void *, _IO_size_t);
456 libc_hidden_proto (_IO_default_xsgetn)
457 extern _IO_size_t _IO_wdefault_xsgetn (_IO_FILE *, void *, _IO_size_t);
458 libc_hidden_proto (_IO_wdefault_xsgetn)
459 extern _IO_off64_t _IO_default_seekoff (_IO_FILE *, _IO_off64_t, int, int)
461 extern _IO_off64_t _IO_default_seekpos (_IO_FILE *, _IO_off64_t, int);
462 extern _IO_ssize_t _IO_default_write (_IO_FILE *, const void *, _IO_ssize_t);
463 extern _IO_ssize_t _IO_default_read (_IO_FILE *, void *, _IO_ssize_t);
464 extern int _IO_default_stat (_IO_FILE *, void *) __THROW;
465 extern _IO_off64_t _IO_default_seek (_IO_FILE *, _IO_off64_t, int) __THROW;
466 extern int _IO_default_sync (_IO_FILE *) __THROW;
467 #define _IO_default_close ((_IO_close_t) _IO_default_sync)
468 extern int _IO_default_showmanyc (_IO_FILE *) __THROW;
469 extern void _IO_default_imbue (_IO_FILE *, void *) __THROW;
471 extern const struct _IO_jump_t _IO_file_jumps;
472 libc_hidden_proto (_IO_file_jumps)
473 extern const struct _IO_jump_t _IO_file_jumps_mmap attribute_hidden;
474 extern const struct _IO_jump_t _IO_file_jumps_maybe_mmap attribute_hidden;
475 extern const struct _IO_jump_t _IO_wfile_jumps;
476 libc_hidden_proto (_IO_wfile_jumps)
477 extern const struct _IO_jump_t _IO_wfile_jumps_mmap attribute_hidden;
478 extern const struct _IO_jump_t _IO_wfile_jumps_maybe_mmap attribute_hidden;
479 extern const struct _IO_jump_t _IO_old_file_jumps attribute_hidden;
480 extern const struct _IO_jump_t _IO_streambuf_jumps;
481 extern const struct _IO_jump_t _IO_old_proc_jumps attribute_hidden;
482 extern const struct _IO_jump_t _IO_str_jumps attribute_hidden;
483 extern const struct _IO_jump_t _IO_wstr_jumps attribute_hidden;
484 extern const struct _IO_codecvt __libio_codecvt attribute_hidden;
485 extern int _IO_do_write (_IO_FILE *, const char *, _IO_size_t);
486 libc_hidden_proto (_IO_do_write)
487 extern int _IO_new_do_write (_IO_FILE *, const char *, _IO_size_t);
488 extern int _IO_old_do_write (_IO_FILE *, const char *, _IO_size_t);
489 extern int _IO_wdo_write (_IO_FILE *, const wchar_t *, _IO_size_t);
490 libc_hidden_proto (_IO_wdo_write)
491 extern int _IO_flush_all_lockp (int);
492 extern int _IO_flush_all (void);
493 libc_hidden_proto (_IO_flush_all)
494 extern int _IO_cleanup (void);
495 extern void _IO_flush_all_linebuffered (void);
496 libc_hidden_proto (_IO_flush_all_linebuffered)
497 extern int _IO_new_fgetpos (_IO_FILE *, _IO_fpos_t *);
498 extern int _IO_old_fgetpos (_IO_FILE *, _IO_fpos_t *);
499 extern int _IO_new_fsetpos (_IO_FILE *, const _IO_fpos_t *);
500 extern int _IO_old_fsetpos (_IO_FILE *, const _IO_fpos_t *);
501 extern int _IO_new_fgetpos64 (_IO_FILE *, _IO_fpos64_t *);
502 extern int _IO_old_fgetpos64 (_IO_FILE *, _IO_fpos64_t *);
503 extern int _IO_new_fsetpos64 (_IO_FILE *, const _IO_fpos64_t *);
504 extern int _IO_old_fsetpos64 (_IO_FILE *, const _IO_fpos64_t *);
505 extern void _IO_old_init (_IO_FILE *fp, int flags) __THROW;
508 #if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
509 # define _IO_do_flush(_f) \
511 ? _IO_do_write(_f, (_f)->_IO_write_base, \
512 (_f)->_IO_write_ptr-(_f)->_IO_write_base) \
513 : _IO_wdo_write(_f, (_f)->_wide_data->_IO_write_base, \
514 ((_f)->_wide_data->_IO_write_ptr \
515 - (_f)->_wide_data->_IO_write_base)))
517 # define _IO_do_flush(_f) \
518 _IO_do_write(_f, (_f)->_IO_write_base, \
519 (_f)->_IO_write_ptr-(_f)->_IO_write_base)
521 #define _IO_old_do_flush(_f) \
522 _IO_old_do_write(_f, (_f)->_IO_write_base, \
523 (_f)->_IO_write_ptr-(_f)->_IO_write_base)
524 #define _IO_in_put_mode(_fp) ((_fp)->_flags & _IO_CURRENTLY_PUTTING)
525 #define _IO_mask_flags(fp, f, mask) \
526 ((fp)->_flags = ((fp)->_flags & ~(mask)) | ((f) & (mask)))
527 #define _IO_setg(fp, eb, g, eg) ((fp)->_IO_read_base = (eb),\
528 (fp)->_IO_read_ptr = (g), (fp)->_IO_read_end = (eg))
529 #define _IO_wsetg(fp, eb, g, eg) ((fp)->_wide_data->_IO_read_base = (eb),\
530 (fp)->_wide_data->_IO_read_ptr = (g), \
531 (fp)->_wide_data->_IO_read_end = (eg))
532 #define _IO_setp(__fp, __p, __ep) \
533 ((__fp)->_IO_write_base = (__fp)->_IO_write_ptr \
534 = __p, (__fp)->_IO_write_end = (__ep))
535 #define _IO_wsetp(__fp, __p, __ep) \
536 ((__fp)->_wide_data->_IO_write_base \
537 = (__fp)->_wide_data->_IO_write_ptr = __p, \
538 (__fp)->_wide_data->_IO_write_end = (__ep))
539 #define _IO_have_backup(fp) ((fp)->_IO_save_base != NULL)
540 #define _IO_have_wbackup(fp) ((fp)->_wide_data->_IO_save_base != NULL)
541 #define _IO_in_backup(fp) ((fp)->_flags & _IO_IN_BACKUP)
542 #define _IO_have_markers(fp) ((fp)->_markers != NULL)
543 #define _IO_blen(fp) ((fp)->_IO_buf_end - (fp)->_IO_buf_base)
544 #define _IO_wblen(fp) ((fp)->_wide_data->_IO_buf_end \
545 - (fp)->_wide_data->_IO_buf_base)
547 /* Jumptable functions for files. */
549 extern int _IO_file_doallocate (_IO_FILE *) __THROW;
550 libc_hidden_proto (_IO_file_doallocate)
551 extern _IO_FILE* _IO_file_setbuf (_IO_FILE *, char *, _IO_ssize_t);
552 libc_hidden_proto (_IO_file_setbuf)
553 extern _IO_off64_t _IO_file_seekoff (_IO_FILE *, _IO_off64_t, int, int);
554 libc_hidden_proto (_IO_file_seekoff)
555 extern _IO_off64_t _IO_file_seekoff_mmap (_IO_FILE *, _IO_off64_t, int, int)
557 extern _IO_size_t _IO_file_xsputn (_IO_FILE *, const void *, _IO_size_t);
558 libc_hidden_proto (_IO_file_xsputn)
559 extern _IO_size_t _IO_file_xsgetn (_IO_FILE *, void *, _IO_size_t);
560 libc_hidden_proto (_IO_file_xsgetn)
561 extern int _IO_file_stat (_IO_FILE *, void *) __THROW;
562 libc_hidden_proto (_IO_file_stat)
563 extern int _IO_file_close (_IO_FILE *) __THROW;
564 libc_hidden_proto (_IO_file_close)
565 extern int _IO_file_close_mmap (_IO_FILE *) __THROW;
566 extern int _IO_file_underflow (_IO_FILE *);
567 libc_hidden_proto (_IO_file_underflow)
568 extern int _IO_file_underflow_mmap (_IO_FILE *);
569 extern int _IO_file_underflow_maybe_mmap (_IO_FILE *);
570 extern int _IO_file_overflow (_IO_FILE *, int);
571 libc_hidden_proto (_IO_file_overflow)
572 #define _IO_file_is_open(__fp) ((__fp)->_fileno != -1)
573 extern void _IO_file_init (struct _IO_FILE_plus *) __THROW;
574 libc_hidden_proto (_IO_file_init)
575 extern _IO_FILE* _IO_file_attach (_IO_FILE *, int);
576 libc_hidden_proto (_IO_file_attach)
577 extern _IO_FILE* _IO_file_open (_IO_FILE *, const char *, int, int, int, int);
578 libc_hidden_proto (_IO_file_open)
579 extern _IO_FILE* _IO_file_fopen (_IO_FILE *, const char *, const char *, int);
580 libc_hidden_proto (_IO_file_fopen)
581 extern _IO_ssize_t _IO_file_write (_IO_FILE *, const void *, _IO_ssize_t);
582 extern _IO_ssize_t _IO_file_read (_IO_FILE *, void *, _IO_ssize_t);
583 libc_hidden_proto (_IO_file_read)
584 extern int _IO_file_sync (_IO_FILE *);
585 libc_hidden_proto (_IO_file_sync)
586 extern int _IO_file_close_it (_IO_FILE *);
587 libc_hidden_proto (_IO_file_close_it)
588 extern _IO_off64_t _IO_file_seek (_IO_FILE *, _IO_off64_t, int) __THROW;
589 libc_hidden_proto (_IO_file_seek)
590 extern void _IO_file_finish (_IO_FILE *, int);
591 libc_hidden_proto (_IO_file_finish)
593 extern _IO_FILE* _IO_new_file_attach (_IO_FILE *, int);
594 extern int _IO_new_file_close_it (_IO_FILE *);
595 extern void _IO_new_file_finish (_IO_FILE *, int);
596 extern _IO_FILE* _IO_new_file_fopen (_IO_FILE *, const char *, const char *,
598 extern void _IO_no_init (_IO_FILE *, int, int, struct _IO_wide_data *,
599 const struct _IO_jump_t *) __THROW;
600 extern void _IO_new_file_init (struct _IO_FILE_plus *) __THROW;
601 extern _IO_FILE* _IO_new_file_setbuf (_IO_FILE *, char *, _IO_ssize_t);
602 extern _IO_FILE* _IO_file_setbuf_mmap (_IO_FILE *, char *, _IO_ssize_t);
603 extern int _IO_new_file_sync (_IO_FILE *);
604 extern int _IO_new_file_underflow (_IO_FILE *);
605 extern int _IO_new_file_overflow (_IO_FILE *, int);
606 extern _IO_off64_t _IO_new_file_seekoff (_IO_FILE *, _IO_off64_t, int, int);
607 extern _IO_ssize_t _IO_new_file_write (_IO_FILE *, const void *, _IO_ssize_t);
608 extern _IO_size_t _IO_new_file_xsputn (_IO_FILE *, const void *, _IO_size_t);
610 extern _IO_FILE* _IO_old_file_setbuf (_IO_FILE *, char *, _IO_ssize_t);
611 extern _IO_off64_t _IO_old_file_seekoff (_IO_FILE *, _IO_off64_t, int, int);
612 extern _IO_size_t _IO_old_file_xsputn (_IO_FILE *, const void *, _IO_size_t);
613 extern int _IO_old_file_underflow (_IO_FILE *);
614 extern int _IO_old_file_overflow (_IO_FILE *, int);
615 extern void _IO_old_file_init (struct _IO_FILE_plus *) __THROW;
616 extern _IO_FILE* _IO_old_file_attach (_IO_FILE *, int);
617 extern _IO_FILE* _IO_old_file_fopen (_IO_FILE *, const char *, const char *);
618 extern _IO_ssize_t _IO_old_file_write (_IO_FILE *, const void *, _IO_ssize_t);
619 extern int _IO_old_file_sync (_IO_FILE *);
620 extern int _IO_old_file_close_it (_IO_FILE *);
621 extern void _IO_old_file_finish (_IO_FILE *, int);
623 extern int _IO_wfile_doallocate (_IO_FILE *) __THROW;
624 extern _IO_size_t _IO_wfile_xsputn (_IO_FILE *, const void *, _IO_size_t);
625 libc_hidden_proto (_IO_wfile_xsputn)
626 extern _IO_FILE* _IO_wfile_setbuf (_IO_FILE *, wchar_t *, _IO_ssize_t);
627 extern wint_t _IO_wfile_sync (_IO_FILE *);
628 libc_hidden_proto (_IO_wfile_sync)
629 extern wint_t _IO_wfile_underflow (_IO_FILE *);
630 libc_hidden_proto (_IO_wfile_underflow)
631 extern wint_t _IO_wfile_overflow (_IO_FILE *, wint_t);
632 libc_hidden_proto (_IO_wfile_overflow)
633 extern _IO_off64_t _IO_wfile_seekoff (_IO_FILE *, _IO_off64_t, int, int);
634 libc_hidden_proto (_IO_wfile_seekoff)
636 /* Jumptable functions for proc_files. */
637 extern _IO_FILE* _IO_proc_open (_IO_FILE *, const char *, const char *)
639 extern _IO_FILE* _IO_new_proc_open (_IO_FILE *, const char *, const char *)
641 extern _IO_FILE* _IO_old_proc_open (_IO_FILE *, const char *, const char *);
642 extern int _IO_proc_close (_IO_FILE *) __THROW;
643 extern int _IO_new_proc_close (_IO_FILE *) __THROW;
644 extern int _IO_old_proc_close (_IO_FILE *);
646 /* Jumptable functions for strfiles. */
647 extern int _IO_str_underflow (_IO_FILE *) __THROW;
648 libc_hidden_proto (_IO_str_underflow)
649 extern int _IO_str_overflow (_IO_FILE *, int) __THROW;
650 libc_hidden_proto (_IO_str_overflow)
651 extern int _IO_str_pbackfail (_IO_FILE *, int) __THROW;
652 libc_hidden_proto (_IO_str_pbackfail)
653 extern _IO_off64_t _IO_str_seekoff (_IO_FILE *, _IO_off64_t, int, int) __THROW;
654 libc_hidden_proto (_IO_str_seekoff)
655 extern void _IO_str_finish (_IO_FILE *, int) __THROW;
657 /* Other strfile functions */
659 extern void _IO_str_init_static (struct _IO_strfile_ *, char *, int, char *)
661 extern void _IO_str_init_readonly (struct _IO_strfile_ *, const char *, int)
663 extern _IO_ssize_t _IO_str_count (_IO_FILE *) __THROW;
665 /* And the wide character versions. */
666 extern void _IO_wstr_init_static (_IO_FILE *, wchar_t *, _IO_size_t, wchar_t *)
668 extern _IO_ssize_t _IO_wstr_count (_IO_FILE *) __THROW;
669 extern _IO_wint_t _IO_wstr_overflow (_IO_FILE *, _IO_wint_t) __THROW;
670 extern _IO_wint_t _IO_wstr_underflow (_IO_FILE *) __THROW;
671 extern _IO_off64_t _IO_wstr_seekoff (_IO_FILE *, _IO_off64_t, int, int)
673 extern _IO_wint_t _IO_wstr_pbackfail (_IO_FILE *, _IO_wint_t) __THROW;
674 extern void _IO_wstr_finish (_IO_FILE *, int) __THROW;
676 extern int _IO_vasprintf (char **result_ptr, const char *format,
677 _IO_va_list args) __THROW;
678 extern int _IO_vdprintf (int d, const char *format, _IO_va_list arg);
679 extern int _IO_vsnprintf (char *string, _IO_size_t maxlen,
680 const char *format, _IO_va_list args) __THROW;
683 extern _IO_size_t _IO_getline (_IO_FILE *,char *, _IO_size_t, int, int);
684 libc_hidden_proto (_IO_getline)
685 extern _IO_size_t _IO_getline_info (_IO_FILE *,char *, _IO_size_t,
687 libc_hidden_proto (_IO_getline_info)
688 extern _IO_ssize_t _IO_getdelim (char **, _IO_size_t *, int, _IO_FILE *);
689 extern _IO_size_t _IO_getwline (_IO_FILE *,wchar_t *, _IO_size_t, wint_t, int);
690 extern _IO_size_t _IO_getwline_info (_IO_FILE *,wchar_t *, _IO_size_t,
691 wint_t, int, wint_t *);
693 extern struct _IO_FILE_plus *_IO_list_all;
694 libc_hidden_proto (_IO_list_all)
695 extern void (*_IO_cleanup_registration_needed) (void);
697 extern void _IO_str_init_static_internal (struct _IO_strfile_ *, char *,
698 _IO_size_t, char *) __THROW;
699 extern _IO_off64_t _IO_seekoff_unlocked (_IO_FILE *, _IO_off64_t, int, int)
701 extern _IO_off64_t _IO_seekpos_unlocked (_IO_FILE *, _IO_off64_t, int)
708 # if defined __GNUG__ && \
709 (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 8))
710 # define NULL (__null)
712 # if !defined(__cplusplus)
713 # define NULL ((void*)0)
724 # include <sys/mman.h>
725 # include <sys/param.h>
727 # if !defined(MAP_ANONYMOUS) && defined(MAP_ANON)
728 # define MAP_ANONYMOUS MAP_ANON
731 # if !defined(MAP_ANONYMOUS) || !defined(EXEC_PAGESIZE)
733 # define _G_HAVE_MMAP 0
736 #endif /* _G_HAVE_MMAP */
741 /* When using this code in the GNU libc we must not pollute the name space. */
743 # define munmap __munmap
744 # define ftruncate __ftruncate
747 # define ROUND_TO_PAGE(_S) \
748 (((_S) + EXEC_PAGESIZE - 1) & ~(EXEC_PAGESIZE - 1))
750 # define FREE_BUF(_B, _S) \
751 munmap ((_B), ROUND_TO_PAGE (_S))
752 # define ALLOC_BUF(_B, _S, _R) \
754 (_B) = (char *) mmap (0, ROUND_TO_PAGE (_S), \
755 PROT_READ | PROT_WRITE, \
756 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); \
757 if ((_B) == (char *) MAP_FAILED) \
760 # define ALLOC_WBUF(_B, _S, _R) \
762 (_B) = (wchar_t *) mmap (0, ROUND_TO_PAGE (_S), \
763 PROT_READ | PROT_WRITE, \
764 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); \
765 if ((_B) == (wchar_t *) MAP_FAILED) \
769 #else /* _G_HAVE_MMAP */
771 # define FREE_BUF(_B, _S) \
773 # define ALLOC_BUF(_B, _S, _R) \
775 (_B) = (char*)malloc(_S); \
779 # define ALLOC_WBUF(_B, _S, _R) \
781 (_B) = (wchar_t *)malloc(_S); \
786 #endif /* _G_HAVE_MMAP */
789 # define OS_FSTAT fstat
791 extern int _IO_vscanf (const char *, _IO_va_list) __THROW;
793 /* _IO_pos_BAD is an _IO_off64_t value indicating error, unknown, or EOF. */
795 # define _IO_pos_BAD ((_IO_off64_t) -1)
797 /* _IO_pos_adjust adjust an _IO_off64_t by some number of bytes. */
798 #ifndef _IO_pos_adjust
799 # define _IO_pos_adjust(pos, delta) ((pos) += (delta))
801 /* _IO_pos_0 is an _IO_off64_t value indicating beginning of file. */
803 # define _IO_pos_0 ((_IO_off64_t) 0)
811 /* check following! */
812 # ifdef _IO_USE_OLD_IO_FILE
813 # define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \
814 { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
815 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (_IO_FILE *) CHAIN, FD, \
816 0, _IO_pos_BAD, 0, 0, { 0 }, &_IO_stdfile_##FD##_lock }
818 # if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
819 # define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \
820 { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
821 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (_IO_FILE *) CHAIN, FD, \
822 0, _IO_pos_BAD, 0, 0, { 0 }, &_IO_stdfile_##FD##_lock, _IO_pos_BAD,\
825 # define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \
826 { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
827 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (_IO_FILE *) CHAIN, FD, \
828 0, _IO_pos_BAD, 0, 0, { 0 }, &_IO_stdfile_##FD##_lock, _IO_pos_BAD,\
833 # ifdef _IO_USE_OLD_IO_FILE
834 # define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \
835 { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
836 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (_IO_FILE *) CHAIN, FD, \
839 # if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
840 # define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \
841 { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
842 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (_IO_FILE *) CHAIN, FD, \
843 0, _IO_pos_BAD, 0, 0, { 0 }, 0, _IO_pos_BAD, \
846 # define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \
847 { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \
848 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (_IO_FILE *) CHAIN, FD, \
849 0, _IO_pos_BAD, 0, 0, { 0 }, 0, _IO_pos_BAD, \
855 #define _IO_va_start(args, last) va_start(args, last)
857 extern struct _IO_fake_stdiobuf _IO_stdin_buf, _IO_stdout_buf, _IO_stderr_buf;
860 # define COERCE_FILE(FILE) /* Nothing */
862 /* This is part of the kludge for binary compatibility with old stdio. */
863 # define COERCE_FILE(FILE) \
864 (((FILE)->_IO_file_flags & _IO_MAGIC_MASK) == _OLD_MAGIC_MASK \
865 && (FILE) = *(FILE**)&((int*)fp)[1])
869 # define MAYBE_SET_EINVAL __set_errno (EINVAL)
871 # define MAYBE_SET_EINVAL /* nothing */
875 # define CHECK_FILE(FILE, RET) \
876 if ((FILE) == NULL) { MAYBE_SET_EINVAL; return RET; } \
877 else { COERCE_FILE(FILE); \
878 if (((FILE)->_IO_file_flags & _IO_MAGIC_MASK) != _IO_MAGIC) \
879 { MAYBE_SET_EINVAL; return RET; }}
881 # define CHECK_FILE(FILE, RET) COERCE_FILE (FILE)
885 __attribute__ ((__always_inline__))
886 _IO_acquire_lock_fct (_IO_FILE **p)
889 if ((fp->_flags & _IO_USER_LOCK) == 0)
890 _IO_funlockfile (fp);
894 __attribute__ ((__always_inline__))
895 _IO_acquire_lock_clear_flags2_fct (_IO_FILE **p)
898 fp->_flags2 &= ~(_IO_FLAGS2_FORTIFY | _IO_FLAGS2_SCANF_STD);
899 if ((fp->_flags & _IO_USER_LOCK) == 0)
900 _IO_funlockfile (fp);
903 #if !defined _IO_MTSAFE_IO && !defined NOT_IN_libc
904 # define _IO_acquire_lock(_fp) \
906 _IO_FILE *_IO_acquire_lock_file = NULL
907 # define _IO_acquire_lock_clear_flags2(_fp) \
909 _IO_FILE *_IO_acquire_lock_file = (_fp)
910 # define _IO_release_lock(_fp) \
911 if (_IO_acquire_lock_file != NULL) \
912 _IO_acquire_lock_file->_flags2 &= ~(_IO_FLAGS2_FORTIFY \
913 | _IO_FLAGS2_SCANF_STD); \