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1 | /* Copyright (C) 1993-2019 Free Software Foundation, Inc. | |
2 | This file is part of the GNU C Library. | |
3 | ||
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. | |
8 | ||
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. | |
13 | ||
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/>. | |
17 | ||
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. */ | |
26 | ||
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. | |
32 | ||
33 | FIXME: All of the C++ cruft eventually needs to go away. */ | |
34 | ||
35 | #ifndef _LIBIOP_H | |
36 | #define _LIBIOP_H 1 | |
37 | ||
38 | #include <stddef.h> | |
39 | ||
40 | #include <errno.h> | |
41 | #include <libc-lock.h> | |
42 | ||
43 | #include <math_ldbl_opt.h> | |
44 | ||
45 | #include <stdio.h> | |
46 | #include <libio/libio.h> | |
47 | #include "iolibio.h" | |
48 | ||
49 | #include <shlib-compat.h> | |
50 | ||
51 | /* For historical reasons this is the name of the sysdeps header that | |
52 | adjusts the libio configuration. */ | |
53 | #include <_G_config.h> | |
54 | ||
55 | #define _IO_seek_set 0 | |
56 | #define _IO_seek_cur 1 | |
57 | #define _IO_seek_end 2 | |
58 | ||
59 | /* THE JUMPTABLE FUNCTIONS. | |
60 | ||
61 | * The _IO_FILE type is used to implement the FILE type in GNU libc, | |
62 | * as well as the streambuf class in GNU iostreams for C++. | |
63 | * These are all the same, just used differently. | |
64 | * An _IO_FILE (or FILE) object is allows followed by a pointer to | |
65 | * a jump table (of pointers to functions). The pointer is accessed | |
66 | * with the _IO_JUMPS macro. The jump table has an eccentric format, | |
67 | * so as to be compatible with the layout of a C++ virtual function table. | |
68 | * (as implemented by g++). When a pointer to a streambuf object is | |
69 | * coerced to an (FILE*), then _IO_JUMPS on the result just | |
70 | * happens to point to the virtual function table of the streambuf. | |
71 | * Thus the _IO_JUMPS function table used for C stdio/libio does | |
72 | * double duty as the virtual function table for C++ streambuf. | |
73 | * | |
74 | * The entries in the _IO_JUMPS function table (and hence also the | |
75 | * virtual functions of a streambuf) are described below. | |
76 | * The first parameter of each function entry is the _IO_FILE/streambuf | |
77 | * object being acted on (i.e. the 'this' parameter). | |
78 | */ | |
79 | ||
80 | /* Setting this macro to 1 enables the use of the _vtable_offset bias | |
81 | in _IO_JUMPS_FUNCS, below. This is only needed for new-format | |
82 | _IO_FILE in libc that must support old binaries (see oldfileops.c). */ | |
83 | #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1) && !defined _IO_USE_OLD_IO_FILE | |
84 | # define _IO_JUMPS_OFFSET 1 | |
85 | #else | |
86 | # define _IO_JUMPS_OFFSET 0 | |
87 | #endif | |
88 | ||
89 | /* Type of MEMBER in struct type TYPE. */ | |
90 | #define _IO_MEMBER_TYPE(TYPE, MEMBER) __typeof__ (((TYPE){}).MEMBER) | |
91 | ||
92 | /* Essentially ((TYPE *) THIS)->MEMBER, but avoiding the aliasing | |
93 | violation in case THIS has a different pointer type. */ | |
94 | #define _IO_CAST_FIELD_ACCESS(THIS, TYPE, MEMBER) \ | |
95 | (*(_IO_MEMBER_TYPE (TYPE, MEMBER) *)(((char *) (THIS)) \ | |
96 | + offsetof(TYPE, MEMBER))) | |
97 | ||
98 | #define _IO_JUMPS(THIS) (THIS)->vtable | |
99 | #define _IO_JUMPS_FILE_plus(THIS) \ | |
100 | _IO_CAST_FIELD_ACCESS ((THIS), struct _IO_FILE_plus, vtable) | |
101 | #define _IO_WIDE_JUMPS(THIS) \ | |
102 | _IO_CAST_FIELD_ACCESS ((THIS), struct _IO_FILE, _wide_data)->_wide_vtable | |
103 | #define _IO_CHECK_WIDE(THIS) \ | |
104 | (_IO_CAST_FIELD_ACCESS ((THIS), struct _IO_FILE, _wide_data) != NULL) | |
105 | ||
106 | #if _IO_JUMPS_OFFSET | |
107 | # define _IO_JUMPS_FUNC(THIS) \ | |
108 | (IO_validate_vtable \ | |
109 | (*(struct _IO_jump_t **) ((void *) &_IO_JUMPS_FILE_plus (THIS) \ | |
110 | + (THIS)->_vtable_offset))) | |
111 | # define _IO_JUMPS_FUNC_UPDATE(THIS, VTABLE) \ | |
112 | (*(const struct _IO_jump_t **) ((void *) &_IO_JUMPS_FILE_plus (THIS) \ | |
113 | + (THIS)->_vtable_offset) = (VTABLE)) | |
114 | # define _IO_vtable_offset(THIS) (THIS)->_vtable_offset | |
115 | #else | |
116 | # define _IO_JUMPS_FUNC(THIS) (IO_validate_vtable (_IO_JUMPS_FILE_plus (THIS))) | |
117 | # define _IO_JUMPS_FUNC_UPDATE(THIS, VTABLE) \ | |
118 | (_IO_JUMPS_FILE_plus (THIS) = (VTABLE)) | |
119 | # define _IO_vtable_offset(THIS) 0 | |
120 | #endif | |
121 | #define _IO_WIDE_JUMPS_FUNC(THIS) _IO_WIDE_JUMPS(THIS) | |
122 | #define JUMP_FIELD(TYPE, NAME) TYPE NAME | |
123 | #define JUMP0(FUNC, THIS) (_IO_JUMPS_FUNC(THIS)->FUNC) (THIS) | |
124 | #define JUMP1(FUNC, THIS, X1) (_IO_JUMPS_FUNC(THIS)->FUNC) (THIS, X1) | |
125 | #define JUMP2(FUNC, THIS, X1, X2) (_IO_JUMPS_FUNC(THIS)->FUNC) (THIS, X1, X2) | |
126 | #define JUMP3(FUNC, THIS, X1,X2,X3) (_IO_JUMPS_FUNC(THIS)->FUNC) (THIS, X1,X2, X3) | |
127 | #define JUMP_INIT(NAME, VALUE) VALUE | |
128 | #define JUMP_INIT_DUMMY JUMP_INIT(dummy, 0), JUMP_INIT (dummy2, 0) | |
129 | ||
130 | #define WJUMP0(FUNC, THIS) (_IO_WIDE_JUMPS_FUNC(THIS)->FUNC) (THIS) | |
131 | #define WJUMP1(FUNC, THIS, X1) (_IO_WIDE_JUMPS_FUNC(THIS)->FUNC) (THIS, X1) | |
132 | #define WJUMP2(FUNC, THIS, X1, X2) (_IO_WIDE_JUMPS_FUNC(THIS)->FUNC) (THIS, X1, X2) | |
133 | #define WJUMP3(FUNC, THIS, X1,X2,X3) (_IO_WIDE_JUMPS_FUNC(THIS)->FUNC) (THIS, X1,X2, X3) | |
134 | ||
135 | /* The 'finish' function does any final cleaning up of an _IO_FILE object. | |
136 | It does not delete (free) it, but does everything else to finalize it. | |
137 | It matches the streambuf::~streambuf virtual destructor. */ | |
138 | typedef void (*_IO_finish_t) (FILE *, int); /* finalize */ | |
139 | #define _IO_FINISH(FP) JUMP1 (__finish, FP, 0) | |
140 | #define _IO_WFINISH(FP) WJUMP1 (__finish, FP, 0) | |
141 | ||
142 | /* The 'overflow' hook flushes the buffer. | |
143 | The second argument is a character, or EOF. | |
144 | It matches the streambuf::overflow virtual function. */ | |
145 | typedef int (*_IO_overflow_t) (FILE *, int); | |
146 | #define _IO_OVERFLOW(FP, CH) JUMP1 (__overflow, FP, CH) | |
147 | #define _IO_WOVERFLOW(FP, CH) WJUMP1 (__overflow, FP, CH) | |
148 | ||
149 | /* The 'underflow' hook tries to fills the get buffer. | |
150 | It returns the next character (as an unsigned char) or EOF. The next | |
151 | character remains in the get buffer, and the get position is not changed. | |
152 | It matches the streambuf::underflow virtual function. */ | |
153 | typedef int (*_IO_underflow_t) (FILE *); | |
154 | #define _IO_UNDERFLOW(FP) JUMP0 (__underflow, FP) | |
155 | #define _IO_WUNDERFLOW(FP) WJUMP0 (__underflow, FP) | |
156 | ||
157 | /* The 'uflow' hook returns the next character in the input stream | |
158 | (cast to unsigned char), and increments the read position; | |
159 | EOF is returned on failure. | |
160 | It matches the streambuf::uflow virtual function, which is not in the | |
161 | cfront implementation, but was added to C++ by the ANSI/ISO committee. */ | |
162 | #define _IO_UFLOW(FP) JUMP0 (__uflow, FP) | |
163 | #define _IO_WUFLOW(FP) WJUMP0 (__uflow, FP) | |
164 | ||
165 | /* The 'pbackfail' hook handles backing up. | |
166 | It matches the streambuf::pbackfail virtual function. */ | |
167 | typedef int (*_IO_pbackfail_t) (FILE *, int); | |
168 | #define _IO_PBACKFAIL(FP, CH) JUMP1 (__pbackfail, FP, CH) | |
169 | #define _IO_WPBACKFAIL(FP, CH) WJUMP1 (__pbackfail, FP, CH) | |
170 | ||
171 | /* The 'xsputn' hook writes upto N characters from buffer DATA. | |
172 | Returns EOF or the number of character actually written. | |
173 | It matches the streambuf::xsputn virtual function. */ | |
174 | typedef size_t (*_IO_xsputn_t) (FILE *FP, const void *DATA, | |
175 | size_t N); | |
176 | #define _IO_XSPUTN(FP, DATA, N) JUMP2 (__xsputn, FP, DATA, N) | |
177 | #define _IO_WXSPUTN(FP, DATA, N) WJUMP2 (__xsputn, FP, DATA, N) | |
178 | ||
179 | /* The 'xsgetn' hook reads upto N characters into buffer DATA. | |
180 | Returns the number of character actually read. | |
181 | It matches the streambuf::xsgetn virtual function. */ | |
182 | typedef size_t (*_IO_xsgetn_t) (FILE *FP, void *DATA, size_t N); | |
183 | #define _IO_XSGETN(FP, DATA, N) JUMP2 (__xsgetn, FP, DATA, N) | |
184 | #define _IO_WXSGETN(FP, DATA, N) WJUMP2 (__xsgetn, FP, DATA, N) | |
185 | ||
186 | /* The 'seekoff' hook moves the stream position to a new position | |
187 | relative to the start of the file (if DIR==0), the current position | |
188 | (MODE==1), or the end of the file (MODE==2). | |
189 | It matches the streambuf::seekoff virtual function. | |
190 | It is also used for the ANSI fseek function. */ | |
191 | typedef off64_t (*_IO_seekoff_t) (FILE *FP, off64_t OFF, int DIR, | |
192 | int MODE); | |
193 | #define _IO_SEEKOFF(FP, OFF, DIR, MODE) JUMP3 (__seekoff, FP, OFF, DIR, MODE) | |
194 | #define _IO_WSEEKOFF(FP, OFF, DIR, MODE) WJUMP3 (__seekoff, FP, OFF, DIR, MODE) | |
195 | ||
196 | /* The 'seekpos' hook also moves the stream position, | |
197 | but to an absolute position given by a fpos64_t (seekpos). | |
198 | It matches the streambuf::seekpos virtual function. | |
199 | It is also used for the ANSI fgetpos and fsetpos functions. */ | |
200 | /* The _IO_seek_cur and _IO_seek_end options are not allowed. */ | |
201 | typedef off64_t (*_IO_seekpos_t) (FILE *, off64_t, int); | |
202 | #define _IO_SEEKPOS(FP, POS, FLAGS) JUMP2 (__seekpos, FP, POS, FLAGS) | |
203 | #define _IO_WSEEKPOS(FP, POS, FLAGS) WJUMP2 (__seekpos, FP, POS, FLAGS) | |
204 | ||
205 | /* The 'setbuf' hook gives a buffer to the file. | |
206 | It matches the streambuf::setbuf virtual function. */ | |
207 | typedef FILE* (*_IO_setbuf_t) (FILE *, char *, ssize_t); | |
208 | #define _IO_SETBUF(FP, BUFFER, LENGTH) JUMP2 (__setbuf, FP, BUFFER, LENGTH) | |
209 | #define _IO_WSETBUF(FP, BUFFER, LENGTH) WJUMP2 (__setbuf, FP, BUFFER, LENGTH) | |
210 | ||
211 | /* The 'sync' hook attempts to synchronize the internal data structures | |
212 | of the file with the external state. | |
213 | It matches the streambuf::sync virtual function. */ | |
214 | typedef int (*_IO_sync_t) (FILE *); | |
215 | #define _IO_SYNC(FP) JUMP0 (__sync, FP) | |
216 | #define _IO_WSYNC(FP) WJUMP0 (__sync, FP) | |
217 | ||
218 | /* The 'doallocate' hook is used to tell the file to allocate a buffer. | |
219 | It matches the streambuf::doallocate virtual function, which is not | |
220 | in the ANSI/ISO C++ standard, but is part traditional implementations. */ | |
221 | typedef int (*_IO_doallocate_t) (FILE *); | |
222 | #define _IO_DOALLOCATE(FP) JUMP0 (__doallocate, FP) | |
223 | #define _IO_WDOALLOCATE(FP) WJUMP0 (__doallocate, FP) | |
224 | ||
225 | /* The following four hooks (sysread, syswrite, sysclose, sysseek, and | |
226 | sysstat) are low-level hooks specific to this implementation. | |
227 | There is no correspondence in the ANSI/ISO C++ standard library. | |
228 | The hooks basically correspond to the Unix system functions | |
229 | (read, write, close, lseek, and stat) except that a FILE* | |
230 | parameter is used instead of an integer file descriptor; the default | |
231 | implementation used for normal files just calls those functions. | |
232 | The advantage of overriding these functions instead of the higher-level | |
233 | ones (underflow, overflow etc) is that you can leave all the buffering | |
234 | higher-level functions. */ | |
235 | ||
236 | /* The 'sysread' hook is used to read data from the external file into | |
237 | an existing buffer. It generalizes the Unix read(2) function. | |
238 | It matches the streambuf::sys_read virtual function, which is | |
239 | specific to this implementation. */ | |
240 | typedef ssize_t (*_IO_read_t) (FILE *, void *, ssize_t); | |
241 | #define _IO_SYSREAD(FP, DATA, LEN) JUMP2 (__read, FP, DATA, LEN) | |
242 | #define _IO_WSYSREAD(FP, DATA, LEN) WJUMP2 (__read, FP, DATA, LEN) | |
243 | ||
244 | /* The 'syswrite' hook is used to write data from an existing buffer | |
245 | to an external file. It generalizes the Unix write(2) function. | |
246 | It matches the streambuf::sys_write virtual function, which is | |
247 | specific to this implementation. */ | |
248 | typedef ssize_t (*_IO_write_t) (FILE *, const void *, ssize_t); | |
249 | #define _IO_SYSWRITE(FP, DATA, LEN) JUMP2 (__write, FP, DATA, LEN) | |
250 | #define _IO_WSYSWRITE(FP, DATA, LEN) WJUMP2 (__write, FP, DATA, LEN) | |
251 | ||
252 | /* The 'sysseek' hook is used to re-position an external file. | |
253 | It generalizes the Unix lseek(2) function. | |
254 | It matches the streambuf::sys_seek virtual function, which is | |
255 | specific to this implementation. */ | |
256 | typedef off64_t (*_IO_seek_t) (FILE *, off64_t, int); | |
257 | #define _IO_SYSSEEK(FP, OFFSET, MODE) JUMP2 (__seek, FP, OFFSET, MODE) | |
258 | #define _IO_WSYSSEEK(FP, OFFSET, MODE) WJUMP2 (__seek, FP, OFFSET, MODE) | |
259 | ||
260 | /* The 'sysclose' hook is used to finalize (close, finish up) an | |
261 | external file. It generalizes the Unix close(2) function. | |
262 | It matches the streambuf::sys_close virtual function, which is | |
263 | specific to this implementation. */ | |
264 | typedef int (*_IO_close_t) (FILE *); /* finalize */ | |
265 | #define _IO_SYSCLOSE(FP) JUMP0 (__close, FP) | |
266 | #define _IO_WSYSCLOSE(FP) WJUMP0 (__close, FP) | |
267 | ||
268 | /* The 'sysstat' hook is used to get information about an external file | |
269 | into a struct stat buffer. It generalizes the Unix fstat(2) call. | |
270 | It matches the streambuf::sys_stat virtual function, which is | |
271 | specific to this implementation. */ | |
272 | typedef int (*_IO_stat_t) (FILE *, void *); | |
273 | #define _IO_SYSSTAT(FP, BUF) JUMP1 (__stat, FP, BUF) | |
274 | #define _IO_WSYSSTAT(FP, BUF) WJUMP1 (__stat, FP, BUF) | |
275 | ||
276 | /* The 'showmany' hook can be used to get an image how much input is | |
277 | available. In many cases the answer will be 0 which means unknown | |
278 | but some cases one can provide real information. */ | |
279 | typedef int (*_IO_showmanyc_t) (FILE *); | |
280 | #define _IO_SHOWMANYC(FP) JUMP0 (__showmanyc, FP) | |
281 | #define _IO_WSHOWMANYC(FP) WJUMP0 (__showmanyc, FP) | |
282 | ||
283 | /* The 'imbue' hook is used to get information about the currently | |
284 | installed locales. */ | |
285 | typedef void (*_IO_imbue_t) (FILE *, void *); | |
286 | #define _IO_IMBUE(FP, LOCALE) JUMP1 (__imbue, FP, LOCALE) | |
287 | #define _IO_WIMBUE(FP, LOCALE) WJUMP1 (__imbue, FP, LOCALE) | |
288 | ||
289 | ||
290 | #define _IO_CHAR_TYPE char /* unsigned char ? */ | |
291 | #define _IO_INT_TYPE int | |
292 | ||
293 | struct _IO_jump_t | |
294 | { | |
295 | JUMP_FIELD(size_t, __dummy); | |
296 | JUMP_FIELD(size_t, __dummy2); | |
297 | JUMP_FIELD(_IO_finish_t, __finish); | |
298 | JUMP_FIELD(_IO_overflow_t, __overflow); | |
299 | JUMP_FIELD(_IO_underflow_t, __underflow); | |
300 | JUMP_FIELD(_IO_underflow_t, __uflow); | |
301 | JUMP_FIELD(_IO_pbackfail_t, __pbackfail); | |
302 | /* showmany */ | |
303 | JUMP_FIELD(_IO_xsputn_t, __xsputn); | |
304 | JUMP_FIELD(_IO_xsgetn_t, __xsgetn); | |
305 | JUMP_FIELD(_IO_seekoff_t, __seekoff); | |
306 | JUMP_FIELD(_IO_seekpos_t, __seekpos); | |
307 | JUMP_FIELD(_IO_setbuf_t, __setbuf); | |
308 | JUMP_FIELD(_IO_sync_t, __sync); | |
309 | JUMP_FIELD(_IO_doallocate_t, __doallocate); | |
310 | JUMP_FIELD(_IO_read_t, __read); | |
311 | JUMP_FIELD(_IO_write_t, __write); | |
312 | JUMP_FIELD(_IO_seek_t, __seek); | |
313 | JUMP_FIELD(_IO_close_t, __close); | |
314 | JUMP_FIELD(_IO_stat_t, __stat); | |
315 | JUMP_FIELD(_IO_showmanyc_t, __showmanyc); | |
316 | JUMP_FIELD(_IO_imbue_t, __imbue); | |
317 | }; | |
318 | ||
319 | /* We always allocate an extra word following an _IO_FILE. | |
320 | This contains a pointer to the function jump table used. | |
321 | This is for compatibility with C++ streambuf; the word can | |
322 | be used to smash to a pointer to a virtual function table. */ | |
323 | ||
324 | struct _IO_FILE_plus | |
325 | { | |
326 | FILE file; | |
327 | const struct _IO_jump_t *vtable; | |
328 | }; | |
329 | ||
330 | #ifdef _IO_USE_OLD_IO_FILE | |
331 | /* This structure is used by the compatibility code as if it were an | |
332 | _IO_FILE_plus, but has enough space to initialize the _mode argument | |
333 | of an _IO_FILE_complete. */ | |
334 | struct _IO_FILE_complete_plus | |
335 | { | |
336 | struct _IO_FILE_complete file; | |
337 | const struct _IO_jump_t *vtable; | |
338 | }; | |
339 | #endif | |
340 | ||
341 | /* Special file type for fopencookie function. */ | |
342 | struct _IO_cookie_file | |
343 | { | |
344 | struct _IO_FILE_plus __fp; | |
345 | void *__cookie; | |
346 | cookie_io_functions_t __io_functions; | |
347 | }; | |
348 | ||
349 | FILE *_IO_fopencookie (void *cookie, const char *mode, | |
350 | cookie_io_functions_t io_functions); | |
351 | ||
352 | ||
353 | /* Iterator type for walking global linked list of _IO_FILE objects. */ | |
354 | ||
355 | typedef FILE *_IO_ITER; | |
356 | ||
357 | /* Generic functions */ | |
358 | ||
359 | extern void _IO_switch_to_main_get_area (FILE *) __THROW; | |
360 | extern void _IO_switch_to_backup_area (FILE *) __THROW; | |
361 | extern int _IO_switch_to_get_mode (FILE *); | |
362 | libc_hidden_proto (_IO_switch_to_get_mode) | |
363 | extern void _IO_init_internal (FILE *, int) attribute_hidden; | |
364 | extern int _IO_sputbackc (FILE *, int) __THROW; | |
365 | libc_hidden_proto (_IO_sputbackc) | |
366 | extern int _IO_sungetc (FILE *) __THROW; | |
367 | extern void _IO_un_link (struct _IO_FILE_plus *) __THROW; | |
368 | libc_hidden_proto (_IO_un_link) | |
369 | extern void _IO_link_in (struct _IO_FILE_plus *) __THROW; | |
370 | libc_hidden_proto (_IO_link_in) | |
371 | extern void _IO_doallocbuf (FILE *) __THROW; | |
372 | libc_hidden_proto (_IO_doallocbuf) | |
373 | extern void _IO_unsave_markers (FILE *) __THROW; | |
374 | libc_hidden_proto (_IO_unsave_markers) | |
375 | extern void _IO_setb (FILE *, char *, char *, int) __THROW; | |
376 | libc_hidden_proto (_IO_setb) | |
377 | extern unsigned _IO_adjust_column (unsigned, const char *, int) __THROW; | |
378 | libc_hidden_proto (_IO_adjust_column) | |
379 | #define _IO_sputn(__fp, __s, __n) _IO_XSPUTN (__fp, __s, __n) | |
380 | ||
381 | ssize_t _IO_least_wmarker (FILE *, wchar_t *) __THROW; | |
382 | libc_hidden_proto (_IO_least_wmarker) | |
383 | extern void _IO_switch_to_main_wget_area (FILE *) __THROW; | |
384 | libc_hidden_proto (_IO_switch_to_main_wget_area) | |
385 | extern void _IO_switch_to_wbackup_area (FILE *) __THROW; | |
386 | libc_hidden_proto (_IO_switch_to_wbackup_area) | |
387 | extern int _IO_switch_to_wget_mode (FILE *); | |
388 | libc_hidden_proto (_IO_switch_to_wget_mode) | |
389 | extern void _IO_wsetb (FILE *, wchar_t *, wchar_t *, int) __THROW; | |
390 | libc_hidden_proto (_IO_wsetb) | |
391 | extern wint_t _IO_sputbackwc (FILE *, wint_t) __THROW; | |
392 | libc_hidden_proto (_IO_sputbackwc) | |
393 | extern wint_t _IO_sungetwc (FILE *) __THROW; | |
394 | extern void _IO_wdoallocbuf (FILE *) __THROW; | |
395 | libc_hidden_proto (_IO_wdoallocbuf) | |
396 | extern void _IO_unsave_wmarkers (FILE *) __THROW; | |
397 | extern unsigned _IO_adjust_wcolumn (unsigned, const wchar_t *, int) __THROW; | |
398 | extern off64_t get_file_offset (FILE *fp); | |
399 | ||
400 | /* Marker-related function. */ | |
401 | ||
402 | extern void _IO_init_marker (struct _IO_marker *, FILE *); | |
403 | extern void _IO_init_wmarker (struct _IO_marker *, FILE *); | |
404 | extern void _IO_remove_marker (struct _IO_marker *) __THROW; | |
405 | extern int _IO_marker_difference (struct _IO_marker *, struct _IO_marker *) | |
406 | __THROW; | |
407 | extern int _IO_marker_delta (struct _IO_marker *) __THROW; | |
408 | extern int _IO_wmarker_delta (struct _IO_marker *) __THROW; | |
409 | extern int _IO_seekmark (FILE *, struct _IO_marker *, int) __THROW; | |
410 | extern int _IO_seekwmark (FILE *, struct _IO_marker *, int) __THROW; | |
411 | ||
412 | /* Functions for iterating global list and dealing with its lock */ | |
413 | ||
414 | extern _IO_ITER _IO_iter_begin (void) __THROW; | |
415 | libc_hidden_proto (_IO_iter_begin) | |
416 | extern _IO_ITER _IO_iter_end (void) __THROW; | |
417 | libc_hidden_proto (_IO_iter_end) | |
418 | extern _IO_ITER _IO_iter_next (_IO_ITER) __THROW; | |
419 | libc_hidden_proto (_IO_iter_next) | |
420 | extern FILE *_IO_iter_file (_IO_ITER) __THROW; | |
421 | libc_hidden_proto (_IO_iter_file) | |
422 | extern void _IO_list_lock (void) __THROW; | |
423 | libc_hidden_proto (_IO_list_lock) | |
424 | extern void _IO_list_unlock (void) __THROW; | |
425 | libc_hidden_proto (_IO_list_unlock) | |
426 | extern void _IO_list_resetlock (void) __THROW; | |
427 | libc_hidden_proto (_IO_list_resetlock) | |
428 | extern void _IO_enable_locks (void) __THROW; | |
429 | libc_hidden_proto (_IO_enable_locks) | |
430 | ||
431 | /* Default jumptable functions. */ | |
432 | ||
433 | extern int _IO_default_underflow (FILE *) __THROW; | |
434 | extern int _IO_default_uflow (FILE *); | |
435 | libc_hidden_proto (_IO_default_uflow) | |
436 | extern wint_t _IO_wdefault_uflow (FILE *); | |
437 | libc_hidden_proto (_IO_wdefault_uflow) | |
438 | extern int _IO_default_doallocate (FILE *) __THROW; | |
439 | libc_hidden_proto (_IO_default_doallocate) | |
440 | extern int _IO_wdefault_doallocate (FILE *) __THROW; | |
441 | libc_hidden_proto (_IO_wdefault_doallocate) | |
442 | extern void _IO_default_finish (FILE *, int) __THROW; | |
443 | libc_hidden_proto (_IO_default_finish) | |
444 | extern void _IO_wdefault_finish (FILE *, int) __THROW; | |
445 | libc_hidden_proto (_IO_wdefault_finish) | |
446 | extern int _IO_default_pbackfail (FILE *, int) __THROW; | |
447 | libc_hidden_proto (_IO_default_pbackfail) | |
448 | extern wint_t _IO_wdefault_pbackfail (FILE *, wint_t) __THROW; | |
449 | libc_hidden_proto (_IO_wdefault_pbackfail) | |
450 | extern FILE* _IO_default_setbuf (FILE *, char *, ssize_t); | |
451 | extern size_t _IO_default_xsputn (FILE *, const void *, size_t); | |
452 | libc_hidden_proto (_IO_default_xsputn) | |
453 | extern size_t _IO_wdefault_xsputn (FILE *, const void *, size_t); | |
454 | libc_hidden_proto (_IO_wdefault_xsputn) | |
455 | extern size_t _IO_default_xsgetn (FILE *, void *, size_t); | |
456 | libc_hidden_proto (_IO_default_xsgetn) | |
457 | extern size_t _IO_wdefault_xsgetn (FILE *, void *, size_t); | |
458 | libc_hidden_proto (_IO_wdefault_xsgetn) | |
459 | extern off64_t _IO_default_seekoff (FILE *, off64_t, int, int) | |
460 | __THROW; | |
461 | extern off64_t _IO_default_seekpos (FILE *, off64_t, int); | |
462 | extern ssize_t _IO_default_write (FILE *, const void *, ssize_t); | |
463 | extern ssize_t _IO_default_read (FILE *, void *, ssize_t); | |
464 | extern int _IO_default_stat (FILE *, void *) __THROW; | |
465 | extern off64_t _IO_default_seek (FILE *, off64_t, int) __THROW; | |
466 | extern int _IO_default_sync (FILE *) __THROW; | |
467 | #define _IO_default_close ((_IO_close_t) _IO_default_sync) | |
468 | extern int _IO_default_showmanyc (FILE *) __THROW; | |
469 | extern void _IO_default_imbue (FILE *, void *) __THROW; | |
470 | ||
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 int _IO_do_write (FILE *, const char *, size_t); | |
485 | libc_hidden_proto (_IO_do_write) | |
486 | extern int _IO_new_do_write (FILE *, const char *, size_t); | |
487 | extern int _IO_old_do_write (FILE *, const char *, size_t); | |
488 | extern int _IO_wdo_write (FILE *, const wchar_t *, size_t); | |
489 | libc_hidden_proto (_IO_wdo_write) | |
490 | extern int _IO_flush_all_lockp (int); | |
491 | extern int _IO_flush_all (void); | |
492 | libc_hidden_proto (_IO_flush_all) | |
493 | extern int _IO_cleanup (void); | |
494 | extern void _IO_flush_all_linebuffered (void); | |
495 | libc_hidden_proto (_IO_flush_all_linebuffered) | |
496 | extern int _IO_new_fgetpos (FILE *, __fpos_t *); | |
497 | extern int _IO_old_fgetpos (FILE *, __fpos_t *); | |
498 | extern int _IO_new_fsetpos (FILE *, const __fpos_t *); | |
499 | extern int _IO_old_fsetpos (FILE *, const __fpos_t *); | |
500 | extern int _IO_new_fgetpos64 (FILE *, __fpos64_t *); | |
501 | extern int _IO_old_fgetpos64 (FILE *, __fpos64_t *); | |
502 | extern int _IO_new_fsetpos64 (FILE *, const __fpos64_t *); | |
503 | extern int _IO_old_fsetpos64 (FILE *, const __fpos64_t *); | |
504 | extern void _IO_old_init (FILE *fp, int flags) __THROW; | |
505 | ||
506 | ||
507 | #define _IO_do_flush(_f) \ | |
508 | ((_f)->_mode <= 0 \ | |
509 | ? _IO_do_write(_f, (_f)->_IO_write_base, \ | |
510 | (_f)->_IO_write_ptr-(_f)->_IO_write_base) \ | |
511 | : _IO_wdo_write(_f, (_f)->_wide_data->_IO_write_base, \ | |
512 | ((_f)->_wide_data->_IO_write_ptr \ | |
513 | - (_f)->_wide_data->_IO_write_base))) | |
514 | #define _IO_old_do_flush(_f) \ | |
515 | _IO_old_do_write(_f, (_f)->_IO_write_base, \ | |
516 | (_f)->_IO_write_ptr-(_f)->_IO_write_base) | |
517 | #define _IO_in_put_mode(_fp) ((_fp)->_flags & _IO_CURRENTLY_PUTTING) | |
518 | #define _IO_mask_flags(fp, f, mask) \ | |
519 | ((fp)->_flags = ((fp)->_flags & ~(mask)) | ((f) & (mask))) | |
520 | #define _IO_setg(fp, eb, g, eg) ((fp)->_IO_read_base = (eb),\ | |
521 | (fp)->_IO_read_ptr = (g), (fp)->_IO_read_end = (eg)) | |
522 | #define _IO_wsetg(fp, eb, g, eg) ((fp)->_wide_data->_IO_read_base = (eb),\ | |
523 | (fp)->_wide_data->_IO_read_ptr = (g), \ | |
524 | (fp)->_wide_data->_IO_read_end = (eg)) | |
525 | #define _IO_setp(__fp, __p, __ep) \ | |
526 | ((__fp)->_IO_write_base = (__fp)->_IO_write_ptr \ | |
527 | = __p, (__fp)->_IO_write_end = (__ep)) | |
528 | #define _IO_wsetp(__fp, __p, __ep) \ | |
529 | ((__fp)->_wide_data->_IO_write_base \ | |
530 | = (__fp)->_wide_data->_IO_write_ptr = __p, \ | |
531 | (__fp)->_wide_data->_IO_write_end = (__ep)) | |
532 | #define _IO_have_backup(fp) ((fp)->_IO_save_base != NULL) | |
533 | #define _IO_have_wbackup(fp) ((fp)->_wide_data->_IO_save_base != NULL) | |
534 | #define _IO_in_backup(fp) ((fp)->_flags & _IO_IN_BACKUP) | |
535 | #define _IO_have_markers(fp) ((fp)->_markers != NULL) | |
536 | #define _IO_blen(fp) ((fp)->_IO_buf_end - (fp)->_IO_buf_base) | |
537 | #define _IO_wblen(fp) ((fp)->_wide_data->_IO_buf_end \ | |
538 | - (fp)->_wide_data->_IO_buf_base) | |
539 | ||
540 | /* Jumptable functions for files. */ | |
541 | ||
542 | extern int _IO_file_doallocate (FILE *) __THROW; | |
543 | libc_hidden_proto (_IO_file_doallocate) | |
544 | extern FILE* _IO_file_setbuf (FILE *, char *, ssize_t); | |
545 | libc_hidden_proto (_IO_file_setbuf) | |
546 | extern off64_t _IO_file_seekoff (FILE *, off64_t, int, int); | |
547 | libc_hidden_proto (_IO_file_seekoff) | |
548 | extern off64_t _IO_file_seekoff_mmap (FILE *, off64_t, int, int) | |
549 | __THROW; | |
550 | extern size_t _IO_file_xsputn (FILE *, const void *, size_t); | |
551 | libc_hidden_proto (_IO_file_xsputn) | |
552 | extern size_t _IO_file_xsgetn (FILE *, void *, size_t); | |
553 | libc_hidden_proto (_IO_file_xsgetn) | |
554 | extern int _IO_file_stat (FILE *, void *) __THROW; | |
555 | libc_hidden_proto (_IO_file_stat) | |
556 | extern int _IO_file_close (FILE *) __THROW; | |
557 | libc_hidden_proto (_IO_file_close) | |
558 | extern int _IO_file_close_mmap (FILE *) __THROW; | |
559 | extern int _IO_file_underflow (FILE *); | |
560 | libc_hidden_proto (_IO_file_underflow) | |
561 | extern int _IO_file_underflow_mmap (FILE *); | |
562 | extern int _IO_file_underflow_maybe_mmap (FILE *); | |
563 | extern int _IO_file_overflow (FILE *, int); | |
564 | libc_hidden_proto (_IO_file_overflow) | |
565 | #define _IO_file_is_open(__fp) ((__fp)->_fileno != -1) | |
566 | extern FILE* _IO_file_attach (FILE *, int); | |
567 | libc_hidden_proto (_IO_file_attach) | |
568 | extern FILE* _IO_file_open (FILE *, const char *, int, int, int, int); | |
569 | libc_hidden_proto (_IO_file_open) | |
570 | extern FILE* _IO_file_fopen (FILE *, const char *, const char *, int); | |
571 | libc_hidden_proto (_IO_file_fopen) | |
572 | extern ssize_t _IO_file_write (FILE *, const void *, ssize_t); | |
573 | extern ssize_t _IO_file_read (FILE *, void *, ssize_t); | |
574 | libc_hidden_proto (_IO_file_read) | |
575 | extern int _IO_file_sync (FILE *); | |
576 | libc_hidden_proto (_IO_file_sync) | |
577 | extern int _IO_file_close_it (FILE *); | |
578 | libc_hidden_proto (_IO_file_close_it) | |
579 | extern off64_t _IO_file_seek (FILE *, off64_t, int) __THROW; | |
580 | libc_hidden_proto (_IO_file_seek) | |
581 | extern void _IO_file_finish (FILE *, int); | |
582 | libc_hidden_proto (_IO_file_finish) | |
583 | ||
584 | extern FILE* _IO_new_file_attach (FILE *, int); | |
585 | extern int _IO_new_file_close_it (FILE *); | |
586 | extern void _IO_new_file_finish (FILE *, int); | |
587 | extern FILE* _IO_new_file_fopen (FILE *, const char *, const char *, | |
588 | int); | |
589 | extern void _IO_no_init (FILE *, int, int, struct _IO_wide_data *, | |
590 | const struct _IO_jump_t *) __THROW; | |
591 | extern void _IO_new_file_init_internal (struct _IO_FILE_plus *) | |
592 | __THROW attribute_hidden; | |
593 | extern FILE* _IO_new_file_setbuf (FILE *, char *, ssize_t); | |
594 | extern FILE* _IO_file_setbuf_mmap (FILE *, char *, ssize_t); | |
595 | extern int _IO_new_file_sync (FILE *); | |
596 | extern int _IO_new_file_underflow (FILE *); | |
597 | extern int _IO_new_file_overflow (FILE *, int); | |
598 | extern off64_t _IO_new_file_seekoff (FILE *, off64_t, int, int); | |
599 | extern ssize_t _IO_new_file_write (FILE *, const void *, ssize_t); | |
600 | extern size_t _IO_new_file_xsputn (FILE *, const void *, size_t); | |
601 | ||
602 | extern FILE* _IO_old_file_setbuf (FILE *, char *, ssize_t); | |
603 | extern off64_t _IO_old_file_seekoff (FILE *, off64_t, int, int); | |
604 | extern size_t _IO_old_file_xsputn (FILE *, const void *, size_t); | |
605 | extern int _IO_old_file_underflow (FILE *); | |
606 | extern int _IO_old_file_overflow (FILE *, int); | |
607 | extern void _IO_old_file_init_internal (struct _IO_FILE_plus *) | |
608 | __THROW attribute_hidden; | |
609 | extern FILE* _IO_old_file_attach (FILE *, int); | |
610 | extern FILE* _IO_old_file_fopen (FILE *, const char *, const char *); | |
611 | extern ssize_t _IO_old_file_write (FILE *, const void *, ssize_t); | |
612 | extern int _IO_old_file_sync (FILE *); | |
613 | extern int _IO_old_file_close_it (FILE *); | |
614 | extern void _IO_old_file_finish (FILE *, int); | |
615 | ||
616 | extern int _IO_wfile_doallocate (FILE *) __THROW; | |
617 | extern size_t _IO_wfile_xsputn (FILE *, const void *, size_t); | |
618 | libc_hidden_proto (_IO_wfile_xsputn) | |
619 | extern FILE* _IO_wfile_setbuf (FILE *, wchar_t *, ssize_t); | |
620 | extern wint_t _IO_wfile_sync (FILE *); | |
621 | libc_hidden_proto (_IO_wfile_sync) | |
622 | extern wint_t _IO_wfile_underflow (FILE *); | |
623 | libc_hidden_proto (_IO_wfile_underflow) | |
624 | extern wint_t _IO_wfile_overflow (FILE *, wint_t); | |
625 | libc_hidden_proto (_IO_wfile_overflow) | |
626 | extern off64_t _IO_wfile_seekoff (FILE *, off64_t, int, int); | |
627 | libc_hidden_proto (_IO_wfile_seekoff) | |
628 | ||
629 | /* Jumptable functions for proc_files. */ | |
630 | extern FILE* _IO_proc_open (FILE *, const char *, const char *) | |
631 | __THROW; | |
632 | extern FILE* _IO_new_proc_open (FILE *, const char *, const char *) | |
633 | __THROW; | |
634 | extern FILE* _IO_old_proc_open (FILE *, const char *, const char *); | |
635 | extern int _IO_proc_close (FILE *) __THROW; | |
636 | extern int _IO_new_proc_close (FILE *) __THROW; | |
637 | extern int _IO_old_proc_close (FILE *); | |
638 | ||
639 | /* Jumptable functions for strfiles. */ | |
640 | extern int _IO_str_underflow (FILE *) __THROW; | |
641 | libc_hidden_proto (_IO_str_underflow) | |
642 | extern int _IO_str_overflow (FILE *, int) __THROW; | |
643 | libc_hidden_proto (_IO_str_overflow) | |
644 | extern int _IO_str_pbackfail (FILE *, int) __THROW; | |
645 | libc_hidden_proto (_IO_str_pbackfail) | |
646 | extern off64_t _IO_str_seekoff (FILE *, off64_t, int, int) __THROW; | |
647 | libc_hidden_proto (_IO_str_seekoff) | |
648 | extern void _IO_str_finish (FILE *, int) __THROW; | |
649 | ||
650 | /* Other strfile functions */ | |
651 | struct _IO_strfile_; | |
652 | extern ssize_t _IO_str_count (FILE *) __THROW; | |
653 | ||
654 | /* And the wide character versions. */ | |
655 | extern void _IO_wstr_init_static (FILE *, wchar_t *, size_t, wchar_t *) | |
656 | __THROW; | |
657 | extern ssize_t _IO_wstr_count (FILE *) __THROW; | |
658 | extern wint_t _IO_wstr_overflow (FILE *, wint_t) __THROW; | |
659 | extern wint_t _IO_wstr_underflow (FILE *) __THROW; | |
660 | extern off64_t _IO_wstr_seekoff (FILE *, off64_t, int, int) | |
661 | __THROW; | |
662 | extern wint_t _IO_wstr_pbackfail (FILE *, wint_t) __THROW; | |
663 | extern void _IO_wstr_finish (FILE *, int) __THROW; | |
664 | ||
665 | /* Internal versions of v*printf that take an additional flags | |
666 | parameter. */ | |
667 | extern int __vfprintf_internal (FILE *fp, const char *format, va_list ap, | |
668 | unsigned int mode_flags) | |
669 | attribute_hidden; | |
670 | extern int __vfwprintf_internal (FILE *fp, const wchar_t *format, va_list ap, | |
671 | unsigned int mode_flags) | |
672 | attribute_hidden; | |
673 | ||
674 | extern int __vasprintf_internal (char **result_ptr, const char *format, | |
675 | va_list ap, unsigned int mode_flags) | |
676 | attribute_hidden; | |
677 | extern int __vdprintf_internal (int d, const char *format, va_list ap, | |
678 | unsigned int mode_flags) | |
679 | attribute_hidden; | |
680 | extern int __obstack_vprintf_internal (struct obstack *ob, const char *fmt, | |
681 | va_list ap, unsigned int mode_flags) | |
682 | attribute_hidden; | |
683 | ||
684 | /* Note: __vsprintf_internal, unlike vsprintf, does take a maxlen argument, | |
685 | because it's called by both vsprintf and vsprintf_chk. If maxlen is | |
686 | not set to -1, overrunning the buffer will cause a prompt crash. | |
687 | This is the behavior of ordinary (v)sprintf functions, thus they call | |
688 | __vsprintf_internal with that argument set to -1. */ | |
689 | extern int __vsprintf_internal (char *string, size_t maxlen, | |
690 | const char *format, va_list ap, | |
691 | unsigned int mode_flags) | |
692 | attribute_hidden; | |
693 | ||
694 | extern int __vsnprintf_internal (char *string, size_t maxlen, | |
695 | const char *format, va_list ap, | |
696 | unsigned int mode_flags) | |
697 | attribute_hidden; | |
698 | extern int __vswprintf_internal (wchar_t *string, size_t maxlen, | |
699 | const wchar_t *format, va_list ap, | |
700 | unsigned int mode_flags) | |
701 | attribute_hidden; | |
702 | ||
703 | /* Flags for __v*printf_internal. | |
704 | ||
705 | PRINTF_LDBL_IS_DBL indicates whether long double values are to be | |
706 | handled as having the same format as double, in which case the flag | |
707 | should be set to one, or as another format, otherwise. | |
708 | ||
709 | PRINTF_FORTIFY, when set to one, indicates that fortification checks | |
710 | are to be performed in input parameters. This is used by the | |
711 | __*printf_chk functions, which are used when _FORTIFY_SOURCE is | |
712 | defined to 1 or 2. Otherwise, such checks are ignored. | |
713 | ||
714 | PRINTF_CHK indicates, to the internal function being called, that the | |
715 | call is originated from one of the __*printf_chk functions. */ | |
716 | #define PRINTF_LDBL_IS_DBL 0x0001 | |
717 | #define PRINTF_FORTIFY 0x0002 | |
718 | #define PRINTF_CHK 0x0004 | |
719 | ||
720 | extern size_t _IO_getline (FILE *,char *, size_t, int, int); | |
721 | libc_hidden_proto (_IO_getline) | |
722 | extern size_t _IO_getline_info (FILE *,char *, size_t, | |
723 | int, int, int *); | |
724 | libc_hidden_proto (_IO_getline_info) | |
725 | extern ssize_t _IO_getdelim (char **, size_t *, int, FILE *); | |
726 | extern size_t _IO_getwline (FILE *,wchar_t *, size_t, wint_t, int); | |
727 | extern size_t _IO_getwline_info (FILE *,wchar_t *, size_t, | |
728 | wint_t, int, wint_t *); | |
729 | ||
730 | extern struct _IO_FILE_plus *_IO_list_all; | |
731 | libc_hidden_proto (_IO_list_all) | |
732 | extern void (*_IO_cleanup_registration_needed) (void); | |
733 | ||
734 | extern void _IO_str_init_static_internal (struct _IO_strfile_ *, char *, | |
735 | size_t, char *) __THROW; | |
736 | extern off64_t _IO_seekoff_unlocked (FILE *, off64_t, int, int) | |
737 | attribute_hidden; | |
738 | extern off64_t _IO_seekpos_unlocked (FILE *, off64_t, int) | |
739 | attribute_hidden; | |
740 | ||
741 | #if _G_HAVE_MMAP | |
742 | ||
743 | # include <unistd.h> | |
744 | # include <fcntl.h> | |
745 | # include <sys/mman.h> | |
746 | # include <sys/param.h> | |
747 | ||
748 | # if !defined(MAP_ANONYMOUS) && defined(MAP_ANON) | |
749 | # define MAP_ANONYMOUS MAP_ANON | |
750 | # endif | |
751 | ||
752 | # if !defined(MAP_ANONYMOUS) || !defined(EXEC_PAGESIZE) | |
753 | # undef _G_HAVE_MMAP | |
754 | # define _G_HAVE_MMAP 0 | |
755 | # endif | |
756 | ||
757 | #endif /* _G_HAVE_MMAP */ | |
758 | ||
759 | /* Flags for __vfscanf_internal and __vfwscanf_internal. | |
760 | ||
761 | SCANF_LDBL_IS_DBL indicates whether long double values are to be | |
762 | handled as having the same format as double, in which case the flag | |
763 | should be set to one, or as another format, otherwise. | |
764 | ||
765 | SCANF_ISOC99_A, when set to one, indicates that the ISO C99 or POSIX | |
766 | behavior of the scanf functions is to be used, i.e. automatic | |
767 | allocation for input strings with %as, %aS and %a[, a GNU extension, | |
768 | is disabled. This is the behavior that the __isoc99_scanf family of | |
769 | functions use. When the flag is set to zero, automatic allocation is | |
770 | enabled. | |
771 | ||
772 | SCANF_LDBL_USES_FLOAT128 is used on platforms where the long double | |
773 | format used to be different from the IEC 60559 double format *and* | |
774 | also different from the Quadruple 128-bits IEC 60559 format (such as | |
775 | the IBM Extended Precision format on powerpc or the 80-bits IEC 60559 | |
776 | format on x86), but was later converted to the Quadruple 128-bits IEC | |
777 | 60559 format, which is the same format that the _Float128 always has | |
778 | (hence the `USES_FLOAT128' suffix in the name of the flag). When set | |
779 | to one, this macros indicates that long double values are to be | |
780 | handled as having this new format. Otherwise, they should be handled | |
781 | as the previous format on that platform. */ | |
782 | #define SCANF_LDBL_IS_DBL 0x0001 | |
783 | #define SCANF_ISOC99_A 0x0002 | |
784 | #define SCANF_LDBL_USES_FLOAT128 0x0004 | |
785 | ||
786 | extern int __vfscanf_internal (FILE *fp, const char *format, va_list argp, | |
787 | unsigned int flags) | |
788 | attribute_hidden; | |
789 | extern int __vfwscanf_internal (FILE *fp, const wchar_t *format, va_list argp, | |
790 | unsigned int flags) | |
791 | attribute_hidden; | |
792 | ||
793 | extern int _IO_vscanf (const char *, va_list) __THROW; | |
794 | ||
795 | #ifdef _IO_MTSAFE_IO | |
796 | /* check following! */ | |
797 | # ifdef _IO_USE_OLD_IO_FILE | |
798 | # define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \ | |
799 | { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \ | |
800 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (FILE *) CHAIN, FD, \ | |
801 | 0, _IO_pos_BAD, 0, 0, { 0 }, &_IO_stdfile_##FD##_lock } | |
802 | # else | |
803 | # define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \ | |
804 | { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \ | |
805 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (FILE *) CHAIN, FD, \ | |
806 | 0, _IO_pos_BAD, 0, 0, { 0 }, &_IO_stdfile_##FD##_lock, _IO_pos_BAD,\ | |
807 | NULL, WDP, 0 } | |
808 | # endif | |
809 | #else | |
810 | # ifdef _IO_USE_OLD_IO_FILE | |
811 | # define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \ | |
812 | { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \ | |
813 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (FILE *) CHAIN, FD, \ | |
814 | 0, _IO_pos_BAD } | |
815 | # else | |
816 | # define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \ | |
817 | { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \ | |
818 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (FILE *) CHAIN, FD, \ | |
819 | 0, _IO_pos_BAD, 0, 0, { 0 }, 0, _IO_pos_BAD, \ | |
820 | NULL, WDP, 0 } | |
821 | # endif | |
822 | #endif | |
823 | ||
824 | #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1) | |
825 | /* See oldstdfiles.c. These are the old stream variables. */ | |
826 | extern struct _IO_FILE_plus _IO_stdin_; | |
827 | extern struct _IO_FILE_plus _IO_stdout_; | |
828 | extern struct _IO_FILE_plus _IO_stderr_; | |
829 | ||
830 | static inline bool | |
831 | _IO_legacy_file (FILE *fp) | |
832 | { | |
833 | return fp == (FILE *) &_IO_stdin_ || fp == (FILE *) &_IO_stdout_ | |
834 | || fp == (FILE *) &_IO_stderr_; | |
835 | } | |
836 | #endif | |
837 | ||
838 | /* Deallocate a stream if it is heap-allocated. Preallocated | |
839 | stdin/stdout/stderr streams are not deallocated. */ | |
840 | static inline void | |
841 | _IO_deallocate_file (FILE *fp) | |
842 | { | |
843 | /* The current stream variables. */ | |
844 | if (fp == (FILE *) &_IO_2_1_stdin_ || fp == (FILE *) &_IO_2_1_stdout_ | |
845 | || fp == (FILE *) &_IO_2_1_stderr_) | |
846 | return; | |
847 | #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1) | |
848 | if (_IO_legacy_file (fp)) | |
849 | return; | |
850 | #endif | |
851 | free (fp); | |
852 | } | |
853 | ||
854 | #ifdef IO_DEBUG | |
855 | # define CHECK_FILE(FILE, RET) do { \ | |
856 | if ((FILE) == NULL \ | |
857 | || ((FILE)->_flags & _IO_MAGIC_MASK) != _IO_MAGIC) \ | |
858 | { \ | |
859 | __set_errno (EINVAL); \ | |
860 | return RET; \ | |
861 | } \ | |
862 | } while (0) | |
863 | #else | |
864 | # define CHECK_FILE(FILE, RET) do { } while (0) | |
865 | #endif | |
866 | ||
867 | static inline void | |
868 | __attribute__ ((__always_inline__)) | |
869 | _IO_acquire_lock_fct (FILE **p) | |
870 | { | |
871 | FILE *fp = *p; | |
872 | if ((fp->_flags & _IO_USER_LOCK) == 0) | |
873 | _IO_funlockfile (fp); | |
874 | } | |
875 | ||
876 | #if !defined _IO_MTSAFE_IO && IS_IN (libc) | |
877 | # define _IO_acquire_lock(_fp) \ | |
878 | do { | |
879 | # define _IO_release_lock(_fp) \ | |
880 | } while (0) | |
881 | #endif | |
882 | ||
883 | /* Collect all vtables in a special section for vtable verification. | |
884 | These symbols cover the extent of this section. */ | |
885 | symbol_set_declare (__libc_IO_vtables) | |
886 | ||
887 | /* libio vtables need to carry this attribute so that they pass | |
888 | validation. */ | |
889 | #define libio_vtable __attribute__ ((section ("__libc_IO_vtables"))) | |
890 | ||
891 | #ifdef SHARED | |
892 | /* If equal to &_IO_vtable_check (with pointer guard protection), | |
893 | unknown vtable pointers are valid. This function pointer is solely | |
894 | used as a flag. */ | |
895 | extern void (*IO_accept_foreign_vtables) (void) attribute_hidden; | |
896 | ||
897 | /* Assigns the passed function pointer (either NULL or | |
898 | &_IO_vtable_check) to IO_accept_foreign_vtables. */ | |
899 | static inline void | |
900 | IO_set_accept_foreign_vtables (void (*flag) (void)) | |
901 | { | |
902 | #ifdef PTR_MANGLE | |
903 | PTR_MANGLE (flag); | |
904 | #endif | |
905 | atomic_store_relaxed (&IO_accept_foreign_vtables, flag); | |
906 | } | |
907 | ||
908 | #else /* !SHARED */ | |
909 | ||
910 | /* The statically-linked version does nothing. */ | |
911 | static inline void | |
912 | IO_set_accept_foreign_vtables (void (*flag) (void)) | |
913 | { | |
914 | } | |
915 | ||
916 | #endif | |
917 | ||
918 | /* Check if unknown vtable pointers are permitted; otherwise, | |
919 | terminate the process. */ | |
920 | void _IO_vtable_check (void) attribute_hidden; | |
921 | ||
922 | /* Perform vtable pointer validation. If validation fails, terminate | |
923 | the process. */ | |
924 | static inline const struct _IO_jump_t * | |
925 | IO_validate_vtable (const struct _IO_jump_t *vtable) | |
926 | { | |
927 | /* Fast path: The vtable pointer is within the __libc_IO_vtables | |
928 | section. */ | |
929 | uintptr_t section_length = __stop___libc_IO_vtables - __start___libc_IO_vtables; | |
930 | uintptr_t ptr = (uintptr_t) vtable; | |
931 | uintptr_t offset = ptr - (uintptr_t) __start___libc_IO_vtables; | |
932 | if (__glibc_unlikely (offset >= section_length)) | |
933 | /* The vtable pointer is not in the expected section. Use the | |
934 | slow path, which will terminate the process if necessary. */ | |
935 | _IO_vtable_check (); | |
936 | return vtable; | |
937 | } | |
938 | ||
939 | /* Character set conversion. */ | |
940 | ||
941 | enum __codecvt_result | |
942 | { | |
943 | __codecvt_ok, | |
944 | __codecvt_partial, | |
945 | __codecvt_error, | |
946 | __codecvt_noconv | |
947 | }; | |
948 | ||
949 | enum __codecvt_result __libio_codecvt_out (struct _IO_codecvt *, | |
950 | __mbstate_t *, | |
951 | const wchar_t *, | |
952 | const wchar_t *, | |
953 | const wchar_t **, char *, | |
954 | char *, char **) | |
955 | attribute_hidden; | |
956 | enum __codecvt_result __libio_codecvt_in (struct _IO_codecvt *, | |
957 | __mbstate_t *, | |
958 | const char *, const char *, | |
959 | const char **, wchar_t *, | |
960 | wchar_t *, wchar_t **) | |
961 | attribute_hidden; | |
962 | int __libio_codecvt_encoding (struct _IO_codecvt *) attribute_hidden; | |
963 | int __libio_codecvt_length (struct _IO_codecvt *, __mbstate_t *, | |
964 | const char *, const char *, size_t) | |
965 | attribute_hidden; | |
966 | ||
967 | #endif /* libioP.h. */ |