1 | /* Copyright (C) 1993-2017 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 | #include <stddef.h> |
36 | |
37 | #include <errno.h> |
38 | #ifndef __set_errno |
39 | # define __set_errno(Val) errno = (Val) |
40 | #endif |
41 | #if defined __GLIBC__ && __GLIBC__ >= 2 |
42 | # include <libc-lock.h> |
43 | #else |
44 | /*# include <comthread.h>*/ |
45 | #endif |
46 | |
47 | #include <math_ldbl_opt.h> |
48 | |
49 | #include "iolibio.h" |
50 | |
51 | /* Control of exported symbols. Used in glibc. By default we don't |
52 | do anything. */ |
53 | #ifndef libc_hidden_proto |
54 | # define libc_hidden_proto(name) |
55 | #endif |
56 | #ifndef libc_hidden_def |
57 | # define libc_hidden_def(name) |
58 | #endif |
59 | #ifndef libc_hidden_weak |
60 | # define libc_hidden_weak(name) |
61 | #endif |
62 | |
63 | #ifdef __cplusplus |
64 | extern "C" { |
65 | #endif |
66 | |
67 | #define _IO_seek_set 0 |
68 | #define _IO_seek_cur 1 |
69 | #define _IO_seek_end 2 |
70 | |
71 | /* THE JUMPTABLE FUNCTIONS. |
72 | |
73 | * The _IO_FILE type is used to implement the FILE type in GNU libc, |
74 | * as well as the streambuf class in GNU iostreams for C++. |
75 | * These are all the same, just used differently. |
76 | * An _IO_FILE (or FILE) object is allows followed by a pointer to |
77 | * a jump table (of pointers to functions). The pointer is accessed |
78 | * with the _IO_JUMPS macro. The jump table has an eccentric format, |
79 | * so as to be compatible with the layout of a C++ virtual function table. |
80 | * (as implemented by g++). When a pointer to a streambuf object is |
81 | * coerced to an (_IO_FILE*), then _IO_JUMPS on the result just |
82 | * happens to point to the virtual function table of the streambuf. |
83 | * Thus the _IO_JUMPS function table used for C stdio/libio does |
84 | * double duty as the virtual function table for C++ streambuf. |
85 | * |
86 | * The entries in the _IO_JUMPS function table (and hence also the |
87 | * virtual functions of a streambuf) are described below. |
88 | * The first parameter of each function entry is the _IO_FILE/streambuf |
89 | * object being acted on (i.e. the 'this' parameter). |
90 | */ |
91 | |
92 | #ifdef _LIBC |
93 | # include <shlib-compat.h> |
94 | # if !SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1) |
95 | /* Setting this macro disables the use of the _vtable_offset |
96 | bias in _IO_JUMPS_FUNCS, below. That is only needed if we |
97 | want to support old binaries (see oldfileops.c). */ |
98 | # define _G_IO_NO_BACKWARD_COMPAT 1 |
99 | # endif |
100 | #endif |
101 | |
102 | #if (!defined _IO_USE_OLD_IO_FILE \ |
103 | && (!defined _G_IO_NO_BACKWARD_COMPAT || _G_IO_NO_BACKWARD_COMPAT == 0)) |
104 | # define _IO_JUMPS_OFFSET 1 |
105 | #else |
106 | # define _IO_JUMPS_OFFSET 0 |
107 | #endif |
108 | |
109 | /* Type of MEMBER in struct type TYPE. */ |
110 | #define _IO_MEMBER_TYPE(TYPE, MEMBER) __typeof__ (((TYPE){}).MEMBER) |
111 | |
112 | /* Essentially ((TYPE *) THIS)->MEMBER, but avoiding the aliasing |
113 | violation in case THIS has a different pointer type. */ |
114 | #define _IO_CAST_FIELD_ACCESS(THIS, TYPE, MEMBER) \ |
115 | (*(_IO_MEMBER_TYPE (TYPE, MEMBER) *)(((char *) (THIS)) \ |
116 | + offsetof(TYPE, MEMBER))) |
117 | |
118 | #define _IO_JUMPS(THIS) (THIS)->vtable |
119 | #define _IO_JUMPS_FILE_plus(THIS) \ |
120 | _IO_CAST_FIELD_ACCESS ((THIS), struct _IO_FILE_plus, vtable) |
121 | #define _IO_WIDE_JUMPS(THIS) \ |
122 | _IO_CAST_FIELD_ACCESS ((THIS), struct _IO_FILE, _wide_data)->_wide_vtable |
123 | #define _IO_CHECK_WIDE(THIS) \ |
124 | (_IO_CAST_FIELD_ACCESS ((THIS), struct _IO_FILE, _wide_data) != NULL) |
125 | |
126 | #if _IO_JUMPS_OFFSET |
127 | # define _IO_JUMPS_FUNC(THIS) \ |
128 | (IO_validate_vtable \ |
129 | (*(struct _IO_jump_t **) ((void *) &_IO_JUMPS_FILE_plus (THIS) \ |
130 | + (THIS)->_vtable_offset))) |
131 | # define _IO_vtable_offset(THIS) (THIS)->_vtable_offset |
132 | #else |
133 | # define _IO_JUMPS_FUNC(THIS) (IO_validate_vtable (_IO_JUMPS_FILE_plus (THIS))) |
134 | # define _IO_vtable_offset(THIS) 0 |
135 | #endif |
136 | #define _IO_WIDE_JUMPS_FUNC(THIS) _IO_WIDE_JUMPS(THIS) |
137 | #define JUMP_FIELD(TYPE, NAME) TYPE NAME |
138 | #define JUMP0(FUNC, THIS) (_IO_JUMPS_FUNC(THIS)->FUNC) (THIS) |
139 | #define JUMP1(FUNC, THIS, X1) (_IO_JUMPS_FUNC(THIS)->FUNC) (THIS, X1) |
140 | #define JUMP2(FUNC, THIS, X1, X2) (_IO_JUMPS_FUNC(THIS)->FUNC) (THIS, X1, X2) |
141 | #define JUMP3(FUNC, THIS, X1,X2,X3) (_IO_JUMPS_FUNC(THIS)->FUNC) (THIS, X1,X2, X3) |
142 | #define JUMP_INIT(NAME, VALUE) VALUE |
143 | #define JUMP_INIT_DUMMY JUMP_INIT(dummy, 0), JUMP_INIT (dummy2, 0) |
144 | |
145 | #define WJUMP0(FUNC, THIS) (_IO_WIDE_JUMPS_FUNC(THIS)->FUNC) (THIS) |
146 | #define WJUMP1(FUNC, THIS, X1) (_IO_WIDE_JUMPS_FUNC(THIS)->FUNC) (THIS, X1) |
147 | #define WJUMP2(FUNC, THIS, X1, X2) (_IO_WIDE_JUMPS_FUNC(THIS)->FUNC) (THIS, X1, X2) |
148 | #define WJUMP3(FUNC, THIS, X1,X2,X3) (_IO_WIDE_JUMPS_FUNC(THIS)->FUNC) (THIS, X1,X2, X3) |
149 | |
150 | /* The 'finish' function does any final cleaning up of an _IO_FILE object. |
151 | It does not delete (free) it, but does everything else to finalize it. |
152 | It matches the streambuf::~streambuf virtual destructor. */ |
153 | typedef void (*_IO_finish_t) (_IO_FILE *, int); /* finalize */ |
154 | #define _IO_FINISH(FP) JUMP1 (__finish, FP, 0) |
155 | #define _IO_WFINISH(FP) WJUMP1 (__finish, FP, 0) |
156 | |
157 | /* The 'overflow' hook flushes the buffer. |
158 | The second argument is a character, or EOF. |
159 | It matches the streambuf::overflow virtual function. */ |
160 | typedef int (*_IO_overflow_t) (_IO_FILE *, int); |
161 | #define _IO_OVERFLOW(FP, CH) JUMP1 (__overflow, FP, CH) |
162 | #define _IO_WOVERFLOW(FP, CH) WJUMP1 (__overflow, FP, CH) |
163 | |
164 | /* The 'underflow' hook tries to fills the get buffer. |
165 | It returns the next character (as an unsigned char) or EOF. The next |
166 | character remains in the get buffer, and the get position is not changed. |
167 | It matches the streambuf::underflow virtual function. */ |
168 | typedef int (*_IO_underflow_t) (_IO_FILE *); |
169 | #define _IO_UNDERFLOW(FP) JUMP0 (__underflow, FP) |
170 | #define _IO_WUNDERFLOW(FP) WJUMP0 (__underflow, FP) |
171 | |
172 | /* The 'uflow' hook returns the next character in the input stream |
173 | (cast to unsigned char), and increments the read position; |
174 | EOF is returned on failure. |
175 | It matches the streambuf::uflow virtual function, which is not in the |
176 | cfront implementation, but was added to C++ by the ANSI/ISO committee. */ |
177 | #define _IO_UFLOW(FP) JUMP0 (__uflow, FP) |
178 | #define _IO_WUFLOW(FP) WJUMP0 (__uflow, FP) |
179 | |
180 | /* The 'pbackfail' hook handles backing up. |
181 | It matches the streambuf::pbackfail virtual function. */ |
182 | typedef int (*_IO_pbackfail_t) (_IO_FILE *, int); |
183 | #define _IO_PBACKFAIL(FP, CH) JUMP1 (__pbackfail, FP, CH) |
184 | #define _IO_WPBACKFAIL(FP, CH) WJUMP1 (__pbackfail, FP, CH) |
185 | |
186 | /* The 'xsputn' hook writes upto N characters from buffer DATA. |
187 | Returns EOF or the number of character actually written. |
188 | It matches the streambuf::xsputn virtual function. */ |
189 | typedef _IO_size_t (*_IO_xsputn_t) (_IO_FILE *FP, const void *DATA, |
190 | _IO_size_t N); |
191 | #define _IO_XSPUTN(FP, DATA, N) JUMP2 (__xsputn, FP, DATA, N) |
192 | #define _IO_WXSPUTN(FP, DATA, N) WJUMP2 (__xsputn, FP, DATA, N) |
193 | |
194 | /* The 'xsgetn' hook reads upto N characters into buffer DATA. |
195 | Returns the number of character actually read. |
196 | It matches the streambuf::xsgetn virtual function. */ |
197 | typedef _IO_size_t (*_IO_xsgetn_t) (_IO_FILE *FP, void *DATA, _IO_size_t N); |
198 | #define _IO_XSGETN(FP, DATA, N) JUMP2 (__xsgetn, FP, DATA, N) |
199 | #define _IO_WXSGETN(FP, DATA, N) WJUMP2 (__xsgetn, FP, DATA, N) |
200 | |
201 | /* The 'seekoff' hook moves the stream position to a new position |
202 | relative to the start of the file (if DIR==0), the current position |
203 | (MODE==1), or the end of the file (MODE==2). |
204 | It matches the streambuf::seekoff virtual function. |
205 | It is also used for the ANSI fseek function. */ |
206 | typedef _IO_off64_t (*_IO_seekoff_t) (_IO_FILE *FP, _IO_off64_t OFF, int DIR, |
207 | int MODE); |
208 | #define _IO_SEEKOFF(FP, OFF, DIR, MODE) JUMP3 (__seekoff, FP, OFF, DIR, MODE) |
209 | #define _IO_WSEEKOFF(FP, OFF, DIR, MODE) WJUMP3 (__seekoff, FP, OFF, DIR, MODE) |
210 | |
211 | /* The 'seekpos' hook also moves the stream position, |
212 | but to an absolute position given by a fpos64_t (seekpos). |
213 | It matches the streambuf::seekpos virtual function. |
214 | It is also used for the ANSI fgetpos and fsetpos functions. */ |
215 | /* The _IO_seek_cur and _IO_seek_end options are not allowed. */ |
216 | typedef _IO_off64_t (*_IO_seekpos_t) (_IO_FILE *, _IO_off64_t, int); |
217 | #define _IO_SEEKPOS(FP, POS, FLAGS) JUMP2 (__seekpos, FP, POS, FLAGS) |
218 | #define _IO_WSEEKPOS(FP, POS, FLAGS) WJUMP2 (__seekpos, FP, POS, FLAGS) |
219 | |
220 | /* The 'setbuf' hook gives a buffer to the file. |
221 | It matches the streambuf::setbuf virtual function. */ |
222 | typedef _IO_FILE* (*_IO_setbuf_t) (_IO_FILE *, char *, _IO_ssize_t); |
223 | #define _IO_SETBUF(FP, BUFFER, LENGTH) JUMP2 (__setbuf, FP, BUFFER, LENGTH) |
224 | #define _IO_WSETBUF(FP, BUFFER, LENGTH) WJUMP2 (__setbuf, FP, BUFFER, LENGTH) |
225 | |
226 | /* The 'sync' hook attempts to synchronize the internal data structures |
227 | of the file with the external state. |
228 | It matches the streambuf::sync virtual function. */ |
229 | typedef int (*_IO_sync_t) (_IO_FILE *); |
230 | #define _IO_SYNC(FP) JUMP0 (__sync, FP) |
231 | #define _IO_WSYNC(FP) WJUMP0 (__sync, FP) |
232 | |
233 | /* The 'doallocate' hook is used to tell the file to allocate a buffer. |
234 | It matches the streambuf::doallocate virtual function, which is not |
235 | in the ANSI/ISO C++ standard, but is part traditional implementations. */ |
236 | typedef int (*_IO_doallocate_t) (_IO_FILE *); |
237 | #define _IO_DOALLOCATE(FP) JUMP0 (__doallocate, FP) |
238 | #define _IO_WDOALLOCATE(FP) WJUMP0 (__doallocate, FP) |
239 | |
240 | /* The following four hooks (sysread, syswrite, sysclose, sysseek, and |
241 | sysstat) are low-level hooks specific to this implementation. |
242 | There is no correspondence in the ANSI/ISO C++ standard library. |
243 | The hooks basically correspond to the Unix system functions |
244 | (read, write, close, lseek, and stat) except that a _IO_FILE* |
245 | parameter is used instead of an integer file descriptor; the default |
246 | implementation used for normal files just calls those functions. |
247 | The advantage of overriding these functions instead of the higher-level |
248 | ones (underflow, overflow etc) is that you can leave all the buffering |
249 | higher-level functions. */ |
250 | |
251 | /* The 'sysread' hook is used to read data from the external file into |
252 | an existing buffer. It generalizes the Unix read(2) function. |
253 | It matches the streambuf::sys_read virtual function, which is |
254 | specific to this implementation. */ |
255 | typedef _IO_ssize_t (*_IO_read_t) (_IO_FILE *, void *, _IO_ssize_t); |
256 | #define _IO_SYSREAD(FP, DATA, LEN) JUMP2 (__read, FP, DATA, LEN) |
257 | #define _IO_WSYSREAD(FP, DATA, LEN) WJUMP2 (__read, FP, DATA, LEN) |
258 | |
259 | /* The 'syswrite' hook is used to write data from an existing buffer |
260 | to an external file. It generalizes the Unix write(2) function. |
261 | It matches the streambuf::sys_write virtual function, which is |
262 | specific to this implementation. */ |
263 | typedef _IO_ssize_t (*_IO_write_t) (_IO_FILE *, const void *, _IO_ssize_t); |
264 | #define _IO_SYSWRITE(FP, DATA, LEN) JUMP2 (__write, FP, DATA, LEN) |
265 | #define _IO_WSYSWRITE(FP, DATA, LEN) WJUMP2 (__write, FP, DATA, LEN) |
266 | |
267 | /* The 'sysseek' hook is used to re-position an external file. |
268 | It generalizes the Unix lseek(2) function. |
269 | It matches the streambuf::sys_seek virtual function, which is |
270 | specific to this implementation. */ |
271 | typedef _IO_off64_t (*_IO_seek_t) (_IO_FILE *, _IO_off64_t, int); |
272 | #define _IO_SYSSEEK(FP, OFFSET, MODE) JUMP2 (__seek, FP, OFFSET, MODE) |
273 | #define _IO_WSYSSEEK(FP, OFFSET, MODE) WJUMP2 (__seek, FP, OFFSET, MODE) |
274 | |
275 | /* The 'sysclose' hook is used to finalize (close, finish up) an |
276 | external file. It generalizes the Unix close(2) function. |
277 | It matches the streambuf::sys_close virtual function, which is |
278 | specific to this implementation. */ |
279 | typedef int (*_IO_close_t) (_IO_FILE *); /* finalize */ |
280 | #define _IO_SYSCLOSE(FP) JUMP0 (__close, FP) |
281 | #define _IO_WSYSCLOSE(FP) WJUMP0 (__close, FP) |
282 | |
283 | /* The 'sysstat' hook is used to get information about an external file |
284 | into a struct stat buffer. It generalizes the Unix fstat(2) call. |
285 | It matches the streambuf::sys_stat virtual function, which is |
286 | specific to this implementation. */ |
287 | typedef int (*_IO_stat_t) (_IO_FILE *, void *); |
288 | #define _IO_SYSSTAT(FP, BUF) JUMP1 (__stat, FP, BUF) |
289 | #define _IO_WSYSSTAT(FP, BUF) WJUMP1 (__stat, FP, BUF) |
290 | |
291 | /* The 'showmany' hook can be used to get an image how much input is |
292 | available. In many cases the answer will be 0 which means unknown |
293 | but some cases one can provide real information. */ |
294 | typedef int (*_IO_showmanyc_t) (_IO_FILE *); |
295 | #define _IO_SHOWMANYC(FP) JUMP0 (__showmanyc, FP) |
296 | #define _IO_WSHOWMANYC(FP) WJUMP0 (__showmanyc, FP) |
297 | |
298 | /* The 'imbue' hook is used to get information about the currently |
299 | installed locales. */ |
300 | typedef void (*_IO_imbue_t) (_IO_FILE *, void *); |
301 | #define _IO_IMBUE(FP, LOCALE) JUMP1 (__imbue, FP, LOCALE) |
302 | #define _IO_WIMBUE(FP, LOCALE) WJUMP1 (__imbue, FP, LOCALE) |
303 | |
304 | |
305 | #define _IO_CHAR_TYPE char /* unsigned char ? */ |
306 | #define _IO_INT_TYPE int |
307 | |
308 | struct _IO_jump_t |
309 | { |
310 | JUMP_FIELD(size_t, __dummy); |
311 | JUMP_FIELD(size_t, __dummy2); |
312 | JUMP_FIELD(_IO_finish_t, __finish); |
313 | JUMP_FIELD(_IO_overflow_t, __overflow); |
314 | JUMP_FIELD(_IO_underflow_t, __underflow); |
315 | JUMP_FIELD(_IO_underflow_t, __uflow); |
316 | JUMP_FIELD(_IO_pbackfail_t, __pbackfail); |
317 | /* showmany */ |
318 | JUMP_FIELD(_IO_xsputn_t, __xsputn); |
319 | JUMP_FIELD(_IO_xsgetn_t, __xsgetn); |
320 | JUMP_FIELD(_IO_seekoff_t, __seekoff); |
321 | JUMP_FIELD(_IO_seekpos_t, __seekpos); |
322 | JUMP_FIELD(_IO_setbuf_t, __setbuf); |
323 | JUMP_FIELD(_IO_sync_t, __sync); |
324 | JUMP_FIELD(_IO_doallocate_t, __doallocate); |
325 | JUMP_FIELD(_IO_read_t, __read); |
326 | JUMP_FIELD(_IO_write_t, __write); |
327 | JUMP_FIELD(_IO_seek_t, __seek); |
328 | JUMP_FIELD(_IO_close_t, __close); |
329 | JUMP_FIELD(_IO_stat_t, __stat); |
330 | JUMP_FIELD(_IO_showmanyc_t, __showmanyc); |
331 | JUMP_FIELD(_IO_imbue_t, __imbue); |
332 | #if 0 |
333 | get_column; |
334 | set_column; |
335 | #endif |
336 | }; |
337 | |
338 | /* We always allocate an extra word following an _IO_FILE. |
339 | This contains a pointer to the function jump table used. |
340 | This is for compatibility with C++ streambuf; the word can |
341 | be used to smash to a pointer to a virtual function table. */ |
342 | |
343 | struct _IO_FILE_plus |
344 | { |
345 | _IO_FILE file; |
346 | const struct _IO_jump_t *vtable; |
347 | }; |
348 | |
349 | #ifdef _IO_USE_OLD_IO_FILE |
350 | /* This structure is used by the compatibility code as if it were an |
351 | _IO_FILE_plus, but has enough space to initialize the _mode argument |
352 | of an _IO_FILE_complete. */ |
353 | struct _IO_FILE_complete_plus |
354 | { |
355 | struct _IO_FILE_complete file; |
356 | const struct _IO_jump_t *vtable; |
357 | }; |
358 | #endif |
359 | |
360 | /* Special file type for fopencookie function. */ |
361 | struct _IO_cookie_file |
362 | { |
363 | struct _IO_FILE_plus __fp; |
364 | void *__cookie; |
365 | _IO_cookie_io_functions_t __io_functions; |
366 | }; |
367 | |
368 | _IO_FILE *_IO_fopencookie (void *cookie, const char *mode, |
369 | _IO_cookie_io_functions_t io_functions); |
370 | |
371 | |
372 | /* Iterator type for walking global linked list of _IO_FILE objects. */ |
373 | |
374 | typedef struct _IO_FILE *_IO_ITER; |
375 | |
376 | /* Generic functions */ |
377 | |
378 | extern void _IO_switch_to_main_get_area (_IO_FILE *) __THROW; |
379 | extern void _IO_switch_to_backup_area (_IO_FILE *) __THROW; |
380 | extern int _IO_switch_to_get_mode (_IO_FILE *); |
381 | libc_hidden_proto (_IO_switch_to_get_mode) |
382 | extern void _IO_init_internal (_IO_FILE *, int) attribute_hidden; |
383 | extern int _IO_sputbackc (_IO_FILE *, int) __THROW; |
384 | libc_hidden_proto (_IO_sputbackc) |
385 | extern int _IO_sungetc (_IO_FILE *) __THROW; |
386 | extern void _IO_un_link (struct _IO_FILE_plus *) __THROW; |
387 | libc_hidden_proto (_IO_un_link) |
388 | extern void _IO_link_in (struct _IO_FILE_plus *) __THROW; |
389 | libc_hidden_proto (_IO_link_in) |
390 | extern void _IO_doallocbuf (_IO_FILE *) __THROW; |
391 | libc_hidden_proto (_IO_doallocbuf) |
392 | extern void _IO_unsave_markers (_IO_FILE *) __THROW; |
393 | libc_hidden_proto (_IO_unsave_markers) |
394 | extern void _IO_setb (_IO_FILE *, char *, char *, int) __THROW; |
395 | libc_hidden_proto (_IO_setb) |
396 | extern unsigned _IO_adjust_column (unsigned, const char *, int) __THROW; |
397 | libc_hidden_proto (_IO_adjust_column) |
398 | #define _IO_sputn(__fp, __s, __n) _IO_XSPUTN (__fp, __s, __n) |
399 | |
400 | _IO_ssize_t _IO_least_wmarker (_IO_FILE *, wchar_t *) __THROW; |
401 | libc_hidden_proto (_IO_least_wmarker) |
402 | extern void _IO_switch_to_main_wget_area (_IO_FILE *) __THROW; |
403 | libc_hidden_proto (_IO_switch_to_main_wget_area) |
404 | extern void _IO_switch_to_wbackup_area (_IO_FILE *) __THROW; |
405 | libc_hidden_proto (_IO_switch_to_wbackup_area) |
406 | extern int _IO_switch_to_wget_mode (_IO_FILE *); |
407 | libc_hidden_proto (_IO_switch_to_wget_mode) |
408 | extern void _IO_wsetb (_IO_FILE *, wchar_t *, wchar_t *, int) __THROW; |
409 | libc_hidden_proto (_IO_wsetb) |
410 | extern wint_t _IO_sputbackwc (_IO_FILE *, wint_t) __THROW; |
411 | libc_hidden_proto (_IO_sputbackwc) |
412 | extern wint_t _IO_sungetwc (_IO_FILE *) __THROW; |
413 | extern void _IO_wdoallocbuf (_IO_FILE *) __THROW; |
414 | libc_hidden_proto (_IO_wdoallocbuf) |
415 | extern void _IO_unsave_wmarkers (_IO_FILE *) __THROW; |
416 | extern unsigned _IO_adjust_wcolumn (unsigned, const wchar_t *, int) __THROW; |
417 | extern _IO_off64_t get_file_offset (_IO_FILE *fp); |
418 | |
419 | /* Marker-related function. */ |
420 | |
421 | extern void _IO_init_marker (struct _IO_marker *, _IO_FILE *); |
422 | extern void _IO_init_wmarker (struct _IO_marker *, _IO_FILE *); |
423 | extern void _IO_remove_marker (struct _IO_marker *) __THROW; |
424 | extern int _IO_marker_difference (struct _IO_marker *, struct _IO_marker *) |
425 | __THROW; |
426 | extern int _IO_marker_delta (struct _IO_marker *) __THROW; |
427 | extern int _IO_wmarker_delta (struct _IO_marker *) __THROW; |
428 | extern int _IO_seekmark (_IO_FILE *, struct _IO_marker *, int) __THROW; |
429 | extern int _IO_seekwmark (_IO_FILE *, struct _IO_marker *, int) __THROW; |
430 | |
431 | /* Functions for iterating global list and dealing with its lock */ |
432 | |
433 | extern _IO_ITER _IO_iter_begin (void) __THROW; |
434 | libc_hidden_proto (_IO_iter_begin) |
435 | extern _IO_ITER _IO_iter_end (void) __THROW; |
436 | libc_hidden_proto (_IO_iter_end) |
437 | extern _IO_ITER _IO_iter_next (_IO_ITER) __THROW; |
438 | libc_hidden_proto (_IO_iter_next) |
439 | extern _IO_FILE *_IO_iter_file (_IO_ITER) __THROW; |
440 | libc_hidden_proto (_IO_iter_file) |
441 | extern void _IO_list_lock (void) __THROW; |
442 | libc_hidden_proto (_IO_list_lock) |
443 | extern void _IO_list_unlock (void) __THROW; |
444 | libc_hidden_proto (_IO_list_unlock) |
445 | extern void _IO_list_resetlock (void) __THROW; |
446 | libc_hidden_proto (_IO_list_resetlock) |
447 | |
448 | /* Default jumptable functions. */ |
449 | |
450 | extern int _IO_default_underflow (_IO_FILE *) __THROW; |
451 | extern int _IO_default_uflow (_IO_FILE *); |
452 | libc_hidden_proto (_IO_default_uflow) |
453 | extern wint_t _IO_wdefault_uflow (_IO_FILE *); |
454 | libc_hidden_proto (_IO_wdefault_uflow) |
455 | extern int _IO_default_doallocate (_IO_FILE *) __THROW; |
456 | libc_hidden_proto (_IO_default_doallocate) |
457 | extern int _IO_wdefault_doallocate (_IO_FILE *) __THROW; |
458 | libc_hidden_proto (_IO_wdefault_doallocate) |
459 | extern void _IO_default_finish (_IO_FILE *, int) __THROW; |
460 | libc_hidden_proto (_IO_default_finish) |
461 | extern void _IO_wdefault_finish (_IO_FILE *, int) __THROW; |
462 | libc_hidden_proto (_IO_wdefault_finish) |
463 | extern int _IO_default_pbackfail (_IO_FILE *, int) __THROW; |
464 | libc_hidden_proto (_IO_default_pbackfail) |
465 | extern wint_t _IO_wdefault_pbackfail (_IO_FILE *, wint_t) __THROW; |
466 | libc_hidden_proto (_IO_wdefault_pbackfail) |
467 | extern _IO_FILE* _IO_default_setbuf (_IO_FILE *, char *, _IO_ssize_t); |
468 | extern _IO_size_t _IO_default_xsputn (_IO_FILE *, const void *, _IO_size_t); |
469 | libc_hidden_proto (_IO_default_xsputn) |
470 | extern _IO_size_t _IO_wdefault_xsputn (_IO_FILE *, const void *, _IO_size_t); |
471 | libc_hidden_proto (_IO_wdefault_xsputn) |
472 | extern _IO_size_t _IO_default_xsgetn (_IO_FILE *, void *, _IO_size_t); |
473 | libc_hidden_proto (_IO_default_xsgetn) |
474 | extern _IO_size_t _IO_wdefault_xsgetn (_IO_FILE *, void *, _IO_size_t); |
475 | libc_hidden_proto (_IO_wdefault_xsgetn) |
476 | extern _IO_off64_t _IO_default_seekoff (_IO_FILE *, _IO_off64_t, int, int) |
477 | __THROW; |
478 | extern _IO_off64_t _IO_default_seekpos (_IO_FILE *, _IO_off64_t, int); |
479 | extern _IO_ssize_t _IO_default_write (_IO_FILE *, const void *, _IO_ssize_t); |
480 | extern _IO_ssize_t _IO_default_read (_IO_FILE *, void *, _IO_ssize_t); |
481 | extern int _IO_default_stat (_IO_FILE *, void *) __THROW; |
482 | extern _IO_off64_t _IO_default_seek (_IO_FILE *, _IO_off64_t, int) __THROW; |
483 | extern int _IO_default_sync (_IO_FILE *) __THROW; |
484 | #define _IO_default_close ((_IO_close_t) _IO_default_sync) |
485 | extern int _IO_default_showmanyc (_IO_FILE *) __THROW; |
486 | extern void _IO_default_imbue (_IO_FILE *, void *) __THROW; |
487 | |
488 | extern const struct _IO_jump_t _IO_file_jumps; |
489 | libc_hidden_proto (_IO_file_jumps) |
490 | extern const struct _IO_jump_t _IO_file_jumps_mmap attribute_hidden; |
491 | extern const struct _IO_jump_t _IO_file_jumps_maybe_mmap attribute_hidden; |
492 | extern const struct _IO_jump_t _IO_wfile_jumps; |
493 | libc_hidden_proto (_IO_wfile_jumps) |
494 | extern const struct _IO_jump_t _IO_wfile_jumps_mmap attribute_hidden; |
495 | extern const struct _IO_jump_t _IO_wfile_jumps_maybe_mmap attribute_hidden; |
496 | extern const struct _IO_jump_t _IO_old_file_jumps attribute_hidden; |
497 | extern const struct _IO_jump_t _IO_streambuf_jumps; |
498 | extern const struct _IO_jump_t _IO_old_proc_jumps attribute_hidden; |
499 | extern const struct _IO_jump_t _IO_str_jumps attribute_hidden; |
500 | extern const struct _IO_jump_t _IO_wstr_jumps attribute_hidden; |
501 | extern const struct _IO_codecvt __libio_codecvt attribute_hidden; |
502 | extern int _IO_do_write (_IO_FILE *, const char *, _IO_size_t); |
503 | libc_hidden_proto (_IO_do_write) |
504 | extern int _IO_new_do_write (_IO_FILE *, const char *, _IO_size_t); |
505 | extern int _IO_old_do_write (_IO_FILE *, const char *, _IO_size_t); |
506 | extern int _IO_wdo_write (_IO_FILE *, const wchar_t *, _IO_size_t); |
507 | libc_hidden_proto (_IO_wdo_write) |
508 | extern int _IO_flush_all_lockp (int); |
509 | extern int _IO_flush_all (void); |
510 | libc_hidden_proto (_IO_flush_all) |
511 | extern int _IO_cleanup (void); |
512 | extern void _IO_flush_all_linebuffered (void); |
513 | libc_hidden_proto (_IO_flush_all_linebuffered) |
514 | extern int _IO_new_fgetpos (_IO_FILE *, _IO_fpos_t *); |
515 | extern int _IO_old_fgetpos (_IO_FILE *, _IO_fpos_t *); |
516 | extern int _IO_new_fsetpos (_IO_FILE *, const _IO_fpos_t *); |
517 | extern int _IO_old_fsetpos (_IO_FILE *, const _IO_fpos_t *); |
518 | extern int _IO_new_fgetpos64 (_IO_FILE *, _IO_fpos64_t *); |
519 | extern int _IO_old_fgetpos64 (_IO_FILE *, _IO_fpos64_t *); |
520 | extern int _IO_new_fsetpos64 (_IO_FILE *, const _IO_fpos64_t *); |
521 | extern int _IO_old_fsetpos64 (_IO_FILE *, const _IO_fpos64_t *); |
522 | extern void _IO_old_init (_IO_FILE *fp, int flags) __THROW; |
523 | |
524 | |
525 | #if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T |
526 | # define _IO_do_flush(_f) \ |
527 | ((_f)->_mode <= 0 \ |
528 | ? _IO_do_write(_f, (_f)->_IO_write_base, \ |
529 | (_f)->_IO_write_ptr-(_f)->_IO_write_base) \ |
530 | : _IO_wdo_write(_f, (_f)->_wide_data->_IO_write_base, \ |
531 | ((_f)->_wide_data->_IO_write_ptr \ |
532 | - (_f)->_wide_data->_IO_write_base))) |
533 | #else |
534 | # define _IO_do_flush(_f) \ |
535 | _IO_do_write(_f, (_f)->_IO_write_base, \ |
536 | (_f)->_IO_write_ptr-(_f)->_IO_write_base) |
537 | #endif |
538 | #define _IO_old_do_flush(_f) \ |
539 | _IO_old_do_write(_f, (_f)->_IO_write_base, \ |
540 | (_f)->_IO_write_ptr-(_f)->_IO_write_base) |
541 | #define _IO_in_put_mode(_fp) ((_fp)->_flags & _IO_CURRENTLY_PUTTING) |
542 | #define _IO_mask_flags(fp, f, mask) \ |
543 | ((fp)->_flags = ((fp)->_flags & ~(mask)) | ((f) & (mask))) |
544 | #define _IO_setg(fp, eb, g, eg) ((fp)->_IO_read_base = (eb),\ |
545 | (fp)->_IO_read_ptr = (g), (fp)->_IO_read_end = (eg)) |
546 | #define _IO_wsetg(fp, eb, g, eg) ((fp)->_wide_data->_IO_read_base = (eb),\ |
547 | (fp)->_wide_data->_IO_read_ptr = (g), \ |
548 | (fp)->_wide_data->_IO_read_end = (eg)) |
549 | #define _IO_setp(__fp, __p, __ep) \ |
550 | ((__fp)->_IO_write_base = (__fp)->_IO_write_ptr \ |
551 | = __p, (__fp)->_IO_write_end = (__ep)) |
552 | #define _IO_wsetp(__fp, __p, __ep) \ |
553 | ((__fp)->_wide_data->_IO_write_base \ |
554 | = (__fp)->_wide_data->_IO_write_ptr = __p, \ |
555 | (__fp)->_wide_data->_IO_write_end = (__ep)) |
556 | #define _IO_have_backup(fp) ((fp)->_IO_save_base != NULL) |
557 | #define _IO_have_wbackup(fp) ((fp)->_wide_data->_IO_save_base != NULL) |
558 | #define _IO_in_backup(fp) ((fp)->_flags & _IO_IN_BACKUP) |
559 | #define _IO_have_markers(fp) ((fp)->_markers != NULL) |
560 | #define _IO_blen(fp) ((fp)->_IO_buf_end - (fp)->_IO_buf_base) |
561 | #define _IO_wblen(fp) ((fp)->_wide_data->_IO_buf_end \ |
562 | - (fp)->_wide_data->_IO_buf_base) |
563 | |
564 | /* Jumptable functions for files. */ |
565 | |
566 | extern int _IO_file_doallocate (_IO_FILE *) __THROW; |
567 | libc_hidden_proto (_IO_file_doallocate) |
568 | extern _IO_FILE* _IO_file_setbuf (_IO_FILE *, char *, _IO_ssize_t); |
569 | libc_hidden_proto (_IO_file_setbuf) |
570 | extern _IO_off64_t _IO_file_seekoff (_IO_FILE *, _IO_off64_t, int, int); |
571 | libc_hidden_proto (_IO_file_seekoff) |
572 | extern _IO_off64_t _IO_file_seekoff_mmap (_IO_FILE *, _IO_off64_t, int, int) |
573 | __THROW; |
574 | extern _IO_size_t _IO_file_xsputn (_IO_FILE *, const void *, _IO_size_t); |
575 | libc_hidden_proto (_IO_file_xsputn) |
576 | extern _IO_size_t _IO_file_xsgetn (_IO_FILE *, void *, _IO_size_t); |
577 | libc_hidden_proto (_IO_file_xsgetn) |
578 | extern int _IO_file_stat (_IO_FILE *, void *) __THROW; |
579 | libc_hidden_proto (_IO_file_stat) |
580 | extern int _IO_file_close (_IO_FILE *) __THROW; |
581 | libc_hidden_proto (_IO_file_close) |
582 | extern int _IO_file_close_mmap (_IO_FILE *) __THROW; |
583 | extern int _IO_file_underflow (_IO_FILE *); |
584 | libc_hidden_proto (_IO_file_underflow) |
585 | extern int _IO_file_underflow_mmap (_IO_FILE *); |
586 | extern int _IO_file_underflow_maybe_mmap (_IO_FILE *); |
587 | extern int _IO_file_overflow (_IO_FILE *, int); |
588 | libc_hidden_proto (_IO_file_overflow) |
589 | #define _IO_file_is_open(__fp) ((__fp)->_fileno != -1) |
590 | extern _IO_FILE* _IO_file_attach (_IO_FILE *, int); |
591 | libc_hidden_proto (_IO_file_attach) |
592 | extern _IO_FILE* _IO_file_open (_IO_FILE *, const char *, int, int, int, int); |
593 | libc_hidden_proto (_IO_file_open) |
594 | extern _IO_FILE* _IO_file_fopen (_IO_FILE *, const char *, const char *, int); |
595 | libc_hidden_proto (_IO_file_fopen) |
596 | extern _IO_ssize_t _IO_file_write (_IO_FILE *, const void *, _IO_ssize_t); |
597 | extern _IO_ssize_t _IO_file_read (_IO_FILE *, void *, _IO_ssize_t); |
598 | libc_hidden_proto (_IO_file_read) |
599 | extern int _IO_file_sync (_IO_FILE *); |
600 | libc_hidden_proto (_IO_file_sync) |
601 | extern int _IO_file_close_it (_IO_FILE *); |
602 | libc_hidden_proto (_IO_file_close_it) |
603 | extern _IO_off64_t _IO_file_seek (_IO_FILE *, _IO_off64_t, int) __THROW; |
604 | libc_hidden_proto (_IO_file_seek) |
605 | extern void _IO_file_finish (_IO_FILE *, int); |
606 | libc_hidden_proto (_IO_file_finish) |
607 | |
608 | extern _IO_FILE* _IO_new_file_attach (_IO_FILE *, int); |
609 | extern int _IO_new_file_close_it (_IO_FILE *); |
610 | extern void _IO_new_file_finish (_IO_FILE *, int); |
611 | extern _IO_FILE* _IO_new_file_fopen (_IO_FILE *, const char *, const char *, |
612 | int); |
613 | extern void _IO_no_init (_IO_FILE *, int, int, struct _IO_wide_data *, |
614 | const struct _IO_jump_t *) __THROW; |
615 | extern void _IO_new_file_init_internal (struct _IO_FILE_plus *) |
616 | __THROW attribute_hidden; |
617 | extern _IO_FILE* _IO_new_file_setbuf (_IO_FILE *, char *, _IO_ssize_t); |
618 | extern _IO_FILE* _IO_file_setbuf_mmap (_IO_FILE *, char *, _IO_ssize_t); |
619 | extern int _IO_new_file_sync (_IO_FILE *); |
620 | extern int _IO_new_file_underflow (_IO_FILE *); |
621 | extern int _IO_new_file_overflow (_IO_FILE *, int); |
622 | extern _IO_off64_t _IO_new_file_seekoff (_IO_FILE *, _IO_off64_t, int, int); |
623 | extern _IO_ssize_t _IO_new_file_write (_IO_FILE *, const void *, _IO_ssize_t); |
624 | extern _IO_size_t _IO_new_file_xsputn (_IO_FILE *, const void *, _IO_size_t); |
625 | |
626 | extern _IO_FILE* _IO_old_file_setbuf (_IO_FILE *, char *, _IO_ssize_t); |
627 | extern _IO_off64_t _IO_old_file_seekoff (_IO_FILE *, _IO_off64_t, int, int); |
628 | extern _IO_size_t _IO_old_file_xsputn (_IO_FILE *, const void *, _IO_size_t); |
629 | extern int _IO_old_file_underflow (_IO_FILE *); |
630 | extern int _IO_old_file_overflow (_IO_FILE *, int); |
631 | extern void _IO_old_file_init_internal (struct _IO_FILE_plus *) |
632 | __THROW attribute_hidden; |
633 | extern _IO_FILE* _IO_old_file_attach (_IO_FILE *, int); |
634 | extern _IO_FILE* _IO_old_file_fopen (_IO_FILE *, const char *, const char *); |
635 | extern _IO_ssize_t _IO_old_file_write (_IO_FILE *, const void *, _IO_ssize_t); |
636 | extern int _IO_old_file_sync (_IO_FILE *); |
637 | extern int _IO_old_file_close_it (_IO_FILE *); |
638 | extern void _IO_old_file_finish (_IO_FILE *, int); |
639 | |
640 | extern int _IO_wfile_doallocate (_IO_FILE *) __THROW; |
641 | extern _IO_size_t _IO_wfile_xsputn (_IO_FILE *, const void *, _IO_size_t); |
642 | libc_hidden_proto (_IO_wfile_xsputn) |
643 | extern _IO_FILE* _IO_wfile_setbuf (_IO_FILE *, wchar_t *, _IO_ssize_t); |
644 | extern wint_t _IO_wfile_sync (_IO_FILE *); |
645 | libc_hidden_proto (_IO_wfile_sync) |
646 | extern wint_t _IO_wfile_underflow (_IO_FILE *); |
647 | libc_hidden_proto (_IO_wfile_underflow) |
648 | extern wint_t _IO_wfile_overflow (_IO_FILE *, wint_t); |
649 | libc_hidden_proto (_IO_wfile_overflow) |
650 | extern _IO_off64_t _IO_wfile_seekoff (_IO_FILE *, _IO_off64_t, int, int); |
651 | libc_hidden_proto (_IO_wfile_seekoff) |
652 | |
653 | /* Jumptable functions for proc_files. */ |
654 | extern _IO_FILE* _IO_proc_open (_IO_FILE *, const char *, const char *) |
655 | __THROW; |
656 | extern _IO_FILE* _IO_new_proc_open (_IO_FILE *, const char *, const char *) |
657 | __THROW; |
658 | extern _IO_FILE* _IO_old_proc_open (_IO_FILE *, const char *, const char *); |
659 | extern int _IO_proc_close (_IO_FILE *) __THROW; |
660 | extern int _IO_new_proc_close (_IO_FILE *) __THROW; |
661 | extern int _IO_old_proc_close (_IO_FILE *); |
662 | |
663 | /* Jumptable functions for strfiles. */ |
664 | extern int _IO_str_underflow (_IO_FILE *) __THROW; |
665 | libc_hidden_proto (_IO_str_underflow) |
666 | extern int _IO_str_overflow (_IO_FILE *, int) __THROW; |
667 | libc_hidden_proto (_IO_str_overflow) |
668 | extern int _IO_str_pbackfail (_IO_FILE *, int) __THROW; |
669 | libc_hidden_proto (_IO_str_pbackfail) |
670 | extern _IO_off64_t _IO_str_seekoff (_IO_FILE *, _IO_off64_t, int, int) __THROW; |
671 | libc_hidden_proto (_IO_str_seekoff) |
672 | extern void _IO_str_finish (_IO_FILE *, int) __THROW; |
673 | |
674 | /* Other strfile functions */ |
675 | struct _IO_strfile_; |
676 | extern _IO_ssize_t _IO_str_count (_IO_FILE *) __THROW; |
677 | |
678 | /* And the wide character versions. */ |
679 | extern void _IO_wstr_init_static (_IO_FILE *, wchar_t *, _IO_size_t, wchar_t *) |
680 | __THROW; |
681 | extern _IO_ssize_t _IO_wstr_count (_IO_FILE *) __THROW; |
682 | extern _IO_wint_t _IO_wstr_overflow (_IO_FILE *, _IO_wint_t) __THROW; |
683 | extern _IO_wint_t _IO_wstr_underflow (_IO_FILE *) __THROW; |
684 | extern _IO_off64_t _IO_wstr_seekoff (_IO_FILE *, _IO_off64_t, int, int) |
685 | __THROW; |
686 | extern _IO_wint_t _IO_wstr_pbackfail (_IO_FILE *, _IO_wint_t) __THROW; |
687 | extern void _IO_wstr_finish (_IO_FILE *, int) __THROW; |
688 | |
689 | extern int _IO_vasprintf (char **result_ptr, const char *format, |
690 | _IO_va_list args) __THROW; |
691 | extern int _IO_vdprintf (int d, const char *format, _IO_va_list arg); |
692 | extern int _IO_vsnprintf (char *string, _IO_size_t maxlen, |
693 | const char *format, _IO_va_list args) __THROW; |
694 | |
695 | |
696 | extern _IO_size_t _IO_getline (_IO_FILE *,char *, _IO_size_t, int, int); |
697 | libc_hidden_proto (_IO_getline) |
698 | extern _IO_size_t _IO_getline_info (_IO_FILE *,char *, _IO_size_t, |
699 | int, int, int *); |
700 | libc_hidden_proto (_IO_getline_info) |
701 | extern _IO_ssize_t _IO_getdelim (char **, _IO_size_t *, int, _IO_FILE *); |
702 | extern _IO_size_t _IO_getwline (_IO_FILE *,wchar_t *, _IO_size_t, wint_t, int); |
703 | extern _IO_size_t _IO_getwline_info (_IO_FILE *,wchar_t *, _IO_size_t, |
704 | wint_t, int, wint_t *); |
705 | |
706 | extern struct _IO_FILE_plus *_IO_list_all; |
707 | libc_hidden_proto (_IO_list_all) |
708 | extern void (*_IO_cleanup_registration_needed) (void); |
709 | |
710 | extern void _IO_str_init_static_internal (struct _IO_strfile_ *, char *, |
711 | _IO_size_t, char *) __THROW; |
712 | extern _IO_off64_t _IO_seekoff_unlocked (_IO_FILE *, _IO_off64_t, int, int) |
713 | attribute_hidden; |
714 | extern _IO_off64_t _IO_seekpos_unlocked (_IO_FILE *, _IO_off64_t, int) |
715 | attribute_hidden; |
716 | |
717 | #ifndef EOF |
718 | # define EOF (-1) |
719 | #endif |
720 | #ifndef NULL |
721 | # if defined __GNUG__ && \ |
722 | (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 8)) |
723 | # define NULL (__null) |
724 | # else |
725 | # if !defined(__cplusplus) |
726 | # define NULL ((void*)0) |
727 | # else |
728 | # define NULL (0) |
729 | # endif |
730 | # endif |
731 | #endif |
732 | |
733 | #if _G_HAVE_MMAP |
734 | |
735 | # include <unistd.h> |
736 | # include <fcntl.h> |
737 | # include <sys/mman.h> |
738 | # include <sys/param.h> |
739 | |
740 | # if !defined(MAP_ANONYMOUS) && defined(MAP_ANON) |
741 | # define MAP_ANONYMOUS MAP_ANON |
742 | # endif |
743 | |
744 | # if !defined(MAP_ANONYMOUS) || !defined(EXEC_PAGESIZE) |
745 | # undef _G_HAVE_MMAP |
746 | # define _G_HAVE_MMAP 0 |
747 | # endif |
748 | |
749 | #endif /* _G_HAVE_MMAP */ |
750 | |
751 | #if _G_HAVE_MMAP |
752 | |
753 | # ifdef _LIBC |
754 | /* When using this code in the GNU libc we must not pollute the name space. */ |
755 | # define mmap __mmap |
756 | # define munmap __munmap |
757 | # define ftruncate __ftruncate |
758 | # endif |
759 | #endif /* _G_HAVE_MMAP */ |
760 | |
761 | #ifndef OS_FSTAT |
762 | # define OS_FSTAT fstat |
763 | #endif |
764 | extern int _IO_vscanf (const char *, _IO_va_list) __THROW; |
765 | |
766 | /* _IO_pos_BAD is an _IO_off64_t value indicating error, unknown, or EOF. */ |
767 | #ifndef _IO_pos_BAD |
768 | # define _IO_pos_BAD ((_IO_off64_t) -1) |
769 | #endif |
770 | /* _IO_pos_adjust adjust an _IO_off64_t by some number of bytes. */ |
771 | #ifndef _IO_pos_adjust |
772 | # define _IO_pos_adjust(pos, delta) ((pos) += (delta)) |
773 | #endif |
774 | /* _IO_pos_0 is an _IO_off64_t value indicating beginning of file. */ |
775 | #ifndef _IO_pos_0 |
776 | # define _IO_pos_0 ((_IO_off64_t) 0) |
777 | #endif |
778 | |
779 | #ifdef __cplusplus |
780 | } |
781 | #endif |
782 | |
783 | #ifdef _IO_MTSAFE_IO |
784 | /* check following! */ |
785 | # ifdef _IO_USE_OLD_IO_FILE |
786 | # define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \ |
787 | { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \ |
788 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (_IO_FILE *) CHAIN, FD, \ |
789 | 0, _IO_pos_BAD, 0, 0, { 0 }, &_IO_stdfile_##FD##_lock } |
790 | # else |
791 | # if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T |
792 | # define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \ |
793 | { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \ |
794 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (_IO_FILE *) CHAIN, FD, \ |
795 | 0, _IO_pos_BAD, 0, 0, { 0 }, &_IO_stdfile_##FD##_lock, _IO_pos_BAD,\ |
796 | NULL, WDP, 0 } |
797 | # else |
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, (_IO_FILE *) CHAIN, FD, \ |
801 | 0, _IO_pos_BAD, 0, 0, { 0 }, &_IO_stdfile_##FD##_lock, _IO_pos_BAD,\ |
802 | 0 } |
803 | # endif |
804 | # endif |
805 | #else |
806 | # ifdef _IO_USE_OLD_IO_FILE |
807 | # define FILEBUF_LITERAL(CHAIN, FLAGS, FD, WDP) \ |
808 | { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \ |
809 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (_IO_FILE *) CHAIN, FD, \ |
810 | 0, _IO_pos_BAD } |
811 | # else |
812 | # if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T |
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 }, 0, _IO_pos_BAD, \ |
817 | NULL, WDP, 0 } |
818 | # else |
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 }, 0, _IO_pos_BAD, \ |
823 | 0 } |
824 | # endif |
825 | # endif |
826 | #endif |
827 | |
828 | #define _IO_va_start(args, last) va_start(args, last) |
829 | |
830 | extern struct _IO_fake_stdiobuf _IO_stdin_buf, _IO_stdout_buf, _IO_stderr_buf; |
831 | |
832 | #if 1 |
833 | # define COERCE_FILE(FILE) /* Nothing */ |
834 | #else |
835 | /* This is part of the kludge for binary compatibility with old stdio. */ |
836 | # define COERCE_FILE(FILE) \ |
837 | (((FILE)->_IO_file_flags & _IO_MAGIC_MASK) == _OLD_MAGIC_MASK \ |
838 | && (FILE) = *(FILE**)&((int*)fp)[1]) |
839 | #endif |
840 | |
841 | #ifdef EINVAL |
842 | # define MAYBE_SET_EINVAL __set_errno (EINVAL) |
843 | #else |
844 | # define MAYBE_SET_EINVAL /* nothing */ |
845 | #endif |
846 | |
847 | #ifdef IO_DEBUG |
848 | # define CHECK_FILE(FILE, RET) \ |
849 | if ((FILE) == NULL) { MAYBE_SET_EINVAL; return RET; } \ |
850 | else { COERCE_FILE(FILE); \ |
851 | if (((FILE)->_IO_file_flags & _IO_MAGIC_MASK) != _IO_MAGIC) \ |
852 | { MAYBE_SET_EINVAL; return RET; }} |
853 | #else |
854 | # define CHECK_FILE(FILE, RET) COERCE_FILE (FILE) |
855 | #endif |
856 | |
857 | static inline void |
858 | __attribute__ ((__always_inline__)) |
859 | _IO_acquire_lock_fct (_IO_FILE **p) |
860 | { |
861 | _IO_FILE *fp = *p; |
862 | if ((fp->_flags & _IO_USER_LOCK) == 0) |
863 | _IO_funlockfile (fp); |
864 | } |
865 | |
866 | static inline void |
867 | __attribute__ ((__always_inline__)) |
868 | _IO_acquire_lock_clear_flags2_fct (_IO_FILE **p) |
869 | { |
870 | _IO_FILE *fp = *p; |
871 | fp->_flags2 &= ~(_IO_FLAGS2_FORTIFY | _IO_FLAGS2_SCANF_STD); |
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 | _IO_FILE *_IO_acquire_lock_file = NULL |
880 | # define _IO_acquire_lock_clear_flags2(_fp) \ |
881 | do { \ |
882 | _IO_FILE *_IO_acquire_lock_file = (_fp) |
883 | # define _IO_release_lock(_fp) \ |
884 | if (_IO_acquire_lock_file != NULL) \ |
885 | _IO_acquire_lock_file->_flags2 &= ~(_IO_FLAGS2_FORTIFY \ |
886 | | _IO_FLAGS2_SCANF_STD); \ |
887 | } while (0) |
888 | #endif |
889 | |
890 | /* Collect all vtables in a special section for vtable verification. |
891 | These symbols cover the extent of this section. */ |
892 | symbol_set_declare (__libc_IO_vtables) |
893 | |
894 | /* libio vtables need to carry this attribute so that they pass |
895 | validation. */ |
896 | #define libio_vtable __attribute__ ((section ("__libc_IO_vtables"))) |
897 | |
898 | #ifdef SHARED |
899 | /* If equal to &_IO_vtable_check (with pointer guard protection), |
900 | unknown vtable pointers are valid. This function pointer is solely |
901 | used as a flag. */ |
902 | extern void (*IO_accept_foreign_vtables) (void) attribute_hidden; |
903 | |
904 | /* Assigns the passed function pointer (either NULL or |
905 | &_IO_vtable_check) to IO_accept_foreign_vtables. */ |
906 | static inline void |
907 | IO_set_accept_foreign_vtables (void (*flag) (void)) |
908 | { |
909 | #ifdef PTR_MANGLE |
910 | PTR_MANGLE (flag); |
911 | #endif |
912 | atomic_store_relaxed (&IO_accept_foreign_vtables, flag); |
913 | } |
914 | |
915 | #else /* !SHARED */ |
916 | |
917 | /* The statically-linked version does nothing. */ |
918 | static inline void |
919 | IO_set_accept_foreign_vtables (void (*flag) (void)) |
920 | { |
921 | } |
922 | |
923 | #endif |
924 | |
925 | /* Check if unknown vtable pointers are permitted; otherwise, |
926 | terminate the process. */ |
927 | void _IO_vtable_check (void) attribute_hidden; |
928 | |
929 | /* Perform vtable pointer validation. If validation fails, terminate |
930 | the process. */ |
931 | static inline const struct _IO_jump_t * |
932 | IO_validate_vtable (const struct _IO_jump_t *vtable) |
933 | { |
934 | /* Fast path: The vtable pointer is within the __libc_IO_vtables |
935 | section. */ |
936 | uintptr_t section_length = __stop___libc_IO_vtables - __start___libc_IO_vtables; |
937 | const char *ptr = (const char *) vtable; |
938 | uintptr_t offset = ptr - __start___libc_IO_vtables; |
939 | if (__glibc_unlikely (offset >= section_length)) |
940 | /* The vtable pointer is not in the expected section. Use the |
941 | slow path, which will terminate the process if necessary. */ |
942 | _IO_vtable_check (); |
943 | return vtable; |
944 | } |
945 | |