1 | /* Copyright (C) 1991-2017 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 | /* |
19 | * ISO C99 Standard: 7.20 General utilities <stdlib.h> |
20 | */ |
21 | |
22 | #ifndef _STDLIB_H |
23 | |
24 | #define |
25 | #include <bits/libc-header-start.h> |
26 | |
27 | /* Get size_t, wchar_t and NULL from <stddef.h>. */ |
28 | #define __need_size_t |
29 | #define __need_wchar_t |
30 | #define __need_NULL |
31 | #include <stddef.h> |
32 | |
33 | __BEGIN_DECLS |
34 | |
35 | #define _STDLIB_H 1 |
36 | |
37 | #if (defined __USE_XOPEN || defined __USE_XOPEN2K8) && !defined _SYS_WAIT_H |
38 | /* XPG requires a few symbols from <sys/wait.h> being defined. */ |
39 | # include <bits/waitflags.h> |
40 | # include <bits/waitstatus.h> |
41 | |
42 | /* Define the macros <sys/wait.h> also would define this way. */ |
43 | # define WEXITSTATUS(status) __WEXITSTATUS (status) |
44 | # define WTERMSIG(status) __WTERMSIG (status) |
45 | # define WSTOPSIG(status) __WSTOPSIG (status) |
46 | # define WIFEXITED(status) __WIFEXITED (status) |
47 | # define WIFSIGNALED(status) __WIFSIGNALED (status) |
48 | # define WIFSTOPPED(status) __WIFSTOPPED (status) |
49 | # ifdef __WIFCONTINUED |
50 | # define WIFCONTINUED(status) __WIFCONTINUED (status) |
51 | # endif |
52 | #endif /* X/Open or XPG7 and <sys/wait.h> not included. */ |
53 | |
54 | /* _FloatN API tests for enablement. */ |
55 | #include <bits/floatn.h> |
56 | |
57 | /* Returned by `div'. */ |
58 | typedef struct |
59 | { |
60 | int quot; /* Quotient. */ |
61 | int rem; /* Remainder. */ |
62 | } div_t; |
63 | |
64 | /* Returned by `ldiv'. */ |
65 | #ifndef __ldiv_t_defined |
66 | typedef struct |
67 | { |
68 | long int quot; /* Quotient. */ |
69 | long int rem; /* Remainder. */ |
70 | } ldiv_t; |
71 | # define __ldiv_t_defined 1 |
72 | #endif |
73 | |
74 | #if defined __USE_ISOC99 && !defined __lldiv_t_defined |
75 | /* Returned by `lldiv'. */ |
76 | __extension__ typedef struct |
77 | { |
78 | long long int quot; /* Quotient. */ |
79 | long long int rem; /* Remainder. */ |
80 | } lldiv_t; |
81 | # define __lldiv_t_defined 1 |
82 | #endif |
83 | |
84 | |
85 | /* The largest number rand will return (same as INT_MAX). */ |
86 | #define RAND_MAX 2147483647 |
87 | |
88 | |
89 | /* We define these the same for all machines. |
90 | Changes from this to the outside world should be done in `_exit'. */ |
91 | #define EXIT_FAILURE 1 /* Failing exit status. */ |
92 | #define EXIT_SUCCESS 0 /* Successful exit status. */ |
93 | |
94 | |
95 | /* Maximum length of a multibyte character in the current locale. */ |
96 | #define MB_CUR_MAX (__ctype_get_mb_cur_max ()) |
97 | extern size_t __ctype_get_mb_cur_max (void) __THROW __wur; |
98 | |
99 | |
100 | /* Convert a string to a floating-point number. */ |
101 | extern double atof (const char *__nptr) |
102 | __THROW __attribute_pure__ __nonnull ((1)) __wur; |
103 | /* Convert a string to an integer. */ |
104 | extern int atoi (const char *__nptr) |
105 | __THROW __attribute_pure__ __nonnull ((1)) __wur; |
106 | /* Convert a string to a long integer. */ |
107 | extern long int atol (const char *__nptr) |
108 | __THROW __attribute_pure__ __nonnull ((1)) __wur; |
109 | |
110 | #ifdef __USE_ISOC99 |
111 | /* Convert a string to a long long integer. */ |
112 | __extension__ extern long long int atoll (const char *__nptr) |
113 | __THROW __attribute_pure__ __nonnull ((1)) __wur; |
114 | #endif |
115 | |
116 | /* Convert a string to a floating-point number. */ |
117 | extern double strtod (const char *__restrict __nptr, |
118 | char **__restrict __endptr) |
119 | __THROW __nonnull ((1)); |
120 | |
121 | #ifdef __USE_ISOC99 |
122 | /* Likewise for `float' and `long double' sizes of floating-point numbers. */ |
123 | extern float strtof (const char *__restrict __nptr, |
124 | char **__restrict __endptr) __THROW __nonnull ((1)); |
125 | |
126 | extern long double strtold (const char *__restrict __nptr, |
127 | char **__restrict __endptr) |
128 | __THROW __nonnull ((1)); |
129 | #endif |
130 | |
131 | #if __HAVE_FLOAT128 && __GLIBC_USE (IEC_60559_TYPES_EXT) |
132 | /* Likewise for the '_Float128' format */ |
133 | extern _Float128 strtof128 (const char *__restrict __nptr, |
134 | char **__restrict __endptr) |
135 | __THROW __nonnull ((1)); |
136 | #endif |
137 | |
138 | /* Convert a string to a long integer. */ |
139 | extern long int strtol (const char *__restrict __nptr, |
140 | char **__restrict __endptr, int __base) |
141 | __THROW __nonnull ((1)); |
142 | /* Convert a string to an unsigned long integer. */ |
143 | extern unsigned long int strtoul (const char *__restrict __nptr, |
144 | char **__restrict __endptr, int __base) |
145 | __THROW __nonnull ((1)); |
146 | |
147 | #ifdef __USE_MISC |
148 | /* Convert a string to a quadword integer. */ |
149 | __extension__ |
150 | extern long long int strtoq (const char *__restrict __nptr, |
151 | char **__restrict __endptr, int __base) |
152 | __THROW __nonnull ((1)); |
153 | /* Convert a string to an unsigned quadword integer. */ |
154 | __extension__ |
155 | extern unsigned long long int strtouq (const char *__restrict __nptr, |
156 | char **__restrict __endptr, int __base) |
157 | __THROW __nonnull ((1)); |
158 | #endif /* Use misc. */ |
159 | |
160 | #ifdef __USE_ISOC99 |
161 | /* Convert a string to a quadword integer. */ |
162 | __extension__ |
163 | extern long long int strtoll (const char *__restrict __nptr, |
164 | char **__restrict __endptr, int __base) |
165 | __THROW __nonnull ((1)); |
166 | /* Convert a string to an unsigned quadword integer. */ |
167 | __extension__ |
168 | extern unsigned long long int strtoull (const char *__restrict __nptr, |
169 | char **__restrict __endptr, int __base) |
170 | __THROW __nonnull ((1)); |
171 | #endif /* ISO C99 or use MISC. */ |
172 | |
173 | /* Convert a floating-point number to a string. */ |
174 | #if __GLIBC_USE (IEC_60559_BFP_EXT) |
175 | extern int strfromd (char *__dest, size_t __size, const char *__format, |
176 | double __f) |
177 | __THROW __nonnull ((3)); |
178 | |
179 | extern int strfromf (char *__dest, size_t __size, const char *__format, |
180 | float __f) |
181 | __THROW __nonnull ((3)); |
182 | |
183 | extern int strfroml (char *__dest, size_t __size, const char *__format, |
184 | long double __f) |
185 | __THROW __nonnull ((3)); |
186 | #endif |
187 | |
188 | #if __HAVE_FLOAT128 && __GLIBC_USE (IEC_60559_TYPES_EXT) |
189 | extern int strfromf128 (char *__dest, size_t __size, const char * __format, |
190 | _Float128 __f) |
191 | __THROW __nonnull ((3)); |
192 | #endif |
193 | |
194 | |
195 | #ifdef __USE_GNU |
196 | /* Parallel versions of the functions above which take the locale to |
197 | use as an additional parameter. These are GNU extensions inspired |
198 | by the POSIX.1-2008 extended locale API. */ |
199 | # include <bits/types/locale_t.h> |
200 | |
201 | extern long int strtol_l (const char *__restrict __nptr, |
202 | char **__restrict __endptr, int __base, |
203 | locale_t __loc) __THROW __nonnull ((1, 4)); |
204 | |
205 | extern unsigned long int strtoul_l (const char *__restrict __nptr, |
206 | char **__restrict __endptr, |
207 | int __base, locale_t __loc) |
208 | __THROW __nonnull ((1, 4)); |
209 | |
210 | __extension__ |
211 | extern long long int strtoll_l (const char *__restrict __nptr, |
212 | char **__restrict __endptr, int __base, |
213 | locale_t __loc) |
214 | __THROW __nonnull ((1, 4)); |
215 | |
216 | __extension__ |
217 | extern unsigned long long int strtoull_l (const char *__restrict __nptr, |
218 | char **__restrict __endptr, |
219 | int __base, locale_t __loc) |
220 | __THROW __nonnull ((1, 4)); |
221 | |
222 | extern double strtod_l (const char *__restrict __nptr, |
223 | char **__restrict __endptr, locale_t __loc) |
224 | __THROW __nonnull ((1, 3)); |
225 | |
226 | extern float strtof_l (const char *__restrict __nptr, |
227 | char **__restrict __endptr, locale_t __loc) |
228 | __THROW __nonnull ((1, 3)); |
229 | |
230 | extern long double strtold_l (const char *__restrict __nptr, |
231 | char **__restrict __endptr, |
232 | locale_t __loc) |
233 | __THROW __nonnull ((1, 3)); |
234 | |
235 | # if __HAVE_FLOAT128 |
236 | extern _Float128 strtof128_l (const char *__restrict __nptr, |
237 | char **__restrict __endptr, |
238 | locale_t __loc) |
239 | __THROW __nonnull ((1, 3)); |
240 | # endif |
241 | #endif /* GNU */ |
242 | |
243 | |
244 | #ifdef __USE_EXTERN_INLINES |
245 | __extern_inline int |
246 | __NTH (atoi (const char *__nptr)) |
247 | { |
248 | return (int) strtol (__nptr, (char **) NULL, 10); |
249 | } |
250 | __extern_inline long int |
251 | __NTH (atol (const char *__nptr)) |
252 | { |
253 | return strtol (__nptr, (char **) NULL, 10); |
254 | } |
255 | |
256 | # ifdef __USE_ISOC99 |
257 | __extension__ __extern_inline long long int |
258 | __NTH (atoll (const char *__nptr)) |
259 | { |
260 | return strtoll (__nptr, (char **) NULL, 10); |
261 | } |
262 | # endif |
263 | #endif /* Optimizing and Inlining. */ |
264 | |
265 | |
266 | #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED |
267 | /* Convert N to base 64 using the digits "./0-9A-Za-z", least-significant |
268 | digit first. Returns a pointer to static storage overwritten by the |
269 | next call. */ |
270 | extern char *l64a (long int __n) __THROW __wur; |
271 | |
272 | /* Read a number from a string S in base 64 as above. */ |
273 | extern long int a64l (const char *__s) |
274 | __THROW __attribute_pure__ __nonnull ((1)) __wur; |
275 | |
276 | #endif /* Use misc || extended X/Open. */ |
277 | |
278 | #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED |
279 | # include <sys/types.h> /* we need int32_t... */ |
280 | |
281 | /* These are the functions that actually do things. The `random', `srandom', |
282 | `initstate' and `setstate' functions are those from BSD Unices. |
283 | The `rand' and `srand' functions are required by the ANSI standard. |
284 | We provide both interfaces to the same random number generator. */ |
285 | /* Return a random long integer between 0 and RAND_MAX inclusive. */ |
286 | extern long int random (void) __THROW; |
287 | |
288 | /* Seed the random number generator with the given number. */ |
289 | extern void srandom (unsigned int __seed) __THROW; |
290 | |
291 | /* Initialize the random number generator to use state buffer STATEBUF, |
292 | of length STATELEN, and seed it with SEED. Optimal lengths are 8, 16, |
293 | 32, 64, 128 and 256, the bigger the better; values less than 8 will |
294 | cause an error and values greater than 256 will be rounded down. */ |
295 | extern char *initstate (unsigned int __seed, char *__statebuf, |
296 | size_t __statelen) __THROW __nonnull ((2)); |
297 | |
298 | /* Switch the random number generator to state buffer STATEBUF, |
299 | which should have been previously initialized by `initstate'. */ |
300 | extern char *setstate (char *__statebuf) __THROW __nonnull ((1)); |
301 | |
302 | |
303 | # ifdef __USE_MISC |
304 | /* Reentrant versions of the `random' family of functions. |
305 | These functions all use the following data structure to contain |
306 | state, rather than global state variables. */ |
307 | |
308 | struct random_data |
309 | { |
310 | int32_t *fptr; /* Front pointer. */ |
311 | int32_t *rptr; /* Rear pointer. */ |
312 | int32_t *state; /* Array of state values. */ |
313 | int rand_type; /* Type of random number generator. */ |
314 | int rand_deg; /* Degree of random number generator. */ |
315 | int rand_sep; /* Distance between front and rear. */ |
316 | int32_t *end_ptr; /* Pointer behind state table. */ |
317 | }; |
318 | |
319 | extern int random_r (struct random_data *__restrict __buf, |
320 | int32_t *__restrict __result) __THROW __nonnull ((1, 2)); |
321 | |
322 | extern int srandom_r (unsigned int __seed, struct random_data *__buf) |
323 | __THROW __nonnull ((2)); |
324 | |
325 | extern int initstate_r (unsigned int __seed, char *__restrict __statebuf, |
326 | size_t __statelen, |
327 | struct random_data *__restrict __buf) |
328 | __THROW __nonnull ((2, 4)); |
329 | |
330 | extern int setstate_r (char *__restrict __statebuf, |
331 | struct random_data *__restrict __buf) |
332 | __THROW __nonnull ((1, 2)); |
333 | # endif /* Use misc. */ |
334 | #endif /* Use extended X/Open || misc. */ |
335 | |
336 | |
337 | /* Return a random integer between 0 and RAND_MAX inclusive. */ |
338 | extern int rand (void) __THROW; |
339 | /* Seed the random number generator with the given number. */ |
340 | extern void srand (unsigned int __seed) __THROW; |
341 | |
342 | #ifdef __USE_POSIX199506 |
343 | /* Reentrant interface according to POSIX.1. */ |
344 | extern int rand_r (unsigned int *__seed) __THROW; |
345 | #endif |
346 | |
347 | |
348 | #if defined __USE_MISC || defined __USE_XOPEN |
349 | /* System V style 48-bit random number generator functions. */ |
350 | |
351 | /* Return non-negative, double-precision floating-point value in [0.0,1.0). */ |
352 | extern double drand48 (void) __THROW; |
353 | extern double erand48 (unsigned short int __xsubi[3]) __THROW __nonnull ((1)); |
354 | |
355 | /* Return non-negative, long integer in [0,2^31). */ |
356 | extern long int lrand48 (void) __THROW; |
357 | extern long int nrand48 (unsigned short int __xsubi[3]) |
358 | __THROW __nonnull ((1)); |
359 | |
360 | /* Return signed, long integers in [-2^31,2^31). */ |
361 | extern long int mrand48 (void) __THROW; |
362 | extern long int jrand48 (unsigned short int __xsubi[3]) |
363 | __THROW __nonnull ((1)); |
364 | |
365 | /* Seed random number generator. */ |
366 | extern void srand48 (long int __seedval) __THROW; |
367 | extern unsigned short int *seed48 (unsigned short int __seed16v[3]) |
368 | __THROW __nonnull ((1)); |
369 | extern void lcong48 (unsigned short int __param[7]) __THROW __nonnull ((1)); |
370 | |
371 | # ifdef __USE_MISC |
372 | /* Data structure for communication with thread safe versions. This |
373 | type is to be regarded as opaque. It's only exported because users |
374 | have to allocate objects of this type. */ |
375 | struct drand48_data |
376 | { |
377 | unsigned short int __x[3]; /* Current state. */ |
378 | unsigned short int __old_x[3]; /* Old state. */ |
379 | unsigned short int __c; /* Additive const. in congruential formula. */ |
380 | unsigned short int __init; /* Flag for initializing. */ |
381 | __extension__ unsigned long long int __a; /* Factor in congruential |
382 | formula. */ |
383 | }; |
384 | |
385 | /* Return non-negative, double-precision floating-point value in [0.0,1.0). */ |
386 | extern int drand48_r (struct drand48_data *__restrict __buffer, |
387 | double *__restrict __result) __THROW __nonnull ((1, 2)); |
388 | extern int erand48_r (unsigned short int __xsubi[3], |
389 | struct drand48_data *__restrict __buffer, |
390 | double *__restrict __result) __THROW __nonnull ((1, 2)); |
391 | |
392 | /* Return non-negative, long integer in [0,2^31). */ |
393 | extern int lrand48_r (struct drand48_data *__restrict __buffer, |
394 | long int *__restrict __result) |
395 | __THROW __nonnull ((1, 2)); |
396 | extern int nrand48_r (unsigned short int __xsubi[3], |
397 | struct drand48_data *__restrict __buffer, |
398 | long int *__restrict __result) |
399 | __THROW __nonnull ((1, 2)); |
400 | |
401 | /* Return signed, long integers in [-2^31,2^31). */ |
402 | extern int mrand48_r (struct drand48_data *__restrict __buffer, |
403 | long int *__restrict __result) |
404 | __THROW __nonnull ((1, 2)); |
405 | extern int jrand48_r (unsigned short int __xsubi[3], |
406 | struct drand48_data *__restrict __buffer, |
407 | long int *__restrict __result) |
408 | __THROW __nonnull ((1, 2)); |
409 | |
410 | /* Seed random number generator. */ |
411 | extern int srand48_r (long int __seedval, struct drand48_data *__buffer) |
412 | __THROW __nonnull ((2)); |
413 | |
414 | extern int seed48_r (unsigned short int __seed16v[3], |
415 | struct drand48_data *__buffer) __THROW __nonnull ((1, 2)); |
416 | |
417 | extern int lcong48_r (unsigned short int __param[7], |
418 | struct drand48_data *__buffer) |
419 | __THROW __nonnull ((1, 2)); |
420 | # endif /* Use misc. */ |
421 | #endif /* Use misc or X/Open. */ |
422 | |
423 | /* Allocate SIZE bytes of memory. */ |
424 | extern void *malloc (size_t __size) __THROW __attribute_malloc__ __wur; |
425 | /* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */ |
426 | extern void *calloc (size_t __nmemb, size_t __size) |
427 | __THROW __attribute_malloc__ __wur; |
428 | |
429 | /* Re-allocate the previously allocated block |
430 | in PTR, making the new block SIZE bytes long. */ |
431 | /* __attribute_malloc__ is not used, because if realloc returns |
432 | the same pointer that was passed to it, aliasing needs to be allowed |
433 | between objects pointed by the old and new pointers. */ |
434 | extern void *realloc (void *__ptr, size_t __size) |
435 | __THROW __attribute_warn_unused_result__; |
436 | |
437 | #ifdef __USE_GNU |
438 | /* Re-allocate the previously allocated block in PTR, making the new |
439 | block large enough for NMEMB elements of SIZE bytes each. */ |
440 | /* __attribute_malloc__ is not used, because if reallocarray returns |
441 | the same pointer that was passed to it, aliasing needs to be allowed |
442 | between objects pointed by the old and new pointers. */ |
443 | extern void *reallocarray (void *__ptr, size_t __nmemb, size_t __size) |
444 | __THROW __attribute_warn_unused_result__; |
445 | #endif |
446 | |
447 | /* Free a block allocated by `malloc', `realloc' or `calloc'. */ |
448 | extern void free (void *__ptr) __THROW; |
449 | |
450 | #ifdef __USE_MISC |
451 | # include <alloca.h> |
452 | #endif /* Use misc. */ |
453 | |
454 | #if (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K) \ |
455 | || defined __USE_MISC |
456 | /* Allocate SIZE bytes on a page boundary. The storage cannot be freed. */ |
457 | extern void *valloc (size_t __size) __THROW __attribute_malloc__ __wur; |
458 | #endif |
459 | |
460 | #ifdef __USE_XOPEN2K |
461 | /* Allocate memory of SIZE bytes with an alignment of ALIGNMENT. */ |
462 | extern int posix_memalign (void **__memptr, size_t __alignment, size_t __size) |
463 | __THROW __nonnull ((1)) __wur; |
464 | #endif |
465 | |
466 | #ifdef __USE_ISOC11 |
467 | /* ISO C variant of aligned allocation. */ |
468 | extern void *aligned_alloc (size_t __alignment, size_t __size) |
469 | __THROW __attribute_malloc__ __attribute_alloc_size__ ((2)) __wur; |
470 | #endif |
471 | |
472 | /* Abort execution and generate a core-dump. */ |
473 | extern void abort (void) __THROW __attribute__ ((__noreturn__)); |
474 | |
475 | |
476 | /* Register a function to be called when `exit' is called. */ |
477 | extern int atexit (void (*__func) (void)) __THROW __nonnull ((1)); |
478 | |
479 | #if defined __USE_ISOC11 || defined __USE_ISOCXX11 |
480 | /* Register a function to be called when `quick_exit' is called. */ |
481 | # ifdef __cplusplus |
482 | extern "C++" int at_quick_exit (void (*__func) (void)) |
483 | __THROW __asm ("at_quick_exit" ) __nonnull ((1)); |
484 | # else |
485 | extern int at_quick_exit (void (*__func) (void)) __THROW __nonnull ((1)); |
486 | # endif |
487 | #endif |
488 | |
489 | #ifdef __USE_MISC |
490 | /* Register a function to be called with the status |
491 | given to `exit' and the given argument. */ |
492 | extern int on_exit (void (*__func) (int __status, void *__arg), void *__arg) |
493 | __THROW __nonnull ((1)); |
494 | #endif |
495 | |
496 | /* Call all functions registered with `atexit' and `on_exit', |
497 | in the reverse of the order in which they were registered, |
498 | perform stdio cleanup, and terminate program execution with STATUS. */ |
499 | extern void exit (int __status) __THROW __attribute__ ((__noreturn__)); |
500 | |
501 | #if defined __USE_ISOC11 || defined __USE_ISOCXX11 |
502 | /* Call all functions registered with `at_quick_exit' in the reverse |
503 | of the order in which they were registered and terminate program |
504 | execution with STATUS. */ |
505 | extern void quick_exit (int __status) __THROW __attribute__ ((__noreturn__)); |
506 | #endif |
507 | |
508 | #ifdef __USE_ISOC99 |
509 | /* Terminate the program with STATUS without calling any of the |
510 | functions registered with `atexit' or `on_exit'. */ |
511 | extern void _Exit (int __status) __THROW __attribute__ ((__noreturn__)); |
512 | #endif |
513 | |
514 | |
515 | /* Return the value of envariable NAME, or NULL if it doesn't exist. */ |
516 | extern char *getenv (const char *__name) __THROW __nonnull ((1)) __wur; |
517 | |
518 | #ifdef __USE_GNU |
519 | /* This function is similar to the above but returns NULL if the |
520 | programs is running with SUID or SGID enabled. */ |
521 | extern char *secure_getenv (const char *__name) |
522 | __THROW __nonnull ((1)) __wur; |
523 | #endif |
524 | |
525 | #if defined __USE_MISC || defined __USE_XOPEN |
526 | /* The SVID says this is in <stdio.h>, but this seems a better place. */ |
527 | /* Put STRING, which is of the form "NAME=VALUE", in the environment. |
528 | If there is no `=', remove NAME from the environment. */ |
529 | extern int putenv (char *__string) __THROW __nonnull ((1)); |
530 | #endif |
531 | |
532 | #ifdef __USE_XOPEN2K |
533 | /* Set NAME to VALUE in the environment. |
534 | If REPLACE is nonzero, overwrite an existing value. */ |
535 | extern int setenv (const char *__name, const char *__value, int __replace) |
536 | __THROW __nonnull ((2)); |
537 | |
538 | /* Remove the variable NAME from the environment. */ |
539 | extern int unsetenv (const char *__name) __THROW __nonnull ((1)); |
540 | #endif |
541 | |
542 | #ifdef __USE_MISC |
543 | /* The `clearenv' was planned to be added to POSIX.1 but probably |
544 | never made it. Nevertheless the POSIX.9 standard (POSIX bindings |
545 | for Fortran 77) requires this function. */ |
546 | extern int clearenv (void) __THROW; |
547 | #endif |
548 | |
549 | |
550 | #if defined __USE_MISC \ |
551 | || (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K8) |
552 | /* Generate a unique temporary file name from TEMPLATE. |
553 | The last six characters of TEMPLATE must be "XXXXXX"; |
554 | they are replaced with a string that makes the file name unique. |
555 | Always returns TEMPLATE, it's either a temporary file name or a null |
556 | string if it cannot get a unique file name. */ |
557 | extern char *mktemp (char *__template) __THROW __nonnull ((1)); |
558 | #endif |
559 | |
560 | #if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8 |
561 | /* Generate a unique temporary file name from TEMPLATE. |
562 | The last six characters of TEMPLATE must be "XXXXXX"; |
563 | they are replaced with a string that makes the filename unique. |
564 | Returns a file descriptor open on the file for reading and writing, |
565 | or -1 if it cannot create a uniquely-named file. |
566 | |
567 | This function is a possible cancellation point and therefore not |
568 | marked with __THROW. */ |
569 | # ifndef __USE_FILE_OFFSET64 |
570 | extern int mkstemp (char *__template) __nonnull ((1)) __wur; |
571 | # else |
572 | # ifdef __REDIRECT |
573 | extern int __REDIRECT (mkstemp, (char *__template), mkstemp64) |
574 | __nonnull ((1)) __wur; |
575 | # else |
576 | # define mkstemp mkstemp64 |
577 | # endif |
578 | # endif |
579 | # ifdef __USE_LARGEFILE64 |
580 | extern int mkstemp64 (char *__template) __nonnull ((1)) __wur; |
581 | # endif |
582 | #endif |
583 | |
584 | #ifdef __USE_MISC |
585 | /* Similar to mkstemp, but the template can have a suffix after the |
586 | XXXXXX. The length of the suffix is specified in the second |
587 | parameter. |
588 | |
589 | This function is a possible cancellation point and therefore not |
590 | marked with __THROW. */ |
591 | # ifndef __USE_FILE_OFFSET64 |
592 | extern int mkstemps (char *__template, int __suffixlen) __nonnull ((1)) __wur; |
593 | # else |
594 | # ifdef __REDIRECT |
595 | extern int __REDIRECT (mkstemps, (char *__template, int __suffixlen), |
596 | mkstemps64) __nonnull ((1)) __wur; |
597 | # else |
598 | # define mkstemps mkstemps64 |
599 | # endif |
600 | # endif |
601 | # ifdef __USE_LARGEFILE64 |
602 | extern int mkstemps64 (char *__template, int __suffixlen) |
603 | __nonnull ((1)) __wur; |
604 | # endif |
605 | #endif |
606 | |
607 | #ifdef __USE_XOPEN2K8 |
608 | /* Create a unique temporary directory from TEMPLATE. |
609 | The last six characters of TEMPLATE must be "XXXXXX"; |
610 | they are replaced with a string that makes the directory name unique. |
611 | Returns TEMPLATE, or a null pointer if it cannot get a unique name. |
612 | The directory is created mode 700. */ |
613 | extern char *mkdtemp (char *__template) __THROW __nonnull ((1)) __wur; |
614 | #endif |
615 | |
616 | #ifdef __USE_GNU |
617 | /* Generate a unique temporary file name from TEMPLATE similar to |
618 | mkstemp. But allow the caller to pass additional flags which are |
619 | used in the open call to create the file.. |
620 | |
621 | This function is a possible cancellation point and therefore not |
622 | marked with __THROW. */ |
623 | # ifndef __USE_FILE_OFFSET64 |
624 | extern int mkostemp (char *__template, int __flags) __nonnull ((1)) __wur; |
625 | # else |
626 | # ifdef __REDIRECT |
627 | extern int __REDIRECT (mkostemp, (char *__template, int __flags), mkostemp64) |
628 | __nonnull ((1)) __wur; |
629 | # else |
630 | # define mkostemp mkostemp64 |
631 | # endif |
632 | # endif |
633 | # ifdef __USE_LARGEFILE64 |
634 | extern int mkostemp64 (char *__template, int __flags) __nonnull ((1)) __wur; |
635 | # endif |
636 | |
637 | /* Similar to mkostemp, but the template can have a suffix after the |
638 | XXXXXX. The length of the suffix is specified in the second |
639 | parameter. |
640 | |
641 | This function is a possible cancellation point and therefore not |
642 | marked with __THROW. */ |
643 | # ifndef __USE_FILE_OFFSET64 |
644 | extern int mkostemps (char *__template, int __suffixlen, int __flags) |
645 | __nonnull ((1)) __wur; |
646 | # else |
647 | # ifdef __REDIRECT |
648 | extern int __REDIRECT (mkostemps, (char *__template, int __suffixlen, |
649 | int __flags), mkostemps64) |
650 | __nonnull ((1)) __wur; |
651 | # else |
652 | # define mkostemps mkostemps64 |
653 | # endif |
654 | # endif |
655 | # ifdef __USE_LARGEFILE64 |
656 | extern int mkostemps64 (char *__template, int __suffixlen, int __flags) |
657 | __nonnull ((1)) __wur; |
658 | # endif |
659 | #endif |
660 | |
661 | |
662 | /* Execute the given line as a shell command. |
663 | |
664 | This function is a cancellation point and therefore not marked with |
665 | __THROW. */ |
666 | extern int system (const char *__command) __wur; |
667 | |
668 | |
669 | #ifdef __USE_GNU |
670 | /* Return a malloc'd string containing the canonical absolute name of the |
671 | existing named file. */ |
672 | extern char *canonicalize_file_name (const char *__name) |
673 | __THROW __nonnull ((1)) __wur; |
674 | #endif |
675 | |
676 | #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED |
677 | /* Return the canonical absolute name of file NAME. If RESOLVED is |
678 | null, the result is malloc'd; otherwise, if the canonical name is |
679 | PATH_MAX chars or more, returns null with `errno' set to |
680 | ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars, |
681 | returns the name in RESOLVED. */ |
682 | extern char *realpath (const char *__restrict __name, |
683 | char *__restrict __resolved) __THROW __wur; |
684 | #endif |
685 | |
686 | |
687 | /* Shorthand for type of comparison functions. */ |
688 | #ifndef __COMPAR_FN_T |
689 | # define __COMPAR_FN_T |
690 | typedef int (*__compar_fn_t) (const void *, const void *); |
691 | |
692 | # ifdef __USE_GNU |
693 | typedef __compar_fn_t comparison_fn_t; |
694 | # endif |
695 | #endif |
696 | #ifdef __USE_GNU |
697 | typedef int (*__compar_d_fn_t) (const void *, const void *, void *); |
698 | #endif |
699 | |
700 | /* Do a binary search for KEY in BASE, which consists of NMEMB elements |
701 | of SIZE bytes each, using COMPAR to perform the comparisons. */ |
702 | extern void *bsearch (const void *__key, const void *__base, |
703 | size_t __nmemb, size_t __size, __compar_fn_t __compar) |
704 | __nonnull ((1, 2, 5)) __wur; |
705 | |
706 | #ifdef __USE_EXTERN_INLINES |
707 | # include <bits/stdlib-bsearch.h> |
708 | #endif |
709 | |
710 | /* Sort NMEMB elements of BASE, of SIZE bytes each, |
711 | using COMPAR to perform the comparisons. */ |
712 | extern void qsort (void *__base, size_t __nmemb, size_t __size, |
713 | __compar_fn_t __compar) __nonnull ((1, 4)); |
714 | #ifdef __USE_GNU |
715 | extern void qsort_r (void *__base, size_t __nmemb, size_t __size, |
716 | __compar_d_fn_t __compar, void *__arg) |
717 | __nonnull ((1, 4)); |
718 | #endif |
719 | |
720 | |
721 | /* Return the absolute value of X. */ |
722 | extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur; |
723 | extern long int labs (long int __x) __THROW __attribute__ ((__const__)) __wur; |
724 | |
725 | #ifdef __USE_ISOC99 |
726 | __extension__ extern long long int llabs (long long int __x) |
727 | __THROW __attribute__ ((__const__)) __wur; |
728 | #endif |
729 | |
730 | |
731 | /* Return the `div_t', `ldiv_t' or `lldiv_t' representation |
732 | of the value of NUMER over DENOM. */ |
733 | /* GCC may have built-ins for these someday. */ |
734 | extern div_t div (int __numer, int __denom) |
735 | __THROW __attribute__ ((__const__)) __wur; |
736 | extern ldiv_t ldiv (long int __numer, long int __denom) |
737 | __THROW __attribute__ ((__const__)) __wur; |
738 | |
739 | #ifdef __USE_ISOC99 |
740 | __extension__ extern lldiv_t lldiv (long long int __numer, |
741 | long long int __denom) |
742 | __THROW __attribute__ ((__const__)) __wur; |
743 | #endif |
744 | |
745 | |
746 | #if (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K8) \ |
747 | || defined __USE_MISC |
748 | /* Convert floating point numbers to strings. The returned values are |
749 | valid only until another call to the same function. */ |
750 | |
751 | /* Convert VALUE to a string with NDIGIT digits and return a pointer to |
752 | this. Set *DECPT with the position of the decimal character and *SIGN |
753 | with the sign of the number. */ |
754 | extern char *ecvt (double __value, int __ndigit, int *__restrict __decpt, |
755 | int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur; |
756 | |
757 | /* Convert VALUE to a string rounded to NDIGIT decimal digits. Set *DECPT |
758 | with the position of the decimal character and *SIGN with the sign of |
759 | the number. */ |
760 | extern char *fcvt (double __value, int __ndigit, int *__restrict __decpt, |
761 | int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur; |
762 | |
763 | /* If possible convert VALUE to a string with NDIGIT significant digits. |
764 | Otherwise use exponential representation. The resulting string will |
765 | be written to BUF. */ |
766 | extern char *gcvt (double __value, int __ndigit, char *__buf) |
767 | __THROW __nonnull ((3)) __wur; |
768 | #endif |
769 | |
770 | #ifdef __USE_MISC |
771 | /* Long double versions of above functions. */ |
772 | extern char *qecvt (long double __value, int __ndigit, |
773 | int *__restrict __decpt, int *__restrict __sign) |
774 | __THROW __nonnull ((3, 4)) __wur; |
775 | extern char *qfcvt (long double __value, int __ndigit, |
776 | int *__restrict __decpt, int *__restrict __sign) |
777 | __THROW __nonnull ((3, 4)) __wur; |
778 | extern char *qgcvt (long double __value, int __ndigit, char *__buf) |
779 | __THROW __nonnull ((3)) __wur; |
780 | |
781 | |
782 | /* Reentrant version of the functions above which provide their own |
783 | buffers. */ |
784 | extern int ecvt_r (double __value, int __ndigit, int *__restrict __decpt, |
785 | int *__restrict __sign, char *__restrict __buf, |
786 | size_t __len) __THROW __nonnull ((3, 4, 5)); |
787 | extern int fcvt_r (double __value, int __ndigit, int *__restrict __decpt, |
788 | int *__restrict __sign, char *__restrict __buf, |
789 | size_t __len) __THROW __nonnull ((3, 4, 5)); |
790 | |
791 | extern int qecvt_r (long double __value, int __ndigit, |
792 | int *__restrict __decpt, int *__restrict __sign, |
793 | char *__restrict __buf, size_t __len) |
794 | __THROW __nonnull ((3, 4, 5)); |
795 | extern int qfcvt_r (long double __value, int __ndigit, |
796 | int *__restrict __decpt, int *__restrict __sign, |
797 | char *__restrict __buf, size_t __len) |
798 | __THROW __nonnull ((3, 4, 5)); |
799 | #endif /* misc */ |
800 | |
801 | |
802 | /* Return the length of the multibyte character |
803 | in S, which is no longer than N. */ |
804 | extern int mblen (const char *__s, size_t __n) __THROW; |
805 | /* Return the length of the given multibyte character, |
806 | putting its `wchar_t' representation in *PWC. */ |
807 | extern int mbtowc (wchar_t *__restrict __pwc, |
808 | const char *__restrict __s, size_t __n) __THROW; |
809 | /* Put the multibyte character represented |
810 | by WCHAR in S, returning its length. */ |
811 | extern int wctomb (char *__s, wchar_t __wchar) __THROW; |
812 | |
813 | |
814 | /* Convert a multibyte string to a wide char string. */ |
815 | extern size_t mbstowcs (wchar_t *__restrict __pwcs, |
816 | const char *__restrict __s, size_t __n) __THROW; |
817 | /* Convert a wide char string to multibyte string. */ |
818 | extern size_t wcstombs (char *__restrict __s, |
819 | const wchar_t *__restrict __pwcs, size_t __n) |
820 | __THROW; |
821 | |
822 | |
823 | #ifdef __USE_MISC |
824 | /* Determine whether the string value of RESPONSE matches the affirmation |
825 | or negative response expression as specified by the LC_MESSAGES category |
826 | in the program's current locale. Returns 1 if affirmative, 0 if |
827 | negative, and -1 if not matching. */ |
828 | extern int rpmatch (const char *__response) __THROW __nonnull ((1)) __wur; |
829 | #endif |
830 | |
831 | |
832 | #if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8 |
833 | /* Parse comma separated suboption from *OPTIONP and match against |
834 | strings in TOKENS. If found return index and set *VALUEP to |
835 | optional value introduced by an equal sign. If the suboption is |
836 | not part of TOKENS return in *VALUEP beginning of unknown |
837 | suboption. On exit *OPTIONP is set to the beginning of the next |
838 | token or at the terminating NUL character. */ |
839 | extern int getsubopt (char **__restrict __optionp, |
840 | char *const *__restrict __tokens, |
841 | char **__restrict __valuep) |
842 | __THROW __nonnull ((1, 2, 3)) __wur; |
843 | #endif |
844 | |
845 | |
846 | #ifdef __USE_XOPEN |
847 | /* Setup DES tables according KEY. */ |
848 | extern void setkey (const char *__key) __THROW __nonnull ((1)); |
849 | #endif |
850 | |
851 | |
852 | /* X/Open pseudo terminal handling. */ |
853 | |
854 | #ifdef __USE_XOPEN2KXSI |
855 | /* Return a master pseudo-terminal handle. */ |
856 | extern int posix_openpt (int __oflag) __wur; |
857 | #endif |
858 | |
859 | #ifdef __USE_XOPEN_EXTENDED |
860 | /* The next four functions all take a master pseudo-tty fd and |
861 | perform an operation on the associated slave: */ |
862 | |
863 | /* Chown the slave to the calling user. */ |
864 | extern int grantpt (int __fd) __THROW; |
865 | |
866 | /* Release an internal lock so the slave can be opened. |
867 | Call after grantpt(). */ |
868 | extern int unlockpt (int __fd) __THROW; |
869 | |
870 | /* Return the pathname of the pseudo terminal slave associated with |
871 | the master FD is open on, or NULL on errors. |
872 | The returned storage is good until the next call to this function. */ |
873 | extern char *ptsname (int __fd) __THROW __wur; |
874 | #endif |
875 | |
876 | #ifdef __USE_GNU |
877 | /* Store at most BUFLEN characters of the pathname of the slave pseudo |
878 | terminal associated with the master FD is open on in BUF. |
879 | Return 0 on success, otherwise an error number. */ |
880 | extern int ptsname_r (int __fd, char *__buf, size_t __buflen) |
881 | __THROW __nonnull ((2)); |
882 | |
883 | /* Open a master pseudo terminal and return its file descriptor. */ |
884 | extern int getpt (void); |
885 | #endif |
886 | |
887 | #ifdef __USE_MISC |
888 | /* Put the 1 minute, 5 minute and 15 minute load averages into the first |
889 | NELEM elements of LOADAVG. Return the number written (never more than |
890 | three, but may be less than NELEM), or -1 if an error occurred. */ |
891 | extern int getloadavg (double __loadavg[], int __nelem) |
892 | __THROW __nonnull ((1)); |
893 | #endif |
894 | |
895 | #if defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K |
896 | /* Return the index into the active-logins file (utmp) for |
897 | the controlling terminal. */ |
898 | extern int ttyslot (void) __THROW; |
899 | #endif |
900 | |
901 | #include <bits/stdlib-float.h> |
902 | |
903 | /* Define some macros helping to catch buffer overflows. */ |
904 | #if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function |
905 | # include <bits/stdlib.h> |
906 | #endif |
907 | #ifdef __LDBL_COMPAT |
908 | # include <bits/stdlib-ldbl.h> |
909 | #endif |
910 | |
911 | __END_DECLS |
912 | |
913 | #endif /* stdlib.h */ |
914 | |