1 /* Copyright (C) 1991-2021 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 <https://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 __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION
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 /* Likewise for '_FloatN' and '_FloatNx'. */
132
133 #if __HAVE_FLOAT16 && __GLIBC_USE (IEC_60559_TYPES_EXT)
134 extern _Float16 strtof16 (const char *__restrict __nptr,
135 char **__restrict __endptr)
136 __THROW __nonnull ((1));
137 #endif
138
139 #if __HAVE_FLOAT32 && __GLIBC_USE (IEC_60559_TYPES_EXT)
140 extern _Float32 strtof32 (const char *__restrict __nptr,
141 char **__restrict __endptr)
142 __THROW __nonnull ((1));
143 #endif
144
145 #if __HAVE_FLOAT64 && __GLIBC_USE (IEC_60559_TYPES_EXT)
146 extern _Float64 strtof64 (const char *__restrict __nptr,
147 char **__restrict __endptr)
148 __THROW __nonnull ((1));
149 #endif
150
151 #if __HAVE_FLOAT128 && __GLIBC_USE (IEC_60559_TYPES_EXT)
152 extern _Float128 strtof128 (const char *__restrict __nptr,
153 char **__restrict __endptr)
154 __THROW __nonnull ((1));
155 #endif
156
157 #if __HAVE_FLOAT32X && __GLIBC_USE (IEC_60559_TYPES_EXT)
158 extern _Float32x strtof32x (const char *__restrict __nptr,
159 char **__restrict __endptr)
160 __THROW __nonnull ((1));
161 #endif
162
163 #if __HAVE_FLOAT64X && __GLIBC_USE (IEC_60559_TYPES_EXT)
164 extern _Float64x strtof64x (const char *__restrict __nptr,
165 char **__restrict __endptr)
166 __THROW __nonnull ((1));
167 #endif
168
169 #if __HAVE_FLOAT128X && __GLIBC_USE (IEC_60559_TYPES_EXT)
170 extern _Float128x strtof128x (const char *__restrict __nptr,
171 char **__restrict __endptr)
172 __THROW __nonnull ((1));
173 #endif
174
175 /* Convert a string to a long integer. */
176 extern long int strtol (const char *__restrict __nptr,
177 char **__restrict __endptr, int __base)
178 __THROW __nonnull ((1));
179 /* Convert a string to an unsigned long integer. */
180 extern unsigned long int strtoul (const char *__restrict __nptr,
181 char **__restrict __endptr, int __base)
182 __THROW __nonnull ((1));
183
184 #ifdef __USE_MISC
185 /* Convert a string to a quadword integer. */
186 __extension__
187 extern long long int strtoq (const char *__restrict __nptr,
188 char **__restrict __endptr, int __base)
189 __THROW __nonnull ((1));
190 /* Convert a string to an unsigned quadword integer. */
191 __extension__
192 extern unsigned long long int strtouq (const char *__restrict __nptr,
193 char **__restrict __endptr, int __base)
194 __THROW __nonnull ((1));
195 #endif /* Use misc. */
196
197 #ifdef __USE_ISOC99
198 /* Convert a string to a quadword integer. */
199 __extension__
200 extern long long int strtoll (const char *__restrict __nptr,
201 char **__restrict __endptr, int __base)
202 __THROW __nonnull ((1));
203 /* Convert a string to an unsigned quadword integer. */
204 __extension__
205 extern unsigned long long int strtoull (const char *__restrict __nptr,
206 char **__restrict __endptr, int __base)
207 __THROW __nonnull ((1));
208 #endif /* ISO C99 or use MISC. */
209
210 /* Convert a floating-point number to a string. */
211 #if __GLIBC_USE (IEC_60559_BFP_EXT_C2X)
212 extern int strfromd (char *__dest, size_t __size, const char *__format,
213 double __f)
214 __THROW __nonnull ((3));
215
216 extern int strfromf (char *__dest, size_t __size, const char *__format,
217 float __f)
218 __THROW __nonnull ((3));
219
220 extern int strfroml (char *__dest, size_t __size, const char *__format,
221 long double __f)
222 __THROW __nonnull ((3));
223 #endif
224
225 #if __HAVE_FLOAT16 && __GLIBC_USE (IEC_60559_TYPES_EXT)
226 extern int strfromf16 (char *__dest, size_t __size, const char * __format,
227 _Float16 __f)
228 __THROW __nonnull ((3));
229 #endif
230
231 #if __HAVE_FLOAT32 && __GLIBC_USE (IEC_60559_TYPES_EXT)
232 extern int strfromf32 (char *__dest, size_t __size, const char * __format,
233 _Float32 __f)
234 __THROW __nonnull ((3));
235 #endif
236
237 #if __HAVE_FLOAT64 && __GLIBC_USE (IEC_60559_TYPES_EXT)
238 extern int strfromf64 (char *__dest, size_t __size, const char * __format,
239 _Float64 __f)
240 __THROW __nonnull ((3));
241 #endif
242
243 #if __HAVE_FLOAT128 && __GLIBC_USE (IEC_60559_TYPES_EXT)
244 extern int strfromf128 (char *__dest, size_t __size, const char * __format,
245 _Float128 __f)
246 __THROW __nonnull ((3));
247 #endif
248
249 #if __HAVE_FLOAT32X && __GLIBC_USE (IEC_60559_TYPES_EXT)
250 extern int strfromf32x (char *__dest, size_t __size, const char * __format,
251 _Float32x __f)
252 __THROW __nonnull ((3));
253 #endif
254
255 #if __HAVE_FLOAT64X && __GLIBC_USE (IEC_60559_TYPES_EXT)
256 extern int strfromf64x (char *__dest, size_t __size, const char * __format,
257 _Float64x __f)
258 __THROW __nonnull ((3));
259 #endif
260
261 #if __HAVE_FLOAT128X && __GLIBC_USE (IEC_60559_TYPES_EXT)
262 extern int strfromf128x (char *__dest, size_t __size, const char * __format,
263 _Float128x __f)
264 __THROW __nonnull ((3));
265 #endif
266
267
268 #ifdef __USE_GNU
269 /* Parallel versions of the functions above which take the locale to
270 use as an additional parameter. These are GNU extensions inspired
271 by the POSIX.1-2008 extended locale API. */
272 # include <bits/types/locale_t.h>
273
274 extern long int strtol_l (const char *__restrict __nptr,
275 char **__restrict __endptr, int __base,
276 locale_t __loc) __THROW __nonnull ((1, 4));
277
278 extern unsigned long int strtoul_l (const char *__restrict __nptr,
279 char **__restrict __endptr,
280 int __base, locale_t __loc)
281 __THROW __nonnull ((1, 4));
282
283 __extension__
284 extern long long int strtoll_l (const char *__restrict __nptr,
285 char **__restrict __endptr, int __base,
286 locale_t __loc)
287 __THROW __nonnull ((1, 4));
288
289 __extension__
290 extern unsigned long long int strtoull_l (const char *__restrict __nptr,
291 char **__restrict __endptr,
292 int __base, locale_t __loc)
293 __THROW __nonnull ((1, 4));
294
295 extern double strtod_l (const char *__restrict __nptr,
296 char **__restrict __endptr, locale_t __loc)
297 __THROW __nonnull ((1, 3));
298
299 extern float strtof_l (const char *__restrict __nptr,
300 char **__restrict __endptr, locale_t __loc)
301 __THROW __nonnull ((1, 3));
302
303 extern long double strtold_l (const char *__restrict __nptr,
304 char **__restrict __endptr,
305 locale_t __loc)
306 __THROW __nonnull ((1, 3));
307
308 # if __HAVE_FLOAT16
309 extern _Float16 strtof16_l (const char *__restrict __nptr,
310 char **__restrict __endptr,
311 locale_t __loc)
312 __THROW __nonnull ((1, 3));
313 # endif
314
315 # if __HAVE_FLOAT32
316 extern _Float32 strtof32_l (const char *__restrict __nptr,
317 char **__restrict __endptr,
318 locale_t __loc)
319 __THROW __nonnull ((1, 3));
320 # endif
321
322 # if __HAVE_FLOAT64
323 extern _Float64 strtof64_l (const char *__restrict __nptr,
324 char **__restrict __endptr,
325 locale_t __loc)
326 __THROW __nonnull ((1, 3));
327 # endif
328
329 # if __HAVE_FLOAT128
330 extern _Float128 strtof128_l (const char *__restrict __nptr,
331 char **__restrict __endptr,
332 locale_t __loc)
333 __THROW __nonnull ((1, 3));
334 # endif
335
336 # if __HAVE_FLOAT32X
337 extern _Float32x strtof32x_l (const char *__restrict __nptr,
338 char **__restrict __endptr,
339 locale_t __loc)
340 __THROW __nonnull ((1, 3));
341 # endif
342
343 # if __HAVE_FLOAT64X
344 extern _Float64x strtof64x_l (const char *__restrict __nptr,
345 char **__restrict __endptr,
346 locale_t __loc)
347 __THROW __nonnull ((1, 3));
348 # endif
349
350 # if __HAVE_FLOAT128X
351 extern _Float128x strtof128x_l (const char *__restrict __nptr,
352 char **__restrict __endptr,
353 locale_t __loc)
354 __THROW __nonnull ((1, 3));
355 # endif
356 #endif /* GNU */
357
358
359 #ifdef __USE_EXTERN_INLINES
360 __extern_inline int
__NTH(atoi (const char * __nptr))361 __NTH (atoi (const char *__nptr))
362 {
363 return (int) strtol (__nptr, (char **) NULL, 10);
364 }
365 __extern_inline long int
__NTH(atol (const char * __nptr))366 __NTH (atol (const char *__nptr))
367 {
368 return strtol (__nptr, (char **) NULL, 10);
369 }
370
371 # ifdef __USE_ISOC99
372 __extension__ __extern_inline long long int
__NTH(atoll (const char * __nptr))373 __NTH (atoll (const char *__nptr))
374 {
375 return strtoll (__nptr, (char **) NULL, 10);
376 }
377 # endif
378 #endif /* Optimizing and Inlining. */
379
380
381 #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
382 /* Convert N to base 64 using the digits "./0-9A-Za-z", least-significant
383 digit first. Returns a pointer to static storage overwritten by the
384 next call. */
385 extern char *l64a (long int __n) __THROW __wur;
386
387 /* Read a number from a string S in base 64 as above. */
388 extern long int a64l (const char *__s)
389 __THROW __attribute_pure__ __nonnull ((1)) __wur;
390
391 #endif /* Use misc || extended X/Open. */
392
393 #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
394 # include <sys/types.h> /* we need int32_t... */
395
396 /* These are the functions that actually do things. The `random', `srandom',
397 `initstate' and `setstate' functions are those from BSD Unices.
398 The `rand' and `srand' functions are required by the ANSI standard.
399 We provide both interfaces to the same random number generator. */
400 /* Return a random long integer between 0 and 2^31-1 inclusive. */
401 extern long int random (void) __THROW;
402
403 /* Seed the random number generator with the given number. */
404 extern void srandom (unsigned int __seed) __THROW;
405
406 /* Initialize the random number generator to use state buffer STATEBUF,
407 of length STATELEN, and seed it with SEED. Optimal lengths are 8, 16,
408 32, 64, 128 and 256, the bigger the better; values less than 8 will
409 cause an error and values greater than 256 will be rounded down. */
410 extern char *initstate (unsigned int __seed, char *__statebuf,
411 size_t __statelen) __THROW __nonnull ((2));
412
413 /* Switch the random number generator to state buffer STATEBUF,
414 which should have been previously initialized by `initstate'. */
415 extern char *setstate (char *__statebuf) __THROW __nonnull ((1));
416
417
418 # ifdef __USE_MISC
419 /* Reentrant versions of the `random' family of functions.
420 These functions all use the following data structure to contain
421 state, rather than global state variables. */
422
423 struct random_data
424 {
425 int32_t *fptr; /* Front pointer. */
426 int32_t *rptr; /* Rear pointer. */
427 int32_t *state; /* Array of state values. */
428 int rand_type; /* Type of random number generator. */
429 int rand_deg; /* Degree of random number generator. */
430 int rand_sep; /* Distance between front and rear. */
431 int32_t *end_ptr; /* Pointer behind state table. */
432 };
433
434 extern int random_r (struct random_data *__restrict __buf,
435 int32_t *__restrict __result) __THROW __nonnull ((1, 2));
436
437 extern int srandom_r (unsigned int __seed, struct random_data *__buf)
438 __THROW __nonnull ((2));
439
440 extern int initstate_r (unsigned int __seed, char *__restrict __statebuf,
441 size_t __statelen,
442 struct random_data *__restrict __buf)
443 __THROW __nonnull ((2, 4));
444
445 extern int setstate_r (char *__restrict __statebuf,
446 struct random_data *__restrict __buf)
447 __THROW __nonnull ((1, 2));
448 # endif /* Use misc. */
449 #endif /* Use extended X/Open || misc. */
450
451
452 /* Return a random integer between 0 and RAND_MAX inclusive. */
453 extern int rand (void) __THROW;
454 /* Seed the random number generator with the given number. */
455 extern void srand (unsigned int __seed) __THROW;
456
457 #ifdef __USE_POSIX199506
458 /* Reentrant interface according to POSIX.1. */
459 extern int rand_r (unsigned int *__seed) __THROW;
460 #endif
461
462
463 #if defined __USE_MISC || defined __USE_XOPEN
464 /* System V style 48-bit random number generator functions. */
465
466 /* Return non-negative, double-precision floating-point value in [0.0,1.0). */
467 extern double drand48 (void) __THROW;
468 extern double erand48 (unsigned short int __xsubi[3]) __THROW __nonnull ((1));
469
470 /* Return non-negative, long integer in [0,2^31). */
471 extern long int lrand48 (void) __THROW;
472 extern long int nrand48 (unsigned short int __xsubi[3])
473 __THROW __nonnull ((1));
474
475 /* Return signed, long integers in [-2^31,2^31). */
476 extern long int mrand48 (void) __THROW;
477 extern long int jrand48 (unsigned short int __xsubi[3])
478 __THROW __nonnull ((1));
479
480 /* Seed random number generator. */
481 extern void srand48 (long int __seedval) __THROW;
482 extern unsigned short int *seed48 (unsigned short int __seed16v[3])
483 __THROW __nonnull ((1));
484 extern void lcong48 (unsigned short int __param[7]) __THROW __nonnull ((1));
485
486 # ifdef __USE_MISC
487 /* Data structure for communication with thread safe versions. This
488 type is to be regarded as opaque. It's only exported because users
489 have to allocate objects of this type. */
490 struct drand48_data
491 {
492 unsigned short int __x[3]; /* Current state. */
493 unsigned short int __old_x[3]; /* Old state. */
494 unsigned short int __c; /* Additive const. in congruential formula. */
495 unsigned short int __init; /* Flag for initializing. */
496 __extension__ unsigned long long int __a; /* Factor in congruential
497 formula. */
498 };
499
500 /* Return non-negative, double-precision floating-point value in [0.0,1.0). */
501 extern int drand48_r (struct drand48_data *__restrict __buffer,
502 double *__restrict __result) __THROW __nonnull ((1, 2));
503 extern int erand48_r (unsigned short int __xsubi[3],
504 struct drand48_data *__restrict __buffer,
505 double *__restrict __result) __THROW __nonnull ((1, 2));
506
507 /* Return non-negative, long integer in [0,2^31). */
508 extern int lrand48_r (struct drand48_data *__restrict __buffer,
509 long int *__restrict __result)
510 __THROW __nonnull ((1, 2));
511 extern int nrand48_r (unsigned short int __xsubi[3],
512 struct drand48_data *__restrict __buffer,
513 long int *__restrict __result)
514 __THROW __nonnull ((1, 2));
515
516 /* Return signed, long integers in [-2^31,2^31). */
517 extern int mrand48_r (struct drand48_data *__restrict __buffer,
518 long int *__restrict __result)
519 __THROW __nonnull ((1, 2));
520 extern int jrand48_r (unsigned short int __xsubi[3],
521 struct drand48_data *__restrict __buffer,
522 long int *__restrict __result)
523 __THROW __nonnull ((1, 2));
524
525 /* Seed random number generator. */
526 extern int srand48_r (long int __seedval, struct drand48_data *__buffer)
527 __THROW __nonnull ((2));
528
529 extern int seed48_r (unsigned short int __seed16v[3],
530 struct drand48_data *__buffer) __THROW __nonnull ((1, 2));
531
532 extern int lcong48_r (unsigned short int __param[7],
533 struct drand48_data *__buffer)
534 __THROW __nonnull ((1, 2));
535 # endif /* Use misc. */
536 #endif /* Use misc or X/Open. */
537
538 /* Allocate SIZE bytes of memory. */
539 extern void *malloc (size_t __size) __THROW __attribute_malloc__
540 __attribute_alloc_size__ ((1)) __wur;
541 /* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */
542 extern void *calloc (size_t __nmemb, size_t __size)
543 __THROW __attribute_malloc__ __attribute_alloc_size__ ((1, 2)) __wur;
544
545 /* Re-allocate the previously allocated block
546 in PTR, making the new block SIZE bytes long. */
547 /* __attribute_malloc__ is not used, because if realloc returns
548 the same pointer that was passed to it, aliasing needs to be allowed
549 between objects pointed by the old and new pointers. */
550 extern void *realloc (void *__ptr, size_t __size)
551 __THROW __attribute_warn_unused_result__ __attribute_alloc_size__ ((2));
552
553 /* Free a block allocated by `malloc', `realloc' or `calloc'. */
554 extern void free (void *__ptr) __THROW;
555
556 #ifdef __USE_MISC
557 /* Re-allocate the previously allocated block in PTR, making the new
558 block large enough for NMEMB elements of SIZE bytes each. */
559 /* __attribute_malloc__ is not used, because if reallocarray returns
560 the same pointer that was passed to it, aliasing needs to be allowed
561 between objects pointed by the old and new pointers. */
562 extern void *reallocarray (void *__ptr, size_t __nmemb, size_t __size)
563 __THROW __attribute_warn_unused_result__
564 __attribute_alloc_size__ ((2, 3))
565 __attr_dealloc_free;
566
567 /* Add reallocarray as its own deallocator. */
568 extern void *reallocarray (void *__ptr, size_t __nmemb, size_t __size)
569 __THROW __attr_dealloc (reallocarray, 1);
570 #endif
571
572 #ifdef __USE_MISC
573 # include <alloca.h>
574 #endif /* Use misc. */
575
576 #if (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K) \
577 || defined __USE_MISC
578 /* Allocate SIZE bytes on a page boundary. The storage cannot be freed. */
579 extern void *valloc (size_t __size) __THROW __attribute_malloc__
580 __attribute_alloc_size__ ((1)) __wur;
581 #endif
582
583 #ifdef __USE_XOPEN2K
584 /* Allocate memory of SIZE bytes with an alignment of ALIGNMENT. */
585 extern int posix_memalign (void **__memptr, size_t __alignment, size_t __size)
586 __THROW __nonnull ((1)) __wur;
587 #endif
588
589 #ifdef __USE_ISOC11
590 /* ISO C variant of aligned allocation. */
591 extern void *aligned_alloc (size_t __alignment, size_t __size)
592 __THROW __attribute_malloc__ __attribute_alloc_size__ ((2)) __wur;
593 #endif
594
595 /* Abort execution and generate a core-dump. */
596 extern void abort (void) __THROW __attribute__ ((__noreturn__));
597
598
599 /* Register a function to be called when `exit' is called. */
600 extern int atexit (void (*__func) (void)) __THROW __nonnull ((1));
601
602 #if defined __USE_ISOC11 || defined __USE_ISOCXX11
603 /* Register a function to be called when `quick_exit' is called. */
604 # ifdef __cplusplus
605 extern "C++" int at_quick_exit (void (*__func) (void))
606 __THROW __asm ("at_quick_exit") __nonnull ((1));
607 # else
608 extern int at_quick_exit (void (*__func) (void)) __THROW __nonnull ((1));
609 # endif
610 #endif
611
612 #ifdef __USE_MISC
613 /* Register a function to be called with the status
614 given to `exit' and the given argument. */
615 extern int on_exit (void (*__func) (int __status, void *__arg), void *__arg)
616 __THROW __nonnull ((1));
617 #endif
618
619 /* Call all functions registered with `atexit' and `on_exit',
620 in the reverse of the order in which they were registered,
621 perform stdio cleanup, and terminate program execution with STATUS. */
622 extern void exit (int __status) __THROW __attribute__ ((__noreturn__));
623
624 #if defined __USE_ISOC11 || defined __USE_ISOCXX11
625 /* Call all functions registered with `at_quick_exit' in the reverse
626 of the order in which they were registered and terminate program
627 execution with STATUS. */
628 extern void quick_exit (int __status) __THROW __attribute__ ((__noreturn__));
629 #endif
630
631 #ifdef __USE_ISOC99
632 /* Terminate the program with STATUS without calling any of the
633 functions registered with `atexit' or `on_exit'. */
634 extern void _Exit (int __status) __THROW __attribute__ ((__noreturn__));
635 #endif
636
637
638 /* Return the value of envariable NAME, or NULL if it doesn't exist. */
639 extern char *getenv (const char *__name) __THROW __nonnull ((1)) __wur;
640
641 #ifdef __USE_GNU
642 /* This function is similar to the above but returns NULL if the
643 programs is running with SUID or SGID enabled. */
644 extern char *secure_getenv (const char *__name)
645 __THROW __nonnull ((1)) __wur;
646 #endif
647
648 #if defined __USE_MISC || defined __USE_XOPEN
649 /* The SVID says this is in <stdio.h>, but this seems a better place. */
650 /* Put STRING, which is of the form "NAME=VALUE", in the environment.
651 If there is no `=', remove NAME from the environment. */
652 extern int putenv (char *__string) __THROW __nonnull ((1));
653 #endif
654
655 #ifdef __USE_XOPEN2K
656 /* Set NAME to VALUE in the environment.
657 If REPLACE is nonzero, overwrite an existing value. */
658 extern int setenv (const char *__name, const char *__value, int __replace)
659 __THROW __nonnull ((2));
660
661 /* Remove the variable NAME from the environment. */
662 extern int unsetenv (const char *__name) __THROW __nonnull ((1));
663 #endif
664
665 #ifdef __USE_MISC
666 /* The `clearenv' was planned to be added to POSIX.1 but probably
667 never made it. Nevertheless the POSIX.9 standard (POSIX bindings
668 for Fortran 77) requires this function. */
669 extern int clearenv (void) __THROW;
670 #endif
671
672
673 #if defined __USE_MISC \
674 || (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K8)
675 /* Generate a unique temporary file name from TEMPLATE.
676 The last six characters of TEMPLATE must be "XXXXXX";
677 they are replaced with a string that makes the file name unique.
678 Always returns TEMPLATE, it's either a temporary file name or a null
679 string if it cannot get a unique file name. */
680 extern char *mktemp (char *__template) __THROW __nonnull ((1));
681 #endif
682
683 #if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
684 /* Generate a unique temporary file name from TEMPLATE.
685 The last six characters of TEMPLATE must be "XXXXXX";
686 they are replaced with a string that makes the filename unique.
687 Returns a file descriptor open on the file for reading and writing,
688 or -1 if it cannot create a uniquely-named file.
689
690 This function is a possible cancellation point and therefore not
691 marked with __THROW. */
692 # ifndef __USE_FILE_OFFSET64
693 extern int mkstemp (char *__template) __nonnull ((1)) __wur;
694 # else
695 # ifdef __REDIRECT
696 extern int __REDIRECT (mkstemp, (char *__template), mkstemp64)
697 __nonnull ((1)) __wur;
698 # else
699 # define mkstemp mkstemp64
700 # endif
701 # endif
702 # ifdef __USE_LARGEFILE64
703 extern int mkstemp64 (char *__template) __nonnull ((1)) __wur;
704 # endif
705 #endif
706
707 #ifdef __USE_MISC
708 /* Similar to mkstemp, but the template can have a suffix after the
709 XXXXXX. The length of the suffix is specified in the second
710 parameter.
711
712 This function is a possible cancellation point and therefore not
713 marked with __THROW. */
714 # ifndef __USE_FILE_OFFSET64
715 extern int mkstemps (char *__template, int __suffixlen) __nonnull ((1)) __wur;
716 # else
717 # ifdef __REDIRECT
718 extern int __REDIRECT (mkstemps, (char *__template, int __suffixlen),
719 mkstemps64) __nonnull ((1)) __wur;
720 # else
721 # define mkstemps mkstemps64
722 # endif
723 # endif
724 # ifdef __USE_LARGEFILE64
725 extern int mkstemps64 (char *__template, int __suffixlen)
726 __nonnull ((1)) __wur;
727 # endif
728 #endif
729
730 #ifdef __USE_XOPEN2K8
731 /* Create a unique temporary directory from TEMPLATE.
732 The last six characters of TEMPLATE must be "XXXXXX";
733 they are replaced with a string that makes the directory name unique.
734 Returns TEMPLATE, or a null pointer if it cannot get a unique name.
735 The directory is created mode 700. */
736 extern char *mkdtemp (char *__template) __THROW __nonnull ((1)) __wur;
737 #endif
738
739 #ifdef __USE_GNU
740 /* Generate a unique temporary file name from TEMPLATE similar to
741 mkstemp. But allow the caller to pass additional flags which are
742 used in the open call to create the file..
743
744 This function is a possible cancellation point and therefore not
745 marked with __THROW. */
746 # ifndef __USE_FILE_OFFSET64
747 extern int mkostemp (char *__template, int __flags) __nonnull ((1)) __wur;
748 # else
749 # ifdef __REDIRECT
750 extern int __REDIRECT (mkostemp, (char *__template, int __flags), mkostemp64)
751 __nonnull ((1)) __wur;
752 # else
753 # define mkostemp mkostemp64
754 # endif
755 # endif
756 # ifdef __USE_LARGEFILE64
757 extern int mkostemp64 (char *__template, int __flags) __nonnull ((1)) __wur;
758 # endif
759
760 /* Similar to mkostemp, but the template can have a suffix after the
761 XXXXXX. The length of the suffix is specified in the second
762 parameter.
763
764 This function is a possible cancellation point and therefore not
765 marked with __THROW. */
766 # ifndef __USE_FILE_OFFSET64
767 extern int mkostemps (char *__template, int __suffixlen, int __flags)
768 __nonnull ((1)) __wur;
769 # else
770 # ifdef __REDIRECT
771 extern int __REDIRECT (mkostemps, (char *__template, int __suffixlen,
772 int __flags), mkostemps64)
773 __nonnull ((1)) __wur;
774 # else
775 # define mkostemps mkostemps64
776 # endif
777 # endif
778 # ifdef __USE_LARGEFILE64
779 extern int mkostemps64 (char *__template, int __suffixlen, int __flags)
780 __nonnull ((1)) __wur;
781 # endif
782 #endif
783
784
785 /* Execute the given line as a shell command.
786
787 This function is a cancellation point and therefore not marked with
788 __THROW. */
789 extern int system (const char *__command) __wur;
790
791
792 #ifdef __USE_GNU
793 /* Return a malloc'd string containing the canonical absolute name of the
794 existing named file. */
795 extern char *canonicalize_file_name (const char *__name)
796 __THROW __nonnull ((1)) __attribute_malloc__
797 __attr_dealloc_free __wur;
798 #endif
799
800 #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
801 /* Return the canonical absolute name of file NAME. If RESOLVED is
802 null, the result is malloc'd; otherwise, if the canonical name is
803 PATH_MAX chars or more, returns null with `errno' set to
804 ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars,
805 returns the name in RESOLVED. */
806 extern char *realpath (const char *__restrict __name,
807 char *__restrict __resolved) __THROW __wur;
808 #endif
809
810
811 /* Shorthand for type of comparison functions. */
812 #ifndef __COMPAR_FN_T
813 # define __COMPAR_FN_T
814 typedef int (*__compar_fn_t) (const void *, const void *);
815
816 # ifdef __USE_GNU
817 typedef __compar_fn_t comparison_fn_t;
818 # endif
819 #endif
820 #ifdef __USE_GNU
821 typedef int (*__compar_d_fn_t) (const void *, const void *, void *);
822 #endif
823
824 /* Do a binary search for KEY in BASE, which consists of NMEMB elements
825 of SIZE bytes each, using COMPAR to perform the comparisons. */
826 extern void *bsearch (const void *__key, const void *__base,
827 size_t __nmemb, size_t __size, __compar_fn_t __compar)
828 __nonnull ((1, 2, 5)) __wur;
829
830 #ifdef __USE_EXTERN_INLINES
831 # include <bits/stdlib-bsearch.h>
832 #endif
833
834 /* Sort NMEMB elements of BASE, of SIZE bytes each,
835 using COMPAR to perform the comparisons. */
836 extern void qsort (void *__base, size_t __nmemb, size_t __size,
837 __compar_fn_t __compar) __nonnull ((1, 4));
838 #ifdef __USE_GNU
839 extern void qsort_r (void *__base, size_t __nmemb, size_t __size,
840 __compar_d_fn_t __compar, void *__arg)
841 __nonnull ((1, 4));
842 #endif
843
844
845 /* Return the absolute value of X. */
846 extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur;
847 extern long int labs (long int __x) __THROW __attribute__ ((__const__)) __wur;
848
849 #ifdef __USE_ISOC99
850 __extension__ extern long long int llabs (long long int __x)
851 __THROW __attribute__ ((__const__)) __wur;
852 #endif
853
854
855 /* Return the `div_t', `ldiv_t' or `lldiv_t' representation
856 of the value of NUMER over DENOM. */
857 /* GCC may have built-ins for these someday. */
858 extern div_t div (int __numer, int __denom)
859 __THROW __attribute__ ((__const__)) __wur;
860 extern ldiv_t ldiv (long int __numer, long int __denom)
861 __THROW __attribute__ ((__const__)) __wur;
862
863 #ifdef __USE_ISOC99
864 __extension__ extern lldiv_t lldiv (long long int __numer,
865 long long int __denom)
866 __THROW __attribute__ ((__const__)) __wur;
867 #endif
868
869
870 #if (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K8) \
871 || defined __USE_MISC
872 /* Convert floating point numbers to strings. The returned values are
873 valid only until another call to the same function. */
874
875 /* Convert VALUE to a string with NDIGIT digits and return a pointer to
876 this. Set *DECPT with the position of the decimal character and *SIGN
877 with the sign of the number. */
878 extern char *ecvt (double __value, int __ndigit, int *__restrict __decpt,
879 int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur;
880
881 /* Convert VALUE to a string rounded to NDIGIT decimal digits. Set *DECPT
882 with the position of the decimal character and *SIGN with the sign of
883 the number. */
884 extern char *fcvt (double __value, int __ndigit, int *__restrict __decpt,
885 int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur;
886
887 /* If possible convert VALUE to a string with NDIGIT significant digits.
888 Otherwise use exponential representation. The resulting string will
889 be written to BUF. */
890 extern char *gcvt (double __value, int __ndigit, char *__buf)
891 __THROW __nonnull ((3)) __wur;
892 #endif
893
894 #ifdef __USE_MISC
895 /* Long double versions of above functions. */
896 extern char *qecvt (long double __value, int __ndigit,
897 int *__restrict __decpt, int *__restrict __sign)
898 __THROW __nonnull ((3, 4)) __wur;
899 extern char *qfcvt (long double __value, int __ndigit,
900 int *__restrict __decpt, int *__restrict __sign)
901 __THROW __nonnull ((3, 4)) __wur;
902 extern char *qgcvt (long double __value, int __ndigit, char *__buf)
903 __THROW __nonnull ((3)) __wur;
904
905
906 /* Reentrant version of the functions above which provide their own
907 buffers. */
908 extern int ecvt_r (double __value, int __ndigit, int *__restrict __decpt,
909 int *__restrict __sign, char *__restrict __buf,
910 size_t __len) __THROW __nonnull ((3, 4, 5));
911 extern int fcvt_r (double __value, int __ndigit, int *__restrict __decpt,
912 int *__restrict __sign, char *__restrict __buf,
913 size_t __len) __THROW __nonnull ((3, 4, 5));
914
915 extern int qecvt_r (long double __value, int __ndigit,
916 int *__restrict __decpt, int *__restrict __sign,
917 char *__restrict __buf, size_t __len)
918 __THROW __nonnull ((3, 4, 5));
919 extern int qfcvt_r (long double __value, int __ndigit,
920 int *__restrict __decpt, int *__restrict __sign,
921 char *__restrict __buf, size_t __len)
922 __THROW __nonnull ((3, 4, 5));
923 #endif /* misc */
924
925
926 /* Return the length of the multibyte character
927 in S, which is no longer than N. */
928 extern int mblen (const char *__s, size_t __n) __THROW;
929 /* Return the length of the given multibyte character,
930 putting its `wchar_t' representation in *PWC. */
931 extern int mbtowc (wchar_t *__restrict __pwc,
932 const char *__restrict __s, size_t __n) __THROW;
933 /* Put the multibyte character represented
934 by WCHAR in S, returning its length. */
935 extern int wctomb (char *__s, wchar_t __wchar) __THROW;
936
937
938 /* Convert a multibyte string to a wide char string. */
939 extern size_t mbstowcs (wchar_t *__restrict __pwcs,
940 const char *__restrict __s, size_t __n) __THROW
941 __attr_access ((__read_only__, 2));
942 /* Convert a wide char string to multibyte string. */
943 extern size_t wcstombs (char *__restrict __s,
944 const wchar_t *__restrict __pwcs, size_t __n)
945 __THROW
946 __attr_access ((__write_only__, 1, 3)) __attr_access ((__read_only__, 2));
947
948 #ifdef __USE_MISC
949 /* Determine whether the string value of RESPONSE matches the affirmation
950 or negative response expression as specified by the LC_MESSAGES category
951 in the program's current locale. Returns 1 if affirmative, 0 if
952 negative, and -1 if not matching. */
953 extern int rpmatch (const char *__response) __THROW __nonnull ((1)) __wur;
954 #endif
955
956
957 #if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
958 /* Parse comma separated suboption from *OPTIONP and match against
959 strings in TOKENS. If found return index and set *VALUEP to
960 optional value introduced by an equal sign. If the suboption is
961 not part of TOKENS return in *VALUEP beginning of unknown
962 suboption. On exit *OPTIONP is set to the beginning of the next
963 token or at the terminating NUL character. */
964 extern int getsubopt (char **__restrict __optionp,
965 char *const *__restrict __tokens,
966 char **__restrict __valuep)
967 __THROW __nonnull ((1, 2, 3)) __wur;
968 #endif
969
970
971 /* X/Open pseudo terminal handling. */
972
973 #ifdef __USE_XOPEN2KXSI
974 /* Return a master pseudo-terminal handle. */
975 extern int posix_openpt (int __oflag) __wur;
976 #endif
977
978 #ifdef __USE_XOPEN_EXTENDED
979 /* The next four functions all take a master pseudo-tty fd and
980 perform an operation on the associated slave: */
981
982 /* Chown the slave to the calling user. */
983 extern int grantpt (int __fd) __THROW;
984
985 /* Release an internal lock so the slave can be opened.
986 Call after grantpt(). */
987 extern int unlockpt (int __fd) __THROW;
988
989 /* Return the pathname of the pseudo terminal slave associated with
990 the master FD is open on, or NULL on errors.
991 The returned storage is good until the next call to this function. */
992 extern char *ptsname (int __fd) __THROW __wur;
993 #endif
994
995 #ifdef __USE_GNU
996 /* Store at most BUFLEN characters of the pathname of the slave pseudo
997 terminal associated with the master FD is open on in BUF.
998 Return 0 on success, otherwise an error number. */
999 extern int ptsname_r (int __fd, char *__buf, size_t __buflen)
1000 __THROW __nonnull ((2)) __attr_access ((__write_only__, 2, 3));
1001
1002 /* Open a master pseudo terminal and return its file descriptor. */
1003 extern int getpt (void);
1004 #endif
1005
1006 #ifdef __USE_MISC
1007 /* Put the 1 minute, 5 minute and 15 minute load averages into the first
1008 NELEM elements of LOADAVG. Return the number written (never more than
1009 three, but may be less than NELEM), or -1 if an error occurred. */
1010 extern int getloadavg (double __loadavg[], int __nelem)
1011 __THROW __nonnull ((1));
1012 #endif
1013
1014 #if defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K
1015 /* Return the index into the active-logins file (utmp) for
1016 the controlling terminal. */
1017 extern int ttyslot (void) __THROW;
1018 #endif
1019
1020 #include <bits/stdlib-float.h>
1021
1022 /* Define some macros helping to catch buffer overflows. */
1023 #if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function
1024 # include <bits/stdlib.h>
1025 #endif
1026
1027 #include <bits/floatn.h>
1028 #if defined __LDBL_COMPAT || __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 1
1029 # include <bits/stdlib-ldbl.h>
1030 #endif
1031
1032 __END_DECLS
1033
1034 #endif /* stdlib.h */
1035