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1 : /* Copyright (C) 1991-2022 Free Software Foundation, Inc.
2 : Copyright The GNU Toolchain Authors.
3 : This file is part of the GNU C Library.
4 :
5 : The GNU C Library is free software; you can redistribute it and/or
6 : modify it under the terms of the GNU Lesser General Public
7 : License as published by the Free Software Foundation; either
8 : version 2.1 of the License, or (at your option) any later version.
9 :
10 : The GNU C Library is distributed in the hope that it will be useful,
11 : but WITHOUT ANY WARRANTY; without even the implied warranty of
12 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 : Lesser General Public License for more details.
14 :
15 : You should have received a copy of the GNU Lesser General Public
16 : License along with the GNU C Library; if not, see
17 : <https://www.gnu.org/licenses/>. */
18 :
19 : /*
20 : * ISO C99 Standard: 7.20 General utilities <stdlib.h>
21 : */
22 :
23 : #ifndef _STDLIB_H
24 :
25 : #define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION
26 : #include <bits/libc-header-start.h>
27 :
28 : /* Get size_t, wchar_t and NULL from <stddef.h>. */
29 : #define __need_size_t
30 : #define __need_wchar_t
31 : #define __need_NULL
32 : #include <stddef.h>
33 :
34 : __BEGIN_DECLS
35 :
36 : #define _STDLIB_H 1
37 :
38 : #if (defined __USE_XOPEN || defined __USE_XOPEN2K8) && !defined _SYS_WAIT_H
39 : /* XPG requires a few symbols from <sys/wait.h> being defined. */
40 : # include <bits/waitflags.h>
41 : # include <bits/waitstatus.h>
42 :
43 : /* Define the macros <sys/wait.h> also would define this way. */
44 : # define WEXITSTATUS(status) __WEXITSTATUS (status)
45 : # define WTERMSIG(status) __WTERMSIG (status)
46 : # define WSTOPSIG(status) __WSTOPSIG (status)
47 : # define WIFEXITED(status) __WIFEXITED (status)
48 : # define WIFSIGNALED(status) __WIFSIGNALED (status)
49 : # define WIFSTOPPED(status) __WIFSTOPPED (status)
50 : # ifdef __WIFCONTINUED
51 : # define WIFCONTINUED(status) __WIFCONTINUED (status)
52 : # endif
53 : #endif /* X/Open or XPG7 and <sys/wait.h> not included. */
54 :
55 : /* _FloatN API tests for enablement. */
56 : #include <bits/floatn.h>
57 :
58 : /* Returned by `div'. */
59 : typedef struct
60 : {
61 : int quot; /* Quotient. */
62 : int rem; /* Remainder. */
63 : } div_t;
64 :
65 : /* Returned by `ldiv'. */
66 : #ifndef __ldiv_t_defined
67 : typedef struct
68 : {
69 : long int quot; /* Quotient. */
70 : long int rem; /* Remainder. */
71 : } ldiv_t;
72 : # define __ldiv_t_defined 1
73 : #endif
74 :
75 : #if defined __USE_ISOC99 && !defined __lldiv_t_defined
76 : /* Returned by `lldiv'. */
77 : __extension__ typedef struct
78 : {
79 : long long int quot; /* Quotient. */
80 : long long int rem; /* Remainder. */
81 : } lldiv_t;
82 : # define __lldiv_t_defined 1
83 : #endif
84 :
85 :
86 : /* The largest number rand will return (same as INT_MAX). */
87 : #define RAND_MAX 2147483647
88 :
89 :
90 : /* We define these the same for all machines.
91 : Changes from this to the outside world should be done in `_exit'. */
92 : #define EXIT_FAILURE 1 /* Failing exit status. */
93 : #define EXIT_SUCCESS 0 /* Successful exit status. */
94 :
95 :
96 : /* Maximum length of a multibyte character in the current locale. */
97 : #define MB_CUR_MAX (__ctype_get_mb_cur_max ())
98 : extern size_t __ctype_get_mb_cur_max (void) __THROW __wur;
99 :
100 :
101 : /* Convert a string to a floating-point number. */
102 : extern double atof (const char *__nptr)
103 : __THROW __attribute_pure__ __nonnull ((1)) __wur;
104 : /* Convert a string to an integer. */
105 : extern int atoi (const char *__nptr)
106 : __THROW __attribute_pure__ __nonnull ((1)) __wur;
107 : /* Convert a string to a long integer. */
108 : extern long int atol (const char *__nptr)
109 : __THROW __attribute_pure__ __nonnull ((1)) __wur;
110 :
111 : #ifdef __USE_ISOC99
112 : /* Convert a string to a long long integer. */
113 : __extension__ extern long long int atoll (const char *__nptr)
114 : __THROW __attribute_pure__ __nonnull ((1)) __wur;
115 : #endif
116 :
117 : /* Convert a string to a floating-point number. */
118 : extern double strtod (const char *__restrict __nptr,
119 : char **__restrict __endptr)
120 : __THROW __nonnull ((1));
121 :
122 : #ifdef __USE_ISOC99
123 : /* Likewise for `float' and `long double' sizes of floating-point numbers. */
124 : extern float strtof (const char *__restrict __nptr,
125 : char **__restrict __endptr) __THROW __nonnull ((1));
126 :
127 : extern long double strtold (const char *__restrict __nptr,
128 : char **__restrict __endptr)
129 : __THROW __nonnull ((1));
130 : #endif
131 :
132 : /* Likewise for '_FloatN' and '_FloatNx'. */
133 :
134 : #if __HAVE_FLOAT16 && __GLIBC_USE (IEC_60559_TYPES_EXT)
135 : extern _Float16 strtof16 (const char *__restrict __nptr,
136 : char **__restrict __endptr)
137 : __THROW __nonnull ((1));
138 : #endif
139 :
140 : #if __HAVE_FLOAT32 && __GLIBC_USE (IEC_60559_TYPES_EXT)
141 : extern _Float32 strtof32 (const char *__restrict __nptr,
142 : char **__restrict __endptr)
143 : __THROW __nonnull ((1));
144 : #endif
145 :
146 : #if __HAVE_FLOAT64 && __GLIBC_USE (IEC_60559_TYPES_EXT)
147 : extern _Float64 strtof64 (const char *__restrict __nptr,
148 : char **__restrict __endptr)
149 : __THROW __nonnull ((1));
150 : #endif
151 :
152 : #if __HAVE_FLOAT128 && __GLIBC_USE (IEC_60559_TYPES_EXT)
153 : extern _Float128 strtof128 (const char *__restrict __nptr,
154 : char **__restrict __endptr)
155 : __THROW __nonnull ((1));
156 : #endif
157 :
158 : #if __HAVE_FLOAT32X && __GLIBC_USE (IEC_60559_TYPES_EXT)
159 : extern _Float32x strtof32x (const char *__restrict __nptr,
160 : char **__restrict __endptr)
161 : __THROW __nonnull ((1));
162 : #endif
163 :
164 : #if __HAVE_FLOAT64X && __GLIBC_USE (IEC_60559_TYPES_EXT)
165 : extern _Float64x strtof64x (const char *__restrict __nptr,
166 : char **__restrict __endptr)
167 : __THROW __nonnull ((1));
168 : #endif
169 :
170 : #if __HAVE_FLOAT128X && __GLIBC_USE (IEC_60559_TYPES_EXT)
171 : extern _Float128x strtof128x (const char *__restrict __nptr,
172 : char **__restrict __endptr)
173 : __THROW __nonnull ((1));
174 : #endif
175 :
176 : /* Convert a string to a long integer. */
177 : extern long int strtol (const char *__restrict __nptr,
178 : char **__restrict __endptr, int __base)
179 : __THROW __nonnull ((1));
180 : /* Convert a string to an unsigned long integer. */
181 : extern unsigned long int strtoul (const char *__restrict __nptr,
182 : char **__restrict __endptr, int __base)
183 : __THROW __nonnull ((1));
184 :
185 : #ifdef __USE_MISC
186 : /* Convert a string to a quadword integer. */
187 : __extension__
188 : extern long long int strtoq (const char *__restrict __nptr,
189 : char **__restrict __endptr, int __base)
190 : __THROW __nonnull ((1));
191 : /* Convert a string to an unsigned quadword integer. */
192 : __extension__
193 : extern unsigned long long int strtouq (const char *__restrict __nptr,
194 : char **__restrict __endptr, int __base)
195 : __THROW __nonnull ((1));
196 : #endif /* Use misc. */
197 :
198 : #ifdef __USE_ISOC99
199 : /* Convert a string to a quadword integer. */
200 : __extension__
201 : extern long long int strtoll (const char *__restrict __nptr,
202 : char **__restrict __endptr, int __base)
203 : __THROW __nonnull ((1));
204 : /* Convert a string to an unsigned quadword integer. */
205 : __extension__
206 : extern unsigned long long int strtoull (const char *__restrict __nptr,
207 : char **__restrict __endptr, int __base)
208 : __THROW __nonnull ((1));
209 : #endif /* ISO C99 or use MISC. */
210 :
211 : /* Convert a floating-point number to a string. */
212 : #if __GLIBC_USE (IEC_60559_BFP_EXT_C2X)
213 : extern int strfromd (char *__dest, size_t __size, const char *__format,
214 : double __f)
215 : __THROW __nonnull ((3));
216 :
217 : extern int strfromf (char *__dest, size_t __size, const char *__format,
218 : float __f)
219 : __THROW __nonnull ((3));
220 :
221 : extern int strfroml (char *__dest, size_t __size, const char *__format,
222 : long double __f)
223 : __THROW __nonnull ((3));
224 : #endif
225 :
226 : #if __HAVE_FLOAT16 && __GLIBC_USE (IEC_60559_TYPES_EXT)
227 : extern int strfromf16 (char *__dest, size_t __size, const char * __format,
228 : _Float16 __f)
229 : __THROW __nonnull ((3));
230 : #endif
231 :
232 : #if __HAVE_FLOAT32 && __GLIBC_USE (IEC_60559_TYPES_EXT)
233 : extern int strfromf32 (char *__dest, size_t __size, const char * __format,
234 : _Float32 __f)
235 : __THROW __nonnull ((3));
236 : #endif
237 :
238 : #if __HAVE_FLOAT64 && __GLIBC_USE (IEC_60559_TYPES_EXT)
239 : extern int strfromf64 (char *__dest, size_t __size, const char * __format,
240 : _Float64 __f)
241 : __THROW __nonnull ((3));
242 : #endif
243 :
244 : #if __HAVE_FLOAT128 && __GLIBC_USE (IEC_60559_TYPES_EXT)
245 : extern int strfromf128 (char *__dest, size_t __size, const char * __format,
246 : _Float128 __f)
247 : __THROW __nonnull ((3));
248 : #endif
249 :
250 : #if __HAVE_FLOAT32X && __GLIBC_USE (IEC_60559_TYPES_EXT)
251 : extern int strfromf32x (char *__dest, size_t __size, const char * __format,
252 : _Float32x __f)
253 : __THROW __nonnull ((3));
254 : #endif
255 :
256 : #if __HAVE_FLOAT64X && __GLIBC_USE (IEC_60559_TYPES_EXT)
257 : extern int strfromf64x (char *__dest, size_t __size, const char * __format,
258 : _Float64x __f)
259 : __THROW __nonnull ((3));
260 : #endif
261 :
262 : #if __HAVE_FLOAT128X && __GLIBC_USE (IEC_60559_TYPES_EXT)
263 : extern int strfromf128x (char *__dest, size_t __size, const char * __format,
264 : _Float128x __f)
265 : __THROW __nonnull ((3));
266 : #endif
267 :
268 :
269 : #ifdef __USE_GNU
270 : /* Parallel versions of the functions above which take the locale to
271 : use as an additional parameter. These are GNU extensions inspired
272 : by the POSIX.1-2008 extended locale API. */
273 : # include <bits/types/locale_t.h>
274 :
275 : extern long int strtol_l (const char *__restrict __nptr,
276 : char **__restrict __endptr, int __base,
277 : locale_t __loc) __THROW __nonnull ((1, 4));
278 :
279 : extern unsigned long int strtoul_l (const char *__restrict __nptr,
280 : char **__restrict __endptr,
281 : int __base, locale_t __loc)
282 : __THROW __nonnull ((1, 4));
283 :
284 : __extension__
285 : extern long long int strtoll_l (const char *__restrict __nptr,
286 : char **__restrict __endptr, int __base,
287 : locale_t __loc)
288 : __THROW __nonnull ((1, 4));
289 :
290 : __extension__
291 : extern unsigned long long int strtoull_l (const char *__restrict __nptr,
292 : char **__restrict __endptr,
293 : int __base, locale_t __loc)
294 : __THROW __nonnull ((1, 4));
295 :
296 : extern double strtod_l (const char *__restrict __nptr,
297 : char **__restrict __endptr, locale_t __loc)
298 : __THROW __nonnull ((1, 3));
299 :
300 : extern float strtof_l (const char *__restrict __nptr,
301 : char **__restrict __endptr, locale_t __loc)
302 : __THROW __nonnull ((1, 3));
303 :
304 : extern long double strtold_l (const char *__restrict __nptr,
305 : char **__restrict __endptr,
306 : locale_t __loc)
307 : __THROW __nonnull ((1, 3));
308 :
309 : # if __HAVE_FLOAT16
310 : extern _Float16 strtof16_l (const char *__restrict __nptr,
311 : char **__restrict __endptr,
312 : locale_t __loc)
313 : __THROW __nonnull ((1, 3));
314 : # endif
315 :
316 : # if __HAVE_FLOAT32
317 : extern _Float32 strtof32_l (const char *__restrict __nptr,
318 : char **__restrict __endptr,
319 : locale_t __loc)
320 : __THROW __nonnull ((1, 3));
321 : # endif
322 :
323 : # if __HAVE_FLOAT64
324 : extern _Float64 strtof64_l (const char *__restrict __nptr,
325 : char **__restrict __endptr,
326 : locale_t __loc)
327 : __THROW __nonnull ((1, 3));
328 : # endif
329 :
330 : # if __HAVE_FLOAT128
331 : extern _Float128 strtof128_l (const char *__restrict __nptr,
332 : char **__restrict __endptr,
333 : locale_t __loc)
334 : __THROW __nonnull ((1, 3));
335 : # endif
336 :
337 : # if __HAVE_FLOAT32X
338 : extern _Float32x strtof32x_l (const char *__restrict __nptr,
339 : char **__restrict __endptr,
340 : locale_t __loc)
341 : __THROW __nonnull ((1, 3));
342 : # endif
343 :
344 : # if __HAVE_FLOAT64X
345 : extern _Float64x strtof64x_l (const char *__restrict __nptr,
346 : char **__restrict __endptr,
347 : locale_t __loc)
348 : __THROW __nonnull ((1, 3));
349 : # endif
350 :
351 : # if __HAVE_FLOAT128X
352 : extern _Float128x strtof128x_l (const char *__restrict __nptr,
353 : char **__restrict __endptr,
354 : locale_t __loc)
355 : __THROW __nonnull ((1, 3));
356 : # endif
357 : #endif /* GNU */
358 :
359 :
360 : #ifdef __USE_EXTERN_INLINES
361 : __extern_inline int
362 47953 : __NTH (atoi (const char *__nptr))
363 : {
364 47953 : return (int) strtol (__nptr, (char **) NULL, 10);
365 : }
366 : __extern_inline long int
367 0 : __NTH (atol (const char *__nptr))
368 : {
369 0 : return strtol (__nptr, (char **) NULL, 10);
370 : }
371 :
372 : # ifdef __USE_ISOC99
373 : __extension__ __extern_inline long long int
374 : __NTH (atoll (const char *__nptr))
375 : {
376 : return strtoll (__nptr, (char **) NULL, 10);
377 : }
378 : # endif
379 : #endif /* Optimizing and Inlining. */
380 :
381 :
382 : #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
383 : /* Convert N to base 64 using the digits "./0-9A-Za-z", least-significant
384 : digit first. Returns a pointer to static storage overwritten by the
385 : next call. */
386 : extern char *l64a (long int __n) __THROW __wur;
387 :
388 : /* Read a number from a string S in base 64 as above. */
389 : extern long int a64l (const char *__s)
390 : __THROW __attribute_pure__ __nonnull ((1)) __wur;
391 :
392 : #endif /* Use misc || extended X/Open. */
393 :
394 : #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
395 : # include <sys/types.h> /* we need int32_t... */
396 :
397 : /* These are the functions that actually do things. The `random', `srandom',
398 : `initstate' and `setstate' functions are those from BSD Unices.
399 : The `rand' and `srand' functions are required by the ANSI standard.
400 : We provide both interfaces to the same random number generator. */
401 : /* Return a random long integer between 0 and 2^31-1 inclusive. */
402 : extern long int random (void) __THROW;
403 :
404 : /* Seed the random number generator with the given number. */
405 : extern void srandom (unsigned int __seed) __THROW;
406 :
407 : /* Initialize the random number generator to use state buffer STATEBUF,
408 : of length STATELEN, and seed it with SEED. Optimal lengths are 8, 16,
409 : 32, 64, 128 and 256, the bigger the better; values less than 8 will
410 : cause an error and values greater than 256 will be rounded down. */
411 : extern char *initstate (unsigned int __seed, char *__statebuf,
412 : size_t __statelen) __THROW __nonnull ((2));
413 :
414 : /* Switch the random number generator to state buffer STATEBUF,
415 : which should have been previously initialized by `initstate'. */
416 : extern char *setstate (char *__statebuf) __THROW __nonnull ((1));
417 :
418 :
419 : # ifdef __USE_MISC
420 : /* Reentrant versions of the `random' family of functions.
421 : These functions all use the following data structure to contain
422 : state, rather than global state variables. */
423 :
424 : struct random_data
425 : {
426 : int32_t *fptr; /* Front pointer. */
427 : int32_t *rptr; /* Rear pointer. */
428 : int32_t *state; /* Array of state values. */
429 : int rand_type; /* Type of random number generator. */
430 : int rand_deg; /* Degree of random number generator. */
431 : int rand_sep; /* Distance between front and rear. */
432 : int32_t *end_ptr; /* Pointer behind state table. */
433 : };
434 :
435 : extern int random_r (struct random_data *__restrict __buf,
436 : int32_t *__restrict __result) __THROW __nonnull ((1, 2));
437 :
438 : extern int srandom_r (unsigned int __seed, struct random_data *__buf)
439 : __THROW __nonnull ((2));
440 :
441 : extern int initstate_r (unsigned int __seed, char *__restrict __statebuf,
442 : size_t __statelen,
443 : struct random_data *__restrict __buf)
444 : __THROW __nonnull ((2, 4));
445 :
446 : extern int setstate_r (char *__restrict __statebuf,
447 : struct random_data *__restrict __buf)
448 : __THROW __nonnull ((1, 2));
449 : # endif /* Use misc. */
450 : #endif /* Use extended X/Open || misc. */
451 :
452 :
453 : /* Return a random integer between 0 and RAND_MAX inclusive. */
454 : extern int rand (void) __THROW;
455 : /* Seed the random number generator with the given number. */
456 : extern void srand (unsigned int __seed) __THROW;
457 :
458 : #ifdef __USE_POSIX199506
459 : /* Reentrant interface according to POSIX.1. */
460 : extern int rand_r (unsigned int *__seed) __THROW;
461 : #endif
462 :
463 :
464 : #if defined __USE_MISC || defined __USE_XOPEN
465 : /* System V style 48-bit random number generator functions. */
466 :
467 : /* Return non-negative, double-precision floating-point value in [0.0,1.0). */
468 : extern double drand48 (void) __THROW;
469 : extern double erand48 (unsigned short int __xsubi[3]) __THROW __nonnull ((1));
470 :
471 : /* Return non-negative, long integer in [0,2^31). */
472 : extern long int lrand48 (void) __THROW;
473 : extern long int nrand48 (unsigned short int __xsubi[3])
474 : __THROW __nonnull ((1));
475 :
476 : /* Return signed, long integers in [-2^31,2^31). */
477 : extern long int mrand48 (void) __THROW;
478 : extern long int jrand48 (unsigned short int __xsubi[3])
479 : __THROW __nonnull ((1));
480 :
481 : /* Seed random number generator. */
482 : extern void srand48 (long int __seedval) __THROW;
483 : extern unsigned short int *seed48 (unsigned short int __seed16v[3])
484 : __THROW __nonnull ((1));
485 : extern void lcong48 (unsigned short int __param[7]) __THROW __nonnull ((1));
486 :
487 : # ifdef __USE_MISC
488 : /* Data structure for communication with thread safe versions. This
489 : type is to be regarded as opaque. It's only exported because users
490 : have to allocate objects of this type. */
491 : struct drand48_data
492 : {
493 : unsigned short int __x[3]; /* Current state. */
494 : unsigned short int __old_x[3]; /* Old state. */
495 : unsigned short int __c; /* Additive const. in congruential formula. */
496 : unsigned short int __init; /* Flag for initializing. */
497 : __extension__ unsigned long long int __a; /* Factor in congruential
498 : formula. */
499 : };
500 :
501 : /* Return non-negative, double-precision floating-point value in [0.0,1.0). */
502 : extern int drand48_r (struct drand48_data *__restrict __buffer,
503 : double *__restrict __result) __THROW __nonnull ((1, 2));
504 : extern int erand48_r (unsigned short int __xsubi[3],
505 : struct drand48_data *__restrict __buffer,
506 : double *__restrict __result) __THROW __nonnull ((1, 2));
507 :
508 : /* Return non-negative, long integer in [0,2^31). */
509 : extern int lrand48_r (struct drand48_data *__restrict __buffer,
510 : long int *__restrict __result)
511 : __THROW __nonnull ((1, 2));
512 : extern int nrand48_r (unsigned short int __xsubi[3],
513 : struct drand48_data *__restrict __buffer,
514 : long int *__restrict __result)
515 : __THROW __nonnull ((1, 2));
516 :
517 : /* Return signed, long integers in [-2^31,2^31). */
518 : extern int mrand48_r (struct drand48_data *__restrict __buffer,
519 : long int *__restrict __result)
520 : __THROW __nonnull ((1, 2));
521 : extern int jrand48_r (unsigned short int __xsubi[3],
522 : struct drand48_data *__restrict __buffer,
523 : long int *__restrict __result)
524 : __THROW __nonnull ((1, 2));
525 :
526 : /* Seed random number generator. */
527 : extern int srand48_r (long int __seedval, struct drand48_data *__buffer)
528 : __THROW __nonnull ((2));
529 :
530 : extern int seed48_r (unsigned short int __seed16v[3],
531 : struct drand48_data *__buffer) __THROW __nonnull ((1, 2));
532 :
533 : extern int lcong48_r (unsigned short int __param[7],
534 : struct drand48_data *__buffer)
535 : __THROW __nonnull ((1, 2));
536 : # endif /* Use misc. */
537 : #endif /* Use misc or X/Open. */
538 :
539 : /* Allocate SIZE bytes of memory. */
540 : extern void *malloc (size_t __size) __THROW __attribute_malloc__
541 : __attribute_alloc_size__ ((1)) __wur;
542 : /* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */
543 : extern void *calloc (size_t __nmemb, size_t __size)
544 : __THROW __attribute_malloc__ __attribute_alloc_size__ ((1, 2)) __wur;
545 :
546 : /* Re-allocate the previously allocated block
547 : in PTR, making the new block SIZE bytes long. */
548 : /* __attribute_malloc__ is not used, because if realloc returns
549 : the same pointer that was passed to it, aliasing needs to be allowed
550 : between objects pointed by the old and new pointers. */
551 : extern void *realloc (void *__ptr, size_t __size)
552 : __THROW __attribute_warn_unused_result__ __attribute_alloc_size__ ((2));
553 :
554 : /* Free a block allocated by `malloc', `realloc' or `calloc'. */
555 : extern void free (void *__ptr) __THROW;
556 :
557 : #ifdef __USE_MISC
558 : /* Re-allocate the previously allocated block in PTR, making the new
559 : block large enough for NMEMB elements of SIZE bytes each. */
560 : /* __attribute_malloc__ is not used, because if reallocarray returns
561 : the same pointer that was passed to it, aliasing needs to be allowed
562 : between objects pointed by the old and new pointers. */
563 : extern void *reallocarray (void *__ptr, size_t __nmemb, size_t __size)
564 : __THROW __attribute_warn_unused_result__
565 : __attribute_alloc_size__ ((2, 3))
566 : __attr_dealloc_free;
567 :
568 : /* Add reallocarray as its own deallocator. */
569 : extern void *reallocarray (void *__ptr, size_t __nmemb, size_t __size)
570 : __THROW __attr_dealloc (reallocarray, 1);
571 : #endif
572 :
573 : #ifdef __USE_MISC
574 : # include <alloca.h>
575 : #endif /* Use misc. */
576 :
577 : #if (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K) \
578 : || defined __USE_MISC
579 : /* Allocate SIZE bytes on a page boundary. The storage cannot be freed. */
580 : extern void *valloc (size_t __size) __THROW __attribute_malloc__
581 : __attribute_alloc_size__ ((1)) __wur;
582 : #endif
583 :
584 : #ifdef __USE_XOPEN2K
585 : /* Allocate memory of SIZE bytes with an alignment of ALIGNMENT. */
586 : extern int posix_memalign (void **__memptr, size_t __alignment, size_t __size)
587 : __THROW __nonnull ((1)) __wur;
588 : #endif
589 :
590 : #ifdef __USE_ISOC11
591 : /* ISO C variant of aligned allocation. */
592 : extern void *aligned_alloc (size_t __alignment, size_t __size)
593 : __THROW __attribute_malloc__ __attribute_alloc_align__ ((1))
594 : __attribute_alloc_size__ ((2)) __wur;
595 : #endif
596 :
597 : /* Abort execution and generate a core-dump. */
598 : extern void abort (void) __THROW __attribute__ ((__noreturn__));
599 :
600 :
601 : /* Register a function to be called when `exit' is called. */
602 : extern int atexit (void (*__func) (void)) __THROW __nonnull ((1));
603 :
604 : #if defined __USE_ISOC11 || defined __USE_ISOCXX11
605 : /* Register a function to be called when `quick_exit' is called. */
606 : # ifdef __cplusplus
607 : extern "C++" int at_quick_exit (void (*__func) (void))
608 : __THROW __asm ("at_quick_exit") __nonnull ((1));
609 : # else
610 : extern int at_quick_exit (void (*__func) (void)) __THROW __nonnull ((1));
611 : # endif
612 : #endif
613 :
614 : #ifdef __USE_MISC
615 : /* Register a function to be called with the status
616 : given to `exit' and the given argument. */
617 : extern int on_exit (void (*__func) (int __status, void *__arg), void *__arg)
618 : __THROW __nonnull ((1));
619 : #endif
620 :
621 : /* Call all functions registered with `atexit' and `on_exit',
622 : in the reverse of the order in which they were registered,
623 : perform stdio cleanup, and terminate program execution with STATUS. */
624 : extern void exit (int __status) __THROW __attribute__ ((__noreturn__));
625 :
626 : #if defined __USE_ISOC11 || defined __USE_ISOCXX11
627 : /* Call all functions registered with `at_quick_exit' in the reverse
628 : of the order in which they were registered and terminate program
629 : execution with STATUS. */
630 : extern void quick_exit (int __status) __THROW __attribute__ ((__noreturn__));
631 : #endif
632 :
633 : #ifdef __USE_ISOC99
634 : /* Terminate the program with STATUS without calling any of the
635 : functions registered with `atexit' or `on_exit'. */
636 : extern void _Exit (int __status) __THROW __attribute__ ((__noreturn__));
637 : #endif
638 :
639 :
640 : /* Return the value of envariable NAME, or NULL if it doesn't exist. */
641 : extern char *getenv (const char *__name) __THROW __nonnull ((1)) __wur;
642 :
643 : #ifdef __USE_GNU
644 : /* This function is similar to the above but returns NULL if the
645 : programs is running with SUID or SGID enabled. */
646 : extern char *secure_getenv (const char *__name)
647 : __THROW __nonnull ((1)) __wur;
648 : #endif
649 :
650 : #if defined __USE_MISC || defined __USE_XOPEN
651 : /* The SVID says this is in <stdio.h>, but this seems a better place. */
652 : /* Put STRING, which is of the form "NAME=VALUE", in the environment.
653 : If there is no `=', remove NAME from the environment. */
654 : extern int putenv (char *__string) __THROW __nonnull ((1));
655 : #endif
656 :
657 : #ifdef __USE_XOPEN2K
658 : /* Set NAME to VALUE in the environment.
659 : If REPLACE is nonzero, overwrite an existing value. */
660 : extern int setenv (const char *__name, const char *__value, int __replace)
661 : __THROW __nonnull ((2));
662 :
663 : /* Remove the variable NAME from the environment. */
664 : extern int unsetenv (const char *__name) __THROW __nonnull ((1));
665 : #endif
666 :
667 : #ifdef __USE_MISC
668 : /* The `clearenv' was planned to be added to POSIX.1 but probably
669 : never made it. Nevertheless the POSIX.9 standard (POSIX bindings
670 : for Fortran 77) requires this function. */
671 : extern int clearenv (void) __THROW;
672 : #endif
673 :
674 :
675 : #if defined __USE_MISC \
676 : || (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K8)
677 : /* Generate a unique temporary file name from TEMPLATE.
678 : The last six characters of TEMPLATE must be "XXXXXX";
679 : they are replaced with a string that makes the file name unique.
680 : Always returns TEMPLATE, it's either a temporary file name or a null
681 : string if it cannot get a unique file name. */
682 : extern char *mktemp (char *__template) __THROW __nonnull ((1));
683 : #endif
684 :
685 : #if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
686 : /* Generate a unique temporary file name from TEMPLATE.
687 : The last six characters of TEMPLATE must be "XXXXXX";
688 : they are replaced with a string that makes the filename unique.
689 : Returns a file descriptor open on the file for reading and writing,
690 : or -1 if it cannot create a uniquely-named file.
691 :
692 : This function is a possible cancellation point and therefore not
693 : marked with __THROW. */
694 : # ifndef __USE_FILE_OFFSET64
695 : extern int mkstemp (char *__template) __nonnull ((1)) __wur;
696 : # else
697 : # ifdef __REDIRECT
698 : extern int __REDIRECT (mkstemp, (char *__template), mkstemp64)
699 : __nonnull ((1)) __wur;
700 : # else
701 : # define mkstemp mkstemp64
702 : # endif
703 : # endif
704 : # ifdef __USE_LARGEFILE64
705 : extern int mkstemp64 (char *__template) __nonnull ((1)) __wur;
706 : # endif
707 : #endif
708 :
709 : #ifdef __USE_MISC
710 : /* Similar to mkstemp, but the template can have a suffix after the
711 : XXXXXX. The length of the suffix is specified in the second
712 : parameter.
713 :
714 : This function is a possible cancellation point and therefore not
715 : marked with __THROW. */
716 : # ifndef __USE_FILE_OFFSET64
717 : extern int mkstemps (char *__template, int __suffixlen) __nonnull ((1)) __wur;
718 : # else
719 : # ifdef __REDIRECT
720 : extern int __REDIRECT (mkstemps, (char *__template, int __suffixlen),
721 : mkstemps64) __nonnull ((1)) __wur;
722 : # else
723 : # define mkstemps mkstemps64
724 : # endif
725 : # endif
726 : # ifdef __USE_LARGEFILE64
727 : extern int mkstemps64 (char *__template, int __suffixlen)
728 : __nonnull ((1)) __wur;
729 : # endif
730 : #endif
731 :
732 : #ifdef __USE_XOPEN2K8
733 : /* Create a unique temporary directory from TEMPLATE.
734 : The last six characters of TEMPLATE must be "XXXXXX";
735 : they are replaced with a string that makes the directory name unique.
736 : Returns TEMPLATE, or a null pointer if it cannot get a unique name.
737 : The directory is created mode 700. */
738 : extern char *mkdtemp (char *__template) __THROW __nonnull ((1)) __wur;
739 : #endif
740 :
741 : #ifdef __USE_GNU
742 : /* Generate a unique temporary file name from TEMPLATE similar to
743 : mkstemp. But allow the caller to pass additional flags which are
744 : used in the open call to create the file..
745 :
746 : This function is a possible cancellation point and therefore not
747 : marked with __THROW. */
748 : # ifndef __USE_FILE_OFFSET64
749 : extern int mkostemp (char *__template, int __flags) __nonnull ((1)) __wur;
750 : # else
751 : # ifdef __REDIRECT
752 : extern int __REDIRECT (mkostemp, (char *__template, int __flags), mkostemp64)
753 : __nonnull ((1)) __wur;
754 : # else
755 : # define mkostemp mkostemp64
756 : # endif
757 : # endif
758 : # ifdef __USE_LARGEFILE64
759 : extern int mkostemp64 (char *__template, int __flags) __nonnull ((1)) __wur;
760 : # endif
761 :
762 : /* Similar to mkostemp, but the template can have a suffix after the
763 : XXXXXX. The length of the suffix is specified in the second
764 : parameter.
765 :
766 : This function is a possible cancellation point and therefore not
767 : marked with __THROW. */
768 : # ifndef __USE_FILE_OFFSET64
769 : extern int mkostemps (char *__template, int __suffixlen, int __flags)
770 : __nonnull ((1)) __wur;
771 : # else
772 : # ifdef __REDIRECT
773 : extern int __REDIRECT (mkostemps, (char *__template, int __suffixlen,
774 : int __flags), mkostemps64)
775 : __nonnull ((1)) __wur;
776 : # else
777 : # define mkostemps mkostemps64
778 : # endif
779 : # endif
780 : # ifdef __USE_LARGEFILE64
781 : extern int mkostemps64 (char *__template, int __suffixlen, int __flags)
782 : __nonnull ((1)) __wur;
783 : # endif
784 : #endif
785 :
786 :
787 : /* Execute the given line as a shell command.
788 :
789 : This function is a cancellation point and therefore not marked with
790 : __THROW. */
791 : extern int system (const char *__command) __wur;
792 :
793 :
794 : #ifdef __USE_GNU
795 : /* Return a malloc'd string containing the canonical absolute name of the
796 : existing named file. */
797 : extern char *canonicalize_file_name (const char *__name)
798 : __THROW __nonnull ((1)) __attribute_malloc__
799 : __attr_dealloc_free __wur;
800 : #endif
801 :
802 : #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
803 : /* Return the canonical absolute name of file NAME. If RESOLVED is
804 : null, the result is malloc'd; otherwise, if the canonical name is
805 : PATH_MAX chars or more, returns null with `errno' set to
806 : ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars,
807 : returns the name in RESOLVED. */
808 : extern char *realpath (const char *__restrict __name,
809 : char *__restrict __resolved) __THROW __wur;
810 : #endif
811 :
812 :
813 : /* Shorthand for type of comparison functions. */
814 : #ifndef __COMPAR_FN_T
815 : # define __COMPAR_FN_T
816 : typedef int (*__compar_fn_t) (const void *, const void *);
817 :
818 : # ifdef __USE_GNU
819 : typedef __compar_fn_t comparison_fn_t;
820 : # endif
821 : #endif
822 : #ifdef __USE_GNU
823 : typedef int (*__compar_d_fn_t) (const void *, const void *, void *);
824 : #endif
825 :
826 : /* Do a binary search for KEY in BASE, which consists of NMEMB elements
827 : of SIZE bytes each, using COMPAR to perform the comparisons. */
828 : extern void *bsearch (const void *__key, const void *__base,
829 : size_t __nmemb, size_t __size, __compar_fn_t __compar)
830 : __nonnull ((1, 2, 5)) __wur;
831 :
832 : #ifdef __USE_EXTERN_INLINES
833 : # include <bits/stdlib-bsearch.h>
834 : #endif
835 :
836 : /* Sort NMEMB elements of BASE, of SIZE bytes each,
837 : using COMPAR to perform the comparisons. */
838 : extern void qsort (void *__base, size_t __nmemb, size_t __size,
839 : __compar_fn_t __compar) __nonnull ((1, 4));
840 : #ifdef __USE_GNU
841 : extern void qsort_r (void *__base, size_t __nmemb, size_t __size,
842 : __compar_d_fn_t __compar, void *__arg)
843 : __nonnull ((1, 4));
844 : #endif
845 :
846 :
847 : /* Return the absolute value of X. */
848 : extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur;
849 : extern long int labs (long int __x) __THROW __attribute__ ((__const__)) __wur;
850 :
851 : #ifdef __USE_ISOC99
852 : __extension__ extern long long int llabs (long long int __x)
853 : __THROW __attribute__ ((__const__)) __wur;
854 : #endif
855 :
856 :
857 : /* Return the `div_t', `ldiv_t' or `lldiv_t' representation
858 : of the value of NUMER over DENOM. */
859 : /* GCC may have built-ins for these someday. */
860 : extern div_t div (int __numer, int __denom)
861 : __THROW __attribute__ ((__const__)) __wur;
862 : extern ldiv_t ldiv (long int __numer, long int __denom)
863 : __THROW __attribute__ ((__const__)) __wur;
864 :
865 : #ifdef __USE_ISOC99
866 : __extension__ extern lldiv_t lldiv (long long int __numer,
867 : long long int __denom)
868 : __THROW __attribute__ ((__const__)) __wur;
869 : #endif
870 :
871 :
872 : #if (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K8) \
873 : || defined __USE_MISC
874 : /* Convert floating point numbers to strings. The returned values are
875 : valid only until another call to the same function. */
876 :
877 : /* Convert VALUE to a string with NDIGIT digits and return a pointer to
878 : this. Set *DECPT with the position of the decimal character and *SIGN
879 : with the sign of the number. */
880 : extern char *ecvt (double __value, int __ndigit, int *__restrict __decpt,
881 : int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur;
882 :
883 : /* Convert VALUE to a string rounded to NDIGIT decimal digits. Set *DECPT
884 : with the position of the decimal character and *SIGN with the sign of
885 : the number. */
886 : extern char *fcvt (double __value, int __ndigit, int *__restrict __decpt,
887 : int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur;
888 :
889 : /* If possible convert VALUE to a string with NDIGIT significant digits.
890 : Otherwise use exponential representation. The resulting string will
891 : be written to BUF. */
892 : extern char *gcvt (double __value, int __ndigit, char *__buf)
893 : __THROW __nonnull ((3)) __wur;
894 : #endif
895 :
896 : #ifdef __USE_MISC
897 : /* Long double versions of above functions. */
898 : extern char *qecvt (long double __value, int __ndigit,
899 : int *__restrict __decpt, int *__restrict __sign)
900 : __THROW __nonnull ((3, 4)) __wur;
901 : extern char *qfcvt (long double __value, int __ndigit,
902 : int *__restrict __decpt, int *__restrict __sign)
903 : __THROW __nonnull ((3, 4)) __wur;
904 : extern char *qgcvt (long double __value, int __ndigit, char *__buf)
905 : __THROW __nonnull ((3)) __wur;
906 :
907 :
908 : /* Reentrant version of the functions above which provide their own
909 : buffers. */
910 : extern int ecvt_r (double __value, int __ndigit, int *__restrict __decpt,
911 : int *__restrict __sign, char *__restrict __buf,
912 : size_t __len) __THROW __nonnull ((3, 4, 5));
913 : extern int fcvt_r (double __value, int __ndigit, int *__restrict __decpt,
914 : int *__restrict __sign, char *__restrict __buf,
915 : size_t __len) __THROW __nonnull ((3, 4, 5));
916 :
917 : extern int qecvt_r (long double __value, int __ndigit,
918 : int *__restrict __decpt, int *__restrict __sign,
919 : char *__restrict __buf, size_t __len)
920 : __THROW __nonnull ((3, 4, 5));
921 : extern int qfcvt_r (long double __value, int __ndigit,
922 : int *__restrict __decpt, int *__restrict __sign,
923 : char *__restrict __buf, size_t __len)
924 : __THROW __nonnull ((3, 4, 5));
925 : #endif /* misc */
926 :
927 :
928 : /* Return the length of the multibyte character
929 : in S, which is no longer than N. */
930 : extern int mblen (const char *__s, size_t __n) __THROW;
931 : /* Return the length of the given multibyte character,
932 : putting its `wchar_t' representation in *PWC. */
933 : extern int mbtowc (wchar_t *__restrict __pwc,
934 : const char *__restrict __s, size_t __n) __THROW;
935 : /* Put the multibyte character represented
936 : by WCHAR in S, returning its length. */
937 : extern int wctomb (char *__s, wchar_t __wchar) __THROW;
938 :
939 :
940 : /* Convert a multibyte string to a wide char string. */
941 : extern size_t mbstowcs (wchar_t *__restrict __pwcs,
942 : const char *__restrict __s, size_t __n) __THROW
943 : __attr_access ((__read_only__, 2));
944 : /* Convert a wide char string to multibyte string. */
945 : extern size_t wcstombs (char *__restrict __s,
946 : const wchar_t *__restrict __pwcs, size_t __n)
947 : __THROW
948 : __fortified_attr_access (__write_only__, 1, 3)
949 : __attr_access ((__read_only__, 2));
950 :
951 : #ifdef __USE_MISC
952 : /* Determine whether the string value of RESPONSE matches the affirmation
953 : or negative response expression as specified by the LC_MESSAGES category
954 : in the program's current locale. Returns 1 if affirmative, 0 if
955 : negative, and -1 if not matching. */
956 : extern int rpmatch (const char *__response) __THROW __nonnull ((1)) __wur;
957 : #endif
958 :
959 :
960 : #if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
961 : /* Parse comma separated suboption from *OPTIONP and match against
962 : strings in TOKENS. If found return index and set *VALUEP to
963 : optional value introduced by an equal sign. If the suboption is
964 : not part of TOKENS return in *VALUEP beginning of unknown
965 : suboption. On exit *OPTIONP is set to the beginning of the next
966 : token or at the terminating NUL character. */
967 : extern int getsubopt (char **__restrict __optionp,
968 : char *const *__restrict __tokens,
969 : char **__restrict __valuep)
970 : __THROW __nonnull ((1, 2, 3)) __wur;
971 : #endif
972 :
973 :
974 : /* X/Open pseudo terminal handling. */
975 :
976 : #ifdef __USE_XOPEN2KXSI
977 : /* Return a master pseudo-terminal handle. */
978 : extern int posix_openpt (int __oflag) __wur;
979 : #endif
980 :
981 : #ifdef __USE_XOPEN_EXTENDED
982 : /* The next four functions all take a master pseudo-tty fd and
983 : perform an operation on the associated slave: */
984 :
985 : /* Chown the slave to the calling user. */
986 : extern int grantpt (int __fd) __THROW;
987 :
988 : /* Release an internal lock so the slave can be opened.
989 : Call after grantpt(). */
990 : extern int unlockpt (int __fd) __THROW;
991 :
992 : /* Return the pathname of the pseudo terminal slave associated with
993 : the master FD is open on, or NULL on errors.
994 : The returned storage is good until the next call to this function. */
995 : extern char *ptsname (int __fd) __THROW __wur;
996 : #endif
997 :
998 : #ifdef __USE_GNU
999 : /* Store at most BUFLEN characters of the pathname of the slave pseudo
1000 : terminal associated with the master FD is open on in BUF.
1001 : Return 0 on success, otherwise an error number. */
1002 : extern int ptsname_r (int __fd, char *__buf, size_t __buflen)
1003 : __THROW __nonnull ((2)) __fortified_attr_access (__write_only__, 2, 3);
1004 :
1005 : /* Open a master pseudo terminal and return its file descriptor. */
1006 : extern int getpt (void);
1007 : #endif
1008 :
1009 : #ifdef __USE_MISC
1010 : /* Put the 1 minute, 5 minute and 15 minute load averages into the first
1011 : NELEM elements of LOADAVG. Return the number written (never more than
1012 : three, but may be less than NELEM), or -1 if an error occurred. */
1013 : extern int getloadavg (double __loadavg[], int __nelem)
1014 : __THROW __nonnull ((1));
1015 : #endif
1016 :
1017 : #if defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K
1018 : /* Return the index into the active-logins file (utmp) for
1019 : the controlling terminal. */
1020 : extern int ttyslot (void) __THROW;
1021 : #endif
1022 :
1023 : #include <bits/stdlib-float.h>
1024 :
1025 : /* Define some macros helping to catch buffer overflows. */
1026 : #if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function
1027 : # include <bits/stdlib.h>
1028 : #endif
1029 :
1030 : #include <bits/floatn.h>
1031 : #if defined __LDBL_COMPAT || __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 1
1032 : # include <bits/stdlib-ldbl.h>
1033 : #endif
1034 :
1035 : __END_DECLS
1036 :
1037 : #endif /* stdlib.h */
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