1/* Copyright (C) 1991-2020 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'. */ 
58typedef struct 
59 { 
60 int quot; /* Quotient. */ 
61 int rem; /* Remainder. */ 
62 } div_t; 
63 
64/* Returned by `ldiv'. */ 
65#ifndef __ldiv_t_defined 
66typedef 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 ()) 
97extern size_t __ctype_get_mb_cur_max (void) __THROW __wur; 
98 
99 
100/* Convert a string to a floating-point number. */ 
101extern double atof (const char *__nptr) 
102 __THROW __attribute_pure__ __nonnull ((1)) __wur; 
103/* Convert a string to an integer. */ 
104extern int atoi (const char *__nptr) 
105 __THROW __attribute_pure__ __nonnull ((1)) __wur; 
106/* Convert a string to a long integer. */ 
107extern 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. */ 
117extern 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. */ 
123extern float strtof (const char *__restrict __nptr, 
124 char **__restrict __endptr) __THROW __nonnull ((1)); 
125 
126extern 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) 
134extern _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) 
140extern _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) 
146extern _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) 
152extern _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) 
158extern _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) 
164extern _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) 
170extern _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. */ 
176extern 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. */ 
180extern 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__ 
187extern 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__ 
192extern 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__ 
200extern 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__ 
205extern 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) 
212extern int strfromd (char *__dest, size_t __size, const char *__format, 
213 double __f) 
214 __THROW __nonnull ((3)); 
215 
216extern int strfromf (char *__dest, size_t __size, const char *__format, 
217 float __f) 
218 __THROW __nonnull ((3)); 
219 
220extern 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) 
226extern 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) 
232extern 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) 
238extern 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) 
244extern 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) 
250extern 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) 
256extern 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) 
262extern 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 
274extern long int strtol_l (const char *__restrict __nptr, 
275 char **__restrict __endptr, int __base, 
276 locale_t __loc) __THROW __nonnull ((1, 4)); 
277 
278extern 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__ 
284extern 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__ 
290extern 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 
295extern double strtod_l (const char *__restrict __nptr, 
296 char **__restrict __endptr, locale_t __loc) 
297 __THROW __nonnull ((1, 3)); 
298 
299extern float strtof_l (const char *__restrict __nptr, 
300 char **__restrict __endptr, locale_t __loc) 
301 __THROW __nonnull ((1, 3)); 
302 
303extern 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 
309extern _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 
316extern _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 
323extern _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 
330extern _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 
337extern _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 
344extern _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 
351extern _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 
361__NTH (atoi (const char *__nptr)) 
362{ 
363 return (int) strtol (__nptr, (char **) NULL, 10); 
364} 
365__extern_inline long int 
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 
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. */ 
385extern char *l64a (long int __n) __THROW __wur; 
386 
387/* Read a number from a string S in base 64 as above. */ 
388extern 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 RAND_MAX inclusive. */ 
401extern long int random (void) __THROW; 
402 
403/* Seed the random number generator with the given number. */ 
404extern 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. */ 
410extern 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'. */ 
415extern 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 
423struct 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 
434extern int random_r (struct random_data *__restrict __buf, 
435 int32_t *__restrict __result) __THROW __nonnull ((1, 2)); 
436 
437extern int srandom_r (unsigned int __seed, struct random_data *__buf) 
438 __THROW __nonnull ((2)); 
439 
440extern 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 
445extern 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. */ 
453extern int rand (void) __THROW; 
454/* Seed the random number generator with the given number. */ 
455extern void srand (unsigned int __seed) __THROW; 
456 
457#ifdef __USE_POSIX199506 
458/* Reentrant interface according to POSIX.1. */ 
459extern 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). */ 
467extern double drand48 (void) __THROW; 
468extern double erand48 (unsigned short int __xsubi[3]) __THROW __nonnull ((1)); 
469 
470/* Return non-negative, long integer in [0,2^31). */ 
471extern long int lrand48 (void) __THROW; 
472extern long int nrand48 (unsigned short int __xsubi[3]) 
473 __THROW __nonnull ((1)); 
474 
475/* Return signed, long integers in [-2^31,2^31). */ 
476extern long int mrand48 (void) __THROW; 
477extern long int jrand48 (unsigned short int __xsubi[3]) 
478 __THROW __nonnull ((1)); 
479 
480/* Seed random number generator. */ 
481extern void srand48 (long int __seedval) __THROW; 
482extern unsigned short int *seed48 (unsigned short int __seed16v[3]) 
483 __THROW __nonnull ((1)); 
484extern 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. */ 
490struct 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). */ 
501extern int drand48_r (struct drand48_data *__restrict __buffer, 
502 double *__restrict __result) __THROW __nonnull ((1, 2)); 
503extern 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). */ 
508extern int lrand48_r (struct drand48_data *__restrict __buffer, 
509 long int *__restrict __result) 
510 __THROW __nonnull ((1, 2)); 
511extern 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). */ 
517extern int mrand48_r (struct drand48_data *__restrict __buffer, 
518 long int *__restrict __result) 
519 __THROW __nonnull ((1, 2)); 
520extern 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. */ 
526extern int srand48_r (long int __seedval, struct drand48_data *__buffer) 
527 __THROW __nonnull ((2)); 
528 
529extern int seed48_r (unsigned short int __seed16v[3], 
530 struct drand48_data *__buffer) __THROW __nonnull ((1, 2)); 
531 
532extern 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. */ 
539extern 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. */ 
542extern 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. */ 
550extern void *realloc (void *__ptr, size_t __size) 
551 __THROW __attribute_warn_unused_result__ __attribute_alloc_size__ ((2)); 
552 
553#ifdef __USE_MISC 
554/* Re-allocate the previously allocated block in PTR, making the new 
555 block large enough for NMEMB elements of SIZE bytes each. */ 
556/* __attribute_malloc__ is not used, because if reallocarray returns 
557 the same pointer that was passed to it, aliasing needs to be allowed 
558 between objects pointed by the old and new pointers. */ 
559extern void *reallocarray (void *__ptr, size_t __nmemb, size_t __size) 
560 __THROW __attribute_warn_unused_result__ 
561 __attribute_alloc_size__ ((2, 3)); 
562#endif 
563 
564/* Free a block allocated by `malloc', `realloc' or `calloc'. */ 
565extern void free (void *__ptr) __THROW; 
566 
567#ifdef __USE_MISC 
568# include <alloca.h> 
569#endif /* Use misc. */ 
570 
571#if (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K) \ 
572 || defined __USE_MISC 
573/* Allocate SIZE bytes on a page boundary. The storage cannot be freed. */ 
574extern void *valloc (size_t __size) __THROW __attribute_malloc__ 
575 __attribute_alloc_size__ ((1)) __wur; 
576#endif 
577 
578#ifdef __USE_XOPEN2K 
579/* Allocate memory of SIZE bytes with an alignment of ALIGNMENT. */ 
580extern int posix_memalign (void **__memptr, size_t __alignment, size_t __size) 
581 __THROW __nonnull ((1)) __wur; 
582#endif 
583 
584#ifdef __USE_ISOC11 
585/* ISO C variant of aligned allocation. */ 
586extern void *aligned_alloc (size_t __alignment, size_t __size) 
587 __THROW __attribute_malloc__ __attribute_alloc_size__ ((2)) __wur; 
588#endif 
589 
590/* Abort execution and generate a core-dump. */ 
591extern void abort (void) __THROW __attribute__ ((__noreturn__)); 
592 
593 
594/* Register a function to be called when `exit' is called. */ 
595extern int atexit (void (*__func) (void)) __THROW __nonnull ((1)); 
596 
597#if defined __USE_ISOC11 || defined __USE_ISOCXX11 
598/* Register a function to be called when `quick_exit' is called. */ 
599# ifdef __cplusplus 
600extern "C++" int at_quick_exit (void (*__func) (void)) 
601 __THROW __asm ("at_quick_exit") __nonnull ((1)); 
602# else 
603extern int at_quick_exit (void (*__func) (void)) __THROW __nonnull ((1)); 
604# endif 
605#endif 
606 
607#ifdef __USE_MISC 
608/* Register a function to be called with the status 
609 given to `exit' and the given argument. */ 
610extern int on_exit (void (*__func) (int __status, void *__arg), void *__arg) 
611 __THROW __nonnull ((1)); 
612#endif 
613 
614/* Call all functions registered with `atexit' and `on_exit', 
615 in the reverse of the order in which they were registered, 
616 perform stdio cleanup, and terminate program execution with STATUS. */ 
617extern void exit (int __status) __THROW __attribute__ ((__noreturn__)); 
618 
619#if defined __USE_ISOC11 || defined __USE_ISOCXX11 
620/* Call all functions registered with `at_quick_exit' in the reverse 
621 of the order in which they were registered and terminate program 
622 execution with STATUS. */ 
623extern void quick_exit (int __status) __THROW __attribute__ ((__noreturn__)); 
624#endif 
625 
626#ifdef __USE_ISOC99 
627/* Terminate the program with STATUS without calling any of the 
628 functions registered with `atexit' or `on_exit'. */ 
629extern void _Exit (int __status) __THROW __attribute__ ((__noreturn__)); 
630#endif 
631 
632 
633/* Return the value of envariable NAME, or NULL if it doesn't exist. */ 
634extern char *getenv (const char *__name) __THROW __nonnull ((1)) __wur; 
635 
636#ifdef __USE_GNU 
637/* This function is similar to the above but returns NULL if the 
638 programs is running with SUID or SGID enabled. */ 
639extern char *secure_getenv (const char *__name) 
640 __THROW __nonnull ((1)) __wur; 
641#endif 
642 
643#if defined __USE_MISC || defined __USE_XOPEN 
644/* The SVID says this is in <stdio.h>, but this seems a better place. */ 
645/* Put STRING, which is of the form "NAME=VALUE", in the environment. 
646 If there is no `=', remove NAME from the environment. */ 
647extern int putenv (char *__string) __THROW __nonnull ((1)); 
648#endif 
649 
650#ifdef __USE_XOPEN2K 
651/* Set NAME to VALUE in the environment. 
652 If REPLACE is nonzero, overwrite an existing value. */ 
653extern int setenv (const char *__name, const char *__value, int __replace) 
654 __THROW __nonnull ((2)); 
655 
656/* Remove the variable NAME from the environment. */ 
657extern int unsetenv (const char *__name) __THROW __nonnull ((1)); 
658#endif 
659 
660#ifdef __USE_MISC 
661/* The `clearenv' was planned to be added to POSIX.1 but probably 
662 never made it. Nevertheless the POSIX.9 standard (POSIX bindings 
663 for Fortran 77) requires this function. */ 
664extern int clearenv (void) __THROW; 
665#endif 
666 
667 
668#if defined __USE_MISC \ 
669 || (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K8) 
670/* Generate a unique temporary file name from TEMPLATE. 
671 The last six characters of TEMPLATE must be "XXXXXX"; 
672 they are replaced with a string that makes the file name unique. 
673 Always returns TEMPLATE, it's either a temporary file name or a null 
674 string if it cannot get a unique file name. */ 
675extern char *mktemp (char *__template) __THROW __nonnull ((1)); 
676#endif 
677 
678#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8 
679/* Generate a unique temporary file name from TEMPLATE. 
680 The last six characters of TEMPLATE must be "XXXXXX"; 
681 they are replaced with a string that makes the filename unique. 
682 Returns a file descriptor open on the file for reading and writing, 
683 or -1 if it cannot create a uniquely-named file. 
684 
685 This function is a possible cancellation point and therefore not 
686 marked with __THROW. */ 
687# ifndef __USE_FILE_OFFSET64 
688extern int mkstemp (char *__template) __nonnull ((1)) __wur; 
689# else 
690# ifdef __REDIRECT 
691extern int __REDIRECT (mkstemp, (char *__template), mkstemp64) 
692 __nonnull ((1)) __wur; 
693# else 
694# define mkstemp mkstemp64 
695# endif 
696# endif 
697# ifdef __USE_LARGEFILE64 
698extern int mkstemp64 (char *__template) __nonnull ((1)) __wur; 
699# endif 
700#endif 
701 
702#ifdef __USE_MISC 
703/* Similar to mkstemp, but the template can have a suffix after the 
704 XXXXXX. The length of the suffix is specified in the second 
705 parameter. 
706 
707 This function is a possible cancellation point and therefore not 
708 marked with __THROW. */ 
709# ifndef __USE_FILE_OFFSET64 
710extern int mkstemps (char *__template, int __suffixlen) __nonnull ((1)) __wur; 
711# else 
712# ifdef __REDIRECT 
713extern int __REDIRECT (mkstemps, (char *__template, int __suffixlen), 
714 mkstemps64) __nonnull ((1)) __wur; 
715# else 
716# define mkstemps mkstemps64 
717# endif 
718# endif 
719# ifdef __USE_LARGEFILE64 
720extern int mkstemps64 (char *__template, int __suffixlen) 
721 __nonnull ((1)) __wur; 
722# endif 
723#endif 
724 
725#ifdef __USE_XOPEN2K8 
726/* Create a unique temporary directory from TEMPLATE. 
727 The last six characters of TEMPLATE must be "XXXXXX"; 
728 they are replaced with a string that makes the directory name unique. 
729 Returns TEMPLATE, or a null pointer if it cannot get a unique name. 
730 The directory is created mode 700. */ 
731extern char *mkdtemp (char *__template) __THROW __nonnull ((1)) __wur; 
732#endif 
733 
734#ifdef __USE_GNU 
735/* Generate a unique temporary file name from TEMPLATE similar to 
736 mkstemp. But allow the caller to pass additional flags which are 
737 used in the open call to create the file.. 
738 
739 This function is a possible cancellation point and therefore not 
740 marked with __THROW. */ 
741# ifndef __USE_FILE_OFFSET64 
742extern int mkostemp (char *__template, int __flags) __nonnull ((1)) __wur; 
743# else 
744# ifdef __REDIRECT 
745extern int __REDIRECT (mkostemp, (char *__template, int __flags), mkostemp64) 
746 __nonnull ((1)) __wur; 
747# else 
748# define mkostemp mkostemp64 
749# endif 
750# endif 
751# ifdef __USE_LARGEFILE64 
752extern int mkostemp64 (char *__template, int __flags) __nonnull ((1)) __wur; 
753# endif 
754 
755/* Similar to mkostemp, but the template can have a suffix after the 
756 XXXXXX. The length of the suffix is specified in the second 
757 parameter. 
758 
759 This function is a possible cancellation point and therefore not 
760 marked with __THROW. */ 
761# ifndef __USE_FILE_OFFSET64 
762extern int mkostemps (char *__template, int __suffixlen, int __flags) 
763 __nonnull ((1)) __wur; 
764# else 
765# ifdef __REDIRECT 
766extern int __REDIRECT (mkostemps, (char *__template, int __suffixlen, 
767 int __flags), mkostemps64) 
768 __nonnull ((1)) __wur; 
769# else 
770# define mkostemps mkostemps64 
771# endif 
772# endif 
773# ifdef __USE_LARGEFILE64 
774extern int mkostemps64 (char *__template, int __suffixlen, int __flags) 
775 __nonnull ((1)) __wur; 
776# endif 
777#endif 
778 
779 
780/* Execute the given line as a shell command. 
781 
782 This function is a cancellation point and therefore not marked with 
783 __THROW. */ 
784extern int system (const char *__command) __wur; 
785 
786 
787#ifdef __USE_GNU 
788/* Return a malloc'd string containing the canonical absolute name of the 
789 existing named file. */ 
790extern char *canonicalize_file_name (const char *__name) 
791 __THROW __nonnull ((1)) __wur; 
792#endif 
793 
794#if defined __USE_MISC || defined __USE_XOPEN_EXTENDED 
795/* Return the canonical absolute name of file NAME. If RESOLVED is 
796 null, the result is malloc'd; otherwise, if the canonical name is 
797 PATH_MAX chars or more, returns null with `errno' set to 
798 ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars, 
799 returns the name in RESOLVED. */ 
800extern char *realpath (const char *__restrict __name, 
801 char *__restrict __resolved) __THROW __wur; 
802#endif 
803 
804 
805/* Shorthand for type of comparison functions. */ 
806#ifndef __COMPAR_FN_T 
807# define __COMPAR_FN_T 
808typedef int (*__compar_fn_t) (const void *, const void *); 
809 
810# ifdef __USE_GNU 
811typedef __compar_fn_t comparison_fn_t; 
812# endif 
813#endif 
814#ifdef __USE_GNU 
815typedef int (*__compar_d_fn_t) (const void *, const void *, void *); 
816#endif 
817 
818/* Do a binary search for KEY in BASE, which consists of NMEMB elements 
819 of SIZE bytes each, using COMPAR to perform the comparisons. */ 
820extern void *bsearch (const void *__key, const void *__base, 
821 size_t __nmemb, size_t __size, __compar_fn_t __compar) 
822 __nonnull ((1, 2, 5)) __wur; 
823 
824#ifdef __USE_EXTERN_INLINES 
825# include <bits/stdlib-bsearch.h> 
826#endif 
827 
828/* Sort NMEMB elements of BASE, of SIZE bytes each, 
829 using COMPAR to perform the comparisons. */ 
830extern void qsort (void *__base, size_t __nmemb, size_t __size, 
831 __compar_fn_t __compar) __nonnull ((1, 4)); 
832#ifdef __USE_GNU 
833extern void qsort_r (void *__base, size_t __nmemb, size_t __size, 
834 __compar_d_fn_t __compar, void *__arg) 
835 __nonnull ((1, 4)); 
836#endif 
837 
838 
839/* Return the absolute value of X. */ 
840extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur; 
841extern long int labs (long int __x) __THROW __attribute__ ((__const__)) __wur; 
842 
843#ifdef __USE_ISOC99 
844__extension__ extern long long int llabs (long long int __x) 
845 __THROW __attribute__ ((__const__)) __wur; 
846#endif 
847 
848 
849/* Return the `div_t', `ldiv_t' or `lldiv_t' representation 
850 of the value of NUMER over DENOM. */ 
851/* GCC may have built-ins for these someday. */ 
852extern div_t div (int __numer, int __denom) 
853 __THROW __attribute__ ((__const__)) __wur; 
854extern ldiv_t ldiv (long int __numer, long int __denom) 
855 __THROW __attribute__ ((__const__)) __wur; 
856 
857#ifdef __USE_ISOC99 
858__extension__ extern lldiv_t lldiv (long long int __numer, 
859 long long int __denom) 
860 __THROW __attribute__ ((__const__)) __wur; 
861#endif 
862 
863 
864#if (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K8) \ 
865 || defined __USE_MISC 
866/* Convert floating point numbers to strings. The returned values are 
867 valid only until another call to the same function. */ 
868 
869/* Convert VALUE to a string with NDIGIT digits and return a pointer to 
870 this. Set *DECPT with the position of the decimal character and *SIGN 
871 with the sign of the number. */ 
872extern char *ecvt (double __value, int __ndigit, int *__restrict __decpt, 
873 int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur; 
874 
875/* Convert VALUE to a string rounded to NDIGIT decimal digits. Set *DECPT 
876 with the position of the decimal character and *SIGN with the sign of 
877 the number. */ 
878extern char *fcvt (double __value, int __ndigit, int *__restrict __decpt, 
879 int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur; 
880 
881/* If possible convert VALUE to a string with NDIGIT significant digits. 
882 Otherwise use exponential representation. The resulting string will 
883 be written to BUF. */ 
884extern char *gcvt (double __value, int __ndigit, char *__buf) 
885 __THROW __nonnull ((3)) __wur; 
886#endif 
887 
888#ifdef __USE_MISC 
889/* Long double versions of above functions. */ 
890extern char *qecvt (long double __value, int __ndigit, 
891 int *__restrict __decpt, int *__restrict __sign) 
892 __THROW __nonnull ((3, 4)) __wur; 
893extern char *qfcvt (long double __value, int __ndigit, 
894 int *__restrict __decpt, int *__restrict __sign) 
895 __THROW __nonnull ((3, 4)) __wur; 
896extern char *qgcvt (long double __value, int __ndigit, char *__buf) 
897 __THROW __nonnull ((3)) __wur; 
898 
899 
900/* Reentrant version of the functions above which provide their own 
901 buffers. */ 
902extern int ecvt_r (double __value, int __ndigit, int *__restrict __decpt, 
903 int *__restrict __sign, char *__restrict __buf, 
904 size_t __len) __THROW __nonnull ((3, 4, 5)); 
905extern int fcvt_r (double __value, int __ndigit, int *__restrict __decpt, 
906 int *__restrict __sign, char *__restrict __buf, 
907 size_t __len) __THROW __nonnull ((3, 4, 5)); 
908 
909extern int qecvt_r (long double __value, int __ndigit, 
910 int *__restrict __decpt, int *__restrict __sign, 
911 char *__restrict __buf, size_t __len) 
912 __THROW __nonnull ((3, 4, 5)); 
913extern int qfcvt_r (long double __value, int __ndigit, 
914 int *__restrict __decpt, int *__restrict __sign, 
915 char *__restrict __buf, size_t __len) 
916 __THROW __nonnull ((3, 4, 5)); 
917#endif /* misc */ 
918 
919 
920/* Return the length of the multibyte character 
921 in S, which is no longer than N. */ 
922extern int mblen (const char *__s, size_t __n) __THROW; 
923/* Return the length of the given multibyte character, 
924 putting its `wchar_t' representation in *PWC. */ 
925extern int mbtowc (wchar_t *__restrict __pwc, 
926 const char *__restrict __s, size_t __n) __THROW; 
927/* Put the multibyte character represented 
928 by WCHAR in S, returning its length. */ 
929extern int wctomb (char *__s, wchar_t __wchar) __THROW; 
930 
931 
932/* Convert a multibyte string to a wide char string. */ 
933extern size_t mbstowcs (wchar_t *__restrict __pwcs, 
934 const char *__restrict __s, size_t __n) __THROW; 
935/* Convert a wide char string to multibyte string. */ 
936extern size_t wcstombs (char *__restrict __s, 
937 const wchar_t *__restrict __pwcs, size_t __n) 
938 __THROW; 
939 
940 
941#ifdef __USE_MISC 
942/* Determine whether the string value of RESPONSE matches the affirmation 
943 or negative response expression as specified by the LC_MESSAGES category 
944 in the program's current locale. Returns 1 if affirmative, 0 if 
945 negative, and -1 if not matching. */ 
946extern int rpmatch (const char *__response) __THROW __nonnull ((1)) __wur; 
947#endif 
948 
949 
950#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8 
951/* Parse comma separated suboption from *OPTIONP and match against 
952 strings in TOKENS. If found return index and set *VALUEP to 
953 optional value introduced by an equal sign. If the suboption is 
954 not part of TOKENS return in *VALUEP beginning of unknown 
955 suboption. On exit *OPTIONP is set to the beginning of the next 
956 token or at the terminating NUL character. */ 
957extern int getsubopt (char **__restrict __optionp, 
958 char *const *__restrict __tokens, 
959 char **__restrict __valuep) 
960 __THROW __nonnull ((1, 2, 3)) __wur; 
961#endif 
962 
963 
964/* X/Open pseudo terminal handling. */ 
965 
966#ifdef __USE_XOPEN2KXSI 
967/* Return a master pseudo-terminal handle. */ 
968extern int posix_openpt (int __oflag) __wur; 
969#endif 
970 
971#ifdef __USE_XOPEN_EXTENDED 
972/* The next four functions all take a master pseudo-tty fd and 
973 perform an operation on the associated slave: */ 
974 
975/* Chown the slave to the calling user. */ 
976extern int grantpt (int __fd) __THROW; 
977 
978/* Release an internal lock so the slave can be opened. 
979 Call after grantpt(). */ 
980extern int unlockpt (int __fd) __THROW; 
981 
982/* Return the pathname of the pseudo terminal slave associated with 
983 the master FD is open on, or NULL on errors. 
984 The returned storage is good until the next call to this function. */ 
985extern char *ptsname (int __fd) __THROW __wur; 
986#endif 
987 
988#ifdef __USE_GNU 
989/* Store at most BUFLEN characters of the pathname of the slave pseudo 
990 terminal associated with the master FD is open on in BUF. 
991 Return 0 on success, otherwise an error number. */ 
992extern int ptsname_r (int __fd, char *__buf, size_t __buflen) 
993 __THROW __nonnull ((2)); 
994 
995/* Open a master pseudo terminal and return its file descriptor. */ 
996extern int getpt (void); 
997#endif 
998 
999#ifdef __USE_MISC 
1000/* Put the 1 minute, 5 minute and 15 minute load averages into the first 
1001 NELEM elements of LOADAVG. Return the number written (never more than 
1002 three, but may be less than NELEM), or -1 if an error occurred. */ 
1003extern int getloadavg (double __loadavg[], int __nelem) 
1004 __THROW __nonnull ((1)); 
1005#endif 
1006 
1007#if defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K 
1008/* Return the index into the active-logins file (utmp) for 
1009 the controlling terminal. */ 
1010extern int ttyslot (void) __THROW; 
1011#endif 
1012 
1013#include <bits/stdlib-float.h> 
1014 
1015/* Define some macros helping to catch buffer overflows. */ 
1016#if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function 
1017# include <bits/stdlib.h> 
1018#endif 
1019#ifdef __LDBL_COMPAT 
1020# include <bits/stdlib-ldbl.h> 
1021#endif 
1022 
1023__END_DECLS 
1024 
1025#endif /* stdlib.h */ 
1026