1/* Copyright (C) 1991-2015 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
17
18/*
19 * ISO C99 Standard: 7.20 General utilities <stdlib.h>
20 */
21
22#ifndef _STDLIB_H
23
24#include <features.h>
25
26/* Get size_t, wchar_t and NULL from <stddef.h>. */
27#define __need_size_t
28#ifndef __need_malloc_and_calloc
29# define __need_wchar_t
30# define __need_NULL
31#endif
32#include <stddef.h>
33
34__BEGIN_DECLS
35
36#ifndef __need_malloc_and_calloc
37#define _STDLIB_H 1
38
39#if (defined __USE_XOPEN || defined __USE_XOPEN2K8) && !defined _SYS_WAIT_H
40/* XPG requires a few symbols from <sys/wait.h> being defined. */
41# include <bits/waitflags.h>
42# include <bits/waitstatus.h>
43
44# ifdef __USE_MISC
45
46/* Lots of hair to allow traditional BSD use of `union wait'
47 as well as POSIX.1 use of `int' for the status word. */
48
49# if defined __GNUC__ && !defined __cplusplus
50# define __WAIT_INT(status) \
51 (__extension__ (((union { __typeof(status) __in; int __i; }) \
52 { .__in = (status) }).__i))
53# else
54# define __WAIT_INT(status) (*(int *) &(status))
55# endif
56
57/* This is the type of the argument to `wait'. The funky union
58 causes redeclarations with either `int *' or `union wait *' to be
59 allowed without complaint. __WAIT_STATUS_DEFN is the type used in
60 the actual function definitions. */
61
62# if !defined __GNUC__ || __GNUC__ < 2 || defined __cplusplus
63# define __WAIT_STATUS void *
64# define __WAIT_STATUS_DEFN void *
65# else
66/* This works in GCC 2.6.1 and later. */
67typedef union
68 {
69 union wait *__uptr;
70 int *__iptr;
71 } __WAIT_STATUS __attribute__ ((__transparent_union__));
72# define __WAIT_STATUS_DEFN int *
73# endif
74
75# else /* Don't use misc. */
76
77# define __WAIT_INT(status) (status)
78# define __WAIT_STATUS int *
79# define __WAIT_STATUS_DEFN int *
80
81# endif /* Use misc. */
82
83/* Define the macros <sys/wait.h> also would define this way. */
84# define WEXITSTATUS(status) __WEXITSTATUS (__WAIT_INT (status))
85# define WTERMSIG(status) __WTERMSIG (__WAIT_INT (status))
86# define WSTOPSIG(status) __WSTOPSIG (__WAIT_INT (status))
87# define WIFEXITED(status) __WIFEXITED (__WAIT_INT (status))
88# define WIFSIGNALED(status) __WIFSIGNALED (__WAIT_INT (status))
89# define WIFSTOPPED(status) __WIFSTOPPED (__WAIT_INT (status))
90# ifdef __WIFCONTINUED
91# define WIFCONTINUED(status) __WIFCONTINUED (__WAIT_INT (status))
92# endif
93#endif /* X/Open or XPG7 and <sys/wait.h> not included. */
94
95__BEGIN_NAMESPACE_STD
96/* Returned by `div'. */
97typedef struct
98 {
99 int quot; /* Quotient. */
100 int rem; /* Remainder. */
101 } div_t;
102
103/* Returned by `ldiv'. */
104#ifndef __ldiv_t_defined
105typedef struct
106 {
107 long int quot; /* Quotient. */
108 long int rem; /* Remainder. */
109 } ldiv_t;
110# define __ldiv_t_defined 1
111#endif
112__END_NAMESPACE_STD
113
114#if defined __USE_ISOC99 && !defined __lldiv_t_defined
115__BEGIN_NAMESPACE_C99
116/* Returned by `lldiv'. */
117__extension__ typedef struct
118 {
119 long long int quot; /* Quotient. */
120 long long int rem; /* Remainder. */
121 } lldiv_t;
122# define __lldiv_t_defined 1
123__END_NAMESPACE_C99
124#endif
125
126
127/* The largest number rand will return (same as INT_MAX). */
128#define RAND_MAX 2147483647
129
130
131/* We define these the same for all machines.
132 Changes from this to the outside world should be done in `_exit'. */
133#define EXIT_FAILURE 1 /* Failing exit status. */
134#define EXIT_SUCCESS 0 /* Successful exit status. */
135
136
137/* Maximum length of a multibyte character in the current locale. */
138#define MB_CUR_MAX (__ctype_get_mb_cur_max ())
139extern size_t __ctype_get_mb_cur_max (void) __THROW __wur;
140
141
142__BEGIN_NAMESPACE_STD
143/* Convert a string to a floating-point number. */
144extern double atof (const char *__nptr)
145 __THROW __attribute_pure__ __nonnull ((1)) __wur;
146/* Convert a string to an integer. */
147extern int atoi (const char *__nptr)
148 __THROW __attribute_pure__ __nonnull ((1)) __wur;
149/* Convert a string to a long integer. */
150extern long int atol (const char *__nptr)
151 __THROW __attribute_pure__ __nonnull ((1)) __wur;
152__END_NAMESPACE_STD
153
154#ifdef __USE_ISOC99
155__BEGIN_NAMESPACE_C99
156/* Convert a string to a long long integer. */
157__extension__ extern long long int atoll (const char *__nptr)
158 __THROW __attribute_pure__ __nonnull ((1)) __wur;
159__END_NAMESPACE_C99
160#endif
161
162__BEGIN_NAMESPACE_STD
163/* Convert a string to a floating-point number. */
164extern double strtod (const char *__restrict __nptr,
165 char **__restrict __endptr)
166 __THROW __nonnull ((1));
167__END_NAMESPACE_STD
168
169#ifdef __USE_ISOC99
170__BEGIN_NAMESPACE_C99
171/* Likewise for `float' and `long double' sizes of floating-point numbers. */
172extern float strtof (const char *__restrict __nptr,
173 char **__restrict __endptr) __THROW __nonnull ((1));
174
175extern long double strtold (const char *__restrict __nptr,
176 char **__restrict __endptr)
177 __THROW __nonnull ((1));
178__END_NAMESPACE_C99
179#endif
180
181__BEGIN_NAMESPACE_STD
182/* Convert a string to a long integer. */
183extern long int strtol (const char *__restrict __nptr,
184 char **__restrict __endptr, int __base)
185 __THROW __nonnull ((1));
186/* Convert a string to an unsigned long integer. */
187extern unsigned long int strtoul (const char *__restrict __nptr,
188 char **__restrict __endptr, int __base)
189 __THROW __nonnull ((1));
190__END_NAMESPACE_STD
191
192#ifdef __USE_MISC
193/* Convert a string to a quadword integer. */
194__extension__
195extern long long int strtoq (const char *__restrict __nptr,
196 char **__restrict __endptr, int __base)
197 __THROW __nonnull ((1));
198/* Convert a string to an unsigned quadword integer. */
199__extension__
200extern unsigned long long int strtouq (const char *__restrict __nptr,
201 char **__restrict __endptr, int __base)
202 __THROW __nonnull ((1));
203#endif /* Use misc. */
204
205#ifdef __USE_ISOC99
206__BEGIN_NAMESPACE_C99
207/* Convert a string to a quadword integer. */
208__extension__
209extern long long int strtoll (const char *__restrict __nptr,
210 char **__restrict __endptr, int __base)
211 __THROW __nonnull ((1));
212/* Convert a string to an unsigned quadword integer. */
213__extension__
214extern unsigned long long int strtoull (const char *__restrict __nptr,
215 char **__restrict __endptr, int __base)
216 __THROW __nonnull ((1));
217__END_NAMESPACE_C99
218#endif /* ISO C99 or use MISC. */
219
220
221#ifdef __USE_GNU
222/* The concept of one static locale per category is not very well
223 thought out. Many applications will need to process its data using
224 information from several different locales. Another problem is
225 the implementation of the internationalization handling in the
226 ISO C++ standard library. To support this another set of
227 the functions using locale data exist which take an additional
228 argument.
229
230 Attention: even though several *_l interfaces are part of POSIX:2008,
231 these are not. */
232
233/* Structure for reentrant locale using functions. This is an
234 (almost) opaque type for the user level programs. */
235# include <xlocale.h>
236
237/* Special versions of the functions above which take the locale to
238 use as an additional parameter. */
239extern long int strtol_l (const char *__restrict __nptr,
240 char **__restrict __endptr, int __base,
241 __locale_t __loc) __THROW __nonnull ((1, 4));
242
243extern unsigned long int strtoul_l (const char *__restrict __nptr,
244 char **__restrict __endptr,
245 int __base, __locale_t __loc)
246 __THROW __nonnull ((1, 4));
247
248__extension__
249extern long long int strtoll_l (const char *__restrict __nptr,
250 char **__restrict __endptr, int __base,
251 __locale_t __loc)
252 __THROW __nonnull ((1, 4));
253
254__extension__
255extern unsigned long long int strtoull_l (const char *__restrict __nptr,
256 char **__restrict __endptr,
257 int __base, __locale_t __loc)
258 __THROW __nonnull ((1, 4));
259
260extern double strtod_l (const char *__restrict __nptr,
261 char **__restrict __endptr, __locale_t __loc)
262 __THROW __nonnull ((1, 3));
263
264extern float strtof_l (const char *__restrict __nptr,
265 char **__restrict __endptr, __locale_t __loc)
266 __THROW __nonnull ((1, 3));
267
268extern long double strtold_l (const char *__restrict __nptr,
269 char **__restrict __endptr,
270 __locale_t __loc)
271 __THROW __nonnull ((1, 3));
272#endif /* GNU */
273
274
275#ifdef __USE_EXTERN_INLINES
276__BEGIN_NAMESPACE_STD
277__extern_inline int
278__NTH (atoi (const char *__nptr))
279{
280 return (int) strtol (__nptr, (char **) NULL, 10);
281}
282__extern_inline long int
283__NTH (atol (const char *__nptr))
284{
285 return strtol (__nptr, (char **) NULL, 10);
286}
287__END_NAMESPACE_STD
288
289# ifdef __USE_ISOC99
290__BEGIN_NAMESPACE_C99
291__extension__ __extern_inline long long int
292__NTH (atoll (const char *__nptr))
293{
294 return strtoll (__nptr, (char **) NULL, 10);
295}
296__END_NAMESPACE_C99
297# endif
298#endif /* Optimizing and Inlining. */
299
300
301#if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
302/* Convert N to base 64 using the digits "./0-9A-Za-z", least-significant
303 digit first. Returns a pointer to static storage overwritten by the
304 next call. */
305extern char *l64a (long int __n) __THROW __wur;
306
307/* Read a number from a string S in base 64 as above. */
308extern long int a64l (const char *__s)
309 __THROW __attribute_pure__ __nonnull ((1)) __wur;
310
311#endif /* Use misc || extended X/Open. */
312
313#if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
314# include <sys/types.h> /* we need int32_t... */
315
316/* These are the functions that actually do things. The `random', `srandom',
317 `initstate' and `setstate' functions are those from BSD Unices.
318 The `rand' and `srand' functions are required by the ANSI standard.
319 We provide both interfaces to the same random number generator. */
320/* Return a random long integer between 0 and RAND_MAX inclusive. */
321extern long int random (void) __THROW;
322
323/* Seed the random number generator with the given number. */
324extern void srandom (unsigned int __seed) __THROW;
325
326/* Initialize the random number generator to use state buffer STATEBUF,
327 of length STATELEN, and seed it with SEED. Optimal lengths are 8, 16,
328 32, 64, 128 and 256, the bigger the better; values less than 8 will
329 cause an error and values greater than 256 will be rounded down. */
330extern char *initstate (unsigned int __seed, char *__statebuf,
331 size_t __statelen) __THROW __nonnull ((2));
332
333/* Switch the random number generator to state buffer STATEBUF,
334 which should have been previously initialized by `initstate'. */
335extern char *setstate (char *__statebuf) __THROW __nonnull ((1));
336
337
338# ifdef __USE_MISC
339/* Reentrant versions of the `random' family of functions.
340 These functions all use the following data structure to contain
341 state, rather than global state variables. */
342
343struct random_data
344 {
345 int32_t *fptr; /* Front pointer. */
346 int32_t *rptr; /* Rear pointer. */
347 int32_t *state; /* Array of state values. */
348 int rand_type; /* Type of random number generator. */
349 int rand_deg; /* Degree of random number generator. */
350 int rand_sep; /* Distance between front and rear. */
351 int32_t *end_ptr; /* Pointer behind state table. */
352 };
353
354extern int random_r (struct random_data *__restrict __buf,
355 int32_t *__restrict __result) __THROW __nonnull ((1, 2));
356
357extern int srandom_r (unsigned int __seed, struct random_data *__buf)
358 __THROW __nonnull ((2));
359
360extern int initstate_r (unsigned int __seed, char *__restrict __statebuf,
361 size_t __statelen,
362 struct random_data *__restrict __buf)
363 __THROW __nonnull ((2, 4));
364
365extern int setstate_r (char *__restrict __statebuf,
366 struct random_data *__restrict __buf)
367 __THROW __nonnull ((1, 2));
368# endif /* Use misc. */
369#endif /* Use extended X/Open || misc. */
370
371
372__BEGIN_NAMESPACE_STD
373/* Return a random integer between 0 and RAND_MAX inclusive. */
374extern int rand (void) __THROW;
375/* Seed the random number generator with the given number. */
376extern void srand (unsigned int __seed) __THROW;
377__END_NAMESPACE_STD
378
379#ifdef __USE_POSIX
380/* Reentrant interface according to POSIX.1. */
381extern int rand_r (unsigned int *__seed) __THROW;
382#endif
383
384
385#if defined __USE_MISC || defined __USE_XOPEN
386/* System V style 48-bit random number generator functions. */
387
388/* Return non-negative, double-precision floating-point value in [0.0,1.0). */
389extern double drand48 (void) __THROW;
390extern double erand48 (unsigned short int __xsubi[3]) __THROW __nonnull ((1));
391
392/* Return non-negative, long integer in [0,2^31). */
393extern long int lrand48 (void) __THROW;
394extern long int nrand48 (unsigned short int __xsubi[3])
395 __THROW __nonnull ((1));
396
397/* Return signed, long integers in [-2^31,2^31). */
398extern long int mrand48 (void) __THROW;
399extern long int jrand48 (unsigned short int __xsubi[3])
400 __THROW __nonnull ((1));
401
402/* Seed random number generator. */
403extern void srand48 (long int __seedval) __THROW;
404extern unsigned short int *seed48 (unsigned short int __seed16v[3])
405 __THROW __nonnull ((1));
406extern void lcong48 (unsigned short int __param[7]) __THROW __nonnull ((1));
407
408# ifdef __USE_MISC
409/* Data structure for communication with thread safe versions. This
410 type is to be regarded as opaque. It's only exported because users
411 have to allocate objects of this type. */
412struct drand48_data
413 {
414 unsigned short int __x[3]; /* Current state. */
415 unsigned short int __old_x[3]; /* Old state. */
416 unsigned short int __c; /* Additive const. in congruential formula. */
417 unsigned short int __init; /* Flag for initializing. */
418 __extension__ unsigned long long int __a; /* Factor in congruential
419 formula. */
420 };
421
422/* Return non-negative, double-precision floating-point value in [0.0,1.0). */
423extern int drand48_r (struct drand48_data *__restrict __buffer,
424 double *__restrict __result) __THROW __nonnull ((1, 2));
425extern int erand48_r (unsigned short int __xsubi[3],
426 struct drand48_data *__restrict __buffer,
427 double *__restrict __result) __THROW __nonnull ((1, 2));
428
429/* Return non-negative, long integer in [0,2^31). */
430extern int lrand48_r (struct drand48_data *__restrict __buffer,
431 long int *__restrict __result)
432 __THROW __nonnull ((1, 2));
433extern int nrand48_r (unsigned short int __xsubi[3],
434 struct drand48_data *__restrict __buffer,
435 long int *__restrict __result)
436 __THROW __nonnull ((1, 2));
437
438/* Return signed, long integers in [-2^31,2^31). */
439extern int mrand48_r (struct drand48_data *__restrict __buffer,
440 long int *__restrict __result)
441 __THROW __nonnull ((1, 2));
442extern int jrand48_r (unsigned short int __xsubi[3],
443 struct drand48_data *__restrict __buffer,
444 long int *__restrict __result)
445 __THROW __nonnull ((1, 2));
446
447/* Seed random number generator. */
448extern int srand48_r (long int __seedval, struct drand48_data *__buffer)
449 __THROW __nonnull ((2));
450
451extern int seed48_r (unsigned short int __seed16v[3],
452 struct drand48_data *__buffer) __THROW __nonnull ((1, 2));
453
454extern int lcong48_r (unsigned short int __param[7],
455 struct drand48_data *__buffer)
456 __THROW __nonnull ((1, 2));
457# endif /* Use misc. */
458#endif /* Use misc or X/Open. */
459
460#endif /* don't just need malloc and calloc */
461
462#ifndef __malloc_and_calloc_defined
463# define __malloc_and_calloc_defined
464__BEGIN_NAMESPACE_STD
465/* Allocate SIZE bytes of memory. */
466extern void *malloc (size_t __size) __THROW __attribute_malloc__ __wur;
467/* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */
468extern void *calloc (size_t __nmemb, size_t __size)
469 __THROW __attribute_malloc__ __wur;
470__END_NAMESPACE_STD
471#endif
472
473#ifndef __need_malloc_and_calloc
474__BEGIN_NAMESPACE_STD
475/* Re-allocate the previously allocated block
476 in PTR, making the new block SIZE bytes long. */
477/* __attribute_malloc__ is not used, because if realloc returns
478 the same pointer that was passed to it, aliasing needs to be allowed
479 between objects pointed by the old and new pointers. */
480extern void *realloc (void *__ptr, size_t __size)
481 __THROW __attribute_warn_unused_result__;
482/* Free a block allocated by `malloc', `realloc' or `calloc'. */
483extern void free (void *__ptr) __THROW;
484__END_NAMESPACE_STD
485
486#ifdef __USE_MISC
487/* Free a block. An alias for `free'. (Sun Unices). */
488extern void cfree (void *__ptr) __THROW;
489#endif /* Use misc. */
490
491#ifdef __USE_MISC
492# include <alloca.h>
493#endif /* Use misc. */
494
495#if (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K) \
496 || defined __USE_MISC
497/* Allocate SIZE bytes on a page boundary. The storage cannot be freed. */
498extern void *valloc (size_t __size) __THROW __attribute_malloc__ __wur;
499#endif
500
501#ifdef __USE_XOPEN2K
502/* Allocate memory of SIZE bytes with an alignment of ALIGNMENT. */
503extern int posix_memalign (void **__memptr, size_t __alignment, size_t __size)
504 __THROW __nonnull ((1)) __wur;
505#endif
506
507#ifdef __USE_ISOC11
508/* ISO C variant of aligned allocation. */
509extern void *aligned_alloc (size_t __alignment, size_t __size)
510 __THROW __attribute_malloc__ __attribute_alloc_size__ ((2)) __wur;
511#endif
512
513__BEGIN_NAMESPACE_STD
514/* Abort execution and generate a core-dump. */
515extern void abort (void) __THROW __attribute__ ((__noreturn__));
516
517
518/* Register a function to be called when `exit' is called. */
519extern int atexit (void (*__func) (void)) __THROW __nonnull ((1));
520
521#if defined __USE_ISOC11 || defined __USE_ISOCXX11
522/* Register a function to be called when `quick_exit' is called. */
523# ifdef __cplusplus
524extern "C++" int at_quick_exit (void (*__func) (void))
525 __THROW __asm ("at_quick_exit") __nonnull ((1));
526# else
527extern int at_quick_exit (void (*__func) (void)) __THROW __nonnull ((1));
528# endif
529#endif
530__END_NAMESPACE_STD
531
532#ifdef __USE_MISC
533/* Register a function to be called with the status
534 given to `exit' and the given argument. */
535extern int on_exit (void (*__func) (int __status, void *__arg), void *__arg)
536 __THROW __nonnull ((1));
537#endif
538
539__BEGIN_NAMESPACE_STD
540/* Call all functions registered with `atexit' and `on_exit',
541 in the reverse of the order in which they were registered,
542 perform stdio cleanup, and terminate program execution with STATUS. */
543extern void exit (int __status) __THROW __attribute__ ((__noreturn__));
544
545#if defined __USE_ISOC11 || defined __USE_ISOCXX11
546/* Call all functions registered with `at_quick_exit' in the reverse
547 of the order in which they were registered and terminate program
548 execution with STATUS. */
549extern void quick_exit (int __status) __THROW __attribute__ ((__noreturn__));
550#endif
551__END_NAMESPACE_STD
552
553#ifdef __USE_ISOC99
554__BEGIN_NAMESPACE_C99
555/* Terminate the program with STATUS without calling any of the
556 functions registered with `atexit' or `on_exit'. */
557extern void _Exit (int __status) __THROW __attribute__ ((__noreturn__));
558__END_NAMESPACE_C99
559#endif
560
561
562__BEGIN_NAMESPACE_STD
563/* Return the value of envariable NAME, or NULL if it doesn't exist. */
564extern char *getenv (const char *__name) __THROW __nonnull ((1)) __wur;
565__END_NAMESPACE_STD
566
567#ifdef __USE_GNU
568/* This function is similar to the above but returns NULL if the
569 programs is running with SUID or SGID enabled. */
570extern char *secure_getenv (const char *__name)
571 __THROW __nonnull ((1)) __wur;
572#endif
573
574#if defined __USE_MISC || defined __USE_XOPEN
575/* The SVID says this is in <stdio.h>, but this seems a better place. */
576/* Put STRING, which is of the form "NAME=VALUE", in the environment.
577 If there is no `=', remove NAME from the environment. */
578extern int putenv (char *__string) __THROW __nonnull ((1));
579#endif
580
581#ifdef __USE_XOPEN2K
582/* Set NAME to VALUE in the environment.
583 If REPLACE is nonzero, overwrite an existing value. */
584extern int setenv (const char *__name, const char *__value, int __replace)
585 __THROW __nonnull ((2));
586
587/* Remove the variable NAME from the environment. */
588extern int unsetenv (const char *__name) __THROW __nonnull ((1));
589#endif
590
591#ifdef __USE_MISC
592/* The `clearenv' was planned to be added to POSIX.1 but probably
593 never made it. Nevertheless the POSIX.9 standard (POSIX bindings
594 for Fortran 77) requires this function. */
595extern int clearenv (void) __THROW;
596#endif
597
598
599#if defined __USE_MISC \
600 || (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K8)
601/* Generate a unique temporary file name from TEMPLATE.
602 The last six characters of TEMPLATE must be "XXXXXX";
603 they are replaced with a string that makes the file name unique.
604 Always returns TEMPLATE, it's either a temporary file name or a null
605 string if it cannot get a unique file name. */
606extern char *mktemp (char *__template) __THROW __nonnull ((1));
607#endif
608
609#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
610/* Generate a unique temporary file name from TEMPLATE.
611 The last six characters of TEMPLATE must be "XXXXXX";
612 they are replaced with a string that makes the filename unique.
613 Returns a file descriptor open on the file for reading and writing,
614 or -1 if it cannot create a uniquely-named file.
615
616 This function is a possible cancellation point and therefore not
617 marked with __THROW. */
618# ifndef __USE_FILE_OFFSET64
619extern int mkstemp (char *__template) __nonnull ((1)) __wur;
620# else
621# ifdef __REDIRECT
622extern int __REDIRECT (mkstemp, (char *__template), mkstemp64)
623 __nonnull ((1)) __wur;
624# else
625# define mkstemp mkstemp64
626# endif
627# endif
628# ifdef __USE_LARGEFILE64
629extern int mkstemp64 (char *__template) __nonnull ((1)) __wur;
630# endif
631#endif
632
633#ifdef __USE_MISC
634/* Similar to mkstemp, but the template can have a suffix after the
635 XXXXXX. The length of the suffix is specified in the second
636 parameter.
637
638 This function is a possible cancellation point and therefore not
639 marked with __THROW. */
640# ifndef __USE_FILE_OFFSET64
641extern int mkstemps (char *__template, int __suffixlen) __nonnull ((1)) __wur;
642# else
643# ifdef __REDIRECT
644extern int __REDIRECT (mkstemps, (char *__template, int __suffixlen),
645 mkstemps64) __nonnull ((1)) __wur;
646# else
647# define mkstemps mkstemps64
648# endif
649# endif
650# ifdef __USE_LARGEFILE64
651extern int mkstemps64 (char *__template, int __suffixlen)
652 __nonnull ((1)) __wur;
653# endif
654#endif
655
656#ifdef __USE_XOPEN2K8
657/* Create a unique temporary directory from TEMPLATE.
658 The last six characters of TEMPLATE must be "XXXXXX";
659 they are replaced with a string that makes the directory name unique.
660 Returns TEMPLATE, or a null pointer if it cannot get a unique name.
661 The directory is created mode 700. */
662extern char *mkdtemp (char *__template) __THROW __nonnull ((1)) __wur;
663#endif
664
665#ifdef __USE_GNU
666/* Generate a unique temporary file name from TEMPLATE similar to
667 mkstemp. But allow the caller to pass additional flags which are
668 used in the open call to create the file..
669
670 This function is a possible cancellation point and therefore not
671 marked with __THROW. */
672# ifndef __USE_FILE_OFFSET64
673extern int mkostemp (char *__template, int __flags) __nonnull ((1)) __wur;
674# else
675# ifdef __REDIRECT
676extern int __REDIRECT (mkostemp, (char *__template, int __flags), mkostemp64)
677 __nonnull ((1)) __wur;
678# else
679# define mkostemp mkostemp64
680# endif
681# endif
682# ifdef __USE_LARGEFILE64
683extern int mkostemp64 (char *__template, int __flags) __nonnull ((1)) __wur;
684# endif
685
686/* Similar to mkostemp, but the template can have a suffix after the
687 XXXXXX. The length of the suffix is specified in the second
688 parameter.
689
690 This function is a possible cancellation point and therefore not
691 marked with __THROW. */
692# ifndef __USE_FILE_OFFSET64
693extern int mkostemps (char *__template, int __suffixlen, int __flags)
694 __nonnull ((1)) __wur;
695# else
696# ifdef __REDIRECT
697extern int __REDIRECT (mkostemps, (char *__template, int __suffixlen,
698 int __flags), mkostemps64)
699 __nonnull ((1)) __wur;
700# else
701# define mkostemps mkostemps64
702# endif
703# endif
704# ifdef __USE_LARGEFILE64
705extern int mkostemps64 (char *__template, int __suffixlen, int __flags)
706 __nonnull ((1)) __wur;
707# endif
708#endif
709
710
711__BEGIN_NAMESPACE_STD
712/* Execute the given line as a shell command.
713
714 This function is a cancellation point and therefore not marked with
715 __THROW. */
716extern int system (const char *__command) __wur;
717__END_NAMESPACE_STD
718
719
720#ifdef __USE_GNU
721/* Return a malloc'd string containing the canonical absolute name of the
722 existing named file. */
723extern char *canonicalize_file_name (const char *__name)
724 __THROW __nonnull ((1)) __wur;
725#endif
726
727#if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
728/* Return the canonical absolute name of file NAME. If RESOLVED is
729 null, the result is malloc'd; otherwise, if the canonical name is
730 PATH_MAX chars or more, returns null with `errno' set to
731 ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars,
732 returns the name in RESOLVED. */
733extern char *realpath (const char *__restrict __name,
734 char *__restrict __resolved) __THROW __wur;
735#endif
736
737
738/* Shorthand for type of comparison functions. */
739#ifndef __COMPAR_FN_T
740# define __COMPAR_FN_T
741typedef int (*__compar_fn_t) (const void *, const void *);
742
743# ifdef __USE_GNU
744typedef __compar_fn_t comparison_fn_t;
745# endif
746#endif
747#ifdef __USE_GNU
748typedef int (*__compar_d_fn_t) (const void *, const void *, void *);
749#endif
750
751__BEGIN_NAMESPACE_STD
752/* Do a binary search for KEY in BASE, which consists of NMEMB elements
753 of SIZE bytes each, using COMPAR to perform the comparisons. */
754extern void *bsearch (const void *__key, const void *__base,
755 size_t __nmemb, size_t __size, __compar_fn_t __compar)
756 __nonnull ((1, 2, 5)) __wur;
757
758#ifdef __USE_EXTERN_INLINES
759# include <bits/stdlib-bsearch.h>
760#endif
761
762/* Sort NMEMB elements of BASE, of SIZE bytes each,
763 using COMPAR to perform the comparisons. */
764extern void qsort (void *__base, size_t __nmemb, size_t __size,
765 __compar_fn_t __compar) __nonnull ((1, 4));
766#ifdef __USE_GNU
767extern void qsort_r (void *__base, size_t __nmemb, size_t __size,
768 __compar_d_fn_t __compar, void *__arg)
769 __nonnull ((1, 4));
770#endif
771
772
773/* Return the absolute value of X. */
774extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur;
775extern long int labs (long int __x) __THROW __attribute__ ((__const__)) __wur;
776__END_NAMESPACE_STD
777
778#ifdef __USE_ISOC99
779__extension__ extern long long int llabs (long long int __x)
780 __THROW __attribute__ ((__const__)) __wur;
781#endif
782
783
784__BEGIN_NAMESPACE_STD
785/* Return the `div_t', `ldiv_t' or `lldiv_t' representation
786 of the value of NUMER over DENOM. */
787/* GCC may have built-ins for these someday. */
788extern div_t div (int __numer, int __denom)
789 __THROW __attribute__ ((__const__)) __wur;
790extern ldiv_t ldiv (long int __numer, long int __denom)
791 __THROW __attribute__ ((__const__)) __wur;
792__END_NAMESPACE_STD
793
794#ifdef __USE_ISOC99
795__BEGIN_NAMESPACE_C99
796__extension__ extern lldiv_t lldiv (long long int __numer,
797 long long int __denom)
798 __THROW __attribute__ ((__const__)) __wur;
799__END_NAMESPACE_C99
800#endif
801
802
803#if (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K8) \
804 || defined __USE_MISC
805/* Convert floating point numbers to strings. The returned values are
806 valid only until another call to the same function. */
807
808/* Convert VALUE to a string with NDIGIT digits and return a pointer to
809 this. Set *DECPT with the position of the decimal character and *SIGN
810 with the sign of the number. */
811extern char *ecvt (double __value, int __ndigit, int *__restrict __decpt,
812 int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur;
813
814/* Convert VALUE to a string rounded to NDIGIT decimal digits. Set *DECPT
815 with the position of the decimal character and *SIGN with the sign of
816 the number. */
817extern char *fcvt (double __value, int __ndigit, int *__restrict __decpt,
818 int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur;
819
820/* If possible convert VALUE to a string with NDIGIT significant digits.
821 Otherwise use exponential representation. The resulting string will
822 be written to BUF. */
823extern char *gcvt (double __value, int __ndigit, char *__buf)
824 __THROW __nonnull ((3)) __wur;
825#endif
826
827#ifdef __USE_MISC
828/* Long double versions of above functions. */
829extern char *qecvt (long double __value, int __ndigit,
830 int *__restrict __decpt, int *__restrict __sign)
831 __THROW __nonnull ((3, 4)) __wur;
832extern char *qfcvt (long double __value, int __ndigit,
833 int *__restrict __decpt, int *__restrict __sign)
834 __THROW __nonnull ((3, 4)) __wur;
835extern char *qgcvt (long double __value, int __ndigit, char *__buf)
836 __THROW __nonnull ((3)) __wur;
837
838
839/* Reentrant version of the functions above which provide their own
840 buffers. */
841extern int ecvt_r (double __value, int __ndigit, int *__restrict __decpt,
842 int *__restrict __sign, char *__restrict __buf,
843 size_t __len) __THROW __nonnull ((3, 4, 5));
844extern int fcvt_r (double __value, int __ndigit, int *__restrict __decpt,
845 int *__restrict __sign, char *__restrict __buf,
846 size_t __len) __THROW __nonnull ((3, 4, 5));
847
848extern int qecvt_r (long double __value, int __ndigit,
849 int *__restrict __decpt, int *__restrict __sign,
850 char *__restrict __buf, size_t __len)
851 __THROW __nonnull ((3, 4, 5));
852extern int qfcvt_r (long double __value, int __ndigit,
853 int *__restrict __decpt, int *__restrict __sign,
854 char *__restrict __buf, size_t __len)
855 __THROW __nonnull ((3, 4, 5));
856#endif /* misc */
857
858
859__BEGIN_NAMESPACE_STD
860/* Return the length of the multibyte character
861 in S, which is no longer than N. */
862extern int mblen (const char *__s, size_t __n) __THROW;
863/* Return the length of the given multibyte character,
864 putting its `wchar_t' representation in *PWC. */
865extern int mbtowc (wchar_t *__restrict __pwc,
866 const char *__restrict __s, size_t __n) __THROW;
867/* Put the multibyte character represented
868 by WCHAR in S, returning its length. */
869extern int wctomb (char *__s, wchar_t __wchar) __THROW;
870
871
872/* Convert a multibyte string to a wide char string. */
873extern size_t mbstowcs (wchar_t *__restrict __pwcs,
874 const char *__restrict __s, size_t __n) __THROW;
875/* Convert a wide char string to multibyte string. */
876extern size_t wcstombs (char *__restrict __s,
877 const wchar_t *__restrict __pwcs, size_t __n)
878 __THROW;
879__END_NAMESPACE_STD
880
881
882#ifdef __USE_MISC
883/* Determine whether the string value of RESPONSE matches the affirmation
884 or negative response expression as specified by the LC_MESSAGES category
885 in the program's current locale. Returns 1 if affirmative, 0 if
886 negative, and -1 if not matching. */
887extern int rpmatch (const char *__response) __THROW __nonnull ((1)) __wur;
888#endif
889
890
891#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
892/* Parse comma separated suboption from *OPTIONP and match against
893 strings in TOKENS. If found return index and set *VALUEP to
894 optional value introduced by an equal sign. If the suboption is
895 not part of TOKENS return in *VALUEP beginning of unknown
896 suboption. On exit *OPTIONP is set to the beginning of the next
897 token or at the terminating NUL character. */
898extern int getsubopt (char **__restrict __optionp,
899 char *const *__restrict __tokens,
900 char **__restrict __valuep)
901 __THROW __nonnull ((1, 2, 3)) __wur;
902#endif
903
904
905#ifdef __USE_XOPEN
906/* Setup DES tables according KEY. */
907extern void setkey (const char *__key) __THROW __nonnull ((1));
908#endif
909
910
911/* X/Open pseudo terminal handling. */
912
913#ifdef __USE_XOPEN2KXSI
914/* Return a master pseudo-terminal handle. */
915extern int posix_openpt (int __oflag) __wur;
916#endif
917
918#ifdef __USE_XOPEN
919/* The next four functions all take a master pseudo-tty fd and
920 perform an operation on the associated slave: */
921
922/* Chown the slave to the calling user. */
923extern int grantpt (int __fd) __THROW;
924
925/* Release an internal lock so the slave can be opened.
926 Call after grantpt(). */
927extern int unlockpt (int __fd) __THROW;
928
929/* Return the pathname of the pseudo terminal slave associated with
930 the master FD is open on, or NULL on errors.
931 The returned storage is good until the next call to this function. */
932extern char *ptsname (int __fd) __THROW __wur;
933#endif
934
935#ifdef __USE_GNU
936/* Store at most BUFLEN characters of the pathname of the slave pseudo
937 terminal associated with the master FD is open on in BUF.
938 Return 0 on success, otherwise an error number. */
939extern int ptsname_r (int __fd, char *__buf, size_t __buflen)
940 __THROW __nonnull ((2));
941
942/* Open a master pseudo terminal and return its file descriptor. */
943extern int getpt (void);
944#endif
945
946#ifdef __USE_MISC
947/* Put the 1 minute, 5 minute and 15 minute load averages into the first
948 NELEM elements of LOADAVG. Return the number written (never more than
949 three, but may be less than NELEM), or -1 if an error occurred. */
950extern int getloadavg (double __loadavg[], int __nelem)
951 __THROW __nonnull ((1));
952#endif
953
954#include <bits/stdlib-float.h>
955
956/* Define some macros helping to catch buffer overflows. */
957#if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function
958# include <bits/stdlib.h>
959#endif
960#ifdef __LDBL_COMPAT
961# include <bits/stdlib-ldbl.h>
962#endif
963
964#endif /* don't just need malloc and calloc */
965#undef __need_malloc_and_calloc
966
967__END_DECLS
968
969#endif /* stdlib.h */
970