1/* Copyright (C) 1991-2007, 2009-2011, 2012 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_BSD
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 BSD. */
76
77# define __WAIT_INT(status) (status)
78# define __WAIT_STATUS int *
79# define __WAIT_STATUS_DEFN int *
80
81# endif /* Use BSD. */
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#if defined __USE_ISOC99 || (defined __GLIBC_HAVE_LONG_LONG && defined __USE_MISC)
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#if defined __GLIBC_HAVE_LONG_LONG && defined __USE_BSD
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 /* GCC and use BSD. */
204
205#if defined __USE_ISOC99 || (defined __GLIBC_HAVE_LONG_LONG && defined __USE_MISC)
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 GCC and 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 double
278__NTH (atof (const char *__nptr))
279{
280 return strtod (__nptr, (char **) NULL);
281}
282__extern_inline int
283__NTH (atoi (const char *__nptr))
284{
285 return (int) strtol (__nptr, (char **) NULL, 10);
286}
287__extern_inline long int
288__NTH (atol (const char *__nptr))
289{
290 return strtol (__nptr, (char **) NULL, 10);
291}
292__END_NAMESPACE_STD
293
294# if defined __USE_MISC || defined __USE_ISOC99
295__BEGIN_NAMESPACE_C99
296__extension__ __extern_inline long long int
297__NTH (atoll (const char *__nptr))
298{
299 return strtoll (__nptr, (char **) NULL, 10);
300}
301__END_NAMESPACE_C99
302# endif
303#endif /* Optimizing and Inlining. */
304
305
306#if defined __USE_SVID || defined __USE_XOPEN_EXTENDED
307/* Convert N to base 64 using the digits "./0-9A-Za-z", least-significant
308 digit first. Returns a pointer to static storage overwritten by the
309 next call. */
310extern char *l64a (long int __n) __THROW __wur;
311
312/* Read a number from a string S in base 64 as above. */
313extern long int a64l (const char *__s)
314 __THROW __attribute_pure__ __nonnull ((1)) __wur;
315
316#endif /* Use SVID || extended X/Open. */
317
318#if defined __USE_SVID || defined __USE_XOPEN_EXTENDED || defined __USE_BSD
319# include <sys/types.h> /* we need int32_t... */
320
321/* These are the functions that actually do things. The `random', `srandom',
322 `initstate' and `setstate' functions are those from BSD Unices.
323 The `rand' and `srand' functions are required by the ANSI standard.
324 We provide both interfaces to the same random number generator. */
325/* Return a random long integer between 0 and RAND_MAX inclusive. */
326extern long int random (void) __THROW;
327
328/* Seed the random number generator with the given number. */
329extern void srandom (unsigned int __seed) __THROW;
330
331/* Initialize the random number generator to use state buffer STATEBUF,
332 of length STATELEN, and seed it with SEED. Optimal lengths are 8, 16,
333 32, 64, 128 and 256, the bigger the better; values less than 8 will
334 cause an error and values greater than 256 will be rounded down. */
335extern char *initstate (unsigned int __seed, char *__statebuf,
336 size_t __statelen) __THROW __nonnull ((2));
337
338/* Switch the random number generator to state buffer STATEBUF,
339 which should have been previously initialized by `initstate'. */
340extern char *setstate (char *__statebuf) __THROW __nonnull ((1));
341
342
343# ifdef __USE_MISC
344/* Reentrant versions of the `random' family of functions.
345 These functions all use the following data structure to contain
346 state, rather than global state variables. */
347
348struct random_data
349 {
350 int32_t *fptr; /* Front pointer. */
351 int32_t *rptr; /* Rear pointer. */
352 int32_t *state; /* Array of state values. */
353 int rand_type; /* Type of random number generator. */
354 int rand_deg; /* Degree of random number generator. */
355 int rand_sep; /* Distance between front and rear. */
356 int32_t *end_ptr; /* Pointer behind state table. */
357 };
358
359extern int random_r (struct random_data *__restrict __buf,
360 int32_t *__restrict __result) __THROW __nonnull ((1, 2));
361
362extern int srandom_r (unsigned int __seed, struct random_data *__buf)
363 __THROW __nonnull ((2));
364
365extern int initstate_r (unsigned int __seed, char *__restrict __statebuf,
366 size_t __statelen,
367 struct random_data *__restrict __buf)
368 __THROW __nonnull ((2, 4));
369
370extern int setstate_r (char *__restrict __statebuf,
371 struct random_data *__restrict __buf)
372 __THROW __nonnull ((1, 2));
373# endif /* Use misc. */
374#endif /* Use SVID || extended X/Open || BSD. */
375
376
377__BEGIN_NAMESPACE_STD
378/* Return a random integer between 0 and RAND_MAX inclusive. */
379extern int rand (void) __THROW;
380/* Seed the random number generator with the given number. */
381extern void srand (unsigned int __seed) __THROW;
382__END_NAMESPACE_STD
383
384#ifdef __USE_POSIX
385/* Reentrant interface according to POSIX.1. */
386extern int rand_r (unsigned int *__seed) __THROW;
387#endif
388
389
390#if defined __USE_SVID || defined __USE_XOPEN
391/* System V style 48-bit random number generator functions. */
392
393/* Return non-negative, double-precision floating-point value in [0.0,1.0). */
394extern double drand48 (void) __THROW;
395extern double erand48 (unsigned short int __xsubi[3]) __THROW __nonnull ((1));
396
397/* Return non-negative, long integer in [0,2^31). */
398extern long int lrand48 (void) __THROW;
399extern long int nrand48 (unsigned short int __xsubi[3])
400 __THROW __nonnull ((1));
401
402/* Return signed, long integers in [-2^31,2^31). */
403extern long int mrand48 (void) __THROW;
404extern long int jrand48 (unsigned short int __xsubi[3])
405 __THROW __nonnull ((1));
406
407/* Seed random number generator. */
408extern void srand48 (long int __seedval) __THROW;
409extern unsigned short int *seed48 (unsigned short int __seed16v[3])
410 __THROW __nonnull ((1));
411extern void lcong48 (unsigned short int __param[7]) __THROW __nonnull ((1));
412
413# ifdef __USE_MISC
414/* Data structure for communication with thread safe versions. This
415 type is to be regarded as opaque. It's only exported because users
416 have to allocate objects of this type. */
417struct drand48_data
418 {
419 unsigned short int __x[3]; /* Current state. */
420 unsigned short int __old_x[3]; /* Old state. */
421 unsigned short int __c; /* Additive const. in congruential formula. */
422 unsigned short int __init; /* Flag for initializing. */
423 unsigned long long int __a; /* Factor in congruential formula. */
424 };
425
426/* Return non-negative, double-precision floating-point value in [0.0,1.0). */
427extern int drand48_r (struct drand48_data *__restrict __buffer,
428 double *__restrict __result) __THROW __nonnull ((1, 2));
429extern int erand48_r (unsigned short int __xsubi[3],
430 struct drand48_data *__restrict __buffer,
431 double *__restrict __result) __THROW __nonnull ((1, 2));
432
433/* Return non-negative, long integer in [0,2^31). */
434extern int lrand48_r (struct drand48_data *__restrict __buffer,
435 long int *__restrict __result)
436 __THROW __nonnull ((1, 2));
437extern int nrand48_r (unsigned short int __xsubi[3],
438 struct drand48_data *__restrict __buffer,
439 long int *__restrict __result)
440 __THROW __nonnull ((1, 2));
441
442/* Return signed, long integers in [-2^31,2^31). */
443extern int mrand48_r (struct drand48_data *__restrict __buffer,
444 long int *__restrict __result)
445 __THROW __nonnull ((1, 2));
446extern int jrand48_r (unsigned short int __xsubi[3],
447 struct drand48_data *__restrict __buffer,
448 long int *__restrict __result)
449 __THROW __nonnull ((1, 2));
450
451/* Seed random number generator. */
452extern int srand48_r (long int __seedval, struct drand48_data *__buffer)
453 __THROW __nonnull ((2));
454
455extern int seed48_r (unsigned short int __seed16v[3],
456 struct drand48_data *__buffer) __THROW __nonnull ((1, 2));
457
458extern int lcong48_r (unsigned short int __param[7],
459 struct drand48_data *__buffer)
460 __THROW __nonnull ((1, 2));
461# endif /* Use misc. */
462#endif /* Use SVID or X/Open. */
463
464#endif /* don't just need malloc and calloc */
465
466#ifndef __malloc_and_calloc_defined
467# define __malloc_and_calloc_defined
468__BEGIN_NAMESPACE_STD
469/* Allocate SIZE bytes of memory. */
470extern void *malloc (size_t __size) __THROW __attribute_malloc__ __wur;
471/* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */
472extern void *calloc (size_t __nmemb, size_t __size)
473 __THROW __attribute_malloc__ __wur;
474__END_NAMESPACE_STD
475#endif
476
477#ifndef __need_malloc_and_calloc
478__BEGIN_NAMESPACE_STD
479/* Re-allocate the previously allocated block
480 in PTR, making the new block SIZE bytes long. */
481/* __attribute_malloc__ is not used, because if realloc returns
482 the same pointer that was passed to it, aliasing needs to be allowed
483 between objects pointed by the old and new pointers. */
484extern void *realloc (void *__ptr, size_t __size)
485 __THROW __attribute_warn_unused_result__;
486/* Free a block allocated by `malloc', `realloc' or `calloc'. */
487extern void free (void *__ptr) __THROW;
488__END_NAMESPACE_STD
489
490#ifdef __USE_MISC
491/* Free a block. An alias for `free'. (Sun Unices). */
492extern void cfree (void *__ptr) __THROW;
493#endif /* Use misc. */
494
495#if defined __USE_GNU || defined __USE_BSD || defined __USE_MISC
496# include <alloca.h>
497#endif /* Use GNU, BSD, or misc. */
498
499#if (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K) \
500 || defined __USE_BSD
501/* Allocate SIZE bytes on a page boundary. The storage cannot be freed. */
502extern void *valloc (size_t __size) __THROW __attribute_malloc__ __wur;
503#endif
504
505#ifdef __USE_XOPEN2K
506/* Allocate memory of SIZE bytes with an alignment of ALIGNMENT. */
507extern int posix_memalign (void **__memptr, size_t __alignment, size_t __size)
508 __THROW __nonnull ((1)) __wur;
509#endif
510
511#ifdef __USE_ISOC11
512/* ISO C variant of aligned allocation. */
513extern void *aligned_alloc (size_t __alignment, size_t __size)
514 __THROW __wur __attribute__ ((__malloc__, __alloc_size__ (2)));
515#endif
516
517__BEGIN_NAMESPACE_STD
518/* Abort execution and generate a core-dump. */
519extern void abort (void) __THROW __attribute__ ((__noreturn__));
520
521
522/* Register a function to be called when `exit' is called. */
523extern int atexit (void (*__func) (void)) __THROW __nonnull ((1));
524
525#if defined __USE_ISOC11 || defined __USE_ISOCXX11
526/* Register a function to be called when `quick_exit' is called. */
527# ifdef __cplusplus
528extern "C++" int at_quick_exit (void (*__func) (void))
529 __THROW __asm ("at_quick_exit") __nonnull ((1));
530# else
531extern int at_quick_exit (void (*__func) (void)) __THROW __nonnull ((1));
532# endif
533#endif
534__END_NAMESPACE_STD
535
536#ifdef __USE_MISC
537/* Register a function to be called with the status
538 given to `exit' and the given argument. */
539extern int on_exit (void (*__func) (int __status, void *__arg), void *__arg)
540 __THROW __nonnull ((1));
541#endif
542
543__BEGIN_NAMESPACE_STD
544/* Call all functions registered with `atexit' and `on_exit',
545 in the reverse of the order in which they were registered,
546 perform stdio cleanup, and terminate program execution with STATUS. */
547extern void exit (int __status) __THROW __attribute__ ((__noreturn__));
548
549#if defined __USE_ISOC11 || defined __USE_ISOCXX11
550/* Call all functions registered with `at_quick_exit' in the reverse
551 of the order in which they were registered and terminate program
552 execution with STATUS. */
553extern void quick_exit (int __status) __THROW __attribute__ ((__noreturn__));
554#endif
555__END_NAMESPACE_STD
556
557#ifdef __USE_ISOC99
558__BEGIN_NAMESPACE_C99
559/* Terminate the program with STATUS without calling any of the
560 functions registered with `atexit' or `on_exit'. */
561extern void _Exit (int __status) __THROW __attribute__ ((__noreturn__));
562__END_NAMESPACE_C99
563#endif
564
565
566__BEGIN_NAMESPACE_STD
567/* Return the value of envariable NAME, or NULL if it doesn't exist. */
568extern char *getenv (const char *__name) __THROW __nonnull ((1)) __wur;
569__END_NAMESPACE_STD
570
571/* This function is similar to the above but returns NULL if the
572 programs is running with SUID or SGID enabled. */
573extern char *__secure_getenv (const char *__name)
574 __THROW __nonnull ((1)) __wur;
575
576#if defined __USE_SVID || defined __USE_XOPEN
577/* The SVID says this is in <stdio.h>, but this seems a better place. */
578/* Put STRING, which is of the form "NAME=VALUE", in the environment.
579 If there is no `=', remove NAME from the environment. */
580extern int putenv (char *__string) __THROW __nonnull ((1));
581#endif
582
583#if defined __USE_BSD || defined __USE_XOPEN2K
584/* Set NAME to VALUE in the environment.
585 If REPLACE is nonzero, overwrite an existing value. */
586extern int setenv (const char *__name, const char *__value, int __replace)
587 __THROW __nonnull ((2));
588
589/* Remove the variable NAME from the environment. */
590extern int unsetenv (const char *__name) __THROW __nonnull ((1));
591#endif
592
593#ifdef __USE_MISC
594/* The `clearenv' was planned to be added to POSIX.1 but probably
595 never made it. Nevertheless the POSIX.9 standard (POSIX bindings
596 for Fortran 77) requires this function. */
597extern int clearenv (void) __THROW;
598#endif
599
600
601#if defined __USE_MISC \
602 || (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K)
603/* Generate a unique temporary file name from TEMPLATE.
604 The last six characters of TEMPLATE must be "XXXXXX";
605 they are replaced with a string that makes the file name unique.
606 Always returns TEMPLATE, it's either a temporary file name or a null
607 string if it cannot get a unique file name. */
608extern char *mktemp (char *__template) __THROW __nonnull ((1));
609#endif
610
611#if defined __USE_MISC || defined __USE_XOPEN_EXTENDED \
612 || defined __USE_XOPEN2K8
613/* Generate a unique temporary file name from TEMPLATE.
614 The last six characters of TEMPLATE must be "XXXXXX";
615 they are replaced with a string that makes the filename unique.
616 Returns a file descriptor open on the file for reading and writing,
617 or -1 if it cannot create a uniquely-named file.
618
619 This function is a possible cancellation point and therefore not
620 marked with __THROW. */
621# ifndef __USE_FILE_OFFSET64
622extern int mkstemp (char *__template) __nonnull ((1)) __wur;
623# else
624# ifdef __REDIRECT
625extern int __REDIRECT (mkstemp, (char *__template), mkstemp64)
626 __nonnull ((1)) __wur;
627# else
628# define mkstemp mkstemp64
629# endif
630# endif
631# ifdef __USE_LARGEFILE64
632extern int mkstemp64 (char *__template) __nonnull ((1)) __wur;
633# endif
634#endif
635
636#ifdef __USE_MISC
637/* Similar to mkstemp, but the template can have a suffix after the
638 XXXXXX. The length of the suffix is specified in the second
639 parameter.
640
641 This function is a possible cancellation point and therefore not
642 marked with __THROW. */
643# ifndef __USE_FILE_OFFSET64
644extern int mkstemps (char *__template, int __suffixlen) __nonnull ((1)) __wur;
645# else
646# ifdef __REDIRECT
647extern int __REDIRECT (mkstemps, (char *__template, int __suffixlen),
648 mkstemps64) __nonnull ((1)) __wur;
649# else
650# define mkstemps mkstemps64
651# endif
652# endif
653# ifdef __USE_LARGEFILE64
654extern int mkstemps64 (char *__template, int __suffixlen)
655 __nonnull ((1)) __wur;
656# endif
657#endif
658
659#if defined __USE_BSD || defined __USE_XOPEN2K8
660/* Create a unique temporary directory from TEMPLATE.
661 The last six characters of TEMPLATE must be "XXXXXX";
662 they are replaced with a string that makes the directory name unique.
663 Returns TEMPLATE, or a null pointer if it cannot get a unique name.
664 The directory is created mode 700. */
665extern char *mkdtemp (char *__template) __THROW __nonnull ((1)) __wur;
666#endif
667
668#ifdef __USE_GNU
669/* Generate a unique temporary file name from TEMPLATE similar to
670 mkstemp. But allow the caller to pass additional flags which are
671 used in the open call to create the file..
672
673 This function is a possible cancellation point and therefore not
674 marked with __THROW. */
675# ifndef __USE_FILE_OFFSET64
676extern int mkostemp (char *__template, int __flags) __nonnull ((1)) __wur;
677# else
678# ifdef __REDIRECT
679extern int __REDIRECT (mkostemp, (char *__template, int __flags), mkostemp64)
680 __nonnull ((1)) __wur;
681# else
682# define mkostemp mkostemp64
683# endif
684# endif
685# ifdef __USE_LARGEFILE64
686extern int mkostemp64 (char *__template, int __flags) __nonnull ((1)) __wur;
687# endif
688
689/* Similar to mkostemp, but the template can have a suffix after the
690 XXXXXX. The length of the suffix is specified in the second
691 parameter.
692
693 This function is a possible cancellation point and therefore not
694 marked with __THROW. */
695# ifndef __USE_FILE_OFFSET64
696extern int mkostemps (char *__template, int __suffixlen, int __flags)
697 __nonnull ((1)) __wur;
698# else
699# ifdef __REDIRECT
700extern int __REDIRECT (mkostemps, (char *__template, int __suffixlen,
701 int __flags), mkostemps64)
702 __nonnull ((1)) __wur;
703# else
704# define mkostemps mkostemps64
705# endif
706# endif
707# ifdef __USE_LARGEFILE64
708extern int mkostemps64 (char *__template, int __suffixlen, int __flags)
709 __nonnull ((1)) __wur;
710# endif
711#endif
712
713
714__BEGIN_NAMESPACE_STD
715/* Execute the given line as a shell command.
716
717 This function is a cancellation point and therefore not marked with
718 __THROW. */
719extern int system (const char *__command) __wur;
720__END_NAMESPACE_STD
721
722
723#ifdef __USE_GNU
724/* Return a malloc'd string containing the canonical absolute name of the
725 existing named file. */
726extern char *canonicalize_file_name (const char *__name)
727 __THROW __nonnull ((1)) __wur;
728#endif
729
730#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
731/* Return the canonical absolute name of file NAME. If RESOLVED is
732 null, the result is malloc'd; otherwise, if the canonical name is
733 PATH_MAX chars or more, returns null with `errno' set to
734 ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars,
735 returns the name in RESOLVED. */
736extern char *realpath (const char *__restrict __name,
737 char *__restrict __resolved) __THROW __wur;
738#endif
739
740
741/* Shorthand for type of comparison functions. */
742#ifndef __COMPAR_FN_T
743# define __COMPAR_FN_T
744typedef int (*__compar_fn_t) (const void *, const void *);
745
746# ifdef __USE_GNU
747typedef __compar_fn_t comparison_fn_t;
748# endif
749#endif
750#ifdef __USE_GNU
751typedef int (*__compar_d_fn_t) (const void *, const void *, void *);
752#endif
753
754__BEGIN_NAMESPACE_STD
755/* Do a binary search for KEY in BASE, which consists of NMEMB elements
756 of SIZE bytes each, using COMPAR to perform the comparisons. */
757extern void *bsearch (const void *__key, const void *__base,
758 size_t __nmemb, size_t __size, __compar_fn_t __compar)
759 __nonnull ((1, 2, 5)) __wur;
760
761/* Sort NMEMB elements of BASE, of SIZE bytes each,
762 using COMPAR to perform the comparisons. */
763extern void qsort (void *__base, size_t __nmemb, size_t __size,
764 __compar_fn_t __compar) __nonnull ((1, 4));
765#ifdef __USE_GNU
766extern void qsort_r (void *__base, size_t __nmemb, size_t __size,
767 __compar_d_fn_t __compar, void *__arg)
768 __nonnull ((1, 4));
769#endif
770
771
772/* Return the absolute value of X. */
773extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur;
774extern long int labs (long int __x) __THROW __attribute__ ((__const__)) __wur;
775__END_NAMESPACE_STD
776
777#ifdef __USE_ISOC99
778__extension__ extern long long int llabs (long long int __x)
779 __THROW __attribute__ ((__const__)) __wur;
780#endif
781
782
783__BEGIN_NAMESPACE_STD
784/* Return the `div_t', `ldiv_t' or `lldiv_t' representation
785 of the value of NUMER over DENOM. */
786/* GCC may have built-ins for these someday. */
787extern div_t div (int __numer, int __denom)
788 __THROW __attribute__ ((__const__)) __wur;
789extern ldiv_t ldiv (long int __numer, long int __denom)
790 __THROW __attribute__ ((__const__)) __wur;
791__END_NAMESPACE_STD
792
793#ifdef __USE_ISOC99
794__BEGIN_NAMESPACE_C99
795__extension__ extern lldiv_t lldiv (long long int __numer,
796 long long int __denom)
797 __THROW __attribute__ ((__const__)) __wur;
798__END_NAMESPACE_C99
799#endif
800
801
802#if (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K) \
803 || defined __USE_SVID
804/* Convert floating point numbers to strings. The returned values are
805 valid only until another call to the same function. */
806
807/* Convert VALUE to a string with NDIGIT digits and return a pointer to
808 this. Set *DECPT with the position of the decimal character and *SIGN
809 with the sign of the number. */
810extern char *ecvt (double __value, int __ndigit, int *__restrict __decpt,
811 int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur;
812
813/* Convert VALUE to a string rounded to NDIGIT decimal digits. Set *DECPT
814 with the position of the decimal character and *SIGN with the sign of
815 the number. */
816extern char *fcvt (double __value, int __ndigit, int *__restrict __decpt,
817 int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur;
818
819/* If possible convert VALUE to a string with NDIGIT significant digits.
820 Otherwise use exponential representation. The resulting string will
821 be written to BUF. */
822extern char *gcvt (double __value, int __ndigit, char *__buf)
823 __THROW __nonnull ((3)) __wur;
824
825
826# ifdef __USE_MISC
827/* Long double versions of above functions. */
828extern char *qecvt (long double __value, int __ndigit,
829 int *__restrict __decpt, int *__restrict __sign)
830 __THROW __nonnull ((3, 4)) __wur;
831extern char *qfcvt (long double __value, int __ndigit,
832 int *__restrict __decpt, int *__restrict __sign)
833 __THROW __nonnull ((3, 4)) __wur;
834extern char *qgcvt (long double __value, int __ndigit, char *__buf)
835 __THROW __nonnull ((3)) __wur;
836
837
838/* Reentrant version of the functions above which provide their own
839 buffers. */
840extern int ecvt_r (double __value, int __ndigit, int *__restrict __decpt,
841 int *__restrict __sign, char *__restrict __buf,
842 size_t __len) __THROW __nonnull ((3, 4, 5));
843extern int fcvt_r (double __value, int __ndigit, int *__restrict __decpt,
844 int *__restrict __sign, char *__restrict __buf,
845 size_t __len) __THROW __nonnull ((3, 4, 5));
846
847extern int qecvt_r (long double __value, int __ndigit,
848 int *__restrict __decpt, int *__restrict __sign,
849 char *__restrict __buf, size_t __len)
850 __THROW __nonnull ((3, 4, 5));
851extern int qfcvt_r (long double __value, int __ndigit,
852 int *__restrict __decpt, int *__restrict __sign,
853 char *__restrict __buf, size_t __len)
854 __THROW __nonnull ((3, 4, 5));
855# endif /* misc */
856#endif /* use MISC || use X/Open Unix */
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 __wur;
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 __wur;
867/* Put the multibyte character represented
868 by WCHAR in S, returning its length. */
869extern int wctomb (char *__s, wchar_t __wchar) __THROW __wur;
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_SVID
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 assoicated 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_BSD
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
955/* Define some macros helping to catch buffer overflows. */
956#if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function
957# include <bits/stdlib.h>
958#endif
959#ifdef __LDBL_COMPAT
960# include <bits/stdlib-ldbl.h>
961#endif
962
963#endif /* don't just need malloc and calloc */
964#undef __need_malloc_and_calloc
965
966__END_DECLS
967
968#endif /* stdlib.h */
969