1/* Copyright (C) 1991-2007, 2009, 2010, 2011 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, write to the Free
16   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17   02111-1307 USA.  */
18
19/*
20 *	ISO C99 Standard: 7.20 General utilities	<stdlib.h>
21 */
22
23#ifndef	_STDLIB_H
24
25#include <features.h>
26
27/* Get size_t, wchar_t and NULL from <stddef.h>.  */
28#define		__need_size_t
29#ifndef __need_malloc_and_calloc
30# define	__need_wchar_t
31# define	__need_NULL
32#endif
33#include <stddef.h>
34
35__BEGIN_DECLS
36
37#ifndef __need_malloc_and_calloc
38#define	_STDLIB_H	1
39
40#if (defined __USE_XOPEN || defined __USE_XOPEN2K8) && !defined _SYS_WAIT_H
41/* XPG requires a few symbols from <sys/wait.h> being defined.  */
42# include <bits/waitflags.h>
43# include <bits/waitstatus.h>
44
45# ifdef __USE_BSD
46
47/* Lots of hair to allow traditional BSD use of `union wait'
48   as well as POSIX.1 use of `int' for the status word.  */
49
50#  if defined __GNUC__ && !defined __cplusplus
51#   define __WAIT_INT(status) \
52  (__extension__ (((union { __typeof(status) __in; int __i; }) \
53		   { .__in = (status) }).__i))
54#  else
55#   define __WAIT_INT(status)	(*(int *) &(status))
56#  endif
57
58/* This is the type of the argument to `wait'.  The funky union
59   causes redeclarations with either `int *' or `union wait *' to be
60   allowed without complaint.  __WAIT_STATUS_DEFN is the type used in
61   the actual function definitions.  */
62
63#  if !defined __GNUC__ || __GNUC__ < 2 || defined __cplusplus
64#   define __WAIT_STATUS	void *
65#   define __WAIT_STATUS_DEFN	void *
66#  else
67/* This works in GCC 2.6.1 and later.  */
68typedef union
69  {
70    union wait *__uptr;
71    int *__iptr;
72  } __WAIT_STATUS __attribute__ ((__transparent_union__));
73#   define __WAIT_STATUS_DEFN	int *
74#  endif
75
76# else /* Don't use BSD.  */
77
78#  define __WAIT_INT(status)	(status)
79#  define __WAIT_STATUS		int *
80#  define __WAIT_STATUS_DEFN	int *
81
82# endif /* Use BSD.  */
83
84/* Define the macros <sys/wait.h> also would define this way.  */
85# define WEXITSTATUS(status)	__WEXITSTATUS (__WAIT_INT (status))
86# define WTERMSIG(status)	__WTERMSIG (__WAIT_INT (status))
87# define WSTOPSIG(status)	__WSTOPSIG (__WAIT_INT (status))
88# define WIFEXITED(status)	__WIFEXITED (__WAIT_INT (status))
89# define WIFSIGNALED(status)	__WIFSIGNALED (__WAIT_INT (status))
90# define WIFSTOPPED(status)	__WIFSTOPPED (__WAIT_INT (status))
91# ifdef __WIFCONTINUED
92#  define WIFCONTINUED(status)	__WIFCONTINUED (__WAIT_INT (status))
93# endif
94#endif	/* X/Open or XPG7 and <sys/wait.h> not included.  */
95
96__BEGIN_NAMESPACE_STD
97/* Returned by `div'.  */
98typedef struct
99  {
100    int quot;			/* Quotient.  */
101    int rem;			/* Remainder.  */
102  } div_t;
103
104/* Returned by `ldiv'.  */
105#ifndef __ldiv_t_defined
106typedef struct
107  {
108    long int quot;		/* Quotient.  */
109    long int rem;		/* Remainder.  */
110  } ldiv_t;
111# define __ldiv_t_defined	1
112#endif
113__END_NAMESPACE_STD
114
115#if defined __USE_ISOC99 && !defined __lldiv_t_defined
116__BEGIN_NAMESPACE_C99
117/* Returned by `lldiv'.  */
118__extension__ typedef struct
119  {
120    long long int quot;		/* Quotient.  */
121    long long int rem;		/* Remainder.  */
122  } lldiv_t;
123# define __lldiv_t_defined	1
124__END_NAMESPACE_C99
125#endif
126
127
128/* The largest number rand will return (same as INT_MAX).  */
129#define	RAND_MAX	2147483647
130
131
132/* We define these the same for all machines.
133   Changes from this to the outside world should be done in `_exit'.  */
134#define	EXIT_FAILURE	1	/* Failing exit status.  */
135#define	EXIT_SUCCESS	0	/* Successful exit status.  */
136
137
138/* Maximum length of a multibyte character in the current locale.  */
139#define	MB_CUR_MAX	(__ctype_get_mb_cur_max ())
140extern size_t __ctype_get_mb_cur_max (void) __THROW __wur;
141
142
143__BEGIN_NAMESPACE_STD
144/* Convert a string to a floating-point number.  */
145extern double atof (__const char *__nptr)
146     __THROW __attribute_pure__ __nonnull ((1)) __wur;
147/* Convert a string to an integer.  */
148extern int atoi (__const char *__nptr)
149     __THROW __attribute_pure__ __nonnull ((1)) __wur;
150/* Convert a string to a long integer.  */
151extern long int atol (__const char *__nptr)
152     __THROW __attribute_pure__ __nonnull ((1)) __wur;
153__END_NAMESPACE_STD
154
155#if defined __USE_ISOC99 || (defined __GLIBC_HAVE_LONG_LONG && defined __USE_MISC)
156__BEGIN_NAMESPACE_C99
157/* Convert a string to a long long integer.  */
158__extension__ extern long long int atoll (__const char *__nptr)
159     __THROW __attribute_pure__ __nonnull ((1)) __wur;
160__END_NAMESPACE_C99
161#endif
162
163__BEGIN_NAMESPACE_STD
164/* Convert a string to a floating-point number.  */
165extern double strtod (__const char *__restrict __nptr,
166		      char **__restrict __endptr)
167     __THROW __nonnull ((1)) __wur;
168__END_NAMESPACE_STD
169
170#ifdef	__USE_ISOC99
171__BEGIN_NAMESPACE_C99
172/* Likewise for `float' and `long double' sizes of floating-point numbers.  */
173extern float strtof (__const char *__restrict __nptr,
174		     char **__restrict __endptr) __THROW __nonnull ((1)) __wur;
175
176extern long double strtold (__const char *__restrict __nptr,
177			    char **__restrict __endptr)
178     __THROW __nonnull ((1)) __wur;
179__END_NAMESPACE_C99
180#endif
181
182__BEGIN_NAMESPACE_STD
183/* Convert a string to a long integer.  */
184extern long int strtol (__const char *__restrict __nptr,
185			char **__restrict __endptr, int __base)
186     __THROW __nonnull ((1)) __wur;
187/* Convert a string to an unsigned long integer.  */
188extern unsigned long int strtoul (__const char *__restrict __nptr,
189				  char **__restrict __endptr, int __base)
190     __THROW __nonnull ((1)) __wur;
191__END_NAMESPACE_STD
192
193#if defined __GLIBC_HAVE_LONG_LONG && defined __USE_BSD
194/* Convert a string to a quadword integer.  */
195__extension__
196extern long long int strtoq (__const char *__restrict __nptr,
197			     char **__restrict __endptr, int __base)
198     __THROW __nonnull ((1)) __wur;
199/* Convert a string to an unsigned quadword integer.  */
200__extension__
201extern unsigned long long int strtouq (__const char *__restrict __nptr,
202				       char **__restrict __endptr, int __base)
203     __THROW __nonnull ((1)) __wur;
204#endif /* GCC and use BSD.  */
205
206#if defined __USE_ISOC99 || (defined __GLIBC_HAVE_LONG_LONG && defined __USE_MISC)
207__BEGIN_NAMESPACE_C99
208/* Convert a string to a quadword integer.  */
209__extension__
210extern long long int strtoll (__const char *__restrict __nptr,
211			      char **__restrict __endptr, int __base)
212     __THROW __nonnull ((1)) __wur;
213/* Convert a string to an unsigned quadword integer.  */
214__extension__
215extern unsigned long long int strtoull (__const char *__restrict __nptr,
216					char **__restrict __endptr, int __base)
217     __THROW __nonnull ((1)) __wur;
218__END_NAMESPACE_C99
219#endif /* ISO C99 or GCC and use MISC.  */
220
221
222#ifdef __USE_GNU
223/* The concept of one static locale per category is not very well
224   thought out.  Many applications will need to process its data using
225   information from several different locales.  Another problem is
226   the implementation of the internationalization handling in the
227   ISO C++ standard library.  To support this another set of
228   the functions using locale data exist which take an additional
229   argument.
230
231   Attention: even though several *_l interfaces are part of POSIX:2008,
232   these are not.  */
233
234/* Structure for reentrant locale using functions.  This is an
235   (almost) opaque type for the user level programs.  */
236# include <xlocale.h>
237
238/* Special versions of the functions above which take the locale to
239   use as an additional parameter.  */
240extern long int strtol_l (__const char *__restrict __nptr,
241			  char **__restrict __endptr, int __base,
242			  __locale_t __loc) __THROW __nonnull ((1, 4)) __wur;
243
244extern unsigned long int strtoul_l (__const char *__restrict __nptr,
245				    char **__restrict __endptr,
246				    int __base, __locale_t __loc)
247     __THROW __nonnull ((1, 4)) __wur;
248
249__extension__
250extern long long int strtoll_l (__const char *__restrict __nptr,
251				char **__restrict __endptr, int __base,
252				__locale_t __loc)
253     __THROW __nonnull ((1, 4)) __wur;
254
255__extension__
256extern unsigned long long int strtoull_l (__const char *__restrict __nptr,
257					  char **__restrict __endptr,
258					  int __base, __locale_t __loc)
259     __THROW __nonnull ((1, 4)) __wur;
260
261extern double strtod_l (__const char *__restrict __nptr,
262			char **__restrict __endptr, __locale_t __loc)
263     __THROW __nonnull ((1, 3)) __wur;
264
265extern float strtof_l (__const char *__restrict __nptr,
266		       char **__restrict __endptr, __locale_t __loc)
267     __THROW __nonnull ((1, 3)) __wur;
268
269extern long double strtold_l (__const char *__restrict __nptr,
270			      char **__restrict __endptr,
271			      __locale_t __loc)
272     __THROW __nonnull ((1, 3)) __wur;
273#endif /* GNU */
274
275
276#ifdef __USE_EXTERN_INLINES
277__BEGIN_NAMESPACE_STD
278__extern_inline double
279__NTH (atof (__const char *__nptr))
280{
281  return strtod (__nptr, (char **) NULL);
282}
283__extern_inline int
284__NTH (atoi (__const char *__nptr))
285{
286  return (int) strtol (__nptr, (char **) NULL, 10);
287}
288__extern_inline long int
289__NTH (atol (__const char *__nptr))
290{
291  return strtol (__nptr, (char **) NULL, 10);
292}
293__END_NAMESPACE_STD
294
295# if defined __USE_MISC || defined __USE_ISOC99
296__BEGIN_NAMESPACE_C99
297__extension__ __extern_inline long long int
298__NTH (atoll (__const char *__nptr))
299{
300  return strtoll (__nptr, (char **) NULL, 10);
301}
302__END_NAMESPACE_C99
303# endif
304#endif /* Optimizing and Inlining.  */
305
306
307#if defined __USE_SVID || defined __USE_XOPEN_EXTENDED
308/* Convert N to base 64 using the digits "./0-9A-Za-z", least-significant
309   digit first.  Returns a pointer to static storage overwritten by the
310   next call.  */
311extern char *l64a (long int __n) __THROW __wur;
312
313/* Read a number from a string S in base 64 as above.  */
314extern long int a64l (__const char *__s)
315     __THROW __attribute_pure__ __nonnull ((1)) __wur;
316
317#endif	/* Use SVID || extended X/Open.  */
318
319#if defined __USE_SVID || defined __USE_XOPEN_EXTENDED || defined __USE_BSD
320# include <sys/types.h>	/* we need int32_t... */
321
322/* These are the functions that actually do things.  The `random', `srandom',
323   `initstate' and `setstate' functions are those from BSD Unices.
324   The `rand' and `srand' functions are required by the ANSI standard.
325   We provide both interfaces to the same random number generator.  */
326/* Return a random long integer between 0 and RAND_MAX inclusive.  */
327extern long int random (void) __THROW;
328
329/* Seed the random number generator with the given number.  */
330extern void srandom (unsigned int __seed) __THROW;
331
332/* Initialize the random number generator to use state buffer STATEBUF,
333   of length STATELEN, and seed it with SEED.  Optimal lengths are 8, 16,
334   32, 64, 128 and 256, the bigger the better; values less than 8 will
335   cause an error and values greater than 256 will be rounded down.  */
336extern char *initstate (unsigned int __seed, char *__statebuf,
337			size_t __statelen) __THROW __nonnull ((2));
338
339/* Switch the random number generator to state buffer STATEBUF,
340   which should have been previously initialized by `initstate'.  */
341extern char *setstate (char *__statebuf) __THROW __nonnull ((1));
342
343
344# ifdef __USE_MISC
345/* Reentrant versions of the `random' family of functions.
346   These functions all use the following data structure to contain
347   state, rather than global state variables.  */
348
349struct random_data
350  {
351    int32_t *fptr;		/* Front pointer.  */
352    int32_t *rptr;		/* Rear pointer.  */
353    int32_t *state;		/* Array of state values.  */
354    int rand_type;		/* Type of random number generator.  */
355    int rand_deg;		/* Degree of random number generator.  */
356    int rand_sep;		/* Distance between front and rear.  */
357    int32_t *end_ptr;		/* Pointer behind state table.  */
358  };
359
360extern int random_r (struct random_data *__restrict __buf,
361		     int32_t *__restrict __result) __THROW __nonnull ((1, 2));
362
363extern int srandom_r (unsigned int __seed, struct random_data *__buf)
364     __THROW __nonnull ((2));
365
366extern int initstate_r (unsigned int __seed, char *__restrict __statebuf,
367			size_t __statelen,
368			struct random_data *__restrict __buf)
369     __THROW __nonnull ((2, 4));
370
371extern int setstate_r (char *__restrict __statebuf,
372		       struct random_data *__restrict __buf)
373     __THROW __nonnull ((1, 2));
374# endif	/* Use misc.  */
375#endif	/* Use SVID || extended X/Open || BSD. */
376
377
378__BEGIN_NAMESPACE_STD
379/* Return a random integer between 0 and RAND_MAX inclusive.  */
380extern int rand (void) __THROW;
381/* Seed the random number generator with the given number.  */
382extern void srand (unsigned int __seed) __THROW;
383__END_NAMESPACE_STD
384
385#ifdef __USE_POSIX
386/* Reentrant interface according to POSIX.1.  */
387extern int rand_r (unsigned int *__seed) __THROW;
388#endif
389
390
391#if defined __USE_SVID || defined __USE_XOPEN
392/* System V style 48-bit random number generator functions.  */
393
394/* Return non-negative, double-precision floating-point value in [0.0,1.0).  */
395extern double drand48 (void) __THROW;
396extern double erand48 (unsigned short int __xsubi[3]) __THROW __nonnull ((1));
397
398/* Return non-negative, long integer in [0,2^31).  */
399extern long int lrand48 (void) __THROW;
400extern long int nrand48 (unsigned short int __xsubi[3])
401     __THROW __nonnull ((1));
402
403/* Return signed, long integers in [-2^31,2^31).  */
404extern long int mrand48 (void) __THROW;
405extern long int jrand48 (unsigned short int __xsubi[3])
406     __THROW __nonnull ((1));
407
408/* Seed random number generator.  */
409extern void srand48 (long int __seedval) __THROW;
410extern unsigned short int *seed48 (unsigned short int __seed16v[3])
411     __THROW __nonnull ((1));
412extern void lcong48 (unsigned short int __param[7]) __THROW __nonnull ((1));
413
414# ifdef __USE_MISC
415/* Data structure for communication with thread safe versions.  This
416   type is to be regarded as opaque.  It's only exported because users
417   have to allocate objects of this type.  */
418struct drand48_data
419  {
420    unsigned short int __x[3];	/* Current state.  */
421    unsigned short int __old_x[3]; /* Old state.  */
422    unsigned short int __c;	/* Additive const. in congruential formula.  */
423    unsigned short int __init;	/* Flag for initializing.  */
424    unsigned long long int __a;	/* Factor in congruential formula.  */
425  };
426
427/* Return non-negative, double-precision floating-point value in [0.0,1.0).  */
428extern int drand48_r (struct drand48_data *__restrict __buffer,
429		      double *__restrict __result) __THROW __nonnull ((1, 2));
430extern int erand48_r (unsigned short int __xsubi[3],
431		      struct drand48_data *__restrict __buffer,
432		      double *__restrict __result) __THROW __nonnull ((1, 2));
433
434/* Return non-negative, long integer in [0,2^31).  */
435extern int lrand48_r (struct drand48_data *__restrict __buffer,
436		      long int *__restrict __result)
437     __THROW __nonnull ((1, 2));
438extern int nrand48_r (unsigned short int __xsubi[3],
439		      struct drand48_data *__restrict __buffer,
440		      long int *__restrict __result)
441     __THROW __nonnull ((1, 2));
442
443/* Return signed, long integers in [-2^31,2^31).  */
444extern int mrand48_r (struct drand48_data *__restrict __buffer,
445		      long int *__restrict __result)
446     __THROW __nonnull ((1, 2));
447extern int jrand48_r (unsigned short int __xsubi[3],
448		      struct drand48_data *__restrict __buffer,
449		      long int *__restrict __result)
450     __THROW __nonnull ((1, 2));
451
452/* Seed random number generator.  */
453extern int srand48_r (long int __seedval, struct drand48_data *__buffer)
454     __THROW __nonnull ((2));
455
456extern int seed48_r (unsigned short int __seed16v[3],
457		     struct drand48_data *__buffer) __THROW __nonnull ((1, 2));
458
459extern int lcong48_r (unsigned short int __param[7],
460		      struct drand48_data *__buffer)
461     __THROW __nonnull ((1, 2));
462# endif	/* Use misc.  */
463#endif	/* Use SVID or X/Open.  */
464
465#endif /* don't just need malloc and calloc */
466
467#ifndef __malloc_and_calloc_defined
468# define __malloc_and_calloc_defined
469__BEGIN_NAMESPACE_STD
470/* Allocate SIZE bytes of memory.  */
471extern void *malloc (size_t __size) __THROW __attribute_malloc__ __wur;
472/* Allocate NMEMB elements of SIZE bytes each, all initialized to 0.  */
473extern void *calloc (size_t __nmemb, size_t __size)
474     __THROW __attribute_malloc__ __wur;
475__END_NAMESPACE_STD
476#endif
477
478#ifndef __need_malloc_and_calloc
479__BEGIN_NAMESPACE_STD
480/* Re-allocate the previously allocated block
481   in PTR, making the new block SIZE bytes long.  */
482/* __attribute_malloc__ is not used, because if realloc returns
483   the same pointer that was passed to it, aliasing needs to be allowed
484   between objects pointed by the old and new pointers.  */
485extern void *realloc (void *__ptr, size_t __size)
486     __THROW __attribute_warn_unused_result__;
487/* Free a block allocated by `malloc', `realloc' or `calloc'.  */
488extern void free (void *__ptr) __THROW;
489__END_NAMESPACE_STD
490
491#ifdef	__USE_MISC
492/* Free a block.  An alias for `free'.	(Sun Unices).  */
493extern void cfree (void *__ptr) __THROW;
494#endif /* Use misc.  */
495
496#if defined __USE_GNU || defined __USE_BSD || defined __USE_MISC
497# include <alloca.h>
498#endif /* Use GNU, BSD, or misc.  */
499
500#if (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K) \
501    || defined __USE_BSD
502/* Allocate SIZE bytes on a page boundary.  The storage cannot be freed.  */
503extern void *valloc (size_t __size) __THROW __attribute_malloc__ __wur;
504#endif
505
506#ifdef __USE_XOPEN2K
507/* Allocate memory of SIZE bytes with an alignment of ALIGNMENT.  */
508extern int posix_memalign (void **__memptr, size_t __alignment, size_t __size)
509     __THROW __nonnull ((1)) __wur;
510#endif
511
512__BEGIN_NAMESPACE_STD
513/* Abort execution and generate a core-dump.  */
514extern void abort (void) __THROW __attribute__ ((__noreturn__));
515
516
517/* Register a function to be called when `exit' is called.  */
518extern int atexit (void (*__func) (void)) __THROW __nonnull ((1));
519
520#ifdef __USE_GNU
521// XXX There should be a macro to signal with C++ revision is used.
522// XXX This function is in the C++1x revision.
523/* Register a function to be called when `quick_exit' is called.  */
524# ifdef __cplusplus
525extern "C++" int at_quick_exit (void (*__func) (void))
526     __THROW __asm ("at_quick_exit") __nonnull ((1));
527# else
528extern int at_quick_exit (void (*__func) (void)) __THROW __nonnull ((1));
529# endif
530#endif
531__END_NAMESPACE_STD
532
533#ifdef	__USE_MISC
534/* Register a function to be called with the status
535   given to `exit' and the given argument.  */
536extern int on_exit (void (*__func) (int __status, void *__arg), void *__arg)
537     __THROW __nonnull ((1));
538#endif
539
540__BEGIN_NAMESPACE_STD
541/* Call all functions registered with `atexit' and `on_exit',
542   in the reverse of the order in which they were registered,
543   perform stdio cleanup, and terminate program execution with STATUS.  */
544extern void exit (int __status) __THROW __attribute__ ((__noreturn__));
545
546#ifdef __USE_GNU
547// XXX There should be a macro to signal with C++ revision is used.
548// XXX This function is in the C++1x revision.
549/* Call all functions registered with `at_quick_exit' in the reverse
550   of the order in which they were registered and terminate program
551   execution with STATUS.  */
552extern void quick_exit (int __status) __THROW __attribute__ ((__noreturn__));
553#endif
554__END_NAMESPACE_STD
555
556#ifdef __USE_ISOC99
557__BEGIN_NAMESPACE_C99
558/* Terminate the program with STATUS without calling any of the
559   functions registered with `atexit' or `on_exit'.  */
560extern void _Exit (int __status) __THROW __attribute__ ((__noreturn__));
561__END_NAMESPACE_C99
562#endif
563
564
565__BEGIN_NAMESPACE_STD
566/* Return the value of envariable NAME, or NULL if it doesn't exist.  */
567extern char *getenv (__const char *__name) __THROW __nonnull ((1)) __wur;
568__END_NAMESPACE_STD
569
570/* This function is similar to the above but returns NULL if the
571   programs is running with SUID or SGID enabled.  */
572extern char *__secure_getenv (__const char *__name)
573     __THROW __nonnull ((1)) __wur;
574
575#if defined __USE_SVID || defined __USE_XOPEN
576/* The SVID says this is in <stdio.h>, but this seems a better place.	*/
577/* Put STRING, which is of the form "NAME=VALUE", in the environment.
578   If there is no `=', remove NAME from the environment.  */
579extern int putenv (char *__string) __THROW __nonnull ((1));
580#endif
581
582#if defined __USE_BSD || defined __USE_XOPEN2K
583/* Set NAME to VALUE in the environment.
584   If REPLACE is nonzero, overwrite an existing value.  */
585extern int setenv (__const char *__name, __const char *__value, int __replace)
586     __THROW __nonnull ((2));
587
588/* Remove the variable NAME from the environment.  */
589extern int unsetenv (__const char *__name) __THROW __nonnull ((1));
590#endif
591
592#ifdef	__USE_MISC
593/* The `clearenv' was planned to be added to POSIX.1 but probably
594   never made it.  Nevertheless the POSIX.9 standard (POSIX bindings
595   for Fortran 77) requires this function.  */
596extern int clearenv (void) __THROW;
597#endif
598
599
600#if defined __USE_MISC \
601    || (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K)
602/* Generate a unique temporary file name from TEMPLATE.
603   The last six characters of TEMPLATE must be "XXXXXX";
604   they are replaced with a string that makes the file name unique.
605   Returns TEMPLATE, or a null pointer if it cannot get a unique file name.  */
606extern char *mktemp (char *__template) __THROW __nonnull ((1)) __wur;
607#endif
608
609#if defined __USE_MISC || defined __USE_XOPEN_EXTENDED \
610    || defined __USE_XOPEN2K8
611/* Generate a unique temporary file name from TEMPLATE.
612   The last six characters of TEMPLATE must be "XXXXXX";
613   they are replaced with a string that makes the filename unique.
614   Returns a file descriptor open on the file for reading and writing,
615   or -1 if it cannot create a uniquely-named file.
616
617   This function is a possible cancellation point and therefore not
618   marked with __THROW.  */
619# ifndef __USE_FILE_OFFSET64
620extern int mkstemp (char *__template) __nonnull ((1)) __wur;
621# else
622#  ifdef __REDIRECT
623extern int __REDIRECT (mkstemp, (char *__template), mkstemp64)
624     __nonnull ((1)) __wur;
625#  else
626#   define mkstemp mkstemp64
627#  endif
628# endif
629# ifdef __USE_LARGEFILE64
630extern int mkstemp64 (char *__template) __nonnull ((1)) __wur;
631# endif
632#endif
633
634#ifdef __USE_MISC
635/* Similar to mkstemp, but the template can have a suffix after the
636   XXXXXX.  The length of the suffix is specified in the second
637   parameter.
638
639   This function is a possible cancellation point and therefore not
640   marked with __THROW.  */
641# ifndef __USE_FILE_OFFSET64
642extern int mkstemps (char *__template, int __suffixlen) __nonnull ((1)) __wur;
643# else
644#  ifdef __REDIRECT
645extern int __REDIRECT (mkstemps, (char *__template, int __suffixlen),
646		       mkstemps64) __nonnull ((1)) __wur;
647#  else
648#   define mkstemps mkstemps64
649#  endif
650# endif
651# ifdef __USE_LARGEFILE64
652extern int mkstemps64 (char *__template, int __suffixlen)
653     __nonnull ((1)) __wur;
654# endif
655#endif
656
657#if defined __USE_BSD || defined __USE_XOPEN2K8
658/* Create a unique temporary directory from TEMPLATE.
659   The last six characters of TEMPLATE must be "XXXXXX";
660   they are replaced with a string that makes the directory name unique.
661   Returns TEMPLATE, or a null pointer if it cannot get a unique name.
662   The directory is created mode 700.  */
663extern char *mkdtemp (char *__template) __THROW __nonnull ((1)) __wur;
664#endif
665
666#ifdef __USE_GNU
667/* Generate a unique temporary file name from TEMPLATE similar to
668   mkstemp.  But allow the caller to pass additional flags which are
669   used in the open call to create the file..
670
671   This function is a possible cancellation point and therefore not
672   marked with __THROW.  */
673# ifndef __USE_FILE_OFFSET64
674extern int mkostemp (char *__template, int __flags) __nonnull ((1)) __wur;
675# else
676#  ifdef __REDIRECT
677extern int __REDIRECT (mkostemp, (char *__template, int __flags), mkostemp64)
678     __nonnull ((1)) __wur;
679#  else
680#   define mkostemp mkostemp64
681#  endif
682# endif
683# ifdef __USE_LARGEFILE64
684extern int mkostemp64 (char *__template, int __flags) __nonnull ((1)) __wur;
685# endif
686
687/* Similar to mkostemp, but the template can have a suffix after the
688   XXXXXX.  The length of the suffix is specified in the second
689   parameter.
690
691   This function is a possible cancellation point and therefore not
692   marked with __THROW.  */
693# ifndef __USE_FILE_OFFSET64
694extern int mkostemps (char *__template, int __suffixlen, int __flags)
695     __nonnull ((1)) __wur;
696# else
697#  ifdef __REDIRECT
698extern int __REDIRECT (mkostemps, (char *__template, int __suffixlen,
699				   int __flags), mkostemps64)
700     __nonnull ((1)) __wur;
701#  else
702#   define mkostemps mkostemps64
703#  endif
704# endif
705# ifdef __USE_LARGEFILE64
706extern int mkostemps64 (char *__template, int __suffixlen, int __flags)
707     __nonnull ((1)) __wur;
708# endif
709#endif
710
711
712__BEGIN_NAMESPACE_STD
713/* Execute the given line as a shell command.
714
715   This function is a cancellation point and therefore not marked with
716   __THROW.  */
717extern int system (__const char *__command) __wur;
718__END_NAMESPACE_STD
719
720
721#ifdef	__USE_GNU
722/* Return a malloc'd string containing the canonical absolute name of the
723   existing named file.  */
724extern char *canonicalize_file_name (__const char *__name)
725     __THROW __nonnull ((1)) __wur;
726#endif
727
728#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
729/* Return the canonical absolute name of file NAME.  If RESOLVED is
730   null, the result is malloc'd; otherwise, if the canonical name is
731   PATH_MAX chars or more, returns null with `errno' set to
732   ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars,
733   returns the name in RESOLVED.  */
734extern char *realpath (__const char *__restrict __name,
735		       char *__restrict __resolved) __THROW __wur;
736#endif
737
738
739/* Shorthand for type of comparison functions.  */
740#ifndef __COMPAR_FN_T
741# define __COMPAR_FN_T
742typedef int (*__compar_fn_t) (__const void *, __const void *);
743
744# ifdef	__USE_GNU
745typedef __compar_fn_t comparison_fn_t;
746# endif
747#endif
748#ifdef __USE_GNU
749typedef int (*__compar_d_fn_t) (__const void *, __const void *, void *);
750#endif
751
752__BEGIN_NAMESPACE_STD
753/* Do a binary search for KEY in BASE, which consists of NMEMB elements
754   of SIZE bytes each, using COMPAR to perform the comparisons.  */
755extern void *bsearch (__const void *__key, __const void *__base,
756		      size_t __nmemb, size_t __size, __compar_fn_t __compar)
757     __nonnull ((1, 2, 5)) __wur;
758
759/* Sort NMEMB elements of BASE, of SIZE bytes each,
760   using COMPAR to perform the comparisons.  */
761extern void qsort (void *__base, size_t __nmemb, size_t __size,
762		   __compar_fn_t __compar) __nonnull ((1, 4));
763#ifdef __USE_GNU
764extern void qsort_r (void *__base, size_t __nmemb, size_t __size,
765		     __compar_d_fn_t __compar, void *__arg)
766  __nonnull ((1, 4));
767#endif
768
769
770/* Return the absolute value of X.  */
771extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur;
772extern long int labs (long int __x) __THROW __attribute__ ((__const__)) __wur;
773__END_NAMESPACE_STD
774
775#ifdef __USE_ISOC99
776__extension__ extern long long int llabs (long long int __x)
777     __THROW __attribute__ ((__const__)) __wur;
778#endif
779
780
781__BEGIN_NAMESPACE_STD
782/* Return the `div_t', `ldiv_t' or `lldiv_t' representation
783   of the value of NUMER over DENOM. */
784/* GCC may have built-ins for these someday.  */
785extern div_t div (int __numer, int __denom)
786     __THROW __attribute__ ((__const__)) __wur;
787extern ldiv_t ldiv (long int __numer, long int __denom)
788     __THROW __attribute__ ((__const__)) __wur;
789__END_NAMESPACE_STD
790
791#ifdef __USE_ISOC99
792__BEGIN_NAMESPACE_C99
793__extension__ extern lldiv_t lldiv (long long int __numer,
794				    long long int __denom)
795     __THROW __attribute__ ((__const__)) __wur;
796__END_NAMESPACE_C99
797#endif
798
799
800#if (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K) \
801    || defined __USE_SVID
802/* Convert floating point numbers to strings.  The returned values are
803   valid only until another call to the same function.  */
804
805/* Convert VALUE to a string with NDIGIT digits and return a pointer to
806   this.  Set *DECPT with the position of the decimal character and *SIGN
807   with the sign of the number.  */
808extern char *ecvt (double __value, int __ndigit, int *__restrict __decpt,
809		   int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur;
810
811/* Convert VALUE to a string rounded to NDIGIT decimal digits.  Set *DECPT
812   with the position of the decimal character and *SIGN with the sign of
813   the number.  */
814extern char *fcvt (double __value, int __ndigit, int *__restrict __decpt,
815		   int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur;
816
817/* If possible convert VALUE to a string with NDIGIT significant digits.
818   Otherwise use exponential representation.  The resulting string will
819   be written to BUF.  */
820extern char *gcvt (double __value, int __ndigit, char *__buf)
821     __THROW __nonnull ((3)) __wur;
822
823
824# ifdef __USE_MISC
825/* Long double versions of above functions.  */
826extern char *qecvt (long double __value, int __ndigit,
827		    int *__restrict __decpt, int *__restrict __sign)
828     __THROW __nonnull ((3, 4)) __wur;
829extern char *qfcvt (long double __value, int __ndigit,
830		    int *__restrict __decpt, int *__restrict __sign)
831     __THROW __nonnull ((3, 4)) __wur;
832extern char *qgcvt (long double __value, int __ndigit, char *__buf)
833     __THROW __nonnull ((3)) __wur;
834
835
836/* Reentrant version of the functions above which provide their own
837   buffers.  */
838extern int ecvt_r (double __value, int __ndigit, int *__restrict __decpt,
839		   int *__restrict __sign, char *__restrict __buf,
840		   size_t __len) __THROW __nonnull ((3, 4, 5));
841extern int fcvt_r (double __value, int __ndigit, int *__restrict __decpt,
842		   int *__restrict __sign, char *__restrict __buf,
843		   size_t __len) __THROW __nonnull ((3, 4, 5));
844
845extern int qecvt_r (long double __value, int __ndigit,
846		    int *__restrict __decpt, int *__restrict __sign,
847		    char *__restrict __buf, size_t __len)
848     __THROW __nonnull ((3, 4, 5));
849extern int qfcvt_r (long double __value, int __ndigit,
850		    int *__restrict __decpt, int *__restrict __sign,
851		    char *__restrict __buf, size_t __len)
852     __THROW __nonnull ((3, 4, 5));
853# endif	/* misc */
854#endif	/* use MISC || use X/Open Unix */
855
856
857__BEGIN_NAMESPACE_STD
858/* Return the length of the multibyte character
859   in S, which is no longer than N.  */
860extern int mblen (__const char *__s, size_t __n) __THROW __wur;
861/* Return the length of the given multibyte character,
862   putting its `wchar_t' representation in *PWC.  */
863extern int mbtowc (wchar_t *__restrict __pwc,
864		   __const char *__restrict __s, size_t __n) __THROW __wur;
865/* Put the multibyte character represented
866   by WCHAR in S, returning its length.  */
867extern int wctomb (char *__s, wchar_t __wchar) __THROW __wur;
868
869
870/* Convert a multibyte string to a wide char string.  */
871extern size_t mbstowcs (wchar_t *__restrict  __pwcs,
872			__const char *__restrict __s, size_t __n) __THROW;
873/* Convert a wide char string to multibyte string.  */
874extern size_t wcstombs (char *__restrict __s,
875			__const wchar_t *__restrict __pwcs, size_t __n)
876     __THROW;
877__END_NAMESPACE_STD
878
879
880#ifdef __USE_SVID
881/* Determine whether the string value of RESPONSE matches the affirmation
882   or negative response expression as specified by the LC_MESSAGES category
883   in the program's current locale.  Returns 1 if affirmative, 0 if
884   negative, and -1 if not matching.  */
885extern int rpmatch (__const char *__response) __THROW __nonnull ((1)) __wur;
886#endif
887
888
889#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
890/* Parse comma separated suboption from *OPTIONP and match against
891   strings in TOKENS.  If found return index and set *VALUEP to
892   optional value introduced by an equal sign.  If the suboption is
893   not part of TOKENS return in *VALUEP beginning of unknown
894   suboption.  On exit *OPTIONP is set to the beginning of the next
895   token or at the terminating NUL character.  */
896extern int getsubopt (char **__restrict __optionp,
897		      char *__const *__restrict __tokens,
898		      char **__restrict __valuep)
899     __THROW __nonnull ((1, 2, 3)) __wur;
900#endif
901
902
903#ifdef __USE_XOPEN
904/* Setup DES tables according KEY.  */
905extern void setkey (__const char *__key) __THROW __nonnull ((1));
906#endif
907
908
909/* X/Open pseudo terminal handling.  */
910
911#ifdef __USE_XOPEN2KXSI
912/* Return a master pseudo-terminal handle.  */
913extern int posix_openpt (int __oflag) __wur;
914#endif
915
916#ifdef __USE_XOPEN
917/* The next four functions all take a master pseudo-tty fd and
918   perform an operation on the associated slave:  */
919
920/* Chown the slave to the calling user.  */
921extern int grantpt (int __fd) __THROW;
922
923/* Release an internal lock so the slave can be opened.
924   Call after grantpt().  */
925extern int unlockpt (int __fd) __THROW;
926
927/* Return the pathname of the pseudo terminal slave assoicated with
928   the master FD is open on, or NULL on errors.
929   The returned storage is good until the next call to this function.  */
930extern char *ptsname (int __fd) __THROW __wur;
931#endif
932
933#ifdef __USE_GNU
934/* Store at most BUFLEN characters of the pathname of the slave pseudo
935   terminal associated with the master FD is open on in BUF.
936   Return 0 on success, otherwise an error number.  */
937extern int ptsname_r (int __fd, char *__buf, size_t __buflen)
938     __THROW __nonnull ((2));
939
940/* Open a master pseudo terminal and return its file descriptor.  */
941extern int getpt (void);
942#endif
943
944#ifdef __USE_BSD
945/* Put the 1 minute, 5 minute and 15 minute load averages into the first
946   NELEM elements of LOADAVG.  Return the number written (never more than
947   three, but may be less than NELEM), or -1 if an error occurred.  */
948extern int getloadavg (double __loadavg[], int __nelem)
949     __THROW __nonnull ((1));
950#endif
951
952
953/* Define some macros helping to catch buffer overflows.  */
954#if __USE_FORTIFY_LEVEL > 0 && defined __extern_always_inline
955# include <bits/stdlib.h>
956#endif
957#ifdef __LDBL_COMPAT
958# include <bits/stdlib-ldbl.h>
959#endif
960
961#endif /* don't just need malloc and calloc */
962#undef __need_malloc_and_calloc
963
964__END_DECLS
965
966#endif /* stdlib.h  */
967