1/* Copyright (C) 1991-2007, 2009 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 _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 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_BSD || defined __USE_XOPEN_EXTENDED
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__BEGIN_NAMESPACE_STD
512/* Abort execution and generate a core-dump.  */
513extern void abort (void) __THROW __attribute__ ((__noreturn__));
514
515
516/* Register a function to be called when `exit' is called.  */
517extern int atexit (void (*__func) (void)) __THROW __nonnull ((1));
518
519#ifdef __USE_GNU
520// XXX There should be a macro to signal with C++ revision is used.
521// XXX This function is in the C++1x revision.
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#ifdef __USE_GNU
546// XXX There should be a macro to signal with C++ revision is used.
547// XXX This function is in the C++1x revision.
548/* Call all functions registered with `at_quick_exit' in the reverse
549   of the order in which they were registered and terminate program
550   execution with STATUS.  */
551extern void quick_exit (int __status) __THROW __attribute__ ((__noreturn__));
552#endif
553__END_NAMESPACE_STD
554
555#ifdef __USE_ISOC99
556__BEGIN_NAMESPACE_C99
557/* Terminate the program with STATUS without calling any of the
558   functions registered with `atexit' or `on_exit'.  */
559extern void _Exit (int __status) __THROW __attribute__ ((__noreturn__));
560__END_NAMESPACE_C99
561#endif
562
563
564__BEGIN_NAMESPACE_STD
565/* Return the value of envariable NAME, or NULL if it doesn't exist.  */
566extern char *getenv (__const char *__name) __THROW __nonnull ((1)) __wur;
567__END_NAMESPACE_STD
568
569/* This function is similar to the above but returns NULL if the
570   programs is running with SUID or SGID enabled.  */
571extern char *__secure_getenv (__const char *__name)
572     __THROW __nonnull ((1)) __wur;
573
574#if defined __USE_SVID || 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#if defined __USE_BSD || defined __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;
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 || defined __USE_XOPEN_EXTENDED
600/* Generate a unique temporary file name from TEMPLATE.
601   The last six characters of TEMPLATE must be "XXXXXX";
602   they are replaced with a string that makes the file name unique.
603   Returns TEMPLATE, or a null pointer if it cannot get a unique file name.  */
604extern char *mktemp (char *__template) __THROW __nonnull ((1)) __wur;
605
606/* Generate a unique temporary file name from TEMPLATE.
607   The last six characters of TEMPLATE must be "XXXXXX";
608   they are replaced with a string that makes the filename unique.
609   Returns a file descriptor open on the file for reading and writing,
610   or -1 if it cannot create a uniquely-named file.
611
612   This function is a possible cancellation point and therefore not
613   marked with __THROW.  */
614# ifndef __USE_FILE_OFFSET64
615extern int mkstemp (char *__template) __nonnull ((1)) __wur;
616# else
617#  ifdef __REDIRECT
618extern int __REDIRECT (mkstemp, (char *__template), mkstemp64)
619     __nonnull ((1)) __wur;
620#  else
621#   define mkstemp mkstemp64
622#  endif
623# endif
624# ifdef __USE_LARGEFILE64
625extern int mkstemp64 (char *__template) __nonnull ((1)) __wur;
626# endif
627#endif
628
629#ifdef __USE_MISC
630/* Similar to mkstemp, but the template can have a suffix after the
631   XXXXXX.  The length of the suffix is specified in the second
632   parameter.
633
634   This function is a possible cancellation point and therefore not
635   marked with __THROW.  */
636# ifndef __USE_FILE_OFFSET64
637extern int mkstemps (char *__template, int __suffixlen) __nonnull ((1)) __wur;
638# else
639#  ifdef __REDIRECT
640extern int __REDIRECT (mkstemps, (char *__template, int __suffixlen),
641		       mkstemps64) __nonnull ((1)) __wur;
642#  else
643#   define mkstemps mkstemps64
644#  endif
645# endif
646# ifdef __USE_LARGEFILE64
647extern int mkstemps64 (char *__template, int __suffixlen)
648     __nonnull ((1)) __wur;
649# endif
650#endif
651
652#if defined __USE_BSD || defined __USE_XOPEN2K8
653/* Create a unique temporary directory from TEMPLATE.
654   The last six characters of TEMPLATE must be "XXXXXX";
655   they are replaced with a string that makes the directory name unique.
656   Returns TEMPLATE, or a null pointer if it cannot get a unique name.
657   The directory is created mode 700.  */
658extern char *mkdtemp (char *__template) __THROW __nonnull ((1)) __wur;
659#endif
660
661#ifdef __USE_GNU
662/* Generate a unique temporary file name from TEMPLATE similar to
663   mkstemp.  But allow the caller to pass additional flags which are
664   used in the open call to create the file..
665
666   This function is a possible cancellation points and therefore not
667   marked with __THROW.  */
668# ifndef __USE_FILE_OFFSET64
669extern int mkostemp (char *__template, int __flags) __nonnull ((1)) __wur;
670# else
671#  ifdef __REDIRECT
672extern int __REDIRECT (mkostemp, (char *__template, int __flags), mkostemp64)
673     __nonnull ((1)) __wur;
674#  else
675#   define mkostemp mkostemp64
676#  endif
677# endif
678# ifdef __USE_LARGEFILE64
679extern int mkostemp64 (char *__template, int __flags) __nonnull ((1)) __wur;
680# endif
681
682/* Similar to mkostemp, but the template can have a suffix after the
683   XXXXXX.  The length of the suffix is specified in the second
684   parameter.
685
686   This function is a possible cancellation point and therefore not
687   marked with __THROW.  */
688# ifndef __USE_FILE_OFFSET64
689extern int mkostemps (char *__template, int __suffixlen, int __flags)
690     __nonnull ((1)) __wur;
691# else
692#  ifdef __REDIRECT
693extern int __REDIRECT (mkostemps, (char *__template, int __suffixlen,
694				   int __flags), mkostemps64)
695     __nonnull ((1)) __wur;
696#  else
697#   define mkostemps mkostemps64
698#  endif
699# endif
700# ifdef __USE_LARGEFILE64
701extern int mkostemps64 (char *__template, int __suffixlen, int __flags)
702     __nonnull ((1)) __wur;
703# endif
704#endif
705
706
707__BEGIN_NAMESPACE_STD
708/* Execute the given line as a shell command.
709
710   This function is a cancellation point and therefore not marked with
711   __THROW.  */
712extern int system (__const char *__command) __wur;
713__END_NAMESPACE_STD
714
715
716#ifdef	__USE_GNU
717/* Return a malloc'd string containing the canonical absolute name of the
718   existing named file.  */
719extern char *canonicalize_file_name (__const char *__name)
720     __THROW __nonnull ((1)) __wur;
721#endif
722
723#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
724/* Return the canonical absolute name of file NAME.  If RESOLVED is
725   null, the result is malloc'd; otherwise, if the canonical name is
726   PATH_MAX chars or more, returns null with `errno' set to
727   ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars,
728   returns the name in RESOLVED.  */
729extern char *realpath (__const char *__restrict __name,
730		       char *__restrict __resolved) __THROW __wur;
731#endif
732
733
734/* Shorthand for type of comparison functions.  */
735#ifndef __COMPAR_FN_T
736# define __COMPAR_FN_T
737typedef int (*__compar_fn_t) (__const void *, __const void *);
738
739# ifdef	__USE_GNU
740typedef __compar_fn_t comparison_fn_t;
741# endif
742#endif
743#ifdef __USE_GNU
744typedef int (*__compar_d_fn_t) (__const void *, __const void *, void *);
745#endif
746
747__BEGIN_NAMESPACE_STD
748/* Do a binary search for KEY in BASE, which consists of NMEMB elements
749   of SIZE bytes each, using COMPAR to perform the comparisons.  */
750extern void *bsearch (__const void *__key, __const void *__base,
751		      size_t __nmemb, size_t __size, __compar_fn_t __compar)
752     __nonnull ((1, 2, 5)) __wur;
753
754/* Sort NMEMB elements of BASE, of SIZE bytes each,
755   using COMPAR to perform the comparisons.  */
756extern void qsort (void *__base, size_t __nmemb, size_t __size,
757		   __compar_fn_t __compar) __nonnull ((1, 4));
758#ifdef __USE_GNU
759extern void qsort_r (void *__base, size_t __nmemb, size_t __size,
760		     __compar_d_fn_t __compar, void *__arg)
761  __nonnull ((1, 4));
762#endif
763
764
765/* Return the absolute value of X.  */
766extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur;
767extern long int labs (long int __x) __THROW __attribute__ ((__const__)) __wur;
768__END_NAMESPACE_STD
769
770#ifdef __USE_ISOC99
771__extension__ extern long long int llabs (long long int __x)
772     __THROW __attribute__ ((__const__)) __wur;
773#endif
774
775
776__BEGIN_NAMESPACE_STD
777/* Return the `div_t', `ldiv_t' or `lldiv_t' representation
778   of the value of NUMER over DENOM. */
779/* GCC may have built-ins for these someday.  */
780extern div_t div (int __numer, int __denom)
781     __THROW __attribute__ ((__const__)) __wur;
782extern ldiv_t ldiv (long int __numer, long int __denom)
783     __THROW __attribute__ ((__const__)) __wur;
784__END_NAMESPACE_STD
785
786#ifdef __USE_ISOC99
787__BEGIN_NAMESPACE_C99
788__extension__ extern lldiv_t lldiv (long long int __numer,
789				    long long int __denom)
790     __THROW __attribute__ ((__const__)) __wur;
791__END_NAMESPACE_C99
792#endif
793
794
795#if defined __USE_SVID || defined __USE_XOPEN_EXTENDED
796/* Convert floating point numbers to strings.  The returned values are
797   valid only until another call to the same function.  */
798
799/* Convert VALUE to a string with NDIGIT digits and return a pointer to
800   this.  Set *DECPT with the position of the decimal character and *SIGN
801   with the sign of the number.  */
802extern char *ecvt (double __value, int __ndigit, int *__restrict __decpt,
803		   int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur;
804
805/* Convert VALUE to a string rounded to NDIGIT decimal digits.  Set *DECPT
806   with the position of the decimal character and *SIGN with the sign of
807   the number.  */
808extern char *fcvt (double __value, int __ndigit, int *__restrict __decpt,
809		   int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur;
810
811/* If possible convert VALUE to a string with NDIGIT significant digits.
812   Otherwise use exponential representation.  The resulting string will
813   be written to BUF.  */
814extern char *gcvt (double __value, int __ndigit, char *__buf)
815     __THROW __nonnull ((3)) __wur;
816
817
818# ifdef __USE_MISC
819/* Long double versions of above functions.  */
820extern char *qecvt (long double __value, int __ndigit,
821		    int *__restrict __decpt, int *__restrict __sign)
822     __THROW __nonnull ((3, 4)) __wur;
823extern char *qfcvt (long double __value, int __ndigit,
824		    int *__restrict __decpt, int *__restrict __sign)
825     __THROW __nonnull ((3, 4)) __wur;
826extern char *qgcvt (long double __value, int __ndigit, char *__buf)
827     __THROW __nonnull ((3)) __wur;
828
829
830/* Reentrant version of the functions above which provide their own
831   buffers.  */
832extern int ecvt_r (double __value, int __ndigit, int *__restrict __decpt,
833		   int *__restrict __sign, char *__restrict __buf,
834		   size_t __len) __THROW __nonnull ((3, 4, 5));
835extern int fcvt_r (double __value, int __ndigit, int *__restrict __decpt,
836		   int *__restrict __sign, char *__restrict __buf,
837		   size_t __len) __THROW __nonnull ((3, 4, 5));
838
839extern int qecvt_r (long double __value, int __ndigit,
840		    int *__restrict __decpt, int *__restrict __sign,
841		    char *__restrict __buf, size_t __len)
842     __THROW __nonnull ((3, 4, 5));
843extern int qfcvt_r (long double __value, int __ndigit,
844		    int *__restrict __decpt, int *__restrict __sign,
845		    char *__restrict __buf, size_t __len)
846     __THROW __nonnull ((3, 4, 5));
847# endif	/* misc */
848#endif	/* use MISC || use X/Open Unix */
849
850
851__BEGIN_NAMESPACE_STD
852/* Return the length of the multibyte character
853   in S, which is no longer than N.  */
854extern int mblen (__const char *__s, size_t __n) __THROW __wur;
855/* Return the length of the given multibyte character,
856   putting its `wchar_t' representation in *PWC.  */
857extern int mbtowc (wchar_t *__restrict __pwc,
858		   __const char *__restrict __s, size_t __n) __THROW __wur;
859/* Put the multibyte character represented
860   by WCHAR in S, returning its length.  */
861extern int wctomb (char *__s, wchar_t __wchar) __THROW __wur;
862
863
864/* Convert a multibyte string to a wide char string.  */
865extern size_t mbstowcs (wchar_t *__restrict  __pwcs,
866			__const char *__restrict __s, size_t __n) __THROW;
867/* Convert a wide char string to multibyte string.  */
868extern size_t wcstombs (char *__restrict __s,
869			__const wchar_t *__restrict __pwcs, size_t __n)
870     __THROW;
871__END_NAMESPACE_STD
872
873
874#ifdef __USE_SVID
875/* Determine whether the string value of RESPONSE matches the affirmation
876   or negative response expression as specified by the LC_MESSAGES category
877   in the program's current locale.  Returns 1 if affirmative, 0 if
878   negative, and -1 if not matching.  */
879extern int rpmatch (__const char *__response) __THROW __nonnull ((1)) __wur;
880#endif
881
882
883#ifdef __USE_XOPEN_EXTENDED
884/* Parse comma separated suboption from *OPTIONP and match against
885   strings in TOKENS.  If found return index and set *VALUEP to
886   optional value introduced by an equal sign.  If the suboption is
887   not part of TOKENS return in *VALUEP beginning of unknown
888   suboption.  On exit *OPTIONP is set to the beginning of the next
889   token or at the terminating NUL character.  */
890extern int getsubopt (char **__restrict __optionp,
891		      char *__const *__restrict __tokens,
892		      char **__restrict __valuep)
893     __THROW __nonnull ((1, 2, 3)) __wur;
894#endif
895
896
897#ifdef __USE_XOPEN
898/* Setup DES tables according KEY.  */
899extern void setkey (__const char *__key) __THROW __nonnull ((1));
900#endif
901
902
903/* X/Open pseudo terminal handling.  */
904
905#ifdef __USE_XOPEN2K
906/* Return a master pseudo-terminal handle.  */
907extern int posix_openpt (int __oflag) __wur;
908#endif
909
910#ifdef __USE_XOPEN
911/* The next four functions all take a master pseudo-tty fd and
912   perform an operation on the associated slave:  */
913
914/* Chown the slave to the calling user.  */
915extern int grantpt (int __fd) __THROW;
916
917/* Release an internal lock so the slave can be opened.
918   Call after grantpt().  */
919extern int unlockpt (int __fd) __THROW;
920
921/* Return the pathname of the pseudo terminal slave assoicated with
922   the master FD is open on, or NULL on errors.
923   The returned storage is good until the next call to this function.  */
924extern char *ptsname (int __fd) __THROW __wur;
925#endif
926
927#ifdef __USE_GNU
928/* Store at most BUFLEN characters of the pathname of the slave pseudo
929   terminal associated with the master FD is open on in BUF.
930   Return 0 on success, otherwise an error number.  */
931extern int ptsname_r (int __fd, char *__buf, size_t __buflen)
932     __THROW __nonnull ((2));
933
934/* Open a master pseudo terminal and return its file descriptor.  */
935extern int getpt (void);
936#endif
937
938#ifdef __USE_BSD
939/* Put the 1 minute, 5 minute and 15 minute load averages into the first
940   NELEM elements of LOADAVG.  Return the number written (never more than
941   three, but may be less than NELEM), or -1 if an error occurred.  */
942extern int getloadavg (double __loadavg[], int __nelem)
943     __THROW __nonnull ((1));
944#endif
945
946
947/* Define some macros helping to catch buffer overflows.  */
948#if __USE_FORTIFY_LEVEL > 0 && defined __extern_always_inline
949# include <bits/stdlib.h>
950#endif
951#ifdef __LDBL_COMPAT
952# include <bits/stdlib-ldbl.h>
953#endif
954
955#endif /* don't just need malloc and calloc */
956#undef __need_malloc_and_calloc
957
958__END_DECLS
959
960#endif /* stdlib.h  */
961