1/* Copyright (C) 1991-99,2000,01,02 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#include <stdint.h>
35
36__BEGIN_DECLS
37
38#ifndef __need_malloc_and_calloc
39#define	_STDLIB_H	1
40
41#if defined __USE_XOPEN && !defined _SYS_WAIT_H
42/* XPG requires a few symbols from <sys/wait.h> being defined.  */
43# include <bits/waitflags.h>
44# include <bits/waitstatus.h>
45
46# ifdef __USE_BSD
47
48/* Lots of hair to allow traditional BSD use of `union wait'
49   as well as POSIX.1 use of `int' for the status word.  */
50
51#  if defined __GNUC__ && !defined __cplusplus
52#   define __WAIT_INT(status)						      \
53  (__extension__ ({ union { __typeof(status) __in; int __i; } __u;	      \
54		    __u.__in = (status); __u.__i; }))
55#  else
56#   define __WAIT_INT(status)	(*(int *) &(status))
57#  endif
58
59/* This is the type of the argument to `wait'.  The funky union
60   causes redeclarations with ether `int *' or `union wait *' to be
61   allowed without complaint.  __WAIT_STATUS_DEFN is the type used in
62   the actual function definitions.  */
63
64#  if !defined __GNUC__ || __GNUC__ < 2 || defined __cplusplus
65#   define __WAIT_STATUS	void *
66#   define __WAIT_STATUS_DEFN	void *
67#  else
68/* This works in GCC 2.6.1 and later.  */
69typedef union
70  {
71    union wait *__uptr;
72    int *__iptr;
73  } __WAIT_STATUS __attribute__ ((__transparent_union__));
74#   define __WAIT_STATUS_DEFN	int *
75#  endif
76
77# else /* Don't use BSD.  */
78
79#  define __WAIT_INT(status)	(status)
80#  define __WAIT_STATUS		int *
81#  define __WAIT_STATUS_DEFN	int *
82
83# endif /* Use BSD.  */
84
85/* Define the macros <sys/wait.h> also would define this way.  */
86# define WEXITSTATUS(status)	__WEXITSTATUS(__WAIT_INT(status))
87# define WTERMSIG(status)	__WTERMSIG(__WAIT_INT(status))
88# define WSTOPSIG(status)	__WSTOPSIG(__WAIT_INT(status))
89# define WIFEXITED(status)	__WIFEXITED(__WAIT_INT(status))
90# define WIFSIGNALED(status)	__WIFSIGNALED(__WAIT_INT(status))
91# define WIFSTOPPED(status)	__WIFSTOPPED(__WAIT_INT(status))
92#endif	/* X/Open and <sys/wait.h> not included.  */
93
94__BEGIN_NAMESPACE_STD
95/* Returned by `div'.  */
96typedef struct
97  {
98    int quot;			/* Quotient.  */
99    int rem;			/* Remainder.  */
100  } div_t;
101
102/* Returned by `ldiv'.  */
103#ifndef __ldiv_t_defined
104typedef struct
105  {
106    long int quot;		/* Quotient.  */
107    long int rem;		/* Remainder.  */
108  } ldiv_t;
109# define __ldiv_t_defined	1
110#endif
111__END_NAMESPACE_STD
112
113#if defined __USE_ISOC99 && !defined __lldiv_t_defined
114__BEGIN_NAMESPACE_C99
115/* Returned by `lldiv'.  */
116__extension__ typedef struct
117  {
118    long long int quot;		/* Quotient.  */
119    long long int rem;		/* Remainder.  */
120  } lldiv_t;
121# define __lldiv_t_defined	1
122__END_NAMESPACE_C99
123#endif
124
125
126/* The largest number rand will return (same as INT_MAX).  */
127#define	RAND_MAX	2147483647
128
129
130/* We define these the same for all machines.
131   Changes from this to the outside world should be done in `_exit'.  */
132#define	EXIT_FAILURE	1	/* Failing exit status.  */
133#define	EXIT_SUCCESS	0	/* Successful exit status.  */
134
135
136/* Maximum length of a multibyte character in the current locale.  */
137#define	MB_CUR_MAX	(__ctype_get_mb_cur_max ())
138extern unsigned short __ctype_get_mb_cur_max(void);
139
140
141__BEGIN_NAMESPACE_STD
142/* Convert a string to a floating-point number.  */
143extern double atof (__const char *__nptr) __THROW __attribute_pure__;
144/* Convert a string to an integer.  */
145extern int atoi (__const char *__nptr) __THROW __attribute_pure__;
146/* Convert a string to a long integer.  */
147extern long int atol (__const char *__nptr) __THROW __attribute_pure__;
148__END_NAMESPACE_STD
149
150#if defined __USE_ISOC99 || (defined __GLIBC_HAVE_LONG_LONG && defined __USE_MISC)
151__BEGIN_NAMESPACE_C99
152/* Convert a string to a long long integer.  */
153__extension__ extern long long int atoll (__const char *__nptr)
154     __THROW __attribute_pure__;
155__END_NAMESPACE_C99
156#endif
157
158__BEGIN_NAMESPACE_STD
159/* Convert a string to a floating-point number.  */
160extern double strtod (__const char *__restrict __nptr,
161		      char **__restrict __endptr) __THROW;
162__END_NAMESPACE_STD
163
164#ifdef	__USE_ISOC99
165__BEGIN_NAMESPACE_C99
166/* Likewise for `float' and `long double' sizes of floating-point numbers.  */
167extern float strtof (__const char *__restrict __nptr,
168		     char **__restrict __endptr) __THROW;
169
170extern long double strtold (__const char *__restrict __nptr,
171			    char **__restrict __endptr) __THROW;
172__END_NAMESPACE_C99
173#endif
174
175__BEGIN_NAMESPACE_STD
176/* Convert a string to a long integer.  */
177extern long int strtol (__const char *__restrict __nptr,
178			char **__restrict __endptr, int __base) __THROW;
179/* Convert a string to an unsigned long integer.  */
180extern unsigned long int strtoul (__const char *__restrict __nptr,
181				  char **__restrict __endptr, int __base)
182     __THROW;
183__END_NAMESPACE_C99
184
185#if defined __GLIBC_HAVE_LONG_LONG && defined __USE_BSD
186/* Convert a string to a quadword integer.  */
187__extension__
188extern long long int strtoq (__const char *__restrict __nptr,
189			     char **__restrict __endptr, int __base) __THROW;
190/* Convert a string to an unsigned quadword integer.  */
191__extension__
192extern unsigned long long int strtouq (__const char *__restrict __nptr,
193				       char **__restrict __endptr, int __base)
194     __THROW;
195#endif /* GCC and use BSD.  */
196
197#if defined __USE_ISOC99 || (defined __GLIBC_HAVE_LONG_LONG && defined __USE_MISC)
198__BEGIN_NAMESPACE_C99
199/* Convert a string to a quadword integer.  */
200__extension__
201extern long long int strtoll (__const char *__restrict __nptr,
202			      char **__restrict __endptr, int __base) __THROW;
203/* Convert a string to an unsigned quadword integer.  */
204__extension__
205extern unsigned long long int strtoull (__const char *__restrict __nptr,
206					char **__restrict __endptr, int __base)
207     __THROW;
208__END_NAMESPACE_C99
209#endif /* ISO C99 or GCC and use MISC.  */
210
211
212#ifdef __USE_GNU
213/* The concept of one static locale per category is not very well
214   thought out.  Many applications will need to process its data using
215   information from several different locales.  Another application is
216   the implementation of the internationalization handling in the
217   upcoming ISO C++ standard library.  To support this another set of
218   the functions using locale data exist which have an additional
219   argument.
220
221   Attention: all these functions are *not* standardized in any form.
222   This is a proof-of-concept implementation.  */
223
224/* Structure for reentrant locale using functions.  This is an
225   (almost) opaque type for the user level programs.  */
226# include <xlocale.h>
227
228/* Special versions of the functions above which take the locale to
229   use as an additional parameter.  */
230extern long int strtol_l (__const char *__restrict __nptr,
231			  char **__restrict __endptr, int __base,
232			  __locale_t __loc) __THROW;
233
234extern unsigned long int strtoul_l (__const char *__restrict __nptr,
235				    char **__restrict __endptr,
236				    int __base, __locale_t __loc) __THROW;
237
238__extension__
239extern long long int strtoll_l (__const char *__restrict __nptr,
240				char **__restrict __endptr, int __base,
241				__locale_t __loc) __THROW;
242
243__extension__
244extern unsigned long long int strtoull_l (__const char *__restrict __nptr,
245					  char **__restrict __endptr,
246					  int __base, __locale_t __loc)
247     __THROW;
248
249extern double strtod_l (__const char *__restrict __nptr,
250			char **__restrict __endptr, __locale_t __loc)
251     __THROW;
252
253extern float strtof_l (__const char *__restrict __nptr,
254		       char **__restrict __endptr, __locale_t __loc) __THROW;
255
256extern long double strtold_l (__const char *__restrict __nptr,
257			      char **__restrict __endptr,
258			      __locale_t __loc) __THROW;
259#endif /* GNU */
260
261
262/* The internal entry points for `strtoX' take an extra flag argument
263   saying whether or not to parse locale-dependent number grouping.  */
264
265extern double __strtod_internal (__const char *__restrict __nptr,
266				 char **__restrict __endptr, int __group)
267     __THROW;
268extern float __strtof_internal (__const char *__restrict __nptr,
269				char **__restrict __endptr, int __group)
270     __THROW;
271extern long double __strtold_internal (__const char *__restrict __nptr,
272				       char **__restrict __endptr,
273				       int __group) __THROW;
274#ifndef __strtol_internal_defined
275extern long int __strtol_internal (__const char *__restrict __nptr,
276				   char **__restrict __endptr,
277				   int __base, int __group) __THROW;
278# define __strtol_internal_defined	1
279#endif
280#ifndef __strtoul_internal_defined
281extern unsigned long int __strtoul_internal (__const char *__restrict __nptr,
282					     char **__restrict __endptr,
283					     int __base, int __group) __THROW;
284# define __strtoul_internal_defined	1
285#endif
286#if defined __GNUC__ || defined __USE_ISOC99
287# ifndef __strtoll_internal_defined
288__extension__
289extern long long int __strtoll_internal (__const char *__restrict __nptr,
290					 char **__restrict __endptr,
291					 int __base, int __group) __THROW;
292#  define __strtoll_internal_defined	1
293# endif
294# ifndef __strtoull_internal_defined
295__extension__
296extern unsigned long long int __strtoull_internal (__const char *
297						   __restrict __nptr,
298						   char **__restrict __endptr,
299						   int __base, int __group)
300     __THROW;
301#  define __strtoull_internal_defined	1
302# endif
303#endif /* GCC */
304
305#ifdef __USE_EXTERN_INLINES
306/* Define inline functions which call the internal entry points.  */
307
308__BEGIN_NAMESPACE_STD
309__extern_inline double
310strtod (__const char *__restrict __nptr, char **__restrict __endptr) __THROW
311{
312  return __strtod_internal (__nptr, __endptr, 0);
313}
314__extern_inline long int
315strtol (__const char *__restrict __nptr, char **__restrict __endptr,
316	int __base) __THROW
317{
318  return __strtol_internal (__nptr, __endptr, __base, 0);
319}
320__extern_inline unsigned long int
321strtoul (__const char *__restrict __nptr, char **__restrict __endptr,
322	 int __base) __THROW
323{
324  return __strtoul_internal (__nptr, __endptr, __base, 0);
325}
326__END_NAMESPACE_STD
327
328# ifdef __USE_ISOC99
329__BEGIN_NAMESPACE_C99
330__extern_inline float
331strtof (__const char *__restrict __nptr, char **__restrict __endptr) __THROW
332{
333  return __strtof_internal (__nptr, __endptr, 0);
334}
335__extern_inline long double
336strtold (__const char *__restrict __nptr, char **__restrict __endptr) __THROW
337{
338  return __strtold_internal (__nptr, __endptr, 0);
339}
340__END_NAMESPACE_C99
341# endif
342
343# ifdef __USE_BSD
344__extension__ __extern_inline long long int
345strtoq (__const char *__restrict __nptr, char **__restrict __endptr,
346	int __base) __THROW
347{
348  return __strtoll_internal (__nptr, __endptr, __base, 0);
349}
350__extension__ __extern_inline unsigned long long int
351strtouq (__const char *__restrict __nptr, char **__restrict __endptr,
352	 int __base) __THROW
353{
354  return __strtoull_internal (__nptr, __endptr, __base, 0);
355}
356# endif
357
358# if defined __USE_MISC || defined __USE_ISOC99
359__BEGIN_NAMESPACE_C99
360__extension__ __extern_inline long long int
361strtoll (__const char *__restrict __nptr, char **__restrict __endptr,
362	 int __base) __THROW
363{
364  return __strtoll_internal (__nptr, __endptr, __base, 0);
365}
366__extension__ __extern_inline unsigned long long int
367strtoull (__const char * __restrict __nptr, char **__restrict __endptr,
368	  int __base) __THROW
369{
370  return __strtoull_internal (__nptr, __endptr, __base, 0);
371}
372__END_NAMESPACE_C99
373# endif
374
375__BEGIN_NAMESPACE_STD
376__extern_inline double
377atof (__const char *__nptr) __THROW
378{
379  return strtod (__nptr, (char **) NULL);
380}
381__extern_inline int
382atoi (__const char *__nptr) __THROW
383{
384  return (int) strtol (__nptr, (char **) NULL, 10);
385}
386__extern_inline long int
387atol (__const char *__nptr) __THROW
388{
389  return strtol (__nptr, (char **) NULL, 10);
390}
391__END_NAMESPACE_STD
392
393# if defined __USE_MISC || defined __USE_ISOC99
394__BEGIN_NAMESPACE_C99
395__extension__ __extern_inline long long int
396atoll (__const char *__nptr) __THROW
397{
398  return strtoll (__nptr, (char **) NULL, 10);
399}
400__END_NAMESPACE_C99
401# endif
402#endif /* Optimizing and Inlining.  */
403
404
405#if defined __USE_SVID || defined __USE_XOPEN_EXTENDED
406/* Convert N to base 64 using the digits "./0-9A-Za-z", least-significant
407   digit first.  Returns a pointer to static storage overwritten by the
408   next call.  */
409extern char *l64a (long int __n) __THROW;
410
411/* Read a number from a string S in base 64 as above.  */
412extern long int a64l (__const char *__s) __THROW __attribute_pure__;
413
414#endif	/* Use SVID || extended X/Open.  */
415
416#if defined __USE_SVID || defined __USE_XOPEN_EXTENDED || defined __USE_BSD
417# include <sys/types.h>	/* we need int32_t... */
418
419/* These are the functions that actually do things.  The `random', `srandom',
420   `initstate' and `setstate' functions are those from BSD Unices.
421   The `rand' and `srand' functions are required by the ANSI standard.
422   We provide both interfaces to the same random number generator.  */
423/* Return a random long integer between 0 and RAND_MAX inclusive.  */
424extern long int random (void) __THROW;
425
426/* Seed the random number generator with the given number.  */
427extern void srandom (unsigned int __seed) __THROW;
428
429/* Initialize the random number generator to use state buffer STATEBUF,
430   of length STATELEN, and seed it with SEED.  Optimal lengths are 8, 16,
431   32, 64, 128 and 256, the bigger the better; values less than 8 will
432   cause an error and values greater than 256 will be rounded down.  */
433extern char *initstate (unsigned int __seed, char *__statebuf,
434			size_t __statelen) __THROW;
435
436/* Switch the random number generator to state buffer STATEBUF,
437   which should have been previously initialized by `initstate'.  */
438extern char *setstate (char *__statebuf) __THROW;
439
440
441# ifdef __USE_MISC
442/* Reentrant versions of the `random' family of functions.
443   These functions all use the following data structure to contain
444   state, rather than global state variables.  */
445
446struct random_data
447  {
448    int32_t *fptr;		/* Front pointer.  */
449    int32_t *rptr;		/* Rear pointer.  */
450    int32_t *state;		/* Array of state values.  */
451    int rand_type;		/* Type of random number generator.  */
452    int rand_deg;		/* Degree of random number generator.  */
453    int rand_sep;		/* Distance between front and rear.  */
454    int32_t *end_ptr;		/* Pointer behind state table.  */
455  };
456
457extern int random_r (struct random_data *__restrict __buf,
458		     int32_t *__restrict __result) __THROW;
459
460extern int srandom_r (unsigned int __seed, struct random_data *__buf) __THROW;
461
462extern int initstate_r (unsigned int __seed, char *__restrict __statebuf,
463			size_t __statelen,
464			struct random_data *__restrict __buf) __THROW;
465
466extern int setstate_r (char *__restrict __statebuf,
467		       struct random_data *__restrict __buf) __THROW;
468# endif	/* Use misc.  */
469#endif	/* Use SVID || extended X/Open || BSD. */
470
471
472__BEGIN_NAMESPACE_STD
473/* Return a random integer between 0 and RAND_MAX inclusive.  */
474extern int rand (void) __THROW;
475/* Seed the random number generator with the given number.  */
476extern void srand (unsigned int __seed) __THROW;
477__END_NAMESPACE_STD
478
479#ifdef __USE_POSIX
480/* Reentrant interface according to POSIX.1.  */
481extern int rand_r (unsigned int *__seed) __THROW;
482#endif
483
484
485#if defined __USE_SVID || defined __USE_XOPEN
486/* System V style 48-bit random number generator functions.  */
487
488/* Return non-negative, double-precision floating-point value in [0.0,1.0).  */
489extern double drand48 (void) __THROW;
490extern double erand48 (unsigned short int __xsubi[3]) __THROW;
491
492/* Return non-negative, long integer in [0,2^31).  */
493extern long int lrand48 (void) __THROW;
494extern long int nrand48 (unsigned short int __xsubi[3]) __THROW;
495
496/* Return signed, long integers in [-2^31,2^31).  */
497extern long int mrand48 (void) __THROW;
498extern long int jrand48 (unsigned short int __xsubi[3]) __THROW;
499
500/* Seed random number generator.  */
501extern void srand48 (long int __seedval) __THROW;
502extern unsigned short int *seed48 (unsigned short int __seed16v[3]) __THROW;
503extern void lcong48 (unsigned short int __param[7]) __THROW;
504
505# ifdef __USE_MISC
506/* Data structure for communication with thread safe versions.  This
507   type is to be regarded as opaque.  It's only exported because users
508   have to allocate objects of this type.  */
509struct drand48_data
510  {
511    unsigned short int __x[3];	/* Current state.  */
512    unsigned short int __old_x[3]; /* Old state.  */
513    unsigned short int __c;	/* Additive const. in congruential formula.  */
514    unsigned short int __init;	/* Flag for initializing.  */
515    unsigned long long int __a;	/* Factor in congruential formula.  */
516  };
517
518/* Return non-negative, double-precision floating-point value in [0.0,1.0).  */
519extern int drand48_r (struct drand48_data *__restrict __buffer,
520		      double *__restrict __result) __THROW;
521extern int erand48_r (unsigned short int __xsubi[3],
522		      struct drand48_data *__restrict __buffer,
523		      double *__restrict __result) __THROW;
524
525/* Return non-negative, long integer in [0,2^31).  */
526extern int lrand48_r (struct drand48_data *__restrict __buffer,
527		      long int *__restrict __result) __THROW;
528extern int nrand48_r (unsigned short int __xsubi[3],
529		      struct drand48_data *__restrict __buffer,
530		      long int *__restrict __result) __THROW;
531
532/* Return signed, long integers in [-2^31,2^31).  */
533extern int mrand48_r (struct drand48_data *__restrict __buffer,
534		      long int *__restrict __result) __THROW;
535extern int jrand48_r (unsigned short int __xsubi[3],
536		      struct drand48_data *__restrict __buffer,
537		      long int *__restrict __result) __THROW;
538
539/* Seed random number generator.  */
540extern int srand48_r (long int __seedval, struct drand48_data *__buffer)
541     __THROW;
542
543extern int seed48_r (unsigned short int __seed16v[3],
544		     struct drand48_data *__buffer) __THROW;
545
546extern int lcong48_r (unsigned short int __param[7],
547		      struct drand48_data *__buffer) __THROW;
548# endif	/* Use misc.  */
549#endif	/* Use SVID or X/Open.  */
550
551#endif /* don't just need malloc and calloc */
552
553#ifndef __malloc_and_calloc_defined
554# define __malloc_and_calloc_defined
555__BEGIN_NAMESPACE_STD
556/* Allocate SIZE bytes of memory.  */
557extern void *malloc (size_t __size) __THROW __attribute_malloc__;
558/* Allocate NMEMB elements of SIZE bytes each, all initialized to 0.  */
559extern void *calloc (size_t __nmemb, size_t __size)
560     __THROW __attribute_malloc__;
561__END_NAMESPACE_STD
562#endif
563
564#ifndef __need_malloc_and_calloc
565__BEGIN_NAMESPACE_STD
566/* Re-allocate the previously allocated block
567   in PTR, making the new block SIZE bytes long.  */
568extern void *realloc (void *__ptr, size_t __size) __THROW __attribute_malloc__;
569/* Free a block allocated by `malloc', `realloc' or `calloc'.  */
570extern void free (void *__ptr) __THROW;
571__END_NAMESPACE_STD
572
573#ifdef	__USE_MISC
574/* Free a block.  An alias for `free'.	(Sun Unices).  */
575extern void cfree (void *__ptr) __THROW;
576#endif /* Use misc.  */
577
578#if defined __USE_GNU || defined __USE_BSD || defined __USE_MISC
579# include <alloca.h>
580#endif /* Use GNU, BSD, or misc.  */
581
582#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
583/* Allocate SIZE bytes on a page boundary.  The storage cannot be freed.  */
584extern void *valloc (size_t __size) __THROW __attribute_malloc__;
585#endif
586
587#ifdef __USE_XOPEN2K
588/* Allocate memory of SIZE bytes with an alignment of ALIGNMENT.  */
589extern int posix_memalign (void **__memptr, size_t __alignment, size_t __size)
590     __THROW __attribute_malloc__;
591#endif
592
593__BEGIN_NAMESPACE_STD
594/* Abort execution and generate a core-dump.  */
595extern void abort (void) __THROW __attribute__ ((__noreturn__));
596
597
598/* Register a function to be called when `exit' is called.  */
599extern int atexit (void (*__func) (void)) __THROW;
600__END_NAMESPACE_STD
601
602#ifdef	__USE_MISC
603/* Register a function to be called with the status
604   given to `exit' and the given argument.  */
605extern int on_exit (void (*__func) (int __status, void *__arg), void *__arg)
606     __THROW;
607#endif
608
609__BEGIN_NAMESPACE_STD
610/* Call all functions registered with `atexit' and `on_exit',
611   in the reverse of the order in which they were registered
612   perform stdio cleanup, and terminate program execution with STATUS.  */
613extern void exit (int __status) __THROW __attribute__ ((__noreturn__));
614__END_NAMESPACE_STD
615
616#ifdef __USE_ISOC99
617__BEGIN_NAMESPACE_C99
618/* Terminate the program with STATUS without calling any of the
619   functions registered with `atexit' or `on_exit'.  */
620extern void _Exit (int __status) __THROW __attribute__ ((__noreturn__));
621__END_NAMESPACE_C99
622#endif
623
624
625__BEGIN_NAMESPACE_STD
626/* Return the value of envariable NAME, or NULL if it doesn't exist.  */
627extern char *getenv (__const char *__name) __THROW;
628__END_NAMESPACE_STD
629
630/* This function is similar to the above but returns NULL if the
631   programs is running with SUID or SGID enabled.  */
632extern char *__secure_getenv (__const char *__name) __THROW;
633
634#if defined __USE_SVID || defined __USE_XOPEN
635/* The SVID says this is in <stdio.h>, but this seems a better place.	*/
636/* Put STRING, which is of the form "NAME=VALUE", in the environment.
637   If there is no `=', remove NAME from the environment.  */
638extern int putenv (char *__string) __THROW;
639#endif
640
641#if defined __USE_BSD || defined __USE_XOPEN2K
642/* Set NAME to VALUE in the environment.
643   If REPLACE is nonzero, overwrite an existing value.  */
644extern int setenv (__const char *__name, __const char *__value, int __replace)
645     __THROW;
646
647/* Remove the variable NAME from the environment.  */
648extern int unsetenv (__const char *__name) __THROW;
649#endif
650
651#ifdef	__USE_MISC
652/* The `clearenv' was planned to be added to POSIX.1 but probably
653   never made it.  Nevertheless the POSIX.9 standard (POSIX bindings
654   for Fortran 77) requires this function.  */
655extern int clearenv (void) __THROW;
656#endif
657
658
659#if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
660/* Generate a unique temporary file name from TEMPLATE.
661   The last six characters of TEMPLATE must be "XXXXXX";
662   they are replaced with a string that makes the file name unique.
663   Returns TEMPLATE, or a null pointer if it cannot get a unique file name.  */
664extern char *mktemp (char *__template) __THROW;
665
666/* Generate a unique temporary file name from TEMPLATE.
667   The last six characters of TEMPLATE must be "XXXXXX";
668   they are replaced with a string that makes the filename unique.
669   Returns a file descriptor open on the file for reading and writing,
670   or -1 if it cannot create a uniquely-named file.  */
671# ifndef __USE_FILE_OFFSET64
672extern int mkstemp (char *__template) __THROW;
673# else
674#  ifdef __REDIRECT
675extern int __REDIRECT (mkstemp, (char *__template) __THROW, mkstemp64);
676#  else
677#   define mkstemp mkstemp64
678#  endif
679# endif
680# ifdef __USE_LARGEFILE64
681extern int mkstemp64 (char *__template) __THROW;
682# endif
683#endif
684
685#ifdef __USE_BSD
686/* Create a unique temporary directory from TEMPLATE.
687   The last six characters of TEMPLATE must be "XXXXXX";
688   they are replaced with a string that makes the directory name unique.
689   Returns TEMPLATE, or a null pointer if it cannot get a unique name.
690   The directory is created mode 700.  */
691extern char *mkdtemp (char *__template) __THROW;
692#endif
693
694
695__BEGIN_NAMESPACE_STD
696/* Execute the given line as a shell command.  */
697extern int system (__const char *__command) __THROW;
698__END_NAMESPACE_STD
699
700
701#ifdef	__USE_GNU
702/* Return a malloc'd string containing the canonical absolute name of the
703   named file.  The last file name component need not exist, and may be a
704   symlink to a nonexistent file.  */
705extern char *canonicalize_file_name (__const char *__name) __THROW;
706#endif
707
708#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
709/* Return the canonical absolute name of file NAME.  The last file name
710   component need not exist, and may be a symlink to a nonexistent file.
711   If RESOLVED is null, the result is malloc'd; otherwise, if the canonical
712   name is PATH_MAX chars or more, returns null with `errno' set to
713   ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars, returns the
714   name in RESOLVED.  */
715extern char *realpath (__const char *__restrict __name,
716		       char *__restrict __resolved) __THROW;
717#endif
718
719
720/* Shorthand for type of comparison functions.  */
721#ifndef __COMPAR_FN_T
722# define __COMPAR_FN_T
723typedef int (*__compar_fn_t) (__const void *, __const void *);
724
725# ifdef	__USE_GNU
726typedef __compar_fn_t comparison_fn_t;
727# endif
728#endif
729
730__BEGIN_NAMESPACE_STD
731/* Do a binary search for KEY in BASE, which consists of NMEMB elements
732   of SIZE bytes each, using COMPAR to perform the comparisons.  */
733extern void *bsearch (__const void *__key, __const void *__base,
734		      size_t __nmemb, size_t __size, __compar_fn_t __compar);
735
736/* Sort NMEMB elements of BASE, of SIZE bytes each,
737   using COMPAR to perform the comparisons.  */
738extern void qsort (void *__base, size_t __nmemb, size_t __size,
739		   __compar_fn_t __compar);
740
741
742/* Return the absolute value of X.  */
743extern int abs (int __x) __THROW __attribute__ ((__const__));
744extern long int labs (long int __x) __THROW __attribute__ ((__const__));
745__END_NAMESPACE_STD
746
747#ifdef __USE_ISOC99
748__extension__ extern long long int llabs (long long int __x)
749     __THROW __attribute__ ((__const__));
750#endif
751
752
753__BEGIN_NAMESPACE_STD
754/* Return the `div_t', `ldiv_t' or `lldiv_t' representation
755   of the value of NUMER over DENOM. */
756/* GCC may have built-ins for these someday.  */
757extern div_t div (int __numer, int __denom)
758     __THROW __attribute__ ((__const__));
759extern ldiv_t ldiv (long int __numer, long int __denom)
760     __THROW __attribute__ ((__const__));
761__END_NAMESPACE_STD
762
763#ifdef __USE_ISOC99
764__BEGIN_NAMESPACE_C99
765__extension__ extern lldiv_t lldiv (long long int __numer,
766				    long long int __denom)
767     __THROW __attribute__ ((__const__));
768__END_NAMESPACE_C99
769#endif
770
771
772#if defined __USE_SVID || defined __USE_XOPEN_EXTENDED
773/* Convert floating point numbers to strings.  The returned values are
774   valid only until another call to the same function.  */
775
776/* Convert VALUE to a string with NDIGIT digits and return a pointer to
777   this.  Set *DECPT with the position of the decimal character and *SIGN
778   with the sign of the number.  */
779extern char *ecvt (double __value, int __ndigit, int *__restrict __decpt,
780		   int *__restrict __sign) __THROW;
781
782/* Convert VALUE to a string rounded to NDIGIT decimal digits.  Set *DECPT
783   with the position of the decimal character and *SIGN with the sign of
784   the number.  */
785extern char *fcvt (double __value, int __ndigit, int *__restrict __decpt,
786		   int *__restrict __sign) __THROW;
787
788/* If possible convert VALUE to a string with NDIGIT significant digits.
789   Otherwise use exponential representation.  The resulting string will
790   be written to BUF.  */
791extern char *gcvt (double __value, int __ndigit, char *__buf) __THROW;
792
793
794# ifdef __USE_MISC
795/* Long double versions of above functions.  */
796extern char *qecvt (long double __value, int __ndigit,
797		    int *__restrict __decpt, int *__restrict __sign) __THROW;
798extern char *qfcvt (long double __value, int __ndigit,
799		    int *__restrict __decpt, int *__restrict __sign) __THROW;
800extern char *qgcvt (long double __value, int __ndigit, char *__buf) __THROW;
801
802
803/* Reentrant version of the functions above which provide their own
804   buffers.  */
805extern int ecvt_r (double __value, int __ndigit, int *__restrict __decpt,
806		   int *__restrict __sign, char *__restrict __buf,
807		   size_t __len) __THROW;
808extern int fcvt_r (double __value, int __ndigit, int *__restrict __decpt,
809		   int *__restrict __sign, char *__restrict __buf,
810		   size_t __len) __THROW;
811
812extern int qecvt_r (long double __value, int __ndigit,
813		    int *__restrict __decpt, int *__restrict __sign,
814		    char *__restrict __buf, size_t __len) __THROW;
815extern int qfcvt_r (long double __value, int __ndigit,
816		    int *__restrict __decpt, int *__restrict __sign,
817		    char *__restrict __buf, size_t __len) __THROW;
818# endif	/* misc */
819#endif	/* use MISC || use X/Open Unix */
820
821
822__BEGIN_NAMESPACE_STD
823/* Return the length of the multibyte character
824   in S, which is no longer than N.  */
825extern int mblen (__const char *__s, size_t __n) __THROW;
826/* Return the length of the given multibyte character,
827   putting its `wchar_t' representation in *PWC.  */
828extern int mbtowc (wchar_t *__restrict __pwc,
829		   __const char *__restrict __s, size_t __n) __THROW;
830/* Put the multibyte character represented
831   by WCHAR in S, returning its length.  */
832extern int wctomb (char *__s, wchar_t __wchar) __THROW;
833
834
835/* Convert a multibyte string to a wide char string.  */
836extern size_t mbstowcs (wchar_t *__restrict  __pwcs,
837			__const char *__restrict __s, size_t __n) __THROW;
838/* Convert a wide char string to multibyte string.  */
839extern size_t wcstombs (char *__restrict __s,
840			__const wchar_t *__restrict __pwcs, size_t __n)
841     __THROW;
842__END_NAMESPACE_STD
843
844
845#ifdef __USE_SVID
846/* Determine whether the string value of RESPONSE matches the affirmation
847   or negative response expression as specified by the LC_MESSAGES category
848   in the program's current locale.  Returns 1 if affirmative, 0 if
849   negative, and -1 if not matching.  */
850extern int rpmatch (__const char *__response) __THROW;
851#endif
852
853
854#ifdef __USE_XOPEN_EXTENDED
855/* Parse comma separated suboption from *OPTIONP and match against
856   strings in TOKENS.  If found return index and set *VALUEP to
857   optional value introduced by an equal sign.  If the suboption is
858   not part of TOKENS return in *VALUEP beginning of unknown
859   suboption.  On exit *OPTIONP is set to the beginning of the next
860   token or at the terminating NUL character.  */
861extern int getsubopt (char **__restrict __optionp,
862		      char *__const *__restrict __tokens,
863		      char **__restrict __valuep) __THROW;
864#endif
865
866
867#ifdef __USE_XOPEN
868/* Setup DES tables according KEY.  */
869extern void setkey (__const char *__key) __THROW;
870#endif
871
872
873/* X/Open pseudo terminal handling.  */
874
875#ifdef __USE_XOPEN2K
876/* Return a master pseudo-terminal handle.  */
877extern int posix_openpt (int __oflag) __THROW;
878#endif
879
880#ifdef __USE_XOPEN
881/* The next four functions all take a master pseudo-tty fd and
882   perform an operation on the associated slave:  */
883
884/* Chown the slave to the calling user.  */
885extern int grantpt (int __fd) __THROW;
886
887/* Release an internal lock so the slave can be opened.
888   Call after grantpt().  */
889extern int unlockpt (int __fd) __THROW;
890
891/* Return the pathname of the pseudo terminal slave assoicated with
892   the master FD is open on, or NULL on errors.
893   The returned storage is good until the next call to this function.  */
894extern char *ptsname (int __fd) __THROW;
895#endif
896
897#ifdef __USE_GNU
898/* Store at most BUFLEN characters of the pathname of the slave pseudo
899   terminal associated with the master FD is open on in BUF.
900   Return 0 on success, otherwise an error number.  */
901extern int ptsname_r (int __fd, char *__buf, size_t __buflen) __THROW;
902
903/* Open a master pseudo terminal and return its file descriptor.  */
904extern int getpt (void) __THROW;
905#endif
906
907#ifdef __USE_BSD
908/* Put the 1 minute, 5 minute and 15 minute load averages into the first
909   NELEM elements of LOADAVG.  Return the number written (never more than
910   three, but may be less than NELEM), or -1 if an error occurred.  */
911extern int getloadavg (double __loadavg[], int __nelem) __THROW;
912#endif
913
914#endif /* don't just need malloc and calloc */
915#undef __need_malloc_and_calloc
916
917__END_DECLS
918
919#endif /* stdlib.h  */
920