1 /* Copyright (C) 1991-2003, 2004, 2005 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
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
20 * ISO C99 Standard: 7.20 General utilities <stdlib.h>
27 /* Get size_t, wchar_t and NULL from <stddef.h>. */
29 #ifndef __need_malloc_and_calloc
30 # ifdef __UCLIBC_HAS_WCHAR__
31 # define __need_wchar_t
39 #ifndef __need_malloc_and_calloc
42 #if defined __USE_XOPEN && !defined _SYS_WAIT_H
43 /* XPG requires a few symbols from <sys/wait.h> being defined. */
44 # include <bits/waitflags.h>
45 # include <bits/waitstatus.h>
49 /* Lots of hair to allow traditional BSD use of `union wait'
50 as well as POSIX.1 use of `int' for the status word. */
52 # if defined __GNUC__ && !defined __cplusplus
53 # define __WAIT_INT(status) \
54 (__extension__ ({ union { __typeof(status) __in; int __i; } __u; \
55 __u.__in = (status); __u.__i; }))
57 # define __WAIT_INT(status) (*(int *) &(status))
60 /* This is the type of the argument to `wait'. The funky union
61 causes redeclarations with ether `int *' or `union wait *' to be
62 allowed without complaint. __WAIT_STATUS_DEFN is the type used in
63 the actual function definitions. */
65 # if !defined __GNUC__ || __GNUC__ < 2 || defined __cplusplus
66 # define __WAIT_STATUS void *
67 # define __WAIT_STATUS_DEFN void *
69 /* This works in GCC 2.6.1 and later. */
74 } __WAIT_STATUS __attribute__ ((__transparent_union__));
75 # define __WAIT_STATUS_DEFN int *
78 # else /* Don't use BSD. */
80 # define __WAIT_INT(status) (status)
81 # define __WAIT_STATUS int *
82 # define __WAIT_STATUS_DEFN int *
84 # endif /* Use BSD. */
86 /* Define the macros <sys/wait.h> also would define this way. */
87 # define WEXITSTATUS(status) __WEXITSTATUS(__WAIT_INT(status))
88 # define WTERMSIG(status) __WTERMSIG(__WAIT_INT(status))
89 # define WSTOPSIG(status) __WSTOPSIG(__WAIT_INT(status))
90 # define WIFEXITED(status) __WIFEXITED(__WAIT_INT(status))
91 # define WIFSIGNALED(status) __WIFSIGNALED(__WAIT_INT(status))
92 # define WIFSTOPPED(status) __WIFSTOPPED(__WAIT_INT(status))
93 # if 0 /* def __WIFCONTINUED */
94 # define WIFCONTINUED(status) __WIFCONTINUED(__WAIT_INT(status))
96 #endif /* X/Open and <sys/wait.h> not included. */
99 /* Returned by `div'. */
102 int quot; /* Quotient. */
103 int rem; /* Remainder. */
106 /* Returned by `ldiv'. */
107 #ifndef __ldiv_t_defined
110 long int quot; /* Quotient. */
111 long int rem; /* Remainder. */
113 # define __ldiv_t_defined 1
117 #if defined __USE_ISOC99 && !defined __lldiv_t_defined
118 __BEGIN_NAMESPACE_C99
119 /* Returned by `lldiv'. */
120 __extension__ typedef struct
122 long long int quot; /* Quotient. */
123 long long int rem; /* Remainder. */
125 # define __lldiv_t_defined 1
130 /* The largest number rand will return (same as INT_MAX). */
131 #define RAND_MAX 2147483647
134 /* We define these the same for all machines.
135 Changes from this to the outside world should be done in `_exit'. */
136 #define EXIT_FAILURE 1 /* Failing exit status. */
137 #define EXIT_SUCCESS 0 /* Successful exit status. */
140 /* Maximum length of a multibyte character in the current locale. */
142 #define MB_CUR_MAX (__ctype_get_mb_cur_max ())
143 extern size_t __ctype_get_mb_cur_max (void) __THROW __wur;
145 #ifdef __UCLIBC_HAS_WCHAR__
146 #define MB_CUR_MAX (_stdlib_mb_cur_max ())
147 extern size_t _stdlib_mb_cur_max (void) __THROW __wur;
151 __BEGIN_NAMESPACE_STD
152 #ifdef __UCLIBC_HAS_FLOATS__
153 /* Convert a string to a floating-point number. */
154 extern double atof (__const char *__nptr)
155 __THROW __attribute_pure__ __nonnull ((1)) __wur;
156 #endif /* __UCLIBC_HAS_FLOATS__ */
157 /* Convert a string to an integer. */
158 extern int atoi (__const char *__nptr)
159 __THROW __attribute_pure__ __nonnull ((1)) __wur;
160 /* Convert a string to a long integer. */
161 extern long int atol (__const char *__nptr)
162 __THROW __attribute_pure__ __nonnull ((1)) __wur;
165 #if defined __USE_ISOC99 || defined __USE_MISC
166 __BEGIN_NAMESPACE_C99
167 /* Convert a string to a long long integer. */
168 __extension__ extern long long int atoll (__const char *__nptr)
169 __THROW __attribute_pure__ __nonnull ((1)) __wur;
173 #ifdef __UCLIBC_HAS_FLOATS__
174 __BEGIN_NAMESPACE_STD
175 /* Convert a string to a floating-point number. */
176 extern double strtod (__const char *__restrict __nptr,
177 char **__restrict __endptr)
178 __THROW __nonnull ((1)) __wur;
182 __BEGIN_NAMESPACE_C99
183 /* Likewise for `float' and `long double' sizes of floating-point numbers. */
184 extern float strtof (__const char *__restrict __nptr,
185 char **__restrict __endptr) __THROW __nonnull ((1)) __wur;
187 extern long double strtold (__const char *__restrict __nptr,
188 char **__restrict __endptr)
189 __THROW __nonnull ((1)) __wur;
192 #endif /* __UCLIBC_HAS_FLOATS__ */
194 __BEGIN_NAMESPACE_STD
195 /* Convert a string to a long integer. */
196 extern long int strtol (__const char *__restrict __nptr,
197 char **__restrict __endptr, int __base)
198 __THROW __nonnull ((1)) __wur;
199 /* Convert a string to an unsigned long integer. */
200 extern unsigned long int strtoul (__const char *__restrict __nptr,
201 char **__restrict __endptr, int __base)
202 __THROW __nonnull ((1)) __wur;
206 /* Convert a string to a quadword integer. */
208 extern long long int strtoq (__const char *__restrict __nptr,
209 char **__restrict __endptr, int __base)
210 __THROW __nonnull ((1)) __wur;
211 /* Convert a string to an unsigned quadword integer. */
213 extern unsigned long long int strtouq (__const char *__restrict __nptr,
214 char **__restrict __endptr, int __base)
215 __THROW __nonnull ((1)) __wur;
216 #endif /* GCC and use BSD. */
218 #if defined __USE_ISOC99 || defined __USE_MISC
219 __BEGIN_NAMESPACE_C99
220 /* Convert a string to a quadword integer. */
222 extern long long int strtoll (__const char *__restrict __nptr,
223 char **__restrict __endptr, int __base)
224 __THROW __nonnull ((1)) __wur;
225 /* Convert a string to an unsigned quadword integer. */
227 extern unsigned long long int strtoull (__const char *__restrict __nptr,
228 char **__restrict __endptr, int __base)
229 __THROW __nonnull ((1)) __wur;
231 #endif /* ISO C99 or GCC and use MISC. */
234 #ifdef __UCLIBC_HAS_XLOCALE__
236 /* The concept of one static locale per category is not very well
237 thought out. Many applications will need to process its data using
238 information from several different locales. Another application is
239 the implementation of the internationalization handling in the
240 upcoming ISO C++ standard library. To support this another set of
241 the functions using locale data exist which have an additional
244 Attention: all these functions are *not* standardized in any form.
245 This is a proof-of-concept implementation. */
247 /* Structure for reentrant locale using functions. This is an
248 (almost) opaque type for the user level programs. */
249 # include <xlocale.h>
251 /* Special versions of the functions above which take the locale to
252 use as an additional parameter. */
253 extern long int strtol_l (__const char *__restrict __nptr,
254 char **__restrict __endptr, int __base,
255 __locale_t __loc) __THROW __nonnull ((1, 4)) __wur;
257 extern unsigned long int strtoul_l (__const char *__restrict __nptr,
258 char **__restrict __endptr,
259 int __base, __locale_t __loc)
260 __THROW __nonnull ((1, 4)) __wur;
263 extern long long int strtoll_l (__const char *__restrict __nptr,
264 char **__restrict __endptr, int __base,
266 __THROW __nonnull ((1, 4)) __wur;
269 extern unsigned long long int strtoull_l (__const char *__restrict __nptr,
270 char **__restrict __endptr,
271 int __base, __locale_t __loc)
272 __THROW __nonnull ((1, 4)) __wur;
274 #ifdef __UCLIBC_HAS_FLOATS__
275 extern double strtod_l (__const char *__restrict __nptr,
276 char **__restrict __endptr, __locale_t __loc)
277 __THROW __nonnull ((1, 3)) __wur;
279 extern float strtof_l (__const char *__restrict __nptr,
280 char **__restrict __endptr, __locale_t __loc)
281 __THROW __nonnull ((1, 3)) __wur;
283 extern long double strtold_l (__const char *__restrict __nptr,
284 char **__restrict __endptr,
286 __THROW __nonnull ((1, 3)) __wur;
287 #endif /* __UCLIBC_HAS_FLOATS__ */
290 #endif /* __UCLIBC_HAS_XLOCALE__ */
293 #if defined __USE_SVID || defined __USE_XOPEN_EXTENDED
294 /* Convert N to base 64 using the digits "./0-9A-Za-z", least-significant
295 digit first. Returns a pointer to static storage overwritten by the
297 extern char *l64a (long int __n) __THROW __wur;
299 /* Read a number from a string S in base 64 as above. */
300 extern long int a64l (__const char *__s)
301 __THROW __attribute_pure__ __nonnull ((1)) __wur;
303 #endif /* Use SVID || extended X/Open. */
305 #if defined __USE_SVID || defined __USE_XOPEN_EXTENDED || defined __USE_BSD
306 # include <sys/types.h> /* we need int32_t... */
308 /* These are the functions that actually do things. The `random', `srandom',
309 `initstate' and `setstate' functions are those from BSD Unices.
310 The `rand' and `srand' functions are required by the ANSI standard.
311 We provide both interfaces to the same random number generator. */
312 /* Return a random long integer between 0 and RAND_MAX inclusive. */
313 extern long int random (void) __THROW;
315 /* Seed the random number generator with the given number. */
316 extern void srandom (unsigned int __seed) __THROW;
318 /* Initialize the random number generator to use state buffer STATEBUF,
319 of length STATELEN, and seed it with SEED. Optimal lengths are 8, 16,
320 32, 64, 128 and 256, the bigger the better; values less than 8 will
321 cause an error and values greater than 256 will be rounded down. */
322 extern char *initstate (unsigned int __seed, char *__statebuf,
323 size_t __statelen) __THROW __nonnull ((2));
325 /* Switch the random number generator to state buffer STATEBUF,
326 which should have been previously initialized by `initstate'. */
327 extern char *setstate (char *__statebuf) __THROW __nonnull ((1));
331 /* Reentrant versions of the `random' family of functions.
332 These functions all use the following data structure to contain
333 state, rather than global state variables. */
337 int32_t *fptr; /* Front pointer. */
338 int32_t *rptr; /* Rear pointer. */
339 int32_t *state; /* Array of state values. */
340 int rand_type; /* Type of random number generator. */
341 int rand_deg; /* Degree of random number generator. */
342 int rand_sep; /* Distance between front and rear. */
343 int32_t *end_ptr; /* Pointer behind state table. */
346 extern int random_r (struct random_data *__restrict __buf,
347 int32_t *__restrict __result) __THROW __nonnull ((1, 2));
349 extern int srandom_r (unsigned int __seed, struct random_data *__buf)
350 __THROW __nonnull ((2));
352 extern int initstate_r (unsigned int __seed, char *__restrict __statebuf,
354 struct random_data *__restrict __buf)
355 __THROW __nonnull ((2, 4));
357 extern int setstate_r (char *__restrict __statebuf,
358 struct random_data *__restrict __buf)
359 __THROW __nonnull ((1, 2));
360 # endif /* Use misc. */
361 #endif /* Use SVID || extended X/Open || BSD. */
364 __BEGIN_NAMESPACE_STD
365 /* Return a random integer between 0 and RAND_MAX inclusive. */
366 extern int rand (void) __THROW;
367 /* Seed the random number generator with the given number. */
368 extern void srand (unsigned int __seed) __THROW;
372 /* Reentrant interface according to POSIX.1. */
373 extern int rand_r (unsigned int *__seed) __THROW;
377 #if defined __USE_SVID || defined __USE_XOPEN
378 /* System V style 48-bit random number generator functions. */
380 #ifdef __UCLIBC_HAS_FLOATS__
381 /* Return non-negative, double-precision floating-point value in [0.0,1.0). */
382 extern double drand48 (void) __THROW;
383 extern double erand48 (unsigned short int __xsubi[3]) __THROW __nonnull ((1));
384 #endif /* __UCLIBC_HAS_FLOATS__ */
386 /* Return non-negative, long integer in [0,2^31). */
387 extern long int lrand48 (void) __THROW;
388 extern long int nrand48 (unsigned short int __xsubi[3])
389 __THROW __nonnull ((1));
391 /* Return signed, long integers in [-2^31,2^31). */
392 extern long int mrand48 (void) __THROW;
393 extern long int jrand48 (unsigned short int __xsubi[3])
394 __THROW __nonnull ((1));
396 /* Seed random number generator. */
397 extern void srand48 (long int __seedval) __THROW;
398 extern unsigned short int *seed48 (unsigned short int __seed16v[3])
399 __THROW __nonnull ((1));
400 extern void lcong48 (unsigned short int __param[7]) __THROW __nonnull ((1));
403 /* Data structure for communication with thread safe versions. This
404 type is to be regarded as opaque. It's only exported because users
405 have to allocate objects of this type. */
408 unsigned short int __x[3]; /* Current state. */
409 unsigned short int __old_x[3]; /* Old state. */
410 unsigned short int __c; /* Additive const. in congruential formula. */
411 unsigned short int __init; /* Flag for initializing. */
412 unsigned long long int __a; /* Factor in congruential formula. */
415 #ifdef __UCLIBC_HAS_FLOATS__
416 /* Return non-negative, double-precision floating-point value in [0.0,1.0). */
417 extern int drand48_r (struct drand48_data *__restrict __buffer,
418 double *__restrict __result) __THROW __nonnull ((1, 2));
419 extern int erand48_r (unsigned short int __xsubi[3],
420 struct drand48_data *__restrict __buffer,
421 double *__restrict __result) __THROW __nonnull ((1, 2));
422 #endif /* __UCLIBC_HAS_FLOATS__ */
424 /* Return non-negative, long integer in [0,2^31). */
425 extern int lrand48_r (struct drand48_data *__restrict __buffer,
426 long int *__restrict __result)
427 __THROW __nonnull ((1, 2));
428 extern int nrand48_r (unsigned short int __xsubi[3],
429 struct drand48_data *__restrict __buffer,
430 long int *__restrict __result)
431 __THROW __nonnull ((1, 2));
433 /* Return signed, long integers in [-2^31,2^31). */
434 extern int mrand48_r (struct drand48_data *__restrict __buffer,
435 long int *__restrict __result)
436 __THROW __nonnull ((1, 2));
437 extern int jrand48_r (unsigned short int __xsubi[3],
438 struct drand48_data *__restrict __buffer,
439 long int *__restrict __result)
440 __THROW __nonnull ((1, 2));
442 /* Seed random number generator. */
443 extern int srand48_r (long int __seedval, struct drand48_data *__buffer)
444 __THROW __nonnull ((2));
446 extern int seed48_r (unsigned short int __seed16v[3],
447 struct drand48_data *__buffer) __THROW __nonnull ((1, 2));
449 extern int lcong48_r (unsigned short int __param[7],
450 struct drand48_data *__buffer)
451 __THROW __nonnull ((1, 2));
452 # endif /* Use misc. */
453 #endif /* Use SVID or X/Open. */
455 #endif /* don't just need malloc and calloc */
457 #ifndef __malloc_and_calloc_defined
458 # define __malloc_and_calloc_defined
459 __BEGIN_NAMESPACE_STD
460 /* Allocate SIZE bytes of memory. */
461 extern void *malloc (size_t __size) __THROW __attribute_malloc__ __wur;
462 /* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */
463 extern void *calloc (size_t __nmemb, size_t __size)
464 __THROW __attribute_malloc__ __wur;
468 #ifndef __need_malloc_and_calloc
469 __BEGIN_NAMESPACE_STD
470 /* Re-allocate the previously allocated block
471 in PTR, making the new block SIZE bytes long. */
472 extern void *realloc (void *__ptr, size_t __size)
473 __THROW __attribute_malloc__ __attribute_warn_unused_result__;
474 /* Free a block allocated by `malloc', `realloc' or `calloc'. */
475 extern void free (void *__ptr) __THROW;
479 /* Free a block. An alias for `free'. (Sun Unices). */
480 extern void cfree (void *__ptr) __THROW;
481 #endif /* Use misc. */
483 #if defined __USE_GNU || defined __USE_BSD || defined __USE_MISC
485 #endif /* Use GNU, BSD, or misc. */
487 #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
488 /* Allocate SIZE bytes on a page boundary. The storage cannot be freed. */
489 extern void *valloc (size_t __size) __THROW __attribute_malloc__ __wur;
492 #if defined __USE_XOPEN2K && defined __UCLIBC_HAS_ADVANCED_REALTIME__
493 /* Allocate memory of SIZE bytes with an alignment of ALIGNMENT. */
494 extern int posix_memalign (void **__memptr, size_t __alignment, size_t __size)
495 __THROW __nonnull ((1)) __wur;
498 __BEGIN_NAMESPACE_STD
499 /* Abort execution and generate a core-dump. */
500 extern void abort (void) __THROW __attribute__ ((__noreturn__));
503 /* Register a function to be called when `exit' is called. */
504 extern int atexit (void (*__func) (void)) __THROW __nonnull ((1));
508 /* Register a function to be called with the status
509 given to `exit' and the given argument. */
510 extern int on_exit (void (*__func) (int __status, void *__arg), void *__arg)
511 __THROW __nonnull ((1));
514 __BEGIN_NAMESPACE_STD
515 /* Call all functions registered with `atexit' and `on_exit',
516 in the reverse of the order in which they were registered
517 perform stdio cleanup, and terminate program execution with STATUS. */
518 extern void exit (int __status) __THROW __attribute__ ((__noreturn__));
522 __BEGIN_NAMESPACE_C99
523 /* Terminate the program with STATUS without calling any of the
524 functions registered with `atexit' or `on_exit'. */
525 extern void _Exit (int __status) __THROW __attribute__ ((__noreturn__));
530 __BEGIN_NAMESPACE_STD
531 /* Return the value of envariable NAME, or NULL if it doesn't exist. */
532 extern char *getenv (__const char *__name) __THROW __nonnull ((1)) __wur;
535 /* This function is similar to the above but returns NULL if the
536 programs is running with SUID or SGID enabled. */
537 extern char *__secure_getenv (__const char *__name)
538 __THROW __nonnull ((1)) __wur;
540 #if defined __USE_SVID || defined __USE_XOPEN
541 /* The SVID says this is in <stdio.h>, but this seems a better place. */
542 /* Put STRING, which is of the form "NAME=VALUE", in the environment.
543 If there is no `=', remove NAME from the environment. */
544 extern int putenv (char *__string) __THROW __nonnull ((1));
547 #if defined __USE_BSD || defined __USE_XOPEN2K
548 /* Set NAME to VALUE in the environment.
549 If REPLACE is nonzero, overwrite an existing value. */
550 extern int setenv (__const char *__name, __const char *__value, int __replace)
551 __THROW __nonnull ((2));
553 /* Remove the variable NAME from the environment. */
554 extern int unsetenv (__const char *__name) __THROW;
557 /* The following is used by uClibc in atexit.c and sysconf.c */
558 /* We have no limit when __UCLIBC_DYNAMIC_ATEXIT__ is enabled. */
559 #ifdef __UCLIBC_DYNAMIC_ATEXIT__
560 # define __UCLIBC_MAX_ATEXIT INT_MAX
562 # define __UCLIBC_MAX_ATEXIT 20
567 /* The `clearenv' was planned to be added to POSIX.1 but probably
568 never made it. Nevertheless the POSIX.9 standard (POSIX bindings
569 for Fortran 77) requires this function. */
570 extern int clearenv (void) __THROW;
574 #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
575 /* Generate a unique temporary file name from TEMPLATE.
576 The last six characters of TEMPLATE must be "XXXXXX";
577 they are replaced with a string that makes the file name unique.
578 Returns TEMPLATE, or a null pointer if it cannot get a unique file name. */
579 extern char *mktemp (char *__template) __THROW __nonnull ((1)) __wur;
581 /* Generate a unique temporary file name from TEMPLATE.
582 The last six characters of TEMPLATE must be "XXXXXX";
583 they are replaced with a string that makes the filename unique.
584 Returns a file descriptor open on the file for reading and writing,
585 or -1 if it cannot create a uniquely-named file.
587 This function is a possible cancellation points and therefore not
588 marked with __THROW. */
589 # ifndef __USE_FILE_OFFSET64
590 extern int mkstemp (char *__template) __nonnull ((1)) __wur;
593 extern int __REDIRECT (mkstemp, (char *__template), mkstemp64)
594 __nonnull ((1)) __wur;
596 # define mkstemp mkstemp64
599 # ifdef __USE_LARGEFILE64
600 extern int mkstemp64 (char *__template) __nonnull ((1)) __wur;
605 /* Create a unique temporary directory from TEMPLATE.
606 The last six characters of TEMPLATE must be "XXXXXX";
607 they are replaced with a string that makes the directory name unique.
608 Returns TEMPLATE, or a null pointer if it cannot get a unique name.
609 The directory is created mode 700. */
610 extern char *mkdtemp (char *__template) __THROW __nonnull ((1)) __wur;
614 __BEGIN_NAMESPACE_STD
615 /* Execute the given line as a shell command.
617 This function is a cancellation point and therefore not marked with
619 extern int system (__const char *__command) __wur;
623 #if 0 /* def __USE_GNU */
624 /* Return a malloc'd string containing the canonical absolute name of the
625 named file. The last file name component need not exist, and may be a
626 symlink to a nonexistent file. */
627 extern char *canonicalize_file_name (__const char *__name)
628 __THROW __nonnull ((1)) __wur;
631 #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
632 /* Return the canonical absolute name of file NAME. The last file name
633 component need not exist, and may be a symlink to a nonexistent file.
634 If RESOLVED is null, the result is malloc'd; otherwise, if the canonical
635 name is PATH_MAX chars or more, returns null with `errno' set to
636 ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars, returns the
638 /* we choose to handle __resolved==NULL as crash :) */
639 extern char *realpath (__const char *__restrict __name,
640 char *__restrict __resolved) __THROW __wur __nonnull((2));
644 /* Shorthand for type of comparison functions. */
645 #ifndef __COMPAR_FN_T
646 # define __COMPAR_FN_T
647 typedef int (*__compar_fn_t) (__const void *, __const void *);
650 typedef __compar_fn_t comparison_fn_t;
654 __BEGIN_NAMESPACE_STD
655 /* Do a binary search for KEY in BASE, which consists of NMEMB elements
656 of SIZE bytes each, using COMPAR to perform the comparisons. */
657 extern void *bsearch (__const void *__key, __const void *__base,
658 size_t __nmemb, size_t __size, __compar_fn_t __compar)
659 __nonnull ((1, 2, 5)) __wur;
661 /* Sort NMEMB elements of BASE, of SIZE bytes each,
662 using COMPAR to perform the comparisons. */
663 extern void qsort (void *__base, size_t __nmemb, size_t __size,
664 __compar_fn_t __compar) __nonnull ((1, 4));
667 /* Return the absolute value of X. */
668 extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur;
669 extern long int labs (long int __x) __THROW __attribute__ ((__const__)) __wur;
673 __extension__ extern long long int llabs (long long int __x)
674 __THROW __attribute__ ((__const__)) __wur;
678 __BEGIN_NAMESPACE_STD
679 /* Return the `div_t', `ldiv_t' or `lldiv_t' representation
680 of the value of NUMER over DENOM. */
681 /* GCC may have built-ins for these someday. */
682 extern div_t div (int __numer, int __denom)
683 __THROW __attribute__ ((__const__)) __wur;
684 extern ldiv_t ldiv (long int __numer, long int __denom)
685 __THROW __attribute__ ((__const__)) __wur;
689 __BEGIN_NAMESPACE_C99
690 __extension__ extern lldiv_t lldiv (long long int __numer,
691 long long int __denom)
692 __THROW __attribute__ ((__const__)) __wur;
697 #if defined __USE_SVID || defined __USE_XOPEN_EXTENDED || defined __USE_BSD
698 /* Convert floating point numbers to strings. The returned values are
699 valid only until another call to the same function. */
701 # ifdef __UCLIBC_SUSV3_LEGACY__
704 /* Convert VALUE to a string with NDIGIT digits and return a pointer to
705 this. Set *DECPT with the position of the decimal character and *SIGN
706 with the sign of the number. */
707 extern char *ecvt (double __value, int __ndigit, int *__restrict __decpt,
708 int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur;
710 /* Convert VALUE to a string rounded to NDIGIT decimal digits. Set *DECPT
711 with the position of the decimal character and *SIGN with the sign of
713 extern char *fcvt (double __value, int __ndigit, int *__restrict __decpt,
714 int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur;
717 /* If possible convert VALUE to a string with NDIGIT significant digits.
718 Otherwise use exponential representation. The resulting string will
719 be written to BUF. */
720 extern char *gcvt (double __value, int __ndigit, char *__buf)
721 __THROW __nonnull ((3)) __wur;
722 # endif /* __UCLIBC_SUSV3_LEGACY__ */
724 # if 0 /*def __USE_MISC*/
725 /* Long double versions of above functions. */
726 extern char *qecvt (long double __value, int __ndigit,
727 int *__restrict __decpt, int *__restrict __sign)
728 __THROW __nonnull ((3, 4)) __wur;
729 extern char *qfcvt (long double __value, int __ndigit,
730 int *__restrict __decpt, int *__restrict __sign)
731 __THROW __nonnull ((3, 4)) __wur;
732 extern char *qgcvt (long double __value, int __ndigit, char *__buf)
733 __THROW __nonnull ((3)) __wur;
736 /* Reentrant version of the functions above which provide their own
738 extern int ecvt_r (double __value, int __ndigit, int *__restrict __decpt,
739 int *__restrict __sign, char *__restrict __buf,
740 size_t __len) __THROW __nonnull ((3, 4, 5));
741 extern int fcvt_r (double __value, int __ndigit, int *__restrict __decpt,
742 int *__restrict __sign, char *__restrict __buf,
743 size_t __len) __THROW __nonnull ((3, 4, 5));
745 extern int qecvt_r (long double __value, int __ndigit,
746 int *__restrict __decpt, int *__restrict __sign,
747 char *__restrict __buf, size_t __len)
748 __THROW __nonnull ((3, 4, 5));
749 extern int qfcvt_r (long double __value, int __ndigit,
750 int *__restrict __decpt, int *__restrict __sign,
751 char *__restrict __buf, size_t __len)
752 __THROW __nonnull ((3, 4, 5));
754 #endif /* use MISC || use X/Open Unix */
756 #ifdef __UCLIBC_HAS_WCHAR__
757 __BEGIN_NAMESPACE_STD
758 /* Return the length of the multibyte character
759 in S, which is no longer than N. */
760 extern int mblen (__const char *__s, size_t __n) __THROW __wur;
761 /* Return the length of the given multibyte character,
762 putting its `wchar_t' representation in *PWC. */
763 extern int mbtowc (wchar_t *__restrict __pwc,
764 __const char *__restrict __s, size_t __n) __THROW __wur;
765 /* Put the multibyte character represented
766 by WCHAR in S, returning its length. */
767 extern int wctomb (char *__s, wchar_t __wchar) __THROW __wur;
770 /* Convert a multibyte string to a wide char string. */
771 extern size_t mbstowcs (wchar_t *__restrict __pwcs,
772 __const char *__restrict __s, size_t __n) __THROW;
773 /* Convert a wide char string to multibyte string. */
774 extern size_t wcstombs (char *__restrict __s,
775 __const wchar_t *__restrict __pwcs, size_t __n)
778 #endif /* __UCLIBC_HAS_WCHAR__ */
782 /* Determine whether the string value of RESPONSE matches the affirmation
783 or negative response expression as specified by the LC_MESSAGES category
784 in the program's current locale. Returns 1 if affirmative, 0 if
785 negative, and -1 if not matching. */
786 extern int rpmatch (__const char *__response) __THROW __nonnull ((1)) __wur;
790 #ifdef __USE_XOPEN_EXTENDED
791 /* Parse comma separated suboption from *OPTIONP and match against
792 strings in TOKENS. If found return index and set *VALUEP to
793 optional value introduced by an equal sign. If the suboption is
794 not part of TOKENS return in *VALUEP beginning of unknown
795 suboption. On exit *OPTIONP is set to the beginning of the next
796 token or at the terminating NUL character. */
797 extern int getsubopt (char **__restrict __optionp,
798 char *__const *__restrict __tokens,
799 char **__restrict __valuep)
800 __THROW __nonnull ((1, 2, 3)) __wur;
805 /* Setup DES tables according KEY. */
806 extern void setkey (__const char *__key) __THROW __nonnull ((1));
810 /* X/Open pseudo terminal handling. */
813 /* Return a master pseudo-terminal handle. */
814 extern int posix_openpt (int __oflag) __wur;
818 /* The next four functions all take a master pseudo-tty fd and
819 perform an operation on the associated slave: */
820 #ifdef __UCLIBC_HAS_PTY__
821 /* Chown the slave to the calling user. */
822 extern int grantpt (int __fd) __THROW;
824 /* Release an internal lock so the slave can be opened.
825 Call after grantpt(). */
826 extern int unlockpt (int __fd) __THROW;
828 /* Return the pathname of the pseudo terminal slave assoicated with
829 the master FD is open on, or NULL on errors.
830 The returned storage is good until the next call to this function. */
831 extern char *ptsname (int __fd) __THROW __wur;
832 #endif /* __UCLIBC_HAS_PTY__ */
836 /* Store at most BUFLEN characters of the pathname of the slave pseudo
837 terminal associated with the master FD is open on in BUF.
838 Return 0 on success, otherwise an error number. */
839 extern int ptsname_r (int __fd, char *__buf, size_t __buflen)
840 __THROW __nonnull ((2));
842 /* Open a master pseudo terminal and return its file descriptor. */
843 extern int getpt (void);
846 #if 0 /* def __USE_BSD */
847 /* Put the 1 minute, 5 minute and 15 minute load averages into the first
848 NELEM elements of LOADAVG. Return the number written (never more than
849 three, but may be less than NELEM), or -1 if an error occurred. */
850 extern int getloadavg (double __loadavg[], int __nelem)
851 __THROW __nonnull ((1));
854 #ifdef __UCLIBC_HAS_ARC4RANDOM__
856 extern uint32_t arc4random(void);
857 extern void arc4random_stir(void);
858 extern void arc4random_addrandom(unsigned char *, int);
861 #endif /* don't just need malloc and calloc */
862 #undef __need_malloc_and_calloc
866 #endif /* stdlib.h */