1 /* Copyright (C) 1991-2002, 2003, 2004 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;
145 #ifdef __UCLIBC_HAS_WCHAR__
146 #define MB_CUR_MAX (_stdlib_mb_cur_max ())
147 extern size_t _stdlib_mb_cur_max (void) __THROW;
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));
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));
160 /* Convert a string to a long integer. */
161 extern long int atol (__const char *__nptr)
162 __THROW __attribute_pure__ __nonnull ((1));
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));
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) __THROW __nonnull ((1));
181 __BEGIN_NAMESPACE_C99
182 /* Likewise for `float' and `long double' sizes of floating-point numbers. */
183 extern float strtof (__const char *__restrict __nptr,
184 char **__restrict __endptr) __THROW __nonnull ((1));
186 extern long double strtold (__const char *__restrict __nptr,
187 char **__restrict __endptr)
188 __THROW __nonnull ((1));
191 #endif /* __UCLIBC_HAS_FLOATS__ */
193 __BEGIN_NAMESPACE_STD
194 /* Convert a string to a long integer. */
195 extern long int strtol (__const char *__restrict __nptr,
196 char **__restrict __endptr, int __base)
197 __THROW __nonnull ((1));
198 /* Convert a string to an unsigned long integer. */
199 extern unsigned long int strtoul (__const char *__restrict __nptr,
200 char **__restrict __endptr, int __base)
201 __THROW __nonnull ((1));
205 /* Convert a string to a quadword integer. */
207 extern long long int strtoq (__const char *__restrict __nptr,
208 char **__restrict __endptr, int __base)
209 __THROW __nonnull ((1));
210 /* Convert a string to an unsigned quadword integer. */
212 extern unsigned long long int strtouq (__const char *__restrict __nptr,
213 char **__restrict __endptr, int __base)
214 __THROW __nonnull ((1));
215 #endif /* GCC and use BSD. */
217 #if defined __USE_ISOC99 || defined __USE_MISC
218 __BEGIN_NAMESPACE_C99
219 /* Convert a string to a quadword integer. */
221 extern long long int strtoll (__const char *__restrict __nptr,
222 char **__restrict __endptr, int __base)
223 __THROW __nonnull ((1));
224 /* Convert a string to an unsigned quadword integer. */
226 extern unsigned long long int strtoull (__const char *__restrict __nptr,
227 char **__restrict __endptr, int __base)
228 __THROW __nonnull ((1));
230 #endif /* ISO C99 or GCC and use MISC. */
233 #ifdef __UCLIBC_HAS_XLOCALE__
235 /* The concept of one static locale per category is not very well
236 thought out. Many applications will need to process its data using
237 information from several different locales. Another application is
238 the implementation of the internationalization handling in the
239 upcoming ISO C++ standard library. To support this another set of
240 the functions using locale data exist which have an additional
243 Attention: all these functions are *not* standardized in any form.
244 This is a proof-of-concept implementation. */
246 /* Structure for reentrant locale using functions. This is an
247 (almost) opaque type for the user level programs. */
248 # include <xlocale.h>
250 /* Special versions of the functions above which take the locale to
251 use as an additional parameter. */
252 extern long int strtol_l (__const char *__restrict __nptr,
253 char **__restrict __endptr, int __base,
254 __locale_t __loc) __THROW __nonnull ((1, 4));
256 extern unsigned long int strtoul_l (__const char *__restrict __nptr,
257 char **__restrict __endptr,
258 int __base, __locale_t __loc)
259 __THROW __nonnull ((1, 4));
262 extern long long int strtoll_l (__const char *__restrict __nptr,
263 char **__restrict __endptr, int __base,
265 __THROW __nonnull ((1, 4));
268 extern unsigned long long int strtoull_l (__const char *__restrict __nptr,
269 char **__restrict __endptr,
270 int __base, __locale_t __loc)
271 __THROW __nonnull ((1, 4));
273 extern double strtod_l (__const char *__restrict __nptr,
274 char **__restrict __endptr, __locale_t __loc)
275 __THROW __nonnull ((1, 3));
277 extern float strtof_l (__const char *__restrict __nptr,
278 char **__restrict __endptr, __locale_t __loc)
279 __THROW __nonnull ((1, 3));
281 extern long double strtold_l (__const char *__restrict __nptr,
282 char **__restrict __endptr,
283 __locale_t __loc) __THROW __nonnull ((1, 3));
285 /* Internal names to support libstd++. */
286 extern long int __strtol_l (__const char *__restrict __nptr,
287 char **__restrict __endptr, int __base,
288 __locale_t __loc) __THROW __nonnull ((1, 4));
290 extern unsigned long int __strtoul_l (__const char *__restrict __nptr,
291 char **__restrict __endptr,
292 int __base, __locale_t __loc)
293 __THROW __nonnull ((1, 4));
296 extern long long int __strtoll_l (__const char *__restrict __nptr,
297 char **__restrict __endptr, int __base,
299 __THROW __nonnull ((1, 4));
302 extern unsigned long long int __strtoull_l (__const char *__restrict __nptr,
303 char **__restrict __endptr,
304 int __base, __locale_t __loc)
305 __THROW __nonnull ((1, 4));
307 extern double __strtod_l (__const char *__restrict __nptr,
308 char **__restrict __endptr, __locale_t __loc)
309 __THROW __nonnull ((1, 3));
311 extern float __strtof_l (__const char *__restrict __nptr,
312 char **__restrict __endptr, __locale_t __loc)
313 __THROW __nonnull ((1, 3));
315 extern long double __strtold_l (__const char *__restrict __nptr,
316 char **__restrict __endptr,
317 __locale_t __loc) __THROW __nonnull ((1, 3));
319 #endif /* __UCLIBC_HAS_XLOCALE__ */
322 #if defined __USE_SVID || defined __USE_XOPEN_EXTENDED
323 /* Convert N to base 64 using the digits "./0-9A-Za-z", least-significant
324 digit first. Returns a pointer to static storage overwritten by the
326 extern char *l64a (long int __n) __THROW;
328 /* Read a number from a string S in base 64 as above. */
329 extern long int a64l (__const char *__s)
330 __THROW __attribute_pure__ __nonnull ((1));
332 #endif /* Use SVID || extended X/Open. */
334 #if defined __USE_SVID || defined __USE_XOPEN_EXTENDED || defined __USE_BSD
335 # include <sys/types.h> /* we need int32_t... */
337 /* These are the functions that actually do things. The `random', `srandom',
338 `initstate' and `setstate' functions are those from BSD Unices.
339 The `rand' and `srand' functions are required by the ANSI standard.
340 We provide both interfaces to the same random number generator. */
341 /* Return a random long integer between 0 and RAND_MAX inclusive. */
342 extern long int random (void) __THROW;
344 /* Seed the random number generator with the given number. */
345 extern void srandom (unsigned int __seed) __THROW;
347 /* Initialize the random number generator to use state buffer STATEBUF,
348 of length STATELEN, and seed it with SEED. Optimal lengths are 8, 16,
349 32, 64, 128 and 256, the bigger the better; values less than 8 will
350 cause an error and values greater than 256 will be rounded down. */
351 extern char *initstate (unsigned int __seed, char *__statebuf,
352 size_t __statelen) __THROW __nonnull ((2));
354 /* Switch the random number generator to state buffer STATEBUF,
355 which should have been previously initialized by `initstate'. */
356 extern char *setstate (char *__statebuf) __THROW __nonnull ((1));
360 /* Reentrant versions of the `random' family of functions.
361 These functions all use the following data structure to contain
362 state, rather than global state variables. */
366 int32_t *fptr; /* Front pointer. */
367 int32_t *rptr; /* Rear pointer. */
368 int32_t *state; /* Array of state values. */
369 int rand_type; /* Type of random number generator. */
370 int rand_deg; /* Degree of random number generator. */
371 int rand_sep; /* Distance between front and rear. */
372 int32_t *end_ptr; /* Pointer behind state table. */
375 extern int random_r (struct random_data *__restrict __buf,
376 int32_t *__restrict __result) __THROW __nonnull ((1, 2));
378 extern int srandom_r (unsigned int __seed, struct random_data *__buf)
379 __THROW __nonnull ((2));
381 extern int initstate_r (unsigned int __seed, char *__restrict __statebuf,
383 struct random_data *__restrict __buf)
384 __THROW __nonnull ((2, 4));
386 extern int setstate_r (char *__restrict __statebuf,
387 struct random_data *__restrict __buf)
388 __THROW __nonnull ((1, 2));
389 # endif /* Use misc. */
390 #endif /* Use SVID || extended X/Open || BSD. */
393 __BEGIN_NAMESPACE_STD
394 /* Return a random integer between 0 and RAND_MAX inclusive. */
395 extern int rand (void) __THROW;
396 /* Seed the random number generator with the given number. */
397 extern void srand (unsigned int __seed) __THROW;
401 /* Reentrant interface according to POSIX.1. */
402 extern int rand_r (unsigned int *__seed) __THROW;
406 #if defined __USE_SVID || defined __USE_XOPEN
407 /* System V style 48-bit random number generator functions. */
409 #ifdef __UCLIBC_HAS_FLOATS__
410 /* Return non-negative, double-precision floating-point value in [0.0,1.0). */
411 extern double drand48 (void) __THROW;
412 extern double erand48 (unsigned short int __xsubi[3]) __THROW __nonnull ((1));
413 #endif /* __UCLIBC_HAS_FLOATS__ */
415 /* Return non-negative, long integer in [0,2^31). */
416 extern long int lrand48 (void) __THROW;
417 extern long int nrand48 (unsigned short int __xsubi[3])
418 __THROW __nonnull ((1));
420 /* Return signed, long integers in [-2^31,2^31). */
421 extern long int mrand48 (void) __THROW;
422 extern long int jrand48 (unsigned short int __xsubi[3])
423 __THROW __nonnull ((1));
425 /* Seed random number generator. */
426 extern void srand48 (long int __seedval) __THROW;
427 extern unsigned short int *seed48 (unsigned short int __seed16v[3])
428 __THROW __nonnull ((1));
429 extern void lcong48 (unsigned short int __param[7]) __THROW __nonnull ((1));
432 /* Data structure for communication with thread safe versions. This
433 type is to be regarded as opaque. It's only exported because users
434 have to allocate objects of this type. */
437 unsigned short int __x[3]; /* Current state. */
438 unsigned short int __old_x[3]; /* Old state. */
439 unsigned short int __c; /* Additive const. in congruential formula. */
440 unsigned short int __init; /* Flag for initializing. */
441 unsigned long long int __a; /* Factor in congruential formula. */
444 #ifdef __UCLIBC_HAS_FLOATS__
445 /* Return non-negative, double-precision floating-point value in [0.0,1.0). */
446 extern int drand48_r (struct drand48_data *__restrict __buffer,
447 double *__restrict __result) __THROW __nonnull ((1, 2));
448 extern int erand48_r (unsigned short int __xsubi[3],
449 struct drand48_data *__restrict __buffer,
450 double *__restrict __result) __THROW __nonnull ((1, 2));
451 #endif /* __UCLIBC_HAS_FLOATS__ */
453 /* Return non-negative, long integer in [0,2^31). */
454 extern int lrand48_r (struct drand48_data *__restrict __buffer,
455 long int *__restrict __result)
456 __THROW __nonnull ((1, 2));
457 extern int nrand48_r (unsigned short int __xsubi[3],
458 struct drand48_data *__restrict __buffer,
459 long int *__restrict __result)
460 __THROW __nonnull ((1, 2));
462 /* Return signed, long integers in [-2^31,2^31). */
463 extern int mrand48_r (struct drand48_data *__restrict __buffer,
464 long int *__restrict __result)
465 __THROW __nonnull ((1, 2));
466 extern int jrand48_r (unsigned short int __xsubi[3],
467 struct drand48_data *__restrict __buffer,
468 long int *__restrict __result)
469 __THROW __nonnull ((1, 2));
471 /* Seed random number generator. */
472 extern int srand48_r (long int __seedval, struct drand48_data *__buffer)
473 __THROW __nonnull ((2));
475 extern int seed48_r (unsigned short int __seed16v[3],
476 struct drand48_data *__buffer) __THROW __nonnull ((1, 2));
478 extern int lcong48_r (unsigned short int __param[7],
479 struct drand48_data *__buffer)
480 __THROW __nonnull ((1, 2));
481 # endif /* Use misc. */
482 #endif /* Use SVID or X/Open. */
484 #endif /* don't just need malloc and calloc */
486 #ifndef __malloc_and_calloc_defined
487 # define __malloc_and_calloc_defined
488 __BEGIN_NAMESPACE_STD
489 /* Allocate SIZE bytes of memory. */
490 extern void *malloc (size_t __size) __THROW __attribute_malloc__;
491 /* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */
492 extern void *calloc (size_t __nmemb, size_t __size)
493 __THROW __attribute_malloc__;
497 #ifndef __need_malloc_and_calloc
498 __BEGIN_NAMESPACE_STD
499 /* Re-allocate the previously allocated block
500 in PTR, making the new block SIZE bytes long. */
501 extern void *realloc (void *__ptr, size_t __size) __THROW __attribute_malloc__;
502 /* Free a block allocated by `malloc', `realloc' or `calloc'. */
503 extern void free (void *__ptr) __THROW;
507 /* Free a block. An alias for `free'. (Sun Unices). */
508 extern void cfree (void *__ptr) __THROW;
509 #endif /* Use misc. */
511 #if defined __USE_GNU || defined __USE_BSD || defined __USE_MISC
513 #endif /* Use GNU, BSD, or misc. */
515 #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
516 /* Allocate SIZE bytes on a page boundary. The storage cannot be freed. */
517 extern void *valloc (size_t __size) __THROW __attribute_malloc__;
521 /* Allocate memory of SIZE bytes with an alignment of ALIGNMENT. */
522 extern int posix_memalign (void **__memptr, size_t __alignment, size_t __size)
523 __THROW __attribute_malloc__ __nonnull ((1));
526 __BEGIN_NAMESPACE_STD
527 /* Abort execution and generate a core-dump. */
528 extern void abort (void) __THROW __attribute__ ((__noreturn__));
531 /* Register a function to be called when `exit' is called. */
532 extern int atexit (void (*__func) (void)) __THROW __nonnull ((1));
536 /* Register a function to be called with the status
537 given to `exit' and the given argument. */
538 extern int on_exit (void (*__func) (int __status, void *__arg), void *__arg)
539 __THROW __nonnull ((1));
542 __BEGIN_NAMESPACE_STD
543 /* Call all functions registered with `atexit' and `on_exit',
544 in the reverse of the order in which they were registered
545 perform stdio cleanup, and terminate program execution with STATUS. */
546 extern void exit (int __status) __THROW __attribute__ ((__noreturn__));
550 __BEGIN_NAMESPACE_C99
551 /* Terminate the program with STATUS without calling any of the
552 functions registered with `atexit' or `on_exit'. */
553 extern void _Exit (int __status) __THROW __attribute__ ((__noreturn__));
558 __BEGIN_NAMESPACE_STD
559 /* Return the value of envariable NAME, or NULL if it doesn't exist. */
560 extern char *getenv (__const char *__name) __THROW __nonnull ((1));
563 /* This function is similar to the above but returns NULL if the
564 programs is running with SUID or SGID enabled. */
565 extern char *__secure_getenv (__const char *__name) __THROW __nonnull ((1));
567 #if defined __USE_SVID || defined __USE_XOPEN
568 /* The SVID says this is in <stdio.h>, but this seems a better place. */
569 /* Put STRING, which is of the form "NAME=VALUE", in the environment.
570 If there is no `=', remove NAME from the environment. */
571 extern int putenv (char *__string) __THROW __nonnull ((1));
574 #if defined __USE_BSD || defined __USE_XOPEN2K
575 /* Set NAME to VALUE in the environment.
576 If REPLACE is nonzero, overwrite an existing value. */
577 extern int setenv (__const char *__name, __const char *__value, int __replace)
578 __THROW __nonnull ((2));
580 /* Remove the variable NAME from the environment. */
581 extern int unsetenv (__const char *__name) __THROW;
584 /* The following is used by uClibc in atexit.c and sysconf.c */
585 /* We have no limit when __UCLIBC_DYNAMIC_ATEXIT__ is enabled. */
586 #ifdef __UCLIBC_DYNAMIC_ATEXIT__
587 # define __UCLIBC_MAX_ATEXIT INT_MAX
589 # define __UCLIBC_MAX_ATEXIT 20
594 /* The `clearenv' was planned to be added to POSIX.1 but probably
595 never made it. Nevertheless the POSIX.9 standard (POSIX bindings
596 for Fortran 77) requires this function. */
597 extern int clearenv (void) __THROW;
601 #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
602 /* Generate a unique temporary file name from TEMPLATE.
603 The last six characters of TEMPLATE must be "XXXXXX";
604 they are replaced with a string that makes the file name unique.
605 Returns TEMPLATE, or a null pointer if it cannot get a unique file name. */
606 extern char *mktemp (char *__template) __THROW __nonnull ((1));
608 /* Generate a unique temporary file name from TEMPLATE.
609 The last six characters of TEMPLATE must be "XXXXXX";
610 they are replaced with a string that makes the filename unique.
611 Returns a file descriptor open on the file for reading and writing,
612 or -1 if it cannot create a uniquely-named file.
614 This function is a possible cancellation points and therefore not
615 marked with __THROW. */
616 # ifndef __USE_FILE_OFFSET64
617 extern int mkstemp (char *__template) __nonnull ((1));
620 extern int __REDIRECT (mkstemp, (char *__template), mkstemp64) __nonnull ((1));
622 # define mkstemp mkstemp64
625 # ifdef __USE_LARGEFILE64
626 extern int mkstemp64 (char *__template) __nonnull ((1));
631 /* Create a unique temporary directory from TEMPLATE.
632 The last six characters of TEMPLATE must be "XXXXXX";
633 they are replaced with a string that makes the directory name unique.
634 Returns TEMPLATE, or a null pointer if it cannot get a unique name.
635 The directory is created mode 700. */
636 extern char *mkdtemp (char *__template) __THROW __nonnull ((1));
640 __BEGIN_NAMESPACE_STD
641 /* Execute the given line as a shell command.
643 This function is a cancellation point and therefore not marked with
645 extern int system (__const char *__command);
649 #if 0 /* def __USE_GNU */
650 /* Return a malloc'd string containing the canonical absolute name of the
651 named file. The last file name component need not exist, and may be a
652 symlink to a nonexistent file. */
653 extern char *canonicalize_file_name (__const char *__name)
654 __THROW __nonnull ((1));
657 #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
658 /* Return the canonical absolute name of file NAME. The last file name
659 component need not exist, and may be a symlink to a nonexistent file.
660 If RESOLVED is null, the result is malloc'd; otherwise, if the canonical
661 name is PATH_MAX chars or more, returns null with `errno' set to
662 ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars, returns the
664 extern char *realpath (__const char *__restrict __name,
665 char *__restrict __resolved) __THROW;
669 /* Shorthand for type of comparison functions. */
670 #ifndef __COMPAR_FN_T
671 # define __COMPAR_FN_T
672 typedef int (*__compar_fn_t) (__const void *, __const void *);
675 typedef __compar_fn_t comparison_fn_t;
679 __BEGIN_NAMESPACE_STD
680 /* Do a binary search for KEY in BASE, which consists of NMEMB elements
681 of SIZE bytes each, using COMPAR to perform the comparisons. */
682 extern void *bsearch (__const void *__key, __const void *__base,
683 size_t __nmemb, size_t __size, __compar_fn_t __compar)
684 __nonnull ((1, 2, 5));
686 /* Sort NMEMB elements of BASE, of SIZE bytes each,
687 using COMPAR to perform the comparisons. */
688 extern void qsort (void *__base, size_t __nmemb, size_t __size,
689 __compar_fn_t __compar) __nonnull ((1, 4));
692 /* Return the absolute value of X. */
693 extern int abs (int __x) __THROW __attribute__ ((__const__));
694 extern long int labs (long int __x) __THROW __attribute__ ((__const__));
698 __extension__ extern long long int llabs (long long int __x)
699 __THROW __attribute__ ((__const__));
703 __BEGIN_NAMESPACE_STD
704 /* Return the `div_t', `ldiv_t' or `lldiv_t' representation
705 of the value of NUMER over DENOM. */
706 /* GCC may have built-ins for these someday. */
707 extern div_t div (int __numer, int __denom)
708 __THROW __attribute__ ((__const__));
709 extern ldiv_t ldiv (long int __numer, long int __denom)
710 __THROW __attribute__ ((__const__));
714 __BEGIN_NAMESPACE_C99
715 __extension__ extern lldiv_t lldiv (long long int __numer,
716 long long int __denom)
717 __THROW __attribute__ ((__const__));
722 #if 0 /* defined __USE_SVID || defined __USE_XOPEN_EXTENDED */
723 /* Convert floating point numbers to strings. The returned values are
724 valid only until another call to the same function. */
726 /* Convert VALUE to a string with NDIGIT digits and return a pointer to
727 this. Set *DECPT with the position of the decimal character and *SIGN
728 with the sign of the number. */
729 extern char *ecvt (double __value, int __ndigit, int *__restrict __decpt,
730 int *__restrict __sign) __THROW __nonnull ((3, 4));
732 /* Convert VALUE to a string rounded to NDIGIT decimal digits. Set *DECPT
733 with the position of the decimal character and *SIGN with the sign of
735 extern char *fcvt (double __value, int __ndigit, int *__restrict __decpt,
736 int *__restrict __sign) __THROW __nonnull ((3, 4));
738 /* If possible convert VALUE to a string with NDIGIT significant digits.
739 Otherwise use exponential representation. The resulting string will
740 be written to BUF. */
741 extern char *gcvt (double __value, int __ndigit, char *__buf)
742 __THROW __nonnull ((3));
746 /* Long double versions of above functions. */
747 extern char *qecvt (long double __value, int __ndigit,
748 int *__restrict __decpt, int *__restrict __sign)
749 __THROW __nonnull ((3, 4));
750 extern char *qfcvt (long double __value, int __ndigit,
751 int *__restrict __decpt, int *__restrict __sign)
752 __THROW __nonnull ((3, 4));
753 extern char *qgcvt (long double __value, int __ndigit, char *__buf)
754 __THROW __nonnull ((3));
757 /* Reentrant version of the functions above which provide their own
759 extern int ecvt_r (double __value, int __ndigit, int *__restrict __decpt,
760 int *__restrict __sign, char *__restrict __buf,
761 size_t __len) __THROW __nonnull ((3, 4, 5));
762 extern int fcvt_r (double __value, int __ndigit, int *__restrict __decpt,
763 int *__restrict __sign, char *__restrict __buf,
764 size_t __len) __THROW __nonnull ((3, 4, 5));
766 extern int qecvt_r (long double __value, int __ndigit,
767 int *__restrict __decpt, int *__restrict __sign,
768 char *__restrict __buf, size_t __len)
769 __THROW __nonnull ((3, 4, 5));
770 extern int qfcvt_r (long double __value, int __ndigit,
771 int *__restrict __decpt, int *__restrict __sign,
772 char *__restrict __buf, size_t __len)
773 __THROW __nonnull ((3, 4, 5));
775 #endif /* use MISC || use X/Open Unix */
777 #ifdef __UCLIBC_HAS_WCHAR__
778 __BEGIN_NAMESPACE_STD
779 /* Return the length of the multibyte character
780 in S, which is no longer than N. */
781 extern int mblen (__const char *__s, size_t __n) __THROW;
782 /* Return the length of the given multibyte character,
783 putting its `wchar_t' representation in *PWC. */
784 extern int mbtowc (wchar_t *__restrict __pwc,
785 __const char *__restrict __s, size_t __n) __THROW;
786 /* Put the multibyte character represented
787 by WCHAR in S, returning its length. */
788 extern int wctomb (char *__s, wchar_t __wchar) __THROW;
791 /* Convert a multibyte string to a wide char string. */
792 extern size_t mbstowcs (wchar_t *__restrict __pwcs,
793 __const char *__restrict __s, size_t __n) __THROW;
794 /* Convert a wide char string to multibyte string. */
795 extern size_t wcstombs (char *__restrict __s,
796 __const wchar_t *__restrict __pwcs, size_t __n)
799 #endif /* __UCLIBC_HAS_WCHAR__ */
803 /* Determine whether the string value of RESPONSE matches the affirmation
804 or negative response expression as specified by the LC_MESSAGES category
805 in the program's current locale. Returns 1 if affirmative, 0 if
806 negative, and -1 if not matching. */
807 extern int rpmatch (__const char *__response) __THROW __nonnull ((1));
811 #ifdef __USE_XOPEN_EXTENDED
812 /* Parse comma separated suboption from *OPTIONP and match against
813 strings in TOKENS. If found return index and set *VALUEP to
814 optional value introduced by an equal sign. If the suboption is
815 not part of TOKENS return in *VALUEP beginning of unknown
816 suboption. On exit *OPTIONP is set to the beginning of the next
817 token or at the terminating NUL character. */
818 extern int getsubopt (char **__restrict __optionp,
819 char *__const *__restrict __tokens,
820 char **__restrict __valuep)
821 __THROW __nonnull ((1, 2, 3));
826 /* Setup DES tables according KEY. */
827 extern void setkey (__const char *__key) __THROW __nonnull ((1));
831 /* X/Open pseudo terminal handling. */
834 /* Return a master pseudo-terminal handle. */
835 extern int posix_openpt (int __oflag);
839 /* The next four functions all take a master pseudo-tty fd and
840 perform an operation on the associated slave: */
842 /* Chown the slave to the calling user. */
843 extern int grantpt (int __fd) __THROW;
845 /* Release an internal lock so the slave can be opened.
846 Call after grantpt(). */
847 extern int unlockpt (int __fd) __THROW;
849 /* Return the pathname of the pseudo terminal slave assoicated with
850 the master FD is open on, or NULL on errors.
851 The returned storage is good until the next call to this function. */
852 extern char *ptsname (int __fd) __THROW;
856 /* Store at most BUFLEN characters of the pathname of the slave pseudo
857 terminal associated with the master FD is open on in BUF.
858 Return 0 on success, otherwise an error number. */
859 extern int ptsname_r (int __fd, char *__buf, size_t __buflen)
860 __THROW __nonnull ((2));
862 /* Open a master pseudo terminal and return its file descriptor. */
863 extern int getpt (void);
866 #if 0 /* def __USE_BSD */
867 /* Put the 1 minute, 5 minute and 15 minute load averages into the first
868 NELEM elements of LOADAVG. Return the number written (never more than
869 three, but may be less than NELEM), or -1 if an error occurred. */
870 extern int getloadavg (double __loadavg[], int __nelem)
871 __THROW __nonnull ((1));
874 #endif /* don't just need malloc and calloc */
875 #undef __need_malloc_and_calloc
879 #endif /* stdlib.h */