1 /* Copyright (C) 1991-1999, 2000, 2001 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 #endif /* X/Open and <sys/wait.h> not included. */
95 /* Returned by `div'. */
98 int quot; /* Quotient. */
99 int rem; /* Remainder. */
102 /* Returned by `ldiv'. */
103 #ifndef __ldiv_t_defined
106 long int quot; /* Quotient. */
107 long int rem; /* Remainder. */
109 # define __ldiv_t_defined 1
112 #if defined __USE_ISOC99 && !defined __lldiv_t_defined
113 /* Returned by `lldiv'. */
114 __extension__ typedef struct
116 long long int quot; /* Quotient. */
117 long long int rem; /* Remainder. */
119 # define __lldiv_t_defined 1
123 /* The largest number rand will return (same as INT_MAX). */
124 #define RAND_MAX 2147483647
127 /* We define these the same for all machines.
128 Changes from this to the outside world should be done in `_exit'. */
129 #define EXIT_FAILURE 1 /* Failing exit status. */
130 #define EXIT_SUCCESS 0 /* Successful exit status. */
133 #ifdef __UCLIBC_HAS_WCHAR__
134 /* Maximum length of a multibyte character in the current locale. */
135 #define MB_CUR_MAX (_stdlib_mb_cur_max ())
136 extern size_t _stdlib_mb_cur_max (void) __THROW;
139 #ifdef __UCLIBC_HAS_FLOATS__
140 /* Convert a string to a floating-point number. */
141 extern double atof (__const char *__nptr) __THROW __attribute_pure__;
142 #endif /* __UCLIBC_HAS_FLOATS__ */
143 /* Convert a string to an integer. */
144 extern int atoi (__const char *__nptr) __THROW __attribute_pure__;
145 /* Convert a string to a long integer. */
146 extern long int atol (__const char *__nptr) __THROW __attribute_pure__;
148 #if defined __USE_ISOC99 || (defined __GNUC__ && defined __USE_MISC)
149 /* Convert a string to a long long integer. */
150 __extension__ extern long long int atoll (__const char *__nptr)
151 __THROW __attribute_pure__;
154 #ifdef __UCLIBC_HAS_FLOATS__
155 /* Convert a string to a floating-point number. */
156 extern double strtod (__const char *__restrict __nptr,
157 char **__restrict __endptr) __THROW;
160 /* Likewise for `float' and `long double' sizes of floating-point numbers. */
161 extern float strtof (__const char *__restrict __nptr,
162 char **__restrict __endptr) __THROW;
164 extern long double strtold (__const char *__restrict __nptr,
165 char **__restrict __endptr) __THROW;
167 #endif /* __UCLIBC_HAS_FLOATS__ */
169 /* Convert a string to a long integer. */
170 extern long int strtol (__const char *__restrict __nptr,
171 char **__restrict __endptr, int __base) __THROW;
172 /* Convert a string to an unsigned long integer. */
173 extern unsigned long int strtoul (__const char *__restrict __nptr,
174 char **__restrict __endptr, int __base)
177 #if defined __GNUC__ && defined __USE_BSD
178 /* Convert a string to a quadword integer. */
180 extern long long int strtoq (__const char *__restrict __nptr,
181 char **__restrict __endptr, int __base) __THROW;
182 /* Convert a string to an unsigned quadword integer. */
184 extern unsigned long long int strtouq (__const char *__restrict __nptr,
185 char **__restrict __endptr, int __base)
187 #endif /* GCC and use BSD. */
189 #if defined __USE_ISOC99 || (defined __GNUC__ && defined __USE_MISC)
190 /* These functions will part of the standard C library in ISO C99. */
192 /* Convert a string to a quadword integer. */
194 extern long long int strtoll (__const char *__restrict __nptr,
195 char **__restrict __endptr, int __base) __THROW;
196 /* Convert a string to an unsigned quadword integer. */
198 extern unsigned long long int strtoull (__const char *__restrict __nptr,
199 char **__restrict __endptr, int __base)
201 #endif /* ISO C99 or GCC and use MISC. */
206 /* The concept of one static locale per category is not very well
207 thought out. Many applications will need to process its data using
208 information from several different locales. Another application is
209 the implementation of the internationalization handling in the
210 upcoming ISO C++ standard library. To support this another set of
211 the functions using locale data exist which have an additional
214 Attention: all these functions are *not* standardized in any form.
215 This is a proof-of-concept implementation. */
217 /* Structure for reentrant locale using functions. This is an
218 (almost) opaque type for the user level programs. */
219 # include <xlocale.h>
221 /* Special versions of the functions above which take the locale to
222 use as an additional parameter. */
223 extern long int __strtol_l (__const char *__restrict __nptr,
224 char **__restrict __endptr, int __base,
225 __locale_t __loc) __THROW;
227 extern unsigned long int __strtoul_l (__const char *__restrict __nptr,
228 char **__restrict __endptr,
229 int __base, __locale_t __loc) __THROW;
232 extern long long int __strtoll_l (__const char *__restrict __nptr,
233 char **__restrict __endptr, int __base,
234 __locale_t __loc) __THROW;
237 extern unsigned long long int __strtoull_l (__const char *__restrict __nptr,
238 char **__restrict __endptr,
239 int __base, __locale_t __loc)
242 extern double __strtod_l (__const char *__restrict __nptr,
243 char **__restrict __endptr, __locale_t __loc)
246 extern float __strtof_l (__const char *__restrict __nptr,
247 char **__restrict __endptr, __locale_t __loc) __THROW;
249 extern long double __strtold_l (__const char *__restrict __nptr,
250 char **__restrict __endptr,
251 __locale_t __loc) __THROW;
255 /* The internal entry points for `strtoX' take an extra flag argument
256 saying whether or not to parse locale-dependent number grouping. */
258 #ifdef __UCLIBC_HAS_FLOATS__
259 extern double __strtod_internal (__const char *__restrict __nptr,
260 char **__restrict __endptr, int __group)
262 extern float __strtof_internal (__const char *__restrict __nptr,
263 char **__restrict __endptr, int __group)
265 extern long double __strtold_internal (__const char *__restrict __nptr,
266 char **__restrict __endptr,
267 int __group) __THROW;
268 #endif /* __UCLIBC_HAS_FLOATS__ */
269 #ifndef __strtol_internal_defined
270 extern long int __strtol_internal (__const char *__restrict __nptr,
271 char **__restrict __endptr,
272 int __base, int __group) __THROW;
273 # define __strtol_internal_defined 1
275 #ifndef __strtoul_internal_defined
276 extern unsigned long int __strtoul_internal (__const char *__restrict __nptr,
277 char **__restrict __endptr,
278 int __base, int __group) __THROW;
279 # define __strtoul_internal_defined 1
281 #if defined __GNUC__ || defined __USE_ISOC99
282 # ifndef __strtoll_internal_defined
284 extern long long int __strtoll_internal (__const char *__restrict __nptr,
285 char **__restrict __endptr,
286 int __base, int __group) __THROW;
287 # define __strtoll_internal_defined 1
289 # ifndef __strtoull_internal_defined
291 extern unsigned long long int __strtoull_internal (__const char *
293 char **__restrict __endptr,
294 int __base, int __group)
296 # define __strtoull_internal_defined 1
300 #ifdef __USE_EXTERN_INLINES
301 /* Define inline functions which call the internal entry points. */
303 extern __inline double
304 strtod (__const char *__restrict __nptr, char **__restrict __endptr) __THROW
306 return __strtod_internal (__nptr, __endptr, 0);
308 extern __inline long int
309 strtol (__const char *__restrict __nptr, char **__restrict __endptr,
312 return __strtol_internal (__nptr, __endptr, __base, 0);
314 extern __inline unsigned long int
315 strtoul (__const char *__restrict __nptr, char **__restrict __endptr,
318 return __strtoul_internal (__nptr, __endptr, __base, 0);
322 extern __inline float
323 strtof (__const char *__restrict __nptr, char **__restrict __endptr) __THROW
325 return __strtof_internal (__nptr, __endptr, 0);
327 extern __inline long double
328 strtold (__const char *__restrict __nptr, char **__restrict __endptr) __THROW
330 return __strtold_internal (__nptr, __endptr, 0);
335 __extension__ extern __inline long long int
336 strtoq (__const char *__restrict __nptr, char **__restrict __endptr,
339 return __strtoll_internal (__nptr, __endptr, __base, 0);
341 __extension__ extern __inline unsigned long long int
342 strtouq (__const char *__restrict __nptr, char **__restrict __endptr,
345 return __strtoull_internal (__nptr, __endptr, __base, 0);
349 # if defined __USE_MISC || defined __USE_ISOC99
350 __extension__ extern __inline long long int
351 strtoll (__const char *__restrict __nptr, char **__restrict __endptr,
354 return __strtoll_internal (__nptr, __endptr, __base, 0);
356 __extension__ extern __inline unsigned long long int
357 strtoull (__const char * __restrict __nptr, char **__restrict __endptr,
360 return __strtoull_internal (__nptr, __endptr, __base, 0);
364 extern __inline double
365 atof (__const char *__nptr) __THROW
367 return strtod (__nptr, (char **) NULL);
370 atoi (__const char *__nptr) __THROW
372 return (int) strtol (__nptr, (char **) NULL, 10);
374 extern __inline long int
375 atol (__const char *__nptr) __THROW
377 return strtol (__nptr, (char **) NULL, 10);
380 # if defined __USE_MISC || defined __USE_ISOC99
381 __extension__ extern __inline long long int
382 atoll (__const char *__nptr) __THROW
384 return strtoll (__nptr, (char **) NULL, 10);
387 #endif /* Optimizing and Inlining. */
390 #if defined __USE_SVID || defined __USE_XOPEN_EXTENDED
391 /* Convert N to base 64 using the digits "./0-9A-Za-z", least-significant
392 digit first. Returns a pointer to static storage overwritten by the
394 extern char *l64a (long int __n) __THROW;
396 /* Read a number from a string S in base 64 as above. */
397 extern long int a64l (__const char *__s) __THROW __attribute_pure__;
400 # include <sys/types.h> /* we need int32_t... */
402 /* These are the functions that actually do things. The `random', `srandom',
403 `initstate' and `setstate' functions are those from BSD Unices.
404 The `rand' and `srand' functions are required by the ANSI standard.
405 We provide both interfaces to the same random number generator. */
406 /* Return a random long integer between 0 and RAND_MAX inclusive. */
407 extern long int random (void) __THROW;
409 /* Seed the random number generator with the given number. */
410 extern void srandom (unsigned int __seed) __THROW;
412 /* Initialize the random number generator to use state buffer STATEBUF,
413 of length STATELEN, and seed it with SEED. Optimal lengths are 8, 16,
414 32, 64, 128 and 256, the bigger the better; values less than 8 will
415 cause an error and values greater than 256 will be rounded down. */
416 extern char *initstate (unsigned int __seed, char *__statebuf,
417 size_t __statelen) __THROW;
419 /* Switch the random number generator to state buffer STATEBUF,
420 which should have been previously initialized by `initstate'. */
421 extern char *setstate (char *__statebuf) __THROW;
425 /* Reentrant versions of the `random' family of functions.
426 These functions all use the following data structure to contain
427 state, rather than global state variables. */
431 int32_t *fptr; /* Front pointer. */
432 int32_t *rptr; /* Rear pointer. */
433 int32_t *state; /* Array of state values. */
434 int rand_type; /* Type of random number generator. */
435 int rand_deg; /* Degree of random number generator. */
436 int rand_sep; /* Distance between front and rear. */
437 int32_t *end_ptr; /* Pointer behind state table. */
440 extern int random_r (struct random_data *__restrict __buf,
441 int32_t *__restrict __result) __THROW;
443 extern int srandom_r (unsigned int __seed, struct random_data *__buf) __THROW;
445 extern int initstate_r (unsigned int __seed, char *__restrict __statebuf,
447 struct random_data *__restrict __buf) __THROW;
449 extern int setstate_r (char *__restrict __statebuf,
450 struct random_data *__restrict __buf) __THROW;
451 # endif /* Use misc. */
452 #endif /* Use SVID || extended X/Open. */
455 /* Return a random integer between 0 and RAND_MAX inclusive. */
456 extern int rand (void) __THROW;
457 /* Seed the random number generator with the given number. */
458 extern void srand (unsigned int __seed) __THROW;
461 /* Reentrant interface according to POSIX.1. */
462 extern int rand_r (unsigned int *__seed) __THROW;
466 #if defined __USE_SVID || defined __USE_XOPEN
467 /* System V style 48-bit random number generator functions. */
469 #ifdef __UCLIBC_HAS_FLOATS__
470 /* Return non-negative, double-precision floating-point value in [0.0,1.0). */
471 extern double drand48 (void) __THROW;
472 extern double erand48 (unsigned short int __xsubi[3]) __THROW;
473 #endif /* __UCLIBC_HAS_FLOATS__ */
475 /* Return non-negative, long integer in [0,2^31). */
476 extern long int lrand48 (void) __THROW;
477 extern long int nrand48 (unsigned short int __xsubi[3]) __THROW;
479 /* Return signed, long integers in [-2^31,2^31). */
480 extern long int mrand48 (void) __THROW;
481 extern long int jrand48 (unsigned short int __xsubi[3]) __THROW;
483 /* Seed random number generator. */
484 extern void srand48 (long int __seedval) __THROW;
485 extern unsigned short int *seed48 (unsigned short int __seed16v[3]) __THROW;
486 extern void lcong48 (unsigned short int __param[7]) __THROW;
489 /* Data structure for communication with thread safe versions. This
490 type is to be regarded as opaque. It's only exported because users
491 have to allocate objects of this type. */
494 unsigned short int __x[3]; /* Current state. */
495 unsigned short int __old_x[3]; /* Old state. */
496 unsigned short int __c; /* Additive const. in congruential formula. */
497 unsigned short int __init; /* Flag for initializing. */
498 unsigned long long int __a; /* Factor in congruential formula. */
501 #ifdef __UCLIBC_HAS_FLOATS__
502 /* Return non-negative, double-precision floating-point value in [0.0,1.0). */
503 extern int drand48_r (struct drand48_data *__restrict __buffer,
504 double *__restrict __result) __THROW;
505 extern int erand48_r (unsigned short int __xsubi[3],
506 struct drand48_data *__restrict __buffer,
507 double *__restrict __result) __THROW;
508 #endif /* __UCLIBC_HAS_FLOATS__ */
510 /* Return non-negative, long integer in [0,2^31). */
511 extern int lrand48_r (struct drand48_data *__restrict __buffer,
512 long int *__restrict __result) __THROW;
513 extern int nrand48_r (unsigned short int __xsubi[3],
514 struct drand48_data *__restrict __buffer,
515 long int *__restrict __result) __THROW;
517 /* Return signed, long integers in [-2^31,2^31). */
518 extern int mrand48_r (struct drand48_data *__restrict __buffer,
519 long int *__restrict __result) __THROW;
520 extern int jrand48_r (unsigned short int __xsubi[3],
521 struct drand48_data *__restrict __buffer,
522 long int *__restrict __result) __THROW;
524 /* Seed random number generator. */
525 extern int srand48_r (long int __seedval, struct drand48_data *__buffer)
528 extern int seed48_r (unsigned short int __seed16v[3],
529 struct drand48_data *__buffer) __THROW;
531 extern int lcong48_r (unsigned short int __param[7],
532 struct drand48_data *__buffer) __THROW;
533 # endif /* Use misc. */
534 #endif /* Use SVID or X/Open. */
536 #endif /* don't just need malloc and calloc */
538 #ifndef __malloc_and_calloc_defined
539 #define __malloc_and_calloc_defined
540 /* Allocate SIZE bytes of memory. */
541 extern void *malloc (size_t __size) __THROW __attribute_malloc__;
542 /* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */
543 extern void *calloc (size_t __nmemb, size_t __size)
544 __THROW __attribute_malloc__;
547 #ifndef __need_malloc_and_calloc
548 /* Re-allocate the previously allocated block
549 in PTR, making the new block SIZE bytes long. */
550 extern void *realloc (void *__ptr, size_t __size) __THROW __attribute_malloc__;
551 /* Free a block allocated by `malloc', `realloc' or `calloc'. */
552 extern void free (void *__ptr) __THROW;
555 /* Free a block. An alias for `free'. (Sun Unices). */
556 extern void cfree (void *__ptr) __THROW;
557 #endif /* Use misc. */
559 #if defined __USE_GNU || defined __USE_BSD || defined __USE_MISC
561 #endif /* Use GNU, BSD, or misc. */
563 #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
564 /* Allocate SIZE bytes on a page boundary. The storage cannot be freed. */
565 extern void *valloc (size_t __size) __THROW __attribute_malloc__;
569 /* Allocate memory of SIZE bytes with an alignment of ALIGNMENT. */
570 extern int posix_memalign (void **__memptr, size_t __alignment, size_t __size)
571 __THROW __attribute_malloc__;
574 /* Abort execution and generate a core-dump. */
575 extern void abort (void) __THROW __attribute__ ((__noreturn__));
578 /* Register a function to be called when `exit' is called. */
579 extern int atexit (void (*__func) (void)) __THROW;
581 /* The following is used by uClibc in atexit.c and sysconf.c */
582 #define __UCLIBC_MAX_ATEXIT 20
586 /* Register a function to be called with the status
587 given to `exit' and the given argument. */
588 extern int on_exit (void (*__func) (int __status, void *__arg), void *__arg)
592 /* Call all functions registered with `atexit' and `on_exit',
593 in the reverse of the order in which they were registered
594 perform stdio cleanup, and terminate program execution with STATUS. */
595 extern void exit (int __status) __THROW __attribute__ ((__noreturn__));
598 /* Terminate the program with STATUS without calling any of the
599 functions registered with `atexit' or `on_exit'. */
600 extern void _Exit (int __status) __THROW __attribute__ ((__noreturn__));
604 /* Return the value of envariable NAME, or NULL if it doesn't exist. */
605 extern char *getenv (__const char *__name) __THROW;
607 /* This function is similar to the above but returns NULL if the
608 programs is running with SUID or SGID enabled. */
609 extern char *__secure_getenv (__const char *__name) __THROW;
611 #if defined __USE_SVID || defined __USE_XOPEN
612 /* The SVID says this is in <stdio.h>, but this seems a better place. */
613 /* Put STRING, which is of the form "NAME=VALUE", in the environment.
614 If there is no `=', remove NAME from the environment. */
615 extern int putenv (char *__string) __THROW;
618 #if defined __USE_BSD || defined __USE_XOPEN2K
619 /* Set NAME to VALUE in the environment.
620 If REPLACE is nonzero, overwrite an existing value. */
621 extern int setenv (__const char *__name, __const char *__value, int __replace)
624 /* Remove the variable NAME from the environment. */
625 extern int unsetenv (__const char *__name) __THROW;
629 /* The `clearenv' was planned to be added to POSIX.1 but probably
630 never made it. Nevertheless the POSIX.9 standard (POSIX bindings
631 for Fortran 77) requires this function. */
632 extern int clearenv (void) __THROW;
636 #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
637 /* Generate a unique temporary file name from TEMPLATE.
638 The last six characters of TEMPLATE must be "XXXXXX";
639 they are replaced with a string that makes the file name unique.
640 Returns TEMPLATE, or a null pointer if it cannot get a unique file name. */
641 extern char *mktemp (char *__template) __THROW;
643 /* Generate a unique temporary file name from TEMPLATE.
644 The last six characters of TEMPLATE must be "XXXXXX";
645 they are replaced with a string that makes the filename unique.
646 Returns a file descriptor open on the file for reading and writing,
647 or -1 if it cannot create a uniquely-named file. */
648 # ifndef __USE_FILE_OFFSET64
649 extern int mkstemp (char *__template) __THROW;
652 extern int __REDIRECT (mkstemp, (char *__template) __THROW, mkstemp64);
654 # define mkstemp mkstemp64
657 # ifdef __USE_LARGEFILE64
658 extern int mkstemp64 (char *__template) __THROW;
663 /* Create a unique temporary directory from TEMPLATE.
664 The last six characters of TEMPLATE must be "XXXXXX";
665 they are replaced with a string that makes the directory name unique.
666 Returns TEMPLATE, or a null pointer if it cannot get a unique name.
667 The directory is created mode 700. */
668 extern char *mkdtemp (char *__template) __THROW;
672 /* Execute the given line as a shell command. */
673 extern int system (__const char *__command) __THROW;
678 /* Return a malloc'd string containing the canonical absolute name of the
679 named file. The last file name component need not exist, and may be a
680 symlink to a nonexistent file. */
681 extern char *canonicalize_file_name (__const char *__name) __THROW;
684 #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
685 /* Return the canonical absolute name of file NAME. The last file name
686 component need not exist, and may be a symlink to a nonexistent file.
687 If RESOLVED is null, the result is malloc'd; otherwise, if the canonical
688 name is PATH_MAX chars or more, returns null with `errno' set to
689 ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars, returns the
691 extern char *realpath (__const char *__restrict __name,
692 char *__restrict __resolved) __THROW;
696 /* Shorthand for type of comparison functions. */
697 #ifndef __COMPAR_FN_T
698 # define __COMPAR_FN_T
699 typedef int (*__compar_fn_t) (__const void *, __const void *);
702 typedef __compar_fn_t comparison_fn_t;
706 /* Do a binary search for KEY in BASE, which consists of NMEMB elements
707 of SIZE bytes each, using COMPAR to perform the comparisons. */
708 extern void *bsearch (__const void *__key, __const void *__base,
709 size_t __nmemb, size_t __size, __compar_fn_t __compar);
711 /* Sort NMEMB elements of BASE, of SIZE bytes each,
712 using COMPAR to perform the comparisons. */
713 extern void qsort (void *__base, size_t __nmemb, size_t __size,
714 __compar_fn_t __compar);
717 /* Return the absolute value of X. */
718 extern int abs (int __x) __THROW __attribute__ ((__const__));
719 extern long int labs (long int __x) __THROW __attribute__ ((__const__));
721 __extension__ extern long long int llabs (long long int __x)
722 __THROW __attribute__ ((__const__));
726 /* Return the `div_t', `ldiv_t' or `lldiv_t' representation
727 of the value of NUMER over DENOM. */
728 /* GCC may have built-ins for these someday. */
729 extern div_t div (int __numer, int __denom)
730 __THROW __attribute__ ((__const__));
731 extern ldiv_t ldiv (long int __numer, long int __denom)
732 __THROW __attribute__ ((__const__));
734 __extension__ extern lldiv_t lldiv (long long int __numer,
735 long long int __denom)
736 __THROW __attribute__ ((__const__));
740 #ifdef __UCLIBC_HAS_FLOATS__
741 #if defined __USE_SVID || defined __USE_XOPEN_EXTENDED
742 /* Convert floating point numbers to strings. The returned values are
743 valid only until another call to the same function. */
745 /* Convert VALUE to a string with NDIGIT digits and return a pointer to
746 this. Set *DECPT with the position of the decimal character and *SIGN
747 with the sign of the number. */
748 extern char *ecvt (double __value, int __ndigit, int *__restrict __decpt,
749 int *__restrict __sign) __THROW;
751 /* Convert VALUE to a string rounded to NDIGIT decimal digits. Set *DECPT
752 with the position of the decimal character and *SIGN with the sign of
754 extern char *fcvt (double __value, int __ndigit, int *__restrict __decpt,
755 int *__restrict __sign) __THROW;
757 /* If possible convert VALUE to a string with NDIGIT significant digits.
758 Otherwise use exponential representation. The resulting string will
759 be written to BUF. */
760 extern char *gcvt (double __value, int __ndigit, char *__buf) __THROW;
764 /* Long double versions of above functions. */
765 extern char *qecvt (long double __value, int __ndigit,
766 int *__restrict __decpt, int *__restrict __sign) __THROW;
767 extern char *qfcvt (long double __value, int __ndigit,
768 int *__restrict __decpt, int *__restrict __sign) __THROW;
769 extern char *qgcvt (long double __value, int __ndigit, char *__buf) __THROW;
772 /* Reentrant version of the functions above which provide their own
774 extern int ecvt_r (double __value, int __ndigit, int *__restrict __decpt,
775 int *__restrict __sign, char *__restrict __buf,
776 size_t __len) __THROW;
777 extern int fcvt_r (double __value, int __ndigit, int *__restrict __decpt,
778 int *__restrict __sign, char *__restrict __buf,
779 size_t __len) __THROW;
781 extern int qecvt_r (long double __value, int __ndigit,
782 int *__restrict __decpt, int *__restrict __sign,
783 char *__restrict __buf, size_t __len) __THROW;
784 extern int qfcvt_r (long double __value, int __ndigit,
785 int *__restrict __decpt, int *__restrict __sign,
786 char *__restrict __buf, size_t __len) __THROW;
788 #endif /* use MISC || use X/Open Unix */
789 #endif /* __UCLIBC_HAS_FLOATS__ */
791 #ifdef __UCLIBC_HAS_WCHAR__
792 /* Return the length of the multibyte character
793 in S, which is no longer than N. */
794 extern int mblen (__const char *__s, size_t __n) __THROW;
795 /* Return the length of the given multibyte character,
796 putting its `wchar_t' representation in *PWC. */
797 extern int mbtowc (wchar_t *__restrict __pwc,
798 __const char *__restrict __s, size_t __n) __THROW;
799 /* Put the multibyte character represented
800 by WCHAR in S, returning its length. */
801 extern int wctomb (char *__s, wchar_t __wchar) __THROW;
804 /* Convert a multibyte string to a wide char string. */
805 extern size_t mbstowcs (wchar_t *__restrict __pwcs,
806 __const char *__restrict __s, size_t __n) __THROW;
807 /* Convert a wide char string to multibyte string. */
808 extern size_t wcstombs (char *__restrict __s,
809 __const wchar_t *__restrict __pwcs, size_t __n)
811 #endif /* def __UCLIBC_HAS_WCHAR__ */
814 /* Determine whether the string value of RESPONSE matches the affirmation
815 or negative response expression as specified by the LC_MESSAGES category
816 in the program's current locale. Returns 1 if affirmative, 0 if
817 negative, and -1 if not matching. */
818 extern int rpmatch (__const char *__response) __THROW;
822 #ifdef __USE_XOPEN_EXTENDED
823 /* Parse comma separated suboption from *OPTIONP and match against
824 strings in TOKENS. If found return index and set *VALUEP to
825 optional value introduced by an equal sign. If the suboption is
826 not part of TOKENS return in *VALUEP beginning of unknown
827 suboption. On exit *OPTIONP is set to the beginning of the next
828 token or at the terminating NUL character. */
829 extern int getsubopt (char **__restrict __optionp,
830 char *__const *__restrict __tokens,
831 char **__restrict __valuep) __THROW;
836 /* Setup DES tables according KEY. */
837 extern void setkey (__const char *__key) __THROW;
841 /* X/Open pseudo terminal handling. */
844 /* Return a master pseudo-terminal handle. */
845 extern int posix_openpt (int __oflag) __THROW;
849 /* The next four functions all take a master pseudo-tty fd and
850 perform an operation on the associated slave: */
852 /* Chown the slave to the calling user. */
853 extern int grantpt (int __fd) __THROW;
855 /* Release an internal lock so the slave can be opened.
856 Call after grantpt(). */
857 extern int unlockpt (int __fd) __THROW;
859 /* Return the pathname of the pseudo terminal slave assoicated with
860 the master FD is open on, or NULL on errors.
861 The returned storage is good until the next call to this function. */
862 extern char *ptsname (int __fd) __THROW;
866 /* Store at most BUFLEN characters of the pathname of the slave pseudo
867 terminal associated with the master FD is open on in BUF.
868 Return 0 on success, otherwise an error number. */
870 extern int ptsname_r (int __fd, char *__buf, size_t __buflen) __THROW;
873 /* Open a master pseudo terminal and return its file descriptor. */
874 extern int getpt (void) __THROW;
878 /* Put the 1 minute, 5 minute and 15 minute load averages into the first
879 NELEM elements of LOADAVG. Return the number written (never more than
880 three, but may be less than NELEM), or -1 if an error occurred. */
881 extern int getloadavg (double __loadavg[], int __nelem) __THROW;
884 #endif /* don't just need malloc and calloc */
885 #undef __need_malloc_and_calloc
889 #endif /* stdlib.h */