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;
257 /* The internal entry points for `strtoX' take an extra flag argument
258 saying whether or not to parse locale-dependent number grouping. */
260 #ifdef __UCLIBC_HAS_FLOATS__
261 extern double __strtod_internal (__const char *__restrict __nptr,
262 char **__restrict __endptr, int __group)
264 extern float __strtof_internal (__const char *__restrict __nptr,
265 char **__restrict __endptr, int __group)
267 extern long double __strtold_internal (__const char *__restrict __nptr,
268 char **__restrict __endptr,
269 int __group) __THROW;
270 #endif /* __UCLIBC_HAS_FLOATS__ */
271 #ifndef __strtol_internal_defined
272 extern long int __strtol_internal (__const char *__restrict __nptr,
273 char **__restrict __endptr,
274 int __base, int __group) __THROW;
275 # define __strtol_internal_defined 1
277 #ifndef __strtoul_internal_defined
278 extern unsigned long int __strtoul_internal (__const char *__restrict __nptr,
279 char **__restrict __endptr,
280 int __base, int __group) __THROW;
281 # define __strtoul_internal_defined 1
283 #if defined __GNUC__ || defined __USE_ISOC99
284 # ifndef __strtoll_internal_defined
286 extern long long int __strtoll_internal (__const char *__restrict __nptr,
287 char **__restrict __endptr,
288 int __base, int __group) __THROW;
289 # define __strtoll_internal_defined 1
291 # ifndef __strtoull_internal_defined
293 extern unsigned long long int __strtoull_internal (__const char *
295 char **__restrict __endptr,
296 int __base, int __group)
298 # define __strtoull_internal_defined 1
303 #ifdef __USE_EXTERN_INLINES
305 /* Define inline functions which call the internal entry points. */
307 extern __inline double
308 strtod (__const char *__restrict __nptr, char **__restrict __endptr) __THROW
310 return __strtod_internal (__nptr, __endptr, 0);
312 extern __inline long int
313 strtol (__const char *__restrict __nptr, char **__restrict __endptr,
316 return __strtol_internal (__nptr, __endptr, __base, 0);
318 extern __inline unsigned long int
319 strtoul (__const char *__restrict __nptr, char **__restrict __endptr,
322 return __strtoul_internal (__nptr, __endptr, __base, 0);
326 extern __inline float
327 strtof (__const char *__restrict __nptr, char **__restrict __endptr) __THROW
329 return __strtof_internal (__nptr, __endptr, 0);
331 extern __inline long double
332 strtold (__const char *__restrict __nptr, char **__restrict __endptr) __THROW
334 return __strtold_internal (__nptr, __endptr, 0);
339 __extension__ extern __inline long long int
340 strtoq (__const char *__restrict __nptr, char **__restrict __endptr,
343 return __strtoll_internal (__nptr, __endptr, __base, 0);
345 __extension__ extern __inline unsigned long long int
346 strtouq (__const char *__restrict __nptr, char **__restrict __endptr,
349 return __strtoull_internal (__nptr, __endptr, __base, 0);
353 # if defined __USE_MISC || defined __USE_ISOC99
354 __extension__ extern __inline long long int
355 strtoll (__const char *__restrict __nptr, char **__restrict __endptr,
358 return __strtoll_internal (__nptr, __endptr, __base, 0);
360 __extension__ extern __inline unsigned long long int
361 strtoull (__const char * __restrict __nptr, char **__restrict __endptr,
364 return __strtoull_internal (__nptr, __endptr, __base, 0);
369 extern __inline double
370 atof (__const char *__nptr) __THROW
372 return strtod (__nptr, (char **) NULL);
375 atoi (__const char *__nptr) __THROW
377 return (int) strtol (__nptr, (char **) NULL, 10);
379 extern __inline long int
380 atol (__const char *__nptr) __THROW
382 return strtol (__nptr, (char **) NULL, 10);
385 # if defined __USE_MISC || defined __USE_ISOC99
386 __extension__ extern __inline long long int
387 atoll (__const char *__nptr) __THROW
389 return strtoll (__nptr, (char **) NULL, 10);
392 #endif /* Optimizing and Inlining. */
395 #if defined __USE_SVID || defined __USE_XOPEN_EXTENDED
396 /* Convert N to base 64 using the digits "./0-9A-Za-z", least-significant
397 digit first. Returns a pointer to static storage overwritten by the
399 extern char *l64a (long int __n) __THROW;
401 /* Read a number from a string S in base 64 as above. */
402 extern long int a64l (__const char *__s) __THROW __attribute_pure__;
405 # include <sys/types.h> /* we need int32_t... */
407 /* These are the functions that actually do things. The `random', `srandom',
408 `initstate' and `setstate' functions are those from BSD Unices.
409 The `rand' and `srand' functions are required by the ANSI standard.
410 We provide both interfaces to the same random number generator. */
411 /* Return a random long integer between 0 and RAND_MAX inclusive. */
412 extern long int random (void) __THROW;
414 /* Seed the random number generator with the given number. */
415 extern void srandom (unsigned int __seed) __THROW;
417 /* Initialize the random number generator to use state buffer STATEBUF,
418 of length STATELEN, and seed it with SEED. Optimal lengths are 8, 16,
419 32, 64, 128 and 256, the bigger the better; values less than 8 will
420 cause an error and values greater than 256 will be rounded down. */
421 extern char *initstate (unsigned int __seed, char *__statebuf,
422 size_t __statelen) __THROW;
424 /* Switch the random number generator to state buffer STATEBUF,
425 which should have been previously initialized by `initstate'. */
426 extern char *setstate (char *__statebuf) __THROW;
430 /* Reentrant versions of the `random' family of functions.
431 These functions all use the following data structure to contain
432 state, rather than global state variables. */
436 int32_t *fptr; /* Front pointer. */
437 int32_t *rptr; /* Rear pointer. */
438 int32_t *state; /* Array of state values. */
439 int rand_type; /* Type of random number generator. */
440 int rand_deg; /* Degree of random number generator. */
441 int rand_sep; /* Distance between front and rear. */
442 int32_t *end_ptr; /* Pointer behind state table. */
445 extern int random_r (struct random_data *__restrict __buf,
446 int32_t *__restrict __result) __THROW;
448 extern int srandom_r (unsigned int __seed, struct random_data *__buf) __THROW;
450 extern int initstate_r (unsigned int __seed, char *__restrict __statebuf,
452 struct random_data *__restrict __buf) __THROW;
454 extern int setstate_r (char *__restrict __statebuf,
455 struct random_data *__restrict __buf) __THROW;
456 # endif /* Use misc. */
457 #endif /* Use SVID || extended X/Open. */
460 /* Return a random integer between 0 and RAND_MAX inclusive. */
461 extern int rand (void) __THROW;
462 /* Seed the random number generator with the given number. */
463 extern void srand (unsigned int __seed) __THROW;
466 /* Reentrant interface according to POSIX.1. */
467 extern int rand_r (unsigned int *__seed) __THROW;
471 #if defined __USE_SVID || defined __USE_XOPEN
472 /* System V style 48-bit random number generator functions. */
474 #ifdef __UCLIBC_HAS_FLOATS__
475 /* Return non-negative, double-precision floating-point value in [0.0,1.0). */
476 extern double drand48 (void) __THROW;
477 extern double erand48 (unsigned short int __xsubi[3]) __THROW;
478 #endif /* __UCLIBC_HAS_FLOATS__ */
480 /* Return non-negative, long integer in [0,2^31). */
481 extern long int lrand48 (void) __THROW;
482 extern long int nrand48 (unsigned short int __xsubi[3]) __THROW;
484 /* Return signed, long integers in [-2^31,2^31). */
485 extern long int mrand48 (void) __THROW;
486 extern long int jrand48 (unsigned short int __xsubi[3]) __THROW;
488 /* Seed random number generator. */
489 extern void srand48 (long int __seedval) __THROW;
490 extern unsigned short int *seed48 (unsigned short int __seed16v[3]) __THROW;
491 extern void lcong48 (unsigned short int __param[7]) __THROW;
494 /* Data structure for communication with thread safe versions. This
495 type is to be regarded as opaque. It's only exported because users
496 have to allocate objects of this type. */
499 unsigned short int __x[3]; /* Current state. */
500 unsigned short int __old_x[3]; /* Old state. */
501 unsigned short int __c; /* Additive const. in congruential formula. */
502 unsigned short int __init; /* Flag for initializing. */
503 unsigned long long int __a; /* Factor in congruential formula. */
506 #ifdef __UCLIBC_HAS_FLOATS__
507 /* Return non-negative, double-precision floating-point value in [0.0,1.0). */
508 extern int drand48_r (struct drand48_data *__restrict __buffer,
509 double *__restrict __result) __THROW;
510 extern int erand48_r (unsigned short int __xsubi[3],
511 struct drand48_data *__restrict __buffer,
512 double *__restrict __result) __THROW;
513 #endif /* __UCLIBC_HAS_FLOATS__ */
515 /* Return non-negative, long integer in [0,2^31). */
516 extern int lrand48_r (struct drand48_data *__restrict __buffer,
517 long int *__restrict __result) __THROW;
518 extern int nrand48_r (unsigned short int __xsubi[3],
519 struct drand48_data *__restrict __buffer,
520 long int *__restrict __result) __THROW;
522 /* Return signed, long integers in [-2^31,2^31). */
523 extern int mrand48_r (struct drand48_data *__restrict __buffer,
524 long int *__restrict __result) __THROW;
525 extern int jrand48_r (unsigned short int __xsubi[3],
526 struct drand48_data *__restrict __buffer,
527 long int *__restrict __result) __THROW;
529 /* Seed random number generator. */
530 extern int srand48_r (long int __seedval, struct drand48_data *__buffer)
533 extern int seed48_r (unsigned short int __seed16v[3],
534 struct drand48_data *__buffer) __THROW;
536 extern int lcong48_r (unsigned short int __param[7],
537 struct drand48_data *__buffer) __THROW;
538 # endif /* Use misc. */
539 #endif /* Use SVID or X/Open. */
541 #endif /* don't just need malloc and calloc */
543 #ifndef __malloc_and_calloc_defined
544 #define __malloc_and_calloc_defined
545 /* Allocate SIZE bytes of memory. */
546 extern void *malloc (size_t __size) __THROW __attribute_malloc__;
547 /* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */
548 extern void *calloc (size_t __nmemb, size_t __size)
549 __THROW __attribute_malloc__;
552 #ifndef __need_malloc_and_calloc
553 /* Re-allocate the previously allocated block
554 in PTR, making the new block SIZE bytes long. */
555 extern void *realloc (void *__ptr, size_t __size) __THROW __attribute_malloc__;
556 /* Free a block allocated by `malloc', `realloc' or `calloc'. */
557 extern void free (void *__ptr) __THROW;
560 /* Free a block. An alias for `free'. (Sun Unices). */
561 extern void cfree (void *__ptr) __THROW;
562 #endif /* Use misc. */
564 #if defined __USE_GNU || defined __USE_BSD || defined __USE_MISC
566 #endif /* Use GNU, BSD, or misc. */
568 #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
569 /* Allocate SIZE bytes on a page boundary. The storage cannot be freed. */
570 extern void *valloc (size_t __size) __THROW __attribute_malloc__;
574 /* Allocate memory of SIZE bytes with an alignment of ALIGNMENT. */
575 extern int posix_memalign (void **__memptr, size_t __alignment, size_t __size)
576 __THROW __attribute_malloc__;
579 /* Abort execution and generate a core-dump. */
580 extern void abort (void) __THROW __attribute__ ((__noreturn__));
583 /* Register a function to be called when `exit' is called. */
584 extern int atexit (void (*__func) (void)) __THROW;
586 /* The following is used by uClibc in atexit.c and sysconf.c */
587 /* We have no limit when __UCLIBC_DYNAMIC_ATEXIT__ is enabled. */
588 #ifdef __UCLIBC_DYNAMIC_ATEXIT__
589 # define __UCLIBC_MAX_ATEXIT INT_MAX
591 # define __UCLIBC_MAX_ATEXIT 20
596 /* Register a function to be called with the status
597 given to `exit' and the given argument. */
598 extern int on_exit (void (*__func) (int __status, void *__arg), void *__arg)
602 /* Call all functions registered with `atexit' and `on_exit',
603 in the reverse of the order in which they were registered
604 perform stdio cleanup, and terminate program execution with STATUS. */
605 extern void exit (int __status) __THROW __attribute__ ((__noreturn__));
608 /* Terminate the program with STATUS without calling any of the
609 functions registered with `atexit' or `on_exit'. */
610 extern void _Exit (int __status) __THROW __attribute__ ((__noreturn__));
614 /* Return the value of envariable NAME, or NULL if it doesn't exist. */
615 extern char *getenv (__const char *__name) __THROW;
617 /* This function is similar to the above but returns NULL if the
618 programs is running with SUID or SGID enabled. */
619 extern char *__secure_getenv (__const char *__name) __THROW;
621 #if defined __USE_SVID || defined __USE_XOPEN
622 /* The SVID says this is in <stdio.h>, but this seems a better place. */
623 /* Put STRING, which is of the form "NAME=VALUE", in the environment.
624 If there is no `=', remove NAME from the environment. */
625 extern int putenv (char *__string) __THROW;
628 #if defined __USE_BSD || defined __USE_XOPEN2K
629 /* Set NAME to VALUE in the environment.
630 If REPLACE is nonzero, overwrite an existing value. */
631 extern int setenv (__const char *__name, __const char *__value, int __replace)
634 /* Remove the variable NAME from the environment. */
635 extern int unsetenv (__const char *__name) __THROW;
639 /* The `clearenv' was planned to be added to POSIX.1 but probably
640 never made it. Nevertheless the POSIX.9 standard (POSIX bindings
641 for Fortran 77) requires this function. */
642 extern int clearenv (void) __THROW;
646 #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
647 /* Generate a unique temporary file name from TEMPLATE.
648 The last six characters of TEMPLATE must be "XXXXXX";
649 they are replaced with a string that makes the file name unique.
650 Returns TEMPLATE, or a null pointer if it cannot get a unique file name. */
651 extern char *mktemp (char *__template) __THROW;
653 /* Generate a unique temporary file name from TEMPLATE.
654 The last six characters of TEMPLATE must be "XXXXXX";
655 they are replaced with a string that makes the filename unique.
656 Returns a file descriptor open on the file for reading and writing,
657 or -1 if it cannot create a uniquely-named file. */
658 # ifndef __USE_FILE_OFFSET64
659 extern int mkstemp (char *__template) __THROW;
662 extern int __REDIRECT (mkstemp, (char *__template) __THROW, mkstemp64);
664 # define mkstemp mkstemp64
667 # ifdef __USE_LARGEFILE64
668 extern int mkstemp64 (char *__template) __THROW;
673 /* Create a unique temporary directory from TEMPLATE.
674 The last six characters of TEMPLATE must be "XXXXXX";
675 they are replaced with a string that makes the directory name unique.
676 Returns TEMPLATE, or a null pointer if it cannot get a unique name.
677 The directory is created mode 700. */
678 extern char *mkdtemp (char *__template) __THROW;
682 /* Execute the given line as a shell command. */
683 extern int system (__const char *__command) __THROW;
688 /* Return a malloc'd string containing the canonical absolute name of the
689 named file. The last file name component need not exist, and may be a
690 symlink to a nonexistent file. */
691 extern char *canonicalize_file_name (__const char *__name) __THROW;
694 #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
695 /* Return the canonical absolute name of file NAME. The last file name
696 component need not exist, and may be a symlink to a nonexistent file.
697 If RESOLVED is null, the result is malloc'd; otherwise, if the canonical
698 name is PATH_MAX chars or more, returns null with `errno' set to
699 ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars, returns the
701 extern char *realpath (__const char *__restrict __name,
702 char *__restrict __resolved) __THROW;
706 /* Shorthand for type of comparison functions. */
707 #ifndef __COMPAR_FN_T
708 # define __COMPAR_FN_T
709 typedef int (*__compar_fn_t) (__const void *, __const void *);
712 typedef __compar_fn_t comparison_fn_t;
716 /* Do a binary search for KEY in BASE, which consists of NMEMB elements
717 of SIZE bytes each, using COMPAR to perform the comparisons. */
718 extern void *bsearch (__const void *__key, __const void *__base,
719 size_t __nmemb, size_t __size, __compar_fn_t __compar);
721 /* Sort NMEMB elements of BASE, of SIZE bytes each,
722 using COMPAR to perform the comparisons. */
723 extern void qsort (void *__base, size_t __nmemb, size_t __size,
724 __compar_fn_t __compar);
727 /* Return the absolute value of X. */
728 extern int abs (int __x) __THROW __attribute__ ((__const__));
729 extern long int labs (long int __x) __THROW __attribute__ ((__const__));
731 __extension__ extern long long int llabs (long long int __x)
732 __THROW __attribute__ ((__const__));
736 /* Return the `div_t', `ldiv_t' or `lldiv_t' representation
737 of the value of NUMER over DENOM. */
738 /* GCC may have built-ins for these someday. */
739 extern div_t div (int __numer, int __denom)
740 __THROW __attribute__ ((__const__));
741 extern ldiv_t ldiv (long int __numer, long int __denom)
742 __THROW __attribute__ ((__const__));
744 __extension__ extern lldiv_t lldiv (long long int __numer,
745 long long int __denom)
746 __THROW __attribute__ ((__const__));
751 #ifdef __UCLIBC_HAS_FLOATS__
752 #if defined __USE_SVID || defined __USE_XOPEN_EXTENDED
753 /* Convert floating point numbers to strings. The returned values are
754 valid only until another call to the same function. */
756 /* Convert VALUE to a string with NDIGIT digits and return a pointer to
757 this. Set *DECPT with the position of the decimal character and *SIGN
758 with the sign of the number. */
759 extern char *ecvt (double __value, int __ndigit, int *__restrict __decpt,
760 int *__restrict __sign) __THROW;
762 /* Convert VALUE to a string rounded to NDIGIT decimal digits. Set *DECPT
763 with the position of the decimal character and *SIGN with the sign of
765 extern char *fcvt (double __value, int __ndigit, int *__restrict __decpt,
766 int *__restrict __sign) __THROW;
768 /* If possible convert VALUE to a string with NDIGIT significant digits.
769 Otherwise use exponential representation. The resulting string will
770 be written to BUF. */
771 extern char *gcvt (double __value, int __ndigit, char *__buf) __THROW;
775 /* Long double versions of above functions. */
776 extern char *qecvt (long double __value, int __ndigit,
777 int *__restrict __decpt, int *__restrict __sign) __THROW;
778 extern char *qfcvt (long double __value, int __ndigit,
779 int *__restrict __decpt, int *__restrict __sign) __THROW;
780 extern char *qgcvt (long double __value, int __ndigit, char *__buf) __THROW;
783 /* Reentrant version of the functions above which provide their own
785 extern int ecvt_r (double __value, int __ndigit, int *__restrict __decpt,
786 int *__restrict __sign, char *__restrict __buf,
787 size_t __len) __THROW;
788 extern int fcvt_r (double __value, int __ndigit, int *__restrict __decpt,
789 int *__restrict __sign, char *__restrict __buf,
790 size_t __len) __THROW;
792 extern int qecvt_r (long double __value, int __ndigit,
793 int *__restrict __decpt, int *__restrict __sign,
794 char *__restrict __buf, size_t __len) __THROW;
795 extern int qfcvt_r (long double __value, int __ndigit,
796 int *__restrict __decpt, int *__restrict __sign,
797 char *__restrict __buf, size_t __len) __THROW;
799 #endif /* use MISC || use X/Open Unix */
800 #endif /* __UCLIBC_HAS_FLOATS__ */
803 #ifdef __UCLIBC_HAS_WCHAR__
804 /* Return the length of the multibyte character
805 in S, which is no longer than N. */
806 extern int mblen (__const char *__s, size_t __n) __THROW;
807 /* Return the length of the given multibyte character,
808 putting its `wchar_t' representation in *PWC. */
809 extern int mbtowc (wchar_t *__restrict __pwc,
810 __const char *__restrict __s, size_t __n) __THROW;
811 /* Put the multibyte character represented
812 by WCHAR in S, returning its length. */
813 extern int wctomb (char *__s, wchar_t __wchar) __THROW;
816 /* Convert a multibyte string to a wide char string. */
817 extern size_t mbstowcs (wchar_t *__restrict __pwcs,
818 __const char *__restrict __s, size_t __n) __THROW;
819 /* Convert a wide char string to multibyte string. */
820 extern size_t wcstombs (char *__restrict __s,
821 __const wchar_t *__restrict __pwcs, size_t __n)
823 #endif /* def __UCLIBC_HAS_WCHAR__ */
826 /* Determine whether the string value of RESPONSE matches the affirmation
827 or negative response expression as specified by the LC_MESSAGES category
828 in the program's current locale. Returns 1 if affirmative, 0 if
829 negative, and -1 if not matching. */
830 extern int rpmatch (__const char *__response) __THROW;
834 #ifdef __USE_XOPEN_EXTENDED
835 /* Parse comma separated suboption from *OPTIONP and match against
836 strings in TOKENS. If found return index and set *VALUEP to
837 optional value introduced by an equal sign. If the suboption is
838 not part of TOKENS return in *VALUEP beginning of unknown
839 suboption. On exit *OPTIONP is set to the beginning of the next
840 token or at the terminating NUL character. */
841 extern int getsubopt (char **__restrict __optionp,
842 char *__const *__restrict __tokens,
843 char **__restrict __valuep) __THROW;
848 /* Setup DES tables according KEY. */
849 extern void setkey (__const char *__key) __THROW;
853 /* X/Open pseudo terminal handling. */
856 /* Return a master pseudo-terminal handle. */
857 extern int posix_openpt (int __oflag) __THROW;
861 /* The next four functions all take a master pseudo-tty fd and
862 perform an operation on the associated slave: */
864 /* Chown the slave to the calling user. */
865 extern int grantpt (int __fd) __THROW;
867 /* Release an internal lock so the slave can be opened.
868 Call after grantpt(). */
869 extern int unlockpt (int __fd) __THROW;
871 /* Return the pathname of the pseudo terminal slave assoicated with
872 the master FD is open on, or NULL on errors.
873 The returned storage is good until the next call to this function. */
874 extern char *ptsname (int __fd) __THROW;
878 /* Store at most BUFLEN characters of the pathname of the slave pseudo
879 terminal associated with the master FD is open on in BUF.
880 Return 0 on success, otherwise an error number. */
882 extern int ptsname_r (int __fd, char *__buf, size_t __buflen) __THROW;
885 /* Open a master pseudo terminal and return its file descriptor. */
886 extern int getpt (void) __THROW;
890 /* Put the 1 minute, 5 minute and 15 minute load averages into the first
891 NELEM elements of LOADAVG. Return the number written (never more than
892 three, but may be less than NELEM), or -1 if an error occurred. */
893 extern int getloadavg (double __loadavg[], int __nelem) __THROW;
896 #endif /* don't just need malloc and calloc */
897 #undef __need_malloc_and_calloc
901 #endif /* stdlib.h */