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;
148 libc_hidden_proto(_stdlib_mb_cur_max)
152 __BEGIN_NAMESPACE_STD
153 #ifdef __UCLIBC_HAS_FLOATS__
154 /* Convert a string to a floating-point number. */
155 extern double atof (__const char *__nptr)
156 __THROW __attribute_pure__ __nonnull ((1)) __wur;
157 #endif /* __UCLIBC_HAS_FLOATS__ */
158 /* Convert a string to an integer. */
159 extern int atoi (__const char *__nptr)
160 __THROW __attribute_pure__ __nonnull ((1)) __wur;
161 libc_hidden_proto(atoi)
162 /* Convert a string to a long integer. */
163 extern long int atol (__const char *__nptr)
164 __THROW __attribute_pure__ __nonnull ((1)) __wur;
165 libc_hidden_proto(atol)
168 #if defined __USE_ISOC99 || defined __USE_MISC
169 __BEGIN_NAMESPACE_C99
170 /* Convert a string to a long long integer. */
171 __extension__ extern long long int atoll (__const char *__nptr)
172 __THROW __attribute_pure__ __nonnull ((1)) __wur;
176 #ifdef __UCLIBC_HAS_FLOATS__
177 __BEGIN_NAMESPACE_STD
178 /* Convert a string to a floating-point number. */
179 extern double strtod (__const char *__restrict __nptr,
180 char **__restrict __endptr)
181 __THROW __nonnull ((1)) __wur;
182 libc_hidden_proto(strtod)
186 __BEGIN_NAMESPACE_C99
187 /* Likewise for `float' and `long double' sizes of floating-point numbers. */
188 extern float strtof (__const char *__restrict __nptr,
189 char **__restrict __endptr) __THROW __nonnull ((1)) __wur;
191 extern long double strtold (__const char *__restrict __nptr,
192 char **__restrict __endptr)
193 __THROW __nonnull ((1)) __wur;
196 #endif /* __UCLIBC_HAS_FLOATS__ */
198 __BEGIN_NAMESPACE_STD
199 /* Convert a string to a long integer. */
200 extern long int strtol (__const char *__restrict __nptr,
201 char **__restrict __endptr, int __base)
202 __THROW __nonnull ((1)) __wur;
203 libc_hidden_proto(strtol)
204 /* Convert a string to an unsigned long integer. */
205 extern unsigned long int strtoul (__const char *__restrict __nptr,
206 char **__restrict __endptr, int __base)
207 __THROW __nonnull ((1)) __wur;
208 libc_hidden_proto(strtoul)
212 /* Convert a string to a quadword integer. */
214 extern long long int strtoq (__const char *__restrict __nptr,
215 char **__restrict __endptr, int __base)
216 __THROW __nonnull ((1)) __wur;
217 /* Convert a string to an unsigned quadword integer. */
219 extern unsigned long long int strtouq (__const char *__restrict __nptr,
220 char **__restrict __endptr, int __base)
221 __THROW __nonnull ((1)) __wur;
222 #endif /* GCC and use BSD. */
224 #if defined __USE_ISOC99 || defined __USE_MISC
225 __BEGIN_NAMESPACE_C99
226 /* Convert a string to a quadword integer. */
228 extern long long int strtoll (__const char *__restrict __nptr,
229 char **__restrict __endptr, int __base)
230 __THROW __nonnull ((1)) __wur;
231 libc_hidden_proto(strtoll)
232 /* Convert a string to an unsigned quadword integer. */
234 extern unsigned long long int strtoull (__const char *__restrict __nptr,
235 char **__restrict __endptr, int __base)
236 __THROW __nonnull ((1)) __wur;
238 #endif /* ISO C99 or GCC and use MISC. */
241 #ifdef __UCLIBC_HAS_XLOCALE__
243 /* The concept of one static locale per category is not very well
244 thought out. Many applications will need to process its data using
245 information from several different locales. Another application is
246 the implementation of the internationalization handling in the
247 upcoming ISO C++ standard library. To support this another set of
248 the functions using locale data exist which have an additional
251 Attention: all these functions are *not* standardized in any form.
252 This is a proof-of-concept implementation. */
254 /* Structure for reentrant locale using functions. This is an
255 (almost) opaque type for the user level programs. */
256 # include <xlocale.h>
258 /* Special versions of the functions above which take the locale to
259 use as an additional parameter. */
260 extern long int strtol_l (__const char *__restrict __nptr,
261 char **__restrict __endptr, int __base,
262 __locale_t __loc) __THROW __nonnull ((1, 4)) __wur;
263 libc_hidden_proto(strtol_l)
265 extern unsigned long int strtoul_l (__const char *__restrict __nptr,
266 char **__restrict __endptr,
267 int __base, __locale_t __loc)
268 __THROW __nonnull ((1, 4)) __wur;
269 libc_hidden_proto(strtoul_l)
272 extern long long int strtoll_l (__const char *__restrict __nptr,
273 char **__restrict __endptr, int __base,
275 __THROW __nonnull ((1, 4)) __wur;
278 extern unsigned long long int strtoull_l (__const char *__restrict __nptr,
279 char **__restrict __endptr,
280 int __base, __locale_t __loc)
281 __THROW __nonnull ((1, 4)) __wur;
283 #ifdef __UCLIBC_HAS_FLOATS__
284 extern double strtod_l (__const char *__restrict __nptr,
285 char **__restrict __endptr, __locale_t __loc)
286 __THROW __nonnull ((1, 3)) __wur;
288 extern float strtof_l (__const char *__restrict __nptr,
289 char **__restrict __endptr, __locale_t __loc)
290 __THROW __nonnull ((1, 3)) __wur;
292 extern long double strtold_l (__const char *__restrict __nptr,
293 char **__restrict __endptr,
295 __THROW __nonnull ((1, 3)) __wur;
296 #endif /* __UCLIBC_HAS_FLOATS__ */
299 #endif /* __UCLIBC_HAS_XLOCALE__ */
302 #if defined __USE_SVID || defined __USE_XOPEN_EXTENDED
303 /* Convert N to base 64 using the digits "./0-9A-Za-z", least-significant
304 digit first. Returns a pointer to static storage overwritten by the
306 extern char *l64a (long int __n) __THROW __wur;
308 /* Read a number from a string S in base 64 as above. */
309 extern long int a64l (__const char *__s)
310 __THROW __attribute_pure__ __nonnull ((1)) __wur;
312 #endif /* Use SVID || extended X/Open. */
314 #if defined __USE_SVID || defined __USE_XOPEN_EXTENDED || defined __USE_BSD
315 # include <sys/types.h> /* we need int32_t... */
317 /* These are the functions that actually do things. The `random', `srandom',
318 `initstate' and `setstate' functions are those from BSD Unices.
319 The `rand' and `srand' functions are required by the ANSI standard.
320 We provide both interfaces to the same random number generator. */
321 /* Return a random long integer between 0 and RAND_MAX inclusive. */
322 extern long int random (void) __THROW;
323 libc_hidden_proto(random)
325 /* Seed the random number generator with the given number. */
326 extern void srandom (unsigned int __seed) __THROW;
328 /* Initialize the random number generator to use state buffer STATEBUF,
329 of length STATELEN, and seed it with SEED. Optimal lengths are 8, 16,
330 32, 64, 128 and 256, the bigger the better; values less than 8 will
331 cause an error and values greater than 256 will be rounded down. */
332 extern char *initstate (unsigned int __seed, char *__statebuf,
333 size_t __statelen) __THROW __nonnull ((2));
335 /* Switch the random number generator to state buffer STATEBUF,
336 which should have been previously initialized by `initstate'. */
337 extern char *setstate (char *__statebuf) __THROW __nonnull ((1));
341 /* Reentrant versions of the `random' family of functions.
342 These functions all use the following data structure to contain
343 state, rather than global state variables. */
347 int32_t *fptr; /* Front pointer. */
348 int32_t *rptr; /* Rear pointer. */
349 int32_t *state; /* Array of state values. */
350 /* random_r.c, TYPE_x, DEG_x, SEP_x - small enough for int8_t */
351 int8_t rand_type; /* Type of random number generator. */
352 int8_t rand_deg; /* Degree of random number generator. */
353 int8_t rand_sep; /* Distance between front and rear. */
354 int32_t *end_ptr; /* Pointer behind state table. */
357 extern int random_r (struct random_data *__restrict __buf,
358 int32_t *__restrict __result) __THROW __nonnull ((1, 2));
359 libc_hidden_proto(random_r)
361 extern int srandom_r (unsigned int __seed, struct random_data *__buf)
362 __THROW __nonnull ((2));
363 libc_hidden_proto(srandom_r)
365 extern int initstate_r (unsigned int __seed, char *__restrict __statebuf,
367 struct random_data *__restrict __buf)
368 __THROW __nonnull ((2, 4));
369 libc_hidden_proto(initstate_r)
371 extern int setstate_r (char *__restrict __statebuf,
372 struct random_data *__restrict __buf)
373 __THROW __nonnull ((1, 2));
374 libc_hidden_proto(setstate_r)
375 # endif /* Use misc. */
376 #endif /* Use SVID || extended X/Open || BSD. */
379 __BEGIN_NAMESPACE_STD
380 /* Return a random integer between 0 and RAND_MAX inclusive. */
381 extern int rand (void) __THROW;
382 /* Seed the random number generator with the given number. */
383 extern void srand (unsigned int __seed) __THROW;
387 /* Reentrant interface according to POSIX.1. */
388 extern int rand_r (unsigned int *__seed) __THROW;
392 #if defined __USE_SVID || defined __USE_XOPEN
393 /* System V style 48-bit random number generator functions. */
395 #ifdef __UCLIBC_HAS_FLOATS__
396 /* Return non-negative, double-precision floating-point value in [0.0,1.0). */
397 extern double drand48 (void) __THROW;
398 extern double erand48 (unsigned short int __xsubi[3]) __THROW __nonnull ((1));
399 #endif /* __UCLIBC_HAS_FLOATS__ */
401 /* Return non-negative, long integer in [0,2^31). */
402 extern long int lrand48 (void) __THROW;
403 extern long int nrand48 (unsigned short int __xsubi[3])
404 __THROW __nonnull ((1));
406 /* Return signed, long integers in [-2^31,2^31). */
407 extern long int mrand48 (void) __THROW;
408 extern long int jrand48 (unsigned short int __xsubi[3])
409 __THROW __nonnull ((1));
411 /* Seed random number generator. */
412 extern void srand48 (long int __seedval) __THROW;
413 extern unsigned short int *seed48 (unsigned short int __seed16v[3])
414 __THROW __nonnull ((1));
415 extern void lcong48 (unsigned short int __param[7]) __THROW __nonnull ((1));
418 /* Data structure for communication with thread safe versions. This
419 type is to be regarded as opaque. It's only exported because users
420 have to allocate objects of this type. */
423 unsigned short int __x[3]; /* Current state. */
424 unsigned short int __old_x[3]; /* Old state. */
425 unsigned short int __c; /* Additive const. in congruential formula. */
426 unsigned short int __init; /* Flag for initializing. */
427 unsigned long long int __a; /* Factor in congruential formula. */
430 #ifdef __UCLIBC_HAS_FLOATS__
431 /* Return non-negative, double-precision floating-point value in [0.0,1.0). */
432 extern int drand48_r (struct drand48_data *__restrict __buffer,
433 double *__restrict __result) __THROW __nonnull ((1, 2));
434 extern int erand48_r (unsigned short int __xsubi[3],
435 struct drand48_data *__restrict __buffer,
436 double *__restrict __result) __THROW __nonnull ((1, 2));
437 libc_hidden_proto(erand48_r)
438 #endif /* __UCLIBC_HAS_FLOATS__ */
440 /* Return non-negative, long integer in [0,2^31). */
441 extern int lrand48_r (struct drand48_data *__restrict __buffer,
442 long int *__restrict __result)
443 __THROW __nonnull ((1, 2));
444 libc_hidden_proto(lrand48_r)
445 extern int nrand48_r (unsigned short int __xsubi[3],
446 struct drand48_data *__restrict __buffer,
447 long int *__restrict __result)
448 __THROW __nonnull ((1, 2));
449 libc_hidden_proto(nrand48_r)
451 /* Return signed, long integers in [-2^31,2^31). */
452 extern int mrand48_r (struct drand48_data *__restrict __buffer,
453 long int *__restrict __result)
454 __THROW __nonnull ((1, 2));
455 extern int jrand48_r (unsigned short int __xsubi[3],
456 struct drand48_data *__restrict __buffer,
457 long int *__restrict __result)
458 __THROW __nonnull ((1, 2));
459 libc_hidden_proto(jrand48_r)
461 /* Seed random number generator. */
462 extern int srand48_r (long int __seedval, struct drand48_data *__buffer)
463 __THROW __nonnull ((2));
464 libc_hidden_proto(srand48_r)
466 extern int seed48_r (unsigned short int __seed16v[3],
467 struct drand48_data *__buffer) __THROW __nonnull ((1, 2));
468 libc_hidden_proto(seed48_r)
470 extern int lcong48_r (unsigned short int __param[7],
471 struct drand48_data *__buffer)
472 __THROW __nonnull ((1, 2));
473 # endif /* Use misc. */
474 #endif /* Use SVID or X/Open. */
476 #endif /* don't just need malloc and calloc */
478 #ifndef __malloc_and_calloc_defined
479 # define __malloc_and_calloc_defined
480 __BEGIN_NAMESPACE_STD
481 /* Allocate SIZE bytes of memory. */
482 extern void *malloc (size_t __size) __THROW __attribute_malloc__ __wur;
483 /* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */
484 extern void *calloc (size_t __nmemb, size_t __size)
485 __THROW __attribute_malloc__ __wur;
489 #ifndef __need_malloc_and_calloc
490 __BEGIN_NAMESPACE_STD
491 /* Re-allocate the previously allocated block
492 in PTR, making the new block SIZE bytes long. */
493 extern void *realloc (void *__ptr, size_t __size)
494 __THROW __attribute_malloc__ __attribute_warn_unused_result__;
495 /* Free a block allocated by `malloc', `realloc' or `calloc'. */
496 extern void free (void *__ptr) __THROW;
500 /* Free a block. An alias for `free'. (Sun Unices). */
501 extern void cfree (void *__ptr) __THROW;
502 #endif /* Use misc. */
504 #if defined __USE_GNU || defined __USE_BSD || defined __USE_MISC
506 #endif /* Use GNU, BSD, or misc. */
508 #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
509 /* Allocate SIZE bytes on a page boundary. The storage cannot be freed. */
510 extern void *valloc (size_t __size) __THROW __attribute_malloc__ __wur;
513 #if defined __USE_XOPEN2K && defined __UCLIBC_HAS_ADVANCED_REALTIME__
514 /* Allocate memory of SIZE bytes with an alignment of ALIGNMENT. */
515 extern int posix_memalign (void **__memptr, size_t __alignment, size_t __size)
516 __THROW __nonnull ((1)) __wur;
519 __BEGIN_NAMESPACE_STD
520 /* Abort execution and generate a core-dump. */
521 extern void abort (void) __THROW __attribute__ ((__noreturn__));
522 libc_hidden_proto(abort)
525 /* Register a function to be called when `exit' is called. */
526 extern int atexit (void (*__func) (void)) __THROW __nonnull ((1));
530 /* Register a function to be called with the status
531 given to `exit' and the given argument. */
532 extern int on_exit (void (*__func) (int __status, void *__arg), void *__arg)
533 __THROW __nonnull ((1));
536 __BEGIN_NAMESPACE_STD
537 /* Call all functions registered with `atexit' and `on_exit',
538 in the reverse of the order in which they were registered
539 perform stdio cleanup, and terminate program execution with STATUS. */
540 extern void exit (int __status) __THROW __attribute__ ((__noreturn__));
541 libc_hidden_proto(exit)
545 __BEGIN_NAMESPACE_C99
546 /* Terminate the program with STATUS without calling any of the
547 functions registered with `atexit' or `on_exit'. */
548 extern void _Exit (int __status) __THROW __attribute__ ((__noreturn__));
553 __BEGIN_NAMESPACE_STD
554 /* Return the value of envariable NAME, or NULL if it doesn't exist. */
555 extern char *getenv (__const char *__name) __THROW __nonnull ((1)) __wur;
556 libc_hidden_proto(getenv)
559 /* This function is similar to the above but returns NULL if the
560 programs is running with SUID or SGID enabled. */
561 extern char *__secure_getenv (__const char *__name)
562 __THROW __nonnull ((1)) __wur;
564 #if defined __USE_SVID || defined __USE_XOPEN
565 /* The SVID says this is in <stdio.h>, but this seems a better place. */
566 /* Put STRING, which is of the form "NAME=VALUE", in the environment.
567 If there is no `=', remove NAME from the environment. */
568 extern int putenv (char *__string) __THROW __nonnull ((1));
571 #if defined __USE_BSD || defined __USE_XOPEN2K
572 /* Set NAME to VALUE in the environment.
573 If REPLACE is nonzero, overwrite an existing value. */
574 extern int setenv (__const char *__name, __const char *__value, int __replace)
575 __THROW __nonnull ((2));
576 libc_hidden_proto(setenv)
578 /* Remove the variable NAME from the environment. */
579 extern int unsetenv (__const char *__name) __THROW;
580 libc_hidden_proto(unsetenv)
583 /* The following is used by uClibc in atexit.c and sysconf.c */
584 /* We have no limit when __UCLIBC_DYNAMIC_ATEXIT__ is enabled. */
585 #ifdef __UCLIBC_DYNAMIC_ATEXIT__
586 # define __UCLIBC_MAX_ATEXIT INT_MAX
588 # define __UCLIBC_MAX_ATEXIT 20
593 /* The `clearenv' was planned to be added to POSIX.1 but probably
594 never made it. Nevertheless the POSIX.9 standard (POSIX bindings
595 for Fortran 77) requires this function. */
596 extern int clearenv (void) __THROW;
600 #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
601 /* Generate a unique temporary file name from TEMPLATE.
602 The last six characters of TEMPLATE must be "XXXXXX";
603 they are replaced with a string that makes the file name unique.
604 Returns TEMPLATE, or a null pointer if it cannot get a unique file name. */
605 extern char *mktemp (char *__template) __THROW __nonnull ((1)) __wur;
607 /* Generate a unique temporary file name from TEMPLATE.
608 The last six characters of TEMPLATE must be "XXXXXX";
609 they are replaced with a string that makes the filename unique.
610 Returns a file descriptor open on the file for reading and writing,
611 or -1 if it cannot create a uniquely-named file.
613 This function is a possible cancellation points and therefore not
614 marked with __THROW. */
615 # ifndef __USE_FILE_OFFSET64
616 extern int mkstemp (char *__template) __nonnull ((1)) __wur;
619 extern int __REDIRECT (mkstemp, (char *__template), mkstemp64)
620 __nonnull ((1)) __wur;
622 # define mkstemp mkstemp64
625 # ifdef __USE_LARGEFILE64
626 extern int mkstemp64 (char *__template) __nonnull ((1)) __wur;
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)) __wur;
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) __wur;
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)) __wur;
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 /* we choose to handle __resolved==NULL as crash :) */
665 extern char *realpath (__const char *__restrict __name,
666 char *__restrict __resolved) __THROW __wur __nonnull((2));
670 /* Shorthand for type of comparison functions. */
671 #ifndef __COMPAR_FN_T
672 # define __COMPAR_FN_T
673 typedef int (*__compar_fn_t) (__const void *, __const void *);
676 typedef __compar_fn_t comparison_fn_t;
680 __BEGIN_NAMESPACE_STD
681 /* Do a binary search for KEY in BASE, which consists of NMEMB elements
682 of SIZE bytes each, using COMPAR to perform the comparisons. */
683 extern void *bsearch (__const void *__key, __const void *__base,
684 size_t __nmemb, size_t __size, __compar_fn_t __compar)
685 __nonnull ((1, 2, 5)) __wur;
687 /* Sort NMEMB elements of BASE, of SIZE bytes each,
688 using COMPAR to perform the comparisons. */
689 extern void qsort (void *__base, size_t __nmemb, size_t __size,
690 __compar_fn_t __compar) __nonnull ((1, 4));
691 libc_hidden_proto(qsort)
694 /* Return the absolute value of X. */
695 extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur;
696 extern long int labs (long int __x) __THROW __attribute__ ((__const__)) __wur;
700 __extension__ extern long long int llabs (long long int __x)
701 __THROW __attribute__ ((__const__)) __wur;
705 __BEGIN_NAMESPACE_STD
706 /* Return the `div_t', `ldiv_t' or `lldiv_t' representation
707 of the value of NUMER over DENOM. */
708 /* GCC may have built-ins for these someday. */
709 extern div_t div (int __numer, int __denom)
710 __THROW __attribute__ ((__const__)) __wur;
711 extern ldiv_t ldiv (long int __numer, long int __denom)
712 __THROW __attribute__ ((__const__)) __wur;
716 __BEGIN_NAMESPACE_C99
717 __extension__ extern lldiv_t lldiv (long long int __numer,
718 long long int __denom)
719 __THROW __attribute__ ((__const__)) __wur;
724 #if defined __USE_SVID || defined __USE_XOPEN_EXTENDED || defined __USE_BSD
725 /* Convert floating point numbers to strings. The returned values are
726 valid only until another call to the same function. */
728 # ifdef __UCLIBC_SUSV3_LEGACY__
731 /* Convert VALUE to a string with NDIGIT digits and return a pointer to
732 this. Set *DECPT with the position of the decimal character and *SIGN
733 with the sign of the number. */
734 extern char *ecvt (double __value, int __ndigit, int *__restrict __decpt,
735 int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur;
737 /* Convert VALUE to a string rounded to NDIGIT decimal digits. Set *DECPT
738 with the position of the decimal character and *SIGN with the sign of
740 extern char *fcvt (double __value, int __ndigit, int *__restrict __decpt,
741 int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur;
744 /* If possible convert VALUE to a string with NDIGIT significant digits.
745 Otherwise use exponential representation. The resulting string will
746 be written to BUF. */
747 extern char *gcvt (double __value, int __ndigit, char *__buf)
748 __THROW __nonnull ((3)) __wur;
749 # endif /* __UCLIBC_SUSV3_LEGACY__ */
751 # if 0 /*def __USE_MISC*/
752 /* Long double versions of above functions. */
753 extern char *qecvt (long double __value, int __ndigit,
754 int *__restrict __decpt, int *__restrict __sign)
755 __THROW __nonnull ((3, 4)) __wur;
756 extern char *qfcvt (long double __value, int __ndigit,
757 int *__restrict __decpt, int *__restrict __sign)
758 __THROW __nonnull ((3, 4)) __wur;
759 extern char *qgcvt (long double __value, int __ndigit, char *__buf)
760 __THROW __nonnull ((3)) __wur;
763 /* Reentrant version of the functions above which provide their own
765 extern int ecvt_r (double __value, int __ndigit, int *__restrict __decpt,
766 int *__restrict __sign, char *__restrict __buf,
767 size_t __len) __THROW __nonnull ((3, 4, 5));
768 extern int fcvt_r (double __value, int __ndigit, int *__restrict __decpt,
769 int *__restrict __sign, char *__restrict __buf,
770 size_t __len) __THROW __nonnull ((3, 4, 5));
772 extern int qecvt_r (long double __value, int __ndigit,
773 int *__restrict __decpt, int *__restrict __sign,
774 char *__restrict __buf, size_t __len)
775 __THROW __nonnull ((3, 4, 5));
776 extern int qfcvt_r (long double __value, int __ndigit,
777 int *__restrict __decpt, int *__restrict __sign,
778 char *__restrict __buf, size_t __len)
779 __THROW __nonnull ((3, 4, 5));
781 #endif /* use MISC || use X/Open Unix */
783 #ifdef __UCLIBC_HAS_WCHAR__
784 __BEGIN_NAMESPACE_STD
785 /* Return the length of the multibyte character
786 in S, which is no longer than N. */
787 extern int mblen (__const char *__s, size_t __n) __THROW __wur;
788 /* Return the length of the given multibyte character,
789 putting its `wchar_t' representation in *PWC. */
790 extern int mbtowc (wchar_t *__restrict __pwc,
791 __const char *__restrict __s, size_t __n) __THROW __wur;
792 /* Put the multibyte character represented
793 by WCHAR in S, returning its length. */
794 extern int wctomb (char *__s, wchar_t __wchar) __THROW __wur;
797 /* Convert a multibyte string to a wide char string. */
798 extern size_t mbstowcs (wchar_t *__restrict __pwcs,
799 __const char *__restrict __s, size_t __n) __THROW;
800 /* Convert a wide char string to multibyte string. */
801 extern size_t wcstombs (char *__restrict __s,
802 __const wchar_t *__restrict __pwcs, size_t __n)
805 #endif /* __UCLIBC_HAS_WCHAR__ */
809 /* Determine whether the string value of RESPONSE matches the affirmation
810 or negative response expression as specified by the LC_MESSAGES category
811 in the program's current locale. Returns 1 if affirmative, 0 if
812 negative, and -1 if not matching. */
813 extern int rpmatch (__const char *__response) __THROW __nonnull ((1)) __wur;
817 #ifdef __USE_XOPEN_EXTENDED
818 /* Parse comma separated suboption from *OPTIONP and match against
819 strings in TOKENS. If found return index and set *VALUEP to
820 optional value introduced by an equal sign. If the suboption is
821 not part of TOKENS return in *VALUEP beginning of unknown
822 suboption. On exit *OPTIONP is set to the beginning of the next
823 token or at the terminating NUL character. */
824 extern int getsubopt (char **__restrict __optionp,
825 char *__const *__restrict __tokens,
826 char **__restrict __valuep)
827 __THROW __nonnull ((1, 2, 3)) __wur;
832 # if defined __UCLIBC_HAS_CRYPT__
833 /* Setup DES tables according KEY. */
834 extern void setkey (__const char *__key) __THROW __nonnull ((1));
835 # endif /* __UCLIBC_HAS_CRYPT__ */
839 /* X/Open pseudo terminal handling. */
842 /* Return a master pseudo-terminal handle. */
843 extern int posix_openpt (int __oflag) __wur;
844 libc_hidden_proto(posix_openpt)
848 /* The next four functions all take a master pseudo-tty fd and
849 perform an operation on the associated slave: */
850 #ifdef __UCLIBC_HAS_PTY__
851 /* Chown the slave to the calling user. */
852 extern int grantpt (int __fd) __THROW;
854 /* Release an internal lock so the slave can be opened.
855 Call after grantpt(). */
856 extern int unlockpt (int __fd) __THROW;
858 /* Return the pathname of the pseudo terminal slave assoicated with
859 the master FD is open on, or NULL on errors.
860 The returned storage is good until the next call to this function. */
861 extern char *ptsname (int __fd) __THROW __wur;
862 #endif /* __UCLIBC_HAS_PTY__ */
866 # if defined __UCLIBC_HAS_PTY__
867 /* Store at most BUFLEN characters of the pathname of the slave pseudo
868 terminal associated with the master FD is open on in BUF.
869 Return 0 on success, otherwise an error number. */
870 extern int ptsname_r (int __fd, char *__buf, size_t __buflen)
871 __THROW __nonnull ((2));
872 libc_hidden_proto(ptsname_r)
874 # if defined __UCLIBC_HAS_GETPT__
875 /* Open a master pseudo terminal and return its file descriptor. */
876 extern int getpt (void);
880 #if 0 /* def __USE_BSD */
881 /* Put the 1 minute, 5 minute and 15 minute load averages into the first
882 NELEM elements of LOADAVG. Return the number written (never more than
883 three, but may be less than NELEM), or -1 if an error occurred. */
884 extern int getloadavg (double __loadavg[], int __nelem)
885 __THROW __nonnull ((1));
888 #ifdef __UCLIBC_HAS_ARC4RANDOM__
890 extern uint32_t arc4random(void);
891 extern void arc4random_stir(void);
892 libc_hidden_proto(arc4random_stir)
893 extern void arc4random_addrandom(unsigned char *, int);
896 #endif /* don't just need malloc and calloc */
897 #undef __need_malloc_and_calloc
901 #endif /* stdlib.h */