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
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. */
134 /* Maximum length of a multibyte character in the current locale. */
135 #define MB_CUR_MAX (__ctype_get_mb_cur_max ())
136 extern size_t __ctype_get_mb_cur_max (void) __THROW;
139 /* Convert a string to a floating-point number. */
140 extern double atof (__const char *__nptr) __THROW __attribute_pure__;
141 /* Convert a string to an integer. */
142 extern int atoi (__const char *__nptr) __THROW __attribute_pure__;
143 /* Convert a string to a long integer. */
144 extern long int atol (__const char *__nptr) __THROW __attribute_pure__;
146 #if defined __USE_ISOC99 || (defined __GNUC__ && defined __USE_MISC)
147 /* Convert a string to a long long integer. */
148 __extension__ extern long long int atoll (__const char *__nptr)
149 __THROW __attribute_pure__;
152 /* Convert a string to a floating-point number. */
153 extern double strtod (__const char *__restrict __nptr,
154 char **__restrict __endptr) __THROW;
157 /* Likewise for `float' and `long double' sizes of floating-point numbers. */
158 extern float strtof (__const char *__restrict __nptr,
159 char **__restrict __endptr) __THROW;
161 extern long double strtold (__const char *__restrict __nptr,
162 char **__restrict __endptr) __THROW;
165 /* Convert a string to a long integer. */
166 extern long int strtol (__const char *__restrict __nptr,
167 char **__restrict __endptr, int __base) __THROW;
168 /* Convert a string to an unsigned long integer. */
169 extern unsigned long int strtoul (__const char *__restrict __nptr,
170 char **__restrict __endptr, int __base)
173 #if defined __GNUC__ && defined __USE_BSD
174 /* Convert a string to a quadword integer. */
176 extern long long int strtoq (__const char *__restrict __nptr,
177 char **__restrict __endptr, int __base) __THROW;
178 /* Convert a string to an unsigned quadword integer. */
180 extern unsigned long long int strtouq (__const char *__restrict __nptr,
181 char **__restrict __endptr, int __base)
183 #endif /* GCC and use BSD. */
185 #if defined __USE_ISOC99 || (defined __GNUC__ && defined __USE_MISC)
186 /* These functions will part of the standard C library in ISO C99. */
188 /* Convert a string to a quadword integer. */
190 extern long long int strtoll (__const char *__restrict __nptr,
191 char **__restrict __endptr, int __base) __THROW;
192 /* Convert a string to an unsigned quadword integer. */
194 extern unsigned long long int strtoull (__const char *__restrict __nptr,
195 char **__restrict __endptr, int __base)
197 #endif /* ISO C99 or GCC and use MISC. */
202 /* The concept of one static locale per category is not very well
203 thought out. Many applications will need to process its data using
204 information from several different locales. Another application is
205 the implementation of the internationalization handling in the
206 upcoming ISO C++ standard library. To support this another set of
207 the functions using locale data exist which have an additional
210 Attention: all these functions are *not* standardized in any form.
211 This is a proof-of-concept implementation. */
213 /* Structure for reentrant locale using functions. This is an
214 (almost) opaque type for the user level programs. */
215 # include <xlocale.h>
217 /* Special versions of the functions above which take the locale to
218 use as an additional parameter. */
219 extern long int __strtol_l (__const char *__restrict __nptr,
220 char **__restrict __endptr, int __base,
221 __locale_t __loc) __THROW;
223 extern unsigned long int __strtoul_l (__const char *__restrict __nptr,
224 char **__restrict __endptr,
225 int __base, __locale_t __loc) __THROW;
228 extern long long int __strtoll_l (__const char *__restrict __nptr,
229 char **__restrict __endptr, int __base,
230 __locale_t __loc) __THROW;
233 extern unsigned long long int __strtoull_l (__const char *__restrict __nptr,
234 char **__restrict __endptr,
235 int __base, __locale_t __loc)
238 extern double __strtod_l (__const char *__restrict __nptr,
239 char **__restrict __endptr, __locale_t __loc)
242 extern float __strtof_l (__const char *__restrict __nptr,
243 char **__restrict __endptr, __locale_t __loc) __THROW;
245 extern long double __strtold_l (__const char *__restrict __nptr,
246 char **__restrict __endptr,
247 __locale_t __loc) __THROW;
251 /* The internal entry points for `strtoX' take an extra flag argument
252 saying whether or not to parse locale-dependent number grouping. */
254 extern double __strtod_internal (__const char *__restrict __nptr,
255 char **__restrict __endptr, int __group)
257 extern float __strtof_internal (__const char *__restrict __nptr,
258 char **__restrict __endptr, int __group)
260 extern long double __strtold_internal (__const char *__restrict __nptr,
261 char **__restrict __endptr,
262 int __group) __THROW;
263 #ifndef __strtol_internal_defined
264 extern long int __strtol_internal (__const char *__restrict __nptr,
265 char **__restrict __endptr,
266 int __base, int __group) __THROW;
267 # define __strtol_internal_defined 1
269 #ifndef __strtoul_internal_defined
270 extern unsigned long int __strtoul_internal (__const char *__restrict __nptr,
271 char **__restrict __endptr,
272 int __base, int __group) __THROW;
273 # define __strtoul_internal_defined 1
275 #if defined __GNUC__ || defined __USE_ISOC99
276 # ifndef __strtoll_internal_defined
278 extern long long int __strtoll_internal (__const char *__restrict __nptr,
279 char **__restrict __endptr,
280 int __base, int __group) __THROW;
281 # define __strtoll_internal_defined 1
283 # ifndef __strtoull_internal_defined
285 extern unsigned long long int __strtoull_internal (__const char *
287 char **__restrict __endptr,
288 int __base, int __group)
290 # define __strtoull_internal_defined 1
294 #ifdef __USE_EXTERN_INLINES
295 /* Define inline functions which call the internal entry points. */
297 extern __inline double
298 strtod (__const char *__restrict __nptr, char **__restrict __endptr) __THROW
300 return __strtod_internal (__nptr, __endptr, 0);
302 extern __inline long int
303 strtol (__const char *__restrict __nptr, char **__restrict __endptr,
306 return __strtol_internal (__nptr, __endptr, __base, 0);
308 extern __inline unsigned long int
309 strtoul (__const char *__restrict __nptr, char **__restrict __endptr,
312 return __strtoul_internal (__nptr, __endptr, __base, 0);
316 extern __inline float
317 strtof (__const char *__restrict __nptr, char **__restrict __endptr) __THROW
319 return __strtof_internal (__nptr, __endptr, 0);
321 extern __inline long double
322 strtold (__const char *__restrict __nptr, char **__restrict __endptr) __THROW
324 return __strtold_internal (__nptr, __endptr, 0);
329 __extension__ extern __inline long long int
330 strtoq (__const char *__restrict __nptr, char **__restrict __endptr,
333 return __strtoll_internal (__nptr, __endptr, __base, 0);
335 __extension__ extern __inline unsigned long long int
336 strtouq (__const char *__restrict __nptr, char **__restrict __endptr,
339 return __strtoull_internal (__nptr, __endptr, __base, 0);
343 # if defined __USE_MISC || defined __USE_ISOC99
344 __extension__ extern __inline long long int
345 strtoll (__const char *__restrict __nptr, char **__restrict __endptr,
348 return __strtoll_internal (__nptr, __endptr, __base, 0);
350 __extension__ extern __inline unsigned long long int
351 strtoull (__const char * __restrict __nptr, char **__restrict __endptr,
354 return __strtoull_internal (__nptr, __endptr, __base, 0);
358 extern __inline double
359 atof (__const char *__nptr) __THROW
361 return strtod (__nptr, (char **) NULL);
364 atoi (__const char *__nptr) __THROW
366 return (int) strtol (__nptr, (char **) NULL, 10);
368 extern __inline long int
369 atol (__const char *__nptr) __THROW
371 return strtol (__nptr, (char **) NULL, 10);
374 # if defined __USE_MISC || defined __USE_ISOC99
375 __extension__ extern __inline long long int
376 atoll (__const char *__nptr) __THROW
378 return strtoll (__nptr, (char **) NULL, 10);
381 #endif /* Optimizing and Inlining. */
384 #if defined __USE_SVID || defined __USE_XOPEN_EXTENDED
385 /* Convert N to base 64 using the digits "./0-9A-Za-z", least-significant
386 digit first. Returns a pointer to static storage overwritten by the
388 extern char *l64a (long int __n) __THROW;
390 /* Read a number from a string S in base 64 as above. */
391 extern long int a64l (__const char *__s) __THROW __attribute_pure__;
394 # include <sys/types.h> /* we need int32_t... */
396 /* These are the functions that actually do things. The `random', `srandom',
397 `initstate' and `setstate' functions are those from BSD Unices.
398 The `rand' and `srand' functions are required by the ANSI standard.
399 We provide both interfaces to the same random number generator. */
400 /* Return a random long integer between 0 and RAND_MAX inclusive. */
401 extern long int random (void) __THROW;
403 /* Seed the random number generator with the given number. */
404 extern void srandom (unsigned int __seed) __THROW;
406 /* Initialize the random number generator to use state buffer STATEBUF,
407 of length STATELEN, and seed it with SEED. Optimal lengths are 8, 16,
408 32, 64, 128 and 256, the bigger the better; values less than 8 will
409 cause an error and values greater than 256 will be rounded down. */
410 extern char *initstate (unsigned int __seed, char *__statebuf,
411 size_t __statelen) __THROW;
413 /* Switch the random number generator to state buffer STATEBUF,
414 which should have been previously initialized by `initstate'. */
415 extern char *setstate (char *__statebuf) __THROW;
419 /* Reentrant versions of the `random' family of functions.
420 These functions all use the following data structure to contain
421 state, rather than global state variables. */
425 int32_t *fptr; /* Front pointer. */
426 int32_t *rptr; /* Rear pointer. */
427 int32_t *state; /* Array of state values. */
428 int rand_type; /* Type of random number generator. */
429 int rand_deg; /* Degree of random number generator. */
430 int rand_sep; /* Distance between front and rear. */
431 int32_t *end_ptr; /* Pointer behind state table. */
434 extern int random_r (struct random_data *__restrict __buf,
435 int32_t *__restrict __result) __THROW;
437 extern int srandom_r (unsigned int __seed, struct random_data *__buf) __THROW;
439 extern int initstate_r (unsigned int __seed, char *__restrict __statebuf,
441 struct random_data *__restrict __buf) __THROW;
443 extern int setstate_r (char *__restrict __statebuf,
444 struct random_data *__restrict __buf) __THROW;
445 # endif /* Use misc. */
446 #endif /* Use SVID || extended X/Open. */
449 /* Return a random integer between 0 and RAND_MAX inclusive. */
450 extern int rand (void) __THROW;
451 /* Seed the random number generator with the given number. */
452 extern void srand (unsigned int __seed) __THROW;
455 /* Reentrant interface according to POSIX.1. */
456 extern int rand_r (unsigned int *__seed) __THROW;
460 #if defined __USE_SVID || defined __USE_XOPEN
461 /* System V style 48-bit random number generator functions. */
463 /* Return non-negative, double-precision floating-point value in [0.0,1.0). */
464 extern double drand48 (void) __THROW;
465 extern double erand48 (unsigned short int __xsubi[3]) __THROW;
467 /* Return non-negative, long integer in [0,2^31). */
468 extern long int lrand48 (void) __THROW;
469 extern long int nrand48 (unsigned short int __xsubi[3]) __THROW;
471 /* Return signed, long integers in [-2^31,2^31). */
472 extern long int mrand48 (void) __THROW;
473 extern long int jrand48 (unsigned short int __xsubi[3]) __THROW;
475 /* Seed random number generator. */
476 extern void srand48 (long int __seedval) __THROW;
477 extern unsigned short int *seed48 (unsigned short int __seed16v[3]) __THROW;
478 extern void lcong48 (unsigned short int __param[7]) __THROW;
481 /* Data structure for communication with thread safe versions. This
482 type is to be regarded as opaque. It's only exported because users
483 have to allocate objects of this type. */
486 unsigned short int __x[3]; /* Current state. */
487 unsigned short int __old_x[3]; /* Old state. */
488 unsigned short int __c; /* Additive const. in congruential formula. */
489 unsigned short int __init; /* Flag for initializing. */
490 unsigned long long int __a; /* Factor in congruential formula. */
493 /* Return non-negative, double-precision floating-point value in [0.0,1.0). */
494 extern int drand48_r (struct drand48_data *__restrict __buffer,
495 double *__restrict __result) __THROW;
496 extern int erand48_r (unsigned short int __xsubi[3],
497 struct drand48_data *__restrict __buffer,
498 double *__restrict __result) __THROW;
500 /* Return non-negative, long integer in [0,2^31). */
501 extern int lrand48_r (struct drand48_data *__restrict __buffer,
502 long int *__restrict __result) __THROW;
503 extern int nrand48_r (unsigned short int __xsubi[3],
504 struct drand48_data *__restrict __buffer,
505 long int *__restrict __result) __THROW;
507 /* Return signed, long integers in [-2^31,2^31). */
508 extern int mrand48_r (struct drand48_data *__restrict __buffer,
509 long int *__restrict __result) __THROW;
510 extern int jrand48_r (unsigned short int __xsubi[3],
511 struct drand48_data *__restrict __buffer,
512 long int *__restrict __result) __THROW;
514 /* Seed random number generator. */
515 extern int srand48_r (long int __seedval, struct drand48_data *__buffer)
518 extern int seed48_r (unsigned short int __seed16v[3],
519 struct drand48_data *__buffer) __THROW;
521 extern int lcong48_r (unsigned short int __param[7],
522 struct drand48_data *__buffer) __THROW;
523 # endif /* Use misc. */
524 #endif /* Use SVID or X/Open. */
526 #endif /* don't just need malloc and calloc */
528 #ifndef __malloc_and_calloc_defined
529 #define __malloc_and_calloc_defined
530 /* Allocate SIZE bytes of memory. */
531 extern void *malloc (size_t __size) __THROW __attribute_malloc__;
532 /* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */
533 extern void *calloc (size_t __nmemb, size_t __size)
534 __THROW __attribute_malloc__;
537 #ifndef __need_malloc_and_calloc
538 /* Re-allocate the previously allocated block
539 in PTR, making the new block SIZE bytes long. */
540 extern void *realloc (void *__ptr, size_t __size) __THROW __attribute_malloc__;
541 /* Free a block allocated by `malloc', `realloc' or `calloc'. */
542 extern void free (void *__ptr) __THROW;
545 /* Free a block. An alias for `free'. (Sun Unices). */
546 extern void cfree (void *__ptr) __THROW;
547 #endif /* Use misc. */
549 #if defined __USE_GNU || defined __USE_BSD || defined __USE_MISC
551 #endif /* Use GNU, BSD, or misc. */
553 #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
554 /* Allocate SIZE bytes on a page boundary. The storage cannot be freed. */
555 extern void *valloc (size_t __size) __THROW __attribute_malloc__;
559 /* Allocate memory of SIZE bytes with an alignment of ALIGNMENT. */
560 extern int posix_memalign (void **__memptr, size_t __alignment, size_t __size)
561 __THROW __attribute_malloc__;
564 /* Abort execution and generate a core-dump. */
565 extern void abort (void) __THROW __attribute__ ((__noreturn__));
568 /* Register a function to be called when `exit' is called. */
569 extern int atexit (void (*__func) (void)) __THROW;
571 /* The following is used by uClibc in atexit.c and sysconf.c */
572 #define __UCLIBC_MAX_ATEXIT 20
576 /* Register a function to be called with the status
577 given to `exit' and the given argument. */
578 extern int on_exit (void (*__func) (int __status, void *__arg), void *__arg)
582 /* Call all functions registered with `atexit' and `on_exit',
583 in the reverse of the order in which they were registered
584 perform stdio cleanup, and terminate program execution with STATUS. */
585 extern void exit (int __status) __THROW __attribute__ ((__noreturn__));
588 /* Terminate the program with STATUS without calling any of the
589 functions registered with `atexit' or `on_exit'. */
590 extern void _Exit (int __status) __THROW __attribute__ ((__noreturn__));
594 /* Return the value of envariable NAME, or NULL if it doesn't exist. */
595 extern char *getenv (__const char *__name) __THROW;
597 /* This function is similar to the above but returns NULL if the
598 programs is running with SUID or SGID enabled. */
599 extern char *__secure_getenv (__const char *__name) __THROW;
601 #if defined __USE_SVID || defined __USE_XOPEN
602 /* The SVID says this is in <stdio.h>, but this seems a better place. */
603 /* Put STRING, which is of the form "NAME=VALUE", in the environment.
604 If there is no `=', remove NAME from the environment. */
605 extern int putenv (char *__string) __THROW;
608 #if defined __USE_BSD || defined __USE_XOPEN2K
609 /* Set NAME to VALUE in the environment.
610 If REPLACE is nonzero, overwrite an existing value. */
611 extern int setenv (__const char *__name, __const char *__value, int __replace)
614 /* Remove the variable NAME from the environment. */
615 extern int unsetenv (__const char *__name) __THROW;
619 /* The `clearenv' was planned to be added to POSIX.1 but probably
620 never made it. Nevertheless the POSIX.9 standard (POSIX bindings
621 for Fortran 77) requires this function. */
622 extern int clearenv (void) __THROW;
626 #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
627 /* Generate a unique temporary file name from TEMPLATE.
628 The last six characters of TEMPLATE must be "XXXXXX";
629 they are replaced with a string that makes the file name unique.
630 Returns TEMPLATE, or a null pointer if it cannot get a unique file name. */
631 extern char *mktemp (char *__template) __THROW;
633 /* Generate a unique temporary file name from TEMPLATE.
634 The last six characters of TEMPLATE must be "XXXXXX";
635 they are replaced with a string that makes the filename unique.
636 Returns a file descriptor open on the file for reading and writing,
637 or -1 if it cannot create a uniquely-named file. */
638 # ifndef __USE_FILE_OFFSET64
639 extern int mkstemp (char *__template) __THROW;
642 extern int __REDIRECT (mkstemp, (char *__template) __THROW, mkstemp64);
644 # define mkstemp mkstemp64
647 # ifdef __USE_LARGEFILE64
648 extern int mkstemp64 (char *__template) __THROW;
653 /* Create a unique temporary directory from TEMPLATE.
654 The last six characters of TEMPLATE must be "XXXXXX";
655 they are replaced with a string that makes the directory name unique.
656 Returns TEMPLATE, or a null pointer if it cannot get a unique name.
657 The directory is created mode 700. */
658 extern char *mkdtemp (char *__template) __THROW;
662 /* Execute the given line as a shell command. */
663 extern int system (__const char *__command) __THROW;
668 /* Return a malloc'd string containing the canonical absolute name of the
669 named file. The last file name component need not exist, and may be a
670 symlink to a nonexistent file. */
671 extern char *canonicalize_file_name (__const char *__name) __THROW;
674 #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
675 /* Return the canonical absolute name of file NAME. The last file name
676 component need not exist, and may be a symlink to a nonexistent file.
677 If RESOLVED is null, the result is malloc'd; otherwise, if the canonical
678 name is PATH_MAX chars or more, returns null with `errno' set to
679 ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars, returns the
681 extern char *realpath (__const char *__restrict __name,
682 char *__restrict __resolved) __THROW;
686 /* Shorthand for type of comparison functions. */
687 #ifndef __COMPAR_FN_T
688 # define __COMPAR_FN_T
689 typedef int (*__compar_fn_t) (__const void *, __const void *);
692 typedef __compar_fn_t comparison_fn_t;
696 /* Do a binary search for KEY in BASE, which consists of NMEMB elements
697 of SIZE bytes each, using COMPAR to perform the comparisons. */
698 extern void *bsearch (__const void *__key, __const void *__base,
699 size_t __nmemb, size_t __size, __compar_fn_t __compar);
701 /* Sort NMEMB elements of BASE, of SIZE bytes each,
702 using COMPAR to perform the comparisons. */
703 extern void qsort (void *__base, size_t __nmemb, size_t __size,
704 __compar_fn_t __compar);
707 /* Return the absolute value of X. */
708 extern int abs (int __x) __THROW __attribute__ ((__const__));
709 extern long int labs (long int __x) __THROW __attribute__ ((__const__));
711 __extension__ extern long long int llabs (long long int __x)
712 __THROW __attribute__ ((__const__));
716 /* Return the `div_t', `ldiv_t' or `lldiv_t' representation
717 of the value of NUMER over DENOM. */
718 /* GCC may have built-ins for these someday. */
719 extern div_t div (int __numer, int __denom)
720 __THROW __attribute__ ((__const__));
721 extern ldiv_t ldiv (long int __numer, long int __denom)
722 __THROW __attribute__ ((__const__));
724 __extension__ extern lldiv_t lldiv (long long int __numer,
725 long long int __denom)
726 __THROW __attribute__ ((__const__));
730 #if defined __USE_SVID || defined __USE_XOPEN_EXTENDED
731 /* Convert floating point numbers to strings. The returned values are
732 valid only until another call to the same function. */
734 /* Convert VALUE to a string with NDIGIT digits and return a pointer to
735 this. Set *DECPT with the position of the decimal character and *SIGN
736 with the sign of the number. */
737 extern char *ecvt (double __value, int __ndigit, int *__restrict __decpt,
738 int *__restrict __sign) __THROW;
740 /* Convert VALUE to a string rounded to NDIGIT decimal digits. Set *DECPT
741 with the position of the decimal character and *SIGN with the sign of
743 extern char *fcvt (double __value, int __ndigit, int *__restrict __decpt,
744 int *__restrict __sign) __THROW;
746 /* If possible convert VALUE to a string with NDIGIT significant digits.
747 Otherwise use exponential representation. The resulting string will
748 be written to BUF. */
749 extern char *gcvt (double __value, int __ndigit, char *__buf) __THROW;
753 /* Long double versions of above functions. */
754 extern char *qecvt (long double __value, int __ndigit,
755 int *__restrict __decpt, int *__restrict __sign) __THROW;
756 extern char *qfcvt (long double __value, int __ndigit,
757 int *__restrict __decpt, int *__restrict __sign) __THROW;
758 extern char *qgcvt (long double __value, int __ndigit, char *__buf) __THROW;
761 /* Reentrant version of the functions above which provide their own
763 extern int ecvt_r (double __value, int __ndigit, int *__restrict __decpt,
764 int *__restrict __sign, char *__restrict __buf,
765 size_t __len) __THROW;
766 extern int fcvt_r (double __value, int __ndigit, int *__restrict __decpt,
767 int *__restrict __sign, char *__restrict __buf,
768 size_t __len) __THROW;
770 extern int qecvt_r (long double __value, int __ndigit,
771 int *__restrict __decpt, int *__restrict __sign,
772 char *__restrict __buf, size_t __len) __THROW;
773 extern int qfcvt_r (long double __value, int __ndigit,
774 int *__restrict __decpt, int *__restrict __sign,
775 char *__restrict __buf, size_t __len) __THROW;
777 #endif /* use MISC || use X/Open Unix */
780 /* Return the length of the multibyte character
781 in S, which is no longer than N. */
782 extern int mblen (__const char *__s, size_t __n) __THROW;
783 /* Return the length of the given multibyte character,
784 putting its `wchar_t' representation in *PWC. */
785 extern int mbtowc (wchar_t *__restrict __pwc,
786 __const char *__restrict __s, size_t __n) __THROW;
787 /* Put the multibyte character represented
788 by WCHAR in S, returning its length. */
789 extern int wctomb (char *__s, wchar_t __wchar) __THROW;
792 /* Convert a multibyte string to a wide char string. */
793 extern size_t mbstowcs (wchar_t *__restrict __pwcs,
794 __const char *__restrict __s, size_t __n) __THROW;
795 /* Convert a wide char string to multibyte string. */
796 extern size_t wcstombs (char *__restrict __s,
797 __const wchar_t *__restrict __pwcs, size_t __n)
802 /* Determine whether the string value of RESPONSE matches the affirmation
803 or negative response expression as specified by the LC_MESSAGES category
804 in the program's current locale. Returns 1 if affirmative, 0 if
805 negative, and -1 if not matching. */
806 extern int rpmatch (__const char *__response) __THROW;
810 #ifdef __USE_XOPEN_EXTENDED
811 /* Parse comma separated suboption from *OPTIONP and match against
812 strings in TOKENS. If found return index and set *VALUEP to
813 optional value introduced by an equal sign. If the suboption is
814 not part of TOKENS return in *VALUEP beginning of unknown
815 suboption. On exit *OPTIONP is set to the beginning of the next
816 token or at the terminating NUL character. */
817 extern int getsubopt (char **__restrict __optionp,
818 char *__const *__restrict __tokens,
819 char **__restrict __valuep) __THROW;
824 /* Setup DES tables according KEY. */
825 extern void setkey (__const char *__key) __THROW;
829 /* X/Open pseudo terminal handling. */
832 /* Return a master pseudo-terminal handle. */
833 extern int posix_openpt (int __oflag) __THROW;
837 /* The next four functions all take a master pseudo-tty fd and
838 perform an operation on the associated slave: */
840 /* Chown the slave to the calling user. */
841 extern int grantpt (int __fd) __THROW;
843 /* Release an internal lock so the slave can be opened.
844 Call after grantpt(). */
845 extern int unlockpt (int __fd) __THROW;
847 /* Return the pathname of the pseudo terminal slave assoicated with
848 the master FD is open on, or NULL on errors.
849 The returned storage is good until the next call to this function. */
850 extern char *ptsname (int __fd) __THROW;
855 /* Store at most BUFLEN characters of the pathname of the slave pseudo
856 terminal associated with the master FD is open on in BUF.
857 Return 0 on success, otherwise an error number. */
858 extern int ptsname_r (int __fd, char *__buf, size_t __buflen) __THROW;
860 /* Open a master pseudo terminal and return its file descriptor. */
861 extern int getpt (void) __THROW;
865 /* Put the 1 minute, 5 minute and 15 minute load averages into the first
866 NELEM elements of LOADAVG. Return the number written (never more than
867 three, but may be less than NELEM), or -1 if an error occurred. */
868 extern int getloadavg (double __loadavg[], int __nelem) __THROW;
871 #endif /* don't just need malloc and calloc */
872 #undef __need_malloc_and_calloc
876 #endif /* stdlib.h */