1 /* Copyright (C) 1991-2007, 2009, 2010 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
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.
8
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.
13
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
17 02111-1307 USA. */
18
19 /*
20 * ISO C99 Standard: 7.20 General utilities <stdlib.h>
21 */
22
23 #ifndef _STDLIB_H
24
25 #include <features.h>
26
27 /* Get size_t, wchar_t and NULL from <stddef.h>. */
28 #define __need_size_t
29 #ifndef __need_malloc_and_calloc
30 # define __need_wchar_t
31 # define __need_NULL
32 #endif
33 #include <stddef.h>
34
35 __BEGIN_DECLS
36
37 #ifndef __need_malloc_and_calloc
38 #define _STDLIB_H 1
39
40 #if (defined __USE_XOPEN || defined __USE_XOPEN2K8) && !defined _SYS_WAIT_H
41 /* XPG requires a few symbols from <sys/wait.h> being defined. */
42 # include <bits/waitflags.h>
43 # include <bits/waitstatus.h>
44
45 # ifdef __USE_BSD
46
47 /* Lots of hair to allow traditional BSD use of `union wait'
48 as well as POSIX.1 use of `int' for the status word. */
49
50 # if defined __GNUC__ && !defined __cplusplus
51 # define __WAIT_INT(status) \
52 (__extension__ (((union { __typeof(status) __in; int __i; }) \
53 { .__in = (status) }).__i))
54 # else
55 # define __WAIT_INT(status) (*(int *) &(status))
56 # endif
57
58 /* This is the type of the argument to `wait'. The funky union
59 causes redeclarations with either `int *' or `union wait *' to be
60 allowed without complaint. __WAIT_STATUS_DEFN is the type used in
61 the actual function definitions. */
62
63 # if !defined __GNUC__ || __GNUC__ < 2 || defined __cplusplus
64 # define __WAIT_STATUS void *
65 # define __WAIT_STATUS_DEFN void *
66 # else
67 /* This works in GCC 2.6.1 and later. */
68 typedef union
69 {
70 union wait *__uptr;
71 int *__iptr;
72 } __WAIT_STATUS __attribute__ ((__transparent_union__));
73 # define __WAIT_STATUS_DEFN int *
74 # endif
75
76 # else /* Don't use BSD. */
77
78 # define __WAIT_INT(status) (status)
79 # define __WAIT_STATUS int *
80 # define __WAIT_STATUS_DEFN int *
81
82 # endif /* Use BSD. */
83
84 /* Define the macros <sys/wait.h> also would define this way. */
85 # define WEXITSTATUS(status) __WEXITSTATUS (__WAIT_INT (status))
86 # define WTERMSIG(status) __WTERMSIG (__WAIT_INT (status))
87 # define WSTOPSIG(status) __WSTOPSIG (__WAIT_INT (status))
88 # define WIFEXITED(status) __WIFEXITED (__WAIT_INT (status))
89 # define WIFSIGNALED(status) __WIFSIGNALED (__WAIT_INT (status))
90 # define WIFSTOPPED(status) __WIFSTOPPED (__WAIT_INT (status))
91 # ifdef __WIFCONTINUED
92 # define WIFCONTINUED(status) __WIFCONTINUED (__WAIT_INT (status))
93 # endif
94 #endif /* X/Open or XPG7 and <sys/wait.h> not included. */
95
96 __BEGIN_NAMESPACE_STD
97 /* Returned by `div'. */
98 typedef struct
99 {
100 int quot; /* Quotient. */
101 int rem; /* Remainder. */
102 } div_t;
103
104 /* Returned by `ldiv'. */
105 #ifndef __ldiv_t_defined
106 typedef struct
107 {
108 long int quot; /* Quotient. */
109 long int rem; /* Remainder. */
110 } ldiv_t;
111 # define __ldiv_t_defined 1
112 #endif
113 __END_NAMESPACE_STD
114
115 #if defined __USE_ISOC99 && !defined __lldiv_t_defined
116 __BEGIN_NAMESPACE_C99
117 /* Returned by `lldiv'. */
118 __extension__ typedef struct
119 {
120 long long int quot; /* Quotient. */
121 long long int rem; /* Remainder. */
122 } lldiv_t;
123 # define __lldiv_t_defined 1
124 __END_NAMESPACE_C99
125 #endif
126
127
128 /* The largest number rand will return (same as INT_MAX). */
129 #define RAND_MAX 2147483647
130
131
132 /* We define these the same for all machines.
133 Changes from this to the outside world should be done in `_exit'. */
134 #define EXIT_FAILURE 1 /* Failing exit status. */
135 #define EXIT_SUCCESS 0 /* Successful exit status. */
136
137
138 /* Maximum length of a multibyte character in the current locale. */
139 #define MB_CUR_MAX (__ctype_get_mb_cur_max ())
140 extern size_t __ctype_get_mb_cur_max (void) __THROW __wur;
141
142
143 __BEGIN_NAMESPACE_STD
144 /* Convert a string to a floating-point number. */
145 extern double atof (__const char *__nptr)
146 __THROW __attribute_pure__ __nonnull ((1)) __wur;
147 /* Convert a string to an integer. */
148 extern int atoi (__const char *__nptr)
149 __THROW __attribute_pure__ __nonnull ((1)) __wur;
150 /* Convert a string to a long integer. */
151 extern long int atol (__const char *__nptr)
152 __THROW __attribute_pure__ __nonnull ((1)) __wur;
153 __END_NAMESPACE_STD
154
155 #if defined __USE_ISOC99 || (defined __GLIBC_HAVE_LONG_LONG && defined __USE_MISC)
156 __BEGIN_NAMESPACE_C99
157 /* Convert a string to a long long integer. */
158 __extension__ extern long long int atoll (__const char *__nptr)
159 __THROW __attribute_pure__ __nonnull ((1)) __wur;
160 __END_NAMESPACE_C99
161 #endif
162
163 __BEGIN_NAMESPACE_STD
164 /* Convert a string to a floating-point number. */
165 extern double strtod (__const char *__restrict __nptr,
166 char **__restrict __endptr)
167 __THROW __nonnull ((1)) __wur;
168 __END_NAMESPACE_STD
169
170 #ifdef __USE_ISOC99
171 __BEGIN_NAMESPACE_C99
172 /* Likewise for `float' and `long double' sizes of floating-point numbers. */
173 extern float strtof (__const char *__restrict __nptr,
174 char **__restrict __endptr) __THROW __nonnull ((1)) __wur;
175
176 extern long double strtold (__const char *__restrict __nptr,
177 char **__restrict __endptr)
178 __THROW __nonnull ((1)) __wur;
179 __END_NAMESPACE_C99
180 #endif
181
182 __BEGIN_NAMESPACE_STD
183 /* Convert a string to a long integer. */
184 extern long int strtol (__const char *__restrict __nptr,
185 char **__restrict __endptr, int __base)
186 __THROW __nonnull ((1)) __wur;
187 /* Convert a string to an unsigned long integer. */
188 extern unsigned long int strtoul (__const char *__restrict __nptr,
189 char **__restrict __endptr, int __base)
190 __THROW __nonnull ((1)) __wur;
191 __END_NAMESPACE_STD
192
193 #if defined __GLIBC_HAVE_LONG_LONG && defined __USE_BSD
194 /* Convert a string to a quadword integer. */
195 __extension__
196 extern long long int strtoq (__const char *__restrict __nptr,
197 char **__restrict __endptr, int __base)
198 __THROW __nonnull ((1)) __wur;
199 /* Convert a string to an unsigned quadword integer. */
200 __extension__
201 extern unsigned long long int strtouq (__const char *__restrict __nptr,
202 char **__restrict __endptr, int __base)
203 __THROW __nonnull ((1)) __wur;
204 #endif /* GCC and use BSD. */
205
206 #if defined __USE_ISOC99 || (defined __GLIBC_HAVE_LONG_LONG && defined __USE_MISC)
207 __BEGIN_NAMESPACE_C99
208 /* Convert a string to a quadword integer. */
209 __extension__
210 extern long long int strtoll (__const char *__restrict __nptr,
211 char **__restrict __endptr, int __base)
212 __THROW __nonnull ((1)) __wur;
213 /* Convert a string to an unsigned quadword integer. */
214 __extension__
215 extern unsigned long long int strtoull (__const char *__restrict __nptr,
216 char **__restrict __endptr, int __base)
217 __THROW __nonnull ((1)) __wur;
218 __END_NAMESPACE_C99
219 #endif /* ISO C99 or GCC and use MISC. */
220
221
222 #ifdef __USE_GNU
223 /* The concept of one static locale per category is not very well
224 thought out. Many applications will need to process its data using
225 information from several different locales. Another problem is
226 the implementation of the internationalization handling in the
227 ISO C++ standard library. To support this another set of
228 the functions using locale data exist which take an additional
229 argument.
230
231 Attention: even though several *_l interfaces are part of POSIX:2008,
232 these are not. */
233
234 /* Structure for reentrant locale using functions. This is an
235 (almost) opaque type for the user level programs. */
236 # include <xlocale.h>
237
238 /* Special versions of the functions above which take the locale to
239 use as an additional parameter. */
240 extern long int strtol_l (__const char *__restrict __nptr,
241 char **__restrict __endptr, int __base,
242 __locale_t __loc) __THROW __nonnull ((1, 4)) __wur;
243
244 extern unsigned long int strtoul_l (__const char *__restrict __nptr,
245 char **__restrict __endptr,
246 int __base, __locale_t __loc)
247 __THROW __nonnull ((1, 4)) __wur;
248
249 __extension__
250 extern long long int strtoll_l (__const char *__restrict __nptr,
251 char **__restrict __endptr, int __base,
252 __locale_t __loc)
253 __THROW __nonnull ((1, 4)) __wur;
254
255 __extension__
256 extern unsigned long long int strtoull_l (__const char *__restrict __nptr,
257 char **__restrict __endptr,
258 int __base, __locale_t __loc)
259 __THROW __nonnull ((1, 4)) __wur;
260
261 extern double strtod_l (__const char *__restrict __nptr,
262 char **__restrict __endptr, __locale_t __loc)
263 __THROW __nonnull ((1, 3)) __wur;
264
265 extern float strtof_l (__const char *__restrict __nptr,
266 char **__restrict __endptr, __locale_t __loc)
267 __THROW __nonnull ((1, 3)) __wur;
268
269 extern long double strtold_l (__const char *__restrict __nptr,
270 char **__restrict __endptr,
271 __locale_t __loc)
272 __THROW __nonnull ((1, 3)) __wur;
273 #endif /* GNU */
274
275
276 #ifdef __USE_EXTERN_INLINES
277 __BEGIN_NAMESPACE_STD
278 __extern_inline double
279 __NTH (atof (__const char *__nptr))
280 {
281 return strtod (__nptr, (char **) NULL);
282 }
283 __extern_inline int
284 __NTH (atoi (__const char *__nptr))
285 {
286 return (int) strtol (__nptr, (char **) NULL, 10);
287 }
288 __extern_inline long int
289 __NTH (atol (__const char *__nptr))
290 {
291 return strtol (__nptr, (char **) NULL, 10);
292 }
293 __END_NAMESPACE_STD
294
295 # if defined __USE_MISC || defined __USE_ISOC99
296 __BEGIN_NAMESPACE_C99
297 __extension__ __extern_inline long long int
298 __NTH (atoll (__const char *__nptr))
299 {
300 return strtoll (__nptr, (char **) NULL, 10);
301 }
302 __END_NAMESPACE_C99
303 # endif
304 #endif /* Optimizing and Inlining. */
305
306
307 #if defined __USE_SVID || defined __USE_XOPEN_EXTENDED
308 /* Convert N to base 64 using the digits "./0-9A-Za-z", least-significant
309 digit first. Returns a pointer to static storage overwritten by the
310 next call. */
311 extern char *l64a (long int __n) __THROW __wur;
312
313 /* Read a number from a string S in base 64 as above. */
314 extern long int a64l (__const char *__s)
315 __THROW __attribute_pure__ __nonnull ((1)) __wur;
316
317 #endif /* Use SVID || extended X/Open. */
318
319 #if defined __USE_SVID || defined __USE_XOPEN_EXTENDED || defined __USE_BSD
320 # include <sys/types.h> /* we need int32_t... */
321
322 /* These are the functions that actually do things. The `random', `srandom',
323 `initstate' and `setstate' functions are those from BSD Unices.
324 The `rand' and `srand' functions are required by the ANSI standard.
325 We provide both interfaces to the same random number generator. */
326 /* Return a random long integer between 0 and RAND_MAX inclusive. */
327 extern long int random (void) __THROW;
328
329 /* Seed the random number generator with the given number. */
330 extern void srandom (unsigned int __seed) __THROW;
331
332 /* Initialize the random number generator to use state buffer STATEBUF,
333 of length STATELEN, and seed it with SEED. Optimal lengths are 8, 16,
334 32, 64, 128 and 256, the bigger the better; values less than 8 will
335 cause an error and values greater than 256 will be rounded down. */
336 extern char *initstate (unsigned int __seed, char *__statebuf,
337 size_t __statelen) __THROW __nonnull ((2));
338
339 /* Switch the random number generator to state buffer STATEBUF,
340 which should have been previously initialized by `initstate'. */
341 extern char *setstate (char *__statebuf) __THROW __nonnull ((1));
342
343
344 # ifdef __USE_MISC
345 /* Reentrant versions of the `random' family of functions.
346 These functions all use the following data structure to contain
347 state, rather than global state variables. */
348
349 struct random_data
350 {
351 int32_t *fptr; /* Front pointer. */
352 int32_t *rptr; /* Rear pointer. */
353 int32_t *state; /* Array of state values. */
354 int rand_type; /* Type of random number generator. */
355 int rand_deg; /* Degree of random number generator. */
356 int rand_sep; /* Distance between front and rear. */
357 int32_t *end_ptr; /* Pointer behind state table. */
358 };
359
360 extern int random_r (struct random_data *__restrict __buf,
361 int32_t *__restrict __result) __THROW __nonnull ((1, 2));
362
363 extern int srandom_r (unsigned int __seed, struct random_data *__buf)
364 __THROW __nonnull ((2));
365
366 extern int initstate_r (unsigned int __seed, char *__restrict __statebuf,
367 size_t __statelen,
368 struct random_data *__restrict __buf)
369 __THROW __nonnull ((2, 4));
370
371 extern int setstate_r (char *__restrict __statebuf,
372 struct random_data *__restrict __buf)
373 __THROW __nonnull ((1, 2));
374 # endif /* Use misc. */
375 #endif /* Use SVID || extended X/Open || BSD. */
376
377
378 __BEGIN_NAMESPACE_STD
379 /* Return a random integer between 0 and RAND_MAX inclusive. */
380 extern int rand (void) __THROW;
381 /* Seed the random number generator with the given number. */
382 extern void srand (unsigned int __seed) __THROW;
383 __END_NAMESPACE_STD
384
385 #ifdef __USE_POSIX
386 /* Reentrant interface according to POSIX.1. */
387 extern int rand_r (unsigned int *__seed) __THROW;
388 #endif
389
390
391 #if defined __USE_SVID || defined __USE_XOPEN
392 /* System V style 48-bit random number generator functions. */
393
394 /* Return non-negative, double-precision floating-point value in [0.0,1.0). */
395 extern double drand48 (void) __THROW;
396 extern double erand48 (unsigned short int __xsubi[3]) __THROW __nonnull ((1));
397
398 /* Return non-negative, long integer in [0,2^31). */
399 extern long int lrand48 (void) __THROW;
400 extern long int nrand48 (unsigned short int __xsubi[3])
401 __THROW __nonnull ((1));
402
403 /* Return signed, long integers in [-2^31,2^31). */
404 extern long int mrand48 (void) __THROW;
405 extern long int jrand48 (unsigned short int __xsubi[3])
406 __THROW __nonnull ((1));
407
408 /* Seed random number generator. */
409 extern void srand48 (long int __seedval) __THROW;
410 extern unsigned short int *seed48 (unsigned short int __seed16v[3])
411 __THROW __nonnull ((1));
412 extern void lcong48 (unsigned short int __param[7]) __THROW __nonnull ((1));
413
414 # ifdef __USE_MISC
415 /* Data structure for communication with thread safe versions. This
416 type is to be regarded as opaque. It's only exported because users
417 have to allocate objects of this type. */
418 struct drand48_data
419 {
420 unsigned short int __x[3]; /* Current state. */
421 unsigned short int __old_x[3]; /* Old state. */
422 unsigned short int __c; /* Additive const. in congruential formula. */
423 unsigned short int __init; /* Flag for initializing. */
424 unsigned long long int __a; /* Factor in congruential formula. */
425 };
426
427 /* Return non-negative, double-precision floating-point value in [0.0,1.0). */
428 extern int drand48_r (struct drand48_data *__restrict __buffer,
429 double *__restrict __result) __THROW __nonnull ((1, 2));
430 extern int erand48_r (unsigned short int __xsubi[3],
431 struct drand48_data *__restrict __buffer,
432 double *__restrict __result) __THROW __nonnull ((1, 2));
433
434 /* Return non-negative, long integer in [0,2^31). */
435 extern int lrand48_r (struct drand48_data *__restrict __buffer,
436 long int *__restrict __result)
437 __THROW __nonnull ((1, 2));
438 extern int nrand48_r (unsigned short int __xsubi[3],
439 struct drand48_data *__restrict __buffer,
440 long int *__restrict __result)
441 __THROW __nonnull ((1, 2));
442
443 /* Return signed, long integers in [-2^31,2^31). */
444 extern int mrand48_r (struct drand48_data *__restrict __buffer,
445 long int *__restrict __result)
446 __THROW __nonnull ((1, 2));
447 extern int jrand48_r (unsigned short int __xsubi[3],
448 struct drand48_data *__restrict __buffer,
449 long int *__restrict __result)
450 __THROW __nonnull ((1, 2));
451
452 /* Seed random number generator. */
453 extern int srand48_r (long int __seedval, struct drand48_data *__buffer)
454 __THROW __nonnull ((2));
455
456 extern int seed48_r (unsigned short int __seed16v[3],
457 struct drand48_data *__buffer) __THROW __nonnull ((1, 2));
458
459 extern int lcong48_r (unsigned short int __param[7],
460 struct drand48_data *__buffer)
461 __THROW __nonnull ((1, 2));
462 # endif /* Use misc. */
463 #endif /* Use SVID or X/Open. */
464
465 #endif /* don't just need malloc and calloc */
466
467 #ifndef __malloc_and_calloc_defined
468 # define __malloc_and_calloc_defined
469 __BEGIN_NAMESPACE_STD
470 /* Allocate SIZE bytes of memory. */
471 extern void *malloc (size_t __size) __THROW __attribute_malloc__ __wur;
472 /* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */
473 extern void *calloc (size_t __nmemb, size_t __size)
474 __THROW __attribute_malloc__ __wur;
475 __END_NAMESPACE_STD
476 #endif
477
478 #ifndef __need_malloc_and_calloc
479 __BEGIN_NAMESPACE_STD
480 /* Re-allocate the previously allocated block
481 in PTR, making the new block SIZE bytes long. */
482 /* __attribute_malloc__ is not used, because if realloc returns
483 the same pointer that was passed to it, aliasing needs to be allowed
484 between objects pointed by the old and new pointers. */
485 extern void *realloc (void *__ptr, size_t __size)
486 __THROW __attribute_warn_unused_result__;
487 /* Free a block allocated by `malloc', `realloc' or `calloc'. */
488 extern void free (void *__ptr) __THROW;
489 __END_NAMESPACE_STD
490
491 #ifdef __USE_MISC
492 /* Free a block. An alias for `free'. (Sun Unices). */
493 extern void cfree (void *__ptr) __THROW;
494 #endif /* Use misc. */
495
496 #if defined __USE_GNU || defined __USE_BSD || defined __USE_MISC
497 # include <alloca.h>
498 #endif /* Use GNU, BSD, or misc. */
499
500 #if (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K) \
501 || defined __USE_BSD
502 /* Allocate SIZE bytes on a page boundary. The storage cannot be freed. */
503 extern void *valloc (size_t __size) __THROW __attribute_malloc__ __wur;
504 #endif
505
506 #ifdef __USE_XOPEN2K
507 /* Allocate memory of SIZE bytes with an alignment of ALIGNMENT. */
508 extern int posix_memalign (void **__memptr, size_t __alignment, size_t __size)
509 __THROW __nonnull ((1)) __wur;
510 #endif
511
512 __BEGIN_NAMESPACE_STD
513 /* Abort execution and generate a core-dump. */
514 extern void abort (void) __THROW __attribute__ ((__noreturn__));
515
516
517 /* Register a function to be called when `exit' is called. */
518 extern int atexit (void (*__func) (void)) __THROW __nonnull ((1));
519
520 #ifdef __USE_GNU
521 // XXX There should be a macro to signal with C++ revision is used.
522 // XXX This function is in the C++1x revision.
523 /* Register a function to be called when `quick_exit' is called. */
524 # ifdef __cplusplus
525 extern "C++" int at_quick_exit (void (*__func) (void))
526 __THROW __asm ("at_quick_exit") __nonnull ((1));
527 # else
528 extern int at_quick_exit (void (*__func) (void)) __THROW __nonnull ((1));
529 # endif
530 #endif
531 __END_NAMESPACE_STD
532
533 #ifdef __USE_MISC
534 /* Register a function to be called with the status
535 given to `exit' and the given argument. */
536 extern int on_exit (void (*__func) (int __status, void *__arg), void *__arg)
537 __THROW __nonnull ((1));
538 #endif
539
540 __BEGIN_NAMESPACE_STD
541 /* Call all functions registered with `atexit' and `on_exit',
542 in the reverse of the order in which they were registered,
543 perform stdio cleanup, and terminate program execution with STATUS. */
544 extern void exit (int __status) __THROW __attribute__ ((__noreturn__));
545
546 #ifdef __USE_GNU
547 // XXX There should be a macro to signal with C++ revision is used.
548 // XXX This function is in the C++1x revision.
549 /* Call all functions registered with `at_quick_exit' in the reverse
550 of the order in which they were registered and terminate program
551 execution with STATUS. */
552 extern void quick_exit (int __status) __THROW __attribute__ ((__noreturn__));
553 #endif
554 __END_NAMESPACE_STD
555
556 #ifdef __USE_ISOC99
557 __BEGIN_NAMESPACE_C99
558 /* Terminate the program with STATUS without calling any of the
559 functions registered with `atexit' or `on_exit'. */
560 extern void _Exit (int __status) __THROW __attribute__ ((__noreturn__));
561 __END_NAMESPACE_C99
562 #endif
563
564
565 __BEGIN_NAMESPACE_STD
566 /* Return the value of envariable NAME, or NULL if it doesn't exist. */
567 extern char *getenv (__const char *__name) __THROW __nonnull ((1)) __wur;
568 __END_NAMESPACE_STD
569
570 /* This function is similar to the above but returns NULL if the
571 programs is running with SUID or SGID enabled. */
572 extern char *__secure_getenv (__const char *__name)
573 __THROW __nonnull ((1)) __wur;
574
575 #if defined __USE_SVID || defined __USE_XOPEN
576 /* The SVID says this is in <stdio.h>, but this seems a better place. */
577 /* Put STRING, which is of the form "NAME=VALUE", in the environment.
578 If there is no `=', remove NAME from the environment. */
579 extern int putenv (char *__string) __THROW __nonnull ((1));
580 #endif
581
582 #if defined __USE_BSD || defined __USE_XOPEN2K
583 /* Set NAME to VALUE in the environment.
584 If REPLACE is nonzero, overwrite an existing value. */
585 extern int setenv (__const char *__name, __const char *__value, int __replace)
586 __THROW __nonnull ((2));
587
588 /* Remove the variable NAME from the environment. */
589 extern int unsetenv (__const char *__name) __THROW __nonnull ((1));
590 #endif
591
592 #ifdef __USE_MISC
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;
597 #endif
598
599
600 #if defined __USE_MISC \
601 || (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K)
602 /* Generate a unique temporary file name from TEMPLATE.
603 The last six characters of TEMPLATE must be "XXXXXX";
604 they are replaced with a string that makes the file name unique.
605 Returns TEMPLATE, or a null pointer if it cannot get a unique file name. */
606 extern char *mktemp (char *__template) __THROW __nonnull ((1)) __wur;
607 #endif
608
609 #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED \
610 || defined __USE_XOPEN2K8
611 /* Generate a unique temporary file name from TEMPLATE.
612 The last six characters of TEMPLATE must be "XXXXXX";
613 they are replaced with a string that makes the filename unique.
614 Returns a file descriptor open on the file for reading and writing,
615 or -1 if it cannot create a uniquely-named file.
616
617 This function is a possible cancellation point and therefore not
618 marked with __THROW. */
619 # ifndef __USE_FILE_OFFSET64
620 extern int mkstemp (char *__template) __nonnull ((1)) __wur;
621 # else
622 # ifdef __REDIRECT
623 extern int __REDIRECT (mkstemp, (char *__template), mkstemp64)
624 __nonnull ((1)) __wur;
625 # else
626 # define mkstemp mkstemp64
627 # endif
628 # endif
629 # ifdef __USE_LARGEFILE64
630 extern int mkstemp64 (char *__template) __nonnull ((1)) __wur;
631 # endif
632 #endif
633
634 #ifdef __USE_MISC
635 /* Similar to mkstemp, but the template can have a suffix after the
636 XXXXXX. The length of the suffix is specified in the second
637 parameter.
638
639 This function is a possible cancellation point and therefore not
640 marked with __THROW. */
641 # ifndef __USE_FILE_OFFSET64
642 extern int mkstemps (char *__template, int __suffixlen) __nonnull ((1)) __wur;
643 # else
644 # ifdef __REDIRECT
645 extern int __REDIRECT (mkstemps, (char *__template, int __suffixlen),
646 mkstemps64) __nonnull ((1)) __wur;
647 # else
648 # define mkstemps mkstemps64
649 # endif
650 # endif
651 # ifdef __USE_LARGEFILE64
652 extern int mkstemps64 (char *__template, int __suffixlen)
653 __nonnull ((1)) __wur;
654 # endif
655 #endif
656
657 #if defined __USE_BSD || defined __USE_XOPEN2K8
658 /* Create a unique temporary directory from TEMPLATE.
659 The last six characters of TEMPLATE must be "XXXXXX";
660 they are replaced with a string that makes the directory name unique.
661 Returns TEMPLATE, or a null pointer if it cannot get a unique name.
662 The directory is created mode 700. */
663 extern char *mkdtemp (char *__template) __THROW __nonnull ((1)) __wur;
664 #endif
665
666 #ifdef __USE_GNU
667 /* Generate a unique temporary file name from TEMPLATE similar to
668 mkstemp. But allow the caller to pass additional flags which are
669 used in the open call to create the file..
670
671 This function is a possible cancellation points and therefore not
672 marked with __THROW. */
673 # ifndef __USE_FILE_OFFSET64
674 extern int mkostemp (char *__template, int __flags) __nonnull ((1)) __wur;
675 # else
676 # ifdef __REDIRECT
677 extern int __REDIRECT (mkostemp, (char *__template, int __flags), mkostemp64)
678 __nonnull ((1)) __wur;
679 # else
680 # define mkostemp mkostemp64
681 # endif
682 # endif
683 # ifdef __USE_LARGEFILE64
684 extern int mkostemp64 (char *__template, int __flags) __nonnull ((1)) __wur;
685 # endif
686
687 /* Similar to mkostemp, but the template can have a suffix after the
688 XXXXXX. The length of the suffix is specified in the second
689 parameter.
690
691 This function is a possible cancellation point and therefore not
692 marked with __THROW. */
693 # ifndef __USE_FILE_OFFSET64
694 extern int mkostemps (char *__template, int __suffixlen, int __flags)
695 __nonnull ((1)) __wur;
696 # else
697 # ifdef __REDIRECT
698 extern int __REDIRECT (mkostemps, (char *__template, int __suffixlen,
699 int __flags), mkostemps64)
700 __nonnull ((1)) __wur;
701 # else
702 # define mkostemps mkostemps64
703 # endif
704 # endif
705 # ifdef __USE_LARGEFILE64
706 extern int mkostemps64 (char *__template, int __suffixlen, int __flags)
707 __nonnull ((1)) __wur;
708 # endif
709 #endif
710
711
712 __BEGIN_NAMESPACE_STD
713 /* Execute the given line as a shell command.
714
715 This function is a cancellation point and therefore not marked with
716 __THROW. */
717 extern int system (__const char *__command) __wur;
718 __END_NAMESPACE_STD
719
720
721 #ifdef __USE_GNU
722 /* Return a malloc'd string containing the canonical absolute name of the
723 existing named file. */
724 extern char *canonicalize_file_name (__const char *__name)
725 __THROW __nonnull ((1)) __wur;
726 #endif
727
728 #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
729 /* Return the canonical absolute name of file NAME. If RESOLVED is
730 null, the result is malloc'd; otherwise, if the canonical name is
731 PATH_MAX chars or more, returns null with `errno' set to
732 ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars,
733 returns the name in RESOLVED. */
734 extern char *realpath (__const char *__restrict __name,
735 char *__restrict __resolved) __THROW __wur;
736 #endif
737
738
739 /* Shorthand for type of comparison functions. */
740 #ifndef __COMPAR_FN_T
741 # define __COMPAR_FN_T
742 typedef int (*__compar_fn_t) (__const void *, __const void *);
743
744 # ifdef __USE_GNU
745 typedef __compar_fn_t comparison_fn_t;
746 # endif
747 #endif
748 #ifdef __USE_GNU
749 typedef int (*__compar_d_fn_t) (__const void *, __const void *, void *);
750 #endif
751
752 __BEGIN_NAMESPACE_STD
753 /* Do a binary search for KEY in BASE, which consists of NMEMB elements
754 of SIZE bytes each, using COMPAR to perform the comparisons. */
755 extern void *bsearch (__const void *__key, __const void *__base,
756 size_t __nmemb, size_t __size, __compar_fn_t __compar)
757 __nonnull ((1, 2, 5)) __wur;
758
759 /* Sort NMEMB elements of BASE, of SIZE bytes each,
760 using COMPAR to perform the comparisons. */
761 extern void qsort (void *__base, size_t __nmemb, size_t __size,
762 __compar_fn_t __compar) __nonnull ((1, 4));
763 #ifdef __USE_GNU
764 extern void qsort_r (void *__base, size_t __nmemb, size_t __size,
765 __compar_d_fn_t __compar, void *__arg)
766 __nonnull ((1, 4));
767 #endif
768
769
770 /* Return the absolute value of X. */
771 extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur;
772 extern long int labs (long int __x) __THROW __attribute__ ((__const__)) __wur;
773 __END_NAMESPACE_STD
774
775 #ifdef __USE_ISOC99
776 __extension__ extern long long int llabs (long long int __x)
777 __THROW __attribute__ ((__const__)) __wur;
778 #endif
779
780
781 __BEGIN_NAMESPACE_STD
782 /* Return the `div_t', `ldiv_t' or `lldiv_t' representation
783 of the value of NUMER over DENOM. */
784 /* GCC may have built-ins for these someday. */
785 extern div_t div (int __numer, int __denom)
786 __THROW __attribute__ ((__const__)) __wur;
787 extern ldiv_t ldiv (long int __numer, long int __denom)
788 __THROW __attribute__ ((__const__)) __wur;
789 __END_NAMESPACE_STD
790
791 #ifdef __USE_ISOC99
792 __BEGIN_NAMESPACE_C99
793 __extension__ extern lldiv_t lldiv (long long int __numer,
794 long long int __denom)
795 __THROW __attribute__ ((__const__)) __wur;
796 __END_NAMESPACE_C99
797 #endif
798
799
800 #if (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K) \
801 || defined __USE_SVID
802 /* Convert floating point numbers to strings. The returned values are
803 valid only until another call to the same function. */
804
805 /* Convert VALUE to a string with NDIGIT digits and return a pointer to
806 this. Set *DECPT with the position of the decimal character and *SIGN
807 with the sign of the number. */
808 extern char *ecvt (double __value, int __ndigit, int *__restrict __decpt,
809 int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur;
810
811 /* Convert VALUE to a string rounded to NDIGIT decimal digits. Set *DECPT
812 with the position of the decimal character and *SIGN with the sign of
813 the number. */
814 extern char *fcvt (double __value, int __ndigit, int *__restrict __decpt,
815 int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur;
816
817 /* If possible convert VALUE to a string with NDIGIT significant digits.
818 Otherwise use exponential representation. The resulting string will
819 be written to BUF. */
820 extern char *gcvt (double __value, int __ndigit, char *__buf)
821 __THROW __nonnull ((3)) __wur;
822
823
824 # ifdef __USE_MISC
825 /* Long double versions of above functions. */
826 extern char *qecvt (long double __value, int __ndigit,
827 int *__restrict __decpt, int *__restrict __sign)
828 __THROW __nonnull ((3, 4)) __wur;
829 extern char *qfcvt (long double __value, int __ndigit,
830 int *__restrict __decpt, int *__restrict __sign)
831 __THROW __nonnull ((3, 4)) __wur;
832 extern char *qgcvt (long double __value, int __ndigit, char *__buf)
833 __THROW __nonnull ((3)) __wur;
834
835
836 /* Reentrant version of the functions above which provide their own
837 buffers. */
838 extern int ecvt_r (double __value, int __ndigit, int *__restrict __decpt,
839 int *__restrict __sign, char *__restrict __buf,
840 size_t __len) __THROW __nonnull ((3, 4, 5));
841 extern int fcvt_r (double __value, int __ndigit, int *__restrict __decpt,
842 int *__restrict __sign, char *__restrict __buf,
843 size_t __len) __THROW __nonnull ((3, 4, 5));
844
845 extern int qecvt_r (long double __value, int __ndigit,
846 int *__restrict __decpt, int *__restrict __sign,
847 char *__restrict __buf, size_t __len)
848 __THROW __nonnull ((3, 4, 5));
849 extern int qfcvt_r (long double __value, int __ndigit,
850 int *__restrict __decpt, int *__restrict __sign,
851 char *__restrict __buf, size_t __len)
852 __THROW __nonnull ((3, 4, 5));
853 # endif /* misc */
854 #endif /* use MISC || use X/Open Unix */
855
856
857 __BEGIN_NAMESPACE_STD
858 /* Return the length of the multibyte character
859 in S, which is no longer than N. */
860 extern int mblen (__const char *__s, size_t __n) __THROW __wur;
861 /* Return the length of the given multibyte character,
862 putting its `wchar_t' representation in *PWC. */
863 extern int mbtowc (wchar_t *__restrict __pwc,
864 __const char *__restrict __s, size_t __n) __THROW __wur;
865 /* Put the multibyte character represented
866 by WCHAR in S, returning its length. */
867 extern int wctomb (char *__s, wchar_t __wchar) __THROW __wur;
868
869
870 /* Convert a multibyte string to a wide char string. */
871 extern size_t mbstowcs (wchar_t *__restrict __pwcs,
872 __const char *__restrict __s, size_t __n) __THROW;
873 /* Convert a wide char string to multibyte string. */
874 extern size_t wcstombs (char *__restrict __s,
875 __const wchar_t *__restrict __pwcs, size_t __n)
876 __THROW;
877 __END_NAMESPACE_STD
878
879
880 #ifdef __USE_SVID
881 /* Determine whether the string value of RESPONSE matches the affirmation
882 or negative response expression as specified by the LC_MESSAGES category
883 in the program's current locale. Returns 1 if affirmative, 0 if
884 negative, and -1 if not matching. */
885 extern int rpmatch (__const char *__response) __THROW __nonnull ((1)) __wur;
886 #endif
887
888
889 #if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
890 /* Parse comma separated suboption from *OPTIONP and match against
891 strings in TOKENS. If found return index and set *VALUEP to
892 optional value introduced by an equal sign. If the suboption is
893 not part of TOKENS return in *VALUEP beginning of unknown
894 suboption. On exit *OPTIONP is set to the beginning of the next
895 token or at the terminating NUL character. */
896 extern int getsubopt (char **__restrict __optionp,
897 char *__const *__restrict __tokens,
898 char **__restrict __valuep)
899 __THROW __nonnull ((1, 2, 3)) __wur;
900 #endif
901
902
903 #ifdef __USE_XOPEN
904 /* Setup DES tables according KEY. */
905 extern void setkey (__const char *__key) __THROW __nonnull ((1));
906 #endif
907
908
909 /* X/Open pseudo terminal handling. */
910
911 #ifdef __USE_XOPEN2KXSI
912 /* Return a master pseudo-terminal handle. */
913 extern int posix_openpt (int __oflag) __wur;
914 #endif
915
916 #ifdef __USE_XOPEN
917 /* The next four functions all take a master pseudo-tty fd and
918 perform an operation on the associated slave: */
919
920 /* Chown the slave to the calling user. */
921 extern int grantpt (int __fd) __THROW;
922
923 /* Release an internal lock so the slave can be opened.
924 Call after grantpt(). */
925 extern int unlockpt (int __fd) __THROW;
926
927 /* Return the pathname of the pseudo terminal slave assoicated with
928 the master FD is open on, or NULL on errors.
929 The returned storage is good until the next call to this function. */
930 extern char *ptsname (int __fd) __THROW __wur;
931 #endif
932
933 #ifdef __USE_GNU
934 /* Store at most BUFLEN characters of the pathname of the slave pseudo
935 terminal associated with the master FD is open on in BUF.
936 Return 0 on success, otherwise an error number. */
937 extern int ptsname_r (int __fd, char *__buf, size_t __buflen)
938 __THROW __nonnull ((2));
939
940 /* Open a master pseudo terminal and return its file descriptor. */
941 extern int getpt (void);
942 #endif
943
944 #ifdef __USE_BSD
945 /* Put the 1 minute, 5 minute and 15 minute load averages into the first
946 NELEM elements of LOADAVG. Return the number written (never more than
947 three, but may be less than NELEM), or -1 if an error occurred. */
948 extern int getloadavg (double __loadavg[], int __nelem)
949 __THROW __nonnull ((1));
950 #endif
951
952
953 /* Define some macros helping to catch buffer overflows. */
954 #if __USE_FORTIFY_LEVEL > 0 && defined __extern_always_inline
955 # include <bits/stdlib.h>
956 #endif
957 #ifdef __LDBL_COMPAT
958 # include <bits/stdlib-ldbl.h>
959 #endif
960
961 #endif /* don't just need malloc and calloc */
962 #undef __need_malloc_and_calloc
963
964 __END_DECLS
965
966 #endif /* stdlib.h */
967