stdlib.h 31 KB

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  1. /* Copyright (C) 1991-2003, 2004, 2005 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. The GNU C Library is free software; you can redistribute it and/or
  4. modify it under the terms of the GNU Lesser General Public
  5. License as published by the Free Software Foundation; either
  6. version 2.1 of the License, or (at your option) any later version.
  7. The GNU C Library is distributed in the hope that it will be useful,
  8. but WITHOUT ANY WARRANTY; without even the implied warranty of
  9. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  10. Lesser General Public License for more details.
  11. You should have received a copy of the GNU Lesser General Public
  12. License along with the GNU C Library; if not, write to the Free
  13. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  14. 02111-1307 USA. */
  15. /*
  16. * ISO C99 Standard: 7.20 General utilities <stdlib.h>
  17. */
  18. #ifndef _STDLIB_H
  19. #include <features.h>
  20. /* Get size_t, wchar_t and NULL from <stddef.h>. */
  21. #define __need_size_t
  22. #ifndef __need_malloc_and_calloc
  23. # ifdef __UCLIBC_HAS_WCHAR__
  24. # define __need_wchar_t
  25. # endif
  26. # define __need_NULL
  27. #endif
  28. #include <stddef.h>
  29. __BEGIN_DECLS
  30. #ifndef __need_malloc_and_calloc
  31. #define _STDLIB_H 1
  32. #if defined __USE_XOPEN && !defined _SYS_WAIT_H
  33. /* XPG requires a few symbols from <sys/wait.h> being defined. */
  34. # include <bits/waitflags.h>
  35. # include <bits/waitstatus.h>
  36. # ifdef __USE_BSD
  37. /* Lots of hair to allow traditional BSD use of `union wait'
  38. as well as POSIX.1 use of `int' for the status word. */
  39. # if defined __GNUC__ && !defined __cplusplus
  40. # define __WAIT_INT(status) \
  41. (__extension__ ({ union { __typeof(status) __in; int __i; } __u; \
  42. __u.__in = (status); __u.__i; }))
  43. # else
  44. # define __WAIT_INT(status) (*(int *) &(status))
  45. # endif
  46. /* This is the type of the argument to `wait'. The funky union
  47. causes redeclarations with ether `int *' or `union wait *' to be
  48. allowed without complaint. __WAIT_STATUS_DEFN is the type used in
  49. the actual function definitions. */
  50. # if !defined __GNUC__ || __GNUC__ < 2 || defined __cplusplus
  51. # define __WAIT_STATUS void *
  52. # define __WAIT_STATUS_DEFN void *
  53. # else
  54. /* This works in GCC 2.6.1 and later. */
  55. typedef union
  56. {
  57. union wait *__uptr;
  58. int *__iptr;
  59. } __WAIT_STATUS __attribute__ ((__transparent_union__));
  60. # define __WAIT_STATUS_DEFN int *
  61. # endif
  62. # else /* Don't use BSD. */
  63. # define __WAIT_INT(status) (status)
  64. # define __WAIT_STATUS int *
  65. # define __WAIT_STATUS_DEFN int *
  66. # endif /* Use BSD. */
  67. /* Define the macros <sys/wait.h> also would define this way. */
  68. # define WEXITSTATUS(status) __WEXITSTATUS(__WAIT_INT(status))
  69. # define WTERMSIG(status) __WTERMSIG(__WAIT_INT(status))
  70. # define WSTOPSIG(status) __WSTOPSIG(__WAIT_INT(status))
  71. # define WIFEXITED(status) __WIFEXITED(__WAIT_INT(status))
  72. # define WIFSIGNALED(status) __WIFSIGNALED(__WAIT_INT(status))
  73. # define WIFSTOPPED(status) __WIFSTOPPED(__WAIT_INT(status))
  74. # if 0 /* def __WIFCONTINUED */
  75. # define WIFCONTINUED(status) __WIFCONTINUED(__WAIT_INT(status))
  76. # endif
  77. #endif /* X/Open and <sys/wait.h> not included. */
  78. __BEGIN_NAMESPACE_STD
  79. /* Returned by `div'. */
  80. typedef struct
  81. {
  82. int quot; /* Quotient. */
  83. int rem; /* Remainder. */
  84. } div_t;
  85. /* Returned by `ldiv'. */
  86. #ifndef __ldiv_t_defined
  87. typedef struct
  88. {
  89. long int quot; /* Quotient. */
  90. long int rem; /* Remainder. */
  91. } ldiv_t;
  92. # define __ldiv_t_defined 1
  93. #endif
  94. __END_NAMESPACE_STD
  95. #if defined __USE_ISOC99 && !defined __lldiv_t_defined
  96. __BEGIN_NAMESPACE_C99
  97. /* Returned by `lldiv'. */
  98. __extension__ typedef struct
  99. {
  100. long long int quot; /* Quotient. */
  101. long long int rem; /* Remainder. */
  102. } lldiv_t;
  103. # define __lldiv_t_defined 1
  104. __END_NAMESPACE_C99
  105. #endif
  106. /* The largest number rand will return (same as INT_MAX). */
  107. #define RAND_MAX 2147483647
  108. /* We define these the same for all machines.
  109. Changes from this to the outside world should be done in `_exit'. */
  110. #define EXIT_FAILURE 1 /* Failing exit status. */
  111. #define EXIT_SUCCESS 0 /* Successful exit status. */
  112. /* Maximum length of a multibyte character in the current locale. */
  113. #if 0
  114. #define MB_CUR_MAX (__ctype_get_mb_cur_max ())
  115. extern size_t __ctype_get_mb_cur_max (void) __THROW __wur;
  116. #endif
  117. #ifdef __UCLIBC_HAS_WCHAR__
  118. #define MB_CUR_MAX (_stdlib_mb_cur_max ())
  119. extern size_t _stdlib_mb_cur_max (void) __THROW __wur;
  120. libc_hidden_proto(_stdlib_mb_cur_max)
  121. #endif
  122. __BEGIN_NAMESPACE_STD
  123. #ifdef __UCLIBC_HAS_FLOATS__
  124. /* Convert a string to a floating-point number. */
  125. extern double atof (__const char *__nptr)
  126. __THROW __attribute_pure__ __nonnull ((1)) __wur;
  127. #endif /* __UCLIBC_HAS_FLOATS__ */
  128. /* Convert a string to an integer. */
  129. extern int atoi (__const char *__nptr)
  130. __THROW __attribute_pure__ __nonnull ((1)) __wur;
  131. libc_hidden_proto(atoi)
  132. /* Convert a string to a long integer. */
  133. extern long int atol (__const char *__nptr)
  134. __THROW __attribute_pure__ __nonnull ((1)) __wur;
  135. libc_hidden_proto(atol)
  136. __END_NAMESPACE_STD
  137. #if defined __USE_ISOC99 || defined __USE_MISC
  138. __BEGIN_NAMESPACE_C99
  139. /* Convert a string to a long long integer. */
  140. __extension__ extern long long int atoll (__const char *__nptr)
  141. __THROW __attribute_pure__ __nonnull ((1)) __wur;
  142. __END_NAMESPACE_C99
  143. #endif
  144. #ifdef __UCLIBC_HAS_FLOATS__
  145. __BEGIN_NAMESPACE_STD
  146. /* Convert a string to a floating-point number. */
  147. extern double strtod (__const char *__restrict __nptr,
  148. char **__restrict __endptr)
  149. __THROW __nonnull ((1)) __wur;
  150. libc_hidden_proto(strtod)
  151. __END_NAMESPACE_STD
  152. #ifdef __USE_ISOC99
  153. __BEGIN_NAMESPACE_C99
  154. /* Likewise for `float' and `long double' sizes of floating-point numbers. */
  155. extern float strtof (__const char *__restrict __nptr,
  156. char **__restrict __endptr) __THROW __nonnull ((1)) __wur;
  157. extern long double strtold (__const char *__restrict __nptr,
  158. char **__restrict __endptr)
  159. __THROW __nonnull ((1)) __wur;
  160. __END_NAMESPACE_C99
  161. #endif
  162. #endif /* __UCLIBC_HAS_FLOATS__ */
  163. __BEGIN_NAMESPACE_STD
  164. /* Convert a string to a long integer. */
  165. extern long int strtol (__const char *__restrict __nptr,
  166. char **__restrict __endptr, int __base)
  167. __THROW __nonnull ((1)) __wur;
  168. libc_hidden_proto(strtol)
  169. /* Convert a string to an unsigned long integer. */
  170. extern unsigned long int strtoul (__const char *__restrict __nptr,
  171. char **__restrict __endptr, int __base)
  172. __THROW __nonnull ((1)) __wur;
  173. libc_hidden_proto(strtoul)
  174. __END_NAMESPACE_STD
  175. #ifdef __USE_BSD
  176. /* Convert a string to a quadword integer. */
  177. __extension__
  178. extern long long int strtoq (__const char *__restrict __nptr,
  179. char **__restrict __endptr, int __base)
  180. __THROW __nonnull ((1)) __wur;
  181. /* Convert a string to an unsigned quadword integer. */
  182. __extension__
  183. extern unsigned long long int strtouq (__const char *__restrict __nptr,
  184. char **__restrict __endptr, int __base)
  185. __THROW __nonnull ((1)) __wur;
  186. #endif /* GCC and use BSD. */
  187. #if defined __USE_ISOC99 || defined __USE_MISC
  188. __BEGIN_NAMESPACE_C99
  189. /* Convert a string to a quadword integer. */
  190. __extension__
  191. extern long long int strtoll (__const char *__restrict __nptr,
  192. char **__restrict __endptr, int __base)
  193. __THROW __nonnull ((1)) __wur;
  194. libc_hidden_proto(strtoll)
  195. /* Convert a string to an unsigned quadword integer. */
  196. __extension__
  197. extern unsigned long long int strtoull (__const char *__restrict __nptr,
  198. char **__restrict __endptr, int __base)
  199. __THROW __nonnull ((1)) __wur;
  200. __END_NAMESPACE_C99
  201. #endif /* ISO C99 or GCC and use MISC. */
  202. #ifdef __UCLIBC_HAS_XLOCALE__
  203. #ifdef __USE_GNU
  204. /* The concept of one static locale per category is not very well
  205. thought out. Many applications will need to process its data using
  206. information from several different locales. Another application is
  207. the implementation of the internationalization handling in the
  208. upcoming ISO C++ standard library. To support this another set of
  209. the functions using locale data exist which have an additional
  210. argument.
  211. Attention: all these functions are *not* standardized in any form.
  212. 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>
  216. /* Special versions of the functions above which take the locale to
  217. use as an additional parameter. */
  218. extern long int strtol_l (__const char *__restrict __nptr,
  219. char **__restrict __endptr, int __base,
  220. __locale_t __loc) __THROW __nonnull ((1, 4)) __wur;
  221. libc_hidden_proto(strtol_l)
  222. extern unsigned long int strtoul_l (__const char *__restrict __nptr,
  223. char **__restrict __endptr,
  224. int __base, __locale_t __loc)
  225. __THROW __nonnull ((1, 4)) __wur;
  226. libc_hidden_proto(strtoul_l)
  227. __extension__
  228. extern long long int strtoll_l (__const char *__restrict __nptr,
  229. char **__restrict __endptr, int __base,
  230. __locale_t __loc)
  231. __THROW __nonnull ((1, 4)) __wur;
  232. __extension__
  233. extern unsigned long long int strtoull_l (__const char *__restrict __nptr,
  234. char **__restrict __endptr,
  235. int __base, __locale_t __loc)
  236. __THROW __nonnull ((1, 4)) __wur;
  237. #ifdef __UCLIBC_HAS_FLOATS__
  238. extern double strtod_l (__const char *__restrict __nptr,
  239. char **__restrict __endptr, __locale_t __loc)
  240. __THROW __nonnull ((1, 3)) __wur;
  241. extern float strtof_l (__const char *__restrict __nptr,
  242. char **__restrict __endptr, __locale_t __loc)
  243. __THROW __nonnull ((1, 3)) __wur;
  244. extern long double strtold_l (__const char *__restrict __nptr,
  245. char **__restrict __endptr,
  246. __locale_t __loc)
  247. __THROW __nonnull ((1, 3)) __wur;
  248. #endif /* __UCLIBC_HAS_FLOATS__ */
  249. #endif /* GNU */
  250. #endif /* __UCLIBC_HAS_XLOCALE__ */
  251. #if defined __USE_SVID || defined __USE_XOPEN_EXTENDED
  252. /* Convert N to base 64 using the digits "./0-9A-Za-z", least-significant
  253. digit first. Returns a pointer to static storage overwritten by the
  254. next call. */
  255. extern char *l64a (long int __n) __THROW __wur;
  256. /* Read a number from a string S in base 64 as above. */
  257. extern long int a64l (__const char *__s)
  258. __THROW __attribute_pure__ __nonnull ((1)) __wur;
  259. #endif /* Use SVID || extended X/Open. */
  260. #if defined __USE_SVID || defined __USE_XOPEN_EXTENDED || defined __USE_BSD
  261. # include <sys/types.h> /* we need int32_t... */
  262. /* These are the functions that actually do things. The `random', `srandom',
  263. `initstate' and `setstate' functions are those from BSD Unices.
  264. The `rand' and `srand' functions are required by the ANSI standard.
  265. We provide both interfaces to the same random number generator. */
  266. /* Return a random long integer between 0 and RAND_MAX inclusive. */
  267. extern long int random (void) __THROW;
  268. libc_hidden_proto(random)
  269. /* Seed the random number generator with the given number. */
  270. extern void srandom (unsigned int __seed) __THROW;
  271. /* Initialize the random number generator to use state buffer STATEBUF,
  272. of length STATELEN, and seed it with SEED. Optimal lengths are 8, 16,
  273. 32, 64, 128 and 256, the bigger the better; values less than 8 will
  274. cause an error and values greater than 256 will be rounded down. */
  275. extern char *initstate (unsigned int __seed, char *__statebuf,
  276. size_t __statelen) __THROW __nonnull ((2));
  277. /* Switch the random number generator to state buffer STATEBUF,
  278. which should have been previously initialized by `initstate'. */
  279. extern char *setstate (char *__statebuf) __THROW __nonnull ((1));
  280. # ifdef __USE_MISC
  281. /* Reentrant versions of the `random' family of functions.
  282. These functions all use the following data structure to contain
  283. state, rather than global state variables. */
  284. struct random_data
  285. {
  286. int32_t *fptr; /* Front pointer. */
  287. int32_t *rptr; /* Rear pointer. */
  288. int32_t *state; /* Array of state values. */
  289. /* random_r.c, TYPE_x, DEG_x, SEP_x - small enough for int8_t */
  290. int8_t rand_type; /* Type of random number generator. */
  291. int8_t rand_deg; /* Degree of random number generator. */
  292. int8_t rand_sep; /* Distance between front and rear. */
  293. int32_t *end_ptr; /* Pointer behind state table. */
  294. };
  295. extern int random_r (struct random_data *__restrict __buf,
  296. int32_t *__restrict __result) __THROW __nonnull ((1, 2));
  297. libc_hidden_proto(random_r)
  298. extern int srandom_r (unsigned int __seed, struct random_data *__buf)
  299. __THROW __nonnull ((2));
  300. libc_hidden_proto(srandom_r)
  301. extern int initstate_r (unsigned int __seed, char *__restrict __statebuf,
  302. size_t __statelen,
  303. struct random_data *__restrict __buf)
  304. __THROW __nonnull ((2, 4));
  305. libc_hidden_proto(initstate_r)
  306. extern int setstate_r (char *__restrict __statebuf,
  307. struct random_data *__restrict __buf)
  308. __THROW __nonnull ((1, 2));
  309. libc_hidden_proto(setstate_r)
  310. # endif /* Use misc. */
  311. #endif /* Use SVID || extended X/Open || BSD. */
  312. __BEGIN_NAMESPACE_STD
  313. /* Return a random integer between 0 and RAND_MAX inclusive. */
  314. extern int rand (void) __THROW;
  315. /* Seed the random number generator with the given number. */
  316. extern void srand (unsigned int __seed) __THROW;
  317. __END_NAMESPACE_STD
  318. #ifdef __USE_POSIX
  319. /* Reentrant interface according to POSIX.1. */
  320. extern int rand_r (unsigned int *__seed) __THROW;
  321. #endif
  322. #if defined __USE_SVID || defined __USE_XOPEN
  323. /* System V style 48-bit random number generator functions. */
  324. #ifdef __UCLIBC_HAS_FLOATS__
  325. /* Return non-negative, double-precision floating-point value in [0.0,1.0). */
  326. extern double drand48 (void) __THROW;
  327. extern double erand48 (unsigned short int __xsubi[3]) __THROW __nonnull ((1));
  328. #endif /* __UCLIBC_HAS_FLOATS__ */
  329. /* Return non-negative, long integer in [0,2^31). */
  330. extern long int lrand48 (void) __THROW;
  331. extern long int nrand48 (unsigned short int __xsubi[3])
  332. __THROW __nonnull ((1));
  333. /* Return signed, long integers in [-2^31,2^31). */
  334. extern long int mrand48 (void) __THROW;
  335. extern long int jrand48 (unsigned short int __xsubi[3])
  336. __THROW __nonnull ((1));
  337. /* Seed random number generator. */
  338. extern void srand48 (long int __seedval) __THROW;
  339. extern unsigned short int *seed48 (unsigned short int __seed16v[3])
  340. __THROW __nonnull ((1));
  341. extern void lcong48 (unsigned short int __param[7]) __THROW __nonnull ((1));
  342. # ifdef __USE_MISC
  343. /* Data structure for communication with thread safe versions. This
  344. type is to be regarded as opaque. It's only exported because users
  345. have to allocate objects of this type. */
  346. struct drand48_data
  347. {
  348. unsigned short int __x[3]; /* Current state. */
  349. unsigned short int __old_x[3]; /* Old state. */
  350. unsigned short int __c; /* Additive const. in congruential formula. */
  351. unsigned short int __init; /* Flag for initializing. */
  352. unsigned long long int __a; /* Factor in congruential formula. */
  353. };
  354. #ifdef __UCLIBC_HAS_FLOATS__
  355. /* Return non-negative, double-precision floating-point value in [0.0,1.0). */
  356. extern int drand48_r (struct drand48_data *__restrict __buffer,
  357. double *__restrict __result) __THROW __nonnull ((1, 2));
  358. extern int erand48_r (unsigned short int __xsubi[3],
  359. struct drand48_data *__restrict __buffer,
  360. double *__restrict __result) __THROW __nonnull ((1, 2));
  361. libc_hidden_proto(erand48_r)
  362. #endif /* __UCLIBC_HAS_FLOATS__ */
  363. /* Return non-negative, long integer in [0,2^31). */
  364. extern int lrand48_r (struct drand48_data *__restrict __buffer,
  365. long int *__restrict __result)
  366. __THROW __nonnull ((1, 2));
  367. libc_hidden_proto(lrand48_r)
  368. extern int nrand48_r (unsigned short int __xsubi[3],
  369. struct drand48_data *__restrict __buffer,
  370. long int *__restrict __result)
  371. __THROW __nonnull ((1, 2));
  372. libc_hidden_proto(nrand48_r)
  373. /* Return signed, long integers in [-2^31,2^31). */
  374. extern int mrand48_r (struct drand48_data *__restrict __buffer,
  375. long int *__restrict __result)
  376. __THROW __nonnull ((1, 2));
  377. extern int jrand48_r (unsigned short int __xsubi[3],
  378. struct drand48_data *__restrict __buffer,
  379. long int *__restrict __result)
  380. __THROW __nonnull ((1, 2));
  381. libc_hidden_proto(jrand48_r)
  382. /* Seed random number generator. */
  383. extern int srand48_r (long int __seedval, struct drand48_data *__buffer)
  384. __THROW __nonnull ((2));
  385. libc_hidden_proto(srand48_r)
  386. extern int seed48_r (unsigned short int __seed16v[3],
  387. struct drand48_data *__buffer) __THROW __nonnull ((1, 2));
  388. libc_hidden_proto(seed48_r)
  389. extern int lcong48_r (unsigned short int __param[7],
  390. struct drand48_data *__buffer)
  391. __THROW __nonnull ((1, 2));
  392. # endif /* Use misc. */
  393. #endif /* Use SVID or X/Open. */
  394. #endif /* don't just need malloc and calloc */
  395. #ifndef __malloc_and_calloc_defined
  396. # define __malloc_and_calloc_defined
  397. __BEGIN_NAMESPACE_STD
  398. /* Allocate SIZE bytes of memory. */
  399. extern void *malloc (size_t __size) __THROW __attribute_malloc__ __wur;
  400. /* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */
  401. extern void *calloc (size_t __nmemb, size_t __size)
  402. __THROW __attribute_malloc__ __wur;
  403. __END_NAMESPACE_STD
  404. #endif
  405. #ifndef __need_malloc_and_calloc
  406. __BEGIN_NAMESPACE_STD
  407. /* Re-allocate the previously allocated block
  408. in PTR, making the new block SIZE bytes long. */
  409. extern void *realloc (void *__ptr, size_t __size)
  410. __THROW __attribute_malloc__ __attribute_warn_unused_result__;
  411. /* Free a block allocated by `malloc', `realloc' or `calloc'. */
  412. extern void free (void *__ptr) __THROW;
  413. __END_NAMESPACE_STD
  414. #ifdef __USE_MISC
  415. /* Free a block. An alias for `free'. (Sun Unices). */
  416. extern void cfree (void *__ptr) __THROW;
  417. #endif /* Use misc. */
  418. #if defined __USE_GNU || defined __USE_BSD || defined __USE_MISC
  419. # include <alloca.h>
  420. #endif /* Use GNU, BSD, or misc. */
  421. #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
  422. /* Allocate SIZE bytes on a page boundary. The storage cannot be freed. */
  423. extern void *valloc (size_t __size) __THROW __attribute_malloc__ __wur;
  424. #endif
  425. #if defined __USE_XOPEN2K && defined __UCLIBC_HAS_ADVANCED_REALTIME__
  426. /* Allocate memory of SIZE bytes with an alignment of ALIGNMENT. */
  427. extern int posix_memalign (void **__memptr, size_t __alignment, size_t __size)
  428. __THROW __nonnull ((1)) __wur;
  429. #endif
  430. __BEGIN_NAMESPACE_STD
  431. /* Abort execution and generate a core-dump. */
  432. extern void abort (void) __THROW __attribute__ ((__noreturn__));
  433. libc_hidden_proto(abort)
  434. /* Register a function to be called when `exit' is called. */
  435. extern int atexit (void (*__func) (void)) __THROW __nonnull ((1));
  436. __END_NAMESPACE_STD
  437. #ifdef __USE_MISC
  438. /* Register a function to be called with the status
  439. given to `exit' and the given argument. */
  440. extern int on_exit (void (*__func) (int __status, void *__arg), void *__arg)
  441. __THROW __nonnull ((1));
  442. #endif
  443. __BEGIN_NAMESPACE_STD
  444. /* Call all functions registered with `atexit' and `on_exit',
  445. in the reverse of the order in which they were registered
  446. perform stdio cleanup, and terminate program execution with STATUS. */
  447. extern void exit (int __status) __THROW __attribute__ ((__noreturn__));
  448. libc_hidden_proto(exit)
  449. __END_NAMESPACE_STD
  450. #ifdef __USE_ISOC99
  451. __BEGIN_NAMESPACE_C99
  452. /* Terminate the program with STATUS without calling any of the
  453. functions registered with `atexit' or `on_exit'. */
  454. extern void _Exit (int __status) __THROW __attribute__ ((__noreturn__));
  455. __END_NAMESPACE_C99
  456. #endif
  457. __BEGIN_NAMESPACE_STD
  458. /* Return the value of envariable NAME, or NULL if it doesn't exist. */
  459. extern char *getenv (__const char *__name) __THROW __nonnull ((1)) __wur;
  460. libc_hidden_proto(getenv)
  461. __END_NAMESPACE_STD
  462. /* This function is similar to the above but returns NULL if the
  463. programs is running with SUID or SGID enabled. */
  464. extern char *__secure_getenv (__const char *__name)
  465. __THROW __nonnull ((1)) __wur;
  466. #if defined __USE_SVID || defined __USE_XOPEN
  467. /* The SVID says this is in <stdio.h>, but this seems a better place. */
  468. /* Put STRING, which is of the form "NAME=VALUE", in the environment.
  469. If there is no `=', remove NAME from the environment. */
  470. extern int putenv (char *__string) __THROW __nonnull ((1));
  471. #endif
  472. #if defined __USE_BSD || defined __USE_XOPEN2K
  473. /* Set NAME to VALUE in the environment.
  474. If REPLACE is nonzero, overwrite an existing value. */
  475. extern int setenv (__const char *__name, __const char *__value, int __replace)
  476. __THROW __nonnull ((2));
  477. libc_hidden_proto(setenv)
  478. /* Remove the variable NAME from the environment. */
  479. extern int unsetenv (__const char *__name) __THROW;
  480. libc_hidden_proto(unsetenv)
  481. #endif
  482. /* The following is used by uClibc in atexit.c and sysconf.c */
  483. /* We have no limit when __UCLIBC_DYNAMIC_ATEXIT__ is enabled. */
  484. #ifdef __UCLIBC_DYNAMIC_ATEXIT__
  485. # define __UCLIBC_MAX_ATEXIT INT_MAX
  486. #else
  487. # define __UCLIBC_MAX_ATEXIT 20
  488. #endif
  489. #ifdef __USE_MISC
  490. /* The `clearenv' was planned to be added to POSIX.1 but probably
  491. never made it. Nevertheless the POSIX.9 standard (POSIX bindings
  492. for Fortran 77) requires this function. */
  493. extern int clearenv (void) __THROW;
  494. #endif
  495. #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
  496. /* Generate a unique temporary file name from TEMPLATE.
  497. The last six characters of TEMPLATE must be "XXXXXX";
  498. they are replaced with a string that makes the file name unique.
  499. Returns TEMPLATE, or a null pointer if it cannot get a unique file name. */
  500. extern char *mktemp (char *__template) __THROW __nonnull ((1)) __wur;
  501. /* Generate a unique temporary file name from TEMPLATE.
  502. The last six characters of TEMPLATE must be "XXXXXX";
  503. they are replaced with a string that makes the filename unique.
  504. Returns a file descriptor open on the file for reading and writing,
  505. or -1 if it cannot create a uniquely-named file.
  506. This function is a possible cancellation points and therefore not
  507. marked with __THROW. */
  508. # ifndef __USE_FILE_OFFSET64
  509. extern int mkstemp (char *__template) __nonnull ((1)) __wur;
  510. # else
  511. # ifdef __REDIRECT
  512. extern int __REDIRECT (mkstemp, (char *__template), mkstemp64)
  513. __nonnull ((1)) __wur;
  514. # else
  515. # define mkstemp mkstemp64
  516. # endif
  517. # endif
  518. # ifdef __USE_LARGEFILE64
  519. extern int mkstemp64 (char *__template) __nonnull ((1)) __wur;
  520. # endif
  521. #endif
  522. #ifdef __USE_BSD
  523. /* Create a unique temporary directory from TEMPLATE.
  524. The last six characters of TEMPLATE must be "XXXXXX";
  525. they are replaced with a string that makes the directory name unique.
  526. Returns TEMPLATE, or a null pointer if it cannot get a unique name.
  527. The directory is created mode 700. */
  528. extern char *mkdtemp (char *__template) __THROW __nonnull ((1)) __wur;
  529. #endif
  530. __BEGIN_NAMESPACE_STD
  531. /* Execute the given line as a shell command.
  532. This function is a cancellation point and therefore not marked with
  533. __THROW. */
  534. extern int system (__const char *__command) __wur;
  535. __END_NAMESPACE_STD
  536. #if 0 /* def __USE_GNU */
  537. /* Return a malloc'd string containing the canonical absolute name of the
  538. named file. The last file name component need not exist, and may be a
  539. symlink to a nonexistent file. */
  540. extern char *canonicalize_file_name (__const char *__name)
  541. __THROW __nonnull ((1)) __wur;
  542. #endif
  543. #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
  544. /* Return the canonical absolute name of file NAME. The last file name
  545. component need not exist, and may be a symlink to a nonexistent file.
  546. If RESOLVED is null, the result is malloc'd; otherwise, if the canonical
  547. name is PATH_MAX chars or more, returns null with `errno' set to
  548. ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars, returns the
  549. name in RESOLVED. */
  550. /* we choose to handle __resolved==NULL as crash :) */
  551. extern char *realpath (__const char *__restrict __name,
  552. char *__restrict __resolved) __THROW __wur __nonnull((2));
  553. #endif
  554. /* Shorthand for type of comparison functions. */
  555. #ifndef __COMPAR_FN_T
  556. # define __COMPAR_FN_T
  557. typedef int (*__compar_fn_t) (__const void *, __const void *);
  558. # ifdef __USE_GNU
  559. typedef __compar_fn_t comparison_fn_t;
  560. # endif
  561. #endif
  562. __BEGIN_NAMESPACE_STD
  563. /* Do a binary search for KEY in BASE, which consists of NMEMB elements
  564. of SIZE bytes each, using COMPAR to perform the comparisons. */
  565. extern void *bsearch (__const void *__key, __const void *__base,
  566. size_t __nmemb, size_t __size, __compar_fn_t __compar)
  567. __nonnull ((1, 2, 5)) __wur;
  568. /* Sort NMEMB elements of BASE, of SIZE bytes each,
  569. using COMPAR to perform the comparisons. */
  570. extern void qsort (void *__base, size_t __nmemb, size_t __size,
  571. __compar_fn_t __compar) __nonnull ((1, 4));
  572. libc_hidden_proto(qsort)
  573. /* Return the absolute value of X. */
  574. extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur;
  575. extern long int labs (long int __x) __THROW __attribute__ ((__const__)) __wur;
  576. __END_NAMESPACE_STD
  577. #ifdef __USE_ISOC99
  578. __extension__ extern long long int llabs (long long int __x)
  579. __THROW __attribute__ ((__const__)) __wur;
  580. #endif
  581. __BEGIN_NAMESPACE_STD
  582. /* Return the `div_t', `ldiv_t' or `lldiv_t' representation
  583. of the value of NUMER over DENOM. */
  584. /* GCC may have built-ins for these someday. */
  585. extern div_t div (int __numer, int __denom)
  586. __THROW __attribute__ ((__const__)) __wur;
  587. extern ldiv_t ldiv (long int __numer, long int __denom)
  588. __THROW __attribute__ ((__const__)) __wur;
  589. __END_NAMESPACE_STD
  590. #ifdef __USE_ISOC99
  591. __BEGIN_NAMESPACE_C99
  592. __extension__ extern lldiv_t lldiv (long long int __numer,
  593. long long int __denom)
  594. __THROW __attribute__ ((__const__)) __wur;
  595. __END_NAMESPACE_C99
  596. #endif
  597. #if defined __USE_SVID || defined __USE_XOPEN_EXTENDED || defined __USE_BSD
  598. /* Convert floating point numbers to strings. The returned values are
  599. valid only until another call to the same function. */
  600. # ifdef __UCLIBC_SUSV3_LEGACY__
  601. #if 0
  602. /* Convert VALUE to a string with NDIGIT digits and return a pointer to
  603. this. Set *DECPT with the position of the decimal character and *SIGN
  604. with the sign of the number. */
  605. extern char *ecvt (double __value, int __ndigit, int *__restrict __decpt,
  606. int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur;
  607. /* Convert VALUE to a string rounded to NDIGIT decimal digits. Set *DECPT
  608. with the position of the decimal character and *SIGN with the sign of
  609. the number. */
  610. extern char *fcvt (double __value, int __ndigit, int *__restrict __decpt,
  611. int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur;
  612. #endif
  613. /* If possible convert VALUE to a string with NDIGIT significant digits.
  614. Otherwise use exponential representation. The resulting string will
  615. be written to BUF. */
  616. extern char *gcvt (double __value, int __ndigit, char *__buf)
  617. __THROW __nonnull ((3)) __wur;
  618. # endif /* __UCLIBC_SUSV3_LEGACY__ */
  619. # if 0 /*def __USE_MISC*/
  620. /* Long double versions of above functions. */
  621. extern char *qecvt (long double __value, int __ndigit,
  622. int *__restrict __decpt, int *__restrict __sign)
  623. __THROW __nonnull ((3, 4)) __wur;
  624. extern char *qfcvt (long double __value, int __ndigit,
  625. int *__restrict __decpt, int *__restrict __sign)
  626. __THROW __nonnull ((3, 4)) __wur;
  627. extern char *qgcvt (long double __value, int __ndigit, char *__buf)
  628. __THROW __nonnull ((3)) __wur;
  629. /* Reentrant version of the functions above which provide their own
  630. buffers. */
  631. extern int ecvt_r (double __value, int __ndigit, int *__restrict __decpt,
  632. int *__restrict __sign, char *__restrict __buf,
  633. size_t __len) __THROW __nonnull ((3, 4, 5));
  634. extern int fcvt_r (double __value, int __ndigit, int *__restrict __decpt,
  635. int *__restrict __sign, char *__restrict __buf,
  636. size_t __len) __THROW __nonnull ((3, 4, 5));
  637. extern int qecvt_r (long double __value, int __ndigit,
  638. int *__restrict __decpt, int *__restrict __sign,
  639. char *__restrict __buf, size_t __len)
  640. __THROW __nonnull ((3, 4, 5));
  641. extern int qfcvt_r (long double __value, int __ndigit,
  642. int *__restrict __decpt, int *__restrict __sign,
  643. char *__restrict __buf, size_t __len)
  644. __THROW __nonnull ((3, 4, 5));
  645. # endif /* misc */
  646. #endif /* use MISC || use X/Open Unix */
  647. #ifdef __UCLIBC_HAS_WCHAR__
  648. __BEGIN_NAMESPACE_STD
  649. /* Return the length of the multibyte character
  650. in S, which is no longer than N. */
  651. extern int mblen (__const char *__s, size_t __n) __THROW __wur;
  652. /* Return the length of the given multibyte character,
  653. putting its `wchar_t' representation in *PWC. */
  654. extern int mbtowc (wchar_t *__restrict __pwc,
  655. __const char *__restrict __s, size_t __n) __THROW __wur;
  656. /* Put the multibyte character represented
  657. by WCHAR in S, returning its length. */
  658. extern int wctomb (char *__s, wchar_t __wchar) __THROW __wur;
  659. /* Convert a multibyte string to a wide char string. */
  660. extern size_t mbstowcs (wchar_t *__restrict __pwcs,
  661. __const char *__restrict __s, size_t __n) __THROW;
  662. /* Convert a wide char string to multibyte string. */
  663. extern size_t wcstombs (char *__restrict __s,
  664. __const wchar_t *__restrict __pwcs, size_t __n)
  665. __THROW;
  666. __END_NAMESPACE_STD
  667. #endif /* __UCLIBC_HAS_WCHAR__ */
  668. #ifdef __USE_SVID
  669. /* Determine whether the string value of RESPONSE matches the affirmation
  670. or negative response expression as specified by the LC_MESSAGES category
  671. in the program's current locale. Returns 1 if affirmative, 0 if
  672. negative, and -1 if not matching. */
  673. extern int rpmatch (__const char *__response) __THROW __nonnull ((1)) __wur;
  674. #endif
  675. #ifdef __USE_XOPEN_EXTENDED
  676. /* Parse comma separated suboption from *OPTIONP and match against
  677. strings in TOKENS. If found return index and set *VALUEP to
  678. optional value introduced by an equal sign. If the suboption is
  679. not part of TOKENS return in *VALUEP beginning of unknown
  680. suboption. On exit *OPTIONP is set to the beginning of the next
  681. token or at the terminating NUL character. */
  682. extern int getsubopt (char **__restrict __optionp,
  683. char *__const *__restrict __tokens,
  684. char **__restrict __valuep)
  685. __THROW __nonnull ((1, 2, 3)) __wur;
  686. #endif
  687. #ifdef __USE_XOPEN
  688. # if defined __UCLIBC_HAS_CRYPT__
  689. /* Setup DES tables according KEY. */
  690. extern void setkey (__const char *__key) __THROW __nonnull ((1));
  691. # endif /* __UCLIBC_HAS_CRYPT__ */
  692. #endif
  693. /* X/Open pseudo terminal handling. */
  694. #ifdef __USE_XOPEN2K
  695. /* Return a master pseudo-terminal handle. */
  696. extern int posix_openpt (int __oflag) __wur;
  697. libc_hidden_proto(posix_openpt)
  698. #endif
  699. #ifdef __USE_XOPEN
  700. /* The next four functions all take a master pseudo-tty fd and
  701. perform an operation on the associated slave: */
  702. #ifdef __UCLIBC_HAS_PTY__
  703. /* Chown the slave to the calling user. */
  704. extern int grantpt (int __fd) __THROW;
  705. /* Release an internal lock so the slave can be opened.
  706. Call after grantpt(). */
  707. extern int unlockpt (int __fd) __THROW;
  708. /* Return the pathname of the pseudo terminal slave assoicated with
  709. the master FD is open on, or NULL on errors.
  710. The returned storage is good until the next call to this function. */
  711. extern char *ptsname (int __fd) __THROW __wur;
  712. #endif /* __UCLIBC_HAS_PTY__ */
  713. #endif
  714. #ifdef __USE_GNU
  715. # if defined __UCLIBC_HAS_PTY__
  716. /* Store at most BUFLEN characters of the pathname of the slave pseudo
  717. terminal associated with the master FD is open on in BUF.
  718. Return 0 on success, otherwise an error number. */
  719. extern int ptsname_r (int __fd, char *__buf, size_t __buflen)
  720. __THROW __nonnull ((2));
  721. libc_hidden_proto(ptsname_r)
  722. # endif
  723. # if defined __UCLIBC_HAS_GETPT__
  724. /* Open a master pseudo terminal and return its file descriptor. */
  725. extern int getpt (void);
  726. # endif
  727. #endif
  728. #if 0 /* def __USE_BSD */
  729. /* Put the 1 minute, 5 minute and 15 minute load averages into the first
  730. NELEM elements of LOADAVG. Return the number written (never more than
  731. three, but may be less than NELEM), or -1 if an error occurred. */
  732. extern int getloadavg (double __loadavg[], int __nelem)
  733. __THROW __nonnull ((1));
  734. #endif
  735. #ifdef __UCLIBC_HAS_ARC4RANDOM__
  736. #include <stdint.h>
  737. extern uint32_t arc4random(void);
  738. extern void arc4random_stir(void);
  739. libc_hidden_proto(arc4random_stir)
  740. extern void arc4random_addrandom(unsigned char *, int);
  741. #endif
  742. #endif /* don't just need malloc and calloc */
  743. #undef __need_malloc_and_calloc
  744. __END_DECLS
  745. #endif /* stdlib.h */