stdlib.h 26 KB

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  1. /* Copyright (C) 1991-2002, 2003 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. #endif /* X/Open and <sys/wait.h> not included. */
  75. __BEGIN_NAMESPACE_STD
  76. /* Returned by `div'. */
  77. typedef struct
  78. {
  79. int quot; /* Quotient. */
  80. int rem; /* Remainder. */
  81. } div_t;
  82. /* Returned by `ldiv'. */
  83. #ifndef __ldiv_t_defined
  84. typedef struct
  85. {
  86. long int quot; /* Quotient. */
  87. long int rem; /* Remainder. */
  88. } ldiv_t;
  89. # define __ldiv_t_defined 1
  90. #endif
  91. __END_NAMESPACE_STD
  92. #if defined __USE_ISOC99 && !defined __lldiv_t_defined
  93. __BEGIN_NAMESPACE_C99
  94. /* Returned by `lldiv'. */
  95. __extension__ typedef struct
  96. {
  97. long long int quot; /* Quotient. */
  98. long long int rem; /* Remainder. */
  99. } lldiv_t;
  100. # define __lldiv_t_defined 1
  101. __END_NAMESPACE_C99
  102. #endif
  103. /* The largest number rand will return (same as INT_MAX). */
  104. #define RAND_MAX 2147483647
  105. /* We define these the same for all machines.
  106. Changes from this to the outside world should be done in `_exit'. */
  107. #define EXIT_FAILURE 1 /* Failing exit status. */
  108. #define EXIT_SUCCESS 0 /* Successful exit status. */
  109. /* Maximum length of a multibyte character in the current locale. */
  110. /* #define MB_CUR_MAX (__ctype_get_mb_cur_max ()) */
  111. /* extern size_t __ctype_get_mb_cur_max (void) __THROW; */
  112. #ifdef __UCLIBC_HAS_WCHAR__
  113. /* Maximum length of a multibyte character in the current locale. */
  114. #define MB_CUR_MAX (_stdlib_mb_cur_max ())
  115. extern size_t _stdlib_mb_cur_max (void) __THROW;
  116. #endif
  117. __BEGIN_NAMESPACE_STD
  118. #ifdef __UCLIBC_HAS_FLOATS__
  119. /* Convert a string to a floating-point number. */
  120. extern double atof (__const char *__nptr) __THROW __attribute_pure__;
  121. #endif /* __UCLIBC_HAS_FLOATS__ */
  122. /* Convert a string to an integer. */
  123. extern int atoi (__const char *__nptr) __THROW __attribute_pure__;
  124. /* Convert a string to a long integer. */
  125. extern long int atol (__const char *__nptr) __THROW __attribute_pure__;
  126. __END_NAMESPACE_STD
  127. #if defined __USE_ISOC99 || defined __USE_MISC
  128. __BEGIN_NAMESPACE_C99
  129. /* Convert a string to a long long integer. */
  130. __extension__ extern long long int atoll (__const char *__nptr)
  131. __THROW __attribute_pure__;
  132. __END_NAMESPACE_C99
  133. #endif
  134. #ifdef __UCLIBC_HAS_FLOATS__
  135. __BEGIN_NAMESPACE_STD
  136. /* Convert a string to a floating-point number. */
  137. extern double strtod (__const char *__restrict __nptr,
  138. char **__restrict __endptr) __THROW;
  139. __END_NAMESPACE_STD
  140. #ifdef __USE_ISOC99
  141. __BEGIN_NAMESPACE_C99
  142. /* Likewise for `float' and `long double' sizes of floating-point numbers. */
  143. extern float strtof (__const char *__restrict __nptr,
  144. char **__restrict __endptr) __THROW;
  145. extern long double strtold (__const char *__restrict __nptr,
  146. char **__restrict __endptr) __THROW;
  147. __END_NAMESPACE_C99
  148. #endif
  149. #endif /* __UCLIBC_HAS_FLOATS__ */
  150. __BEGIN_NAMESPACE_STD
  151. /* Convert a string to a long integer. */
  152. extern long int strtol (__const char *__restrict __nptr,
  153. char **__restrict __endptr, int __base) __THROW;
  154. /* Convert a string to an unsigned long integer. */
  155. extern unsigned long int strtoul (__const char *__restrict __nptr,
  156. char **__restrict __endptr, int __base)
  157. __THROW;
  158. __END_NAMESPACE_C99
  159. #if defined __USE_BSD
  160. /* Convert a string to a quadword integer. */
  161. __extension__
  162. extern long long int strtoq (__const char *__restrict __nptr,
  163. char **__restrict __endptr, int __base) __THROW;
  164. /* Convert a string to an unsigned quadword integer. */
  165. __extension__
  166. extern unsigned long long int strtouq (__const char *__restrict __nptr,
  167. char **__restrict __endptr, int __base)
  168. __THROW;
  169. #endif /* GCC and use BSD. */
  170. #if defined __USE_ISOC99 || defined __USE_MISC
  171. __BEGIN_NAMESPACE_C99
  172. /* Convert a string to a quadword integer. */
  173. __extension__
  174. extern long long int strtoll (__const char *__restrict __nptr,
  175. char **__restrict __endptr, int __base) __THROW;
  176. /* Convert a string to an unsigned quadword integer. */
  177. __extension__
  178. extern unsigned long long int strtoull (__const char *__restrict __nptr,
  179. char **__restrict __endptr, int __base)
  180. __THROW;
  181. __END_NAMESPACE_C99
  182. #endif /* ISO C99 or GCC and use MISC. */
  183. #ifdef __UCLIBC_HAS_XLOCALE__
  184. #ifdef __USE_GNU
  185. /* The concept of one static locale per category is not very well
  186. thought out. Many applications will need to process its data using
  187. information from several different locales. Another application is
  188. the implementation of the internationalization handling in the
  189. upcoming ISO C++ standard library. To support this another set of
  190. the functions using locale data exist which have an additional
  191. argument.
  192. Attention: all these functions are *not* standardized in any form.
  193. This is a proof-of-concept implementation. */
  194. /* Structure for reentrant locale using functions. This is an
  195. (almost) opaque type for the user level programs. */
  196. # include <xlocale.h>
  197. /* Special versions of the functions above which take the locale to
  198. use as an additional parameter. */
  199. extern long int strtol_l (__const char *__restrict __nptr,
  200. char **__restrict __endptr, int __base,
  201. __locale_t __loc) __THROW;
  202. extern unsigned long int strtoul_l (__const char *__restrict __nptr,
  203. char **__restrict __endptr,
  204. int __base, __locale_t __loc) __THROW;
  205. __extension__
  206. extern long long int strtoll_l (__const char *__restrict __nptr,
  207. char **__restrict __endptr, int __base,
  208. __locale_t __loc) __THROW;
  209. __extension__
  210. extern unsigned long long int strtoull_l (__const char *__restrict __nptr,
  211. char **__restrict __endptr,
  212. int __base, __locale_t __loc)
  213. __THROW;
  214. extern double strtod_l (__const char *__restrict __nptr,
  215. char **__restrict __endptr, __locale_t __loc)
  216. __THROW;
  217. extern float strtof_l (__const char *__restrict __nptr,
  218. char **__restrict __endptr, __locale_t __loc) __THROW;
  219. extern long double strtold_l (__const char *__restrict __nptr,
  220. char **__restrict __endptr,
  221. __locale_t __loc) __THROW;
  222. /* Internal names to support libstd++. */
  223. extern long int __strtol_l (__const char *__restrict __nptr,
  224. char **__restrict __endptr, int __base,
  225. __locale_t __loc) __THROW;
  226. extern unsigned long int __strtoul_l (__const char *__restrict __nptr,
  227. char **__restrict __endptr,
  228. int __base, __locale_t __loc) __THROW;
  229. __extension__
  230. extern long long int __strtoll_l (__const char *__restrict __nptr,
  231. char **__restrict __endptr, int __base,
  232. __locale_t __loc) __THROW;
  233. __extension__
  234. extern unsigned long long int __strtoull_l (__const char *__restrict __nptr,
  235. char **__restrict __endptr,
  236. int __base, __locale_t __loc)
  237. __THROW;
  238. extern double __strtod_l (__const char *__restrict __nptr,
  239. char **__restrict __endptr, __locale_t __loc)
  240. __THROW;
  241. extern float __strtof_l (__const char *__restrict __nptr,
  242. char **__restrict __endptr, __locale_t __loc) __THROW;
  243. extern long double __strtold_l (__const char *__restrict __nptr,
  244. char **__restrict __endptr,
  245. __locale_t __loc) __THROW;
  246. #endif /* GNU */
  247. #endif /* __UCLIBC_HAS_XLOCALE__ */
  248. #if defined __USE_SVID || defined __USE_XOPEN_EXTENDED
  249. /* Convert N to base 64 using the digits "./0-9A-Za-z", least-significant
  250. digit first. Returns a pointer to static storage overwritten by the
  251. next call. */
  252. extern char *l64a (long int __n) __THROW;
  253. /* Read a number from a string S in base 64 as above. */
  254. extern long int a64l (__const char *__s) __THROW __attribute_pure__;
  255. #endif /* Use SVID || extended X/Open. */
  256. #if defined __USE_SVID || defined __USE_XOPEN_EXTENDED || defined __USE_BSD
  257. # include <sys/types.h> /* we need int32_t... */
  258. /* These are the functions that actually do things. The `random', `srandom',
  259. `initstate' and `setstate' functions are those from BSD Unices.
  260. The `rand' and `srand' functions are required by the ANSI standard.
  261. We provide both interfaces to the same random number generator. */
  262. /* Return a random long integer between 0 and RAND_MAX inclusive. */
  263. extern long int random (void) __THROW;
  264. /* Seed the random number generator with the given number. */
  265. extern void srandom (unsigned int __seed) __THROW;
  266. /* Initialize the random number generator to use state buffer STATEBUF,
  267. of length STATELEN, and seed it with SEED. Optimal lengths are 8, 16,
  268. 32, 64, 128 and 256, the bigger the better; values less than 8 will
  269. cause an error and values greater than 256 will be rounded down. */
  270. extern char *initstate (unsigned int __seed, char *__statebuf,
  271. size_t __statelen) __THROW;
  272. /* Switch the random number generator to state buffer STATEBUF,
  273. which should have been previously initialized by `initstate'. */
  274. extern char *setstate (char *__statebuf) __THROW;
  275. # ifdef __USE_MISC
  276. /* Reentrant versions of the `random' family of functions.
  277. These functions all use the following data structure to contain
  278. state, rather than global state variables. */
  279. struct random_data
  280. {
  281. int32_t *fptr; /* Front pointer. */
  282. int32_t *rptr; /* Rear pointer. */
  283. int32_t *state; /* Array of state values. */
  284. int rand_type; /* Type of random number generator. */
  285. int rand_deg; /* Degree of random number generator. */
  286. int rand_sep; /* Distance between front and rear. */
  287. int32_t *end_ptr; /* Pointer behind state table. */
  288. };
  289. extern int random_r (struct random_data *__restrict __buf,
  290. int32_t *__restrict __result) __THROW;
  291. extern int srandom_r (unsigned int __seed, struct random_data *__buf) __THROW;
  292. extern int initstate_r (unsigned int __seed, char *__restrict __statebuf,
  293. size_t __statelen,
  294. struct random_data *__restrict __buf) __THROW;
  295. extern int setstate_r (char *__restrict __statebuf,
  296. struct random_data *__restrict __buf) __THROW;
  297. # endif /* Use misc. */
  298. #endif /* Use SVID || extended X/Open || BSD. */
  299. __BEGIN_NAMESPACE_STD
  300. /* Return a random integer between 0 and RAND_MAX inclusive. */
  301. extern int rand (void) __THROW;
  302. /* Seed the random number generator with the given number. */
  303. extern void srand (unsigned int __seed) __THROW;
  304. __END_NAMESPACE_STD
  305. #ifdef __USE_POSIX
  306. /* Reentrant interface according to POSIX.1. */
  307. extern int rand_r (unsigned int *__seed) __THROW;
  308. #endif
  309. #if defined __USE_SVID || defined __USE_XOPEN
  310. /* System V style 48-bit random number generator functions. */
  311. #ifdef __UCLIBC_HAS_FLOATS__
  312. /* Return non-negative, double-precision floating-point value in [0.0,1.0). */
  313. extern double drand48 (void) __THROW;
  314. extern double erand48 (unsigned short int __xsubi[3]) __THROW;
  315. #endif /* __UCLIBC_HAS_FLOATS__ */
  316. /* Return non-negative, long integer in [0,2^31). */
  317. extern long int lrand48 (void) __THROW;
  318. extern long int nrand48 (unsigned short int __xsubi[3]) __THROW;
  319. /* Return signed, long integers in [-2^31,2^31). */
  320. extern long int mrand48 (void) __THROW;
  321. extern long int jrand48 (unsigned short int __xsubi[3]) __THROW;
  322. /* Seed random number generator. */
  323. extern void srand48 (long int __seedval) __THROW;
  324. extern unsigned short int *seed48 (unsigned short int __seed16v[3]) __THROW;
  325. extern void lcong48 (unsigned short int __param[7]) __THROW;
  326. # ifdef __USE_MISC
  327. /* Data structure for communication with thread safe versions. This
  328. type is to be regarded as opaque. It's only exported because users
  329. have to allocate objects of this type. */
  330. struct drand48_data
  331. {
  332. unsigned short int __x[3]; /* Current state. */
  333. unsigned short int __old_x[3]; /* Old state. */
  334. unsigned short int __c; /* Additive const. in congruential formula. */
  335. unsigned short int __init; /* Flag for initializing. */
  336. unsigned long long int __a; /* Factor in congruential formula. */
  337. };
  338. #ifdef __UCLIBC_HAS_FLOATS__
  339. /* Return non-negative, double-precision floating-point value in [0.0,1.0). */
  340. extern int drand48_r (struct drand48_data *__restrict __buffer,
  341. double *__restrict __result) __THROW;
  342. extern int erand48_r (unsigned short int __xsubi[3],
  343. struct drand48_data *__restrict __buffer,
  344. double *__restrict __result) __THROW;
  345. #endif /* __UCLIBC_HAS_FLOATS__ */
  346. /* Return non-negative, long integer in [0,2^31). */
  347. extern int lrand48_r (struct drand48_data *__restrict __buffer,
  348. long int *__restrict __result) __THROW;
  349. extern int nrand48_r (unsigned short int __xsubi[3],
  350. struct drand48_data *__restrict __buffer,
  351. long int *__restrict __result) __THROW;
  352. /* Return signed, long integers in [-2^31,2^31). */
  353. extern int mrand48_r (struct drand48_data *__restrict __buffer,
  354. long int *__restrict __result) __THROW;
  355. extern int jrand48_r (unsigned short int __xsubi[3],
  356. struct drand48_data *__restrict __buffer,
  357. long int *__restrict __result) __THROW;
  358. /* Seed random number generator. */
  359. extern int srand48_r (long int __seedval, struct drand48_data *__buffer)
  360. __THROW;
  361. extern int seed48_r (unsigned short int __seed16v[3],
  362. struct drand48_data *__buffer) __THROW;
  363. extern int lcong48_r (unsigned short int __param[7],
  364. struct drand48_data *__buffer) __THROW;
  365. # endif /* Use misc. */
  366. #endif /* Use SVID or X/Open. */
  367. #endif /* don't just need malloc and calloc */
  368. #ifndef __malloc_and_calloc_defined
  369. # define __malloc_and_calloc_defined
  370. __BEGIN_NAMESPACE_STD
  371. /* Allocate SIZE bytes of memory. */
  372. extern void *malloc (size_t __size) __THROW __attribute_malloc__;
  373. /* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */
  374. extern void *calloc (size_t __nmemb, size_t __size)
  375. __THROW __attribute_malloc__;
  376. __END_NAMESPACE_STD
  377. #endif
  378. #ifndef __need_malloc_and_calloc
  379. __BEGIN_NAMESPACE_STD
  380. /* Re-allocate the previously allocated block
  381. in PTR, making the new block SIZE bytes long. */
  382. extern void *realloc (void *__ptr, size_t __size) __THROW __attribute_malloc__;
  383. /* Free a block allocated by `malloc', `realloc' or `calloc'. */
  384. extern void free (void *__ptr) __THROW;
  385. __END_NAMESPACE_STD
  386. #ifdef __USE_MISC
  387. /* Free a block. An alias for `free'. (Sun Unices). */
  388. extern void cfree (void *__ptr) __THROW;
  389. #endif /* Use misc. */
  390. #if defined __USE_GNU || defined __USE_BSD || defined __USE_MISC
  391. # include <alloca.h>
  392. #endif /* Use GNU, BSD, or misc. */
  393. #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
  394. /* Allocate SIZE bytes on a page boundary. The storage cannot be freed. */
  395. extern void *valloc (size_t __size) __THROW __attribute_malloc__;
  396. #endif
  397. #ifdef __USE_XOPEN2K
  398. /* Allocate memory of SIZE bytes with an alignment of ALIGNMENT. */
  399. extern int posix_memalign (void **__memptr, size_t __alignment, size_t __size)
  400. __THROW __attribute_malloc__;
  401. #endif
  402. __BEGIN_NAMESPACE_STD
  403. /* Abort execution and generate a core-dump. */
  404. extern void abort (void) __THROW __attribute__ ((__noreturn__));
  405. /* Register a function to be called when `exit' is called. */
  406. extern int atexit (void (*__func) (void)) __THROW;
  407. __END_NAMESPACE_STD
  408. #ifdef __USE_MISC
  409. /* Register a function to be called with the status
  410. given to `exit' and the given argument. */
  411. extern int on_exit (void (*__func) (int __status, void *__arg), void *__arg)
  412. __THROW;
  413. #endif
  414. __BEGIN_NAMESPACE_STD
  415. /* Call all functions registered with `atexit' and `on_exit',
  416. in the reverse of the order in which they were registered
  417. perform stdio cleanup, and terminate program execution with STATUS. */
  418. extern void exit (int __status) __THROW __attribute__ ((__noreturn__));
  419. __END_NAMESPACE_STD
  420. #ifdef __USE_ISOC99
  421. __BEGIN_NAMESPACE_C99
  422. /* Terminate the program with STATUS without calling any of the
  423. functions registered with `atexit' or `on_exit'. */
  424. extern void _Exit (int __status) __THROW __attribute__ ((__noreturn__));
  425. __END_NAMESPACE_C99
  426. #endif
  427. __BEGIN_NAMESPACE_STD
  428. /* Return the value of envariable NAME, or NULL if it doesn't exist. */
  429. extern char *getenv (__const char *__name) __THROW;
  430. __END_NAMESPACE_STD
  431. /* This function is similar to the above but returns NULL if the
  432. programs is running with SUID or SGID enabled. */
  433. extern char *__secure_getenv (__const char *__name) __THROW;
  434. #if defined __USE_SVID || defined __USE_XOPEN
  435. /* The SVID says this is in <stdio.h>, but this seems a better place. */
  436. /* Put STRING, which is of the form "NAME=VALUE", in the environment.
  437. If there is no `=', remove NAME from the environment. */
  438. extern int putenv (char *__string) __THROW;
  439. #endif
  440. #if defined __USE_BSD || defined __USE_XOPEN2K
  441. /* Set NAME to VALUE in the environment.
  442. If REPLACE is nonzero, overwrite an existing value. */
  443. extern int setenv (__const char *__name, __const char *__value, int __replace)
  444. __THROW;
  445. /* Remove the variable NAME from the environment. */
  446. extern int unsetenv (__const char *__name) __THROW;
  447. #endif
  448. /* The following is used by uClibc in atexit.c and sysconf.c */
  449. /* We have no limit when __UCLIBC_DYNAMIC_ATEXIT__ is enabled. */
  450. #ifdef __UCLIBC_DYNAMIC_ATEXIT__
  451. # define __UCLIBC_MAX_ATEXIT INT_MAX
  452. #else
  453. # define __UCLIBC_MAX_ATEXIT 20
  454. #endif
  455. #ifdef __USE_MISC
  456. /* The `clearenv' was planned to be added to POSIX.1 but probably
  457. never made it. Nevertheless the POSIX.9 standard (POSIX bindings
  458. for Fortran 77) requires this function. */
  459. extern int clearenv (void) __THROW;
  460. #endif
  461. #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
  462. /* Generate a unique temporary file name from TEMPLATE.
  463. The last six characters of TEMPLATE must be "XXXXXX";
  464. they are replaced with a string that makes the file name unique.
  465. Returns TEMPLATE, or a null pointer if it cannot get a unique file name. */
  466. extern char *mktemp (char *__template) __THROW;
  467. /* Generate a unique temporary file name from TEMPLATE.
  468. The last six characters of TEMPLATE must be "XXXXXX";
  469. they are replaced with a string that makes the filename unique.
  470. Returns a file descriptor open on the file for reading and writing,
  471. or -1 if it cannot create a uniquely-named file.
  472. This function is a possible cancellation points and therefore not
  473. marked with __THROW. */
  474. # ifndef __USE_FILE_OFFSET64
  475. extern int mkstemp (char *__template);
  476. # else
  477. # ifdef __REDIRECT
  478. extern int __REDIRECT (mkstemp, (char *__template), mkstemp64);
  479. # else
  480. # define mkstemp mkstemp64
  481. # endif
  482. # endif
  483. # ifdef __USE_LARGEFILE64
  484. extern int mkstemp64 (char *__template);
  485. # endif
  486. #endif
  487. #ifdef __USE_BSD
  488. /* Create a unique temporary directory from TEMPLATE.
  489. The last six characters of TEMPLATE must be "XXXXXX";
  490. they are replaced with a string that makes the directory name unique.
  491. Returns TEMPLATE, or a null pointer if it cannot get a unique name.
  492. The directory is created mode 700. */
  493. extern char *mkdtemp (char *__template) __THROW;
  494. #endif
  495. __BEGIN_NAMESPACE_STD
  496. /* Execute the given line as a shell command.
  497. This function is a cancellation point and therefore not marked with
  498. __THROW. */
  499. extern int system (__const char *__command);
  500. __END_NAMESPACE_STD
  501. #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
  502. /* Return the canonical absolute name of file NAME. The last file name
  503. component need not exist, and may be a symlink to a nonexistent file.
  504. If RESOLVED is null, the result is malloc'd; otherwise, if the canonical
  505. name is PATH_MAX chars or more, returns null with `errno' set to
  506. ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars, returns the
  507. name in RESOLVED. */
  508. extern char *realpath (__const char *__restrict __name,
  509. char *__restrict __resolved) __THROW;
  510. #endif
  511. /* Shorthand for type of comparison functions. */
  512. #ifndef __COMPAR_FN_T
  513. # define __COMPAR_FN_T
  514. typedef int (*__compar_fn_t) (__const void *, __const void *);
  515. # ifdef __USE_GNU
  516. typedef __compar_fn_t comparison_fn_t;
  517. # endif
  518. #endif
  519. __BEGIN_NAMESPACE_STD
  520. /* Do a binary search for KEY in BASE, which consists of NMEMB elements
  521. of SIZE bytes each, using COMPAR to perform the comparisons. */
  522. extern void *bsearch (__const void *__key, __const void *__base,
  523. size_t __nmemb, size_t __size, __compar_fn_t __compar);
  524. /* Sort NMEMB elements of BASE, of SIZE bytes each,
  525. using COMPAR to perform the comparisons. */
  526. extern void qsort (void *__base, size_t __nmemb, size_t __size,
  527. __compar_fn_t __compar);
  528. /* Return the absolute value of X. */
  529. extern int abs (int __x) __THROW __attribute__ ((__const__));
  530. extern long int labs (long int __x) __THROW __attribute__ ((__const__));
  531. __END_NAMESPACE_STD
  532. #ifdef __USE_ISOC99
  533. __extension__ extern long long int llabs (long long int __x)
  534. __THROW __attribute__ ((__const__));
  535. #endif
  536. __BEGIN_NAMESPACE_STD
  537. /* Return the `div_t', `ldiv_t' or `lldiv_t' representation
  538. of the value of NUMER over DENOM. */
  539. /* GCC may have built-ins for these someday. */
  540. extern div_t div (int __numer, int __denom)
  541. __THROW __attribute__ ((__const__));
  542. extern ldiv_t ldiv (long int __numer, long int __denom)
  543. __THROW __attribute__ ((__const__));
  544. __END_NAMESPACE_STD
  545. #ifdef __USE_ISOC99
  546. __BEGIN_NAMESPACE_C99
  547. __extension__ extern lldiv_t lldiv (long long int __numer,
  548. long long int __denom)
  549. __THROW __attribute__ ((__const__));
  550. __END_NAMESPACE_C99
  551. #endif
  552. #ifdef __UCLIBC_HAS_WCHAR__
  553. __BEGIN_NAMESPACE_STD
  554. /* Return the length of the multibyte character
  555. in S, which is no longer than N. */
  556. extern int mblen (__const char *__s, size_t __n) __THROW;
  557. /* Return the length of the given multibyte character,
  558. putting its `wchar_t' representation in *PWC. */
  559. extern int mbtowc (wchar_t *__restrict __pwc,
  560. __const char *__restrict __s, size_t __n) __THROW;
  561. /* Put the multibyte character represented
  562. by WCHAR in S, returning its length. */
  563. extern int wctomb (char *__s, wchar_t __wchar) __THROW;
  564. /* Convert a multibyte string to a wide char string. */
  565. extern size_t mbstowcs (wchar_t *__restrict __pwcs,
  566. __const char *__restrict __s, size_t __n) __THROW;
  567. /* Convert a wide char string to multibyte string. */
  568. extern size_t wcstombs (char *__restrict __s,
  569. __const wchar_t *__restrict __pwcs, size_t __n)
  570. __THROW;
  571. __END_NAMESPACE_STD
  572. #endif /* __UCLIBC_HAS_WCHAR__ */
  573. #ifdef __USE_SVID
  574. /* Determine whether the string value of RESPONSE matches the affirmation
  575. or negative response expression as specified by the LC_MESSAGES category
  576. in the program's current locale. Returns 1 if affirmative, 0 if
  577. negative, and -1 if not matching. */
  578. extern int rpmatch (__const char *__response) __THROW;
  579. #endif
  580. #ifdef __USE_XOPEN_EXTENDED
  581. /* Parse comma separated suboption from *OPTIONP and match against
  582. strings in TOKENS. If found return index and set *VALUEP to
  583. optional value introduced by an equal sign. If the suboption is
  584. not part of TOKENS return in *VALUEP beginning of unknown
  585. suboption. On exit *OPTIONP is set to the beginning of the next
  586. token or at the terminating NUL character. */
  587. extern int getsubopt (char **__restrict __optionp,
  588. char *__const *__restrict __tokens,
  589. char **__restrict __valuep) __THROW;
  590. #endif
  591. #ifdef __USE_XOPEN
  592. /* Setup DES tables according KEY. */
  593. extern void setkey (__const char *__key) __THROW;
  594. #endif
  595. /* X/Open pseudo terminal handling. */
  596. #ifdef __USE_XOPEN2K
  597. /* Return a master pseudo-terminal handle. */
  598. extern int posix_openpt (int __oflag) __THROW;
  599. #endif
  600. #ifdef __USE_XOPEN
  601. /* The next four functions all take a master pseudo-tty fd and
  602. perform an operation on the associated slave: */
  603. /* Chown the slave to the calling user. */
  604. extern int grantpt (int __fd) __THROW;
  605. /* Release an internal lock so the slave can be opened.
  606. Call after grantpt(). */
  607. extern int unlockpt (int __fd) __THROW;
  608. /* Return the pathname of the pseudo terminal slave assoicated with
  609. the master FD is open on, or NULL on errors.
  610. The returned storage is good until the next call to this function. */
  611. extern char *ptsname (int __fd) __THROW;
  612. #endif
  613. #ifdef __USE_GNU
  614. /* Store at most BUFLEN characters of the pathname of the slave pseudo
  615. terminal associated with the master FD is open on in BUF.
  616. Return 0 on success, otherwise an error number. */
  617. extern int ptsname_r (int __fd, char *__buf, size_t __buflen) __THROW;
  618. /* Open a master pseudo terminal and return its file descriptor. */
  619. extern int getpt (void) __THROW;
  620. #endif
  621. #endif /* don't just need malloc and calloc */
  622. #undef __need_malloc_and_calloc
  623. __END_DECLS
  624. #endif /* stdlib.h */