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  1. /* Copyright (C) 1991-2014 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, see
  16.    <http://www.gnu.org/licenses/>.  */
  17.  
  18. /*
  19.  *  ISO C99 Standard: 7.20 General utilities    <stdlib.h>
  20.  */
  21.  
  22. #ifndef _STDLIB_H
  23.  
  24. #include <features.h>
  25.  
  26. /* Get size_t, wchar_t and NULL from <stddef.h>.  */
  27. #define     __need_size_t
  28. #ifndef __need_malloc_and_calloc
  29. # define    __need_wchar_t
  30. # define    __need_NULL
  31. #endif
  32. #include <stddef.h>
  33.  
  34. __BEGIN_DECLS
  35.  
  36. #ifndef __need_malloc_and_calloc
  37. #define _STDLIB_H   1
  38.  
  39. #if (defined __USE_XOPEN || defined __USE_XOPEN2K8) && !defined _SYS_WAIT_H
  40. /* XPG requires a few symbols from <sys/wait.h> being defined.  */
  41. # include <bits/waitflags.h>
  42. # include <bits/waitstatus.h>
  43.  
  44. # ifdef __USE_MISC
  45.  
  46. /* Lots of hair to allow traditional BSD use of `union wait'
  47.    as well as POSIX.1 use of `int' for the status word.  */
  48.  
  49. #  if defined __GNUC__ && !defined __cplusplus
  50. #   define __WAIT_INT(status) \
  51.   (__extension__ (((union { __typeof(status) __in; int __i; }) \
  52.            { .__in = (status) }).__i))
  53. #  else
  54. #   define __WAIT_INT(status)   (*(int *) &(status))
  55. #  endif
  56.  
  57. /* This is the type of the argument to `wait'.  The funky union
  58.    causes redeclarations with either `int *' or `union wait *' to be
  59.    allowed without complaint.  __WAIT_STATUS_DEFN is the type used in
  60.    the actual function definitions.  */
  61.  
  62. #  if !defined __GNUC__ || __GNUC__ < 2 || defined __cplusplus
  63. #   define __WAIT_STATUS    void *
  64. #   define __WAIT_STATUS_DEFN   void *
  65. #  else
  66. /* This works in GCC 2.6.1 and later.  */
  67. typedef union
  68.   {
  69.     union wait *__uptr;
  70.     int *__iptr;
  71.   } __WAIT_STATUS __attribute__ ((__transparent_union__));
  72. #   define __WAIT_STATUS_DEFN   int *
  73. #  endif
  74.  
  75. # else /* Don't use misc.  */
  76.  
  77. #  define __WAIT_INT(status)    (status)
  78. #  define __WAIT_STATUS     int *
  79. #  define __WAIT_STATUS_DEFN    int *
  80.  
  81. # endif /* Use misc.  */
  82.  
  83. /* Define the macros <sys/wait.h> also would define this way.  */
  84. # define WEXITSTATUS(status)    __WEXITSTATUS (__WAIT_INT (status))
  85. # define WTERMSIG(status)   __WTERMSIG (__WAIT_INT (status))
  86. # define WSTOPSIG(status)   __WSTOPSIG (__WAIT_INT (status))
  87. # define WIFEXITED(status)  __WIFEXITED (__WAIT_INT (status))
  88. # define WIFSIGNALED(status)    __WIFSIGNALED (__WAIT_INT (status))
  89. # define WIFSTOPPED(status) __WIFSTOPPED (__WAIT_INT (status))
  90. # ifdef __WIFCONTINUED
  91. #  define WIFCONTINUED(status)  __WIFCONTINUED (__WAIT_INT (status))
  92. # endif
  93. #endif  /* X/Open or XPG7 and <sys/wait.h> not included.  */
  94.  
  95. __BEGIN_NAMESPACE_STD
  96. /* Returned by `div'.  */
  97. typedef struct
  98.   {
  99.     int quot;           /* Quotient.  */
  100.     int rem;            /* Remainder.  */
  101.   } div_t;
  102.  
  103. /* Returned by `ldiv'.  */
  104. #ifndef __ldiv_t_defined
  105. typedef struct
  106.   {
  107.     long int quot;      /* Quotient.  */
  108.     long int rem;       /* Remainder.  */
  109.   } ldiv_t;
  110. # define __ldiv_t_defined   1
  111. #endif
  112. __END_NAMESPACE_STD
  113.  
  114. #if defined __USE_ISOC99 && !defined __lldiv_t_defined
  115. __BEGIN_NAMESPACE_C99
  116. /* Returned by `lldiv'.  */
  117. __extension__ typedef struct
  118.   {
  119.     long long int quot;     /* Quotient.  */
  120.     long long int rem;      /* Remainder.  */
  121.   } lldiv_t;
  122. # define __lldiv_t_defined  1
  123. __END_NAMESPACE_C99
  124. #endif
  125.  
  126.  
  127. /* The largest number rand will return (same as INT_MAX).  */
  128. #define RAND_MAX    2147483647
  129.  
  130.  
  131. /* We define these the same for all machines.
  132.    Changes from this to the outside world should be done in `_exit'.  */
  133. #define EXIT_FAILURE    1   /* Failing exit status.  */
  134. #define EXIT_SUCCESS    0   /* Successful exit status.  */
  135.  
  136.  
  137. /* Maximum length of a multibyte character in the current locale.  */
  138. #define MB_CUR_MAX  (__ctype_get_mb_cur_max ())
  139. extern size_t __ctype_get_mb_cur_max (void) __THROW __wur;
  140.  
  141.  
  142. __BEGIN_NAMESPACE_STD
  143. /* Convert a string to a floating-point number.  */
  144. extern double atof (const char *__nptr)
  145.      __THROW __attribute_pure__ __nonnull ((1)) __wur;
  146. /* Convert a string to an integer.  */
  147. extern int atoi (const char *__nptr)
  148.      __THROW __attribute_pure__ __nonnull ((1)) __wur;
  149. /* Convert a string to a long integer.  */
  150. extern long int atol (const char *__nptr)
  151.      __THROW __attribute_pure__ __nonnull ((1)) __wur;
  152. __END_NAMESPACE_STD
  153.  
  154. #ifdef __USE_ISOC99
  155. __BEGIN_NAMESPACE_C99
  156. /* Convert a string to a long long integer.  */
  157. __extension__ extern long long int atoll (const char *__nptr)
  158.      __THROW __attribute_pure__ __nonnull ((1)) __wur;
  159. __END_NAMESPACE_C99
  160. #endif
  161.  
  162. __BEGIN_NAMESPACE_STD
  163. /* Convert a string to a floating-point number.  */
  164. extern double strtod (const char *__restrict __nptr,
  165.               char **__restrict __endptr)
  166.      __THROW __nonnull ((1));
  167. __END_NAMESPACE_STD
  168.  
  169. #ifdef  __USE_ISOC99
  170. __BEGIN_NAMESPACE_C99
  171. /* Likewise for `float' and `long double' sizes of floating-point numbers.  */
  172. extern float strtof (const char *__restrict __nptr,
  173.              char **__restrict __endptr) __THROW __nonnull ((1));
  174.  
  175. extern long double strtold (const char *__restrict __nptr,
  176.                 char **__restrict __endptr)
  177.      __THROW __nonnull ((1));
  178. __END_NAMESPACE_C99
  179. #endif
  180.  
  181. __BEGIN_NAMESPACE_STD
  182. /* Convert a string to a long integer.  */
  183. extern long int strtol (const char *__restrict __nptr,
  184.             char **__restrict __endptr, int __base)
  185.      __THROW __nonnull ((1));
  186. /* Convert a string to an unsigned long integer.  */
  187. extern unsigned long int strtoul (const char *__restrict __nptr,
  188.                   char **__restrict __endptr, int __base)
  189.      __THROW __nonnull ((1));
  190. __END_NAMESPACE_STD
  191.  
  192. #ifdef __USE_MISC
  193. /* Convert a string to a quadword integer.  */
  194. __extension__
  195. extern long long int strtoq (const char *__restrict __nptr,
  196.                  char **__restrict __endptr, int __base)
  197.      __THROW __nonnull ((1));
  198. /* Convert a string to an unsigned quadword integer.  */
  199. __extension__
  200. extern unsigned long long int strtouq (const char *__restrict __nptr,
  201.                        char **__restrict __endptr, int __base)
  202.      __THROW __nonnull ((1));
  203. #endif /* Use misc.  */
  204.  
  205. #ifdef __USE_ISOC99
  206. __BEGIN_NAMESPACE_C99
  207. /* Convert a string to a quadword integer.  */
  208. __extension__
  209. extern long long int strtoll (const char *__restrict __nptr,
  210.                   char **__restrict __endptr, int __base)
  211.      __THROW __nonnull ((1));
  212. /* Convert a string to an unsigned quadword integer.  */
  213. __extension__
  214. extern unsigned long long int strtoull (const char *__restrict __nptr,
  215.                     char **__restrict __endptr, int __base)
  216.      __THROW __nonnull ((1));
  217. __END_NAMESPACE_C99
  218. #endif /* ISO C99 or use MISC.  */
  219.  
  220.  
  221. #ifdef __USE_GNU
  222. /* The concept of one static locale per category is not very well
  223.    thought out.  Many applications will need to process its data using
  224.    information from several different locales.  Another problem is
  225.    the implementation of the internationalization handling in the
  226.    ISO C++ standard library.  To support this another set of
  227.    the functions using locale data exist which take an additional
  228.    argument.
  229.  
  230.    Attention: even though several *_l interfaces are part of POSIX:2008,
  231.    these are not.  */
  232.  
  233. /* Structure for reentrant locale using functions.  This is an
  234.    (almost) opaque type for the user level programs.  */
  235. # include <xlocale.h>
  236.  
  237. /* Special versions of the functions above which take the locale to
  238.    use as an additional parameter.  */
  239. extern long int strtol_l (const char *__restrict __nptr,
  240.               char **__restrict __endptr, int __base,
  241.               __locale_t __loc) __THROW __nonnull ((1, 4));
  242.  
  243. extern unsigned long int strtoul_l (const char *__restrict __nptr,
  244.                     char **__restrict __endptr,
  245.                     int __base, __locale_t __loc)
  246.      __THROW __nonnull ((1, 4));
  247.  
  248. __extension__
  249. extern long long int strtoll_l (const char *__restrict __nptr,
  250.                 char **__restrict __endptr, int __base,
  251.                 __locale_t __loc)
  252.      __THROW __nonnull ((1, 4));
  253.  
  254. __extension__
  255. extern unsigned long long int strtoull_l (const char *__restrict __nptr,
  256.                       char **__restrict __endptr,
  257.                       int __base, __locale_t __loc)
  258.      __THROW __nonnull ((1, 4));
  259.  
  260. extern double strtod_l (const char *__restrict __nptr,
  261.             char **__restrict __endptr, __locale_t __loc)
  262.      __THROW __nonnull ((1, 3));
  263.  
  264. extern float strtof_l (const char *__restrict __nptr,
  265.                char **__restrict __endptr, __locale_t __loc)
  266.      __THROW __nonnull ((1, 3));
  267.  
  268. extern long double strtold_l (const char *__restrict __nptr,
  269.                   char **__restrict __endptr,
  270.                   __locale_t __loc)
  271.      __THROW __nonnull ((1, 3));
  272. #endif /* GNU */
  273.  
  274.  
  275. #ifdef __USE_EXTERN_INLINES
  276. __BEGIN_NAMESPACE_STD
  277. __extern_inline int
  278. __NTH (atoi (const char *__nptr))
  279. {
  280.   return (int) strtol (__nptr, (char **) NULL, 10);
  281. }
  282. __extern_inline long int
  283. __NTH (atol (const char *__nptr))
  284. {
  285.   return strtol (__nptr, (char **) NULL, 10);
  286. }
  287. __END_NAMESPACE_STD
  288.  
  289. # ifdef __USE_ISOC99
  290. __BEGIN_NAMESPACE_C99
  291. __extension__ __extern_inline long long int
  292. __NTH (atoll (const char *__nptr))
  293. {
  294.   return strtoll (__nptr, (char **) NULL, 10);
  295. }
  296. __END_NAMESPACE_C99
  297. # endif
  298. #endif /* Optimizing and Inlining.  */
  299.  
  300.  
  301. #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
  302. /* Convert N to base 64 using the digits "./0-9A-Za-z", least-significant
  303.    digit first.  Returns a pointer to static storage overwritten by the
  304.    next call.  */
  305. extern char *l64a (long int __n) __THROW __wur;
  306.  
  307. /* Read a number from a string S in base 64 as above.  */
  308. extern long int a64l (const char *__s)
  309.      __THROW __attribute_pure__ __nonnull ((1)) __wur;
  310.  
  311. #endif  /* Use misc || extended X/Open.  */
  312.  
  313. #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
  314. # include <sys/types.h> /* we need int32_t... */
  315.  
  316. /* These are the functions that actually do things.  The `random', `srandom',
  317.    `initstate' and `setstate' functions are those from BSD Unices.
  318.    The `rand' and `srand' functions are required by the ANSI standard.
  319.    We provide both interfaces to the same random number generator.  */
  320. /* Return a random long integer between 0 and RAND_MAX inclusive.  */
  321. extern long int random (void) __THROW;
  322.  
  323. /* Seed the random number generator with the given number.  */
  324. extern void srandom (unsigned int __seed) __THROW;
  325.  
  326. /* Initialize the random number generator to use state buffer STATEBUF,
  327.    of length STATELEN, and seed it with SEED.  Optimal lengths are 8, 16,
  328.    32, 64, 128 and 256, the bigger the better; values less than 8 will
  329.    cause an error and values greater than 256 will be rounded down.  */
  330. extern char *initstate (unsigned int __seed, char *__statebuf,
  331.             size_t __statelen) __THROW __nonnull ((2));
  332.  
  333. /* Switch the random number generator to state buffer STATEBUF,
  334.    which should have been previously initialized by `initstate'.  */
  335. extern char *setstate (char *__statebuf) __THROW __nonnull ((1));
  336.  
  337.  
  338. # ifdef __USE_MISC
  339. /* Reentrant versions of the `random' family of functions.
  340.    These functions all use the following data structure to contain
  341.    state, rather than global state variables.  */
  342.  
  343. struct random_data
  344.   {
  345.     int32_t *fptr;      /* Front pointer.  */
  346.     int32_t *rptr;      /* Rear pointer.  */
  347.     int32_t *state;     /* Array of state values.  */
  348.     int rand_type;      /* Type of random number generator.  */
  349.     int rand_deg;       /* Degree of random number generator.  */
  350.     int rand_sep;       /* Distance between front and rear.  */
  351.     int32_t *end_ptr;       /* Pointer behind state table.  */
  352.   };
  353.  
  354. extern int random_r (struct random_data *__restrict __buf,
  355.              int32_t *__restrict __result) __THROW __nonnull ((1, 2));
  356.  
  357. extern int srandom_r (unsigned int __seed, struct random_data *__buf)
  358.      __THROW __nonnull ((2));
  359.  
  360. extern int initstate_r (unsigned int __seed, char *__restrict __statebuf,
  361.             size_t __statelen,
  362.             struct random_data *__restrict __buf)
  363.      __THROW __nonnull ((2, 4));
  364.  
  365. extern int setstate_r (char *__restrict __statebuf,
  366.                struct random_data *__restrict __buf)
  367.      __THROW __nonnull ((1, 2));
  368. # endif /* Use misc.  */
  369. #endif  /* Use extended X/Open || misc. */
  370.  
  371.  
  372. __BEGIN_NAMESPACE_STD
  373. /* Return a random integer between 0 and RAND_MAX inclusive.  */
  374. extern int rand (void) __THROW;
  375. /* Seed the random number generator with the given number.  */
  376. extern void srand (unsigned int __seed) __THROW;
  377. __END_NAMESPACE_STD
  378.  
  379. #ifdef __USE_POSIX
  380. /* Reentrant interface according to POSIX.1.  */
  381. extern int rand_r (unsigned int *__seed) __THROW;
  382. #endif
  383.  
  384.  
  385. #if defined __USE_MISC || defined __USE_XOPEN
  386. /* System V style 48-bit random number generator functions.  */
  387.  
  388. /* Return non-negative, double-precision floating-point value in [0.0,1.0).  */
  389. extern double drand48 (void) __THROW;
  390. extern double erand48 (unsigned short int __xsubi[3]) __THROW __nonnull ((1));
  391.  
  392. /* Return non-negative, long integer in [0,2^31).  */
  393. extern long int lrand48 (void) __THROW;
  394. extern long int nrand48 (unsigned short int __xsubi[3])
  395.      __THROW __nonnull ((1));
  396.  
  397. /* Return signed, long integers in [-2^31,2^31).  */
  398. extern long int mrand48 (void) __THROW;
  399. extern long int jrand48 (unsigned short int __xsubi[3])
  400.      __THROW __nonnull ((1));
  401.  
  402. /* Seed random number generator.  */
  403. extern void srand48 (long int __seedval) __THROW;
  404. extern unsigned short int *seed48 (unsigned short int __seed16v[3])
  405.      __THROW __nonnull ((1));
  406. extern void lcong48 (unsigned short int __param[7]) __THROW __nonnull ((1));
  407.  
  408. # ifdef __USE_MISC
  409. /* Data structure for communication with thread safe versions.  This
  410.    type is to be regarded as opaque.  It's only exported because users
  411.    have to allocate objects of this type.  */
  412. struct drand48_data
  413.   {
  414.     unsigned short int __x[3];  /* Current state.  */
  415.     unsigned short int __old_x[3]; /* Old state.  */
  416.     unsigned short int __c; /* Additive const. in congruential formula.  */
  417.     unsigned short int __init;  /* Flag for initializing.  */
  418.     __extension__ unsigned long long int __a;   /* Factor in congruential
  419.                            formula.  */
  420.   };
  421.  
  422. /* Return non-negative, double-precision floating-point value in [0.0,1.0).  */
  423. extern int drand48_r (struct drand48_data *__restrict __buffer,
  424.               double *__restrict __result) __THROW __nonnull ((1, 2));
  425. extern int erand48_r (unsigned short int __xsubi[3],
  426.               struct drand48_data *__restrict __buffer,
  427.               double *__restrict __result) __THROW __nonnull ((1, 2));
  428.  
  429. /* Return non-negative, long integer in [0,2^31).  */
  430. extern int lrand48_r (struct drand48_data *__restrict __buffer,
  431.               long int *__restrict __result)
  432.      __THROW __nonnull ((1, 2));
  433. extern int nrand48_r (unsigned short int __xsubi[3],
  434.               struct drand48_data *__restrict __buffer,
  435.               long int *__restrict __result)
  436.      __THROW __nonnull ((1, 2));
  437.  
  438. /* Return signed, long integers in [-2^31,2^31).  */
  439. extern int mrand48_r (struct drand48_data *__restrict __buffer,
  440.               long int *__restrict __result)
  441.      __THROW __nonnull ((1, 2));
  442. extern int jrand48_r (unsigned short int __xsubi[3],
  443.               struct drand48_data *__restrict __buffer,
  444.               long int *__restrict __result)
  445.      __THROW __nonnull ((1, 2));
  446.  
  447. /* Seed random number generator.  */
  448. extern int srand48_r (long int __seedval, struct drand48_data *__buffer)
  449.      __THROW __nonnull ((2));
  450.  
  451. extern int seed48_r (unsigned short int __seed16v[3],
  452.              struct drand48_data *__buffer) __THROW __nonnull ((1, 2));
  453.  
  454. extern int lcong48_r (unsigned short int __param[7],
  455.               struct drand48_data *__buffer)
  456.      __THROW __nonnull ((1, 2));
  457. # endif /* Use misc.  */
  458. #endif  /* Use misc or X/Open.  */
  459.  
  460. #endif /* don't just need malloc and calloc */
  461.  
  462. #ifndef __malloc_and_calloc_defined
  463. # define __malloc_and_calloc_defined
  464. __BEGIN_NAMESPACE_STD
  465. /* Allocate SIZE bytes of memory.  */
  466. extern void *malloc (size_t __size) __THROW __attribute_malloc__ __wur;
  467. /* Allocate NMEMB elements of SIZE bytes each, all initialized to 0.  */
  468. extern void *calloc (size_t __nmemb, size_t __size)
  469.      __THROW __attribute_malloc__ __wur;
  470. __END_NAMESPACE_STD
  471. #endif
  472.  
  473. #ifndef __need_malloc_and_calloc
  474. __BEGIN_NAMESPACE_STD
  475. /* Re-allocate the previously allocated block
  476.    in PTR, making the new block SIZE bytes long.  */
  477. /* __attribute_malloc__ is not used, because if realloc returns
  478.    the same pointer that was passed to it, aliasing needs to be allowed
  479.    between objects pointed by the old and new pointers.  */
  480. extern void *realloc (void *__ptr, size_t __size)
  481.      __THROW __attribute_warn_unused_result__;
  482. /* Free a block allocated by `malloc', `realloc' or `calloc'.  */
  483. extern void free (void *__ptr) __THROW;
  484. __END_NAMESPACE_STD
  485.  
  486. #ifdef  __USE_MISC
  487. /* Free a block.  An alias for `free'.  (Sun Unices).  */
  488. extern void cfree (void *__ptr) __THROW;
  489. #endif /* Use misc.  */
  490.  
  491. #ifdef __USE_MISC
  492. # include <alloca.h>
  493. #endif /* Use misc.  */
  494.  
  495. #if (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K) \
  496.     || defined __USE_MISC
  497. /* Allocate SIZE bytes on a page boundary.  The storage cannot be freed.  */
  498. extern void *valloc (size_t __size) __THROW __attribute_malloc__ __wur;
  499. #endif
  500.  
  501. #ifdef __USE_XOPEN2K
  502. /* Allocate memory of SIZE bytes with an alignment of ALIGNMENT.  */
  503. extern int posix_memalign (void **__memptr, size_t __alignment, size_t __size)
  504.      __THROW __nonnull ((1)) __wur;
  505. #endif
  506.  
  507. #ifdef __USE_ISOC11
  508. /* ISO C variant of aligned allocation.  */
  509. extern void *aligned_alloc (size_t __alignment, size_t __size)
  510.      __THROW __attribute_malloc__ __attribute_alloc_size__ ((2)) __wur;
  511. #endif
  512.  
  513. __BEGIN_NAMESPACE_STD
  514. /* Abort execution and generate a core-dump.  */
  515. extern void abort (void) __THROW __attribute__ ((__noreturn__));
  516.  
  517.  
  518. /* Register a function to be called when `exit' is called.  */
  519. extern int atexit (void (*__func) (void)) __THROW __nonnull ((1));
  520.  
  521. #if defined __USE_ISOC11 || defined __USE_ISOCXX11
  522. /* Register a function to be called when `quick_exit' is called.  */
  523. # ifdef __cplusplus
  524. extern "C++" int at_quick_exit (void (*__func) (void))
  525.      __THROW __asm ("at_quick_exit") __nonnull ((1));
  526. # else
  527. extern int at_quick_exit (void (*__func) (void)) __THROW __nonnull ((1));
  528. # endif
  529. #endif
  530. __END_NAMESPACE_STD
  531.  
  532. #ifdef  __USE_MISC
  533. /* Register a function to be called with the status
  534.    given to `exit' and the given argument.  */
  535. extern int on_exit (void (*__func) (int __status, void *__arg), void *__arg)
  536.      __THROW __nonnull ((1));
  537. #endif
  538.  
  539. __BEGIN_NAMESPACE_STD
  540. /* Call all functions registered with `atexit' and `on_exit',
  541.    in the reverse of the order in which they were registered,
  542.    perform stdio cleanup, and terminate program execution with STATUS.  */
  543. extern void exit (int __status) __THROW __attribute__ ((__noreturn__));
  544.  
  545. #if defined __USE_ISOC11 || defined __USE_ISOCXX11
  546. /* Call all functions registered with `at_quick_exit' in the reverse
  547.    of the order in which they were registered and terminate program
  548.    execution with STATUS.  */
  549. extern void quick_exit (int __status) __THROW __attribute__ ((__noreturn__));
  550. #endif
  551. __END_NAMESPACE_STD
  552.  
  553. #ifdef __USE_ISOC99
  554. __BEGIN_NAMESPACE_C99
  555. /* Terminate the program with STATUS without calling any of the
  556.    functions registered with `atexit' or `on_exit'.  */
  557. extern void _Exit (int __status) __THROW __attribute__ ((__noreturn__));
  558. __END_NAMESPACE_C99
  559. #endif
  560.  
  561.  
  562. __BEGIN_NAMESPACE_STD
  563. /* Return the value of envariable NAME, or NULL if it doesn't exist.  */
  564. extern char *getenv (const char *__name) __THROW __nonnull ((1)) __wur;
  565. __END_NAMESPACE_STD
  566.  
  567. #ifdef __USE_GNU
  568. /* This function is similar to the above but returns NULL if the
  569.    programs is running with SUID or SGID enabled.  */
  570. extern char *secure_getenv (const char *__name)
  571.      __THROW __nonnull ((1)) __wur;
  572. #endif
  573.  
  574. #if defined __USE_MISC || defined __USE_XOPEN
  575. /* The SVID says this is in <stdio.h>, but this seems a better place.   */
  576. /* Put STRING, which is of the form "NAME=VALUE", in the environment.
  577.    If there is no `=', remove NAME from the environment.  */
  578. extern int putenv (char *__string) __THROW __nonnull ((1));
  579. #endif
  580.  
  581. #ifdef __USE_XOPEN2K
  582. /* Set NAME to VALUE in the environment.
  583.    If REPLACE is nonzero, overwrite an existing value.  */
  584. extern int setenv (const char *__name, const char *__value, int __replace)
  585.      __THROW __nonnull ((2));
  586.  
  587. /* Remove the variable NAME from the environment.  */
  588. extern int unsetenv (const char *__name) __THROW __nonnull ((1));
  589. #endif
  590.  
  591. #ifdef  __USE_MISC
  592. /* The `clearenv' was planned to be added to POSIX.1 but probably
  593.    never made it.  Nevertheless the POSIX.9 standard (POSIX bindings
  594.    for Fortran 77) requires this function.  */
  595. extern int clearenv (void) __THROW;
  596. #endif
  597.  
  598.  
  599. #if defined __USE_MISC \
  600.     || (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K8)
  601. /* Generate a unique temporary file name from TEMPLATE.
  602.    The last six characters of TEMPLATE must be "XXXXXX";
  603.    they are replaced with a string that makes the file name unique.
  604.    Always returns TEMPLATE, it's either a temporary file name or a null
  605.    string if it cannot get a unique file name.  */
  606. extern char *mktemp (char *__template) __THROW __nonnull ((1));
  607. #endif
  608.  
  609. #if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
  610. /* Generate a unique temporary file name from TEMPLATE.
  611.    The last six characters of TEMPLATE must be "XXXXXX";
  612.    they are replaced with a string that makes the filename unique.
  613.    Returns a file descriptor open on the file for reading and writing,
  614.    or -1 if it cannot create a uniquely-named file.
  615.  
  616.    This function is a possible cancellation point and therefore not
  617.    marked with __THROW.  */
  618. # ifndef __USE_FILE_OFFSET64
  619. extern int mkstemp (char *__template) __nonnull ((1)) __wur;
  620. # else
  621. #  ifdef __REDIRECT
  622. extern int __REDIRECT (mkstemp, (char *__template), mkstemp64)
  623.      __nonnull ((1)) __wur;
  624. #  else
  625. #   define mkstemp mkstemp64
  626. #  endif
  627. # endif
  628. # ifdef __USE_LARGEFILE64
  629. extern int mkstemp64 (char *__template) __nonnull ((1)) __wur;
  630. # endif
  631. #endif
  632.  
  633. #ifdef __USE_MISC
  634. /* Similar to mkstemp, but the template can have a suffix after the
  635.    XXXXXX.  The length of the suffix is specified in the second
  636.    parameter.
  637.  
  638.    This function is a possible cancellation point and therefore not
  639.    marked with __THROW.  */
  640. # ifndef __USE_FILE_OFFSET64
  641. extern int mkstemps (char *__template, int __suffixlen) __nonnull ((1)) __wur;
  642. # else
  643. #  ifdef __REDIRECT
  644. extern int __REDIRECT (mkstemps, (char *__template, int __suffixlen),
  645.                mkstemps64) __nonnull ((1)) __wur;
  646. #  else
  647. #   define mkstemps mkstemps64
  648. #  endif
  649. # endif
  650. # ifdef __USE_LARGEFILE64
  651. extern int mkstemps64 (char *__template, int __suffixlen)
  652.      __nonnull ((1)) __wur;
  653. # endif
  654. #endif
  655.  
  656. #ifdef __USE_XOPEN2K8
  657. /* Create a unique temporary directory from TEMPLATE.
  658.    The last six characters of TEMPLATE must be "XXXXXX";
  659.    they are replaced with a string that makes the directory name unique.
  660.    Returns TEMPLATE, or a null pointer if it cannot get a unique name.
  661.    The directory is created mode 700.  */
  662. extern char *mkdtemp (char *__template) __THROW __nonnull ((1)) __wur;
  663. #endif
  664.  
  665. #ifdef __USE_GNU
  666. /* Generate a unique temporary file name from TEMPLATE similar to
  667.    mkstemp.  But allow the caller to pass additional flags which are
  668.    used in the open call to create the file..
  669.  
  670.    This function is a possible cancellation point and therefore not
  671.    marked with __THROW.  */
  672. # ifndef __USE_FILE_OFFSET64
  673. extern int mkostemp (char *__template, int __flags) __nonnull ((1)) __wur;
  674. # else
  675. #  ifdef __REDIRECT
  676. extern int __REDIRECT (mkostemp, (char *__template, int __flags), mkostemp64)
  677.      __nonnull ((1)) __wur;
  678. #  else
  679. #   define mkostemp mkostemp64
  680. #  endif
  681. # endif
  682. # ifdef __USE_LARGEFILE64
  683. extern int mkostemp64 (char *__template, int __flags) __nonnull ((1)) __wur;
  684. # endif
  685.  
  686. /* Similar to mkostemp, but the template can have a suffix after the
  687.    XXXXXX.  The length of the suffix is specified in the second
  688.    parameter.
  689.  
  690.    This function is a possible cancellation point and therefore not
  691.    marked with __THROW.  */
  692. # ifndef __USE_FILE_OFFSET64
  693. extern int mkostemps (char *__template, int __suffixlen, int __flags)
  694.      __nonnull ((1)) __wur;
  695. # else
  696. #  ifdef __REDIRECT
  697. extern int __REDIRECT (mkostemps, (char *__template, int __suffixlen,
  698.                    int __flags), mkostemps64)
  699.      __nonnull ((1)) __wur;
  700. #  else
  701. #   define mkostemps mkostemps64
  702. #  endif
  703. # endif
  704. # ifdef __USE_LARGEFILE64
  705. extern int mkostemps64 (char *__template, int __suffixlen, int __flags)
  706.      __nonnull ((1)) __wur;
  707. # endif
  708. #endif
  709.  
  710.  
  711. __BEGIN_NAMESPACE_STD
  712. /* Execute the given line as a shell command.
  713.  
  714.    This function is a cancellation point and therefore not marked with
  715.    __THROW.  */
  716. extern int system (const char *__command) __wur;
  717. __END_NAMESPACE_STD
  718.  
  719.  
  720. #ifdef  __USE_GNU
  721. /* Return a malloc'd string containing the canonical absolute name of the
  722.    existing named file.  */
  723. extern char *canonicalize_file_name (const char *__name)
  724.      __THROW __nonnull ((1)) __wur;
  725. #endif
  726.  
  727. #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
  728. /* Return the canonical absolute name of file NAME.  If RESOLVED is
  729.    null, the result is malloc'd; otherwise, if the canonical name is
  730.    PATH_MAX chars or more, returns null with `errno' set to
  731.    ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars,
  732.    returns the name in RESOLVED.  */
  733. extern char *realpath (const char *__restrict __name,
  734.                char *__restrict __resolved) __THROW __wur;
  735. #endif
  736.  
  737.  
  738. /* Shorthand for type of comparison functions.  */
  739. #ifndef __COMPAR_FN_T
  740. # define __COMPAR_FN_T
  741. typedef int (*__compar_fn_t) (const void *, const void *);
  742.  
  743. # ifdef __USE_GNU
  744. typedef __compar_fn_t comparison_fn_t;
  745. # endif
  746. #endif
  747. #ifdef __USE_GNU
  748. typedef int (*__compar_d_fn_t) (const void *, const void *, void *);
  749. #endif
  750.  
  751. __BEGIN_NAMESPACE_STD
  752. /* Do a binary search for KEY in BASE, which consists of NMEMB elements
  753.    of SIZE bytes each, using COMPAR to perform the comparisons.  */
  754. extern void *bsearch (const void *__key, const void *__base,
  755.               size_t __nmemb, size_t __size, __compar_fn_t __compar)
  756.      __nonnull ((1, 2, 5)) __wur;
  757.  
  758. #ifdef __USE_EXTERN_INLINES
  759. # include <bits/stdlib-bsearch.h>
  760. #endif
  761.  
  762. /* Sort NMEMB elements of BASE, of SIZE bytes each,
  763.    using COMPAR to perform the comparisons.  */
  764. extern void qsort (void *__base, size_t __nmemb, size_t __size,
  765.            __compar_fn_t __compar) __nonnull ((1, 4));
  766. #ifdef __USE_GNU
  767. extern void qsort_r (void *__base, size_t __nmemb, size_t __size,
  768.              __compar_d_fn_t __compar, void *__arg)
  769.   __nonnull ((1, 4));
  770. #endif
  771.  
  772.  
  773. /* Return the absolute value of X.  */
  774. extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur;
  775. extern long int labs (long int __x) __THROW __attribute__ ((__const__)) __wur;
  776. __END_NAMESPACE_STD
  777.  
  778. #ifdef __USE_ISOC99
  779. __extension__ extern long long int llabs (long long int __x)
  780.      __THROW __attribute__ ((__const__)) __wur;
  781. #endif
  782.  
  783.  
  784. __BEGIN_NAMESPACE_STD
  785. /* Return the `div_t', `ldiv_t' or `lldiv_t' representation
  786.    of the value of NUMER over DENOM. */
  787. /* GCC may have built-ins for these someday.  */
  788. extern div_t div (int __numer, int __denom)
  789.      __THROW __attribute__ ((__const__)) __wur;
  790. extern ldiv_t ldiv (long int __numer, long int __denom)
  791.      __THROW __attribute__ ((__const__)) __wur;
  792. __END_NAMESPACE_STD
  793.  
  794. #ifdef __USE_ISOC99
  795. __BEGIN_NAMESPACE_C99
  796. __extension__ extern lldiv_t lldiv (long long int __numer,
  797.                     long long int __denom)
  798.      __THROW __attribute__ ((__const__)) __wur;
  799. __END_NAMESPACE_C99
  800. #endif
  801.  
  802.  
  803. #if (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K8) \
  804.     || defined __USE_MISC
  805. /* Convert floating point numbers to strings.  The returned values are
  806.    valid only until another call to the same function.  */
  807.  
  808. /* Convert VALUE to a string with NDIGIT digits and return a pointer to
  809.    this.  Set *DECPT with the position of the decimal character and *SIGN
  810.    with the sign of the number.  */
  811. extern char *ecvt (double __value, int __ndigit, int *__restrict __decpt,
  812.            int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur;
  813.  
  814. /* Convert VALUE to a string rounded to NDIGIT decimal digits.  Set *DECPT
  815.    with the position of the decimal character and *SIGN with the sign of
  816.    the number.  */
  817. extern char *fcvt (double __value, int __ndigit, int *__restrict __decpt,
  818.            int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur;
  819.  
  820. /* If possible convert VALUE to a string with NDIGIT significant digits.
  821.    Otherwise use exponential representation.  The resulting string will
  822.    be written to BUF.  */
  823. extern char *gcvt (double __value, int __ndigit, char *__buf)
  824.      __THROW __nonnull ((3)) __wur;
  825. #endif
  826.  
  827. #ifdef __USE_MISC
  828. /* Long double versions of above functions.  */
  829. extern char *qecvt (long double __value, int __ndigit,
  830.             int *__restrict __decpt, int *__restrict __sign)
  831.      __THROW __nonnull ((3, 4)) __wur;
  832. extern char *qfcvt (long double __value, int __ndigit,
  833.             int *__restrict __decpt, int *__restrict __sign)
  834.      __THROW __nonnull ((3, 4)) __wur;
  835. extern char *qgcvt (long double __value, int __ndigit, char *__buf)
  836.      __THROW __nonnull ((3)) __wur;
  837.  
  838.  
  839. /* Reentrant version of the functions above which provide their own
  840.    buffers.  */
  841. extern int ecvt_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. extern int fcvt_r (double __value, int __ndigit, int *__restrict __decpt,
  845.            int *__restrict __sign, char *__restrict __buf,
  846.            size_t __len) __THROW __nonnull ((3, 4, 5));
  847.  
  848. extern int qecvt_r (long double __value, int __ndigit,
  849.             int *__restrict __decpt, int *__restrict __sign,
  850.             char *__restrict __buf, size_t __len)
  851.      __THROW __nonnull ((3, 4, 5));
  852. extern int qfcvt_r (long double __value, int __ndigit,
  853.             int *__restrict __decpt, int *__restrict __sign,
  854.             char *__restrict __buf, size_t __len)
  855.      __THROW __nonnull ((3, 4, 5));
  856. #endif  /* misc */
  857.  
  858.  
  859. __BEGIN_NAMESPACE_STD
  860. /* Return the length of the multibyte character
  861.    in S, which is no longer than N.  */
  862. extern int mblen (const char *__s, size_t __n) __THROW;
  863. /* Return the length of the given multibyte character,
  864.    putting its `wchar_t' representation in *PWC.  */
  865. extern int mbtowc (wchar_t *__restrict __pwc,
  866.            const char *__restrict __s, size_t __n) __THROW;
  867. /* Put the multibyte character represented
  868.    by WCHAR in S, returning its length.  */
  869. extern int wctomb (char *__s, wchar_t __wchar) __THROW;
  870.  
  871.  
  872. /* Convert a multibyte string to a wide char string.  */
  873. extern size_t mbstowcs (wchar_t *__restrict  __pwcs,
  874.             const char *__restrict __s, size_t __n) __THROW;
  875. /* Convert a wide char string to multibyte string.  */
  876. extern size_t wcstombs (char *__restrict __s,
  877.             const wchar_t *__restrict __pwcs, size_t __n)
  878.      __THROW;
  879. __END_NAMESPACE_STD
  880.  
  881.  
  882. #ifdef __USE_MISC
  883. /* Determine whether the string value of RESPONSE matches the affirmation
  884.    or negative response expression as specified by the LC_MESSAGES category
  885.    in the program's current locale.  Returns 1 if affirmative, 0 if
  886.    negative, and -1 if not matching.  */
  887. extern int rpmatch (const char *__response) __THROW __nonnull ((1)) __wur;
  888. #endif
  889.  
  890.  
  891. #if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
  892. /* Parse comma separated suboption from *OPTIONP and match against
  893.    strings in TOKENS.  If found return index and set *VALUEP to
  894.    optional value introduced by an equal sign.  If the suboption is
  895.    not part of TOKENS return in *VALUEP beginning of unknown
  896.    suboption.  On exit *OPTIONP is set to the beginning of the next
  897.    token or at the terminating NUL character.  */
  898. extern int getsubopt (char **__restrict __optionp,
  899.               char *const *__restrict __tokens,
  900.               char **__restrict __valuep)
  901.      __THROW __nonnull ((1, 2, 3)) __wur;
  902. #endif
  903.  
  904.  
  905. #ifdef __USE_XOPEN
  906. /* Setup DES tables according KEY.  */
  907. extern void setkey (const char *__key) __THROW __nonnull ((1));
  908. #endif
  909.  
  910.  
  911. /* X/Open pseudo terminal handling.  */
  912.  
  913. #ifdef __USE_XOPEN2KXSI
  914. /* Return a master pseudo-terminal handle.  */
  915. extern int posix_openpt (int __oflag) __wur;
  916. #endif
  917.  
  918. #ifdef __USE_XOPEN
  919. /* The next four functions all take a master pseudo-tty fd and
  920.    perform an operation on the associated slave:  */
  921.  
  922. /* Chown the slave to the calling user.  */
  923. extern int grantpt (int __fd) __THROW;
  924.  
  925. /* Release an internal lock so the slave can be opened.
  926.    Call after grantpt().  */
  927. extern int unlockpt (int __fd) __THROW;
  928.  
  929. /* Return the pathname of the pseudo terminal slave associated with
  930.    the master FD is open on, or NULL on errors.
  931.    The returned storage is good until the next call to this function.  */
  932. extern char *ptsname (int __fd) __THROW __wur;
  933. #endif
  934.  
  935. #ifdef __USE_GNU
  936. /* Store at most BUFLEN characters of the pathname of the slave pseudo
  937.    terminal associated with the master FD is open on in BUF.
  938.    Return 0 on success, otherwise an error number.  */
  939. extern int ptsname_r (int __fd, char *__buf, size_t __buflen)
  940.      __THROW __nonnull ((2));
  941.  
  942. /* Open a master pseudo terminal and return its file descriptor.  */
  943. extern int getpt (void);
  944. #endif
  945.  
  946. #ifdef __USE_MISC
  947. /* Put the 1 minute, 5 minute and 15 minute load averages into the first
  948.    NELEM elements of LOADAVG.  Return the number written (never more than
  949.    three, but may be less than NELEM), or -1 if an error occurred.  */
  950. extern int getloadavg (double __loadavg[], int __nelem)
  951.      __THROW __nonnull ((1));
  952. #endif
  953.  
  954. #include <bits/stdlib-float.h>
  955.  
  956. /* Define some macros helping to catch buffer overflows.  */
  957. #if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function
  958. # include <bits/stdlib.h>
  959. #endif
  960. #ifdef __LDBL_COMPAT
  961. # include <bits/stdlib-ldbl.h>
  962. #endif
  963.  
  964. #endif /* don't just need malloc and calloc */
  965. #undef __need_malloc_and_calloc
  966.  
  967. __END_DECLS
  968.  
  969. #
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