include/stdlib.h

   1 /* Copyright (C) 1991-2007, 2009 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 # ifdef __UCLIBC_HAS_WCHAR__
  30 #  define       __need_wchar_t
  31 # endif
  32 # define        __need_NULL
  33 #endif
  34 #include <stddef.h>
  35
  36 __BEGIN_DECLS
  37
  38 #ifndef __need_malloc_and_calloc
  39 #define _STDLIB_H       1
  40
  41 #if (defined __USE_XOPEN || defined __USE_XOPEN2K8) && !defined _SYS_WAIT_H
  42 /* XPG requires a few symbols from <sys/wait.h> being defined.  */
  43 # include <bits/waitflags.h>
  44 # include <bits/waitstatus.h>
  45
  46 # ifdef __USE_BSD
  47
  48 /* Lots of hair to allow traditional BSD use of `union wait'
  49    as well as POSIX.1 use of `int' for the status word.  */
  50
  51 #  if defined __GNUC__ && !defined __cplusplus
  52 #   define __WAIT_INT(status) \
  53   (__extension__ (((union { __typeof(status) __in; int __i; }) \
  54                    { .__in = (status) }).__i))
  55 #  else
  56 #   define __WAIT_INT(status)   (*(int *) &(status))
  57 #  endif
  58
  59 /* This is the type of the argument to `wait'.  The funky union
  60    causes redeclarations with either `int *' or `union wait *' to be
  61    allowed without complaint.  __WAIT_STATUS_DEFN is the type used in
  62    the actual function definitions.  */
  63
  64 #  if !defined __GNUC__ || __GNUC__ < 2 || defined __cplusplus
  65 #   define __WAIT_STATUS        void *
  66 #   define __WAIT_STATUS_DEFN   void *
  67 #  else
  68 /* This works in GCC 2.6.1 and later.  */
  69 typedef union
  70   {
  71     union wait *__uptr;
  72     int *__iptr;
  73   } __WAIT_STATUS __attribute__ ((__transparent_union__));
  74 #   define __WAIT_STATUS_DEFN   int *
  75 #  endif
  76
  77 # else /* Don't use BSD.  */
  78
  79 #  define __WAIT_INT(status)    (status)
  80 #  define __WAIT_STATUS         int *
  81 #  define __WAIT_STATUS_DEFN    int *
  82
  83 # endif /* Use BSD.  */
  84
  85 /* Define the macros <sys/wait.h> also would define this way.  */
  86 # define WEXITSTATUS(status)    __WEXITSTATUS (__WAIT_INT (status))
  87 # define WTERMSIG(status)       __WTERMSIG (__WAIT_INT (status))
  88 # define WSTOPSIG(status)       __WSTOPSIG (__WAIT_INT (status))
  89 # define WIFEXITED(status)      __WIFEXITED (__WAIT_INT (status))
  90 # define WIFSIGNALED(status)    __WIFSIGNALED (__WAIT_INT (status))
  91 # define WIFSTOPPED(status)     __WIFSTOPPED (__WAIT_INT (status))
  92 # ifdef __WIFCONTINUED
  93 #  define WIFCONTINUED(status)  __WIFCONTINUED (__WAIT_INT (status))
  94 # endif
  95 #endif  /* X/Open and <sys/wait.h> not included.  */
  96
  97 __BEGIN_NAMESPACE_STD
  98 /* Returned by `div'.  */
  99 typedef struct
 100   {
 101     int quot;                   /* Quotient.  */
 102     int rem;                    /* Remainder.  */
 103   } div_t;
 104
 105 /* Returned by `ldiv'.  */
 106 #ifndef __ldiv_t_defined
 107 typedef struct
 108   {
 109     long int quot;              /* Quotient.  */
 110     long int rem;               /* Remainder.  */
 111   } ldiv_t;
 112 # define __ldiv_t_defined       1
 113 #endif
 114 __END_NAMESPACE_STD
 115
 116 #if defined __USE_ISOC99 && !defined __lldiv_t_defined
 117 __BEGIN_NAMESPACE_C99
 118 /* Returned by `lldiv'.  */
 119 __extension__ typedef struct
 120   {
 121     long long int quot;         /* Quotient.  */
 122     long long int rem;          /* Remainder.  */
 123   } lldiv_t;
 124 # define __lldiv_t_defined      1
 125 __END_NAMESPACE_C99
 126 #endif
 127
 128
 129 /* The largest number rand will return (same as INT_MAX).  */
 130 #define RAND_MAX        2147483647
 131
 132
 133 /* We define these the same for all machines.
 134    Changes from this to the outside world should be done in `_exit'.  */
 135 #define EXIT_FAILURE    1       /* Failing exit status.  */
 136 #define EXIT_SUCCESS    0       /* Successful exit status.  */
 137
 138
 139 /* Maximum length of a multibyte character in the current locale.  */
 140 #if 0
 141 #define MB_CUR_MAX      (__ctype_get_mb_cur_max ())
 142 extern size_t __ctype_get_mb_cur_max (void) __THROW __wur;
 143 #else
 144 #ifdef __UCLIBC_HAS_WCHAR__
 145 # define        MB_CUR_MAX      (_stdlib_mb_cur_max ())
 146 extern size_t _stdlib_mb_cur_max (void) __THROW __wur;
 147 libc_hidden_proto(_stdlib_mb_cur_max)
 148 #else
 149 # define        MB_CUR_MAX      1
 150 #endif
 151 #endif
 152
 153
 154 __BEGIN_NAMESPACE_STD
 155 #ifdef __UCLIBC_HAS_FLOATS__
 156 /* Convert a string to a floating-point number.  */
 157 extern double atof (const char *__nptr)
 158      __THROW __attribute_pure__ __nonnull ((1)) __wur;
 159 #endif /* __UCLIBC_HAS_FLOATS__ */
 160 /* Convert a string to an integer.  */
 161 extern int atoi (const char *__nptr)
 162      __THROW __attribute_pure__ __nonnull ((1)) __wur;
 163 libc_hidden_proto(atoi)
 164 /* Convert a string to a long integer.  */
 165 extern long int atol (const char *__nptr)
 166      __THROW __attribute_pure__ __nonnull ((1)) __wur;
 167 __END_NAMESPACE_STD
 168
 169 #if defined __USE_ISOC99 || defined __USE_MISC
 170 __BEGIN_NAMESPACE_C99
 171 /* Convert a string to a long long integer.  */
 172 __extension__ extern long long int atoll (const char *__nptr)
 173      __THROW __attribute_pure__ __nonnull ((1)) __wur;
 174 __END_NAMESPACE_C99
 175 #endif
 176
 177 #ifdef __UCLIBC_HAS_FLOATS__
 178 __BEGIN_NAMESPACE_STD
 179 /* Convert a string to a floating-point number.  */
 180 extern double strtod (const char *__restrict __nptr,
 181                       char **__restrict __endptr)
 182      __THROW __nonnull ((1)) __wur;
 183 libc_hidden_proto(strtod)
 184 __END_NAMESPACE_STD
 185
 186 #ifdef  __USE_ISOC99
 187 __BEGIN_NAMESPACE_C99
 188 /* Likewise for `float' and `long double' sizes of floating-point numbers.  */
 189 extern float strtof (const char *__restrict __nptr,
 190                      char **__restrict __endptr) __THROW __nonnull ((1)) __wur;
 191
 192 extern long double strtold (const char *__restrict __nptr,
 193                             char **__restrict __endptr)
 194      __THROW __nonnull ((1)) __wur;
 195 __END_NAMESPACE_C99
 196 #endif
 197 #endif /* __UCLIBC_HAS_FLOATS__ */
 198
 199 __BEGIN_NAMESPACE_STD
 200 /* Convert a string to a long integer.  */
 201 extern long int strtol (const char *__restrict __nptr,
 202                         char **__restrict __endptr, int __base)
 203      __THROW __nonnull ((1)) __wur;
 204 libc_hidden_proto(strtol)
 205 /* Convert a string to an unsigned long integer.  */
 206 extern unsigned long int strtoul (const char *__restrict __nptr,
 207                                   char **__restrict __endptr, int __base)
 208      __THROW __nonnull ((1)) __wur;
 209 libc_hidden_proto(strtoul)
 210 __END_NAMESPACE_STD
 211
 212 #ifdef __USE_BSD
 213 #include <sys/types.h> /* for u_quad_t */
 214
 215 /* Convert a string to a quadword integer.  */
 216 __extension__
 217 extern quad_t strtoq (const char *__restrict __nptr,
 218                              char **__restrict __endptr, int __base)
 219      __THROW __nonnull ((1)) __wur;
 220 /* Convert a string to an unsigned quadword integer.  */
 221 __extension__
 222 extern u_quad_t strtouq (const char *__restrict __nptr,
 223                                        char **__restrict __endptr, int __base)
 224      __THROW __nonnull ((1)) __wur;
 225 #endif /* GCC and use BSD.  */
 226
 227 #if defined __USE_ISOC99 || defined __USE_MISC
 228 __BEGIN_NAMESPACE_C99
 229 /* Convert a string to a quadword integer.  */
 230 __extension__
 231 extern long long int strtoll (const char *__restrict __nptr,
 232                               char **__restrict __endptr, int __base)
 233      __THROW __nonnull ((1)) __wur;
 234 libc_hidden_proto(strtoll)
 235 /* Convert a string to an unsigned quadword integer.  */
 236 __extension__
 237 extern unsigned long long int strtoull (const char *__restrict __nptr,
 238                                         char **__restrict __endptr, int __base)
 239      __THROW __nonnull ((1)) __wur;
 240 __END_NAMESPACE_C99
 241 #endif /* ISO C99 or GCC and use MISC.  */
 242
 243
 244 #if defined __USE_GNU && defined __UCLIBC_HAS_XLOCALE__
 245 /* The concept of one static locale per category is not very well
 246    thought out.  Many applications will need to process its data using
 247    information from several different locales.  Another problem is
 248    the implementation of the internationalization handling in the
 249    ISO C++ standard library.  To support this another set of
 250    the functions using locale data exist which take an additional
 251    argument.
 252
 253    Attention: even though several *_l interfaces are part of POSIX:2008,
 254    these are not.  */
 255
 256 /* Structure for reentrant locale using functions.  This is an
 257    (almost) opaque type for the user level programs.  */
 258 # include <xlocale.h>
 259
 260 /* Special versions of the functions above which take the locale to
 261    use as an additional parameter.  */
 262 extern long int strtol_l (const char *__restrict __nptr,
 263                           char **__restrict __endptr, int __base,
 264                           __locale_t __loc) __THROW __nonnull ((1, 4)) __wur;
 265 libc_hidden_proto(strtol_l)
 266
 267 extern unsigned long int strtoul_l (const char *__restrict __nptr,
 268                                     char **__restrict __endptr,
 269                                     int __base, __locale_t __loc)
 270      __THROW __nonnull ((1, 4)) __wur;
 271 libc_hidden_proto(strtoul_l)
 272
 273 __extension__
 274 extern long long int strtoll_l (const char *__restrict __nptr,
 275                                 char **__restrict __endptr, int __base,
 276                                 __locale_t __loc)
 277      __THROW __nonnull ((1, 4)) __wur;
 278
 279 __extension__
 280 extern unsigned long long int strtoull_l (const char *__restrict __nptr,
 281                                           char **__restrict __endptr,
 282                                           int __base, __locale_t __loc)
 283      __THROW __nonnull ((1, 4)) __wur;
 284
 285 #ifdef __UCLIBC_HAS_FLOATS__
 286 extern double strtod_l (const char *__restrict __nptr,
 287                         char **__restrict __endptr, __locale_t __loc)
 288      __THROW __nonnull ((1, 3)) __wur;
 289
 290 extern float strtof_l (const char *__restrict __nptr,
 291                        char **__restrict __endptr, __locale_t __loc)
 292      __THROW __nonnull ((1, 3)) __wur;
 293
 294 extern long double strtold_l (const char *__restrict __nptr,
 295                               char **__restrict __endptr,
 296                               __locale_t __loc)
 297      __THROW __nonnull ((1, 3)) __wur;
 298 #endif /* __UCLIBC_HAS_FLOATS__ */
 299 #endif /* GNU */
 300
 301
 302 #if defined __USE_SVID || defined __USE_XOPEN_EXTENDED
 303 /* Convert N to base 64 using the digits "./0-9A-Za-z", least-significant
 304    digit first.  Returns a pointer to static storage overwritten by the
 305    next call.  */
 306 extern char *l64a (long int __n) __THROW __wur;
 307
 308 /* Read a number from a string S in base 64 as above.  */
 309 extern long int a64l (const char *__s)
 310      __THROW __attribute_pure__ __nonnull ((1)) __wur;
 311
 312 #endif  /* Use SVID || extended X/Open.  */
 313
 314 #if defined __USE_SVID || defined __USE_XOPEN_EXTENDED || defined __USE_BSD
 315 # include <sys/types.h> /* we need int32_t... */
 316
 317 /* These are the functions that actually do things.  The `random', `srandom',
 318    `initstate' and `setstate' functions are those from BSD Unices.
 319    The `rand' and `srand' functions are required by the ANSI standard.
 320    We provide both interfaces to the same random number generator.  */
 321 /* Return a random long integer between 0 and RAND_MAX inclusive.  */
 322 extern long int random (void) __THROW;
 323 libc_hidden_proto(random)
 324
 325 /* Seed the random number generator with the given number.  */
 326 extern void srandom (unsigned int __seed) __THROW;
 327
 328 /* Initialize the random number generator to use state buffer STATEBUF,
 329    of length STATELEN, and seed it with SEED.  Optimal lengths are 8, 16,
 330    32, 64, 128 and 256, the bigger the better; values less than 8 will
 331    cause an error and values greater than 256 will be rounded down.  */
 332 extern char *initstate (unsigned int __seed, char *__statebuf,
 333                         size_t __statelen) __THROW __nonnull ((2));
 334
 335 /* Switch the random number generator to state buffer STATEBUF,
 336    which should have been previously initialized by `initstate'.  */
 337 extern char *setstate (char *__statebuf) __THROW __nonnull ((1));
 338
 339
 340 # ifdef __USE_MISC
 341 /* Reentrant versions of the `random' family of functions.
 342    These functions all use the following data structure to contain
 343    state, rather than global state variables.  */
 344
 345 struct random_data
 346   {
 347     int32_t *fptr;              /* Front pointer.  */
 348     int32_t *rptr;              /* Rear pointer.  */
 349     int32_t *state;             /* Array of state values.  */
 350 #if 0
 351     int rand_type;              /* Type of random number generator.  */
 352     int rand_deg;               /* Degree of random number generator.  */
 353     int rand_sep;               /* Distance between front and rear.  */
 354 #else
 355     /* random_r.c, TYPE_x, DEG_x, SEP_x - small enough for int8_t */
 356     int8_t rand_type;           /* Type of random number generator.  */
 357     int8_t rand_deg;            /* Degree of random number generator.  */
 358     int8_t rand_sep;            /* Distance between front and rear.  */
 359 #endif
 360     int32_t *end_ptr;           /* Pointer behind state table.  */
 361   };
 362
 363 extern int random_r (struct random_data *__restrict __buf,
 364                      int32_t *__restrict __result) __THROW __nonnull ((1, 2));
 365 libc_hidden_proto(random_r)
 366
 367 extern int srandom_r (unsigned int __seed, struct random_data *__buf)
 368      __THROW __nonnull ((2));
 369 libc_hidden_proto(srandom_r)
 370
 371 extern int initstate_r (unsigned int __seed, char *__restrict __statebuf,
 372                         size_t __statelen,
 373                         struct random_data *__restrict __buf)
 374      __THROW __nonnull ((2, 4));
 375 libc_hidden_proto(initstate_r)
 376
 377 extern int setstate_r (char *__restrict __statebuf,
 378                        struct random_data *__restrict __buf)
 379      __THROW __nonnull ((1, 2));
 380 libc_hidden_proto(setstate_r)
 381 # endif /* Use misc.  */
 382 #endif  /* Use SVID || extended X/Open || BSD. */
 383
 384
 385 __BEGIN_NAMESPACE_STD
 386 /* Return a random integer between 0 and RAND_MAX inclusive.  */
 387 extern int rand (void) __THROW;
 388 /* Seed the random number generator with the given number.  */
 389 extern void srand (unsigned int __seed) __THROW;
 390 __END_NAMESPACE_STD
 391
 392 #ifdef __USE_POSIX
 393 /* Reentrant interface according to POSIX.1.  */
 394 extern int rand_r (unsigned int *__seed) __THROW;
 395 #endif
 396
 397
 398 #if defined __USE_SVID || defined __USE_XOPEN
 399 /* System V style 48-bit random number generator functions.  */
 400
 401 #ifdef __UCLIBC_HAS_FLOATS__
 402 /* Return non-negative, double-precision floating-point value in [0.0,1.0).  */
 403 extern double drand48 (void) __THROW;
 404 extern double erand48 (unsigned short int __xsubi[3]) __THROW __nonnull ((1));
 405 #endif /* __UCLIBC_HAS_FLOATS__ */
 406
 407 /* Return non-negative, long integer in [0,2^31).  */
 408 extern long int lrand48 (void) __THROW;
 409 extern long int nrand48 (unsigned short int __xsubi[3])
 410      __THROW __nonnull ((1));
 411
 412 /* Return signed, long integers in [-2^31,2^31).  */
 413 extern long int mrand48 (void) __THROW;
 414 extern long int jrand48 (unsigned short int __xsubi[3])
 415      __THROW __nonnull ((1));
 416
 417 /* Seed random number generator.  */
 418 extern void srand48 (long int __seedval) __THROW;
 419 extern unsigned short int *seed48 (unsigned short int __seed16v[3])
 420      __THROW __nonnull ((1));
 421 extern void lcong48 (unsigned short int __param[7]) __THROW __nonnull ((1));
 422
 423 # ifdef __USE_MISC
 424 /* Data structure for communication with thread safe versions.  This
 425    type is to be regarded as opaque.  It's only exported because users
 426    have to allocate objects of this type.  */
 427 struct drand48_data
 428   {
 429     unsigned short int __x[3];  /* Current state.  */
 430     unsigned short int __old_x[3]; /* Old state.  */
 431     unsigned short int __c;     /* Additive const. in congruential formula.  */
 432     unsigned short int __init;  /* Flag for initializing.  */
 433     unsigned long long int __a; /* Factor in congruential formula.  */
 434   };
 435
 436 #ifdef __UCLIBC_HAS_FLOATS__
 437 /* Return non-negative, double-precision floating-point value in [0.0,1.0).  */
 438 extern int drand48_r (struct drand48_data *__restrict __buffer,
 439                       double *__restrict __result) __THROW __nonnull ((1, 2));
 440 extern int erand48_r (unsigned short int __xsubi[3],
 441                       struct drand48_data *__restrict __buffer,
 442                       double *__restrict __result) __THROW __nonnull ((1, 2));
 443 libc_hidden_proto(erand48_r)
 444 #endif /* __UCLIBC_HAS_FLOATS__ */
 445
 446 /* Return non-negative, long integer in [0,2^31).  */
 447 extern int lrand48_r (struct drand48_data *__restrict __buffer,
 448                       long int *__restrict __result)
 449      __THROW __nonnull ((1, 2));
 450 libc_hidden_proto(lrand48_r)
 451 extern int nrand48_r (unsigned short int __xsubi[3],
 452                       struct drand48_data *__restrict __buffer,
 453                       long int *__restrict __result)
 454      __THROW __nonnull ((1, 2));
 455 libc_hidden_proto(nrand48_r)
 456
 457 /* Return signed, long integers in [-2^31,2^31).  */
 458 extern int mrand48_r (struct drand48_data *__restrict __buffer,
 459                       long int *__restrict __result)
 460      __THROW __nonnull ((1, 2));
 461 extern int jrand48_r (unsigned short int __xsubi[3],
 462                       struct drand48_data *__restrict __buffer,
 463                       long int *__restrict __result)
 464      __THROW __nonnull ((1, 2));
 465 libc_hidden_proto(jrand48_r)
 466
 467 /* Seed random number generator.  */
 468 extern int srand48_r (long int __seedval, struct drand48_data *__buffer)
 469      __THROW __nonnull ((2));
 470 libc_hidden_proto(srand48_r)
 471
 472 extern int seed48_r (unsigned short int __seed16v[3],
 473                      struct drand48_data *__buffer) __THROW __nonnull ((1, 2));
 474 libc_hidden_proto(seed48_r)
 475
 476 extern int lcong48_r (unsigned short int __param[7],
 477                       struct drand48_data *__buffer)
 478      __THROW __nonnull ((1, 2));
 479 # endif /* Use misc.  */
 480 #endif  /* Use SVID or X/Open.  */
 481
 482 #endif /* don't just need malloc and calloc */
 483
 484 #ifndef __malloc_and_calloc_defined
 485 # define __malloc_and_calloc_defined
 486 __BEGIN_NAMESPACE_STD
 487 /* Allocate SIZE bytes of memory.  */
 488 extern void *malloc (size_t __size) __THROW __attribute_malloc__ __wur;
 489 /* We want the malloc symbol overridable at runtime, do not hide it! */
 490 /* Allocate NMEMB elements of SIZE bytes each, all initialized to 0.  */
 491 extern void *calloc (size_t __nmemb, size_t __size)
 492      __THROW __attribute_malloc__ __wur;
 493 /* We want the calloc symbol overridable at runtime, do not hide it! */
 494 __END_NAMESPACE_STD
 495 #endif
 496
 497 #ifndef __need_malloc_and_calloc
 498 __BEGIN_NAMESPACE_STD
 499 /* Re-allocate the previously allocated block
 500    in PTR, making the new block SIZE bytes long.  */
 501 /* __attribute_malloc__ is not used, because if realloc returns
 502    the same pointer that was passed to it, aliasing needs to be allowed
 503    between objects pointed by the old and new pointers.  */
 504 extern void *realloc (void *__ptr, size_t __size)
 505      __THROW __wur;
 506 /* We want the realloc symbol overridable at runtime, do not hide it! */
 507 /* Free a block allocated by `malloc', `realloc' or `calloc'.  */
 508 extern void free (void *__ptr) __THROW;
 509 /* We want the free symbol overridable at runtime, do not hide it! */
 510 __END_NAMESPACE_STD
 511
 512 #if 0 /*def     __USE_MISC*/
 513 /* Free a block.  An alias for `free'.  (Sun Unices).  */
 514 extern void cfree (void *__ptr) __THROW;
 515 #endif /* Use misc.  */
 516
 517 #if defined __USE_GNU || defined __USE_BSD || defined __USE_MISC
 518 # include <alloca.h>
 519 #endif /* Use GNU, BSD, or misc.  */
 520
 521 #ifdef __UCLIBC_SUSV2_LEGACY__
 522 # if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
 523 /* Allocate SIZE bytes on a page boundary.  The storage cannot be freed.  */
 524 extern void *valloc (size_t __size) __THROW __attribute_malloc__ __wur;
 525 # endif
 526 #endif
 527
 528 #if defined __USE_XOPEN2K && defined __UCLIBC_HAS_ADVANCED_REALTIME__
 529 /* Allocate memory of SIZE bytes with an alignment of ALIGNMENT.  */
 530 extern int posix_memalign (void **__memptr, size_t __alignment, size_t __size)
 531      __THROW __nonnull ((1)) __wur;
 532 #endif
 533
 534 #ifdef __USE_ISOC11
 535 /* ISO C variant of aligned allocation.  */
 536 extern void *aligned_alloc (size_t __alignment, size_t __size)
 537      __THROW __attribute_malloc__ __attribute_alloc_size__ ((2)) __wur;
 538 #endif
 539
 540 __BEGIN_NAMESPACE_STD
 541 /* Abort execution and generate a core-dump.  */
 542 extern void abort (void) __THROW __attribute__ ((__noreturn__));
 543 libc_hidden_proto(abort)
 544
 545
 546 /* Register a function to be called when `exit' is called.  */
 547 extern int atexit (void (*__func) (void)) __THROW __nonnull ((1));
 548 __END_NAMESPACE_STD
 549
 550 #ifdef  __USE_MISC
 551 /* Register a function to be called with the status
 552    given to `exit' and the given argument.  */
 553 extern int on_exit (void (*__func) (int __status, void *__arg), void *__arg)
 554      __THROW __nonnull ((1));
 555 #endif
 556
 557 __BEGIN_NAMESPACE_STD
 558 /* Call all functions registered with `atexit' and `on_exit',
 559    in the reverse of the order in which they were registered,
 560    perform stdio cleanup, and terminate program execution with STATUS.  */
 561 extern void exit (int __status) __THROW __attribute__ ((__noreturn__));
 562 libc_hidden_proto(exit)
 563 __END_NAMESPACE_STD
 564
 565 #ifdef __USE_ISOC99
 566 __BEGIN_NAMESPACE_C99
 567 /* Terminate the program with STATUS without calling any of the
 568    functions registered with `atexit' or `on_exit'.  */
 569 extern void _Exit (int __status) __THROW __attribute__ ((__noreturn__));
 570 __END_NAMESPACE_C99
 571 #endif
 572
 573
 574 __BEGIN_NAMESPACE_STD
 575 /* Return the value of envariable NAME, or NULL if it doesn't exist.  */
 576 extern char *getenv (const char *__name) __THROW __nonnull ((1)) __wur;
 577 libc_hidden_proto(getenv)
 578 __END_NAMESPACE_STD
 579
 580 /* This function is similar to the above but returns NULL if the
 581    programs is running with SUID or SGID enabled.  */
 582 extern char *secure_getenv (const char *__name)
 583      __THROW __nonnull ((1)) __wur;
 584
 585 #if defined __USE_SVID || defined __USE_XOPEN
 586 /* The SVID says this is in <stdio.h>, but this seems a better place.   */
 587 /* Put STRING, which is of the form "NAME=VALUE", in the environment.
 588    If there is no `=', remove NAME from the environment.  */
 589 extern int putenv (char *__string) __THROW __nonnull ((1));
 590 #endif
 591
 592 #if defined __USE_BSD || defined __USE_XOPEN2K
 593 /* Set NAME to VALUE in the environment.
 594    If REPLACE is nonzero, overwrite an existing value.  */
 595 extern int setenv (const char *__name, const char *__value, int __replace)
 596      __THROW __nonnull ((2));
 597 libc_hidden_proto(setenv)
 598
 599 /* Remove the variable NAME from the environment.  */
 600 extern int unsetenv (const char *__name) __THROW;
 601 libc_hidden_proto(unsetenv)
 602 #endif
 603
 604 /* The following is used by uClibc in atexit.c and sysconf.c */
 605 /* We have no limit when __UCLIBC_DYNAMIC_ATEXIT__ is enabled.  */
 606 #ifdef __UCLIBC_DYNAMIC_ATEXIT__
 607 # define __UCLIBC_MAX_ATEXIT     INT_MAX
 608 #else
 609 # define __UCLIBC_MAX_ATEXIT     20
 610 #endif
 611
 612
 613 #ifdef  __USE_MISC
 614 /* The `clearenv' was planned to be added to POSIX.1 but probably
 615    never made it.  Nevertheless the POSIX.9 standard (POSIX bindings
 616    for Fortran 77) requires this function.  */
 617 extern int clearenv (void) __THROW;
 618 #endif
 619
 620
 621 #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
 622 # if defined __UCLIBC_SUSV3_LEGACY__
 623 /* Generate a unique temporary file name from TEMPLATE.
 624    The last six characters of TEMPLATE must be "XXXXXX";
 625    they are replaced with a string that makes the file name unique.
 626    Returns TEMPLATE, or a null pointer if it cannot get a unique file name.  */
 627 extern char *mktemp (char *__template) __THROW __nonnull ((1)) __wur;
 628 # endif
 629
 630 /* Generate a unique temporary file name from TEMPLATE.
 631    The last six characters of TEMPLATE must be "XXXXXX";
 632    they are replaced with a string that makes the filename unique.
 633    Returns a file descriptor open on the file for reading and writing,
 634    or -1 if it cannot create a uniquely-named file.
 635
 636    This function is a possible cancellation point and therefore not
 637    marked with __THROW.  */
 638 # ifndef __USE_FILE_OFFSET64
 639 extern int mkstemp (char *__template) __nonnull ((1)) __wur;
 640 # else
 641 #  ifdef __REDIRECT
 642 extern int __REDIRECT (mkstemp, (char *__template), mkstemp64)
 643      __nonnull ((1)) __wur;
 644 #  else
 645 #   define mkstemp mkstemp64
 646 #  endif
 647 # endif
 648 # ifdef __USE_LARGEFILE64
 649 extern int mkstemp64 (char *__template) __nonnull ((1)) __wur;
 650 # endif
 651 #endif
 652
 653 #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
 654 # if defined __UCLIBC_SUSV3_LEGACY__
 655 extern char *mktemps (char *__template, int __suffixlen) __THROW __nonnull ((1)) __wur;
 656 # endif
 657
 658 /* The mkstemps() function is like mkstemp(), except that  the  string  in
 659    template  contains a suffix of suffixlen characters.  Thus, template is
 660    of the form prefixXXXXXXsuffix, and the string XXXXXX  is  modified  as
 661    for mkstemp().
 662    Returns a file descriptor open on the file for reading and writing,
 663    or -1 if it cannot create a uniquely-named file.
 664
 665    This function is a possible cancellation point and therefore not
 666    marked with __THROW.  */
 667 # ifndef __USE_FILE_OFFSET64
 668 extern int mkstemps (char *__template, int __suffixlen) __nonnull ((1)) __wur;
 669 # else
 670 #  ifdef __REDIRECT
 671 extern int __REDIRECT (mkstemps, (char *__template, int __suffixlen), mkstemps64)
 672      __nonnull ((1)) __wur;
 673 #  else
 674 #   define mkstemps mkstemps64
 675 #  endif
 676 # endif
 677 # ifdef __USE_LARGEFILE64
 678 extern int mkstemps64 (char *__template, int __suffixlen) __nonnull ((1)) __wur;
 679 # endif
 680 #endif
 681
 682 #if defined __USE_BSD || defined __USE_XOPEN2K8
 683 /* Create a unique temporary directory from TEMPLATE.
 684    The last six characters of TEMPLATE must be "XXXXXX";
 685    they are replaced with a string that makes the directory name unique.
 686    Returns TEMPLATE, or a null pointer if it cannot get a unique name.
 687    The directory is created mode 700.  */
 688 extern char *mkdtemp (char *__template) __THROW __nonnull ((1)) __wur;
 689 #endif
 690
 691 #ifdef __USE_GNU
 692 /* Generate a unique temporary file name from TEMPLATE similar to
 693    mkstemp.  But allow the caller to pass additional flags which are
 694    used in the open call to create the file..
 695
 696    This function is a possible cancellation point and therefore not
 697    marked with __THROW.  */
 698 # ifndef __USE_FILE_OFFSET64
 699 extern int mkostemp (char *__template, int __flags) __nonnull ((1)) __wur;
 700 # else
 701 #  ifdef __REDIRECT
 702 extern int __REDIRECT (mkostemp, (char *__template, int __flags), mkostemp64)
 703      __nonnull ((1)) __wur;
 704 #  else
 705 #   define mkostemp mkostemp64
 706 #  endif
 707 # endif
 708 # ifdef __USE_LARGEFILE64
 709 extern int mkostemp64 (char *__template, int __flags) __nonnull ((1)) __wur;
 710 # endif
 711 #endif
 712
 713 #ifdef __USE_GNU
 714 /* Generate a unique temporary file name from TEMPLATE similar to
 715    mkostemp.  But allow the caller to pass additional file name suffix.
 716
 717    This function is a possible cancellation point and therefore not
 718    marked with __THROW.  */
 719 # ifndef __USE_FILE_OFFSET64
 720 extern int mkostemps (char *__template, int __suffixlen, int __flags) __nonnull ((1)) __wur;
 721 # else
 722 #  ifdef __REDIRECT
 723 extern int __REDIRECT (mkostemps, (char *__template, int __suffixlen, int __flags), mkostemps64)
 724      __nonnull ((1)) __wur;
 725 #  else
 726 #   define mkostemps mkostemps64
 727 #  endif
 728 # endif
 729 # ifdef __USE_LARGEFILE64
 730 extern int mkostemps64 (char *__template, int __suffixlen, int __flags) __nonnull ((1)) __wur;
 731 # endif
 732 #endif
 733
 734
 735 __BEGIN_NAMESPACE_STD
 736 /* Execute the given line as a shell command.
 737
 738    This function is a cancellation point and therefore not marked with
 739    __THROW.  */
 740 extern int system (const char *__command) __wur;
 741 __END_NAMESPACE_STD
 742
 743
 744 #ifdef  __USE_GNU
 745 /* Return a malloc'd string containing the canonical absolute name of the
 746    existing named file.  */
 747 extern char *canonicalize_file_name (const char *__name)
 748      __THROW __nonnull ((1)) __wur;
 749 #endif
 750
 751 #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
 752 /* Return the canonical absolute name of file NAME.  If RESOLVED is
 753    null, the result is malloc'd; otherwise, if the canonical name is
 754    PATH_MAX chars or more, returns null with `errno' set to
 755    ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars,
 756    returns the name in RESOLVED.  */
 757 extern char *realpath (const char *__restrict __name,
 758                        char *__restrict __resolved) __THROW __wur;
 759 libc_hidden_proto(realpath)
 760 #endif
 761
 762
 763 /* Shorthand for type of comparison functions.  */
 764 #ifndef __COMPAR_FN_T
 765 # define __COMPAR_FN_T
 766 typedef int (*__compar_fn_t) (const void *, const void *);
 767
 768 # ifdef __USE_GNU
 769 typedef __compar_fn_t comparison_fn_t;
 770 # endif
 771 #endif
 772 #ifdef __USE_GNU
 773 typedef int (*__compar_d_fn_t) (const void *, const void *, void *);
 774 #endif
 775
 776 __BEGIN_NAMESPACE_STD
 777 /* Do a binary search for KEY in BASE, which consists of NMEMB elements
 778    of SIZE bytes each, using COMPAR to perform the comparisons.  */
 779 extern void *bsearch (const void *__key, const void *__base,
 780                       size_t __nmemb, size_t __size, __compar_fn_t __compar)
 781      __nonnull ((1, 2, 5)) __wur;
 782
 783 /* Sort NMEMB elements of BASE, of SIZE bytes each,
 784    using COMPAR to perform the comparisons.  */
 785 extern void qsort (void *__base, size_t __nmemb, size_t __size,
 786                    __compar_fn_t __compar) __nonnull ((1, 4));
 787 libc_hidden_proto(qsort)
 788 #ifdef __USE_GNU
 789 extern void qsort_r (void *__base, size_t __nmemb, size_t __size,
 790                    __compar_d_fn_t __compar, void *__arg)
 791   __nonnull ((1, 4));
 792 libc_hidden_proto(qsort_r)
 793 #endif
 794
 795 /* Return the absolute value of X.  */
 796 extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur;
 797 extern long int labs (long int __x) __THROW __attribute__ ((__const__)) __wur;
 798 __END_NAMESPACE_STD
 799
 800 #ifdef __USE_ISOC99
 801 __extension__ extern long long int llabs (long long int __x)
 802      __THROW __attribute__ ((__const__)) __wur;
 803 #endif
 804
 805
 806 __BEGIN_NAMESPACE_STD
 807 /* Return the `div_t', `ldiv_t' or `lldiv_t' representation
 808    of the value of NUMER over DENOM. */
 809 /* GCC may have built-ins for these someday.  */
 810 extern div_t div (int __numer, int __denom)
 811      __THROW __attribute__ ((__const__)) __wur;
 812 extern ldiv_t ldiv (long int __numer, long int __denom)
 813      __THROW __attribute__ ((__const__)) __wur;
 814 __END_NAMESPACE_STD
 815
 816 #ifdef __USE_ISOC99
 817 __BEGIN_NAMESPACE_C99
 818 __extension__ extern lldiv_t lldiv (long long int __numer,
 819                                     long long int __denom)
 820      __THROW __attribute__ ((__const__)) __wur;
 821 __END_NAMESPACE_C99
 822 #endif
 823
 824
 825 #if ( defined __USE_SVID || defined __USE_XOPEN_EXTENDED ) && defined __UCLIBC_HAS_FLOATS__
 826 /* Convert floating point numbers to strings.  The returned values are
 827    valid only until another call to the same function.  */
 828
 829 # ifdef __UCLIBC_SUSV3_LEGACY__
 830 #if 0
 831 /* Convert VALUE to a string with NDIGIT digits and return a pointer to
 832    this.  Set *DECPT with the position of the decimal character and *SIGN
 833    with the sign of the number.  */
 834 extern char *ecvt (double __value, int __ndigit, int *__restrict __decpt,
 835                    int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur;
 836
 837 /* Convert VALUE to a string rounded to NDIGIT decimal digits.  Set *DECPT
 838    with the position of the decimal character and *SIGN with the sign of
 839    the number.  */
 840 extern char *fcvt (double __value, int __ndigit, int *__restrict __decpt,
 841                    int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur;
 842 #endif
 843
 844 /* If possible convert VALUE to a string with NDIGIT significant digits.
 845    Otherwise use exponential representation.  The resulting string will
 846    be written to BUF.  */
 847 extern char *gcvt (double __value, int __ndigit, char *__buf)
 848      __THROW __nonnull ((3)) __wur;
 849 # endif /* __UCLIBC_SUSV3_LEGACY__ */
 850
 851
 852 # if 0 /*def __USE_MISC*/
 853 /* Long double versions of above functions.  */
 854 extern char *qecvt (long double __value, int __ndigit,
 855                     int *__restrict __decpt, int *__restrict __sign)
 856      __THROW __nonnull ((3, 4)) __wur;
 857 extern char *qfcvt (long double __value, int __ndigit,
 858                     int *__restrict __decpt, int *__restrict __sign)
 859      __THROW __nonnull ((3, 4)) __wur;
 860 extern char *qgcvt (long double __value, int __ndigit, char *__buf)
 861      __THROW __nonnull ((3)) __wur;
 862
 863
 864 /* Reentrant version of the functions above which provide their own
 865    buffers.  */
 866 extern int ecvt_r (double __value, int __ndigit, int *__restrict __decpt,
 867                    int *__restrict __sign, char *__restrict __buf,
 868                    size_t __len) __THROW __nonnull ((3, 4, 5));
 869 extern int fcvt_r (double __value, int __ndigit, int *__restrict __decpt,
 870                    int *__restrict __sign, char *__restrict __buf,
 871                    size_t __len) __THROW __nonnull ((3, 4, 5));
 872
 873 extern int qecvt_r (long double __value, int __ndigit,
 874                     int *__restrict __decpt, int *__restrict __sign,
 875                     char *__restrict __buf, size_t __len)
 876      __THROW __nonnull ((3, 4, 5));
 877 extern int qfcvt_r (long double __value, int __ndigit,
 878                     int *__restrict __decpt, int *__restrict __sign,
 879                     char *__restrict __buf, size_t __len)
 880      __THROW __nonnull ((3, 4, 5));
 881 # endif /* misc */
 882 #endif  /* use MISC || use X/Open Unix */
 883
 884
 885 #ifdef __UCLIBC_HAS_WCHAR__
 886 __BEGIN_NAMESPACE_STD
 887 /* Return the length of the multibyte character
 888    in S, which is no longer than N.  */
 889 extern int mblen (const char *__s, size_t __n) __THROW __wur;
 890 /* Return the length of the given multibyte character,
 891    putting its `wchar_t' representation in *PWC.  */
 892 extern int mbtowc (wchar_t *__restrict __pwc,
 893                    const char *__restrict __s, size_t __n) __THROW __wur;
 894 /* Put the multibyte character represented
 895    by WCHAR in S, returning its length.  */
 896 extern int wctomb (char *__s, wchar_t __wchar) __THROW __wur;
 897
 898
 899 /* Convert a multibyte string to a wide char string.  */
 900 extern size_t mbstowcs (wchar_t *__restrict  __pwcs,
 901                         const char *__restrict __s, size_t __n) __THROW;
 902 /* Convert a wide char string to multibyte string.  */
 903 extern size_t wcstombs (char *__restrict __s,
 904                         const wchar_t *__restrict __pwcs, size_t __n)
 905      __THROW;
 906 __END_NAMESPACE_STD
 907 #endif /* __UCLIBC_HAS_WCHAR__ */
 908
 909
 910 #ifdef __USE_SVID
 911 /* Determine whether the string value of RESPONSE matches the affirmation
 912    or negative response expression as specified by the LC_MESSAGES category
 913    in the program's current locale.  Returns 1 if affirmative, 0 if
 914    negative, and -1 if not matching.  */
 915 extern int rpmatch (const char *__response) __THROW __nonnull ((1)) __wur;
 916 #endif
 917
 918
 919 #ifdef __USE_XOPEN_EXTENDED
 920 /* Parse comma separated suboption from *OPTIONP and match against
 921    strings in TOKENS.  If found return index and set *VALUEP to
 922    optional value introduced by an equal sign.  If the suboption is
 923    not part of TOKENS return in *VALUEP beginning of unknown
 924    suboption.  On exit *OPTIONP is set to the beginning of the next
 925    token or at the terminating NUL character.  */
 926 extern int getsubopt (char **__restrict __optionp,
 927                       char *const *__restrict __tokens,
 928                       char **__restrict __valuep)
 929      __THROW __nonnull ((1, 2, 3)) __wur;
 930 #endif
 931
 932
 933 #ifdef __USE_XOPEN
 934 # if defined __UCLIBC_HAS_CRYPT__
 935 /* Setup DES tables according KEY.  */
 936 extern void setkey (const char *__key) __THROW __nonnull ((1));
 937 # endif /* __UCLIBC_HAS_CRYPT__ */
 938 #endif
 939
 940
 941 /* X/Open pseudo terminal handling.  */
 942
 943 #ifdef __USE_XOPEN2K
 944 /* Return a master pseudo-terminal handle.  */
 945 extern int posix_openpt (int __oflag) __wur;
 946 #endif
 947
 948 #ifdef __USE_XOPEN
 949 /* The next four functions all take a master pseudo-tty fd and
 950    perform an operation on the associated slave:  */
 951
 952 #ifdef __UCLIBC_HAS_PTY__
 953 /* Chown the slave to the calling user.  */
 954 extern int grantpt (int __fd) __THROW;
 955
 956 /* Release an internal lock so the slave can be opened.
 957    Call after grantpt().  */
 958 extern int unlockpt (int __fd) __THROW;
 959
 960 /* Return the pathname of the pseudo terminal slave assoicated with
 961    the master FD is open on, or NULL on errors.
 962    The returned storage is good until the next call to this function.  */
 963 extern char *ptsname (int __fd) __THROW __wur;
 964 #endif /* __UCLIBC_HAS_PTY__ */
 965 #endif
 966
 967 #ifdef __USE_GNU
 968 # if defined __UCLIBC_HAS_PTY__
 969 /* Store at most BUFLEN characters of the pathname of the slave pseudo
 970    terminal associated with the master FD is open on in BUF.
 971    Return 0 on success, otherwise an error number.  */
 972 extern int ptsname_r (int __fd, char *__buf, size_t __buflen)
 973      __THROW __nonnull ((2));
 974 libc_hidden_proto(ptsname_r)
 975 # endif
 976 # if defined __UCLIBC_HAS_GETPT__
 977 /* Open a master pseudo terminal and return its file descriptor.  */
 978 extern int getpt (void);
 979 # endif
 980 #endif
 981
 982 #if 0 /* def __USE_BSD */
 983 /* Put the 1 minute, 5 minute and 15 minute load averages into the first
 984    NELEM elements of LOADAVG.  Return the number written (never more than
 985    three, but may be less than NELEM), or -1 if an error occurred.  */
 986 extern int getloadavg (double __loadavg[], int __nelem)
 987      __THROW __nonnull ((1));
 988 #endif
 989
 990 #ifdef __UCLIBC_HAS_ARC4RANDOM__
 991 # include <sys/types.h>
 992 extern u_int32_t arc4random(void);
 993 extern void arc4random_stir(void);
 994 extern void arc4random_addrandom(unsigned char *, int);
 995 #endif
 996
 997 #ifdef _LIBC
 998 extern int __drand48_iterate (unsigned short int xsubi[3], struct drand48_data *buffer) attribute_hidden;
 999
1000 /* Global state for non-reentrant functions.  */
1001 extern struct drand48_data __libc_drand48_data attribute_hidden;
1002 #endif
1003
1004 #endif /* don't just need malloc and calloc */
1005 #undef __need_malloc_and_calloc
1006
1007 __END_DECLS
1008
1009 #endif /* stdlib.h  */