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 #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
 522 /* Allocate SIZE bytes on a page boundary.  The storage cannot be freed.  */
 523 extern void *valloc (size_t __size) __THROW __attribute_malloc__ __wur;
 524 #endif
 525
 526 #if defined __USE_XOPEN2K && defined __UCLIBC_HAS_ADVANCED_REALTIME__
 527 /* Allocate memory of SIZE bytes with an alignment of ALIGNMENT.  */
 528 extern int posix_memalign (void **__memptr, size_t __alignment, size_t __size)
 529      __THROW __nonnull ((1)) __wur;
 530 #endif
 531
 532 #ifdef __USE_ISOC11
 533 /* ISO C variant of aligned allocation.  */
 534 extern void *aligned_alloc (size_t __alignment, size_t __size)
 535      __THROW __attribute_malloc__ __attribute_alloc_size__ ((2)) __wur;
 536 #endif
 537
 538 __BEGIN_NAMESPACE_STD
 539 /* Abort execution and generate a core-dump.  */
 540 extern void abort (void) __THROW __attribute__ ((__noreturn__));
 541 libc_hidden_proto(abort)
 542
 543
 544 /* Register a function to be called when `exit' is called.  */
 545 extern int atexit (void (*__func) (void)) __THROW __nonnull ((1));
 546 __END_NAMESPACE_STD
 547
 548 #ifdef  __USE_MISC
 549 /* Register a function to be called with the status
 550    given to `exit' and the given argument.  */
 551 extern int on_exit (void (*__func) (int __status, void *__arg), void *__arg)
 552      __THROW __nonnull ((1));
 553 #endif
 554
 555 __BEGIN_NAMESPACE_STD
 556 /* Call all functions registered with `atexit' and `on_exit',
 557    in the reverse of the order in which they were registered,
 558    perform stdio cleanup, and terminate program execution with STATUS.  */
 559 extern void exit (int __status) __THROW __attribute__ ((__noreturn__));
 560 libc_hidden_proto(exit)
 561 __END_NAMESPACE_STD
 562
 563 #ifdef __USE_ISOC99
 564 __BEGIN_NAMESPACE_C99
 565 /* Terminate the program with STATUS without calling any of the
 566    functions registered with `atexit' or `on_exit'.  */
 567 extern void _Exit (int __status) __THROW __attribute__ ((__noreturn__));
 568 __END_NAMESPACE_C99
 569 #endif
 570
 571
 572 __BEGIN_NAMESPACE_STD
 573 /* Return the value of envariable NAME, or NULL if it doesn't exist.  */
 574 extern char *getenv (const char *__name) __THROW __nonnull ((1)) __wur;
 575 libc_hidden_proto(getenv)
 576 __END_NAMESPACE_STD
 577
 578 /* This function is similar to the above but returns NULL if the
 579    programs is running with SUID or SGID enabled.  */
 580 extern char *secure_getenv (const char *__name)
 581      __THROW __nonnull ((1)) __wur;
 582
 583 #if defined __USE_SVID || defined __USE_XOPEN
 584 /* The SVID says this is in <stdio.h>, but this seems a better place.   */
 585 /* Put STRING, which is of the form "NAME=VALUE", in the environment.
 586    If there is no `=', remove NAME from the environment.  */
 587 extern int putenv (char *__string) __THROW __nonnull ((1));
 588 #endif
 589
 590 #if defined __USE_BSD || defined __USE_XOPEN2K
 591 /* Set NAME to VALUE in the environment.
 592    If REPLACE is nonzero, overwrite an existing value.  */
 593 extern int setenv (const char *__name, const char *__value, int __replace)
 594      __THROW __nonnull ((2));
 595 libc_hidden_proto(setenv)
 596
 597 /* Remove the variable NAME from the environment.  */
 598 extern int unsetenv (const char *__name) __THROW;
 599 libc_hidden_proto(unsetenv)
 600 #endif
 601
 602 /* The following is used by uClibc in atexit.c and sysconf.c */
 603 /* We have no limit when __UCLIBC_DYNAMIC_ATEXIT__ is enabled.  */
 604 #ifdef __UCLIBC_DYNAMIC_ATEXIT__
 605 # define __UCLIBC_MAX_ATEXIT     INT_MAX
 606 #else
 607 # define __UCLIBC_MAX_ATEXIT     20
 608 #endif
 609
 610
 611 #ifdef  __USE_MISC
 612 /* The `clearenv' was planned to be added to POSIX.1 but probably
 613    never made it.  Nevertheless the POSIX.9 standard (POSIX bindings
 614    for Fortran 77) requires this function.  */
 615 extern int clearenv (void) __THROW;
 616 #endif
 617
 618
 619 #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
 620 # if defined __UCLIBC_SUSV3_LEGACY__
 621 /* Generate a unique temporary file name from TEMPLATE.
 622    The last six characters of TEMPLATE must be "XXXXXX";
 623    they are replaced with a string that makes the file name unique.
 624    Returns TEMPLATE, or a null pointer if it cannot get a unique file name.  */
 625 extern char *mktemp (char *__template) __THROW __nonnull ((1)) __wur;
 626 # endif
 627
 628 /* Generate a unique temporary file name from TEMPLATE.
 629    The last six characters of TEMPLATE must be "XXXXXX";
 630    they are replaced with a string that makes the filename unique.
 631    Returns a file descriptor open on the file for reading and writing,
 632    or -1 if it cannot create a uniquely-named file.
 633
 634    This function is a possible cancellation point and therefore not
 635    marked with __THROW.  */
 636 # ifndef __USE_FILE_OFFSET64
 637 extern int mkstemp (char *__template) __nonnull ((1)) __wur;
 638 # else
 639 #  ifdef __REDIRECT
 640 extern int __REDIRECT (mkstemp, (char *__template), mkstemp64)
 641      __nonnull ((1)) __wur;
 642 #  else
 643 #   define mkstemp mkstemp64
 644 #  endif
 645 # endif
 646 # ifdef __USE_LARGEFILE64
 647 extern int mkstemp64 (char *__template) __nonnull ((1)) __wur;
 648 # endif
 649 #endif
 650
 651 #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
 652 # if defined __UCLIBC_SUSV3_LEGACY__
 653 extern char *mktemps (char *__template, int __suffixlen) __THROW __nonnull ((1)) __wur;
 654 # endif
 655
 656 /* The mkstemps() function is like mkstemp(), except that  the  string  in
 657    template  contains a suffix of suffixlen characters.  Thus, template is
 658    of the form prefixXXXXXXsuffix, and the string XXXXXX  is  modified  as
 659    for mkstemp().
 660    Returns a file descriptor open on the file for reading and writing,
 661    or -1 if it cannot create a uniquely-named file.
 662
 663    This function is a possible cancellation point and therefore not
 664    marked with __THROW.  */
 665 # ifndef __USE_FILE_OFFSET64
 666 extern int mkstemps (char *__template, int __suffixlen) __nonnull ((1)) __wur;
 667 # else
 668 #  ifdef __REDIRECT
 669 extern int __REDIRECT (mkstemps, (char *__template, int __suffixlen), mkstemps64)
 670      __nonnull ((1)) __wur;
 671 #  else
 672 #   define mkstemps mkstemps64
 673 #  endif
 674 # endif
 675 # ifdef __USE_LARGEFILE64
 676 extern int mkstemps64 (char *__template, int __suffixlen) __nonnull ((1)) __wur;
 677 # endif
 678 #endif
 679
 680 #if defined __USE_BSD || defined __USE_XOPEN2K8
 681 /* Create a unique temporary directory from TEMPLATE.
 682    The last six characters of TEMPLATE must be "XXXXXX";
 683    they are replaced with a string that makes the directory name unique.
 684    Returns TEMPLATE, or a null pointer if it cannot get a unique name.
 685    The directory is created mode 700.  */
 686 extern char *mkdtemp (char *__template) __THROW __nonnull ((1)) __wur;
 687 #endif
 688
 689 #ifdef __USE_GNU
 690 /* Generate a unique temporary file name from TEMPLATE similar to
 691    mkstemp.  But allow the caller to pass additional flags which are
 692    used in the open call to create the file..
 693
 694    This function is a possible cancellation point and therefore not
 695    marked with __THROW.  */
 696 # ifndef __USE_FILE_OFFSET64
 697 extern int mkostemp (char *__template, int __flags) __nonnull ((1)) __wur;
 698 # else
 699 #  ifdef __REDIRECT
 700 extern int __REDIRECT (mkostemp, (char *__template, int __flags), mkostemp64)
 701      __nonnull ((1)) __wur;
 702 #  else
 703 #   define mkostemp mkostemp64
 704 #  endif
 705 # endif
 706 # ifdef __USE_LARGEFILE64
 707 extern int mkostemp64 (char *__template, int __flags) __nonnull ((1)) __wur;
 708 # endif
 709 #endif
 710
 711 #ifdef __USE_GNU
 712 /* Generate a unique temporary file name from TEMPLATE similar to
 713    mkostemp.  But allow the caller to pass additional file name suffix.
 714
 715    This function is a possible cancellation point and therefore not
 716    marked with __THROW.  */
 717 # ifndef __USE_FILE_OFFSET64
 718 extern int mkostemps (char *__template, int __suffixlen, int __flags) __nonnull ((1)) __wur;
 719 # else
 720 #  ifdef __REDIRECT
 721 extern int __REDIRECT (mkostemps, (char *__template, int __suffixlen, int __flags), mkostemps64)
 722      __nonnull ((1)) __wur;
 723 #  else
 724 #   define mkostemps mkostemps64
 725 #  endif
 726 # endif
 727 # ifdef __USE_LARGEFILE64
 728 extern int mkostemps64 (char *__template, int __suffixlen, int __flags) __nonnull ((1)) __wur;
 729 # endif
 730 #endif
 731
 732
 733 __BEGIN_NAMESPACE_STD
 734 /* Execute the given line as a shell command.
 735
 736    This function is a cancellation point and therefore not marked with
 737    __THROW.  */
 738 extern int system (const char *__command) __wur;
 739 __END_NAMESPACE_STD
 740
 741
 742 #ifdef  __USE_GNU
 743 /* Return a malloc'd string containing the canonical absolute name of the
 744    existing named file.  */
 745 extern char *canonicalize_file_name (const char *__name)
 746      __THROW __nonnull ((1)) __wur;
 747 #endif
 748
 749 #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
 750 /* Return the canonical absolute name of file NAME.  If RESOLVED is
 751    null, the result is malloc'd; otherwise, if the canonical name is
 752    PATH_MAX chars or more, returns null with `errno' set to
 753    ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars,
 754    returns the name in RESOLVED.  */
 755 extern char *realpath (const char *__restrict __name,
 756                        char *__restrict __resolved) __THROW __wur;
 757 libc_hidden_proto(realpath)
 758 #endif
 759
 760
 761 /* Shorthand for type of comparison functions.  */
 762 #ifndef __COMPAR_FN_T
 763 # define __COMPAR_FN_T
 764 typedef int (*__compar_fn_t) (const void *, const void *);
 765
 766 # ifdef __USE_GNU
 767 typedef __compar_fn_t comparison_fn_t;
 768 # endif
 769 #endif
 770 #ifdef __USE_GNU
 771 typedef int (*__compar_d_fn_t) (const void *, const void *, void *);
 772 #endif
 773
 774 __BEGIN_NAMESPACE_STD
 775 /* Do a binary search for KEY in BASE, which consists of NMEMB elements
 776    of SIZE bytes each, using COMPAR to perform the comparisons.  */
 777 extern void *bsearch (const void *__key, const void *__base,
 778                       size_t __nmemb, size_t __size, __compar_fn_t __compar)
 779      __nonnull ((1, 2, 5)) __wur;
 780
 781 /* Sort NMEMB elements of BASE, of SIZE bytes each,
 782    using COMPAR to perform the comparisons.  */
 783 extern void qsort (void *__base, size_t __nmemb, size_t __size,
 784                    __compar_fn_t __compar) __nonnull ((1, 4));
 785 libc_hidden_proto(qsort)
 786 #ifdef __USE_GNU
 787 extern void qsort_r (void *__base, size_t __nmemb, size_t __size,
 788                    __compar_d_fn_t __compar, void *__arg)
 789   __nonnull ((1, 4));
 790 libc_hidden_proto(qsort_r)
 791 #endif
 792
 793 /* Return the absolute value of X.  */
 794 extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur;
 795 extern long int labs (long int __x) __THROW __attribute__ ((__const__)) __wur;
 796 __END_NAMESPACE_STD
 797
 798 #ifdef __USE_ISOC99
 799 __extension__ extern long long int llabs (long long int __x)
 800      __THROW __attribute__ ((__const__)) __wur;
 801 #endif
 802
 803
 804 __BEGIN_NAMESPACE_STD
 805 /* Return the `div_t', `ldiv_t' or `lldiv_t' representation
 806    of the value of NUMER over DENOM. */
 807 /* GCC may have built-ins for these someday.  */
 808 extern div_t div (int __numer, int __denom)
 809      __THROW __attribute__ ((__const__)) __wur;
 810 extern ldiv_t ldiv (long int __numer, long int __denom)
 811      __THROW __attribute__ ((__const__)) __wur;
 812 __END_NAMESPACE_STD
 813
 814 #ifdef __USE_ISOC99
 815 __BEGIN_NAMESPACE_C99
 816 __extension__ extern lldiv_t lldiv (long long int __numer,
 817                                     long long int __denom)
 818      __THROW __attribute__ ((__const__)) __wur;
 819 __END_NAMESPACE_C99
 820 #endif
 821
 822
 823 #if ( defined __USE_SVID || defined __USE_XOPEN_EXTENDED ) && defined __UCLIBC_HAS_FLOATS__
 824 /* Convert floating point numbers to strings.  The returned values are
 825    valid only until another call to the same function.  */
 826
 827 # ifdef __UCLIBC_SUSV3_LEGACY__
 828 #if 0
 829 /* Convert VALUE to a string with NDIGIT digits and return a pointer to
 830    this.  Set *DECPT with the position of the decimal character and *SIGN
 831    with the sign of the number.  */
 832 extern char *ecvt (double __value, int __ndigit, int *__restrict __decpt,
 833                    int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur;
 834
 835 /* Convert VALUE to a string rounded to NDIGIT decimal digits.  Set *DECPT
 836    with the position of the decimal character and *SIGN with the sign of
 837    the number.  */
 838 extern char *fcvt (double __value, int __ndigit, int *__restrict __decpt,
 839                    int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur;
 840 #endif
 841
 842 /* If possible convert VALUE to a string with NDIGIT significant digits.
 843    Otherwise use exponential representation.  The resulting string will
 844    be written to BUF.  */
 845 extern char *gcvt (double __value, int __ndigit, char *__buf)
 846      __THROW __nonnull ((3)) __wur;
 847 # endif /* __UCLIBC_SUSV3_LEGACY__ */
 848
 849
 850 # if 0 /*def __USE_MISC*/
 851 /* Long double versions of above functions.  */
 852 extern char *qecvt (long double __value, int __ndigit,
 853                     int *__restrict __decpt, int *__restrict __sign)
 854      __THROW __nonnull ((3, 4)) __wur;
 855 extern char *qfcvt (long double __value, int __ndigit,
 856                     int *__restrict __decpt, int *__restrict __sign)
 857      __THROW __nonnull ((3, 4)) __wur;
 858 extern char *qgcvt (long double __value, int __ndigit, char *__buf)
 859      __THROW __nonnull ((3)) __wur;
 860
 861
 862 /* Reentrant version of the functions above which provide their own
 863    buffers.  */
 864 extern int ecvt_r (double __value, int __ndigit, int *__restrict __decpt,
 865                    int *__restrict __sign, char *__restrict __buf,
 866                    size_t __len) __THROW __nonnull ((3, 4, 5));
 867 extern int fcvt_r (double __value, int __ndigit, int *__restrict __decpt,
 868                    int *__restrict __sign, char *__restrict __buf,
 869                    size_t __len) __THROW __nonnull ((3, 4, 5));
 870
 871 extern int qecvt_r (long double __value, int __ndigit,
 872                     int *__restrict __decpt, int *__restrict __sign,
 873                     char *__restrict __buf, size_t __len)
 874      __THROW __nonnull ((3, 4, 5));
 875 extern int qfcvt_r (long double __value, int __ndigit,
 876                     int *__restrict __decpt, int *__restrict __sign,
 877                     char *__restrict __buf, size_t __len)
 878      __THROW __nonnull ((3, 4, 5));
 879 # endif /* misc */
 880 #endif  /* use MISC || use X/Open Unix */
 881
 882
 883 #ifdef __UCLIBC_HAS_WCHAR__
 884 __BEGIN_NAMESPACE_STD
 885 /* Return the length of the multibyte character
 886    in S, which is no longer than N.  */
 887 extern int mblen (const char *__s, size_t __n) __THROW __wur;
 888 /* Return the length of the given multibyte character,
 889    putting its `wchar_t' representation in *PWC.  */
 890 extern int mbtowc (wchar_t *__restrict __pwc,
 891                    const char *__restrict __s, size_t __n) __THROW __wur;
 892 /* Put the multibyte character represented
 893    by WCHAR in S, returning its length.  */
 894 extern int wctomb (char *__s, wchar_t __wchar) __THROW __wur;
 895
 896
 897 /* Convert a multibyte string to a wide char string.  */
 898 extern size_t mbstowcs (wchar_t *__restrict  __pwcs,
 899                         const char *__restrict __s, size_t __n) __THROW;
 900 /* Convert a wide char string to multibyte string.  */
 901 extern size_t wcstombs (char *__restrict __s,
 902                         const wchar_t *__restrict __pwcs, size_t __n)
 903      __THROW;
 904 __END_NAMESPACE_STD
 905 #endif /* __UCLIBC_HAS_WCHAR__ */
 906
 907
 908 #ifdef __USE_SVID
 909 /* Determine whether the string value of RESPONSE matches the affirmation
 910    or negative response expression as specified by the LC_MESSAGES category
 911    in the program's current locale.  Returns 1 if affirmative, 0 if
 912    negative, and -1 if not matching.  */
 913 extern int rpmatch (const char *__response) __THROW __nonnull ((1)) __wur;
 914 #endif
 915
 916
 917 #ifdef __USE_XOPEN_EXTENDED
 918 /* Parse comma separated suboption from *OPTIONP and match against
 919    strings in TOKENS.  If found return index and set *VALUEP to
 920    optional value introduced by an equal sign.  If the suboption is
 921    not part of TOKENS return in *VALUEP beginning of unknown
 922    suboption.  On exit *OPTIONP is set to the beginning of the next
 923    token or at the terminating NUL character.  */
 924 extern int getsubopt (char **__restrict __optionp,
 925                       char *const *__restrict __tokens,
 926                       char **__restrict __valuep)
 927      __THROW __nonnull ((1, 2, 3)) __wur;
 928 #endif
 929
 930
 931 #ifdef __USE_XOPEN
 932 # if defined __UCLIBC_HAS_CRYPT__
 933 /* Setup DES tables according KEY.  */
 934 extern void setkey (const char *__key) __THROW __nonnull ((1));
 935 # endif /* __UCLIBC_HAS_CRYPT__ */
 936 #endif
 937
 938
 939 /* X/Open pseudo terminal handling.  */
 940
 941 #ifdef __USE_XOPEN2K
 942 /* Return a master pseudo-terminal handle.  */
 943 extern int posix_openpt (int __oflag) __wur;
 944 #endif
 945
 946 #ifdef __USE_XOPEN
 947 /* The next four functions all take a master pseudo-tty fd and
 948    perform an operation on the associated slave:  */
 949
 950 #ifdef __UCLIBC_HAS_PTY__
 951 /* Chown the slave to the calling user.  */
 952 extern int grantpt (int __fd) __THROW;
 953
 954 /* Release an internal lock so the slave can be opened.
 955    Call after grantpt().  */
 956 extern int unlockpt (int __fd) __THROW;
 957
 958 /* Return the pathname of the pseudo terminal slave assoicated with
 959    the master FD is open on, or NULL on errors.
 960    The returned storage is good until the next call to this function.  */
 961 extern char *ptsname (int __fd) __THROW __wur;
 962 #endif /* __UCLIBC_HAS_PTY__ */
 963 #endif
 964
 965 #ifdef __USE_GNU
 966 # if defined __UCLIBC_HAS_PTY__
 967 /* Store at most BUFLEN characters of the pathname of the slave pseudo
 968    terminal associated with the master FD is open on in BUF.
 969    Return 0 on success, otherwise an error number.  */
 970 extern int ptsname_r (int __fd, char *__buf, size_t __buflen)
 971      __THROW __nonnull ((2));
 972 libc_hidden_proto(ptsname_r)
 973 # endif
 974 # if defined __UCLIBC_HAS_GETPT__
 975 /* Open a master pseudo terminal and return its file descriptor.  */
 976 extern int getpt (void);
 977 # endif
 978 #endif
 979
 980 #if 0 /* def __USE_BSD */
 981 /* Put the 1 minute, 5 minute and 15 minute load averages into the first
 982    NELEM elements of LOADAVG.  Return the number written (never more than
 983    three, but may be less than NELEM), or -1 if an error occurred.  */
 984 extern int getloadavg (double __loadavg[], int __nelem)
 985      __THROW __nonnull ((1));
 986 #endif
 987
 988 #ifdef __UCLIBC_HAS_ARC4RANDOM__
 989 # include <sys/types.h>
 990 extern u_int32_t arc4random(void);
 991 extern void arc4random_stir(void);
 992 extern void arc4random_addrandom(unsigned char *, int);
 993 #endif
 994
 995 #ifdef _LIBC
 996 extern int __drand48_iterate (unsigned short int xsubi[3], struct drand48_data *buffer) attribute_hidden;
 997
 998 /* Global state for non-reentrant functions.  */
 999 extern struct drand48_data __libc_drand48_data attribute_hidden;
1000 #endif
1001
1002 #endif /* don't just need malloc and calloc */
1003 #undef __need_malloc_and_calloc
1004
1005 __END_DECLS
1006
1007 #endif /* stdlib.h  */