The C and C++ Include Header Files
/usr/include/stdlib.h
$ cat -n /usr/include/stdlib.h 1 /* Copyright (C) 1991-2022 Free Software Foundation, Inc. 2 Copyright The GNU Toolchain Authors. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, see 17
. */ 18 19 /* 20 * ISO C99 Standard: 7.20 General utilities
21 */ 22 23 #ifndef _STDLIB_H 24 25 #define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION 26 #include
27 28 /* Get size_t, wchar_t and NULL from
. */ 29 #define __need_size_t 30 #define __need_wchar_t 31 #define __need_NULL 32 #include
33 34 __BEGIN_DECLS 35 36 #define _STDLIB_H 1 37 38 #if (defined __USE_XOPEN || defined __USE_XOPEN2K8) && !defined _SYS_WAIT_H 39 /* XPG requires a few symbols from
being defined. */ 40 # include
41 # include
42 43 /* Define the macros
also would define this way. */ 44 # define WEXITSTATUS(status) __WEXITSTATUS (status) 45 # define WTERMSIG(status) __WTERMSIG (status) 46 # define WSTOPSIG(status) __WSTOPSIG (status) 47 # define WIFEXITED(status) __WIFEXITED (status) 48 # define WIFSIGNALED(status) __WIFSIGNALED (status) 49 # define WIFSTOPPED(status) __WIFSTOPPED (status) 50 # ifdef __WIFCONTINUED 51 # define WIFCONTINUED(status) __WIFCONTINUED (status) 52 # endif 53 #endif /* X/Open or XPG7 and
not included. */ 54 55 /* _FloatN API tests for enablement. */ 56 #include
57 58 /* Returned by `div'. */ 59 typedef struct 60 { 61 int quot; /* Quotient. */ 62 int rem; /* Remainder. */ 63 } div_t; 64 65 /* Returned by `ldiv'. */ 66 #ifndef __ldiv_t_defined 67 typedef struct 68 { 69 long int quot; /* Quotient. */ 70 long int rem; /* Remainder. */ 71 } ldiv_t; 72 # define __ldiv_t_defined 1 73 #endif 74 75 #if defined __USE_ISOC99 && !defined __lldiv_t_defined 76 /* Returned by `lldiv'. */ 77 __extension__ typedef struct 78 { 79 long long int quot; /* Quotient. */ 80 long long int rem; /* Remainder. */ 81 } lldiv_t; 82 # define __lldiv_t_defined 1 83 #endif 84 85 86 /* The largest number rand will return (same as INT_MAX). */ 87 #define RAND_MAX 2147483647 88 89 90 /* We define these the same for all machines. 91 Changes from this to the outside world should be done in `_exit'. */ 92 #define EXIT_FAILURE 1 /* Failing exit status. */ 93 #define EXIT_SUCCESS 0 /* Successful exit status. */ 94 95 96 /* Maximum length of a multibyte character in the current locale. */ 97 #define MB_CUR_MAX (__ctype_get_mb_cur_max ()) 98 extern size_t __ctype_get_mb_cur_max (void) __THROW __wur; 99 100 101 /* Convert a string to a floating-point number. */ 102 extern double atof (const char *__nptr) 103 __THROW __attribute_pure__ __nonnull ((1)) __wur; 104 /* Convert a string to an integer. */ 105 extern int atoi (const char *__nptr) 106 __THROW __attribute_pure__ __nonnull ((1)) __wur; 107 /* Convert a string to a long integer. */ 108 extern long int atol (const char *__nptr) 109 __THROW __attribute_pure__ __nonnull ((1)) __wur; 110 111 #ifdef __USE_ISOC99 112 /* Convert a string to a long long integer. */ 113 __extension__ extern long long int atoll (const char *__nptr) 114 __THROW __attribute_pure__ __nonnull ((1)) __wur; 115 #endif 116 117 /* Convert a string to a floating-point number. */ 118 extern double strtod (const char *__restrict __nptr, 119 char **__restrict __endptr) 120 __THROW __nonnull ((1)); 121 122 #ifdef __USE_ISOC99 123 /* Likewise for `float' and `long double' sizes of floating-point numbers. */ 124 extern float strtof (const char *__restrict __nptr, 125 char **__restrict __endptr) __THROW __nonnull ((1)); 126 127 extern long double strtold (const char *__restrict __nptr, 128 char **__restrict __endptr) 129 __THROW __nonnull ((1)); 130 #endif 131 132 /* Likewise for '_FloatN' and '_FloatNx'. */ 133 134 #if __HAVE_FLOAT16 && __GLIBC_USE (IEC_60559_TYPES_EXT) 135 extern _Float16 strtof16 (const char *__restrict __nptr, 136 char **__restrict __endptr) 137 __THROW __nonnull ((1)); 138 #endif 139 140 #if __HAVE_FLOAT32 && __GLIBC_USE (IEC_60559_TYPES_EXT) 141 extern _Float32 strtof32 (const char *__restrict __nptr, 142 char **__restrict __endptr) 143 __THROW __nonnull ((1)); 144 #endif 145 146 #if __HAVE_FLOAT64 && __GLIBC_USE (IEC_60559_TYPES_EXT) 147 extern _Float64 strtof64 (const char *__restrict __nptr, 148 char **__restrict __endptr) 149 __THROW __nonnull ((1)); 150 #endif 151 152 #if __HAVE_FLOAT128 && __GLIBC_USE (IEC_60559_TYPES_EXT) 153 extern _Float128 strtof128 (const char *__restrict __nptr, 154 char **__restrict __endptr) 155 __THROW __nonnull ((1)); 156 #endif 157 158 #if __HAVE_FLOAT32X && __GLIBC_USE (IEC_60559_TYPES_EXT) 159 extern _Float32x strtof32x (const char *__restrict __nptr, 160 char **__restrict __endptr) 161 __THROW __nonnull ((1)); 162 #endif 163 164 #if __HAVE_FLOAT64X && __GLIBC_USE (IEC_60559_TYPES_EXT) 165 extern _Float64x strtof64x (const char *__restrict __nptr, 166 char **__restrict __endptr) 167 __THROW __nonnull ((1)); 168 #endif 169 170 #if __HAVE_FLOAT128X && __GLIBC_USE (IEC_60559_TYPES_EXT) 171 extern _Float128x strtof128x (const char *__restrict __nptr, 172 char **__restrict __endptr) 173 __THROW __nonnull ((1)); 174 #endif 175 176 /* Convert a string to a long integer. */ 177 extern long int strtol (const char *__restrict __nptr, 178 char **__restrict __endptr, int __base) 179 __THROW __nonnull ((1)); 180 /* Convert a string to an unsigned long integer. */ 181 extern unsigned long int strtoul (const char *__restrict __nptr, 182 char **__restrict __endptr, int __base) 183 __THROW __nonnull ((1)); 184 185 #ifdef __USE_MISC 186 /* Convert a string to a quadword integer. */ 187 __extension__ 188 extern long long int strtoq (const char *__restrict __nptr, 189 char **__restrict __endptr, int __base) 190 __THROW __nonnull ((1)); 191 /* Convert a string to an unsigned quadword integer. */ 192 __extension__ 193 extern unsigned long long int strtouq (const char *__restrict __nptr, 194 char **__restrict __endptr, int __base) 195 __THROW __nonnull ((1)); 196 #endif /* Use misc. */ 197 198 #ifdef __USE_ISOC99 199 /* Convert a string to a quadword integer. */ 200 __extension__ 201 extern long long int strtoll (const char *__restrict __nptr, 202 char **__restrict __endptr, int __base) 203 __THROW __nonnull ((1)); 204 /* Convert a string to an unsigned quadword integer. */ 205 __extension__ 206 extern unsigned long long int strtoull (const char *__restrict __nptr, 207 char **__restrict __endptr, int __base) 208 __THROW __nonnull ((1)); 209 #endif /* ISO C99 or use MISC. */ 210 211 /* Convert a floating-point number to a string. */ 212 #if __GLIBC_USE (IEC_60559_BFP_EXT_C2X) 213 extern int strfromd (char *__dest, size_t __size, const char *__format, 214 double __f) 215 __THROW __nonnull ((3)); 216 217 extern int strfromf (char *__dest, size_t __size, const char *__format, 218 float __f) 219 __THROW __nonnull ((3)); 220 221 extern int strfroml (char *__dest, size_t __size, const char *__format, 222 long double __f) 223 __THROW __nonnull ((3)); 224 #endif 225 226 #if __HAVE_FLOAT16 && __GLIBC_USE (IEC_60559_TYPES_EXT) 227 extern int strfromf16 (char *__dest, size_t __size, const char * __format, 228 _Float16 __f) 229 __THROW __nonnull ((3)); 230 #endif 231 232 #if __HAVE_FLOAT32 && __GLIBC_USE (IEC_60559_TYPES_EXT) 233 extern int strfromf32 (char *__dest, size_t __size, const char * __format, 234 _Float32 __f) 235 __THROW __nonnull ((3)); 236 #endif 237 238 #if __HAVE_FLOAT64 && __GLIBC_USE (IEC_60559_TYPES_EXT) 239 extern int strfromf64 (char *__dest, size_t __size, const char * __format, 240 _Float64 __f) 241 __THROW __nonnull ((3)); 242 #endif 243 244 #if __HAVE_FLOAT128 && __GLIBC_USE (IEC_60559_TYPES_EXT) 245 extern int strfromf128 (char *__dest, size_t __size, const char * __format, 246 _Float128 __f) 247 __THROW __nonnull ((3)); 248 #endif 249 250 #if __HAVE_FLOAT32X && __GLIBC_USE (IEC_60559_TYPES_EXT) 251 extern int strfromf32x (char *__dest, size_t __size, const char * __format, 252 _Float32x __f) 253 __THROW __nonnull ((3)); 254 #endif 255 256 #if __HAVE_FLOAT64X && __GLIBC_USE (IEC_60559_TYPES_EXT) 257 extern int strfromf64x (char *__dest, size_t __size, const char * __format, 258 _Float64x __f) 259 __THROW __nonnull ((3)); 260 #endif 261 262 #if __HAVE_FLOAT128X && __GLIBC_USE (IEC_60559_TYPES_EXT) 263 extern int strfromf128x (char *__dest, size_t __size, const char * __format, 264 _Float128x __f) 265 __THROW __nonnull ((3)); 266 #endif 267 268 269 #ifdef __USE_GNU 270 /* Parallel versions of the functions above which take the locale to 271 use as an additional parameter. These are GNU extensions inspired 272 by the POSIX.1-2008 extended locale API. */ 273 # include
274 275 extern long int strtol_l (const char *__restrict __nptr, 276 char **__restrict __endptr, int __base, 277 locale_t __loc) __THROW __nonnull ((1, 4)); 278 279 extern unsigned long int strtoul_l (const char *__restrict __nptr, 280 char **__restrict __endptr, 281 int __base, locale_t __loc) 282 __THROW __nonnull ((1, 4)); 283 284 __extension__ 285 extern long long int strtoll_l (const char *__restrict __nptr, 286 char **__restrict __endptr, int __base, 287 locale_t __loc) 288 __THROW __nonnull ((1, 4)); 289 290 __extension__ 291 extern unsigned long long int strtoull_l (const char *__restrict __nptr, 292 char **__restrict __endptr, 293 int __base, locale_t __loc) 294 __THROW __nonnull ((1, 4)); 295 296 extern double strtod_l (const char *__restrict __nptr, 297 char **__restrict __endptr, locale_t __loc) 298 __THROW __nonnull ((1, 3)); 299 300 extern float strtof_l (const char *__restrict __nptr, 301 char **__restrict __endptr, locale_t __loc) 302 __THROW __nonnull ((1, 3)); 303 304 extern long double strtold_l (const char *__restrict __nptr, 305 char **__restrict __endptr, 306 locale_t __loc) 307 __THROW __nonnull ((1, 3)); 308 309 # if __HAVE_FLOAT16 310 extern _Float16 strtof16_l (const char *__restrict __nptr, 311 char **__restrict __endptr, 312 locale_t __loc) 313 __THROW __nonnull ((1, 3)); 314 # endif 315 316 # if __HAVE_FLOAT32 317 extern _Float32 strtof32_l (const char *__restrict __nptr, 318 char **__restrict __endptr, 319 locale_t __loc) 320 __THROW __nonnull ((1, 3)); 321 # endif 322 323 # if __HAVE_FLOAT64 324 extern _Float64 strtof64_l (const char *__restrict __nptr, 325 char **__restrict __endptr, 326 locale_t __loc) 327 __THROW __nonnull ((1, 3)); 328 # endif 329 330 # if __HAVE_FLOAT128 331 extern _Float128 strtof128_l (const char *__restrict __nptr, 332 char **__restrict __endptr, 333 locale_t __loc) 334 __THROW __nonnull ((1, 3)); 335 # endif 336 337 # if __HAVE_FLOAT32X 338 extern _Float32x strtof32x_l (const char *__restrict __nptr, 339 char **__restrict __endptr, 340 locale_t __loc) 341 __THROW __nonnull ((1, 3)); 342 # endif 343 344 # if __HAVE_FLOAT64X 345 extern _Float64x strtof64x_l (const char *__restrict __nptr, 346 char **__restrict __endptr, 347 locale_t __loc) 348 __THROW __nonnull ((1, 3)); 349 # endif 350 351 # if __HAVE_FLOAT128X 352 extern _Float128x strtof128x_l (const char *__restrict __nptr, 353 char **__restrict __endptr, 354 locale_t __loc) 355 __THROW __nonnull ((1, 3)); 356 # endif 357 #endif /* GNU */ 358 359 360 #ifdef __USE_EXTERN_INLINES 361 __extern_inline int 362 __NTH (atoi (const char *__nptr)) 363 { 364 return (int) strtol (__nptr, (char **) NULL, 10); 365 } 366 __extern_inline long int 367 __NTH (atol (const char *__nptr)) 368 { 369 return strtol (__nptr, (char **) NULL, 10); 370 } 371 372 # ifdef __USE_ISOC99 373 __extension__ __extern_inline long long int 374 __NTH (atoll (const char *__nptr)) 375 { 376 return strtoll (__nptr, (char **) NULL, 10); 377 } 378 # endif 379 #endif /* Optimizing and Inlining. */ 380 381 382 #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED 383 /* Convert N to base 64 using the digits "./0-9A-Za-z", least-significant 384 digit first. Returns a pointer to static storage overwritten by the 385 next call. */ 386 extern char *l64a (long int __n) __THROW __wur; 387 388 /* Read a number from a string S in base 64 as above. */ 389 extern long int a64l (const char *__s) 390 __THROW __attribute_pure__ __nonnull ((1)) __wur; 391 392 #endif /* Use misc || extended X/Open. */ 393 394 #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED 395 # include
/* we need int32_t... */ 396 397 /* These are the functions that actually do things. The `random', `srandom', 398 `initstate' and `setstate' functions are those from BSD Unices. 399 The `rand' and `srand' functions are required by the ANSI standard. 400 We provide both interfaces to the same random number generator. */ 401 /* Return a random long integer between 0 and 2^31-1 inclusive. */ 402 extern long int random (void) __THROW; 403 404 /* Seed the random number generator with the given number. */ 405 extern void srandom (unsigned int __seed) __THROW; 406 407 /* Initialize the random number generator to use state buffer STATEBUF, 408 of length STATELEN, and seed it with SEED. Optimal lengths are 8, 16, 409 32, 64, 128 and 256, the bigger the better; values less than 8 will 410 cause an error and values greater than 256 will be rounded down. */ 411 extern char *initstate (unsigned int __seed, char *__statebuf, 412 size_t __statelen) __THROW __nonnull ((2)); 413 414 /* Switch the random number generator to state buffer STATEBUF, 415 which should have been previously initialized by `initstate'. */ 416 extern char *setstate (char *__statebuf) __THROW __nonnull ((1)); 417 418 419 # ifdef __USE_MISC 420 /* Reentrant versions of the `random' family of functions. 421 These functions all use the following data structure to contain 422 state, rather than global state variables. */ 423 424 struct random_data 425 { 426 int32_t *fptr; /* Front pointer. */ 427 int32_t *rptr; /* Rear pointer. */ 428 int32_t *state; /* Array of state values. */ 429 int rand_type; /* Type of random number generator. */ 430 int rand_deg; /* Degree of random number generator. */ 431 int rand_sep; /* Distance between front and rear. */ 432 int32_t *end_ptr; /* Pointer behind state table. */ 433 }; 434 435 extern int random_r (struct random_data *__restrict __buf, 436 int32_t *__restrict __result) __THROW __nonnull ((1, 2)); 437 438 extern int srandom_r (unsigned int __seed, struct random_data *__buf) 439 __THROW __nonnull ((2)); 440 441 extern int initstate_r (unsigned int __seed, char *__restrict __statebuf, 442 size_t __statelen, 443 struct random_data *__restrict __buf) 444 __THROW __nonnull ((2, 4)); 445 446 extern int setstate_r (char *__restrict __statebuf, 447 struct random_data *__restrict __buf) 448 __THROW __nonnull ((1, 2)); 449 # endif /* Use misc. */ 450 #endif /* Use extended X/Open || misc. */ 451 452 453 /* Return a random integer between 0 and RAND_MAX inclusive. */ 454 extern int rand (void) __THROW; 455 /* Seed the random number generator with the given number. */ 456 extern void srand (unsigned int __seed) __THROW; 457 458 #ifdef __USE_POSIX199506 459 /* Reentrant interface according to POSIX.1. */ 460 extern int rand_r (unsigned int *__seed) __THROW; 461 #endif 462 463 464 #if defined __USE_MISC || defined __USE_XOPEN 465 /* System V style 48-bit random number generator functions. */ 466 467 /* Return non-negative, double-precision floating-point value in [0.0,1.0). */ 468 extern double drand48 (void) __THROW; 469 extern double erand48 (unsigned short int __xsubi[3]) __THROW __nonnull ((1)); 470 471 /* Return non-negative, long integer in [0,2^31). */ 472 extern long int lrand48 (void) __THROW; 473 extern long int nrand48 (unsigned short int __xsubi[3]) 474 __THROW __nonnull ((1)); 475 476 /* Return signed, long integers in [-2^31,2^31). */ 477 extern long int mrand48 (void) __THROW; 478 extern long int jrand48 (unsigned short int __xsubi[3]) 479 __THROW __nonnull ((1)); 480 481 /* Seed random number generator. */ 482 extern void srand48 (long int __seedval) __THROW; 483 extern unsigned short int *seed48 (unsigned short int __seed16v[3]) 484 __THROW __nonnull ((1)); 485 extern void lcong48 (unsigned short int __param[7]) __THROW __nonnull ((1)); 486 487 # ifdef __USE_MISC 488 /* Data structure for communication with thread safe versions. This 489 type is to be regarded as opaque. It's only exported because users 490 have to allocate objects of this type. */ 491 struct drand48_data 492 { 493 unsigned short int __x[3]; /* Current state. */ 494 unsigned short int __old_x[3]; /* Old state. */ 495 unsigned short int __c; /* Additive const. in congruential formula. */ 496 unsigned short int __init; /* Flag for initializing. */ 497 __extension__ unsigned long long int __a; /* Factor in congruential 498 formula. */ 499 }; 500 501 /* Return non-negative, double-precision floating-point value in [0.0,1.0). */ 502 extern int drand48_r (struct drand48_data *__restrict __buffer, 503 double *__restrict __result) __THROW __nonnull ((1, 2)); 504 extern int erand48_r (unsigned short int __xsubi[3], 505 struct drand48_data *__restrict __buffer, 506 double *__restrict __result) __THROW __nonnull ((1, 2)); 507 508 /* Return non-negative, long integer in [0,2^31). */ 509 extern int lrand48_r (struct drand48_data *__restrict __buffer, 510 long int *__restrict __result) 511 __THROW __nonnull ((1, 2)); 512 extern int nrand48_r (unsigned short int __xsubi[3], 513 struct drand48_data *__restrict __buffer, 514 long int *__restrict __result) 515 __THROW __nonnull ((1, 2)); 516 517 /* Return signed, long integers in [-2^31,2^31). */ 518 extern int mrand48_r (struct drand48_data *__restrict __buffer, 519 long int *__restrict __result) 520 __THROW __nonnull ((1, 2)); 521 extern int jrand48_r (unsigned short int __xsubi[3], 522 struct drand48_data *__restrict __buffer, 523 long int *__restrict __result) 524 __THROW __nonnull ((1, 2)); 525 526 /* Seed random number generator. */ 527 extern int srand48_r (long int __seedval, struct drand48_data *__buffer) 528 __THROW __nonnull ((2)); 529 530 extern int seed48_r (unsigned short int __seed16v[3], 531 struct drand48_data *__buffer) __THROW __nonnull ((1, 2)); 532 533 extern int lcong48_r (unsigned short int __param[7], 534 struct drand48_data *__buffer) 535 __THROW __nonnull ((1, 2)); 536 # endif /* Use misc. */ 537 #endif /* Use misc or X/Open. */ 538 539 /* Allocate SIZE bytes of memory. */ 540 extern void *malloc (size_t __size) __THROW __attribute_malloc__ 541 __attribute_alloc_size__ ((1)) __wur; 542 /* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */ 543 extern void *calloc (size_t __nmemb, size_t __size) 544 __THROW __attribute_malloc__ __attribute_alloc_size__ ((1, 2)) __wur; 545 546 /* Re-allocate the previously allocated block 547 in PTR, making the new block SIZE bytes long. */ 548 /* __attribute_malloc__ is not used, because if realloc returns 549 the same pointer that was passed to it, aliasing needs to be allowed 550 between objects pointed by the old and new pointers. */ 551 extern void *realloc (void *__ptr, size_t __size) 552 __THROW __attribute_warn_unused_result__ __attribute_alloc_size__ ((2)); 553 554 /* Free a block allocated by `malloc', `realloc' or `calloc'. */ 555 extern void free (void *__ptr) __THROW; 556 557 #ifdef __USE_MISC 558 /* Re-allocate the previously allocated block in PTR, making the new 559 block large enough for NMEMB elements of SIZE bytes each. */ 560 /* __attribute_malloc__ is not used, because if reallocarray returns 561 the same pointer that was passed to it, aliasing needs to be allowed 562 between objects pointed by the old and new pointers. */ 563 extern void *reallocarray (void *__ptr, size_t __nmemb, size_t __size) 564 __THROW __attribute_warn_unused_result__ 565 __attribute_alloc_size__ ((2, 3)) 566 __attr_dealloc_free; 567 568 /* Add reallocarray as its own deallocator. */ 569 extern void *reallocarray (void *__ptr, size_t __nmemb, size_t __size) 570 __THROW __attr_dealloc (reallocarray, 1); 571 #endif 572 573 #ifdef __USE_MISC 574 # include
575 #endif /* Use misc. */ 576 577 #if (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K) \ 578 || defined __USE_MISC 579 /* Allocate SIZE bytes on a page boundary. The storage cannot be freed. */ 580 extern void *valloc (size_t __size) __THROW __attribute_malloc__ 581 __attribute_alloc_size__ ((1)) __wur; 582 #endif 583 584 #ifdef __USE_XOPEN2K 585 /* Allocate memory of SIZE bytes with an alignment of ALIGNMENT. */ 586 extern int posix_memalign (void **__memptr, size_t __alignment, size_t __size) 587 __THROW __nonnull ((1)) __wur; 588 #endif 589 590 #ifdef __USE_ISOC11 591 /* ISO C variant of aligned allocation. */ 592 extern void *aligned_alloc (size_t __alignment, size_t __size) 593 __THROW __attribute_malloc__ __attribute_alloc_align__ ((1)) 594 __attribute_alloc_size__ ((2)) __wur; 595 #endif 596 597 /* Abort execution and generate a core-dump. */ 598 extern void abort (void) __THROW __attribute__ ((__noreturn__)); 599 600 601 /* Register a function to be called when `exit' is called. */ 602 extern int atexit (void (*__func) (void)) __THROW __nonnull ((1)); 603 604 #if defined __USE_ISOC11 || defined __USE_ISOCXX11 605 /* Register a function to be called when `quick_exit' is called. */ 606 # ifdef __cplusplus 607 extern "C++" int at_quick_exit (void (*__func) (void)) 608 __THROW __asm ("at_quick_exit") __nonnull ((1)); 609 # else 610 extern int at_quick_exit (void (*__func) (void)) __THROW __nonnull ((1)); 611 # endif 612 #endif 613 614 #ifdef __USE_MISC 615 /* Register a function to be called with the status 616 given to `exit' and the given argument. */ 617 extern int on_exit (void (*__func) (int __status, void *__arg), void *__arg) 618 __THROW __nonnull ((1)); 619 #endif 620 621 /* Call all functions registered with `atexit' and `on_exit', 622 in the reverse of the order in which they were registered, 623 perform stdio cleanup, and terminate program execution with STATUS. */ 624 extern void exit (int __status) __THROW __attribute__ ((__noreturn__)); 625 626 #if defined __USE_ISOC11 || defined __USE_ISOCXX11 627 /* Call all functions registered with `at_quick_exit' in the reverse 628 of the order in which they were registered and terminate program 629 execution with STATUS. */ 630 extern void quick_exit (int __status) __THROW __attribute__ ((__noreturn__)); 631 #endif 632 633 #ifdef __USE_ISOC99 634 /* Terminate the program with STATUS without calling any of the 635 functions registered with `atexit' or `on_exit'. */ 636 extern void _Exit (int __status) __THROW __attribute__ ((__noreturn__)); 637 #endif 638 639 640 /* Return the value of envariable NAME, or NULL if it doesn't exist. */ 641 extern char *getenv (const char *__name) __THROW __nonnull ((1)) __wur; 642 643 #ifdef __USE_GNU 644 /* This function is similar to the above but returns NULL if the 645 programs is running with SUID or SGID enabled. */ 646 extern char *secure_getenv (const char *__name) 647 __THROW __nonnull ((1)) __wur; 648 #endif 649 650 #if defined __USE_MISC || defined __USE_XOPEN 651 /* The SVID says this is in
, but this seems a better place. */ 652 /* Put STRING, which is of the form "NAME=VALUE", in the environment. 653 If there is no `=', remove NAME from the environment. */ 654 extern int putenv (char *__string) __THROW __nonnull ((1)); 655 #endif 656 657 #ifdef __USE_XOPEN2K 658 /* Set NAME to VALUE in the environment. 659 If REPLACE is nonzero, overwrite an existing value. */ 660 extern int setenv (const char *__name, const char *__value, int __replace) 661 __THROW __nonnull ((2)); 662 663 /* Remove the variable NAME from the environment. */ 664 extern int unsetenv (const char *__name) __THROW __nonnull ((1)); 665 #endif 666 667 #ifdef __USE_MISC 668 /* The `clearenv' was planned to be added to POSIX.1 but probably 669 never made it. Nevertheless the POSIX.9 standard (POSIX bindings 670 for Fortran 77) requires this function. */ 671 extern int clearenv (void) __THROW; 672 #endif 673 674 675 #if defined __USE_MISC \ 676 || (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K8) 677 /* Generate a unique temporary file name from TEMPLATE. 678 The last six characters of TEMPLATE must be "XXXXXX"; 679 they are replaced with a string that makes the file name unique. 680 Always returns TEMPLATE, it's either a temporary file name or a null 681 string if it cannot get a unique file name. */ 682 extern char *mktemp (char *__template) __THROW __nonnull ((1)); 683 #endif 684 685 #if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8 686 /* Generate a unique temporary file name from TEMPLATE. 687 The last six characters of TEMPLATE must be "XXXXXX"; 688 they are replaced with a string that makes the filename unique. 689 Returns a file descriptor open on the file for reading and writing, 690 or -1 if it cannot create a uniquely-named file. 691 692 This function is a possible cancellation point and therefore not 693 marked with __THROW. */ 694 # ifndef __USE_FILE_OFFSET64 695 extern int mkstemp (char *__template) __nonnull ((1)) __wur; 696 # else 697 # ifdef __REDIRECT 698 extern int __REDIRECT (mkstemp, (char *__template), mkstemp64) 699 __nonnull ((1)) __wur; 700 # else 701 # define mkstemp mkstemp64 702 # endif 703 # endif 704 # ifdef __USE_LARGEFILE64 705 extern int mkstemp64 (char *__template) __nonnull ((1)) __wur; 706 # endif 707 #endif 708 709 #ifdef __USE_MISC 710 /* Similar to mkstemp, but the template can have a suffix after the 711 XXXXXX. The length of the suffix is specified in the second 712 parameter. 713 714 This function is a possible cancellation point and therefore not 715 marked with __THROW. */ 716 # ifndef __USE_FILE_OFFSET64 717 extern int mkstemps (char *__template, int __suffixlen) __nonnull ((1)) __wur; 718 # else 719 # ifdef __REDIRECT 720 extern int __REDIRECT (mkstemps, (char *__template, int __suffixlen), 721 mkstemps64) __nonnull ((1)) __wur; 722 # else 723 # define mkstemps mkstemps64 724 # endif 725 # endif 726 # ifdef __USE_LARGEFILE64 727 extern int mkstemps64 (char *__template, int __suffixlen) 728 __nonnull ((1)) __wur; 729 # endif 730 #endif 731 732 #ifdef __USE_XOPEN2K8 733 /* Create a unique temporary directory from TEMPLATE. 734 The last six characters of TEMPLATE must be "XXXXXX"; 735 they are replaced with a string that makes the directory name unique. 736 Returns TEMPLATE, or a null pointer if it cannot get a unique name. 737 The directory is created mode 700. */ 738 extern char *mkdtemp (char *__template) __THROW __nonnull ((1)) __wur; 739 #endif 740 741 #ifdef __USE_GNU 742 /* Generate a unique temporary file name from TEMPLATE similar to 743 mkstemp. But allow the caller to pass additional flags which are 744 used in the open call to create the file.. 745 746 This function is a possible cancellation point and therefore not 747 marked with __THROW. */ 748 # ifndef __USE_FILE_OFFSET64 749 extern int mkostemp (char *__template, int __flags) __nonnull ((1)) __wur; 750 # else 751 # ifdef __REDIRECT 752 extern int __REDIRECT (mkostemp, (char *__template, int __flags), mkostemp64) 753 __nonnull ((1)) __wur; 754 # else 755 # define mkostemp mkostemp64 756 # endif 757 # endif 758 # ifdef __USE_LARGEFILE64 759 extern int mkostemp64 (char *__template, int __flags) __nonnull ((1)) __wur; 760 # endif 761 762 /* Similar to mkostemp, but the template can have a suffix after the 763 XXXXXX. The length of the suffix is specified in the second 764 parameter. 765 766 This function is a possible cancellation point and therefore not 767 marked with __THROW. */ 768 # ifndef __USE_FILE_OFFSET64 769 extern int mkostemps (char *__template, int __suffixlen, int __flags) 770 __nonnull ((1)) __wur; 771 # else 772 # ifdef __REDIRECT 773 extern int __REDIRECT (mkostemps, (char *__template, int __suffixlen, 774 int __flags), mkostemps64) 775 __nonnull ((1)) __wur; 776 # else 777 # define mkostemps mkostemps64 778 # endif 779 # endif 780 # ifdef __USE_LARGEFILE64 781 extern int mkostemps64 (char *__template, int __suffixlen, int __flags) 782 __nonnull ((1)) __wur; 783 # endif 784 #endif 785 786 787 /* Execute the given line as a shell command. 788 789 This function is a cancellation point and therefore not marked with 790 __THROW. */ 791 extern int system (const char *__command) __wur; 792 793 794 #ifdef __USE_GNU 795 /* Return a malloc'd string containing the canonical absolute name of the 796 existing named file. */ 797 extern char *canonicalize_file_name (const char *__name) 798 __THROW __nonnull ((1)) __attribute_malloc__ 799 __attr_dealloc_free __wur; 800 #endif 801 802 #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED 803 /* Return the canonical absolute name of file NAME. If RESOLVED is 804 null, the result is malloc'd; otherwise, if the canonical name is 805 PATH_MAX chars or more, returns null with `errno' set to 806 ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars, 807 returns the name in RESOLVED. */ 808 extern char *realpath (const char *__restrict __name, 809 char *__restrict __resolved) __THROW __wur; 810 #endif 811 812 813 /* Shorthand for type of comparison functions. */ 814 #ifndef __COMPAR_FN_T 815 # define __COMPAR_FN_T 816 typedef int (*__compar_fn_t) (const void *, const void *); 817 818 # ifdef __USE_GNU 819 typedef __compar_fn_t comparison_fn_t; 820 # endif 821 #endif 822 #ifdef __USE_GNU 823 typedef int (*__compar_d_fn_t) (const void *, const void *, void *); 824 #endif 825 826 /* Do a binary search for KEY in BASE, which consists of NMEMB elements 827 of SIZE bytes each, using COMPAR to perform the comparisons. */ 828 extern void *bsearch (const void *__key, const void *__base, 829 size_t __nmemb, size_t __size, __compar_fn_t __compar) 830 __nonnull ((1, 2, 5)) __wur; 831 832 #ifdef __USE_EXTERN_INLINES 833 # include
834 #endif 835 836 /* Sort NMEMB elements of BASE, of SIZE bytes each, 837 using COMPAR to perform the comparisons. */ 838 extern void qsort (void *__base, size_t __nmemb, size_t __size, 839 __compar_fn_t __compar) __nonnull ((1, 4)); 840 #ifdef __USE_GNU 841 extern void qsort_r (void *__base, size_t __nmemb, size_t __size, 842 __compar_d_fn_t __compar, void *__arg) 843 __nonnull ((1, 4)); 844 #endif 845 846 847 /* Return the absolute value of X. */ 848 extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur; 849 extern long int labs (long int __x) __THROW __attribute__ ((__const__)) __wur; 850 851 #ifdef __USE_ISOC99 852 __extension__ extern long long int llabs (long long int __x) 853 __THROW __attribute__ ((__const__)) __wur; 854 #endif 855 856 857 /* Return the `div_t', `ldiv_t' or `lldiv_t' representation 858 of the value of NUMER over DENOM. */ 859 /* GCC may have built-ins for these someday. */ 860 extern div_t div (int __numer, int __denom) 861 __THROW __attribute__ ((__const__)) __wur; 862 extern ldiv_t ldiv (long int __numer, long int __denom) 863 __THROW __attribute__ ((__const__)) __wur; 864 865 #ifdef __USE_ISOC99 866 __extension__ extern lldiv_t lldiv (long long int __numer, 867 long long int __denom) 868 __THROW __attribute__ ((__const__)) __wur; 869 #endif 870 871 872 #if (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K8) \ 873 || defined __USE_MISC 874 /* Convert floating point numbers to strings. The returned values are 875 valid only until another call to the same function. */ 876 877 /* Convert VALUE to a string with NDIGIT digits and return a pointer to 878 this. Set *DECPT with the position of the decimal character and *SIGN 879 with the sign of the number. */ 880 extern char *ecvt (double __value, int __ndigit, int *__restrict __decpt, 881 int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur; 882 883 /* Convert VALUE to a string rounded to NDIGIT decimal digits. Set *DECPT 884 with the position of the decimal character and *SIGN with the sign of 885 the number. */ 886 extern char *fcvt (double __value, int __ndigit, int *__restrict __decpt, 887 int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur; 888 889 /* If possible convert VALUE to a string with NDIGIT significant digits. 890 Otherwise use exponential representation. The resulting string will 891 be written to BUF. */ 892 extern char *gcvt (double __value, int __ndigit, char *__buf) 893 __THROW __nonnull ((3)) __wur; 894 #endif 895 896 #ifdef __USE_MISC 897 /* Long double versions of above functions. */ 898 extern char *qecvt (long double __value, int __ndigit, 899 int *__restrict __decpt, int *__restrict __sign) 900 __THROW __nonnull ((3, 4)) __wur; 901 extern char *qfcvt (long double __value, int __ndigit, 902 int *__restrict __decpt, int *__restrict __sign) 903 __THROW __nonnull ((3, 4)) __wur; 904 extern char *qgcvt (long double __value, int __ndigit, char *__buf) 905 __THROW __nonnull ((3)) __wur; 906 907 908 /* Reentrant version of the functions above which provide their own 909 buffers. */ 910 extern int ecvt_r (double __value, int __ndigit, int *__restrict __decpt, 911 int *__restrict __sign, char *__restrict __buf, 912 size_t __len) __THROW __nonnull ((3, 4, 5)); 913 extern int fcvt_r (double __value, int __ndigit, int *__restrict __decpt, 914 int *__restrict __sign, char *__restrict __buf, 915 size_t __len) __THROW __nonnull ((3, 4, 5)); 916 917 extern int qecvt_r (long double __value, int __ndigit, 918 int *__restrict __decpt, int *__restrict __sign, 919 char *__restrict __buf, size_t __len) 920 __THROW __nonnull ((3, 4, 5)); 921 extern int qfcvt_r (long double __value, int __ndigit, 922 int *__restrict __decpt, int *__restrict __sign, 923 char *__restrict __buf, size_t __len) 924 __THROW __nonnull ((3, 4, 5)); 925 #endif /* misc */ 926 927 928 /* Return the length of the multibyte character 929 in S, which is no longer than N. */ 930 extern int mblen (const char *__s, size_t __n) __THROW; 931 /* Return the length of the given multibyte character, 932 putting its `wchar_t' representation in *PWC. */ 933 extern int mbtowc (wchar_t *__restrict __pwc, 934 const char *__restrict __s, size_t __n) __THROW; 935 /* Put the multibyte character represented 936 by WCHAR in S, returning its length. */ 937 extern int wctomb (char *__s, wchar_t __wchar) __THROW; 938 939 940 /* Convert a multibyte string to a wide char string. */ 941 extern size_t mbstowcs (wchar_t *__restrict __pwcs, 942 const char *__restrict __s, size_t __n) __THROW 943 __attr_access ((__read_only__, 2)); 944 /* Convert a wide char string to multibyte string. */ 945 extern size_t wcstombs (char *__restrict __s, 946 const wchar_t *__restrict __pwcs, size_t __n) 947 __THROW 948 __fortified_attr_access (__write_only__, 1, 3) 949 __attr_access ((__read_only__, 2)); 950 951 #ifdef __USE_MISC 952 /* Determine whether the string value of RESPONSE matches the affirmation 953 or negative response expression as specified by the LC_MESSAGES category 954 in the program's current locale. Returns 1 if affirmative, 0 if 955 negative, and -1 if not matching. */ 956 extern int rpmatch (const char *__response) __THROW __nonnull ((1)) __wur; 957 #endif 958 959 960 #if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8 961 /* Parse comma separated suboption from *OPTIONP and match against 962 strings in TOKENS. If found return index and set *VALUEP to 963 optional value introduced by an equal sign. If the suboption is 964 not part of TOKENS return in *VALUEP beginning of unknown 965 suboption. On exit *OPTIONP is set to the beginning of the next 966 token or at the terminating NUL character. */ 967 extern int getsubopt (char **__restrict __optionp, 968 char *const *__restrict __tokens, 969 char **__restrict __valuep) 970 __THROW __nonnull ((1, 2, 3)) __wur; 971 #endif 972 973 974 /* X/Open pseudo terminal handling. */ 975 976 #ifdef __USE_XOPEN2KXSI 977 /* Return a master pseudo-terminal handle. */ 978 extern int posix_openpt (int __oflag) __wur; 979 #endif 980 981 #ifdef __USE_XOPEN_EXTENDED 982 /* The next four functions all take a master pseudo-tty fd and 983 perform an operation on the associated slave: */ 984 985 /* Chown the slave to the calling user. */ 986 extern int grantpt (int __fd) __THROW; 987 988 /* Release an internal lock so the slave can be opened. 989 Call after grantpt(). */ 990 extern int unlockpt (int __fd) __THROW; 991 992 /* Return the pathname of the pseudo terminal slave associated with 993 the master FD is open on, or NULL on errors. 994 The returned storage is good until the next call to this function. */ 995 extern char *ptsname (int __fd) __THROW __wur; 996 #endif 997 998 #ifdef __USE_GNU 999 /* Store at most BUFLEN characters of the pathname of the slave pseudo 1000 terminal associated with the master FD is open on in BUF. 1001 Return 0 on success, otherwise an error number. */ 1002 extern int ptsname_r (int __fd, char *__buf, size_t __buflen) 1003 __THROW __nonnull ((2)) __fortified_attr_access (__write_only__, 2, 3); 1004 1005 /* Open a master pseudo terminal and return its file descriptor. */ 1006 extern int getpt (void); 1007 #endif 1008 1009 #ifdef __USE_MISC 1010 /* Put the 1 minute, 5 minute and 15 minute load averages into the first 1011 NELEM elements of LOADAVG. Return the number written (never more than 1012 three, but may be less than NELEM), or -1 if an error occurred. */ 1013 extern int getloadavg (double __loadavg[], int __nelem) 1014 __THROW __nonnull ((1)); 1015 #endif 1016 1017 #if defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K 1018 /* Return the index into the active-logins file (utmp) for 1019 the controlling terminal. */ 1020 extern int ttyslot (void) __THROW; 1021 #endif 1022 1023 #include
1024 1025 /* Define some macros helping to catch buffer overflows. */ 1026 #if __USE_FORTIFY_LEVEL > 0 && defined __fortify_function 1027 # include
1028 #endif 1029 1030 #include
1031 #if defined __LDBL_COMPAT || __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI == 1 1032 # include
1033 #endif 1034 1035 __END_DECLS 1036 1037 #endif /* stdlib.h */
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