1 /* Copyright (C) 1991-2007, 2009, 2010, 2011 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, write to the Free 16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 17 02111-1307 USA. */ 18 19 /* 20 * ISO C99 Standard: 7.20 General utilities <stdlib.h> 21 */ 22 23 #ifndef _STDLIB_H 24 25 #include <features.h> 26 27 /* Get size_t, wchar_t and NULL from <stddef.h>. */ 28 #define __need_size_t 29 #ifndef __need_malloc_and_calloc 30 # define __need_wchar_t 31 # define __need_NULL 32 #endif 33 #include <stddef.h> 34 35 __BEGIN_DECLS 36 37 #ifndef __need_malloc_and_calloc 38 #define _STDLIB_H 1 39 40 #if (defined __USE_XOPEN || defined __USE_XOPEN2K8) && !defined _SYS_WAIT_H 41 /* XPG requires a few symbols from <sys/wait.h> being defined. */ 42 # include <bits/waitflags.h> 43 # include <bits/waitstatus.h> 44 45 # ifdef __USE_BSD 46 47 /* Lots of hair to allow traditional BSD use of `union wait' 48 as well as POSIX.1 use of `int' for the status word. */ 49 50 # if defined __GNUC__ && !defined __cplusplus 51 # define __WAIT_INT(status) \ 52 (__extension__ (((union { __typeof(status) __in; int __i; }) \ 53 { .__in = (status) }).__i)) 54 # else 55 # define __WAIT_INT(status) (*(int *) &(status)) 56 # endif 57 58 /* This is the type of the argument to `wait'. The funky union 59 causes redeclarations with either `int *' or `union wait *' to be 60 allowed without complaint. __WAIT_STATUS_DEFN is the type used in 61 the actual function definitions. */ 62 63 # if !defined __GNUC__ || __GNUC__ < 2 || defined __cplusplus 64 # define __WAIT_STATUS void * 65 # define __WAIT_STATUS_DEFN void * 66 # else 67 /* This works in GCC 2.6.1 and later. */ 68 typedef union 69 { 70 union wait *__uptr; 71 int *__iptr; 72 } __WAIT_STATUS __attribute__ ((__transparent_union__)); 73 # define __WAIT_STATUS_DEFN int * 74 # endif 75 76 # else /* Don't use BSD. */ 77 78 # define __WAIT_INT(status) (status) 79 # define __WAIT_STATUS int * 80 # define __WAIT_STATUS_DEFN int * 81 82 # endif /* Use BSD. */ 83 84 /* Define the macros <sys/wait.h> also would define this way. */ 85 # define WEXITSTATUS(status) __WEXITSTATUS (__WAIT_INT (status)) 86 # define WTERMSIG(status) __WTERMSIG (__WAIT_INT (status)) 87 # define WSTOPSIG(status) __WSTOPSIG (__WAIT_INT (status)) 88 # define WIFEXITED(status) __WIFEXITED (__WAIT_INT (status)) 89 # define WIFSIGNALED(status) __WIFSIGNALED (__WAIT_INT (status)) 90 # define WIFSTOPPED(status) __WIFSTOPPED (__WAIT_INT (status)) 91 # ifdef __WIFCONTINUED 92 # define WIFCONTINUED(status) __WIFCONTINUED (__WAIT_INT (status)) 93 # endif 94 #endif /* X/Open or XPG7 and <sys/wait.h> not included. */ 95 96 __BEGIN_NAMESPACE_STD 97 /* Returned by `div'. */ 98 typedef struct 99 { 100 int quot; /* Quotient. */ 101 int rem; /* Remainder. */ 102 } div_t; 103 104 /* Returned by `ldiv'. */ 105 #ifndef __ldiv_t_defined 106 typedef struct 107 { 108 long int quot; /* Quotient. */ 109 long int rem; /* Remainder. */ 110 } ldiv_t; 111 # define __ldiv_t_defined 1 112 #endif 113 __END_NAMESPACE_STD 114 115 #if defined __USE_ISOC99 && !defined __lldiv_t_defined 116 __BEGIN_NAMESPACE_C99 117 /* Returned by `lldiv'. */ 118 __extension__ typedef struct 119 { 120 long long int quot; /* Quotient. */ 121 long long int rem; /* Remainder. */ 122 } lldiv_t; 123 # define __lldiv_t_defined 1 124 __END_NAMESPACE_C99 125 #endif 126 127 128 /* The largest number rand will return (same as INT_MAX). */ 129 #define RAND_MAX 2147483647 130 131 132 /* We define these the same for all machines. 133 Changes from this to the outside world should be done in `_exit'. */ 134 #define EXIT_FAILURE 1 /* Failing exit status. */ 135 #define EXIT_SUCCESS 0 /* Successful exit status. */ 136 137 138 /* Maximum length of a multibyte character in the current locale. */ 139 #define MB_CUR_MAX (__ctype_get_mb_cur_max ()) 140 extern size_t __ctype_get_mb_cur_max (void) __THROW __wur; 141 142 143 __BEGIN_NAMESPACE_STD 144 /* Convert a string to a floating-point number. */ 145 extern double atof (__const char *__nptr) 146 __THROW __attribute_pure__ __nonnull ((1)) __wur; 147 /* Convert a string to an integer. */ 148 extern int atoi (__const char *__nptr) 149 __THROW __attribute_pure__ __nonnull ((1)) __wur; 150 /* Convert a string to a long integer. */ 151 extern long int atol (__const char *__nptr) 152 __THROW __attribute_pure__ __nonnull ((1)) __wur; 153 __END_NAMESPACE_STD 154 155 #if defined __USE_ISOC99 || (defined __GLIBC_HAVE_LONG_LONG && defined __USE_MISC) 156 __BEGIN_NAMESPACE_C99 157 /* Convert a string to a long long integer. */ 158 __extension__ extern long long int atoll (__const char *__nptr) 159 __THROW __attribute_pure__ __nonnull ((1)) __wur; 160 __END_NAMESPACE_C99 161 #endif 162 163 __BEGIN_NAMESPACE_STD 164 /* Convert a string to a floating-point number. */ 165 extern double strtod (__const char *__restrict __nptr, 166 char **__restrict __endptr) 167 __THROW __nonnull ((1)) __wur; 168 __END_NAMESPACE_STD 169 170 #ifdef __USE_ISOC99 171 __BEGIN_NAMESPACE_C99 172 /* Likewise for `float' and `long double' sizes of floating-point numbers. */ 173 extern float strtof (__const char *__restrict __nptr, 174 char **__restrict __endptr) __THROW __nonnull ((1)) __wur; 175 176 extern long double strtold (__const char *__restrict __nptr, 177 char **__restrict __endptr) 178 __THROW __nonnull ((1)) __wur; 179 __END_NAMESPACE_C99 180 #endif 181 182 __BEGIN_NAMESPACE_STD 183 /* Convert a string to a long integer. */ 184 extern long int strtol (__const char *__restrict __nptr, 185 char **__restrict __endptr, int __base) 186 __THROW __nonnull ((1)) __wur; 187 /* Convert a string to an unsigned long integer. */ 188 extern unsigned long int strtoul (__const char *__restrict __nptr, 189 char **__restrict __endptr, int __base) 190 __THROW __nonnull ((1)) __wur; 191 __END_NAMESPACE_STD 192 193 #if defined __GLIBC_HAVE_LONG_LONG && defined __USE_BSD 194 /* Convert a string to a quadword integer. */ 195 __extension__ 196 extern long long int strtoq (__const char *__restrict __nptr, 197 char **__restrict __endptr, int __base) 198 __THROW __nonnull ((1)) __wur; 199 /* Convert a string to an unsigned quadword integer. */ 200 __extension__ 201 extern unsigned long long int strtouq (__const char *__restrict __nptr, 202 char **__restrict __endptr, int __base) 203 __THROW __nonnull ((1)) __wur; 204 #endif /* GCC and use BSD. */ 205 206 #if defined __USE_ISOC99 || (defined __GLIBC_HAVE_LONG_LONG && defined __USE_MISC) 207 __BEGIN_NAMESPACE_C99 208 /* Convert a string to a quadword integer. */ 209 __extension__ 210 extern long long int strtoll (__const char *__restrict __nptr, 211 char **__restrict __endptr, int __base) 212 __THROW __nonnull ((1)) __wur; 213 /* Convert a string to an unsigned quadword integer. */ 214 __extension__ 215 extern unsigned long long int strtoull (__const char *__restrict __nptr, 216 char **__restrict __endptr, int __base) 217 __THROW __nonnull ((1)) __wur; 218 __END_NAMESPACE_C99 219 #endif /* ISO C99 or GCC and use MISC. */ 220 221 222 #ifdef __USE_GNU 223 /* The concept of one static locale per category is not very well 224 thought out. Many applications will need to process its data using 225 information from several different locales. Another problem is 226 the implementation of the internationalization handling in the 227 ISO C++ standard library. To support this another set of 228 the functions using locale data exist which take an additional 229 argument. 230 231 Attention: even though several *_l interfaces are part of POSIX:2008, 232 these are not. */ 233 234 /* Structure for reentrant locale using functions. This is an 235 (almost) opaque type for the user level programs. */ 236 # include <xlocale.h> 237 238 /* Special versions of the functions above which take the locale to 239 use as an additional parameter. */ 240 extern long int strtol_l (__const char *__restrict __nptr, 241 char **__restrict __endptr, int __base, 242 __locale_t __loc) __THROW __nonnull ((1, 4)) __wur; 243 244 extern unsigned long int strtoul_l (__const char *__restrict __nptr, 245 char **__restrict __endptr, 246 int __base, __locale_t __loc) 247 __THROW __nonnull ((1, 4)) __wur; 248 249 __extension__ 250 extern long long int strtoll_l (__const char *__restrict __nptr, 251 char **__restrict __endptr, int __base, 252 __locale_t __loc) 253 __THROW __nonnull ((1, 4)) __wur; 254 255 __extension__ 256 extern unsigned long long int strtoull_l (__const char *__restrict __nptr, 257 char **__restrict __endptr, 258 int __base, __locale_t __loc) 259 __THROW __nonnull ((1, 4)) __wur; 260 261 extern double strtod_l (__const char *__restrict __nptr, 262 char **__restrict __endptr, __locale_t __loc) 263 __THROW __nonnull ((1, 3)) __wur; 264 265 extern float strtof_l (__const char *__restrict __nptr, 266 char **__restrict __endptr, __locale_t __loc) 267 __THROW __nonnull ((1, 3)) __wur; 268 269 extern long double strtold_l (__const char *__restrict __nptr, 270 char **__restrict __endptr, 271 __locale_t __loc) 272 __THROW __nonnull ((1, 3)) __wur; 273 #endif /* GNU */ 274 275 276 #ifdef __USE_EXTERN_INLINES 277 __BEGIN_NAMESPACE_STD 278 __extern_inline double 279 __NTH (atof (__const char *__nptr)) 280 { 281 return strtod (__nptr, (char **) NULL); 282 } 283 __extern_inline int 284 __NTH (atoi (__const char *__nptr)) 285 { 286 return (int) strtol (__nptr, (char **) NULL, 10); 287 } 288 __extern_inline long int 289 __NTH (atol (__const char *__nptr)) 290 { 291 return strtol (__nptr, (char **) NULL, 10); 292 } 293 __END_NAMESPACE_STD 294 295 # if defined __USE_MISC || defined __USE_ISOC99 296 __BEGIN_NAMESPACE_C99 297 __extension__ __extern_inline long long int 298 __NTH (atoll (__const char *__nptr)) 299 { 300 return strtoll (__nptr, (char **) NULL, 10); 301 } 302 __END_NAMESPACE_C99 303 # endif 304 #endif /* Optimizing and Inlining. */ 305 306 307 #if defined __USE_SVID || defined __USE_XOPEN_EXTENDED 308 /* Convert N to base 64 using the digits "./0-9A-Za-z", least-significant 309 digit first. Returns a pointer to static storage overwritten by the 310 next call. */ 311 extern char *l64a (long int __n) __THROW __wur; 312 313 /* Read a number from a string S in base 64 as above. */ 314 extern long int a64l (__const char *__s) 315 __THROW __attribute_pure__ __nonnull ((1)) __wur; 316 317 #endif /* Use SVID || extended X/Open. */ 318 319 #if defined __USE_SVID || defined __USE_XOPEN_EXTENDED || defined __USE_BSD 320 # include <sys/types.h> /* we need int32_t... */ 321 322 /* These are the functions that actually do things. The `random', `srandom', 323 `initstate' and `setstate' functions are those from BSD Unices. 324 The `rand' and `srand' functions are required by the ANSI standard. 325 We provide both interfaces to the same random number generator. */ 326 /* Return a random long integer between 0 and RAND_MAX inclusive. */ 327 extern long int random (void) __THROW; 328 329 /* Seed the random number generator with the given number. */ 330 extern void srandom (unsigned int __seed) __THROW; 331 332 /* Initialize the random number generator to use state buffer STATEBUF, 333 of length STATELEN, and seed it with SEED. Optimal lengths are 8, 16, 334 32, 64, 128 and 256, the bigger the better; values less than 8 will 335 cause an error and values greater than 256 will be rounded down. */ 336 extern char *initstate (unsigned int __seed, char *__statebuf, 337 size_t __statelen) __THROW __nonnull ((2)); 338 339 /* Switch the random number generator to state buffer STATEBUF, 340 which should have been previously initialized by `initstate'. */ 341 extern char *setstate (char *__statebuf) __THROW __nonnull ((1)); 342 343 344 # ifdef __USE_MISC 345 /* Reentrant versions of the `random' family of functions. 346 These functions all use the following data structure to contain 347 state, rather than global state variables. */ 348 349 struct random_data 350 { 351 int32_t *fptr; /* Front pointer. */ 352 int32_t *rptr; /* Rear pointer. */ 353 int32_t *state; /* Array of state values. */ 354 int rand_type; /* Type of random number generator. */ 355 int rand_deg; /* Degree of random number generator. */ 356 int rand_sep; /* Distance between front and rear. */ 357 int32_t *end_ptr; /* Pointer behind state table. */ 358 }; 359 360 extern int random_r (struct random_data *__restrict __buf, 361 int32_t *__restrict __result) __THROW __nonnull ((1, 2)); 362 363 extern int srandom_r (unsigned int __seed, struct random_data *__buf) 364 __THROW __nonnull ((2)); 365 366 extern int initstate_r (unsigned int __seed, char *__restrict __statebuf, 367 size_t __statelen, 368 struct random_data *__restrict __buf) 369 __THROW __nonnull ((2, 4)); 370 371 extern int setstate_r (char *__restrict __statebuf, 372 struct random_data *__restrict __buf) 373 __THROW __nonnull ((1, 2)); 374 # endif /* Use misc. */ 375 #endif /* Use SVID || extended X/Open || BSD. */ 376 377 378 __BEGIN_NAMESPACE_STD 379 /* Return a random integer between 0 and RAND_MAX inclusive. */ 380 extern int rand (void) __THROW; 381 /* Seed the random number generator with the given number. */ 382 extern void srand (unsigned int __seed) __THROW; 383 __END_NAMESPACE_STD 384 385 #ifdef __USE_POSIX 386 /* Reentrant interface according to POSIX.1. */ 387 extern int rand_r (unsigned int *__seed) __THROW; 388 #endif 389 390 391 #if defined __USE_SVID || defined __USE_XOPEN 392 /* System V style 48-bit random number generator functions. */ 393 394 /* Return non-negative, double-precision floating-point value in [0.0,1.0). */ 395 extern double drand48 (void) __THROW; 396 extern double erand48 (unsigned short int __xsubi[3]) __THROW __nonnull ((1)); 397 398 /* Return non-negative, long integer in [0,2^31). */ 399 extern long int lrand48 (void) __THROW; 400 extern long int nrand48 (unsigned short int __xsubi[3]) 401 __THROW __nonnull ((1)); 402 403 /* Return signed, long integers in [-2^31,2^31). */ 404 extern long int mrand48 (void) __THROW; 405 extern long int jrand48 (unsigned short int __xsubi[3]) 406 __THROW __nonnull ((1)); 407 408 /* Seed random number generator. */ 409 extern void srand48 (long int __seedval) __THROW; 410 extern unsigned short int *seed48 (unsigned short int __seed16v[3]) 411 __THROW __nonnull ((1)); 412 extern void lcong48 (unsigned short int __param[7]) __THROW __nonnull ((1)); 413 414 # ifdef __USE_MISC 415 /* Data structure for communication with thread safe versions. This 416 type is to be regarded as opaque. It's only exported because users 417 have to allocate objects of this type. */ 418 struct drand48_data 419 { 420 unsigned short int __x[3]; /* Current state. */ 421 unsigned short int __old_x[3]; /* Old state. */ 422 unsigned short int __c; /* Additive const. in congruential formula. */ 423 unsigned short int __init; /* Flag for initializing. */ 424 unsigned long long int __a; /* Factor in congruential formula. */ 425 }; 426 427 /* Return non-negative, double-precision floating-point value in [0.0,1.0). */ 428 extern int drand48_r (struct drand48_data *__restrict __buffer, 429 double *__restrict __result) __THROW __nonnull ((1, 2)); 430 extern int erand48_r (unsigned short int __xsubi[3], 431 struct drand48_data *__restrict __buffer, 432 double *__restrict __result) __THROW __nonnull ((1, 2)); 433 434 /* Return non-negative, long integer in [0,2^31). */ 435 extern int lrand48_r (struct drand48_data *__restrict __buffer, 436 long int *__restrict __result) 437 __THROW __nonnull ((1, 2)); 438 extern int nrand48_r (unsigned short int __xsubi[3], 439 struct drand48_data *__restrict __buffer, 440 long int *__restrict __result) 441 __THROW __nonnull ((1, 2)); 442 443 /* Return signed, long integers in [-2^31,2^31). */ 444 extern int mrand48_r (struct drand48_data *__restrict __buffer, 445 long int *__restrict __result) 446 __THROW __nonnull ((1, 2)); 447 extern int jrand48_r (unsigned short int __xsubi[3], 448 struct drand48_data *__restrict __buffer, 449 long int *__restrict __result) 450 __THROW __nonnull ((1, 2)); 451 452 /* Seed random number generator. */ 453 extern int srand48_r (long int __seedval, struct drand48_data *__buffer) 454 __THROW __nonnull ((2)); 455 456 extern int seed48_r (unsigned short int __seed16v[3], 457 struct drand48_data *__buffer) __THROW __nonnull ((1, 2)); 458 459 extern int lcong48_r (unsigned short int __param[7], 460 struct drand48_data *__buffer) 461 __THROW __nonnull ((1, 2)); 462 # endif /* Use misc. */ 463 #endif /* Use SVID or X/Open. */ 464 465 #endif /* don't just need malloc and calloc */ 466 467 #ifndef __malloc_and_calloc_defined 468 # define __malloc_and_calloc_defined 469 __BEGIN_NAMESPACE_STD 470 /* Allocate SIZE bytes of memory. */ 471 extern void *malloc (size_t __size) __THROW __attribute_malloc__ __wur; 472 /* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */ 473 extern void *calloc (size_t __nmemb, size_t __size) 474 __THROW __attribute_malloc__ __wur; 475 __END_NAMESPACE_STD 476 #endif 477 478 #ifndef __need_malloc_and_calloc 479 __BEGIN_NAMESPACE_STD 480 /* Re-allocate the previously allocated block 481 in PTR, making the new block SIZE bytes long. */ 482 /* __attribute_malloc__ is not used, because if realloc returns 483 the same pointer that was passed to it, aliasing needs to be allowed 484 between objects pointed by the old and new pointers. */ 485 extern void *realloc (void *__ptr, size_t __size) 486 __THROW __attribute_warn_unused_result__; 487 /* Free a block allocated by `malloc', `realloc' or `calloc'. */ 488 extern void free (void *__ptr) __THROW; 489 __END_NAMESPACE_STD 490 491 #ifdef __USE_MISC 492 /* Free a block. An alias for `free'. (Sun Unices). */ 493 extern void cfree (void *__ptr) __THROW; 494 #endif /* Use misc. */ 495 496 #if defined __USE_GNU || defined __USE_BSD || defined __USE_MISC 497 # include <alloca.h> 498 #endif /* Use GNU, BSD, or misc. */ 499 500 #if (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K) \ 501 || defined __USE_BSD 502 /* Allocate SIZE bytes on a page boundary. The storage cannot be freed. */ 503 extern void *valloc (size_t __size) __THROW __attribute_malloc__ __wur; 504 #endif 505 506 #ifdef __USE_XOPEN2K 507 /* Allocate memory of SIZE bytes with an alignment of ALIGNMENT. */ 508 extern int posix_memalign (void **__memptr, size_t __alignment, size_t __size) 509 __THROW __nonnull ((1)) __wur; 510 #endif 511 512 __BEGIN_NAMESPACE_STD 513 /* Abort execution and generate a core-dump. */ 514 extern void abort (void) __THROW __attribute__ ((__noreturn__)); 515 516 517 /* Register a function to be called when `exit' is called. */ 518 extern int atexit (void (*__func) (void)) __THROW __nonnull ((1)); 519 520 #ifdef __USE_GNU 521 // XXX There should be a macro to signal with C++ revision is used. 522 // XXX This function is in the C++1x revision. 523 /* Register a function to be called when `quick_exit' is called. */ 524 # ifdef __cplusplus 525 extern "C++" int at_quick_exit (void (*__func) (void)) 526 __THROW __asm ("at_quick_exit") __nonnull ((1)); 527 # else 528 extern int at_quick_exit (void (*__func) (void)) __THROW __nonnull ((1)); 529 # endif 530 #endif 531 __END_NAMESPACE_STD 532 533 #ifdef __USE_MISC 534 /* Register a function to be called with the status 535 given to `exit' and the given argument. */ 536 extern int on_exit (void (*__func) (int __status, void *__arg), void *__arg) 537 __THROW __nonnull ((1)); 538 #endif 539 540 __BEGIN_NAMESPACE_STD 541 /* Call all functions registered with `atexit' and `on_exit', 542 in the reverse of the order in which they were registered, 543 perform stdio cleanup, and terminate program execution with STATUS. */ 544 extern void exit (int __status) __THROW __attribute__ ((__noreturn__)); 545 546 #ifdef __USE_GNU 547 // XXX There should be a macro to signal with C++ revision is used. 548 // XXX This function is in the C++1x revision. 549 /* Call all functions registered with `at_quick_exit' in the reverse 550 of the order in which they were registered and terminate program 551 execution with STATUS. */ 552 extern void quick_exit (int __status) __THROW __attribute__ ((__noreturn__)); 553 #endif 554 __END_NAMESPACE_STD 555 556 #ifdef __USE_ISOC99 557 __BEGIN_NAMESPACE_C99 558 /* Terminate the program with STATUS without calling any of the 559 functions registered with `atexit' or `on_exit'. */ 560 extern void _Exit (int __status) __THROW __attribute__ ((__noreturn__)); 561 __END_NAMESPACE_C99 562 #endif 563 564 565 __BEGIN_NAMESPACE_STD 566 /* Return the value of envariable NAME, or NULL if it doesn't exist. */ 567 extern char *getenv (__const char *__name) __THROW __nonnull ((1)) __wur; 568 __END_NAMESPACE_STD 569 570 /* This function is similar to the above but returns NULL if the 571 programs is running with SUID or SGID enabled. */ 572 extern char *__secure_getenv (__const char *__name) 573 __THROW __nonnull ((1)) __wur; 574 575 #if defined __USE_SVID || defined __USE_XOPEN 576 /* The SVID says this is in <stdio.h>, but this seems a better place. */ 577 /* Put STRING, which is of the form "NAME=VALUE", in the environment. 578 If there is no `=', remove NAME from the environment. */ 579 extern int putenv (char *__string) __THROW __nonnull ((1)); 580 #endif 581 582 #if defined __USE_BSD || defined __USE_XOPEN2K 583 /* Set NAME to VALUE in the environment. 584 If REPLACE is nonzero, overwrite an existing value. */ 585 extern int setenv (__const char *__name, __const char *__value, int __replace) 586 __THROW __nonnull ((2)); 587 588 /* Remove the variable NAME from the environment. */ 589 extern int unsetenv (__const char *__name) __THROW __nonnull ((1)); 590 #endif 591 592 #ifdef __USE_MISC 593 /* The `clearenv' was planned to be added to POSIX.1 but probably 594 never made it. Nevertheless the POSIX.9 standard (POSIX bindings 595 for Fortran 77) requires this function. */ 596 extern int clearenv (void) __THROW; 597 #endif 598 599 600 #if defined __USE_MISC \ 601 || (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K) 602 /* Generate a unique temporary file name from TEMPLATE. 603 The last six characters of TEMPLATE must be "XXXXXX"; 604 they are replaced with a string that makes the file name unique. 605 Returns TEMPLATE, or a null pointer if it cannot get a unique file name. */ 606 extern char *mktemp (char *__template) __THROW __nonnull ((1)) __wur; 607 #endif 608 609 #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED \ 610 || defined __USE_XOPEN2K8 611 /* Generate a unique temporary file name from TEMPLATE. 612 The last six characters of TEMPLATE must be "XXXXXX"; 613 they are replaced with a string that makes the filename unique. 614 Returns a file descriptor open on the file for reading and writing, 615 or -1 if it cannot create a uniquely-named file. 616 617 This function is a possible cancellation point and therefore not 618 marked with __THROW. */ 619 # ifndef __USE_FILE_OFFSET64 620 extern int mkstemp (char *__template) __nonnull ((1)) __wur; 621 # else 622 # ifdef __REDIRECT 623 extern int __REDIRECT (mkstemp, (char *__template), mkstemp64) 624 __nonnull ((1)) __wur; 625 # else 626 # define mkstemp mkstemp64 627 # endif 628 # endif 629 # ifdef __USE_LARGEFILE64 630 extern int mkstemp64 (char *__template) __nonnull ((1)) __wur; 631 # endif 632 #endif 633 634 #ifdef __USE_MISC 635 /* Similar to mkstemp, but the template can have a suffix after the 636 XXXXXX. The length of the suffix is specified in the second 637 parameter. 638 639 This function is a possible cancellation point and therefore not 640 marked with __THROW. */ 641 # ifndef __USE_FILE_OFFSET64 642 extern int mkstemps (char *__template, int __suffixlen) __nonnull ((1)) __wur; 643 # else 644 # ifdef __REDIRECT 645 extern int __REDIRECT (mkstemps, (char *__template, int __suffixlen), 646 mkstemps64) __nonnull ((1)) __wur; 647 # else 648 # define mkstemps mkstemps64 649 # endif 650 # endif 651 # ifdef __USE_LARGEFILE64 652 extern int mkstemps64 (char *__template, int __suffixlen) 653 __nonnull ((1)) __wur; 654 # endif 655 #endif 656 657 #if defined __USE_BSD || defined __USE_XOPEN2K8 658 /* Create a unique temporary directory from TEMPLATE. 659 The last six characters of TEMPLATE must be "XXXXXX"; 660 they are replaced with a string that makes the directory name unique. 661 Returns TEMPLATE, or a null pointer if it cannot get a unique name. 662 The directory is created mode 700. */ 663 extern char *mkdtemp (char *__template) __THROW __nonnull ((1)) __wur; 664 #endif 665 666 #ifdef __USE_GNU 667 /* Generate a unique temporary file name from TEMPLATE similar to 668 mkstemp. But allow the caller to pass additional flags which are 669 used in the open call to create the file.. 670 671 This function is a possible cancellation point and therefore not 672 marked with __THROW. */ 673 # ifndef __USE_FILE_OFFSET64 674 extern int mkostemp (char *__template, int __flags) __nonnull ((1)) __wur; 675 # else 676 # ifdef __REDIRECT 677 extern int __REDIRECT (mkostemp, (char *__template, int __flags), mkostemp64) 678 __nonnull ((1)) __wur; 679 # else 680 # define mkostemp mkostemp64 681 # endif 682 # endif 683 # ifdef __USE_LARGEFILE64 684 extern int mkostemp64 (char *__template, int __flags) __nonnull ((1)) __wur; 685 # endif 686 687 /* Similar to mkostemp, but the template can have a suffix after the 688 XXXXXX. The length of the suffix is specified in the second 689 parameter. 690 691 This function is a possible cancellation point and therefore not 692 marked with __THROW. */ 693 # ifndef __USE_FILE_OFFSET64 694 extern int mkostemps (char *__template, int __suffixlen, int __flags) 695 __nonnull ((1)) __wur; 696 # else 697 # ifdef __REDIRECT 698 extern int __REDIRECT (mkostemps, (char *__template, int __suffixlen, 699 int __flags), mkostemps64) 700 __nonnull ((1)) __wur; 701 # else 702 # define mkostemps mkostemps64 703 # endif 704 # endif 705 # ifdef __USE_LARGEFILE64 706 extern int mkostemps64 (char *__template, int __suffixlen, int __flags) 707 __nonnull ((1)) __wur; 708 # endif 709 #endif 710 711 712 __BEGIN_NAMESPACE_STD 713 /* Execute the given line as a shell command. 714 715 This function is a cancellation point and therefore not marked with 716 __THROW. */ 717 extern int system (__const char *__command) __wur; 718 __END_NAMESPACE_STD 719 720 721 #ifdef __USE_GNU 722 /* Return a malloc'd string containing the canonical absolute name of the 723 existing named file. */ 724 extern char *canonicalize_file_name (__const char *__name) 725 __THROW __nonnull ((1)) __wur; 726 #endif 727 728 #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED 729 /* Return the canonical absolute name of file NAME. If RESOLVED is 730 null, the result is malloc'd; otherwise, if the canonical name is 731 PATH_MAX chars or more, returns null with `errno' set to 732 ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars, 733 returns the name in RESOLVED. */ 734 extern char *realpath (__const char *__restrict __name, 735 char *__restrict __resolved) __THROW __wur; 736 #endif 737 738 739 /* Shorthand for type of comparison functions. */ 740 #ifndef __COMPAR_FN_T 741 # define __COMPAR_FN_T 742 typedef int (*__compar_fn_t) (__const void *, __const void *); 743 744 # ifdef __USE_GNU 745 typedef __compar_fn_t comparison_fn_t; 746 # endif 747 #endif 748 #ifdef __USE_GNU 749 typedef int (*__compar_d_fn_t) (__const void *, __const void *, void *); 750 #endif 751 752 __BEGIN_NAMESPACE_STD 753 /* Do a binary search for KEY in BASE, which consists of NMEMB elements 754 of SIZE bytes each, using COMPAR to perform the comparisons. */ 755 extern void *bsearch (__const void *__key, __const void *__base, 756 size_t __nmemb, size_t __size, __compar_fn_t __compar) 757 __nonnull ((1, 2, 5)) __wur; 758 759 /* Sort NMEMB elements of BASE, of SIZE bytes each, 760 using COMPAR to perform the comparisons. */ 761 extern void qsort (void *__base, size_t __nmemb, size_t __size, 762 __compar_fn_t __compar) __nonnull ((1, 4)); 763 #ifdef __USE_GNU 764 extern void qsort_r (void *__base, size_t __nmemb, size_t __size, 765 __compar_d_fn_t __compar, void *__arg) 766 __nonnull ((1, 4)); 767 #endif 768 769 770 /* Return the absolute value of X. */ 771 extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur; 772 extern long int labs (long int __x) __THROW __attribute__ ((__const__)) __wur; 773 __END_NAMESPACE_STD 774 775 #ifdef __USE_ISOC99 776 __extension__ extern long long int llabs (long long int __x) 777 __THROW __attribute__ ((__const__)) __wur; 778 #endif 779 780 781 __BEGIN_NAMESPACE_STD 782 /* Return the `div_t', `ldiv_t' or `lldiv_t' representation 783 of the value of NUMER over DENOM. */ 784 /* GCC may have built-ins for these someday. */ 785 extern div_t div (int __numer, int __denom) 786 __THROW __attribute__ ((__const__)) __wur; 787 extern ldiv_t ldiv (long int __numer, long int __denom) 788 __THROW __attribute__ ((__const__)) __wur; 789 __END_NAMESPACE_STD 790 791 #ifdef __USE_ISOC99 792 __BEGIN_NAMESPACE_C99 793 __extension__ extern lldiv_t lldiv (long long int __numer, 794 long long int __denom) 795 __THROW __attribute__ ((__const__)) __wur; 796 __END_NAMESPACE_C99 797 #endif 798 799 800 #if (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K) \ 801 || defined __USE_SVID 802 /* Convert floating point numbers to strings. The returned values are 803 valid only until another call to the same function. */ 804 805 /* Convert VALUE to a string with NDIGIT digits and return a pointer to 806 this. Set *DECPT with the position of the decimal character and *SIGN 807 with the sign of the number. */ 808 extern char *ecvt (double __value, int __ndigit, int *__restrict __decpt, 809 int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur; 810 811 /* Convert VALUE to a string rounded to NDIGIT decimal digits. Set *DECPT 812 with the position of the decimal character and *SIGN with the sign of 813 the number. */ 814 extern char *fcvt (double __value, int __ndigit, int *__restrict __decpt, 815 int *__restrict __sign) __THROW __nonnull ((3, 4)) __wur; 816 817 /* If possible convert VALUE to a string with NDIGIT significant digits. 818 Otherwise use exponential representation. The resulting string will 819 be written to BUF. */ 820 extern char *gcvt (double __value, int __ndigit, char *__buf) 821 __THROW __nonnull ((3)) __wur; 822 823 824 # ifdef __USE_MISC 825 /* Long double versions of above functions. */ 826 extern char *qecvt (long double __value, int __ndigit, 827 int *__restrict __decpt, int *__restrict __sign) 828 __THROW __nonnull ((3, 4)) __wur; 829 extern char *qfcvt (long double __value, int __ndigit, 830 int *__restrict __decpt, int *__restrict __sign) 831 __THROW __nonnull ((3, 4)) __wur; 832 extern char *qgcvt (long double __value, int __ndigit, char *__buf) 833 __THROW __nonnull ((3)) __wur; 834 835 836 /* Reentrant version of the functions above which provide their own 837 buffers. */ 838 extern int ecvt_r (double __value, int __ndigit, int *__restrict __decpt, 839 int *__restrict __sign, char *__restrict __buf, 840 size_t __len) __THROW __nonnull ((3, 4, 5)); 841 extern int fcvt_r (double __value, int __ndigit, int *__restrict __decpt, 842 int *__restrict __sign, char *__restrict __buf, 843 size_t __len) __THROW __nonnull ((3, 4, 5)); 844 845 extern int qecvt_r (long double __value, int __ndigit, 846 int *__restrict __decpt, int *__restrict __sign, 847 char *__restrict __buf, size_t __len) 848 __THROW __nonnull ((3, 4, 5)); 849 extern int qfcvt_r (long double __value, int __ndigit, 850 int *__restrict __decpt, int *__restrict __sign, 851 char *__restrict __buf, size_t __len) 852 __THROW __nonnull ((3, 4, 5)); 853 # endif /* misc */ 854 #endif /* use MISC || use X/Open Unix */ 855 856 857 __BEGIN_NAMESPACE_STD 858 /* Return the length of the multibyte character 859 in S, which is no longer than N. */ 860 extern int mblen (__const char *__s, size_t __n) __THROW __wur; 861 /* Return the length of the given multibyte character, 862 putting its `wchar_t' representation in *PWC. */ 863 extern int mbtowc (wchar_t *__restrict __pwc, 864 __const char *__restrict __s, size_t __n) __THROW __wur; 865 /* Put the multibyte character represented 866 by WCHAR in S, returning its length. */ 867 extern int wctomb (char *__s, wchar_t __wchar) __THROW __wur; 868 869 870 /* Convert a multibyte string to a wide char string. */ 871 extern size_t mbstowcs (wchar_t *__restrict __pwcs, 872 __const char *__restrict __s, size_t __n) __THROW; 873 /* Convert a wide char string to multibyte string. */ 874 extern size_t wcstombs (char *__restrict __s, 875 __const wchar_t *__restrict __pwcs, size_t __n) 876 __THROW; 877 __END_NAMESPACE_STD 878 879 880 #ifdef __USE_SVID 881 /* Determine whether the string value of RESPONSE matches the affirmation 882 or negative response expression as specified by the LC_MESSAGES category 883 in the program's current locale. Returns 1 if affirmative, 0 if 884 negative, and -1 if not matching. */ 885 extern int rpmatch (__const char *__response) __THROW __nonnull ((1)) __wur; 886 #endif 887 888 889 #if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8 890 /* Parse comma separated suboption from *OPTIONP and match against 891 strings in TOKENS. If found return index and set *VALUEP to 892 optional value introduced by an equal sign. If the suboption is 893 not part of TOKENS return in *VALUEP beginning of unknown 894 suboption. On exit *OPTIONP is set to the beginning of the next 895 token or at the terminating NUL character. */ 896 extern int getsubopt (char **__restrict __optionp, 897 char *__const *__restrict __tokens, 898 char **__restrict __valuep) 899 __THROW __nonnull ((1, 2, 3)) __wur; 900 #endif 901 902 903 #ifdef __USE_XOPEN 904 /* Setup DES tables according KEY. */ 905 extern void setkey (__const char *__key) __THROW __nonnull ((1)); 906 #endif 907 908 909 /* X/Open pseudo terminal handling. */ 910 911 #ifdef __USE_XOPEN2KXSI 912 /* Return a master pseudo-terminal handle. */ 913 extern int posix_openpt (int __oflag) __wur; 914 #endif 915 916 #ifdef __USE_XOPEN 917 /* The next four functions all take a master pseudo-tty fd and 918 perform an operation on the associated slave: */ 919 920 /* Chown the slave to the calling user. */ 921 extern int grantpt (int __fd) __THROW; 922 923 /* Release an internal lock so the slave can be opened. 924 Call after grantpt(). */ 925 extern int unlockpt (int __fd) __THROW; 926 927 /* Return the pathname of the pseudo terminal slave assoicated with 928 the master FD is open on, or NULL on errors. 929 The returned storage is good until the next call to this function. */ 930 extern char *ptsname (int __fd) __THROW __wur; 931 #endif 932 933 #ifdef __USE_GNU 934 /* Store at most BUFLEN characters of the pathname of the slave pseudo 935 terminal associated with the master FD is open on in BUF. 936 Return 0 on success, otherwise an error number. */ 937 extern int ptsname_r (int __fd, char *__buf, size_t __buflen) 938 __THROW __nonnull ((2)); 939 940 /* Open a master pseudo terminal and return its file descriptor. */ 941 extern int getpt (void); 942 #endif 943 944 #ifdef __USE_BSD 945 /* Put the 1 minute, 5 minute and 15 minute load averages into the first 946 NELEM elements of LOADAVG. Return the number written (never more than 947 three, but may be less than NELEM), or -1 if an error occurred. */ 948 extern int getloadavg (double __loadavg[], int __nelem) 949 __THROW __nonnull ((1)); 950 #endif 951 952 953 /* Define some macros helping to catch buffer overflows. */ 954 #if __USE_FORTIFY_LEVEL > 0 && defined __extern_always_inline 955 # include <bits/stdlib.h> 956 #endif 957 #ifdef __LDBL_COMPAT 958 # include <bits/stdlib-ldbl.h> 959 #endif 960 961 #endif /* don't just need malloc and calloc */ 962 #undef __need_malloc_and_calloc 963 964 __END_DECLS 965 966 #endif /* stdlib.h */ 967
