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Diffstat (limited to 'stdlib/stdlib.h')
| -rw-r--r-- | stdlib/stdlib.h | 289 |
1 files changed, 289 insertions, 0 deletions
diff --git a/stdlib/stdlib.h b/stdlib/stdlib.h new file mode 100644 index 0000000..d64a2ff --- /dev/null +++ b/stdlib/stdlib.h @@ -0,0 +1,289 @@ +/* Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the, 1992 Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +/* + * ANSI Standard: 4.10 GENERAL UTILITIES <stdlib.h> + */ + +#ifndef _STDLIB_H + +#define _STDLIB_H 1 +#include <features.h> + +/* Get size_t, wchar_t and NULL from <stddef.h>. */ +#define __need_size_t +#define __need_wchar_t +#define __need_NULL +#include <stddef.h> + +#define __need_Emath +#include <errno.h> + +__BEGIN_DECLS + +/* Returned by `div'. */ +typedef struct + { + int quot; /* Quotient. */ + int rem; /* Remainder. */ + } div_t; + +/* Returned by `ldiv'. */ +typedef struct + { + long int quot; /* Quotient. */ + long int rem; /* Remainder. */ + } ldiv_t; + + +/* The largest number rand will return (same as INT_MAX). */ +#define RAND_MAX 2147483647 + + +/* We define these the same for all machines. + Changes from this to the outside world should be done in `_exit'. */ +#define EXIT_FAILURE 1 /* Failing exit status. */ +#define EXIT_SUCCESS 0 /* Successful exit status. */ + + +/* Maximum length of a multibyte character in the current locale. + This is just one until the fancy locale support is finished. */ +#define MB_CUR_MAX 1 + + +/* Convert a string to a floating-point number. */ +extern double atof __P ((__const char *__nptr)); +/* Convert a string to an integer. */ +extern int atoi __P ((__const char *__nptr)); +/* Convert a string to a long integer. */ +extern long int atol __P ((__const char *__nptr)); + +/* Convert a string to a floating-point number. */ +extern double strtod __P ((__const char *__nptr, char **__endptr)); + +#ifdef __USE_GNU +/* Likewise for `float' and `long double' sizes of floating-point numbers. */ +extern float __strtof __P ((__const char *__nptr, char **__endptr)); +extern float strtof __P ((__const char *__nptr, char **__endptr)); +extern __long_double_t __strtold __P ((__const char *__nptr, char **__endptr)); +extern __long_double_t strtold __P ((__const char *__nptr, char **__endptr)); +#endif + +/* Convert a string to a long integer. */ +extern long int strtol __P ((__const char *__nptr, char **__endptr, + int __base)); +/* Convert a string to an unsigned long integer. */ +extern unsigned long int strtoul __P ((__const char *__nptr, + char **__endptr, int __base)); + +#if defined (__GNUC__) && defined (__USE_BSD) +/* Convert a string to a quadword integer. */ +extern long long int strtoq __P ((__const char *__nptr, char **__endptr, + int __base)); +/* Convert a string to an unsigned quadword integer. */ +extern unsigned long long int strtouq __P ((__const char *__nptr, + char **__endptr, int __base)); +#endif /* GCC and use BSD. */ + +#if defined (__OPTIMIZE__) && __GNUC__ >= 2 +extern __inline double atof (__const char *__nptr) +{ return strtod(__nptr, (char **) NULL); } +extern __inline int atoi (__const char *__nptr) +{ return (int) strtol (__nptr, (char **) NULL, 10); } +extern __inline long int atol (__const char *__nptr) +{ return strtol (__nptr, (char **) NULL, 10); } +#endif /* Optimizing GCC >=2. */ + + +/* Return a random integer between 0 and RAND_MAX inclusive. */ +extern int rand __P ((void)); +/* Seed the random number generator with the given number. */ +extern void srand __P ((unsigned int __seed)); + +/* These are the functions that actually do things. The `random', `srandom', + `initstate' and `setstate' functions are those from BSD Unices. + The `rand' and `srand' functions are required by the ANSI standard. + We provide both interfaces to the same random number generator. */ +/* Return a random long integer between 0 and RAND_MAX inclusive. */ +extern long int __random __P ((void)); +/* Seed the random number generator with the given number. */ +extern void __srandom __P ((unsigned int __seed)); + +/* Initialize the random number generator to use state buffer STATEBUF, + of length STATELEN, and seed it with SEED. Optimal lengths are 8, 16, + 32, 64, 128 and 256, the bigger the better; values less than 8 will + cause an error and values greater than 256 will be rounded down. */ +extern __ptr_t __initstate __P ((unsigned int __seed, __ptr_t __statebuf, + size_t __statelen)); +/* Switch the random number generator to state buffer STATEBUF, + which should have been previously initialized by `initstate'. */ +extern __ptr_t __setstate __P ((__ptr_t __statebuf)); + +#ifdef __USE_BSD +extern long int random __P ((void)); +extern void srandom __P ((unsigned int __seed)); +extern __ptr_t initstate __P ((unsigned int __seed, __ptr_t __statebuf, + size_t __statelen)); +extern __ptr_t setstate __P ((__ptr_t __statebuf)); + +#if defined (__OPTIMIZE__) && __GNUC__ >= 2 +extern __inline long int random (void) +{ return __random(); } +extern __inline void srandom (unsigned int __seed) +{ __srandom(__seed); } +extern __inline __ptr_t initstate (unsigned int __seed, + __ptr_t __statebuf, size_t __statelen) +{ return __initstate (__seed, __statebuf, __statelen); } +extern __inline __ptr_t setstate (__ptr_t __statebuf) +{ return __setstate (__statebuf); } +#endif /* Optimizing GCC >=2. */ +#endif /* Use BSD. */ + + +/* Allocate SIZE bytes of memory. */ +extern __ptr_t malloc __P ((size_t __size)); +/* Re-allocate the previously allocated block + in __ptr_t, making the new block SIZE bytes long. */ +extern __ptr_t realloc __P ((__ptr_t __ptr, size_t __size)); +/* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */ +extern __ptr_t calloc __P ((size_t __nmemb, size_t __size)); +/* Free a block allocated by `malloc', `realloc' or `calloc'. */ +extern void free __P ((__ptr_t __ptr)); + +#ifdef __USE_MISC +/* Free a block. An alias for `free'. (Sun Unices). */ +extern void cfree __P ((__ptr_t __ptr)); +#endif /* Use misc. */ + +#if defined(__USE_GNU) || defined(__USE_BSD) || defined(__USE_MISC) +#include <alloca.h> +#endif /* Use GNU, BSD, or misc. */ + +#ifdef __USE_BSD +/* Allocate SIZE bytes on a page boundary. The storage cannot be freed. */ +extern __ptr_t valloc __P ((size_t __size)); +#endif + + +/* Abort execution and generate a core-dump. */ +extern void abort __P ((void)) __attribute__ ((__noreturn__)); + + +/* Register a function to be called when `exit' is called. */ +extern int atexit __P ((void (*__func) (void))); + +#ifdef __USE_MISC +/* Register a function to be called with the status + given to `exit' and the given argument. */ +extern int on_exit __P ((void (*__func) (int __status, __ptr_t __arg), + __ptr_t __arg)); +#endif + +/* Call all functions registered with `atexit' and `on_exit', + in the reverse of the order in which they were registered + perform stdio cleanup, and terminate program execution with STATUS. */ +extern void exit __P ((int __status)) __attribute__ ((__noreturn__)); + + +/* Return the value of envariable NAME, or NULL if it doesn't exist. */ +extern char *getenv __P ((__const char *__name)); + +#ifdef __USE_SVID +/* The SVID says this is in <stdio.h>, but this seems a better place. */ +/* Put STRING, which is of the form "NAME=VALUE", in the environment. + If there is no `=', remove NAME from the environment. */ +extern int putenv __P ((__const char *__string)); +#endif + +#ifdef __USE_BSD +/* Set NAME to VALUE in the environment. + If REPLACE is nonzero, overwrite an existing value. */ +extern int setenv __P ((__const char *__name, __const char *__value, + int __replace)); +#endif + +/* Execute the given line as a shell command. */ +extern int system __P ((__const char *__command)); + + +/* Shorthand for type of comparison functions. */ +typedef int (*__compar_fn_t) __P ((__const __ptr_t, __const __ptr_t)); + +#ifdef __USE_GNU +typedef __compar_fn_t comparison_fn_t; +#endif + +/* Do a binary search for KEY in BASE, which consists of NMEMB elements + of SIZE bytes each, using COMPAR to perform the comparisons. */ +extern __ptr_t bsearch __P ((__const __ptr_t __key, __const __ptr_t __base, + size_t __nmemb, size_t __size, + __compar_fn_t __compar)); + +/* Sort NMEMB elements of BASE, of SIZE bytes each, + using COMPAR to perform the comparisons. */ +extern void qsort __P ((__ptr_t __base, size_t __nmemb, size_t __size, + __compar_fn_t __compar)); + + +#ifndef __CONSTVALUE +#ifdef __GNUC__ +/* The `const' keyword tells GCC that a function's return value is + based solely on its arguments, and there are no side-effects. */ +#define __CONSTVALUE __const +#else +#define __CONSTVALUE +#endif /* GCC. */ +#endif /* __CONSTVALUE not defined. */ + +/* Return the absolute value of X. */ +extern __CONSTVALUE int abs __P ((int __x)); +extern __CONSTVALUE long int labs __P ((long int __x)); + + +/* Return the `div_t' or `ldiv_t' representation + of the value of NUMER over DENOM. */ +/* GCC may have built-ins for these someday. */ +extern __CONSTVALUE div_t div __P ((int __numer, int __denom)); +extern __CONSTVALUE ldiv_t ldiv __P ((long int __numer, long int __denom)); + + +/* Return the length of the multibyte character + in S, which is no longer than N. */ +extern int mblen __P ((__const char *__s, size_t __n)); +/* Return the length of the given multibyte character, + putting its `wchar_t' representation in *PWC. */ +extern int mbtowc __P ((wchar_t * __pwc, __const char *__s, size_t __n)); +/* Put the multibyte character represented + by WCHAR in S, returning its length. */ +extern int wctomb __P ((char *__s, wchar_t __wchar)); + +#if defined (__OPTIMIZE__) && __GNUC__ >= 2 +extern __inline int mblen (__const char *__s, size_t __n) +{ return mbtowc ((wchar_t *) NULL, __s, __n); } +#endif /* Optimizing GCC >=2. */ + + +/* Convert a multibyte string to a wide char string. */ +extern size_t mbstowcs __P ((wchar_t * __pwcs, __const char *__s, size_t __n)); +/* Convert a wide char string to multibyte string. */ +extern size_t wcstombs __P ((char *__s, __const wchar_t * __pwcs, size_t __n)); + + +__END_DECLS + +#endif /* stdlib.h */ |