542 lines
20 KiB
C
542 lines
20 KiB
C
/* Copyright (C) 1991, 92, 93, 94, 95, 96 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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/*
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* ANSI Standard: 4.10 GENERAL UTILITIES <stdlib.h>
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*/
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#ifndef _STDLIB_H
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#define _STDLIB_H 1
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#include <features.h>
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/* Get size_t, wchar_t and NULL from <stddef.h>. */
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#define __need_size_t
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#define __need_wchar_t
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#define __need_NULL
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#include <stddef.h>
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#define __need_Emath
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#include <errno.h>
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__BEGIN_DECLS
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/* Returned by `div'. */
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typedef struct
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{
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int quot; /* Quotient. */
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int rem; /* Remainder. */
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} div_t;
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/* Returned by `ldiv'. */
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typedef struct
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{
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long int quot; /* Quotient. */
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long int rem; /* Remainder. */
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} ldiv_t;
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#ifdef __USE_GNU
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/* Returned by `lldiv'. */
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typedef struct
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{
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long long int quot; /* Quotient. */
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long long int rem; /* Remainder. */
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} lldiv_t;
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#endif
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/* The largest number rand will return (same as INT_MAX). */
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#define RAND_MAX 2147483647
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/* We define these the same for all machines.
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Changes from this to the outside world should be done in `_exit'. */
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#define EXIT_FAILURE 1 /* Failing exit status. */
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#define EXIT_SUCCESS 0 /* Successful exit status. */
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/* Maximum length of a multibyte character in the current locale. */
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#define MB_CUR_MAX (__ctype_get_mb_cur_max ())
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extern int __ctype_get_mb_cur_max __P ((void));
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/* Convert a string to a floating-point number. */
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extern double atof __P ((__const char *__nptr));
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/* Convert a string to an integer. */
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extern int atoi __P ((__const char *__nptr));
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/* Convert a string to a long integer. */
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extern long int atol __P ((__const char *__nptr));
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/* Convert a string to a floating-point number. */
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extern double strtod __P ((__const char *__nptr, char **__endptr));
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#ifdef __USE_GNU
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/* Likewise for `float' and `long double' sizes of floating-point numbers. */
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extern float strtof __P ((__const char *__nptr, char **__endptr));
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extern __long_double_t strtold __P ((__const char *__nptr, char **__endptr));
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#endif
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/* Convert a string to a long integer. */
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extern long int strtol __P ((__const char *__nptr, char **__endptr,
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int __base));
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/* Convert a string to an unsigned long integer. */
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extern unsigned long int strtoul __P ((__const char *__nptr,
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char **__endptr, int __base));
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#if defined (__GNUC__) && defined (__USE_BSD)
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/* Convert a string to a quadword integer. */
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extern long long int strtoq __P ((__const char *__nptr, char **__endptr,
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int __base));
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/* Convert a string to an unsigned quadword integer. */
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extern unsigned long long int strtouq __P ((__const char *__nptr,
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char **__endptr, int __base));
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#endif /* GCC and use BSD. */
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#if defined (__GNUC__) && defined (__USE_MISC)
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/* Convert a string to a quadword integer. */
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extern long long int strtoll __P ((__const char *__nptr, char **__endptr,
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int __base));
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/* Convert a string to an unsigned quadword integer. */
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extern unsigned long long int strtoull __P ((__const char *__nptr,
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char **__endptr, int __base));
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#endif /* GCC and use MISC. */
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/* The internal entry points for `strtoX' take an extra flag argument
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saying whether or not to parse locale-dependent number grouping. */
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extern double __strtod_internal __P ((__const char *__nptr,
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char **__endptr, int __group));
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extern float __strtof_internal __P ((__const char *__nptr, char **__endptr,
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int __group));
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extern __long_double_t __strtold_internal __P ((__const char *__nptr,
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char **__endptr, int __group));
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extern long int __strtol_internal __P ((__const char *__nptr, char **__endptr,
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int __base, int __group));
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extern unsigned long int __strtoul_internal __P ((__const char *__nptr,
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char **__endptr, int __base,
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int __group));
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#ifdef __GNUC__
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extern long long int __strtoq_internal __P ((__const char *__nptr,
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char **__endptr, int __base,
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int __group));
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extern unsigned long long int __strtouq_internal __P ((__const char *__nptr,
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char **__endptr,
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int __base,
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int __group));
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#endif /* GCC */
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#if defined (__OPTIMIZE__) && __GNUC__ >= 2
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/* Define inline functions which call the internal entry points. */
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extern __inline double strtod (__const char *__nptr, char **__endptr)
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{ return __strtod_internal (__nptr, __endptr, 0); }
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extern __inline long int strtol (__const char *__nptr,
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char **__endptr, int __base)
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{ return __strtol_internal (__nptr, __endptr, __base, 0); }
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extern __inline unsigned long int strtoul (__const char *__nptr,
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char **__endptr, int __base)
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{ return __strtoul_internal (__nptr, __endptr, __base, 0); }
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#ifdef __USE_GNU
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extern __inline float strtof (__const char *__nptr, char **__endptr)
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{ return __strtof_internal (__nptr, __endptr, 0); }
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extern __inline __long_double_t strtold (__const char *__nptr, char **__endptr)
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{ return __strtold_internal (__nptr, __endptr, 0); }
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#endif
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#ifdef __USE_BSD
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extern __inline long long int strtoq (__const char *__nptr, char **__endptr,
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int __base)
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{ return __strtoq_internal (__nptr, __endptr, __base, 0); }
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extern __inline unsigned long long int strtouq (__const char *__nptr,
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char **__endptr, int __base)
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{ return __strtouq_internal (__nptr, __endptr, __base, 0); }
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#endif
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#ifdef __USE_MISC
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extern __inline long long int strtoll (__const char *__nptr, char **__endptr,
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int __base)
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{ return __strtoq_internal (__nptr, __endptr, __base, 0); }
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extern __inline unsigned long long int strtoull (__const char *__nptr,
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char **__endptr, int __base)
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{ return __strtouq_internal (__nptr, __endptr, __base, 0); }
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#endif
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extern __inline double atof (__const char *__nptr)
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{ return strtod (__nptr, (char **) NULL); }
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extern __inline int atoi (__const char *__nptr)
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{ return (int) strtol (__nptr, (char **) NULL, 10); }
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extern __inline long int atol (__const char *__nptr)
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{ return strtol (__nptr, (char **) NULL, 10); }
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#endif /* Optimizing GCC >=2. */
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#ifdef __USE_SVID
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/* Convert N to base 64 using the digits "./0-9A-Za-z", least-significant
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digit first. Returns a pointer to static storage overwritten by the
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next call. */
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extern char *l64a __P ((long int __n));
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/* Read a number from a string in base 64 as above. */
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extern long int a64l __P ((const char *));
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#endif
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/* Return a random integer between 0 and RAND_MAX inclusive. */
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extern int rand __P ((void));
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/* Seed the random number generator with the given number. */
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extern void srand __P ((unsigned int __seed));
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#ifdef __USE_BSD
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#include <sys/types.h> /* we need int32_t... */
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/* These are the functions that actually do things. The `random', `srandom',
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`initstate' and `setstate' functions are those from BSD Unices.
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The `rand' and `srand' functions are required by the ANSI standard.
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We provide both interfaces to the same random number generator. */
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/* Return a random long integer between 0 and RAND_MAX inclusive. */
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extern int32_t __random __P ((void));
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/* Seed the random number generator with the given number. */
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extern void __srandom __P ((unsigned int __seed));
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/* Initialize the random number generator to use state buffer STATEBUF,
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of length STATELEN, and seed it with SEED. Optimal lengths are 8, 16,
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32, 64, 128 and 256, the bigger the better; values less than 8 will
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cause an error and values greater than 256 will be rounded down. */
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extern __ptr_t __initstate __P ((unsigned int __seed, __ptr_t __statebuf,
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size_t __statelen));
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/* Switch the random number generator to state buffer STATEBUF,
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which should have been previously initialized by `initstate'. */
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extern __ptr_t __setstate __P ((__ptr_t __statebuf));
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extern int32_t random __P ((void));
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extern void srandom __P ((unsigned int __seed));
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extern __ptr_t initstate __P ((unsigned int __seed, __ptr_t __statebuf,
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size_t __statelen));
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extern __ptr_t setstate __P ((__ptr_t __statebuf));
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#if defined (__OPTIMIZE__) && __GNUC__ >= 2
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extern __inline int32_t random (void)
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{ return __random(); }
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extern __inline void srandom (unsigned int __seed)
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{ __srandom(__seed); }
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extern __inline __ptr_t initstate (unsigned int __seed,
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__ptr_t __statebuf, size_t __statelen)
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{ return __initstate (__seed, __statebuf, __statelen); }
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extern __inline __ptr_t setstate (__ptr_t __statebuf)
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{ return __setstate (__statebuf); }
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#endif /* Optimizing GCC >=2. */
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#ifdef __USE_REENTRANT
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/* Reentrant versions of the `random' family of functions.
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These functions all use the following data structure to contain
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state, rather than global state variables. */
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struct random_data
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{
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int32_t *fptr; /* Front pointer. */
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int32_t *rptr; /* Rear pointer. */
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int32_t *state; /* Array of state values. */
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int rand_type; /* Type of random number generator. */
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int rand_deg; /* Degree of random number generator. */
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int rand_sep; /* Distance between front and rear. */
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int32_t *end_ptr; /* Pointer behind state table. */
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};
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extern int __random_r __P ((struct random_data *__buf, int32_t *__result));
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extern int random_r __P ((struct random_data *__buf, int32_t *__result));
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extern int __srandom_r __P ((unsigned int __seed, struct random_data *__buf));
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extern int __initstate_r __P ((unsigned int __seed, __ptr_t __statebuf,
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size_t __statelen, struct random_data *__buf));
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extern int __setstate_r __P ((__ptr_t __statebuf, struct random_data *__buf));
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extern int srandom_r __P ((unsigned int __seed, struct random_data *__buf));
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extern int initstate_r __P ((unsigned int __seed, __ptr_t __statebuf,
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size_t __statelen, struct random_data *__buf));
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extern int setstate_r __P ((__ptr_t __statebuf, struct random_data *__buf));
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#endif /* __USE_REENTRANT. */
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#endif /* Use BSD. */
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#ifdef __USE_SVID
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/* System V style 48-bit random number generator functions. */
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/* Data structure for communication with thread safe versions. */
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struct drand48_data
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{
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unsigned short int X[3]; /* Current state. */
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unsigned short int a[3]; /* Factor in congruential formula. */
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unsigned short int c; /* Additive const. in congruential formula. */
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unsigned short int old_X[3]; /* Old state. */
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int init; /* Flag for initializing. */
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};
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/* Return non-negative, double-precision floating-point value in [0.0,1.0). */
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extern double drand48 __P ((void));
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extern int drand48_r __P ((struct drand48_data *__buffer, double *__result));
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extern double erand48 __P ((unsigned short int __xsubi[3]));
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extern int erand48_r __P ((unsigned short int __xsubi[3],
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struct drand48_data *__buffer, double *__result));
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/* Return non-negative, long integer in [0,2^31). */
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extern long lrand48 __P ((void));
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extern int lrand48_r __P ((struct drand48_data *__buffer, long *__result));
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extern long nrand48 __P ((unsigned short int __xsubi[3]));
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extern int nrand48_r __P ((unsigned short int __xsubi[3],
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struct drand48_data *__buffer, long *__result));
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/* Return signed, long integers in [-2^31,2^31). */
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extern long mrand48 __P ((void));
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extern int mrand48_r __P ((struct drand48_data *__buffer, long *__result));
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extern long jrand48 __P ((unsigned short int __xsubi[3]));
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extern int jrand48_r __P ((unsigned short int __xsubi[3],
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struct drand48_data *__buffer, long *__result));
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/* Seed random number generator. */
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extern void srand48 __P ((long __seedval));
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extern int srand48_r __P ((long __seedval, struct drand48_data *__buffer));
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extern unsigned short int *seed48 __P ((unsigned short int __seed16v[3]));
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extern int seed48_r __P ((unsigned short int __seed16v[3],
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struct drand48_data *__buffer));
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extern void lcong48 __P ((unsigned short int __param[7]));
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extern int lcong48_r __P ((unsigned short int __param[7],
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struct drand48_data *__buffer));
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/* Internal function to compute next state of the generator. */
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extern int __drand48_iterate __P ((unsigned short int __xsubi[3],
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struct drand48_data *__buffer));
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#endif /* __USE_SVID. */
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/* Allocate SIZE bytes of memory. */
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extern __ptr_t malloc __P ((size_t __size));
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/* Re-allocate the previously allocated block
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in __ptr_t, making the new block SIZE bytes long. */
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extern __ptr_t realloc __P ((__ptr_t __ptr, size_t __size));
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/* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */
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extern __ptr_t calloc __P ((size_t __nmemb, size_t __size));
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/* Free a block allocated by `malloc', `realloc' or `calloc'. */
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extern void free __P ((__ptr_t __ptr));
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#ifdef __USE_MISC
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/* Free a block. An alias for `free'. (Sun Unices). */
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extern void cfree __P ((__ptr_t __ptr));
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#endif /* Use misc. */
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#if defined(__USE_GNU) || defined(__USE_BSD) || defined(__USE_MISC)
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#include <alloca.h>
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#endif /* Use GNU, BSD, or misc. */
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#ifdef __USE_BSD
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/* Allocate SIZE bytes on a page boundary. The storage cannot be freed. */
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extern __ptr_t valloc __P ((size_t __size));
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#endif
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/* Abort execution and generate a core-dump. */
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extern void abort __P ((void)) __attribute__ ((__noreturn__));
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/* Register a function to be called when `exit' is called. */
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extern int atexit __P ((void (*__func) (void)));
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#ifdef __USE_MISC
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/* Register a function to be called with the status
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given to `exit' and the given argument. */
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extern int on_exit __P ((void (*__func) (int __status, __ptr_t __arg),
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__ptr_t __arg));
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#endif
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/* Call all functions registered with `atexit' and `on_exit',
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in the reverse of the order in which they were registered
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perform stdio cleanup, and terminate program execution with STATUS. */
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extern void exit __P ((int __status)) __attribute__ ((__noreturn__));
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/* Return the value of envariable NAME, or NULL if it doesn't exist. */
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extern char *getenv __P ((__const char *__name));
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#ifdef __USE_SVID
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/* The SVID says this is in <stdio.h>, but this seems a better place. */
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/* Put STRING, which is of the form "NAME=VALUE", in the environment.
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If there is no `=', remove NAME from the environment. */
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extern int putenv __P ((__const char *__string));
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#endif
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#ifdef __USE_BSD
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/* Set NAME to VALUE in the environment.
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If REPLACE is nonzero, overwrite an existing value. */
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extern int setenv __P ((__const char *__name, __const char *__value,
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int __replace));
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/* Remove the variable NAME from the environment. */
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extern void unsetenv __P ((__const char *__name));
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#endif
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/* Execute the given line as a shell command. */
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extern int system __P ((__const char *__command));
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#ifdef __USE_GNU
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/* Return a malloc'd string containing the canonical absolute name of the
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named file. The last file name component need not exist, and may be a
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symlink to a nonexistent file. */
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extern char *canonicalize_file_name __P ((__const char *__name));
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#endif
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#ifdef __USE_BSD
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/* Return the canonical absolute name of file NAME. The last file name
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component need not exist, and may be a symlink to a nonexistent file.
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If RESOLVED is null, the result is malloc'd; otherwise, if the canonical
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name is PATH_MAX chars or more, returns null with `errno' set to
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ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars, returns the
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name in RESOLVED. */
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extern char *realpath __P ((__const char *__name, char *__resolved));
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#endif
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/* Shorthand for type of comparison functions. */
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#ifndef __COMPAR_FN_T
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#define __COMPAR_FN_T
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typedef int (*__compar_fn_t) __P ((__const __ptr_t, __const __ptr_t));
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#endif
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#ifdef __USE_GNU
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typedef __compar_fn_t comparison_fn_t;
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#endif
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/* Do a binary search for KEY in BASE, which consists of NMEMB elements
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of SIZE bytes each, using COMPAR to perform the comparisons. */
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extern __ptr_t bsearch __P ((__const __ptr_t __key, __const __ptr_t __base,
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size_t __nmemb, size_t __size,
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__compar_fn_t __compar));
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/* Sort NMEMB elements of BASE, of SIZE bytes each,
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using COMPAR to perform the comparisons. */
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extern void qsort __P ((__ptr_t __base, size_t __nmemb, size_t __size,
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__compar_fn_t __compar));
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/* Return the absolute value of X. */
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extern int abs __P ((int __x)) __attribute__ ((__const__));
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extern long int labs __P ((long int __x)) __attribute__ ((__const__));
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#ifdef __USE_GNU
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extern long long int llabs __P ((long long int __x)) __attribute__ ((__const__));
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#endif
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/* Return the `div_t', `ldiv_t' or `lldiv_t' representation
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of the value of NUMER over DENOM. */
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/* GCC may have built-ins for these someday. */
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extern div_t div __P ((int __numer, int __denom)) __attribute__ ((__const__));
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extern ldiv_t ldiv __P ((long int __numer, long int __denom)) __attribute__ ((__const__));
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#ifdef __USE_GNU
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extern lldiv_t lldiv __P ((long long int __numer, long long int __denom)) __attribute__ ((__const__));
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#endif
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#ifdef __USE_SVID
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/* Convert floating point numbers to strings. The returned values are
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valid only until another call to the same function. */
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/* Convert VALUE to a string with NDIGIT digits and return a pointer to
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this. Set *DECPT with the position of the decimal character and *SIGN
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with the sign of the number. */
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char *ecvt __P ((double __value, int __ndigit, int *__decpt, int *sign));
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/* Convert VALUE to a string rounded to NDIGIT decimal digits. Set *DECPT
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with the position of the decimal character and *SIGN with the sign of
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the number. */
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char *fcvt __P ((double __value, int __ndigit, int *__decpt, int *sign));
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/* If possible convert VALUE to a string with NDIGIT significant digits.
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Otherwise use exponential representation. The resulting string will
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be written to BUF. */
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char *gcvt __P ((double __value, int __ndigit, char *__buf));
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/* Long double versions of above functions. */
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char *qecvt __P ((__long_double_t __value, int __ndigit, int *__decpt,
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int *sign));
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char *qfcvt __P ((__long_double_t __value, int __ndigit, int *__decpt,
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int *sign));
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char *qgcvt __P ((__long_double_t __value, int __ndigit, char *__buf));
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#ifdef __USE_REENTRANT
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/* Reentrant version of the functions above which provide their own
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buffers. */
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int ecvt_r __P ((double __value, int __ndigit, int *__decpt, int *sign,
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char *__buf, size_t __len));
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int fcvt_r __P ((double __value, int __ndigit, int *__decpt, int *sign,
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char *__buf, size_t __len));
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int qecvt_r __P ((__long_double_t __value, int __ndigit, int *__decpt,
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int *sign, char *__buf, size_t __len));
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int qfcvt_r __P ((__long_double_t __value, int __ndigit, int *__decpt,
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int *sign, char *__buf, size_t __len));
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#endif
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#endif
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/* Return the length of the multibyte character
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in S, which is no longer than N. */
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extern int mblen __P ((__const char *__s, size_t __n));
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/* Return the length of the given multibyte character,
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putting its `wchar_t' representation in *PWC. */
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extern int mbtowc __P ((wchar_t * __pwc, __const char *__s, size_t __n));
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/* Put the multibyte character represented
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by WCHAR in S, returning its length. */
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extern int wctomb __P ((char *__s, wchar_t __wchar));
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#if defined (__OPTIMIZE__) && __GNUC__ >= 2
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extern __inline int mblen (__const char *__s, size_t __n)
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{ return mbtowc ((wchar_t *) NULL, __s, __n); }
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#endif /* Optimizing GCC >=2. */
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/* Convert a multibyte string to a wide char string. */
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extern size_t mbstowcs __P ((wchar_t * __pwcs, __const char *__s, size_t __n));
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/* Convert a wide char string to multibyte string. */
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extern size_t wcstombs __P ((char *__s, __const wchar_t * __pwcs, size_t __n));
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#ifdef __USE_SVID
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/* Determine whether the string value of RESPONSE matches the affirmation
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or negative response expression as specified by the LC_MESSAGES category
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in the program's current locale. Returns 1 if affirmative, 0 if
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negative, and -1 if not matching. */
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extern int rpmatch __P ((__const char *__response));
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#endif
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#ifdef __USE_MISC
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/* Parse comma separated suboption from *OPTIONP and match against
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strings in TOKENS. If found return index and set *VALUEP to
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optional value introduced by an equal sign. If the suboption is
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not part of TOKENS return in *VALUEP beginning of unknown
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suboption. On exit *OPTIONP is set to the beginning of the next
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otken or at the terminating NUL character. */
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extern int getsubopt __P ((char **__optionp, __const char *__const *__tokens,
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char **__valuep));
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#endif
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__END_DECLS
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#endif /* stdlib.h */
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