musl/include/stdlib.h

#ifndef _STDLIB_H
#define _STDLIB_H

#ifdef __cplusplus
extern "C" {
#endif

#if __STDC_VERSION__ >= 199901L
#define __restrict restrict
#elif !defined(__GNUC__)
#define __restrict
#endif

#if __STDC_VERSION__ >= 201112L
#elif defined(__GNUC__)
#define _Noreturn __attribute__((__noreturn__))
#else
#define _Noreturn
#endif

#undef NULL
#ifdef __cplusplus
#define NULL 0
#else
#define NULL ((void*)0)
#endif

#define __NEED_size_t
#define __NEED_wchar_t

#include <bits/alltypes.h>

int atoi (const char *);
long atol (const char *);
long long atoll (const char *);
double atof (const char *);

float strtof (const char *__restrict, char **__restrict);
double strtod (const char *__restrict, char **__restrict);
long double strtold (const char *__restrict, char **__restrict);

long strtol (const char *__restrict, char **__restrict, int);
unsigned long strtoul (const char *__restrict, char **__restrict, int);
long long strtoll (const char *__restrict, char **__restrict, int);
unsigned long long strtoull (const char *__restrict, char **__restrict, int);

int rand (void);
void srand (unsigned);

void *malloc (size_t);
void *calloc (size_t, size_t);
void *realloc (void *, size_t);
void free (void *);
void *aligned_alloc(size_t alignment, size_t size);

_Noreturn void abort (void);
int atexit (void (*) (void));
_Noreturn void exit (int);
_Noreturn void _Exit (int);
int at_quick_exit (void (*) (void));
_Noreturn void quick_exit (int);

char *getenv (const char *);

int system (const char *);

void *bsearch (const void *, const void *, size_t, size_t, int (*)(const void *, const void *));
void qsort (void *, size_t, size_t, int (*)(const void *, const void *));

int abs (int);
long labs (long);
long long llabs (long long);

typedef struct { int quot, rem; } div_t;
typedef struct { long quot, rem; } ldiv_t;
typedef struct { long long quot, rem; } lldiv_t;

div_t div (int, int);
ldiv_t ldiv (long, long);
lldiv_t lldiv (long long, long long);

int mblen (const char *, size_t);
int mbtowc (wchar_t *__restrict, const char *__restrict, size_t);
int wctomb (char *, wchar_t);
size_t mbstowcs (wchar_t *__restrict, const char *__restrict, size_t);
size_t wcstombs (char *__restrict, const wchar_t *__restrict, size_t);

#define EXIT_FAILURE 1
#define EXIT_SUCCESS 0

#define MB_CUR_MAX ((size_t)+4)

#define RAND_MAX (0x7fffffff)


#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
 || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) \
 || defined(_BSD_SOURCE)

#ifndef WEXITSTATUS
#define WEXITSTATUS(s) (((s) & 0xff00) >> 8)
#define WTERMSIG(s) ((s) & 0x7f)
#define WSTOPSIG(s) WEXITSTATUS(s)
#define WCOREDUMP(s) ((s) & 0x80)
#define WIFEXITED(s) (!WTERMSIG(s))
#define WIFSTOPPED(s) (((s) & 0xff) == 0x7f)
#define WIFSIGNALED(s) (((signed char) (((s) & 0x7f) + 1) >> 1) > 0)
#define WIFCONTINUED(s) ((s) == 0xffff)
#endif

int posix_memalign (void **, size_t, size_t);
int setenv (const char *, const char *, int);
int unsetenv (const char *);
int mkstemp (char *);
char *mkdtemp (char *);
int getsubopt (char **, char *const *, char **);
int rand_r (unsigned *);

#endif


#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) \
 || defined(_BSD_SOURCE)
char *realpath (const char *__restrict, char *__restrict);
long int random (void);
void srandom (unsigned int);
char *initstate (unsigned int, char *, size_t);
char *setstate (char *);
#endif

#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
int putenv (char *);
int posix_openpt (int);
int grantpt (int);
int unlockpt (int);
char *ptsname (int);
char *l64a (long);
long a64l (const char *);
void setkey (const char *);
double drand48 (void);
double erand48 (unsigned short [3]);
long int lrand48 (void);
long int nrand48 (unsigned short [3]);
long mrand48 (void);
long jrand48 (unsigned short [3]);
void srand48 (long);
unsigned short *seed48 (unsigned short [3]);
void lcong48 (unsigned short [7]);
#endif

#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
#include <alloca.h>
char *mktemp (char *);
void *valloc (size_t);
void *memalign(size_t, size_t);
#endif

#ifdef _GNU_SOURCE
int clearenv(void);
int ptsname_r(int, char *, size_t);
char *ecvt(double, int, int *, int *);
char *fcvt(double, int, int *, int *);
char *gcvt(double, int, char *);
#endif

#if defined(_LARGEFILE64_SOURCE) || defined(_GNU_SOURCE)
#define mkstemp64 mkstemp
#endif

#ifdef __cplusplus
}
#endif

#endif