#pragma once
// Defines NULL
#include <stddef.h>

#if !defined(__STDC_LIB_EXT1__)
    #define __STDC_LIB_EXT1__
#endif

#ifdef __STDC_WANT_SECURE_LIB__
    #if !defined(__STDC_WANT_LIB_EXT1__)
        #define __STDC_WANT_LIB_EXT1__ 1
    #endif
#endif

// typedef struct div_t {
//     int quot;
//     int rem;
// } div_t;

// typedef struct ldiv_t {
//     long quot;
//     long rem;
// } ldiv_t;

// typedef struct lldiv_t {
//     long long quot;
//     long long rem;
// } lldiv_t;

// #define EXIT_FAILURE 1
// #define EXIT_SUCCESS 0

#define RAND_MAX 65536
// #define MB_CUR_MAX 5

double atof(const char *nptr);
int atoi(const char *nptr);
long int atol(const char *nptr);
long long int atoll(const char *nptr);
double strtod(const char * restrict nptr, char ** restrict endptr);
float strtof(const char * restrict nptr, char ** restrict endptr);
long double strtold(const char * restrict nptr, char ** restrict endptr);
long int strtol(const char *restrict nptr, char **restrict endptr, int base);
long long int strtoll(const char *restrict nptr, char **restrict endptr, int base);
unsigned long int strtoul(const char *restrict nptr, char **restrict endptr, int base);
unsigned long long int strtoull(const char *restrict nptr, char **restrict endptr, int base);
int rand(void);
void srand(unsigned int seed);

typedef struct _os_heap _os_heap;
void _heap_setup(_os_heap *heap);
void *aligned_alloc(size_t alignment, size_t size);
void *calloc(size_t nmemb, size_t size);
void free(void *ptr);
void *malloc(size_t size);
void *realloc(void *ptr, size_t size);

// _Noreturn void abort(void);
// int atexit(void (*func)(void));
// int at_quick_exit(void (*func)(void));
// _Noreturn void exit(int status);
// _Noreturn void _Exit(int status);
// char *getenv(const char *name);
// _Noreturn void quick_exit(int status);
// int system(const char *string);
// void *bsearch(const void *key, const void *base, size_t nmemb, size_t size, int (*compar)(const void *, const void *));
// void qsort(void *base, size_t nmemb, size_t size, int (*compar)(const void *, const void *));
// int abs(int j);
// long int labs(long int j);
// long long int llabs(long long int j);
// div_t div(int numer, int denom);
// ldiv_t ldiv(long int numer, long int denom);
// lldiv_t lldiv(long long int numer, long long int denom);
// int mblen(const char *s, size_t n);
// int mbtowc(wchar_t * restrict pwc, const char * restrict s, size_t n);
// int wctomb(char *s, wchar_t wchar);
// size_t mbstowcs(wchar_t * restrict pwcs, const char * restrict s, size_t n);
// size_t wcstombs(char * restrict s, const wchar_t * restrict pwcs, size_t n);

// #ifdef __STDC_WANT_LIB_EXT1__
// 	typedef void (*constraint_handler_t)(const char * restrict msg, void * restrict ptr, errno_t error);

// 	constraint_handler_t set_constraint_handler_s(constraint_handler_t handler);
// 	void abort_handler_s(const char * restrict msg, void * restrict ptr, errno_t error);
// 	void ignore_handler_s(const char * restrict msg, void * restrict ptr, errno_t error);
// 	errno_t getenv_s(size_t * restrict len, char * restrict value, rsize_t maxsize, const char * restrict name);
// #endif