/* stdlib.h: General utilities header. */

#ifndef _STDLIB_H
#define _STDLIB_H

#include <bits/attrs.h>
#include <stddef.h>

/* The result of a division operation on two integers. */
typedef struct
{
    int quot;
    int rem;
} div_t;

/* The result of a division operation on two long integers. */
typedef struct
{
    long quot;
    long rem;
} ldiv_t;

/* The result of a division operation on two long long integers. */
typedef struct
{
    long long quot;
    long long rem;
} lldiv_t;

#ifdef __cplusplus
extern "C"
{
#endif

    /* Returns the absolute value of v. */
    int abs(int v);

    /* Returns the absolute value of v. */
    long labs(long v);

    /* Returns the absolute value of v. */
    long long llabs(long long v);

    /* Returns the result of dividing num by den, including the remainder. */
    div_t div(int num, int den);

    /* Returns the result of dividing num by den, including the remainder. */
    ldiv_t ldiv(long, long);

    /* Returns the result of dividing num by den, including the remainder. */
    lldiv_t lldiv(long long, long long);

    void* malloc(size_t);
    void* calloc(size_t, size_t);
    void* realloc(void*, size_t);
    void free(void*);

    /* Aborts the program without performing any normal cleanup. */
    __noreturn void abort();

    /* Registers a handler to be run at normal program termination. */
    int atexit(void (*func)(void));

    /* Parses a decimal integer from the provided string. */
    int atoi(const char* s);

    /* Parses a decimal integer from the provided string. */
    long atol(const char* s);

    /* Parses a decimal integer from the provided string. */
    long long atoll(const char* s);

    double atof(const char*);

    double strtod(const char*, char**);

    /* Parses an integer of the specified base from the string str, storing the first non-number character in endptr if
     * nonnull. */
    long strtol(const char* str, char** endptr, int base);

    /* Parses an unsigned integer of the specified base from the string str, storing the first non-number character in
     * endptr if nonnull. */
    unsigned long strtoul(const char* str, char** endptr, int base);

    int rand();
    void srand(int);

    /* Exits the program normally, performing any registered cleanup actions. */
    __noreturn void exit(int);

    /* Exits the program abnormally, without performing any registered cleanup actions. */
    __noreturn void _Exit(int);

    int system(const char*);

    char* getenv(const char*);

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

#ifdef __cplusplus
}
#endif

#endif