#pragma once

#include <stddef.h> // size_t

size_t strlen(const char *s);

size_t strnlen(const char *s, size_t n);

char *strchr(const char *s, int c);

char *strrchr(const char *s, int c);

char *strstr(const char *s1, const char *s2);

int strcmp(const char *p, const char *q);

int strncmp(const char *p, const char *q, size_t n);

int strcoll(const char *p, const char *q);

char *strcpy(char *dst, const char *src);

char *strncpy(char *dst, const char *src, size_t n);

char *stpcpy(char *dst, const char *src);

char *stpncpy(char *dst, const char *src, size_t n);

char *strcat(char *dst, const char *src);

char *strncat(char *dst, const char *src, size_t n);

char *strdup(const char *str);

char *strndup(const char *str, size_t size);

void *memcpy(void *dst, const void *src, size_t n);

void *memccpy(void *dst, const void *src, int c, size_t n);

void *memmove(void *dst, const void *src, size_t);

void *memset(void *buf, int val, size_t size);

void *memchr(const void *buf, int c, size_t n);

int memcmp(const void *buf1, const void *buf2, size_t n);

size_t strspn(const char *s, const char *accept);

size_t strcspn(const char *s, const char *reject);

char *strpbrk(const char *s, const char *accept);

char *strerror(int no);

int strerror_r(int no, char *dst, size_t n);

char *strtok(char *src, const char *delim);

char *strtok_r(char *src, const char *delim, char **ptr);