#include <cdefs.h>

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

void* memset(void* s, int c, size_t n);

int memcmp(const void* av, const void* bv, size_t len);

int memxcmp(const void* av, const void* bv, size_t len);

void memzero(void* a, size_t n);

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

int nonzero(void* a, size_t n);

char* strcbrk(char* str, char c);

int strcmp(const char* a, const char* b);

int natcmp(const char* a, const char* b);

char* strecbrk(char* p, char* e, char k);

size_t strlen(const char* a);

size_t strnlen(const char* a, size_t max);

int strncmp(const char* a, const char* b, size_t n);

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

char* strstr(const char* str, const char* sub);

char* strnstr(const char* str, const char* sub, size_t len);

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

char* strerev(char* p, char* e, char c);