int bcmp (const void *, const void *, size_t);
void bcopy (const void *, void *, size_t);
void bzero (void *, size_t);
int bcmp (const void *, const void *, size_t);
void bcopy (const void *, void *, size_t);
void bzero (void *, size_t);
char *index (const char *, int);
char *rindex (const char *, int);
char *index (const char *, int);
char *rindex (const char *, int);
int strcasecmp (const char *, const char *);
int strncasecmp (const char *, const char *, size_t);
int strcasecmp (const char *, const char *);
int strncasecmp (const char *, const char *, size_t);