int safe_strcasecmp (const char*, const char*);
int safe_strncmp (const char*, const char*, size_t);
int safe_strncasecmp (const char*, const char*, size_t);
int safe_strcoll (const char*, const char*);
int safe_strcasecmp (const char*, const char*);
int safe_strncmp (const char*, const char*, size_t);
int safe_strncasecmp (const char*, const char*, size_t);
int safe_strcoll (const char*, const char*);