Function regexec
pub unsafe extern "C" fn regexec(preg: *const regex_t, input: *const c_char, nmatch: size_t, pmatch: *mut regmatch_t, eflags: c_int) -> c_intregexecpub unsafe extern "C" fn regexec(preg: *const regex_t, input: *const c_char, nmatch: size_t, pmatch: *mut regmatch_t, eflags: c_int) -> c_int