444 static const char *lmemfind (const char *s1, size_t l1,  in lmemfind()  argument
447   else if (l2 > l1) return NULL;  /* avoids a negative `l1' */  in lmemfind()
451     l1 = l1-l2;  /* `s2' cannot be found after that */  in lmemfind()
452     while (l1 > 0 && (init = (const char *)memchr(s1, *s2, l1)) != NULL) {  in lmemfind()
457         l1 -= init-s1;  in lmemfind()
496   size_t l1, l2;  in str_find_aux()  local
497   const char *s = luaL_checklstring(L, 1, &l1);  in str_find_aux()
499   ptrdiff_t init = posrelat(luaL_optinteger(L, 3, 1), l1) - 1;  in str_find_aux()
501   else if ((size_t)(init) > l1) init = (ptrdiff_t)l1;  in str_find_aux()
505     const char *s2 = lmemfind(s+init, l1-init, p, l2);  in str_find_aux()
518     ms.src_end = s+l1;  in str_find_aux()