Prevent UB when n == 0 and (src == NULL or dest == NULL) */

r = (a + high*B^n) >> shift. Return the remainder r (0 <= r < 2^shift). 1 <= shift <= LIMB_BITS - 1 */

return -1, 0 or 1 */

execvpe is not available on non GNU systems */

the list must be sorted */

strcat and truncate. */

need_check_adv: false if the opcodes always advance the char pointer need_capture_init: true if all the captures in the atom are not set */

run a test when called by test262-harness+eshost */