check_match
check_match(s, s->strstart-1, s->prev_match, s->prev_length);
static void check_match (deflate_state *s, IPos start, IPos match,
check_match(s, s->strstart, s->match_start, s->match_length);
ret = check_match(m, par);
ret = check_match(m, par);
ret = check_match(net, im, mdata_len);
ASSERT_NE(-1, check_match(&self->check, x, y, &match)); \
ASSERT_NE(-1, check_match(&self->check, x, y, &match)); \