longest_match
s->match_length = longest_match (s, hash_head);
s->match_length = longest_match (s, hash_head);
local int longest_match OF((deflate_state *s, IPos cur_match));
s->match_length = longest_match(s, hash_head);
s->match_length = longest_match(s, hash_head);
uInt longest_match OF((deflate_state *s, IPos cur_match));
local uInt longest_match OF((deflate_state *s, IPos cur_match));