type t_symbol = t_type Node.t
type tn_symbol = [ n_type | t_type ] Node.t
-type partial = Node of tn_symbol * partial array | Leaf of node
-
-
+type partial =
+ Leaf of node
+ | Node of tn_symbol * partial array
external is_nil : t -> t_symbol -> bool = "caml_grammar_is_nil"
+external nil_symbol : t -> t_symbol = "caml_grammar_nil_id"
external translate_tag : t -> Tag.t -> Tag.t = "caml_grammar_translate_tag"
external to_string : t -> Tag.t -> string = "caml_grammar_get_tag"
external register_tag : t -> string -> Tag.t = "caml_grammar_register_tag"
external first_child : t -> symbol -> node -> node = "caml_grammar_first_child"
external next_sibling : t -> symbol -> node -> node = "caml_grammar_next_sibling"
+external start_first_child : t -> node -> node = "caml_grammar_start_first_child"
+external start_next_sibling : t -> node -> node = "caml_grammar_start_next_sibling"
+
let is_non_terminal (n : [< any_type ] Node.t) =
let n = Node.to_int n in
;;
let tag = symbol_tag
let get_tag g (n : t_symbol) = to_string g (symbol_tag n)
-
+let symbol (n : n_symbol) = ((Node.to_int n) lsr 10) land 0x7ffffff
+;;
external parameter : [< any_type ] Node.t -> p_symbol = "%identity"
external get_id1 : t -> n_symbol -> tn_symbol = "caml_grammar_get_id1"
external get_id2 : t -> n_symbol -> tn_symbol = "caml_grammar_get_id2"
-external get_param_pos : t -> n_symbol -> int = "caml_grammar_get_param_pos"
-
+(*external get_param_pos : t -> n_symbol -> int = "caml_grammar_get_param_pos" *)
+let get_param_pos (n : n_symbol) =
+ let n = Node.to_int n in
+ (n lsr 6) land 0xf
let num_params (n : n_symbol) =
let n = Node.to_int n in
external load : Unix.file_descr -> bool -> t = "caml_grammar_load"
-let traversal g =
- let start_symbol = (Node.of_int 0) in
- let dummy_leaf = Leaf (Node.nil) in
- let rec start_loop idx =
- TRACE("grammar", 2, __ "start_loop %a\n%!" Node.print idx);
- if idx >= Node.null then begin
- let symbol = get_symbol_at g start_symbol idx in
- if is_terminal symbol then
- let () = ();TRACE("grammar", 2, __ "Symbol %a is terminal\n%!" Node.print symbol); in
- let ts = terminal symbol in
- if is_nil g ts then (TRACE("grammar", 2, __ "Symbol %a is nil\n%!" Node.print symbol)) else
-(* let str = get_tag g ts in
- Printf.printf "<%s>%!" str; *)
- let fs = first_child g start_symbol idx in
- start_loop fs;
- start_loop (next_sibling g start_symbol fs);
-(* Printf.printf "</%s>%!" str; *)
- else
- let tn = non_terminal symbol in
- let nparam = num_params tn in
- let child = ref (first_child g start_symbol idx) in
- let a_param = Array.init nparam
- (fun _ -> let c = !child in
- child := next_sibling g start_symbol c;
- Leaf c)
- in
- rule_loop tn a_param
- end
-
- and rule_loop (t : n_symbol) a_param =
- TRACE("grammar", 2, __ "rule_loop %a, (%i) \n%!" Node.print t (Array.length a_param));
- let id1 = get_id1 g t in
- let id2 = get_id2 g t in
- let param_pos = get_param_pos g t in
- let nparam1 = num_children id1 in
- let nparam2 = if is_terminal id2 && is_nil g (terminal id2) then 0 else num_children id2 in
- let a_param1 = Array.create nparam1 dummy_leaf in
- let a_param2 = Array.create nparam2 dummy_leaf in
- let i = param_pos - 2 in
- TRACE("grammar", 2, __ "id1: %i, id2: %i, param_pos: %i, nparam1: %i, nparam2: %i, i: %i\n%!"
- (Node.to_int id1) (Node.to_int id2) param_pos nparam1 nparam2 i);
-
- TRACE("grammar", 2, __ "blit a(%i) %i b(%i) %i %i\n%!"
- (Array.length a_param) 0 (Array.length a_param1) 0 (i+1));
-
- Array.blit a_param 0 a_param1 0 (i+1); (* Pass parameters before id2 *)
- a_param1.(i+1) <- Node(id2, a_param2); (* id2( ... ) *)
-
- TRACE("grammar", 2, __ "blit a(%i) %i b(%i) %i %i\n%!"
- (Array.length a_param) (i + nparam2 + 1) (Array.length a_param1) (i+2) (nparam1 - i - 2));
- Array.blit a_param (i + nparam2 + 1) a_param1 (i+2) (nparam1 - i - 2); (* Pass parameters after id2 *)
-
-
-
- TRACE("grammar", 2, __ "blit a(%i) %i b(%i) %i %i\n\n\n%!"
- (Array.length a_param) (i + 1) (Array.length a_param2) 0 (nparam2));
- Array.blit a_param (i + 1) a_param2 0 nparam2; (* parameters below id2 *)
- if is_non_terminal id1 then
- let id1 = non_terminal id1 in
- rule_loop id1 a_param1
- else
- let id1 = terminal id1 in
- terminal_loop id1 a_param1
-
- and terminal_loop (t : t_symbol) a_param =
- if is_nil g t then () else begin
-(* let str = get_tag g t in *)
-(* Printf.printf "<%s>%!" str; *)
- partial_loop a_param.(0);
- partial_loop a_param.(1)
-(* Printf.printf "</%s>%!" str *)
- end
- and partial_loop = function
- | Leaf id -> start_loop id
- | Node (id, a_param) ->
- if is_terminal id then terminal_loop (terminal id) a_param
- else rule_loop (non_terminal id) a_param
- in
-
- start_loop (Node.null)
-;;
-
-
let load filename bp =
let fd = Unix.openfile filename [ Unix.O_RDONLY ] 0o600 in