8 type node = [ `Grammar ] Node.t
10 type p_type = [ `Parameter ]
11 type n_type = [ `NonTerminal ]
12 type t_type = [ `Terminal ]
13 type any_type = [ p_type | n_type | t_type ]
14 type symbol = [ any_type ] Node.t
16 type p_symbol = p_type Node.t
17 type n_symbol = n_type Node.t
18 type t_symbol = t_type Node.t
19 type tn_symbol = [ n_type | t_type ] Node.t
21 type partial = Node of tn_symbol * partial array | Leaf of node
26 external is_nil : t -> t_symbol -> bool = "caml_grammar_is_nil"
27 external translate_tag : t -> Tag.t -> Tag.t = "caml_grammar_translate_tag"
28 external to_string : t -> Tag.t -> string = "caml_grammar_get_tag"
29 external register_tag : t -> string -> Tag.t = "caml_grammar_register_tag"
33 let tag_operations t = {
34 Tag.tag = (fun s -> register_tag t s);
35 Tag.to_string = (fun s -> to_string t s);
36 Tag.translate = (fun s -> translate_tag t s);
39 external get_symbol_at : t -> symbol -> node -> symbol = "caml_grammar_get_symbol_at"
40 external first_child : t -> symbol -> node -> node = "caml_grammar_first_child"
41 external next_sibling : t -> symbol -> node -> node = "caml_grammar_next_sibling"
44 let is_non_terminal (n : [< any_type ] Node.t) =
45 let n = Node.to_int n in
48 let is_terminal (n : [< any_type ] Node.t) =
49 let n = Node.to_int n in
52 let is_parameter (n : [< any_type ] Node.t) =
53 let n = Node.to_int n in
57 let symbol_tag (n : t_symbol) = (Node.to_int n) lsr 2
59 let get_tag g (n : t_symbol) = to_string g (symbol_tag n)
63 external parameter : [< any_type ] Node.t -> p_symbol = "%identity"
64 external terminal : [< any_type ] Node.t -> t_symbol = "%identity"
65 external non_terminal : [< any_type ] Node.t -> n_symbol = "%identity"
67 external get_id1 : t -> n_symbol -> tn_symbol = "caml_grammar_get_id1"
68 external get_id2 : t -> n_symbol -> tn_symbol = "caml_grammar_get_id2"
69 external get_param_pos : t -> n_symbol -> int = "caml_grammar_get_param_pos"
72 let num_params (n : n_symbol) =
73 let n = Node.to_int n in
76 let num_children (n : [< t_type | n_type ] Node.t ) =
77 if is_non_terminal n then
78 num_params (non_terminal n)
83 external load : Unix.file_descr -> bool -> t = "caml_grammar_load"
86 let start_symbol = (Node.of_int 0) in
87 let dummy_leaf = Leaf (Node.nil) in
88 let rec start_loop idx =
89 TRACE("grammar", 2, __ "start_loop %a\n%!" Node.print idx);
90 if idx >= Node.null then begin
91 let symbol = get_symbol_at g start_symbol idx in
92 if is_terminal symbol then
93 let () = ();TRACE("grammar", 2, __ "Symbol %a is terminal\n%!" Node.print symbol); in
94 let ts = terminal symbol in
95 if is_nil g ts then (TRACE("grammar", 2, __ "Symbol %a is nil\n%!" Node.print symbol)) else
96 (* let str = get_tag g ts in
97 Printf.printf "<%s>%!" str; *)
98 let fs = first_child g start_symbol idx in
100 start_loop (next_sibling g start_symbol fs);
101 (* Printf.printf "</%s>%!" str; *)
103 let tn = non_terminal symbol in
104 let nparam = num_params tn in
105 let child = ref (first_child g start_symbol idx) in
106 let a_param = Array.init nparam
107 (fun _ -> let c = !child in
108 child := next_sibling g start_symbol c;
114 and rule_loop (t : n_symbol) a_param =
115 TRACE("grammar", 2, __ "rule_loop %a, (%i) \n%!" Node.print t (Array.length a_param));
116 let id1 = get_id1 g t in
117 let id2 = get_id2 g t in
118 let param_pos = get_param_pos g t in
119 let nparam1 = num_children id1 in
120 let nparam2 = if is_terminal id2 && is_nil g (terminal id2) then 0 else num_children id2 in
121 let a_param1 = Array.create nparam1 dummy_leaf in
122 let a_param2 = Array.create nparam2 dummy_leaf in
123 let i = param_pos - 2 in
124 TRACE("grammar", 2, __ "id1: %i, id2: %i, param_pos: %i, nparam1: %i, nparam2: %i, i: %i\n%!"
125 (Node.to_int id1) (Node.to_int id2) param_pos nparam1 nparam2 i);
127 TRACE("grammar", 2, __ "blit a(%i) %i b(%i) %i %i\n%!"
128 (Array.length a_param) 0 (Array.length a_param1) 0 (i+1));
130 Array.blit a_param 0 a_param1 0 (i+1); (* Pass parameters before id2 *)
131 a_param1.(i+1) <- Node(id2, a_param2); (* id2( ... ) *)
133 TRACE("grammar", 2, __ "blit a(%i) %i b(%i) %i %i\n%!"
134 (Array.length a_param) (i + nparam2 + 1) (Array.length a_param1) (i+2) (nparam1 - i - 2));
135 Array.blit a_param (i + nparam2 + 1) a_param1 (i+2) (nparam1 - i - 2); (* Pass parameters after id2 *)
139 TRACE("grammar", 2, __ "blit a(%i) %i b(%i) %i %i\n\n\n%!"
140 (Array.length a_param) (i + 1) (Array.length a_param2) 0 (nparam2));
141 Array.blit a_param (i + 1) a_param2 0 nparam2; (* parameters below id2 *)
142 if is_non_terminal id1 then
143 let id1 = non_terminal id1 in
144 rule_loop id1 a_param1
146 let id1 = terminal id1 in
147 terminal_loop id1 a_param1
149 and terminal_loop (t : t_symbol) a_param =
150 if is_nil g t then () else begin
151 (* let str = get_tag g t in *)
152 (* Printf.printf "<%s>%!" str; *)
153 partial_loop a_param.(0);
154 partial_loop a_param.(1)
155 (* Printf.printf "</%s>%!" str *)
157 and partial_loop = function
158 | Leaf id -> start_loop id
159 | Node (id, a_param) ->
160 if is_terminal id then terminal_loop (terminal id) a_param
161 else rule_loop (non_terminal id) a_param
164 start_loop (Node.null)
169 let load filename bp =
170 let fd = Unix.openfile filename [ Unix.O_RDONLY ] 0o600 in
173 | e -> (Unix.close fd; raise e)
177 Tag.init (tag_operations g);