1 (* Copyright (C) 2000, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
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15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with HELM; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://cs.unibo.it/helm/.
26 (******************************************************************************)
30 (* Claudio Sacerdoti Coen <sacerdot@@cs.unibo.it> *)
33 (* This module is the objects level of a parser for cic objects from xml *)
34 (* files to the internal representation. It uses the module cicParser3 *)
35 (* cicParser3 (terms level) and it is used only through cicParser2 (top *)
38 (******************************************************************************)
40 exception IllFormedXml of int;;
41 exception NotImplemented;;
43 (* Utility functions that transform a Pxp attribute into something useful *)
45 (* mk_absolute_uris "n1: v1 ... vn n2 : u1 ... un ...." *)
46 (* returns [(n1,[absolute_uri_for_v1 ; ... ; absolute_uri_for_vn]) ; (n2,...) *)
47 let mk_absolute_uris s =
48 let l = (Str.split (Str.regexp ":") s) in
49 let absolute_of_relative n v =
50 let module P3 = CicParser3 in
54 | (n,he::tl) when n > 0 ->
55 "/" ^ he ^ mkburi (n - 1, tl)
56 | _ -> raise (IllFormedXml 12)
58 let m = List.length !P3.current_sp - (int_of_string n) in
59 let buri = mkburi (m, !P3.current_sp) in
60 UriManager.uri_of_string ("cic:" ^ buri ^ v ^ ".var")
66 let vars = (Str.split (Str.regexp " ") vs) in
67 [(int_of_string no, List.map (absolute_of_relative no) vars)]
69 let vars = (Str.split (Str.regexp " ") vs) in
74 let (pvars, no2) = add_prefix tl in
75 ((absolute_of_relative no he)::pvars, no2)
76 | _ -> raise (IllFormedXml 11)
78 let (pvars, no2) = add_prefix vars in
79 (int_of_string no, pvars)::(absolutize (no2::tl))
80 | _ -> raise (IllFormedXml 10)
82 (* last parameter must be applied first *)
86 let option_uri_list_of_attr a1 a2 =
87 let module T = Pxp_types in
90 T.Value s -> mk_absolute_uris s
91 | _ -> raise (IllFormedXml 0)
94 T.Value "POSSIBLE" -> Cic.Possible parameters
95 | T.Implied_value -> Cic.Actual parameters
96 | _ -> raise (IllFormedXml 0)
99 let uri_list_of_attr a =
100 let module T = Pxp_types in
102 T.Value s -> mk_absolute_uris s
103 | _ -> raise (IllFormedXml 0)
106 let string_of_attr a =
107 let module T = Pxp_types in
110 | _ -> raise (IllFormedXml 0)
114 int_of_string (string_of_attr a)
118 bool_of_string (string_of_attr a)
121 (* Other utility functions *)
124 match n#sub_nodes with
126 | _ -> raise (IllFormedXml 1)
129 (* Functions that, given the list of sons of a node of the cic dom (objects *)
130 (* level), retrieve the internal representation associated to the node. *)
131 (* Everytime a cic term subtree is found, it is translated to the internal *)
132 (* representation using the method to_cic_term defined in cicParser3. *)
133 (* Each function raise IllFormedXml if something goes wrong, but this should *)
134 (* be impossible due to the presence of the dtd *)
135 (* The functions should really be obvious looking at their name and the cic *)
138 (* called when a CurrentProof is found *)
139 let get_conjs_value_type l =
140 let rec rget (c, v, t) l =
141 let module D = Pxp_document in
144 | conj::tl when conj#node_type = D.T_element "Conjecture" ->
145 let no = int_of_attr (conj#attribute "no")
146 and typ = (get_content conj)#extension#to_cic_term in
147 rget ((no, typ)::c, v, t) tl
148 | value::tl when value#node_type = D.T_element "body" ->
149 let v' = (get_content value)#extension#to_cic_term in
151 None -> rget (c, Some v', t) tl
152 | _ -> raise (IllFormedXml 2)
154 | typ::tl when typ#node_type = D.T_element "type" ->
155 let t' = (get_content typ)#extension#to_cic_term in
157 None -> rget (c, v, Some t') tl
158 | _ -> raise (IllFormedXml 3)
160 | _ -> raise (IllFormedXml 4)
162 match rget ([], None, None) l with
163 (c, Some v, Some t) -> (c, v, t)
164 | _ -> raise (IllFormedXml 5)
167 (* used only by get_inductive_types; called one time for each inductive *)
168 (* definitions in a block of inductive definitions *)
169 let get_names_arity_constructors l =
170 let rec rget (a,c) l =
171 let module D = Pxp_document in
174 | arity::tl when arity#node_type = D.T_element "arity" ->
175 let a' = (get_content arity)#extension#to_cic_term in
177 | con::tl when con#node_type = D.T_element "Constructor" ->
178 let id = string_of_attr (con#attribute "name")
179 and ty = (get_content con)#extension#to_cic_term in
180 rget (a,(id,ty,ref None)::c) tl
181 | _ -> raise (IllFormedXml 9)
183 match rget (None,[]) l with
184 (Some a, c) -> (a, List.rev c)
185 | _ -> raise (IllFormedXml 8)
188 (* called when an InductiveDefinition is found *)
189 let rec get_inductive_types =
193 let tyname = string_of_attr (he#attribute "name")
194 and inductive = bool_of_attr (he#attribute "inductive")
196 get_names_arity_constructors (he#sub_nodes)
198 (tyname,inductive,arity,cons)::(get_inductive_types tl) (*CSC 0 a caso *)
201 (* This is the main function and also the only one used directly from *)
202 (* cicParser. Given the root of the dom tree, it returns the internal *)
203 (* representation of the cic object described in the tree *)
204 (* It uses the previous functions and the to_cic_term method defined *)
205 (* in cicParser3 (used for subtrees that encode cic terms) *)
207 let module D = Pxp_document in
208 let module C = Cic in
209 let ntype = n # node_type in
211 D.T_element "Definition" ->
212 let id = string_of_attr (n # attribute "name")
214 option_uri_list_of_attr (n#attribute "params") (n#attribute "paramMode")
216 let sons = n#sub_nodes in
219 v#node_type = D.T_element "body" &&
220 t#node_type = D.T_element "type" ->
221 let v' = get_content v
222 and t' = get_content t in
223 (v'#extension#to_cic_term, t'#extension#to_cic_term)
224 | _ -> raise (IllFormedXml 6)
225 and xid = string_of_attr (n#attribute "id") in
226 C.ADefinition (xid, id, value, typ, params)
227 | D.T_element "Axiom" ->
228 let id = string_of_attr (n # attribute "name")
229 and params = uri_list_of_attr (n # attribute "params")
231 (get_content (get_content n))#extension#to_cic_term
232 and xid = string_of_attr (n#attribute "id") in
233 C.AAxiom (xid, id, typ, params)
234 | D.T_element "CurrentProof" ->
235 let name = string_of_attr (n#attribute "name")
236 and xid = string_of_attr (n#attribute "id") in
237 let sons = n#sub_nodes in
238 let (conjs, value, typ) = get_conjs_value_type sons in
239 C.ACurrentProof (xid, name, conjs, value, typ)
240 | D.T_element "InductiveDefinition" ->
241 let sons = n#sub_nodes
242 and xid = string_of_attr (n#attribute "id") in
243 let inductiveTypes = get_inductive_types sons
244 and params = uri_list_of_attr (n#attribute "params")
245 and nparams = int_of_attr (n#attribute "noParams") in
246 C.AInductiveDefinition (xid, inductiveTypes, params, nparams)
247 | D.T_element "Variable" ->
248 let name = string_of_attr (n#attribute "name")
249 and xid = string_of_attr (n#attribute "id")
251 let sons = n#sub_nodes in
254 b#node_type = D.T_element "body" &&
255 t#node_type = D.T_element "type" ->
256 let b' = get_content b
257 and t' = get_content t in
258 (Some (b'#extension#to_cic_term), t'#extension#to_cic_term)
259 | [t] when t#node_type = D.T_element "type" ->
260 let t' = get_content t in
261 (None, t'#extension#to_cic_term)
262 | _ -> raise (IllFormedXml 6)
264 C.AVariable (xid,name,body,typ)
268 raise (IllFormedXml 7)