X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Finterface%2FcicCache.ml;fp=helm%2Finterface%2FcicCache.ml;h=1b8488a40415f7fdfb26e8739fcee8c82497447d;hb=c01d2aaea05f7385bee46addd900cd0397756389;hp=0000000000000000000000000000000000000000;hpb=38e1ee1df7be76922343935255e26673af8c7682;p=helm.git diff --git a/helm/interface/cicCache.ml b/helm/interface/cicCache.ml new file mode 100644 index 000000000..1b8488a40 --- /dev/null +++ b/helm/interface/cicCache.ml @@ -0,0 +1,187 @@ +(******************************************************************************) +(* *) +(* PROJECT HELM *) +(* *) +(* Claudio Sacerdoti Coen *) +(* 24/01/2000 *) +(* *) +(* This module implements a trival cache system (an hash-table) for cic *) +(* objects. Uses the getter (getter.ml) and the parser (cicParser.ml) *) +(* *) +(******************************************************************************) + +let raise e = print_endline "***" ; flush stdout ; print_endline (Printexc.to_string e) ; flush stdout ; raise e;; + +(*CSC: forse i due seguenti tipi sono da unificare? *) +type cooked_obj = + Cooked of Cic.obj + | Frozen of Cic.obj + | Unchecked of Cic.obj +type type_checked_obj = + CheckedObj of Cic.obj (* cooked obj *) + | UncheckedObj of Cic.obj (* uncooked obj *) +;; + +exception NoFunctionProvided;; + +(* CSC: da sostituire con un (...) option ref *) +let cook_obj = ref (fun obj uri -> raise NoFunctionProvided);; + +exception CircularDependency of string;; +exception CouldNotUnfreeze of string;; +exception Impossible;; +exception UncookedObj;; + +module HashedType = + struct + type t = UriManager.uri * int (* uri, livello di cottura *) + let equal (u1,n1) (u2,n2) = UriManager.eq u1 u2 && n1 = n2 + let hash = Hashtbl.hash + end +;; + +(* Hashtable that uses == instead of = for testing equality *) +module HashTable = Hashtbl.Make(HashedType);; + +let hashtable = HashTable.create 271;; + +(* n is the number of time that the object must be cooked *) +let get_obj_and_type_checking_info uri n = + try + HashTable.find hashtable (uri,n) + with + Not_found -> + try + match HashTable.find hashtable (uri,0) with + Cooked _ + | Frozen _ -> raise Impossible + | Unchecked _ as t -> t + with + Not_found -> + let filename = Getter.get uri in + let (annobj,_) = CicParser.term_of_xml filename uri false in + let obj = Deannotate.deannotate_obj annobj in + let output = Unchecked obj in + HashTable.add hashtable (uri,0) output ; + output +;; + +(* DANGEROUS!!! *) +(* USEFUL ONLY DURING THE FIXING OF THE FILES *) +(* change_obj uri (Some newobj) *) +(* maps uri to newobj in cache. *) +(* change_obj uri None *) +(* maps uri to a freeze dummy-object. *) +let change_obj uri newobj = + let newobj = + match newobj with + Some newobj' -> Unchecked newobj' + | None -> Frozen (Cic.Variable ("frozen-dummy", Cic.Implicit)) + in + HashTable.remove hashtable (uri,0) ; + HashTable.add hashtable (uri,0) newobj +;; + +let is_annotation_uri uri = + Str.string_match (Str.regexp ".*\.ann$") (UriManager.string_of_uri uri) 0 +;; + +(* returns both the annotated and deannotated uncooked forms (plus the *) +(* map from ids to annotation targets) *) +let get_annobj_and_type_checking_info uri = + let filename = Getter.get uri in + match CicParser.term_of_xml filename uri true with + (_, None) -> raise Impossible + | (annobj, Some ids_to_targets) -> + (* If uri is the uri of an annotation, let's use the annotation file *) + if is_annotation_uri uri then + AnnotationParser.annotate (Getter.get_ann uri) ids_to_targets ; + try + (annobj, ids_to_targets, HashTable.find hashtable (uri,0)) + with + Not_found -> + let obj = Deannotate.deannotate_obj annobj in + let output = Unchecked obj in + HashTable.add hashtable (uri,0) output ; + (annobj, ids_to_targets, output) +;; + + +(* get_obj uri *) +(* returns the cic object whose uri is uri. If the term is not just in cache, *) +(* then it is parsed via CicParser.term_of_xml from the file whose name is *) +(* the result of Getter.get uri *) +let get_obj uri = + match get_obj_and_type_checking_info uri 0 with + Unchecked obj -> obj + | Frozen obj -> obj + | Cooked obj -> obj +;; + +(* get_annobj uri *) +(* returns the cic object whose uri is uri either in annotated and *) +(* deannotated form. The term is put into the cache if it's not there yet. *) +let get_annobj uri = + let (ann, ids_to_targets, deann) = get_annobj_and_type_checking_info uri in + let deannobj = + match deann with + Unchecked obj -> obj + | Frozen _ -> raise (CircularDependency (UriManager.string_of_uri uri)) + | Cooked obj -> obj + in + (ann, ids_to_targets, deannobj) +;; + +(*CSC Commento falso *) +(* get_obj uri *) +(* returns the cooked cic object whose uri is uri. The term must be present *) +(* and cooked in cache *) +let rec get_cooked_obj uri cookingsno = + match get_obj_and_type_checking_info uri cookingsno with + Unchecked _ + | Frozen _ -> raise UncookedObj + | Cooked obj -> obj +;; + +(* is_type_checked uri *) +(* CSC: commento falso ed obsoleto *) +(* returns true if the term has been type-checked *) +(* otherwise it returns false and freeze the term for type-checking *) +(* set_type_checking_info must be called to unfreeze the term *) +let is_type_checked uri cookingsno = + match get_obj_and_type_checking_info uri cookingsno with + Cooked obj -> CheckedObj obj + | Unchecked obj -> + HashTable.remove hashtable (uri,0) ; + HashTable.add hashtable (uri,0) (Frozen obj) ; + UncheckedObj obj + | Frozen _ -> raise (CircularDependency (UriManager.string_of_uri uri)) +;; + +(* set_type_checking_info uri *) +(* must be called once the type-checking of uri is finished *) +(* The object whose uri is uri is unfreezed *) +let set_type_checking_info uri = + match HashTable.find hashtable (uri,0) with + Frozen obj -> + (* let's cook the object at every level *) + HashTable.remove hashtable (uri,0) ; + let obj' = CicSubstitution.undebrujin_inductive_def uri obj in + HashTable.add hashtable (uri,0) (Cooked obj') ; + let cooked_objs = !cook_obj obj' uri in + let last_cooked_level = ref 0 in + let last_cooked_obj = ref obj' in + List.iter + (fun (n,cobj) -> + for i = !last_cooked_level + 1 to n do + HashTable.add hashtable (uri,i) (Cooked !last_cooked_obj) + done ; + HashTable.add hashtable (uri,n + 1) (Cooked cobj) ; + last_cooked_level := n + 1 ; + last_cooked_obj := cobj + ) cooked_objs ; + for i = !last_cooked_level + 1 to UriManager.depth_of_uri uri + 1 do + HashTable.add hashtable (uri,i) (Cooked !last_cooked_obj) + done + | _ -> raise (CouldNotUnfreeze (UriManager.string_of_uri uri)) +;;