X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fhbugs%2Fcommon%2Fhbugs_messages.ml;h=b7e6f5ddc59a5cd7bdbed32c0d91df5fbe668b17;hb=1c7fb836e2af4f2f3d18afd0396701f2094265ff;hp=0cc0f1b1fe599d079c21f79248a7253ebe361e10;hpb=cc963878cd6a37db5958d0ec3aaa74c88d71b6fd;p=helm.git
diff --git a/helm/hbugs/common/hbugs_messages.ml b/helm/hbugs/common/hbugs_messages.ml
index 0cc0f1b1f..b7e6f5ddc 100644
--- a/helm/hbugs/common/hbugs_messages.ml
+++ b/helm/hbugs/common/hbugs_messages.ml
@@ -36,6 +36,7 @@ open Pxp_yacc;;
let debug = true;;
exception Attribute_not_found of string;;
+exception Empty_node;; (** found a node with no _element_ children *)
exception No_element_found of string;;
exception Parse_error of string * string;; (* parsing subject, reason *)
exception Unexpected_message of message;;
@@ -47,17 +48,18 @@ let get_attr node name =
| Value s -> s
| _ -> raise Not_found)
with Not_found -> raise (Attribute_not_found name)
+let assert_element n name =
+ match n#node_type with
+ | T_element n when n = name ->
+ ()
+ | _ -> raise (Parse_error ("", "Expected node: " ^ name))
(** given a string representation of a proof asistant state (e.g. the first
child of the XML root of a State_change or Start_musing message), build from
it an HBugs view of a proof assistant state *)
let parse_state (root: ('a node extension as 'a) node) =
- let assert_element n name =
- match n#node_type with
- | T_element n when n = name ->
- ()
- | _ -> raise (Parse_error ("", "Expected node: " ^ name))
- in
+ if (List.filter is_xml_element root#sub_nodes) = [] then
+ raise Empty_node;
let buf = Buffer.create 10240 in
let node_to_string (node: ('a node extension as 'a) node) =
Buffer.clear buf;
@@ -69,15 +71,14 @@ let parse_state (root: ('a node extension as 'a) node) =
let (goal_node, type_node, body_node) =
try
(find_element "CurrentGoal" root,
- find_element "ConstantType" root, (* TODO e' sempre ConstantType? *)
+ find_element "ConstantType" root,
find_element "CurrentProof" root)
with Not_found ->
raise (Parse_error ("", "Malformed HBugs status XML document"))
in
assert_element root "gTopLevelStatus";
assert_element goal_node "CurrentGoal";
- assert_element type_node "ConstantType"; (* TODO: tutti gli xml 'type' hanno
- come root element "ConstantType"? *)
+ assert_element type_node "ConstantType";
assert_element body_node "CurrentProof";
goal_node#write (`Out_buffer buf) `Enc_utf8;
let (type_string, body_string) =
@@ -148,10 +149,14 @@ let msg_of_string' s =
| T_element "state_change" ->
let state_node =
try
- find_element ~deeply:false "gTopLevelStatus" root
- with Not_found -> raise (No_element_found "gTopLevelStatus")
+ Some (find_element ~deeply:false "gTopLevelStatus" root)
+ with Not_found -> None
in
- State_change (get_attr root "id", parse_state state_node)
+ State_change
+ (get_attr root "id",
+ match state_node with
+ | Some n -> (try Some (parse_state n) with Empty_node -> None)
+ | None -> None)
| T_element "wow" -> Wow (get_attr root "id")
(* tutor -> broker *)
@@ -211,6 +216,8 @@ let msg_of_string' s =
| T_element "abort_musing" ->
Abort_musing (get_attr root "id", get_attr root "musing_id")
| T_element "thanks" -> Thanks (get_attr root "id", get_attr root "musing_id")
+ | T_element "too_late" ->
+ Too_late (get_attr root "id", get_attr root "musing_id")
| _ -> raise (No_element_found s)
@@ -219,18 +226,17 @@ let msg_of_string s =
msg_of_string' s
with e -> raise (Parse_error (s, Printexc.to_string e))
-let pp_state (type_string, body_string, goal) =
- (* ASSUMPTION: type_string and body_string are well formed XML document
- contents (i.e. they don't contain heading declaration nor DOCTYPE
- one *)
- let res =
+let pp_state = function
+ | Some (type_string, body_string, goal) ->
+ (* ASSUMPTION: type_string and body_string are well formed XML document
+ contents (i.e. they don't contain heading declaration nor
+ DOCTYPE one *)
"\n" ^
(sprintf "%d\n" goal) ^
type_string ^ "\n" ^
body_string ^ "\n" ^
"\n"
- in
- res
+ | None -> "\n"
let rec pp_hint = function
| Use_ring_Luke -> sprintf ""
@@ -315,7 +321,8 @@ let string_of_msg = function
| Tutor_registered id -> sprintf "" id
| Tutor_unregistered id -> sprintf "" id
| Start_musing (id, state) ->
- sprintf "%s" id (pp_state state)
+ sprintf "%s"
+ id (pp_state (Some state))
| Abort_musing (id, musing_id) ->
sprintf "" id musing_id
| Thanks (id, musing_id) ->