branch for universe

[helm.git] / components / grafite_parser / dependenciesParser.ml

diff --git a/components/grafite_parser/dependenciesParser.ml b/components/grafite_parser/dependenciesParser.ml
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+(* Copyright (C) 2005, HELM Team.
+ * 
+ * This file is part of HELM, an Hypertextual, Electronic
+ * Library of Mathematics, developed at the Computer Science
+ * Department, University of Bologna, Italy.
+ * 
+ * HELM is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * 
+ * HELM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with HELM; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA  02111-1307, USA.
+ * 
+ * For details, see the HELM World-Wide-Web page,
+ * http://helm.cs.unibo.it/
+ *)
+
+(* $Id$ *)
+
+exception UnableToInclude of string
+
+  (* statements meaningful for matitadep *)
+type dependency =
+  | IncludeDep of string
+  | UriDep of UriManager.uri
+  
+let pp_dependency = function
+  | IncludeDep str -> "include \"" ^ str ^ "\""
+  | UriDep uri -> "uri \"" ^ UriManager.string_of_uri uri ^ "\""
+
+let parse_dependencies lexbuf = 
+  let tok_stream,_ =
+    CicNotationLexer.level2_ast_lexer.Token.tok_func (Obj.magic lexbuf)
+  in
+  let rec parse acc = 
+   let continue, acc =
+     try
+      (parser
+      | [< '("QSTRING", s) >] ->
+          (* because of alias id qstring = qstring :-( *)
+          (try
+            true, (UriDep (UriManager.uri_of_string s) :: acc)
+           with
+            UriManager.IllFormedUri _ -> true, acc)
+      | [< '("URI", u) >] ->
+          true, (UriDep (UriManager.uri_of_string u) :: acc)
+      | [< '("IDENT", "include"); '("QSTRING", fname) >] ->
+          true, (IncludeDep fname :: acc)
+      | [< '("IDENT", "include'"); '("QSTRING", fname) >] ->
+          true, (IncludeDep fname :: acc)
+      | [< '("EOI", _) >] -> false, acc
+      | [< 'tok >] -> true, acc
+      | [<  >] -> false, acc) tok_stream
+     with
+        Stream.Error _ -> false, acc
+      | CicNotationLexer.Error _ -> true, acc
+   in
+    if continue then parse acc else acc
+  in
+  List.rev (parse [])
+
+let deps_of_file ma_file =
+ try
+   let ic = open_in ma_file in
+   let istream = Ulexing.from_utf8_channel ic in
+   let dependencies = parse_dependencies istream in
+   close_in ic;
+   dependencies
+ with End_of_file -> []
+;;