popl/asttopopl.ml

   1 (*
   2  * Copyright 2005-2009, Ecole des Mines de Nantes, University of Copenhagen
   3  * Yoann Padioleau, Julia Lawall, Rene Rydhof Hansen, Henrik Stuart, Gilles Muller, Nicolas Palix
   4  * This file is part of Coccinelle.
   5  *
   6  * Coccinelle is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, according to version 2 of the License.
   9  *
  10  * Coccinelle is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with Coccinelle.  If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  * The authors reserve the right to distribute this or future versions of
  19  * Coccinelle under other licenses.
  20  *)
  21
  22
  23 module Ast = Ast_cocci
  24 module Past = Ast_popl
  25
  26 (* --------------------------------------------------------------------- *)
  27
  28 let rec stm s =
  29   match Ast.unwrap s with
  30     Ast.Atomic(ast) ->
  31       (match Ast.unwrap ast with
  32         Ast.ExprStatement(_,_) -> Past.Term ast
  33       | Ast.Exp(_) -> Past.Term ast
  34       | Ast.Decl(_,_,_) -> Past.Term ast
  35       | _ -> failwith "complex statements not supported")
  36   | Ast.Disj(stm1::stm2::stmts) ->
  37       List.fold_left
  38         (function prev ->
  39           function cur ->
  40             Past.Or(Past.Seq(prev,Past.Empty),stm_list cur))
  41         (Past.Or(stm_list stm1,stm_list stm2)) stmts
  42   | Ast.Dots(dots,whencodes,_,_) ->
  43       (match whencodes with
  44         [Ast.WhenNot(a)] -> Past.DInfo(Past.When(Past.Dots,stm_list a),[],[])
  45       | _ -> failwith "only one when != supported")
  46   | Ast.Nest(stmt_dots,whencodes,false,_,_) ->
  47       let nest = Past.Nest(stm_list stmt_dots) in
  48       (match whencodes with
  49         [Ast.WhenNot(a)] -> Past.DInfo(Past.When(nest,stm_list a),[],[])
  50       | _ -> failwith "only when != supported")
  51   | Ast.While(header,body,(_,_,_,aft)) | Ast.For(header,body,(_,_,_,aft)) ->
  52       (* only allowed if only the header is significant *)
  53       (match (Ast.unwrap body,aft) with
  54         (Ast.Atomic(re),Ast.CONTEXT(_,Ast.NOTHING)) ->
  55           (match Ast.unwrap re with
  56             Ast.MetaStmt(_,Type_cocci.Unitary,_,false) -> Past.Term header
  57           | _ -> failwith "unsupported statement1")
  58       | _ -> failwith "unsupported statement2")
  59   | _ ->
  60       Pretty_print_cocci.statement "" s;
  61       failwith "unsupported statement3"
  62
  63 and stm_list s =
  64   match Ast.unwrap s with
  65     Ast.DOTS(d) ->
  66       List.fold_right
  67         (function cur -> function rest -> Past.Seq(stm cur, rest))
  68         d Past.Empty
  69   | _ -> failwith "only DOTS handled"
  70
  71 let top s =
  72   match Ast.unwrap s with
  73     Ast.CODE(stmt_dots) -> stm_list stmt_dots
  74   | _ -> failwith "only CODE handled"