popl09/asttopopl.ml

   1 (*
   2  * Copyright 2012, INRIA
   3  * Julia Lawall, Gilles Muller
   4  * Copyright 2010-2011, INRIA, University of Copenhagen
   5  * Julia Lawall, Rene Rydhof Hansen, Gilles Muller, Nicolas Palix
   6  * Copyright 2005-2009, Ecole des Mines de Nantes, University of Copenhagen
   7  * Yoann Padioleau, Julia Lawall, Rene Rydhof Hansen, Henrik Stuart, Gilles Muller, Nicolas Palix
   8  * This file is part of Coccinelle.
   9  *
  10  * Coccinelle is free software: you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation, according to version 2 of the License.
  13  *
  14  * Coccinelle is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with Coccinelle.  If not, see <http://www.gnu.org/licenses/>.
  21  *
  22  * The authors reserve the right to distribute this or future versions of
  23  * Coccinelle under other licenses.
  24  *)
  25
  26
  27 module Ast = Ast_cocci
  28 module Past = Ast_popl
  29
  30 (* --------------------------------------------------------------------- *)
  31
  32 let term s inif =
  33   let fail _ =
  34     Pretty_print_cocci.statement "" s;
  35     Format.print_newline();
  36     failwith "complex statements not supported" in
  37   match Ast.unwrap s with
  38     Ast.Atomic(ast) ->
  39       (match Ast.unwrap ast with
  40         Ast.ExprStatement(_,_) -> Past.Atomic ast
  41       | Ast.Exp(_) -> Past.Atomic ast
  42       | Ast.Decl(_,_,_) -> Past.Atomic ast
  43       | Ast.ReturnExpr(_,_,_) -> Past.Atomic ast
  44       | Ast.MetaStmt(_,_,_,_) when inif -> Past.Atomic ast
  45       | Ast.DisjRuleElem(_) -> Past.Atomic ast
  46       | _ -> fail())
  47   | _ -> fail()
  48
  49 let rec stm s =
  50   match Ast.unwrap s with
  51     Ast.Atomic(ast) -> Past.Term(term s false,dots_bef_aft s false)
  52   | Ast.IfThen(header,body,aft) ->
  53       Past.Term(
  54       Past.IfThen(Past.Atomic header,term body true,aft),
  55       dots_bef_aft s true)
  56   | Ast.Disj(stm1::stm2::stmts) ->
  57       List.fold_left
  58         (function prev ->
  59           function cur ->
  60             Past.Or(Past.Seq(prev,Past.Empty),stm_list cur))
  61         (Past.Or(stm_list stm1,stm_list stm2)) stmts
  62   | Ast.Dots(dots,whencodes,_,_) ->
  63       Past.DInfo
  64         (List.fold_left
  65            (function prev ->
  66              function
  67                  Ast.WhenNot(a) -> Past.When(prev,stm_list a)
  68                | _ -> failwith "only when != supported")
  69            Past.Dots whencodes)
  70   | Ast.Nest(starter,stmt_dots,ender,whencodes,false,_,_) ->
  71       (match Ast.get_mcodekind starter with
  72         Ast.MINUS _ -> failwith "only context nests supported"
  73       | _ -> ());
  74       let nest = Past.Nest(stm_list stmt_dots) in
  75       Past.DInfo
  76         (List.fold_left
  77            (function prev ->
  78              function
  79                  Ast.WhenNot(a) -> Past.When(prev,stm_list a)
  80                | _ -> failwith "only when != supported")
  81            nest whencodes)
  82   | _ ->
  83       Pretty_print_cocci.statement "" s;
  84       failwith "unsupported statement3"
  85
  86 and dots_bef_aft s inif =
  87   match Ast.get_dots_bef_aft s with
  88     Ast.AddingBetweenDots (brace_term,n) ->
  89       Past.AddingBetweenDots (term brace_term inif,n)
  90   | Ast.DroppingBetweenDots (brace_term,n) ->
  91       Past.DroppingBetweenDots (term brace_term inif,n)
  92   | Ast.NoDots -> Past.NoDots
  93
  94 and stm_list s =
  95   match Ast.unwrap s with
  96     Ast.DOTS(d) ->
  97       List.fold_right
  98         (function cur -> function rest -> Past.Seq(stm cur, rest))
  99         d Past.Empty
 100   | _ -> failwith "only DOTS handled"
 101
 102 let top s =
 103   match Ast.unwrap s with
 104     Ast.CODE(stmt_dots) -> stm_list stmt_dots
 105   | _ -> failwith "only CODE handled"