~npalix/coccinelle/upstream

(*

 * This file is part of Coccinelle, licensed under the terms of the GPL v2.

 * See copyright.txt in the Coccinelle source code for more information.

 * The Coccinelle source code can be obtained at http://coccinelle.lip6.fr

 *)

module Ast = Ast_cocci

module Past = Ast_popl

(* --------------------------------------------------------------------- *)

let rec stm s =

  match Ast.unwrap s with

    Ast.Atomic(ast) ->

      (match Ast.unwrap ast with

	Ast.ExprStatement(_,_) -> Past.Term ast

      |	Ast.Exp(_) -> Past.Term ast

      |	Ast.Decl(_,_,_) -> Past.Term ast

      |	_ -> failwith "complex statements not supported")

  | Ast.Disj(stm1::stm2::stmts) ->

      List.fold_left

	(function prev ->

	  function cur ->

	    Past.Or(Past.Seq(prev,Past.Empty),stm_list cur))

	(Past.Or(stm_list stm1,stm_list stm2)) stmts

  | Ast.Dots(dots,whencodes,_,_) ->

      (match whencodes with

	[Ast.WhenNot(a)] -> Past.DInfo(Past.When(Past.Dots,stm_list a),[],[])

      |	_ -> failwith "only one when != supported")

  | Ast.Nest(stmt_dots,whencodes,false,_,_) ->

      let nest = Past.Nest(stm_list stmt_dots) in

      (match whencodes with

	[Ast.WhenNot(a)] -> Past.DInfo(Past.When(nest,stm_list a),[],[])

      |	_ -> failwith "only when != supported")

  | Ast.While(header,body,(_,_,_,aft)) | Ast.For(header,body,(_,_,_,aft)) ->

      (* only allowed if only the header is significant *)

      (match (Ast.unwrap body,aft) with

	(Ast.Atomic(re),Ast.CONTEXT(_,Ast.NOTHING)) ->

	  (match Ast.unwrap re with

	    Ast.MetaStmt(_,Type_cocci.Unitary,_,false) -> Past.Term header

	  | _ -> failwith "unsupported statement1")

      | _ -> failwith "unsupported statement2")

  | _ ->

      Pretty_print_cocci.statement "" s;

      failwith "unsupported statement3"

and stm_list s =

  List.fold_right

    (function cur -> function rest -> Past.Seq(stm cur, rest))

    (Ast.unwrap s) Past.Empty

let top s =

  match Ast.unwrap s with

    Ast.CODE(stmt_dots) -> stm_list stmt_dots

  | _ -> failwith "only CODE handled"