(*
 *
 * Copyright (c) 2001-2002, 
 *  George C. Necula    <necula@cs.berkeley.edu>
 *  Scott McPeak        <smcpeak@cs.berkeley.edu>
 *  Wes Weimer          <weimer@cs.berkeley.edu>
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * 1. Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *
 * 3. The names of the contributors may not be used to endorse or promote
 * products derived from this software without specific prior written
 * permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *)

(* libmaincil *)
(* this is a replacement for maincil.ml, for the case when we're
 * creating a C-callable library (libcil.a); all it does is register
 * a couple of functions and initialize CIL *)


module E = Errormsg

open Cil


(* print a Cil 'file' to stdout *)
let unparseToStdout (cil : file) : unit =
begin
  dumpFile defaultCilPrinter stdout cil
end;;

(* a visitor to unroll all types - may need to do some magic to keep attributes *)
class unrollVisitorClass = object (self)
  inherit nopCilVisitor

  (* variable declaration *)
  method vvdec (vi : varinfo) : varinfo visitAction = 
    begin
      vi.vtype <- unrollTypeDeep vi.vtype;
      (*ignore (E.log "varinfo for %s in file '%s' line %d byte %d\n" vi.vname vi.vdecl.file vi.vdecl.line vi.vdecl.byte);*)
      SkipChildren
    end
    
  (* global: need to unroll fields of compinfo *)
  method vglob (g : global) : global list visitAction =
    begin
      match g with
          GCompTag(ci, loc) as g ->
            let doFieldinfo (fi : fieldinfo) : unit = 
              fi.ftype <- unrollTypeDeep fi.ftype 
            in begin                
                ignore(List.map doFieldinfo ci.cfields);
                (*ChangeTo [g]*)
                SkipChildren
              end              
        | _ -> DoChildren
    end
end;;


let unrollVisitor = new unrollVisitorClass;;

(* open and parse a C file into a Cil 'file', unroll all typedefs *)
let parseOneFile (fname: string) : file =
  let ast : file = Frontc.parse fname () in
    begin
      visitCilFile unrollVisitor ast;
      ast
    end
;;

let getDummyTypes () : typ * typ =
  ( TPtr(TVoid [], []), TInt(IInt, []) )
;;

(* register some functions - these may be called from C code *)
Callback.register "cil_parse" parseOneFile;
Callback.register "cil_unparse" unparseToStdout;
(* Callback.register "unroll_type_deep" unrollTypeDeep; *)
Callback.register "get_dummy_types" getDummyTypes;

(* initalize CIL *)
initCIL ();