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(************************************************************************)
(*  v      *   The Coq Proof Assistant  /  The Coq Development Team     *)
(* <O___,, *   INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2013     *)
(*   \VV/  **************************************************************)
(*    //   *      This file is distributed under the terms of the       *)
(*         *       GNU Lesser General Public License Version 2.1        *)
(************************************************************************)

open Names
open Declarations
open Environ
open Mod_subst
open Modops
open Nativecode
open Nativelib

(** This file implements separate compilation for libraries in the native
compiler *)

let rec translate_mod prefix mp env mod_expr acc =
  match mod_expr with
  | SEBident mp' -> assert false
  | SEBstruct msb ->
      let env' = add_signature mp msb empty_delta_resolver env in
      List.fold_left (translate_field prefix mp env') acc msb
  | SEBfunctor (mbid,mtb,meb) -> acc
  | SEBapply (f,x,_) -> assert false
  | SEBwith _ -> assert false
and translate_field prefix mp env (code, upds as acc) (l,x) =
  match x with
  | SFBconst cb ->
      let con = make_con mp empty_dirpath l in
      compile_constant_field (pre_env env) prefix con acc cb
  | SFBmind mb ->
      compile_mind_field prefix mp l acc mb
  | SFBmodule md ->
      translate_mod prefix md.mod_mp env md.mod_type acc
  | SFBmodtype mdtyp ->
      translate_mod prefix mdtyp.typ_mp env mdtyp.typ_expr acc

let dump_library mp dp env mod_expr =
  if !Flags.debug then Pp.msg_debug (Pp.str "Compiling library...");
  match mod_expr with
  | SEBstruct msb ->
      let env = add_signature mp msb empty_delta_resolver env in
      let prefix = mod_uid_of_dirpath dp ^ "." in
      let t0 = Sys.time () in 
      clear_global_tbl ();
      clear_symb_tbl ();
      let mlcode, upds =
        List.fold_left (translate_field prefix mp env) ([],empty_updates) msb
      in
      let t1 = Sys.time () in
      let time_info = Format.sprintf "Time spent generating this code: %.5fs" (t1-.t0) in
      let mlcode = add_header_comment (List.rev mlcode) time_info in
      mlcode, get_symbols_tbl (), upds
  | _ -> assert false


let compile_library dir code load_path f =
  let header = mk_library_header dir in
  let ml_filename = f^".ml" in
  write_ml_code ml_filename ~header code;
  fst (call_compiler ml_filename load_path)