(* wrappi
 * Copyright (C) 2011 Red Hat Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 *)

open Unix
open Printf

open Wrappi_pr

let copyright_years =
  let this_year = 1900 + (localtime (time ())).tm_year in
  if this_year > 2011 then sprintf "2011-%04d" this_year else "2011"

(* Generate a header block in a number of standard styles. *)
type comment_style =
  | CStyle | CPlusPlusStyle | HashStyle | OCamlStyle | HaskellStyle
  | ErlangStyle
type license = GPLv2plus | LGPLv2plus

let generate_header inputs comment license =
  let c = match comment with
    | CStyle ->         pr "/* "; " *"
    | CPlusPlusStyle -> pr "// "; "//"
    | HashStyle ->      pr "# ";  "#"
    | OCamlStyle ->     pr "(* "; " *"
    | HaskellStyle ->   pr "{- "; "  "
    | ErlangStyle ->    pr "%% "; "% " in
  pr "wrappi generated file\n";
  pr "%s WARNING: THIS FILE IS GENERATED FROM:\n" c;
  List.iter (pr "%s   %s\n" c) inputs;
  pr "%s ANY CHANGES YOU MAKE TO THIS FILE WILL BE LOST.\n" c;
  pr "%s\n" c;
  pr "%s Copyright (C) %s Red Hat Inc.\n" c copyright_years;
  pr "%s\n" c;
  (match license with
   | GPLv2plus ->
       pr "%s This program is free software; you can redistribute it and/or modify\n" c;
       pr "%s it under the terms of the GNU General Public License as published by\n" c;
       pr "%s the Free Software Foundation; either version 2 of the License, or\n" c;
       pr "%s (at your option) any later version.\n" c;
       pr "%s\n" c;
       pr "%s This program is distributed in the hope that it will be useful,\n" c;
       pr "%s but WITHOUT ANY WARRANTY; without even the implied warranty of\n" c;
       pr "%s MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n" c;
       pr "%s GNU General Public License for more details.\n" c;
       pr "%s\n" c;
       pr "%s You should have received a copy of the GNU General Public License along\n" c;
       pr "%s with this program; if not, write to the Free Software Foundation, Inc.,\n" c;
       pr "%s 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.\n" c;

   | LGPLv2plus ->
       pr "%s This library is free software; you can redistribute it and/or\n" c;
       pr "%s modify it under the terms of the GNU Lesser General Public\n" c;
       pr "%s License as published by the Free Software Foundation; either\n" c;
       pr "%s version 2 of the License, or (at your option) any later version.\n" c;
       pr "%s\n" c;
       pr "%s This library is distributed in the hope that it will be useful,\n" c;
       pr "%s but WITHOUT ANY WARRANTY; without even the implied warranty of\n" c;
       pr "%s MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU\n" c;
       pr "%s Lesser General Public License for more details.\n" c;
       pr "%s\n" c;
       pr "%s You should have received a copy of the GNU Lesser General Public\n" c;
       pr "%s License along with this library; if not, write to the Free Software\n" c;
       pr "%s Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\n" c;
  );
  (match comment with
   | CStyle -> pr " */\n"
   | CPlusPlusStyle
   | ErlangStyle
   | HashStyle -> ()
   | OCamlStyle -> pr " *)\n"
   | HaskellStyle -> pr "-}\n"
  );
  pr "\n"