--- /dev/null
+(* wrappi
+ * Copyright (C) 2011-2012 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.
+ *)
+
+(* For general information about camlp4, see:
+ * http://brion.inria.fr/gallium/index.php/Camlp4
+ *
+ * For information about quotations, see:
+ * http://brion.inria.fr/gallium/index.php/Quotation
+ *)
+
+open Camlp4.PreCast
+open Syntax
+open Ast
+
+open Wrappi_types
+
+(* Convert a plain list into a list AST. *)
+let rec expr_of_list _loc = function
+ | [] -> <:expr< [] >>
+ | h::t -> let t = expr_of_list _loc t in <:expr< $h$ :: $t$ >>
+
+(* Convert an optional type into an option AST. *)
+let expr_of_option _loc = function
+ | None -> <:expr< None >>
+ | Some x -> <:expr< Some $x$ >>
+
+(* Convert a _loc to an AST. *)
+let expr_of_loc _loc loc =
+ let file_name,
+ start_line, start_bol, start_off,
+ stop_line, stop_bol, stop_off,
+ ghost = Loc.to_tuple loc in
+ <:expr< Camlp4.PreCast.Loc.of_tuple
+ ($str:file_name$,
+ $`int:start_line$, $`int:start_bol$, $`int:start_off$,
+ $`int:stop_line$, $`int:stop_bol$, $`int:stop_off$,
+ $`bool:ghost$) >>
+
+let add_entry_point _loc local name parameters rtype code includes =
+ let loc = expr_of_loc _loc _loc in
+
+ let local =
+ match local with None -> <:expr< false >> | _ -> <:expr< true >> in
+
+ let parameters = List.map (
+ fun (name, t) -> <:expr< ($str:name$, $t$, None) >>
+ ) parameters in
+ let parameters = expr_of_list _loc parameters in
+
+ let code = expr_of_option _loc code in
+
+ let includes = match includes with None -> <:expr< [] >> | Some xs -> xs in
+
+ <:str_item<
+ let ep = { Wrappi_types.ep_loc = $loc$;
+ ep_local = $local$;
+ ep_name = $str:name$;
+ ep_ftype = ($rtype$, $parameters$, []);
+ ep_code = $code$;
+ ep_includes = $includes$ } in
+ Wrappi_accumulator.add_entry_point ep
+ >>
+
+let add_typedef _loc name t =
+ let loc = expr_of_loc _loc _loc in
+
+ <:str_item<
+ let td = { Wrappi_types.td_loc = $loc$;
+ td_name = $str:name$;
+ td_type = $t$ } in
+ Wrappi_accumulator.add_typedef td
+ >>
+
+let add_enum _loc name identifiers =
+ let loc = expr_of_loc _loc _loc in
+
+ <:str_item<
+ let en = { Wrappi_types.en_loc = $loc$;
+ en_name = $str:name$;
+ en_identifiers = Array.of_list $identifiers$ } in
+ Wrappi_accumulator.add_enum en
+ >>
+
+let add_struct _loc name fields =
+ let loc = expr_of_loc _loc _loc in
+
+ let fields = List.map (
+ fun (name, t) -> <:expr< ($str:name$, $t$) >>
+ ) fields in
+ let fields = expr_of_list _loc fields in
+
+ <:str_item<
+ let sd = { Wrappi_types.sd_loc = $loc$;
+ sd_name = $str:name$;
+ sd_fields = Array.of_list $fields$ } in
+ Wrappi_accumulator.add_struct sd
+ >>
+
+let () =
+ (* Quotation expander for C code. *)
+ let c_quotation_expander _loc _ code =
+ let loc = expr_of_loc _loc _loc in
+
+ (* XXX Expand %- or $- expressions in code. *)
+ (* XXX Escape >> in code. *)
+
+ <:expr< { Wrappi_types.cc_loc = $loc$;
+ cc_code = $str:code$ } >>
+ in
+ Quotation.add "c" Quotation.DynAst.expr_tag c_quotation_expander;
+
+ (* Default quotation expander (<< .. >>) should be C code ("c"). *)
+ Quotation.default := "c"
+
+;;
+
+(* Extend the regular OCaml grammar. *)
+EXTEND Gram
+ GLOBAL: str_item;
+
+ (* A parameter or return type. *)
+ ptype: [
+ [ "bool" -> <:expr< Wrappi_types.TBool >> ]
+ | [ "buffer" -> <:expr< Wrappi_types.TBuffer >> ]
+ | [ "enum"; name = LIDENT -> <:expr< Wrappi_types.TEnum $str:name$ >> ]
+ | [ "file" -> <:expr< Wrappi_types.TFile >> ]
+ | [ "hash"; "("; t = ptype; ")" -> <:expr< Wrappi_types.THash $t$ >> ]
+ | [ "int" -> <:expr< Wrappi_types.TInt >> ]
+ | [ "int32" -> <:expr< Wrappi_types.TInt32 >> ]
+ | [ "int64" -> <:expr< Wrappi_types.TInt64 >> ]
+ | [ "list"; "("; t = ptype; ")" -> <:expr< Wrappi_types.TList $t$ >> ]
+ | [ "nullable"; "("; t = ptype; ")" -> <:expr< Wrappi_types.TNullable $t$ >> ]
+ | [ "string" -> <:expr< Wrappi_types.TString >> ]
+ | [ "struct"; name = LIDENT -> <:expr< Wrappi_types.TStruct $str:name$ >> ]
+ | [ "uint32" -> <:expr< Wrappi_types.TUInt32 >> ]
+ | [ "uint64" -> <:expr< Wrappi_types.TUInt64 >> ]
+ | [ "union"; name = LIDENT -> <:expr< Wrappi_types.TUnion $str:name$ >> ]
+ | [ name = LIDENT -> <:expr< Wrappi_types.TTypedef $str:name$ >> ]
+ ];
+
+ (* A return type. *)
+ rtype: [
+ [ "void" -> <:expr< Wrappi_types.RVoid >> ]
+ | [ "static_string" -> <:expr< Wrappi_types.RStaticString >> ]
+ | [ t = ptype -> <:expr< Wrappi_types.Return $t$ >> ]
+ ];
+
+ (* A single function parameter. XXX Preconditions. *)
+ parameter: [[ t = ptype; name = LIDENT -> (name, t) ]];
+
+ (* A single struct field. XXX Preconditions. *)
+ struct_field: [[ t = ptype; name = LIDENT -> (name, t) ]];
+
+ str_item: LEVEL "top" [
+ [ "entry_point";
+ local = OPT "local";
+ rtype = rtype; name = LIDENT;
+ "("; parameters = LIST0 parameter SEP ","; ")";
+ code = OPT [ code = expr -> code ];
+ includes = OPT [ "includes"; includes = expr -> includes ]
+ ->
+ add_entry_point _loc local name parameters rtype code includes
+ ]
+
+ | [ "enum"; name = LIDENT; identifiers = expr ->
+ add_enum _loc name identifiers
+ ]
+
+ | [ "struct"; name = LIDENT; "{";
+ fields = LIST0 struct_field SEP ";";
+ "}" ->
+ add_struct _loc name fields
+ ]
+
+ | [ "typedef"; t = ptype; name = LIDENT ->
+ add_typedef _loc name t
+ ]
+ ];
+
+END
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