Imported Upstream version 0.1

[pkg-cerco/acc-trusted.git] / cparser / Main.ml

diff --git a/cparser/Main.ml b/cparser/Main.ml
new file mode 100644 (file)
index 0000000..3b93d66
--- /dev/null
+++ b/cparser/Main.ml
@@ -0,0 +1,83 @@
+(* *********************************************************************)
+(*                                                                     *)
+(*              The Compcert verified compiler                         *)
+(*                                                                     *)
+(*          Xavier Leroy, INRIA Paris-Rocquencourt                     *)
+(*                                                                     *)
+(*  Copyright Institut National de Recherche en Informatique et en     *)
+(*  Automatique.  All rights reserved.  This file is distributed       *)
+(*  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 file is also distributed *)
+(*  under the terms of the INRIA Non-Commercial License Agreement.     *)
+(*                                                                     *)
+(* *********************************************************************)
+
+(* Wrapper around gcc to parse, transform, pretty-print, and call gcc on result *)
+
+let transfs = ref ""
+
+let safe_remove name =
+  try Sys.remove name with Sys_error _ -> ()
+
+let process_c_file prepro_opts name =
+  let ppname = Filename.temp_file "cparser" ".i" in
+  let cpname = Filename.chop_suffix name ".c" ^ ".i" in
+  let rc =
+    Sys.command
+      (Printf.sprintf "gcc -E -U__GNUC__ %s %s > %s"
+                      (String.concat " " (List.map Filename.quote prepro_opts))
+                      (Filename.quote name) (Filename.quote ppname)) in
+  if rc <> 0 then begin
+    safe_remove ppname;
+    exit 2
+  end;
+  let r = Parse.preprocessed_file !transfs name ppname in
+  safe_remove ppname;
+  match r with
+  | None -> exit 2
+  | Some p -> 
+      let oc = open_out cpname in
+      let oform = Format.formatter_of_out_channel oc in
+      Cprint.program oform p;
+      close_out oc;
+      cpname
+
+let starts_with pref s =
+  String.length s >= String.length pref 
+  && String.sub s 0 (String.length pref) = pref
+
+let ends_with suff s =
+  String.length s >= String.length suff 
+  && String.sub s (String.length s - String.length suff) (String.length suff)
+     = suff
+
+let rec parse_cmdline prepro args i =
+  if i >= Array.length Sys.argv then List.rev args else begin
+    (* should skip arguments more cleanly... *)
+    let s = Sys.argv.(i) in
+    if s = "-Xsimplif" && i + 1 < Array.length Sys.argv then begin
+      transfs := Sys.argv.(i+1);
+      parse_cmdline prepro args (i+2)
+    end else if (s = "-I" || s = "-D" || s = "-U") 
+             && i + 1 < Array.length Sys.argv then 
+      parse_cmdline (Sys.argv.(i+1) :: s :: prepro) args (i+2)
+    else if starts_with "-I" s
+             || starts_with "-D" s
+             || starts_with "-U" s then
+      parse_cmdline (s :: prepro) args (i + 1)
+    else if s = "-Wall" then
+      parse_cmdline prepro ("-Wno-parentheses" :: "-Wall" :: args) (i+1)
+    else if ends_with ".c" s then begin
+      let s' = process_c_file (List.rev prepro) s in
+      parse_cmdline prepro (s' :: args) (i + 1)
+    end else
+      parse_cmdline prepro (s :: args) (i + 1)
+  end
+
+let _ =
+  Builtins.set GCC.builtins;
+  let args = parse_cmdline [] [] 1 in
+  let cmd = "gcc " ^ String.concat " " (List.map Filename.quote args) in
+  let rc = Sys.command cmd in
+  exit rc