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diff --git a/tools/gallina.ml b/tools/gallina.ml
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+(************************************************************************)
+(*  v      *   The Coq Proof Assistant  /  The Coq Development Team     *)
+(* <O___,, * CNRS-Ecole Polytechnique-INRIA Futurs-Universite Paris Sud *)
+(*   \VV/  **************************************************************)
+(*    //   *      This file is distributed under the terms of the       *)
+(*         *       GNU Lesser General Public License Version 2.1        *)
+(************************************************************************)
+
+(* $Id: gallina.ml,v 1.2.16.1 2004/07/16 19:31:46 herbelin Exp $ *)
+
+open Gallina_lexer
+
+let vfiles = ref ([] : string list)
+
+let option_moins = ref false
+
+let option_stdout = ref false
+
+let traite_fichier f = 
+  try 
+    let chan_in = open_in (f^".v") in 
+    let buf = Lexing.from_channel chan_in in
+    if not !option_stdout then chan_out := open_out (f ^ ".g");
+    try 
+      while true do Gallina_lexer.action buf done
+    with Fin_fichier -> begin 
+      flush !chan_out;
+      close_in chan_in;
+      if not !option_stdout then close_out !chan_out
+    end
+  with Sys_error _ -> 
+    () 
+
+let traite_stdin () =
+  try
+    let buf = Lexing.from_channel stdin in
+    try 
+      while true do Gallina_lexer.action buf done
+    with Fin_fichier -> 
+      flush !chan_out
+  with Sys_error _ -> 
+    ()
+
+let gallina () =
+  let lg_command = Array.length Sys.argv in
+  if lg_command < 2 then begin
+    output_string stderr "Usage: gallina [-] [-stdout] file1 file2 ...\n";
+    flush stderr;
+    exit 1
+  end;
+  let treat = function
+    | "-" -> option_moins := true
+    | "-stdout" -> option_stdout := true
+    | "-nocomments" -> comments := false
+    | f -> 
+	if Filename.check_suffix f ".v" then
+       	  vfiles := (Filename.chop_suffix f ".v") :: !vfiles
+  in
+  Array.iter treat Sys.argv;
+  if !option_moins then
+    traite_stdin ()
+  else
+    List.iter traite_fichier !vfiles
+
+let _ = Printexc.catch gallina ()
+