Implement command line options, clean-up screen output.

[tatoo.git] / src / tatoo.ml

diff --git a/src/tatoo.ml b/src/tatoo.ml
index 1b8c17d..6dc66ef 100644 (file)
--- a/src/tatoo.ml
+++ b/src/tatoo.ml
@@ -14,39 +14,65 @@
 (***********************************************************************)
 
 (*
-  Time-stamp: <Last modified on 2013-04-04 18:45:43 CEST by Kim Nguyen>
+  Time-stamp: <Last modified on 2013-04-22 17:26:34 CEST by Kim Nguyen>
 *)
 
-let doc =
-  let fd = open_in Sys.argv.(1) in
-  let d = Naive_tree.load_xml_file fd in
-  close_in fd; d
-
-
-let query =
-  let arg2 = Sys.argv.(2) in
-  Xpath.Parser.parse (Ulexing.from_latin1_string arg2)
-
-let auto =
-  Xpath.Compile.path query
-
 open Format
 
-let () =
-  fprintf err_formatter "Query: %a\n%!" Xpath.Ast.print_path query;
-  fprintf err_formatter "Automata: %a\n%!" Ata.print auto;
-  fprintf err_formatter "Evaluating automaton:\n%!";
+let main () =
+  let () = Options.parse () in
+  let doc =
+    let fd = open_in !Options.input_file in
+    let d = Naive_tree.load_xml_file fd in
+    close_in fd; d
+  in
+  let query =
+    Xpath.Parser.parse (Ulexing.from_latin1_string !Options.query)
+  in
+  let auto =
+    Xpath.Compile.path query
+  in
+  let output =
+    match !Options.output_file with
+    | None | Some "-" | Some "/dev/stdout" -> stdout
+    | Some f -> open_out f
+  in
+  if !Options.stats then begin
+    fprintf err_formatter "@[STATS: Query: %a @]@." Xpath.Ast.print_path query;
+    fprintf err_formatter "@[STATS: @[Automaton: @\n";
+    Ata.print err_formatter auto;
+    fprintf err_formatter "@]@]@.";
+  end;
   let module Naive = Eval.Make(Naive_tree) in
   let t1 = Unix.gettimeofday() in
   let results = Naive.eval auto doc (Naive_tree.root doc) in
   let teval = (Unix.gettimeofday () -. t1) *. 1000. in
   let t1 = Unix.gettimeofday () in
-  output_string stdout "<xml_result>\n";
-  List.iter (fun n ->
-    Naive_tree.print_xml stdout doc n;
-    output_char stdout '\n'
-  ) results;
-  output_string stdout "</xml_result>\n";
+  output_string output "<xml_result>\n";
+  if !Options.count then begin
+    output_string output (string_of_int (List.length results));
+    output_char output '\n';
+  end else
+    List.iter (fun n ->
+      Naive_tree.print_xml output doc n;
+      output_char output '\n'
+    ) results;
+  output_string output "</xml_result>\n";
   let tprint = (Unix.gettimeofday () -. t1) *. 1000. in
-  flush stdout;
-  fprintf err_formatter "evaluation time: %fms\nserialization time: %fms\n%!" teval tprint
+  flush output;
+  if output != stdout then close_out output;
+  if !Options.stats then begin
+    fprintf err_formatter "@[STATS: evaluation time: %fms@]@." teval;
+    fprintf err_formatter "@[STATS: serialization time: %fms@]@." tprint
+  end
+
+
+let () =
+  try
+    main ()
+  with
+    Arg.Bad msg -> eprintf "Error: %s\n%!" msg; Options.usage (); exit 1
+  | Sys_error msg -> eprintf "Error: %s\n%!" msg; exit 2
+  | Tree.Parse_error msg -> eprintf "Error: file %s, %s\n%!" !Options.input_file msg; exit 3
+  | Xpath.Ulexer.Error (s, e, msg) -> eprintf "Error: character %i-%i: %s\n%!" s e msg; exit 4
+  | e -> eprintf "FATAL ERROR: %s\n%!" (Printexc.to_string e); exit 128