ocaml/debugger/printval.ml

90 lines
2.6 KiB
OCaml

(***********************************************************************)
(* *)
(* Objective Caml *)
(* *)
(* Jerome Vouillon, projet Cristal, INRIA Rocquencourt *)
(* Objective Caml port by John Malecki and Xavier Leroy *)
(* *)
(* Copyright 1996 Institut National de Recherche en Informatique et *)
(* en Automatique. All rights reserved. This file is distributed *)
(* under the terms of the Q Public License version 1.0. *)
(* *)
(***********************************************************************)
(* $Id$ *)
(* To print values *)
open Misc
open Obj
open Formatmsg
open Parser_aux
open Path
open Types
(* To name printed and ellipsed values *)
let named_values =
(Hashtbl.create 29 : (int, Debugcom.Remote_value.t * type_expr) Hashtbl.t)
let next_name = ref 1
let reset_named_values () =
Hashtbl.clear named_values;
next_name := 1
let name_value v ty =
let name = !next_name in
incr next_name;
Hashtbl.add named_values name (v, ty);
name
let find_named_value name =
Hashtbl.find named_values name
let check_depth depth obj ty =
if depth <= 0 then begin
let n = name_value obj ty in
print_char '$'; print_int n;
false
end else true
module Printer = Genprintval.Make(Debugcom.Remote_value)
let install_printer path ty fn =
Printer.install_printer path ty
(function remote_val ->
try
fn (Obj.repr (Debugcom.Remote_value.obj remote_val))
with
Debugcom.Marshalling_error ->
print_string "<cannot fetch remote object>")
let remove_printer = Printer.remove_printer
let max_printer_depth = ref 20
let max_printer_steps = ref 300
let print_exception = Printer.print_exception
let print_value max_depth obj ty env =
Printer.print_value !max_printer_steps max_depth
check_depth env obj ty
let print_named_value max_depth exp obj ty env =
open_box 2;
begin match exp with
E_ident lid ->
Printtyp.longident lid
| E_name n ->
print_char '$'; print_int n
| _ ->
let n = name_value obj ty in
print_char '$'; print_int n
end;
Printtyp.reset (); Printtyp.mark_loops ty;
print_string " :"; print_space(); Printtyp.type_expr ty;
print_space(); print_string "="; print_space();
print_value max_depth obj ty env;
close_box();
print_newline()