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|
(**************************************************************************)
(* *)
(* OCaml *)
(* *)
(* Jerome Vouillon, projet Cristal, INRIA Rocquencourt *)
(* OCaml 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 GNU Lesser General Public License version 2.1, with the *)
(* special exception on linking described in the file LICENSE. *)
(* *)
(**************************************************************************)
(* To print values *)
open Format
open Parser_aux
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
Some (Outcometree.Oval_stuff ("$" ^ Int.to_string n))
end else None
module EvalPath =
struct
type valu = Debugcom.Remote_value.t
exception Error
let rec eval_address = function
| Env.Aident id ->
begin match Symtable.Global.of_ident id with
| Some global ->
begin
try Debugcom.Remote_value.global (Symtable.get_global_position
global)
with Symtable.Error _ -> raise Error
end
| None -> raise Error
end
| Env.Adot(root, pos) ->
let v = eval_address root in
if not (Debugcom.Remote_value.is_block v)
then raise Error
else Debugcom.Remote_value.field v pos
let same_value = Debugcom.Remote_value.same
end
module Printer = Genprintval.Make(Debugcom.Remote_value)(EvalPath)
let install_printer path ty _ppf fn =
Printer.install_printer path ty
(fun ppf remote_val ->
try
fn ppf (Obj.repr (Debugcom.Remote_value.obj remote_val))
with
Debugcom.Marshalling_error ->
fprintf ppf "<cannot fetch remote object>")
let remove_printer = Printer.remove_printer
let max_printer_depth = ref 20
let max_printer_steps = ref 300
let print_exception ppf obj =
let t = Printer.outval_of_untyped_exception obj in
!Oprint.out_value ppf t
let print_value max_depth env obj (ppf : Format.formatter) ty =
let t =
Printer.outval_of_value !max_printer_steps max_depth
check_depth env obj ty in
!Oprint.out_value ppf t
let print_named_value max_depth exp env obj ppf ty =
let print_value_name ppf = function
| E_ident lid ->
Printtyp.longident ppf lid
| E_name n ->
fprintf ppf "$%i" n
| _ ->
let n = name_value obj ty in
fprintf ppf "$%i" n in
fprintf ppf "@[<2>%a:@ %a@ =@ %a@]@."
print_value_name exp
Printtyp.type_expr ty
(print_value max_depth env obj) ty
|
