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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 Q Public License version 1.0. *)
(* *)
(***********************************************************************)
(* To print values *)
open Format
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 ppf depth obj ty =
if depth <= 0 then begin
let n = name_value obj ty in
Some (Outcometree.Oval_stuff ("$" ^ string_of_int n))
end else None
module EvalPath =
struct
type valu = Debugcom.Remote_value.t
exception Error
let rec eval_path env = function
Pident id ->
begin try
Debugcom.Remote_value.global (Symtable.get_global_position id)
with Symtable.Error _ ->
raise Error
end
| Pdot(root, fieldname, pos) ->
let v = eval_path env root in
if not (Debugcom.Remote_value.is_block v)
then raise Error
else Debugcom.Remote_value.field v pos
| Papply(p1, p2) ->
raise Error
let same_value = Debugcom.Remote_value.same
end
module Printer = Genprintval.Make(Debugcom.Remote_value)(EvalPath)
let install_printer path ty ppf fn =
Printer.install_printer path ty
(fun ppf remote_val ->
try
fn ppf (Obj.repr (Debugcom.Remote_value.obj remote_val))
with
Debugcom.Marshalling_error ->
fprintf ppf "<cannot fetch remote object>")
let remove_printer = Printer.remove_printer
let max_printer_depth = ref 20
let max_printer_steps = ref 300
let print_exception ppf obj =
let t = Printer.outval_of_untyped_exception obj in
!Oprint.out_value ppf t
let print_value max_depth env obj (ppf : Format.formatter) ty =
let t =
Printer.outval_of_value !max_printer_steps max_depth
(check_depth ppf) env obj ty in
!Oprint.out_value ppf t
let print_named_value max_depth exp env obj ppf ty =
let print_value_name ppf = function
| E_ident lid ->
Printtyp.longident ppf lid
| E_name n ->
fprintf ppf "$%i" n
| _ ->
let n = name_value obj ty in
fprintf ppf "$%i" n in
Printtyp.reset_and_mark_loops ty;
fprintf ppf "@[<2>%a:@ %a@ =@ %a@]@."
print_value_name exp
Printtyp.type_expr ty
(print_value max_depth env obj) ty
|
