107 lines
3.2 KiB
OCaml
107 lines
3.2 KiB
OCaml
(***********************************************************************)
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(* *)
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(* OCaml *)
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(* *)
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(* Jerome Vouillon, projet Cristal, INRIA Rocquencourt *)
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(* OCaml port by John Malecki and Xavier Leroy *)
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(* *)
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(* Copyright 1996 Institut National de Recherche en Informatique et *)
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(* en Automatique. All rights reserved. This file is distributed *)
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(* under the terms of the Q Public License version 1.0. *)
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(* *)
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(***********************************************************************)
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(* To print values *)
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open Format
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open Parser_aux
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open Path
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open Types
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(* To name printed and ellipsed values *)
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let named_values =
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(Hashtbl.create 29 : (int, Debugcom.Remote_value.t * type_expr) Hashtbl.t)
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let next_name = ref 1
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let reset_named_values () =
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Hashtbl.clear named_values;
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next_name := 1
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let name_value v ty =
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let name = !next_name in
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incr next_name;
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Hashtbl.add named_values name (v, ty);
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name
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let find_named_value name =
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Hashtbl.find named_values name
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let check_depth ppf depth obj ty =
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if depth <= 0 then begin
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let n = name_value obj ty in
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Some (Outcometree.Oval_stuff ("$" ^ string_of_int n))
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end else None
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module EvalPath =
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struct
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type valu = Debugcom.Remote_value.t
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exception Error
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let rec eval_path env = function
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Pident id ->
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begin try
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Debugcom.Remote_value.global (Symtable.get_global_position id)
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with Symtable.Error _ ->
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raise Error
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end
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| Pdot(root, fieldname, pos) ->
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let v = eval_path env root in
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if not (Debugcom.Remote_value.is_block v)
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then raise Error
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else Debugcom.Remote_value.field v pos
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| Papply(p1, p2) ->
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raise Error
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let same_value = Debugcom.Remote_value.same
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end
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module Printer = Genprintval.Make(Debugcom.Remote_value)(EvalPath)
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let install_printer path ty ppf fn =
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Printer.install_printer path ty
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(fun ppf remote_val ->
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try
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fn ppf (Obj.repr (Debugcom.Remote_value.obj remote_val))
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with
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Debugcom.Marshalling_error ->
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fprintf ppf "<cannot fetch remote object>")
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let remove_printer = Printer.remove_printer
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let max_printer_depth = ref 20
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let max_printer_steps = ref 300
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let print_exception ppf obj =
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let t = Printer.outval_of_untyped_exception obj in
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!Oprint.out_value ppf t
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let print_value max_depth env obj (ppf : Format.formatter) ty =
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let t =
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Printer.outval_of_value !max_printer_steps max_depth
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(check_depth ppf) env obj ty in
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!Oprint.out_value ppf t
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let print_named_value max_depth exp env obj ppf ty =
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let print_value_name ppf = function
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| E_ident lid ->
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Printtyp.longident ppf lid
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| E_name n ->
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fprintf ppf "$%i" n
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| _ ->
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let n = name_value obj ty in
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fprintf ppf "$%i" n in
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Printtyp.reset_and_mark_loops ty;
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fprintf ppf "@[<2>%a:@ %a@ =@ %a@]@."
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print_value_name exp
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Printtyp.type_expr ty
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(print_value max_depth env obj) ty
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