%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1996-2009. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
%%
%% %CopyrightEnd%
%%
-module(misc_supp).
%%%---------------------------------------------------------------------
%%% Description:
%%% This module contains MISCellaneous routines for the SUPPort tools.
%%% 1) The function format_pdict/3 is called by every process that
%%% wants to format its process dictionary.
%%% 2) Very generic functions such as, multi_map, is_string...
%%%
%%% This module is a part of the BOS. (format_pdict is called from
%%% init, memsup, disksup, overload (but not the fileserver since it
%%% formats its pdict its own way).)
%%%---------------------------------------------------------------------
-export([format_pdict/3, format_tuples/2, assq/2, passq/2, is_string/1,
multi_map/2]).
%%-----------------------------------------------------------------
%% Uses format_tuples to format the data in process dictionary.
%% This function is called from format_status_info by several modules
%% that want to format its process dictionary.
%% Args: Exclude is: list of atoms to exclude
%%-----------------------------------------------------------------
format_pdict(normal, _PDict, _Exclude) ->
[];
format_pdict(all, PDict, Exclude) ->
case format_tuples(PDict, ['$sys_dict$' | Exclude]) of
[] -> [];
Data -> [{newline, 1} | Data]
end.
%%-----------------------------------------------------------------
%% Format all Key value tuples except for the Keys in the
%% Exclude list.
%%-----------------------------------------------------------------
format_tuples(KeyValues, Exclude) ->
case format_tuples(KeyValues, Exclude, []) of
[] -> [];
Data -> [{data, Data}]
end.
format_tuples([], _Exclude, Res) -> Res;
format_tuples([{Key, Value} | T], Exclude, Res) ->
case lists:member(Key, Exclude) of
true ->
format_tuples(T, Exclude, Res);
false ->
format_tuples(T, Exclude, [{Key, Value} | Res])
end.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% "Very" generic misc stuff:
%%--------------------------------------------------
assq(Key, List) ->
case lists:keysearch(Key, 1, List) of
{value, {Key, Val}} -> {value, Val};
_ -> false
end.
%% Primitive assq. Use to get items from a process dictionary list.
passq(Key, List) ->
case lists:keysearch(Key, 1, List) of
{value, {Key, Val}} -> Val;
_ -> undefined
end.
%% This one doesn't treat [] as a string (as io_lib:char_list)
is_string([]) -> false;
is_string(X) -> is_string_2(X).
is_string_2([]) -> true;
is_string_2([H|T]) when is_integer(H), H >= $ , H =< 255 ->
is_string_2(T);
is_string_2(_) -> false.
%%-----------------------------------------------------------------
%% Pre: ListOfLists is a list of N lists, each of length M.
%% Func is a function of arity N.
%% Returns: A list of length M where element Y is the result of
%% applying Func on [Elem(Y, List1), ..., Elem(Y, ListN)].
%%-----------------------------------------------------------------
multi_map(_Func, [[] | _ListOfLists]) -> [];
multi_map(Func, ListOfLists) ->
[apply(Func, lists:map(fun(List) -> hd(List) end, ListOfLists)) |
multi_map(Func,
lists:map(fun(List) -> tl(List) end, ListOfLists))].
