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Diffstat (limited to 'lib/asn1/src/asn1ct_name.erl')
| -rw-r--r-- | lib/asn1/src/asn1ct_name.erl | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/lib/asn1/src/asn1ct_name.erl b/lib/asn1/src/asn1ct_name.erl new file mode 100644 index 0000000000..a6aa4255cc --- /dev/null +++ b/lib/asn1/src/asn1ct_name.erl @@ -0,0 +1,233 @@ +%% +%% %CopyrightBegin% +%% +%% Copyright Ericsson AB 1997-2009. 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(asn1ct_name). + +%%-compile(export_all). +-export([name_server_loop/1, + start/0, + stop/0, + push/1, + pop/1, + curr/1, + clear/0, + delete/1, + active/1, + prev/1, + next/1, + all/1, + new/1]). + +start() -> + start_server(asn1_ns, asn1ct_name,name_server_loop,[[]]). + +stop() -> stop_server(asn1_ns). + +name_server_loop(Vars) -> +%% io:format("name -- ~w~n",[Vars]), + receive + {From,{current,Variable}} -> + From ! {asn1_ns,get_curr(Vars,Variable)}, + name_server_loop(Vars); + {From,{pop,Variable}} -> + From ! {asn1_ns,done}, + name_server_loop(pop_var(Vars,Variable)); + {From,{push,Variable}} -> + From ! {asn1_ns,done}, + name_server_loop(push_var(Vars,Variable)); + {From,{delete,Variable}} -> + From ! {asn1_ns,done}, + name_server_loop(delete_var(Vars,Variable)); + {From,{new,Variable}} -> + From ! {asn1_ns,done}, + name_server_loop(new_var(Vars,Variable)); + {From,{prev,Variable}} -> + From ! {asn1_ns,get_prev(Vars,Variable)}, + name_server_loop(Vars); + {From,{next,Variable}} -> + From ! {asn1_ns,get_next(Vars,Variable)}, + name_server_loop(Vars); + {From,stop} -> + unregister(asn1_ns), + From ! {asn1_ns,stopped}, + exit(normal) + end. + +active(V) -> + case curr(V) of + nil -> false; + _ -> true + end. + +req(Req) -> + asn1_ns ! {self(), Req}, + receive {asn1_ns, Reply} -> Reply end. + +pop(V) -> req({pop,V}). +push(V) -> req({push,V}). +clear() -> req(stop), start(). +curr(V) -> req({current,V}). +new(V) -> req({new,V}). +delete(V) -> req({delete,V}). +prev(V) -> + case req({prev,V}) of + none -> + exit('cant get prev of none'); + Rep -> Rep + end. + +next(V) -> + case req({next,V}) of + none -> + exit('cant get next of none'); + Rep -> Rep + end. + +all(V) -> + Curr = curr(V), + if Curr == V -> []; + true -> + lists:reverse(generate(V,last(Curr),[],0)) + end. + +generate(V,Number,Res,Pos) -> + Ell = Pos+1, + if + Ell > Number -> + Res; + true -> + generate(V,Number,[list_to_atom(lists:concat([V,Ell]))|Res],Ell) + end. + +last(V) -> + last2(lists:reverse(atom_to_list(V))). + +last2(RevL) -> + list_to_integer(lists:reverse(get_digs(RevL))). + + +get_digs([H|T]) -> + if + H < $9+1, + H > $0-1 -> + [H|get_digs(T)]; + true -> + [] + end. + +push_var(Vars,Variable) -> + case lists:keysearch(Variable,1,Vars) of + false -> + [{Variable,[0]}|Vars]; + {value,{Variable,[Digit|Drest]}} -> + NewVars = lists:keydelete(Variable,1,Vars), + [{Variable,[Digit,Digit|Drest]}|NewVars] + end. + +pop_var(Vars,Variable) -> + case lists:keysearch(Variable,1,Vars) of + false -> + ok; + {value,{Variable,[_Dig]}} -> + lists:keydelete(Variable,1,Vars); + {value,{Variable,[_Dig|Digits]}} -> + NewVars = lists:keydelete(Variable,1,Vars), + [{Variable,Digits}|NewVars] + end. + +get_curr([],Variable) -> + Variable; +get_curr([{Variable,[0|_Drest]}|_Tail],Variable) -> + Variable; +get_curr([{Variable,[Digit|_Drest]}|_Tail],Variable) -> + list_to_atom(lists:concat([Variable,integer_to_list(Digit)])); + +get_curr([_|Tail],Variable) -> + get_curr(Tail,Variable). + +new_var(Vars,Variable) -> + case lists:keysearch(Variable,1,Vars) of + false -> + [{Variable,[1]}|Vars]; + {value,{Variable,[Digit|Drest]}} -> + NewVars = lists:keydelete(Variable,1,Vars), + [{Variable,[Digit+1|Drest]}|NewVars] + end. + +delete_var(Vars,Variable) -> + case lists:keysearch(Variable,1,Vars) of + false -> + Vars; + {value,{Variable,[N]}} when N =< 1 -> + lists:keydelete(Variable,1,Vars); + {value,{Variable,[Digit|Drest]}} -> + case Digit of + 0 -> + Vars; + _ -> + NewVars = lists:keydelete(Variable,1,Vars), + [{Variable,[Digit-1|Drest]}|NewVars] + end + end. + +get_prev(Vars,Variable) -> + case lists:keysearch(Variable,1,Vars) of + false -> + none; + {value,{Variable,[Digit|_]}} when Digit =< 1 -> + Variable; + {value,{Variable,[Digit|_]}} when Digit > 1 -> + list_to_atom(lists:concat([Variable, + integer_to_list(Digit-1)])); + _ -> + none + end. + +get_next(Vars,Variable) -> + case lists:keysearch(Variable,1,Vars) of + false -> + list_to_atom(lists:concat([Variable,"1"])); + {value,{Variable,[Digit|_]}} when Digit >= 0 -> + list_to_atom(lists:concat([Variable, + integer_to_list(Digit+1)])); + _ -> + none + end. + + +stop_server(Name) -> + stop_server(Name, whereis(Name)). +stop_server(_Name, undefined) -> stopped; +stop_server(Name, _Pid) -> + Name ! {self(), stop}, + receive {Name, _} -> stopped end. + + +start_server(Name,Mod,Fun,Args) -> + case whereis(Name) of + undefined -> + case catch register(Name, spawn(Mod,Fun, Args)) of + {'EXIT',{badarg,_}} -> + start_server(Name,Mod,Fun,Args); + _ -> + ok + end; + _Pid -> + already_started + end. |