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fix parser

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anlicheng 2025-06-10 23:19:03 +08:00
parent b3536f31b7
commit 6b678e454f
1 changed files with 14 additions and 9 deletions
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23
apps/modbus/src/modbus_parser.erl
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@ -37,27 +37,28 @@ lexer(<<$\s, Rest/binary>>, Line, Current, Acc) ->
lexer(<<$\n, Rest/binary>>, Line, Current, Acc) ->
lexer(Rest, Line + 1, Current, Acc);
lexer(<<$\t, Rest/binary>>, Line, Current, Acc) ->
lexer(Rest, Line, Current, Acc);
lexer(Rest, Line, [" "|Current], Acc);
lexer(<<$#, Rest/binary>>, Line, _Current, Acc) ->
{Comment, NewRest} = read_until(Rest, <<$\n>>),
lexer(NewRest, Line + 1, [], [{comment, Line, Comment}|Acc]);
%% 处理特殊字符开头的行, ‘$=’ 不会是一行的开头
lexer(<<${, Rest/binary>>, Line, [], Acc) ->
lexer(Rest, Line, [], [{'{', Line}|Acc]);
lexer(<<$}, Rest/binary>>, Line, [], Acc) ->
lexer(Rest, Line, [], [{'}', Line}|Acc]);
lexer(<<$;, Rest/binary>>, Line, [], Acc) ->
lexer(Rest, Line, [], [{';', Line}|Acc]);
%% 在行中遇到特殊字符的处理逻辑
lexer(<<Char/utf8, Rest/binary>>, Line, Current, Acc) ->
case is_special(Char) of
true ->
NewAcc = case Current of
[] ->
Acc;
_ ->
Ident = list_to_binary(string:trim(lists:reverse(Current))),
[{ident, Line, Ident}|Acc]
end,
lexer(Rest, Line, [], [{special, Line, Char}|NewAcc]);
case Current of
[] ->
lexer(Rest, Line, [], [{special, Line, list_to_binary([Char])}|Acc]);
_ ->
Ident = list_to_binary(string:trim(lists:reverse(Current))),
lexer(Rest, Line, [], [{special, Line, list_to_binary([Char])}, {ident, Line, Ident}|Acc])
end;
false ->
lexer(Rest, Line, [Char|Current], Acc)
end.
@ -93,6 +94,10 @@ parser([{ident, _, <<"modbus">>}|Tokens], Stack) ->
parser(Tokens, [{block, modbus, []}|Stack]);
parser([{ident, _, <<"device">>}, {ident, _, Name}|Tokens], Stack) ->
parser(Tokens, [{block, {device, Name}, []}|Stack]);
parser([{ident, _, <<"processor">>}, {ident, _, Name}|Tokens], Stack) ->
parser(Tokens, [{block, {processor, Name}, []}|Stack]);
parser([{ident, _, <<"alarm">>}, {ident, _, Name}|Tokens], Stack) ->
parser(Tokens, [{block, {alarm, Name}, []}|Stack]);
parser([{ident, _Line, Name}, {special, _, $=}|Tokens], [{block, _, Props}|Stack]) ->
{Value, Rest} = parse_value(Tokens, []),
parser(Rest, [{block, Props#{binary_to_atom(Name, utf8) => Value}}|Stack]);