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%% This Source Code Form is subject to the terms of the Mozilla Public
%% License, v. 2.0. If a copy of the MPL was not distributed with this
%% file, You can obtain one at https://mozilla.org/MPL/2.0/.
%%
%% Copyright (c) 2007-2020 VMware, Inc. or its affiliates. All rights reserved.
%%
-module(amqp10_binary_parser).
-export([parse/1, parse_all/1]).
-include("amqp10_framing.hrl").
% -spec parse(binary()) -> tuple().
parse_all(ValueBin) when is_binary(ValueBin) ->
lists:reverse(parse_all([], parse(ValueBin))).
parse_all(Acc, {Value, <<>>}) -> [Value | Acc];
parse_all(Acc, {Value, Rest}) -> parse_all([Value | Acc], parse(Rest)).
-spec parse(binary()) ->
{amqp10_binary_generator:amqp10_type(), binary()}.
parse(<<?DESCRIBED,Rest/binary>>) ->
parse_described(Rest);
parse(Rest) ->
parse_primitive0(Rest).
parse_described(Bin) ->
{Descriptor, Rest1} = parse(Bin),
{Value, Rest2} = parse(Rest1),
{{described, Descriptor, Value}, Rest2}.
parse_primitive0(<<Type,Rest/binary>>) ->
parse_primitive(Type, Rest).
%% Constants
parse_primitive(16#40, Rest) -> {null, Rest};
parse_primitive(16#41, Rest) -> {true, Rest};
parse_primitive(16#42, Rest) -> {false, Rest};
parse_primitive(16#43, Rest) -> {{uint, 0}, Rest};
parse_primitive(16#44, Rest) -> {{ulong, 0}, Rest};
%% Fixed-widths. Most integral types have a compact encoding as a byte.
parse_primitive(16#50, <<V:8/unsigned, R/binary>>) -> {{ubyte, V}, R};
parse_primitive(16#51, <<V:8/signed, R/binary>>) -> {{byte, V}, R};
parse_primitive(16#52, <<V:8/unsigned, R/binary>>) -> {{uint, V}, R};
parse_primitive(16#53, <<V:8/unsigned, R/binary>>) -> {{ulong, V}, R};
parse_primitive(16#54, <<V:8/signed, R/binary>>) -> {{int, V}, R};
parse_primitive(16#55, <<V:8/signed, R/binary>>) -> {{long, V}, R};
parse_primitive(16#56, <<0:8/unsigned, R/binary>>) -> {{boolean, false},R};
parse_primitive(16#56, <<1:8/unsigned, R/binary>>) -> {{boolean, true}, R};
parse_primitive(16#60, <<V:16/unsigned, R/binary>>) -> {{ushort, V}, R};
parse_primitive(16#61, <<V:16/signed, R/binary>>) -> {{short, V}, R};
parse_primitive(16#70, <<V:32/unsigned, R/binary>>) -> {{uint, V}, R};
parse_primitive(16#71, <<V:32/signed, R/binary>>) -> {{int, V}, R};
parse_primitive(16#72, <<V:32/float, R/binary>>) -> {{float, V}, R};
parse_primitive(16#73, <<Utf32:4/binary,R/binary>>) -> {{char, Utf32}, R};
parse_primitive(16#80, <<V:64/unsigned, R/binary>>) -> {{ulong, V}, R};
parse_primitive(16#81, <<V:64/signed, R/binary>>) -> {{long, V}, R};
parse_primitive(16#82, <<V:64/float, R/binary>>) -> {{double, V}, R};
parse_primitive(16#83, <<TS:64/signed, R/binary>>) -> {{timestamp, TS}, R};
parse_primitive(16#98, <<Uuid:16/binary,R/binary>>) -> {{uuid, Uuid}, R};
%% Variable-widths
parse_primitive(16#a0,<<S:8/unsigned, V:S/binary,R/binary>>)-> {{binary, V}, R};
parse_primitive(16#a1,<<S:8/unsigned, V:S/binary,R/binary>>)-> {{utf8, V}, R};
parse_primitive(16#a3,<<S:8/unsigned, V:S/binary,R/binary>>)-> {{symbol, V}, R};
parse_primitive(16#b3,<<S:32/unsigned,V:S/binary,R/binary>>)-> {{symbol, V}, R};
parse_primitive(16#b0,<<S:32/unsigned,V:S/binary,R/binary>>)-> {{binary, V}, R};
parse_primitive(16#b1,<<S:32/unsigned,V:S/binary,R/binary>>)-> {{utf8, V}, R};
%% Compounds
parse_primitive(16#45, R) ->
{{list, []}, R};
parse_primitive(16#c0,<<S:8/unsigned,CountAndValue:S/binary,R/binary>>) ->
{{list, parse_compound(8, CountAndValue)}, R};
parse_primitive(16#c1,<<S:8/unsigned,CountAndValue:S/binary,R/binary>>) ->
List = parse_compound(8, CountAndValue),
{{map, mapify(List)}, R};
parse_primitive(16#d0,<<S:32/unsigned,CountAndValue:S/binary,R/binary>>) ->
{{list, parse_compound(32, CountAndValue)}, R};
parse_primitive(16#d1,<<S:32/unsigned,CountAndValue:S/binary,R/binary>>) ->
List = parse_compound(32, CountAndValue),
{{map, mapify(List)}, R};
%% Arrays
parse_primitive(16#e0,<<S:8/unsigned,CountAndV:S/binary,R/binary>>) ->
{parse_array(8, CountAndV), R};
parse_primitive(16#f0,<<S:32/unsigned,CountAndV:S/binary,R/binary>>) ->
{parse_array(32, CountAndV), R};
%% NaN or +-inf
parse_primitive(16#72, <<V:32, R/binary>>) ->
{{as_is, 16#72, <<V:32>>}, R};
parse_primitive(16#82, <<V:64, R/binary>>) ->
{{as_is, 16#82, <<V:64>>}, R};
%% decimals
parse_primitive(16#74, <<V:32, R/binary>>) ->
{{as_is, 16#74, <<V:32>>}, R};
parse_primitive(16#84, <<V:64, R/binary>>) ->
{{as_is, 16#84, <<V:64>>}, R};
parse_primitive(16#94, <<V:128, R/binary>>) ->
{{as_is, 16#94, <<V:128>>}, R};
parse_primitive(Type, _Bin) ->
throw({primitive_type_unsupported, Type, _Bin}).
parse_compound(UnitSize, Bin) ->
<<Count:UnitSize, Bin1/binary>> = Bin,
parse_compound1(Count, Bin1, []).
parse_compound1(0, <<>>, List) ->
lists:reverse(List);
parse_compound1(_Left, <<>>, List) ->
case application:get_env(rabbitmq_amqp1_0, protocol_strict_mode) of
{ok, false} -> lists:reverse(List); %% ignore miscount
{ok, true} -> throw(compound_datatype_miscount)
end;
parse_compound1(Count, Bin, Acc) ->
{Value, Rest} = parse(Bin),
parse_compound1(Count - 1, Rest, [Value | Acc]).
%% array structure is {array, Ctor, [Data]}
%% e.g. {array, symbol, [<<"amqp:accepted:list">>]}
parse_array(UnitSize, Bin) ->
<<Count:UnitSize, Bin1/binary>> = Bin,
parse_array1(Count, Bin1).
parse_array1(Count, <<?DESCRIBED, Rest/binary>>) ->
{Descriptor, Rest1} = parse(Rest),
{array, Type, List} = parse_array1(Count, Rest1),
Values = lists:map(fun (Value) ->
{described, Descriptor, Value}
end, List),
% this format cannot represent an empty array of described types
{array, {described, Descriptor, Type}, Values};
parse_array1(Count, <<Type, ArrayBin/binary>>) ->
parse_array2(Count, Type, ArrayBin, []).
parse_array2(0, Type, <<>>, Acc) ->
{array, parse_constructor(Type), lists:reverse(Acc)};
parse_array2(Count, Type, Bin, Acc) ->
{Value, Rest} = parse_primitive(Type, Bin),
parse_array2(Count - 1, Type, Rest, [Value | Acc]).
parse_constructor(16#a3) -> symbol;
parse_constructor(16#b3) -> symbol;
parse_constructor(16#a1) -> utf8;
parse_constructor(16#b1) -> utf8;
parse_constructor(16#50) -> ubyte;
parse_constructor(16#51) -> byte;
parse_constructor(16#60) -> ushort;
parse_constructor(16#61) -> short;
parse_constructor(16#70) -> uint;
parse_constructor(16#71) -> int;
parse_constructor(16#80) -> ulong;
parse_constructor(16#81) -> long;
parse_constructor(16#40) -> null;
parse_constructor(16#56) -> boolean;
parse_constructor(16#f0) -> array;
parse_constructor(0) -> described;
parse_constructor(X) ->
exit({failed_to_parse_constructor, X}).
mapify([]) ->
[];
mapify([Key, Value | Rest]) ->
[{Key, Value} | mapify(Rest)].
|
