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+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2000-2010. 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(bs_match_int_SUITE).
+
+-author('[email protected]').
+-export([all/1,init_per_testcase/2,fin_per_testcase/2,init_all/1,finish_all/1,
+ integer/1,signed_integer/1,dynamic/1,more_dynamic/1,mml/1]).
+
+-include("test_server.hrl").
+
+-import(lists, [seq/2]).
+
+all(suite) ->
+ [{conf,init_all,cases(),finish_all}].
+
+cases() ->
+ [integer,signed_integer,dynamic,more_dynamic,mml].
+
+init_per_testcase(_Case, Config) ->
+ test_lib:interpret(?MODULE),
+ Dog = test_server:timetrap(?t:minutes(4)),
+ [{watchdog,Dog}|Config].
+
+fin_per_testcase(_Case, Config) ->
+ Dog = ?config(watchdog, Config),
+ ?t:timetrap_cancel(Dog),
+ ok.
+
+init_all(Config) when is_list(Config) ->
+ ?line test_lib:interpret(?MODULE),
+ ?line true = lists:member(?MODULE, int:interpreted()),
+ ok.
+
+finish_all(Config) when is_list(Config) ->
+ ok.
+
+integer(suite) -> [];
+integer(Config) when list(Config) ->
+ ?line 0 = get_int(mkbin([])),
+ ?line 0 = get_int(mkbin([0])),
+ ?line 42 = get_int(mkbin([42])),
+ ?line 255 = get_int(mkbin([255])),
+ ?line 256 = get_int(mkbin([1,0])),
+ ?line 257 = get_int(mkbin([1,1])),
+ ?line 258 = get_int(mkbin([1,2])),
+ ?line 258 = get_int(mkbin([1,2])),
+ ?line 65534 = get_int(mkbin([255,254])),
+ ?line 16776455 = get_int(mkbin([255,253,7])),
+ ?line 4245492555 = get_int(mkbin([253,13,19,75])),
+ ?line Eight = [200,1,19,128,222,42,97,111],
+ ?line cmp128(Eight, uint(Eight)),
+ ?line fun_clause(catch get_int(mkbin(seq(1,5)))),
+ ok.
+
+get_int(<<I:0>>) -> I;
+get_int(<<I:8>>) -> I;
+get_int(<<I:16>>) -> I;
+get_int(<<I:24>>) -> I;
+get_int(<<I:32>>) -> I.
+
+cmp128(<<I:128>>, I) -> equal;
+cmp128(_B, _I) -> not_equal.
+
+signed_integer(suite) -> [];
+signed_integer(Config) when list(Config) ->
+ ?line {no_match,_} = sint(mkbin([])),
+ ?line {no_match,_} = sint(mkbin([1,2,3])),
+ ?line 127 = sint(mkbin([127])),
+ ?line -1 = sint(mkbin([255])),
+ ?line -128 = sint(mkbin([128])),
+ ?line 42 = sint(mkbin([42,255])),
+ ?line 127 = sint(mkbin([127,255])).
+
+sint(Bin) ->
+ case Bin of
+ <<I:8/signed>> -> I;
+ <<I:8/signed,_:3,_:5>> -> I;
+ Other -> {no_match,Other}
+ end.
+
+uint(L) -> uint(L, 0).
+uint([H|T], Acc) -> uint(T, Acc bsl 8 bor H);
+uint([], Acc) -> Acc.
+
+dynamic(Config) when list(Config) ->
+ dynamic(mkbin([255]), 8),
+ dynamic(mkbin([255,255]), 16),
+ dynamic(mkbin([255,255,255]), 24),
+ dynamic(mkbin([255,255,255,255]), 32),
+ ok.
+
+dynamic(Bin, S1) when S1 >= 0 ->
+ S2 = size(Bin) * 8 - S1,
+ dynamic(Bin, S1, S2, (1 bsl S1) - 1, (1 bsl S2) - 1),
+ dynamic(Bin, S1-1);
+dynamic(_Bin, _) -> ok.
+
+dynamic(Bin, S1, S2, A, B) ->
+% io:format("~p ~p ~p ~p\n", [S1,S2,A,B]),
+ case Bin of
+ <<A:S1,B:S2>> ->
+ io:format("~p ~p ~p ~p\n", [S1,S2,A,B]),
+ ok;
+ _Other ->
+ erlang:error(badmatch, [Bin,S1,S2,A,B])
+ end.
+
+more_dynamic(doc) -> "Extract integers at different alignments and of different sizes.";
+more_dynamic(Config) when list(Config) ->
+
+ % Unsigned big-endian numbers.
+ Unsigned = fun(Bin, List, SkipBef, N) ->
+ SkipAft = 8*size(Bin) - N - SkipBef,
+ <<_I1:SkipBef,Int:N,_I2:SkipAft>> = Bin,
+ Int = make_int(List, N, 0)
+ end,
+ ?line more_dynamic1(Unsigned, funny_binary(42)),
+
+ % Signed big-endian numbers.
+ Signed = fun(Bin, List, SkipBef, N) ->
+ SkipAft = 8*size(Bin) - N - SkipBef,
+ <<_I1:SkipBef,Int:N/signed,_I2:SkipAft>> = Bin,
+ case make_signed_int(List, N) of
+ Int -> ok;
+ Other ->
+ io:format("Bin = ~p,", [Bin]),
+ io:format("SkipBef = ~p, N = ~p", [SkipBef,N]),
+ io:format("Expected ~p, got ~p", [Int,Other]),
+ ?t:fail()
+ end
+ end,
+ ?line more_dynamic1(Signed, funny_binary(43)),
+
+ % Unsigned little-endian numbers.
+ UnsLittle = fun(Bin, List, SkipBef, N) ->
+ SkipAft = 8*size(Bin) - N - SkipBef,
+ <<_I1:SkipBef,Int:N/little,_I2:SkipAft>> = Bin,
+ Int = make_int(big_to_little(List, N), N, 0)
+ end,
+ ?line more_dynamic1(UnsLittle, funny_binary(44)),
+
+ % Signed little-endian numbers.
+ SignLittle = fun(Bin, List, SkipBef, N) ->
+ SkipAft = 8*size(Bin) - N - SkipBef,
+ <<_I1:SkipBef,Int:N/signed-little,_I2:SkipAft>> = Bin,
+ Little = big_to_little(List, N),
+ Int = make_signed_int(Little, N)
+ end,
+ ?line more_dynamic1(SignLittle, funny_binary(45)),
+
+ ok.
+
+funny_binary(N) ->
+ B0 = erlang:md5([N]),
+ {B1,_B2} = split_binary(B0, size(B0) div 2),
+ B1.
+
+more_dynamic1(Action, Bin) ->
+ BitList = bits_to_list(binary_to_list(Bin), 16#80),
+ more_dynamic2(Action, Bin, BitList, 0).
+
+more_dynamic2(Action, Bin, [_|T]=List, Bef) ->
+ more_dynamic3(Action, Bin, List, Bef, size(Bin)*8),
+ more_dynamic2(Action, Bin, T, Bef+1);
+more_dynamic2(_Action, _Bin, [], _Bef) -> ok.
+
+more_dynamic3(Action, Bin, List, Bef, Aft) when Bef =< Aft ->
+%% io:format("~p, ~p", [Bef,Aft-Bef]),
+ Action(Bin, List, Bef, Aft-Bef),
+ more_dynamic3(Action, Bin, List, Bef, Aft-1);
+more_dynamic3(_, _, _, _, _) -> ok.
+
+big_to_little(List, N) -> big_to_little(List, N, []).
+
+big_to_little([B0,B1,B2,B3,B4,B5,B6,B7|T], N, Acc) when N >= 8 ->
+ big_to_little(T, N-8, [B0,B1,B2,B3,B4,B5,B6,B7|Acc]);
+big_to_little(List, N, Acc) -> lists:sublist(List, 1, N) ++ Acc.
+
+make_signed_int(_List, 0) -> 0;
+make_signed_int([0|_T]=List, N) -> make_int(List, N, 0);
+make_signed_int([1|_T]=List0, N) ->
+ List1 = reversed_sublist(List0, N, []),
+ List2 = two_complement_and_reverse(List1, 1, []),
+ -make_int(List2, length(List2), 0).
+
+reversed_sublist(_List, 0, Acc) -> Acc;
+reversed_sublist([H|T], N, Acc) -> reversed_sublist(T, N-1, [H|Acc]).
+
+two_complement_and_reverse([H|T], Carry, Acc) ->
+ Sum = 1-H+Carry,
+ two_complement_and_reverse(T, Sum div 2, [Sum rem 2|Acc]);
+two_complement_and_reverse([], Carry, Acc) -> [Carry|Acc].
+
+make_int(_List, 0, Acc) -> Acc;
+make_int([H|T], N, Acc) -> make_int(T, N-1, Acc bsl 1 bor H).
+
+bits_to_list([_H|T], 0) -> bits_to_list(T, 16#80);
+bits_to_list([H|_]=List, Mask) ->
+ [case H band Mask of
+ 0 -> 0;
+ _ -> 1
+ end|bits_to_list(List, Mask bsr 1)];
+bits_to_list([], _) -> [].
+
+fun_clause({'EXIT',{function_clause,_}}) -> ok.
+mkbin(L) when list(L) -> list_to_binary(L).
+
+mml(Config) when list(Config) ->
+ ?line single_byte_binary = mml_choose(<<42>>),
+ ?line multi_byte_binary = mml_choose(<<42,43>>).
+
+mml_choose(<<_A:8>>) -> single_byte_binary;
+mml_choose(<<_A:8, _T/binary>>) -> multi_byte_binary.
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-28 17:40:46 +0000