diff options
Diffstat (limited to 'lib/hipe/test/bs_SUITE_data/bs_potpurri.erl')
| -rw-r--r-- | lib/hipe/test/bs_SUITE_data/bs_potpurri.erl | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/lib/hipe/test/bs_SUITE_data/bs_potpurri.erl b/lib/hipe/test/bs_SUITE_data/bs_potpurri.erl new file mode 100644 index 0000000000..8bc4fe5c88 --- /dev/null +++ b/lib/hipe/test/bs_SUITE_data/bs_potpurri.erl @@ -0,0 +1,200 @@ +%%% -*- erlang-indent-level: 2 -*- +%%%------------------------------------------------------------------- +-module(bs_potpurri). + +-export([test/0]). + +test() -> + ok = integer(), + ok = signed_integer(), + ok = dynamic(), + ok = more_dynamic(), + ok = mml(), + ok. + +%% compile(Opts0) -> +%% case proplists:get_bool(core, Opts0) of +%% true -> +%% test:note(?MODULE, "disabling compilation from core - BUG"), +%% Opts = [{core,false}|Opts0]; +%% false -> +%% Opts = Opts0 +%% end, +%% hipe:c(?MODULE, Opts). + +integer() -> + 0 = get_int(mkbin([])), + 0 = get_int(mkbin([0])), + 42 = get_int(mkbin([42])), + 255 = get_int(mkbin([255])), + 256 = get_int(mkbin([1,0])), + 257 = get_int(mkbin([1,1])), + 258 = get_int(mkbin([1,2])), + 258 = get_int(mkbin([1,2])), + 65534 = get_int(mkbin([255,254])), + 16776455 = get_int(mkbin([255,253,7])), + 4245492555 = get_int(mkbin([253,13,19,75])), + L = [200,1,19,128,222,42,97,111,200,1,19,128,222,42,97,111], + ok = cmp128(mkbin(L), uint(L)), + ok = fun_clause(catch get_int(mkbin(lists: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) -> ok; +cmp128(_Bin, _I) -> not_ok. + +signed_integer() -> + {no_match,_} = sint(mkbin([])), + {no_match,_} = sint(mkbin([1,2,3])), + 127 = sint(mkbin([127])), + -1 = sint(mkbin([255])), + -128 = sint(mkbin([128])), + 42 = sint(mkbin([42,255])), + 127 = sint(mkbin([127,255])), + ok. + +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() -> + ok = dynamic(mkbin([255]), 8), + ok = dynamic(mkbin([255,255]), 16), + ok = dynamic(mkbin([255,255,255]), 24), + ok = dynamic(mkbin([255,255,255,255]), 32), + ok. + +dynamic(Bin, S1) when S1 >= 0 -> + S2 = bit_size(Bin) - 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; + <<A1:S1,B2:S2>> -> erlang:error(badmatch, [Bin,S1,S2,A,B,A1,B2]) + end. + +more_dynamic() -> + %% Unsigned big-endian numbers. + Unsigned = fun(Bin, List, SkipBef, N) -> + SkipAft = bit_size(Bin) - N - SkipBef, + <<_I1:SkipBef,Int:N,_I2:SkipAft>> = Bin, + Int = make_int(List, N, 0) + end, + ok = more_dynamic1(Unsigned, funny_binary(42)), + + %% Signed big-endian numbers. + Signed = fun(Bin, List, SkipBef, N) -> + SkipAft = bit_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]), + exit(Other) + end + end, + ok = more_dynamic1(Signed, funny_binary(43)), + + %% Unsigned little-endian numbers. + UnsLittle = fun(Bin, List, SkipBef, N) -> + SkipAft = bit_size(Bin) - N - SkipBef, + <<_I1:SkipBef,Int:N/little,_I2:SkipAft>> = Bin, + Int = make_int(big_to_little(List, N), N, 0) + end, + more_dynamic1(UnsLittle, funny_binary(44)), + + %% Signed little-endian numbers. + SignLittle = fun(Bin, List, SkipBef, N) -> + SkipAft = bit_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, + ok = more_dynamic1(SignLittle, funny_binary(45)), + + ok. + +funny_binary(N) -> + B0 = erlang:md5([N]), + {B1,_B2} = split_binary(B0, byte_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, bit_size(Bin)), + 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|_]=List, N) -> make_int(List, N, 0); +make_signed_int([1|_]=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([_|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 is_list(L) -> list_to_binary(L). + +mml() -> + single_byte_binary = mml_choose(<<42>>), + multi_byte_binary = mml_choose(<<42,43>>), + ok. + +mml_choose(<<_:8>>) -> single_byte_binary; +mml_choose(<<_:8, _T/binary>>) -> multi_byte_binary. |