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Diffstat (limited to 'erts/emulator/test/bs_match_int_SUITE.erl')
| -rw-r--r-- | erts/emulator/test/bs_match_int_SUITE.erl | 331 |
1 files changed, 331 insertions, 0 deletions
diff --git a/erts/emulator/test/bs_match_int_SUITE.erl b/erts/emulator/test/bs_match_int_SUITE.erl new file mode 100644 index 0000000000..99dee7c7bc --- /dev/null +++ b/erts/emulator/test/bs_match_int_SUITE.erl @@ -0,0 +1,331 @@ +%% +%% %CopyrightBegin% +%% +%% Copyright Ericsson AB 1999-2009. 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(bs_match_int_SUITE). + +-export([all/1,integer/1,signed_integer/1,dynamic/1,more_dynamic/1,mml/1, + match_huge_int/1,bignum/1,unaligned_32_bit/1]). + +-include("test_server.hrl"). + +-import(lists, [seq/2]). + +all(suite) -> + [integer,signed_integer,dynamic,more_dynamic,mml,match_huge_int,bignum, + unaligned_32_bit]. + +integer(Config) when is_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 4294967294 = get_int(mkbin([255,255,255,254])), + ?line 4294967295 = get_int(mkbin([255,255,255,255])), + ?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(Bin) -> + I = get_int1(Bin), + get_int(Bin, I). + +get_int(Bin0, I) when size(Bin0) < 4 -> + Bin = <<0,Bin0/binary>>, + I = get_int1(Bin), + get_int(Bin, I); +get_int(_, I) -> I. + +get_int1(<<I:0>>) -> I; +get_int1(<<I:8>>) -> I; +get_int1(<<I:16>>) -> I; +get_int1(<<I:24>>) -> I; +get_int1(<<I:32>>) -> I. + +cmp128(<<I:128>>, I) -> equal; +cmp128(_, _) -> not_equal. + +signed_integer(Config) when is_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 is_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(_, _) -> 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 is_list(Config) -> + + % Unsigned big-endian numbers. + Unsigned = fun(Bin, List, SkipBef, N) -> + SkipAft = 8*size(Bin) - N - SkipBef, + <<_:SkipBef,Int:N,_:SkipAft>> = Bin, + Int = make_int(List, N, 0) + end, + ?line more_dynamic1(Unsigned, erlang:md5(mkbin([42]))), + + %% Signed big-endian numbers. + Signed = fun(Bin, List, SkipBef, N) -> + SkipAft = 8*size(Bin) - N - SkipBef, + <<_:SkipBef,Int:N/signed,_: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, erlang:md5(mkbin([43]))), + + %% Unsigned little-endian numbers. + UnsLittle = fun(Bin, List, SkipBef, N) -> + SkipAft = 8*size(Bin) - N - SkipBef, + <<_:SkipBef,Int:N/little,_:SkipAft>> = Bin, + Int = make_int(big_to_little(List, N), N, 0) + end, + ?line more_dynamic1(UnsLittle, erlang:md5(mkbin([44]))), + + %% Signed little-endian numbers. + SignLittle = fun(Bin, List, SkipBef, N) -> + SkipAft = 8*size(Bin) - N - SkipBef, + <<_:SkipBef,Int:N/signed-little,_:SkipAft>> = Bin, + Little = big_to_little(List, N), + Int = make_signed_int(Little, N) + end, + ?line more_dynamic1(SignLittle, erlang:md5(mkbin([45]))), + + ok. + +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(_, _, [], _) -> 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(Config) when is_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. + +match_huge_int(Config) when is_list(Config) -> + Sz = 1 bsl 27, + ?line Bin = <<0:Sz,13:8>>, + ?line skip_huge_int_1(Sz, Bin), + ?line 0 = match_huge_int_1(Sz, Bin), + + %% Test overflowing the size of an integer field. + ?line nomatch = overflow_huge_int_skip_32(Bin), + case erlang:system_info(wordsize) of + 4 -> + ?line nomatch = overflow_huge_int_32(Bin); + 8 -> + %% An attempt will be made to allocate heap space for + %% the bignum (which will probably fail); only if the + %% allocation succeds will the matching fail because + %% the binary is too small. + ok + end, + ?line nomatch = overflow_huge_int_skip_64(Bin), + ?line nomatch = overflow_huge_int_64(Bin), + + %% Test overflowing the size of an integer field using variables as sizes. + ?line Sizes = case erlang:system_info(wordsize) of + 4 -> lists:seq(25, 32); + 8 -> [] + end ++ lists:seq(50, 64), + ?line ok = overflow_huge_int_unit128(Bin, Sizes), + + ok. + +overflow_huge_int_unit128(Bin, [Sz0|Sizes]) -> + Sz = id(1 bsl Sz0), + case Bin of + <<_:Sz/unit:128,0,_/binary>> -> + {error,Sz}; + _ -> + case Bin of + <<Var:Sz/unit:128,0,_/binary>> -> + {error,Sz,Var}; + _ -> + overflow_huge_int_unit128(Bin, Sizes) + end + end; +overflow_huge_int_unit128(_, []) -> ok. + +match_huge_int_1(I, Bin) -> + <<Int:I,13>> = Bin, + Int. + +skip_huge_int_1(I, Bin) -> + <<_:I,13>> = Bin. + +overflow_huge_int_skip_32(<<_:4294967296,0,_/binary>>) -> 1; % 1 bsl 32 +overflow_huge_int_skip_32(<<_:33554432/unit:128,0,_/binary>>) -> 2; % 1 bsl 25 +overflow_huge_int_skip_32(<<_:67108864/unit:64,0,_/binary>>) -> 3; % 1 bsl 26 +overflow_huge_int_skip_32(<<_:134217728/unit:32,0,_/binary>>) -> 4; % 1 bsl 27 +overflow_huge_int_skip_32(<<_:268435456/unit:16,0,_/binary>>) -> 5; % 1 bsl 28 +overflow_huge_int_skip_32(<<_:536870912/unit:8,0,_/binary>>) -> 6; % 1 bsl 29 +overflow_huge_int_skip_32(<<_:1073741824/unit:8,0,_/binary>>) -> 7; % 1 bsl 30 +overflow_huge_int_skip_32(<<_:2147483648/unit:8,0,_/binary>>) -> 8; % 1 bsl 31 +overflow_huge_int_skip_32(_) -> nomatch. + +overflow_huge_int_32(<<Int:4294967296,_/binary>>) -> {1,Int}; % 1 bsl 32 +overflow_huge_int_32(<<Int:33554432/unit:128,0,_/binary>>) -> {2,Int}; % 1 bsl 25 +overflow_huge_int_32(<<Int:67108864/unit:128,0,_/binary>>) -> {3,Int}; % 1 bsl 26 +overflow_huge_int_32(<<Int:134217728/unit:128,0,_/binary>>) -> {4,Int}; % 1 bsl 27 +overflow_huge_int_32(<<Int:268435456/unit:128,0,_/binary>>) -> {5,Int}; % 1 bsl 28 +overflow_huge_int_32(<<Int:536870912/unit:128,0,_/binary>>) -> {6,Int}; % 1 bsl 29 +overflow_huge_int_32(<<Int:1073741824/unit:128,0,_/binary>>) -> {7,Int}; % 1 bsl 30 +overflow_huge_int_32(<<Int:2147483648/unit:128,0,_/binary>>) -> {8,Int}; % 1 bsl 31 +overflow_huge_int_32(_) -> nomatch. + +overflow_huge_int_skip_64(<<_:18446744073709551616,_/binary>>) -> 1; % 1 bsl 64 +overflow_huge_int_skip_64(<<_:144115188075855872/unit:128,0,_/binary>>) -> 2; % 1 bsl 57 +overflow_huge_int_skip_64(<<_:288230376151711744/unit:64,0,_/binary>>) -> 3; % 1 bsl 58 +overflow_huge_int_skip_64(<<_:576460752303423488/unit:32,0,_/binary>>) -> 4; % 1 bsl 59 +overflow_huge_int_skip_64(<<_:1152921504606846976/unit:16,0,_/binary>>) -> 5; % 1 bsl 60 +overflow_huge_int_skip_64(<<_:2305843009213693952/unit:8,0,_/binary>>) -> 6; % 1 bsl 61 +overflow_huge_int_skip_64(<<_:4611686018427387904/unit:8,0,_/binary>>) -> 7; % 1 bsl 62 +overflow_huge_int_skip_64(<<_:9223372036854775808/unit:8,0,_/binary>>) -> 8; % 1 bsl 63 +overflow_huge_int_skip_64(_) -> nomatch. + +overflow_huge_int_64(<<Int:18446744073709551616,_/binary>>) -> {1,Int}; % 1 bsl 64 +overflow_huge_int_64(<<Int:144115188075855872/unit:128,0,_/binary>>) -> {2,Int}; % 1 bsl 57 +overflow_huge_int_64(<<Int:288230376151711744/unit:128,0,_/binary>>) -> {3,Int}; % 1 bsl 58 +overflow_huge_int_64(<<Int:576460752303423488/unit:128,0,_/binary>>) -> {4,Int}; % 1 bsl 59 +overflow_huge_int_64(<<Int:1152921504606846976/unit:128,0,_/binary>>) -> {5,Int}; % 1 bsl 60 +overflow_huge_int_64(<<Int:2305843009213693952/unit:128,0,_/binary>>) -> {6,Int}; % 1 bsl 61 +overflow_huge_int_64(<<Int:4611686018427387904/unit:128,0,_/binary>>) -> {7,Int}; % 1 bsl 62 +overflow_huge_int_64(<<Int:9223372036854775808/unit:128,0,_/binary>>) -> {8,Int}; % 1 bsl 63 +overflow_huge_int_64(_) -> nomatch. + +bignum(Config) when is_list(Config) -> + ?line Bin = id(<<42,0:1024/unit:8,43>>), + ?line <<42:1025/little-integer-unit:8,_:8>> = Bin, + ?line <<_:8,43:1025/integer-unit:8>> = Bin, + + ?line BignumBin = id(<<0:512/unit:8,258254417031933722623:9/unit:8>>), + ?line <<258254417031933722623:(512+9)/unit:8>> = BignumBin, + erlang:garbage_collect(), %Search for holes in debug-build. + ok. + +unaligned_32_bit(Config) when is_list(Config) -> + %% There used to be a risk for heap overflow (fixed in R11B-5). + ?line L = unaligned_32_bit_1(<<-1:(64*1024)>>), + ?line unaligned_32_bit_verify(L, 1638). + +unaligned_32_bit_1(<<1:1,U:32,_:7,T/binary>>) -> + [U|unaligned_32_bit_1(T)]; +unaligned_32_bit_1(_) -> + []. + +unaligned_32_bit_verify([], 0) -> ok; +unaligned_32_bit_verify([4294967295|T], N) when N > 0 -> + unaligned_32_bit_verify(T, N-1). + +id(I) -> I. |