1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
|
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2000-2016. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%%
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%%
%% %CopyrightEnd%
%%
-module(bs_match_bin_SUITE).
-author('bjorn@erix.ericsson.se').
-export([all/0, suite/0,groups/0,init_per_group/2,end_per_group/2,
init_per_testcase/2,end_per_testcase/2,
init_per_suite/1,end_per_suite/1,
byte_split_binary/1,bit_split_binary/1,match_huge_bin/1]).
-include_lib("common_test/include/ct.hrl").
suite() ->
[{ct_hooks,[ts_install_cth]},
{timetrap,{minutes,1}}].
all() ->
[byte_split_binary, bit_split_binary, match_huge_bin].
groups() ->
[].
init_per_group(_GroupName, Config) ->
Config.
end_per_group(_GroupName, Config) ->
Config.
init_per_testcase(_Case, Config) ->
test_lib:interpret(?MODULE),
Config.
end_per_testcase(_Case, _Config) ->
ok.
init_per_suite(Config) when is_list(Config) ->
test_lib:interpret(?MODULE),
true = lists:member(?MODULE, int:interpreted()),
Config.
end_per_suite(Config) when is_list(Config) ->
ok.
%% Tries to split a binary at all byte-aligned positions.
byte_split_binary(Config) when is_list(Config) ->
L = lists:seq(0, 57),
B = mkbin(L),
byte_split(L, B, size(B)),
Unaligned = make_unaligned_sub_binary(B),
byte_split(L, Unaligned, size(Unaligned)).
byte_split(L, B, Pos) when Pos >= 0 ->
Sz1 = Pos,
Sz2 = size(B) - Pos,
<<B1:Sz1/binary,B2:Sz2/binary>> = B,
B1 = list_to_binary(lists:sublist(L, 1, Pos)),
B2 = list_to_binary(lists:nthtail(Pos, L)),
byte_split(L, B, Pos-1);
byte_split(_, _, _) -> ok.
%% Tries to split a binary at all positions.
bit_split_binary(Config) when is_list(Config) ->
Fun = fun(Bin, List, SkipBef, N) ->
SkipAft = 8*size(Bin) - N - SkipBef,
%%io:format("~p, ~p, ~p", [SkipBef,N,SkipAft]),
<<_:SkipBef,OutBin:N/binary-unit:1,_:SkipAft>> = Bin,
OutBin = make_bin_from_list(List, N)
end,
bit_split_binary1(Fun, erlang:md5(<<1,2,3>>)),
bit_split_binary1(Fun,
make_unaligned_sub_binary(erlang:md5(<<1,2,3>>))),
ok.
bit_split_binary1(Action, Bin) ->
BitList = bits_to_list(binary_to_list(Bin), 16#80),
bit_split_binary2(Action, Bin, BitList, 0).
bit_split_binary2(Action, Bin, [_|T]=List, Bef) ->
bit_split_binary3(Action, Bin, List, Bef, size(Bin)*8),
bit_split_binary2(Action, Bin, T, Bef+1);
bit_split_binary2(_, _, [], _) -> ok.
bit_split_binary3(Action, Bin, List, Bef, Aft) when Bef =< Aft ->
Action(Bin, List, Bef, (Aft-Bef) div 8 * 8),
bit_split_binary3(Action, Bin, List, Bef, Aft-8);
bit_split_binary3(_, _, _, _, _) -> ok.
make_bin_from_list(_, 0) -> mkbin([]);
make_bin_from_list(List, N) ->
list_to_binary([make_int(List, 8, 0),
make_bin_from_list(lists:nthtail(8, List), N-8)]).
make_int(_, 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([], _) -> [].
mkbin(L) when is_list(L) -> list_to_binary(L).
make_unaligned_sub_binary(Bin0) ->
Bin1 = <<0:3,Bin0/binary,31:5>>,
Sz = size(Bin0),
<<0:3,Bin:Sz/binary,31:5>> = id(Bin1),
Bin.
id(I) -> I.
match_huge_bin(Config) when is_list(Config) ->
Bin = <<0:(1 bsl 27),13:8>>,
skip_huge_bin_1(1 bsl 27, Bin),
16777216 = match_huge_bin_1(1 bsl 27, Bin),
%% Test overflowing the size of a binary field.
nomatch = overflow_huge_bin_skip_32(Bin),
nomatch = overflow_huge_bin_32(Bin),
nomatch = overflow_huge_bin_skip_64(Bin),
nomatch = overflow_huge_bin_64(Bin),
%% Size in variable
ok = overflow_huge_bin(Bin, lists:seq(25, 32)++lists:seq(50, 64)),
ok = overflow_huge_bin_unit128(Bin, lists:seq(25, 32)++lists:seq(50, 64)),
ok.
overflow_huge_bin(Bin, [Sz0|Sizes]) ->
Sz = id(1 bsl Sz0),
case Bin of
<<_:Sz/binary-unit:8,0,_/binary>> ->
{error,Sz};
_ ->
case Bin of
<<NewBin:Sz/binary-unit:8,0,_/binary>> ->
{error,Sz,size(NewBin)};
_ ->
overflow_huge_bin(Bin, Sizes)
end
end;
overflow_huge_bin(_, []) -> ok.
overflow_huge_bin_unit128(Bin, [Sz0|Sizes]) ->
Sz = id(1 bsl Sz0),
case Bin of
<<_:Sz/binary-unit:128,0,_/binary>> ->
{error,Sz};
_ ->
case Bin of
<<NewBin:Sz/binary-unit:128,0,_/binary>> ->
{error,Sz,size(NewBin)};
_ ->
overflow_huge_bin_unit128(Bin, Sizes)
end
end;
overflow_huge_bin_unit128(_, []) -> ok.
skip_huge_bin_1(I, Bin) ->
<<_:I/binary-unit:1,13>> = Bin,
ok.
match_huge_bin_1(I, Bin) ->
case Bin of
<<Val:I/binary-unit:1,13>> -> size(Val);
_ -> nomatch
end.
overflow_huge_bin_skip_32(<<_:4294967296/binary,0,_/binary>>) -> 1; % 1 bsl 32
overflow_huge_bin_skip_32(<<_:33554432/binary-unit:128,0,_/binary>>) -> 2; % 1 bsl 25
overflow_huge_bin_skip_32(<<_:67108864/binary-unit:64,0,_/binary>>) -> 3; % 1 bsl 26
overflow_huge_bin_skip_32(<<_:134217728/binary-unit:32,0,_/binary>>) -> 4; % 1 bsl 27
overflow_huge_bin_skip_32(<<_:268435456/binary-unit:16,0,_/binary>>) -> 5; % 1 bsl 28
overflow_huge_bin_skip_32(<<_:536870912/binary-unit:8,0,_/binary>>) -> 6; % 1 bsl 29
overflow_huge_bin_skip_32(<<_:1073741824/binary-unit:8,0,_/binary>>) -> 7; % 1 bsl 30
overflow_huge_bin_skip_32(<<_:2147483648/binary-unit:8,0,_/binary>>) -> 8; % 1 bsl 31
overflow_huge_bin_skip_32(_) -> nomatch.
overflow_huge_bin_32(<<Bin:4294967296/binary,_/binary>>) -> {1,Bin}; % 1 bsl 32
overflow_huge_bin_32(<<Bin:33554432/binary-unit:128,0,_/binary>>) -> {2,Bin}; % 1 bsl 25
overflow_huge_bin_32(<<Bin:67108864/binary-unit:128,0,_/binary>>) -> {3,Bin}; % 1 bsl 26
overflow_huge_bin_32(<<Bin:134217728/binary-unit:128,0,_/binary>>) -> {4,Bin}; % 1 bsl 27
overflow_huge_bin_32(<<Bin:268435456/binary-unit:128,0,_/binary>>) -> {5,Bin}; % 1 bsl 28
overflow_huge_bin_32(<<Bin:536870912/binary-unit:128,0,_/binary>>) -> {6,Bin}; % 1 bsl 29
overflow_huge_bin_32(<<Bin:1073741824/binary-unit:128,0,_/binary>>) -> {7,Bin}; % 1 bsl 30
overflow_huge_bin_32(<<Bin:2147483648/binary-unit:128,0,_/binary>>) -> {8,Bin}; % 1 bsl 31
overflow_huge_bin_32(_) -> nomatch.
overflow_huge_bin_skip_64(<<_:18446744073709551616/binary,0,_/binary>>) -> 1; % 1 bsl 64
overflow_huge_bin_skip_64(<<_:144115188075855872/binary-unit:128,0,_/binary>>) -> 2; % 1 bsl 57
overflow_huge_bin_skip_64(<<_:288230376151711744/binary-unit:64,0,_/binary>>) -> 3; % 1 bsl 58
overflow_huge_bin_skip_64(<<_:576460752303423488/binary-unit:32,0,_/binary>>) -> 4; % 1 bsl 59
overflow_huge_bin_skip_64(<<_:1152921504606846976/binary-unit:16,0,_/binary>>) -> 5; % 1 bsl 60
overflow_huge_bin_skip_64(<<_:2305843009213693952/binary-unit:8,0,_/binary>>) -> 6; % 1 bsl 61
overflow_huge_bin_skip_64(<<_:4611686018427387904/binary-unit:8,0,_/binary>>) -> 7; % 1 bsl 62
overflow_huge_bin_skip_64(<<_:9223372036854775808/binary-unit:8,_/binary>>) -> 8; % 1 bsl 63
overflow_huge_bin_skip_64(_) -> nomatch.
overflow_huge_bin_64(<<Bin:18446744073709551616/binary,_/binary>>) -> {1,Bin}; % 1 bsl 64
overflow_huge_bin_64(<<Bin:144115188075855872/binary-unit:128,0,_/binary>>) -> {2,Bin}; % 1 bsl 57
overflow_huge_bin_64(<<Bin:288230376151711744/binary-unit:128,0,_/binary>>) -> {3,Bin}; % 1 bsl 58
overflow_huge_bin_64(<<Bin:576460752303423488/binary-unit:128,0,_/binary>>) -> {4,Bin}; % 1 bsl 59
overflow_huge_bin_64(<<Bin:1152921504606846976/binary-unit:128,0,_/binary>>) -> {5,Bin}; % 1 bsl 60
overflow_huge_bin_64(<<Bin:2305843009213693952/binary-unit:128,0,_/binary>>) -> {6,Bin}; % 1 bsl 61
overflow_huge_bin_64(<<Bin:4611686018427387904/binary-unit:128,0,_/binary>>) -> {7,Bin}; % 1 bsl 62
overflow_huge_bin_64(<<Bin:9223372036854775808/binary-unit:128,0,_/binary>>) -> {8,Bin}; % 1 bsl 63
overflow_huge_bin_64(_) -> nomatch.
|
