%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2008-2017. 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%
%%
%%
%% Generate random iolists to be used by crypto_SUITE.erl
%%
-module(random_unicode_list).
-export([run/3, run/4, standard_seed/0, compare/4,
random_unicode_list/2]).
run(I,F1,F2) ->
run(I,F1,F2,utf8).
run(Iter,Fun1,Fun2,Enc) ->
standard_seed(),
compare(Iter,Fun1,Fun2,Enc).
int_to_utf8(I) when I =< 16#7F ->
<<I>>;
int_to_utf8(I) when I =< 16#7FF ->
B2 = I,
B1 = (I bsr 6),
<<1:1,1:1,0:1,B1:5,1:1,0:1,B2:6>>;
int_to_utf8(I) when I =< 16#FFFF ->
B3 = I,
B2 = (I bsr 6),
B1 = (I bsr 12),
<<1:1,1:1,1:1,0:1,B1:4,1:1,0:1,B2:6,1:1,0:1,B3:6>>;
int_to_utf8(I) when I =< 16#3FFFFF ->
B4 = I,
B3 = (I bsr 6),
B2 = (I bsr 12),
B1 = (I bsr 18),
<<1:1,1:1,1:1,1:1,0:1,B1:3,1:1,0:1,B2:6,1:1,0:1,B3:6,1:1,0:1,B4:6>>;
int_to_utf8(I) when I =< 16#3FFFFFF ->
B5 = I,
B4 = (I bsr 6),
B3 = (I bsr 12),
B2 = (I bsr 18),
B1 = (I bsr 24),
<<1:1,1:1,1:1,1:1,1:1,0:1,B1:2,1:1,0:1,B2:6,1:1,0:1,B3:6,1:1,0:1,B4:6,
1:1,0:1,B5:6>>.
int_to_utf16_big(I) when I < 16#10000 ->
<<I:16/big>>;
int_to_utf16_big(I) ->
I2 = I - 16#10000,
B1 = 16#D800 bor (I2 bsr 10),
B2 = 16#DC00 bor (I2 band 16#3FF),
<<B1:16/big,B2:16/big>>.
int_to_utf16_little(I) when I < 16#10000 ->
<<I:16/little>>;
int_to_utf16_little(I) ->
I2 = I - 16#10000,
B1 = 16#D800 bor (I2 bsr 10),
B2 = 16#DC00 bor (I2 band 16#3FF),
<<B1:16/little,B2:16/little>>.
int_to_utf32_big(I) ->
<<I:32/big>>.
int_to_utf32_little(I) ->
<<I:32/little>>.
id(I) -> I.
random_char() ->
case rand:uniform(16#10FFFF+1) - 1 of
X when X >= 16#D800,
X =< 16#DFFF ->
random_char();
Y ->
Y
end.
random_list(0,Acc) ->
Acc;
random_list(N,Acc) ->
random_list(N-1,[random_char() | Acc]).
int_to(utf8,X) ->
int_to_utf8(X);
int_to({utf16,big},X) ->
int_to_utf16_big(X);
int_to({utf16,little},X) ->
int_to_utf16_little(X);
int_to({utf32,big},X) ->
int_to_utf32_big(X);
int_to({utf32,little},X) ->
int_to_utf32_little(X).
random_binary(N,Enc) ->
L = random_list(N,[]),
B = iolist_to_binary(lists:map(fun(X) ->
int_to(Enc,X)
end,
L)),
case {rand:uniform(3),size(B)} of
{2,M} when M > 1 ->
B2 = id(<<1:3,B/binary,1:5>>),
<<_:3,C:M/binary,_:5>> = B2,
C;
{3,M} when M > 1 ->
X = rand:uniform(M+1)-1,
<<B1:X/binary,B2/binary>> = B,
[B1,B2];
_ ->
B
end.
random_list(N) ->
random_list(N,[]).
front() ->
case rand:uniform(10) of
10 ->
false;
_ ->
true
end.
any_type() ->
case rand:uniform(10) of
1 ->
list;
2 ->
binary;
3 ->
iolist;
_ ->
char
end.
tail_type() ->
case rand:uniform(5) of
1 ->
list;
2 ->
iolist;
_ ->
binary
end.
random_length(N) ->
UpperLimit = 255,
case N of
M when M > UpperLimit ->
rand:uniform(UpperLimit+1) - 1;
_ ->
rand:uniform(N+1) - 1
end.
random_unicode_list(0,Acc,_Enc) ->
Acc;
random_unicode_list(N,Acc,Enc) ->
case front() of
true ->
case any_type() of
list ->
X = random_length(N),
L = random_list(X),
random_unicode_list(N-X,[L|Acc],Enc);
binary ->
X = random_length(N),
B = random_binary(X,Enc),
random_unicode_list(N-X,[B|Acc],Enc);
iolist ->
X = random_length(N),
B = random_unicode_list(X,Enc),
random_unicode_list(N-X,[B|Acc],Enc);
char ->
C = random_char(),
random_unicode_list(N-1,[C|Acc],Enc)
end;
false ->
case tail_type() of
list ->
X = random_length(N),
L = random_list(X),
random_unicode_list(N-X,[Acc|L],Enc);
binary ->
X = random_length(N),
B = random_binary(X,Enc),
random_unicode_list(N-X,[Acc|B],Enc);
iolist ->
X = random_length(N),
B = random_unicode_list(X,Enc),
random_unicode_list(N-X,[Acc|B],Enc)
end
end.
random_unicode_list(N,Enc) ->
random_unicode_list(N,[],Enc).
standard_seed() ->
rand:seed(exsplus, {1201,855653,380975}).
do_comp(List,F1,F2) ->
X = F1(List),
Y = F2(List),
case X =:= Y of
false ->
exit({not_matching,List,X,Y});
_ ->
true
end.
compare(0,Fun1,Fun2,_Enc) ->
do_comp(<<>>,Fun1,Fun2),
do_comp([],Fun1,Fun2),
do_comp([[]|<<>>],Fun1,Fun2),
do_comp([<<>>,[]|<<>>],Fun1,Fun2),
true;
compare(N,Fun1,Fun2,Enc) ->
L = random_unicode_list(N,Enc),
do_comp(L,Fun1,Fun2),
compare(N-1,Fun1,Fun2,Enc).
