diff options
Diffstat (limited to 'lib/hipe/test/bs_SUITE_data/bs_bits.erl')
-rw-r--r-- | lib/hipe/test/bs_SUITE_data/bs_bits.erl | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/lib/hipe/test/bs_SUITE_data/bs_bits.erl b/lib/hipe/test/bs_SUITE_data/bs_bits.erl new file mode 100644 index 0000000000..ef9a6bb137 --- /dev/null +++ b/lib/hipe/test/bs_SUITE_data/bs_bits.erl @@ -0,0 +1,150 @@ +%%% -*- erlang-indent-level: 2 -*- +%%%------------------------------------------------------------------- +%%% File : bs_bits.erl +%%% Author : Per Gustafsson <[email protected]> +%%% Purpose : Tests for bit stream operations including matching, +%%% construction, binary_to_list and list_to_binary +%%% Created : 6 Sep 2006 +%%%------------------------------------------------------------------- +-module(bs_bits). + +-export([test/0]). + +test() -> + <<1:100>> = <<1:100>>, + ok = match(7), + ok = match(9), + ok = match1(15), + ok = match1(31), + ok = horrid_match(), + ok = test_bitstr(), + ok = test_is_bitstr(<<1:1>>,<<8>>), + ok = test_is_binary(<<1:1>>,<<8>>), + ok = test_bitsize(), + ok = asymmetric_tests(), + ok = big_asymmetric_tests(), + ok = bitstr_to_and_from_list(), + ok = big_bitstr_to_and_from_list(), + ok = send_and_receive(), + ok = send_and_receive_alot(), + ok. + +match(N) -> + <<0:N>> = <<0:N>>, + ok. + +match1(N) -> + <<42:N/little>> = <<42:N/little>>, + ok. + +test_is_bitstr(Bitstr, Binary) -> + true = is_bitstring(Bitstr), + true = is_bitstring(Binary), + ok = if is_bitstring(Bitstr) -> ok end, + ok = if is_bitstring(Binary) -> ok end. + +test_is_binary(Bitstr, Binary) -> + false = is_binary(Bitstr), + true = is_binary(Binary), + ok = if is_binary(Bitstr) -> not_ok; true -> ok end, + ok = if is_binary(Binary) -> ok end. + +test_bitsize() -> + 101 = erlang:bit_size(<<1:101>>), + 1001 = erlang:bit_size(<<1:1001>>), + 80 = erlang:bit_size(<<1:80>>), + 800 = erlang:bit_size(<<1:800>>), + Bin = <<0:16#1000000>>, + BigBin = list_to_bitstring([Bin||_ <- lists:seq(1,16#10)]++[<<1:1>>]), + 16#10000001 = bit_size(BigBin), + %% Only run these on computers with lots of memory + %% HugeBin = list_to_bitstring([BigBin||_ <- lists:seq(1,16#10)]++[<<1:1>>]), + %% 16#100000011 = bit_size(HugeBin), + 0 = erlang:bit_size(<<>>), + ok. + +horrid_match() -> + <<1:4,B:24/bitstring>> = <<1:4,42:24/little>>, + <<42:24/little>> = B, + ok. + +test_bitstr() -> + <<1:7,B/bitstring>> = <<1:7,<<1:1,6>>/bitstring>>, + <<1:1,6>> = B, + B = <<1:1,6>>, + ok. + +asymmetric_tests() -> + <<1:12>> = <<0,1:4>>, + <<0,1:4>> = <<1:12>>, + <<1:1,X/bitstring>> = <<128,255,0,0:2>>, + <<1,254,0,0:1>> = X, + X = <<1,254,0,0:1>>, + <<1:1,X1:25/bitstring>> = <<128,255,0,0:2>>, + <<1,254,0,0:1>> = X1, + X1 = <<1,254,0,0:1>>, + ok. + +big_asymmetric_tests() -> + <<1:875,1:12>> = <<1:875,0,1:4>>, + <<1:875,0,1:4>> = <<1:875,1:12>>, + <<1:1,X/bitstring>> = <<128,255,0,0:2,1:875>>, + <<1,254,0,0:1,1:875>> = X, + X = <<1,254,0,0:1,1:875>>, + <<1:1,X1:900/bitstring>> = <<128,255,0,0:2,1:875>>, + <<1,254,0,0:1,1:875>> = X1, + X1 = <<1,254,0,0:1,1:875>>, + ok. + +bitstr_to_and_from_list() -> + <<1:7>> = list_to_bitstring(bitstring_to_list(<<1:7>>)), + <<1,2,3,4,1:1>> = list_to_bitstring(bitstring_to_list(<<1,2,3,4,1:1>>)), + [1,2,3,4,<<1:1>>] = bitstring_to_list(<<1,2,3,4,1:1>>), + <<1:1,1,2,3,4>> = list_to_bitstring([<<1:1>>,1,2,3,4]), + [128,129,1,130,<<0:1>>] = bitstring_to_list(<<1:1,1,2,3,4>>), + ok. + +big_bitstr_to_and_from_list() -> + <<1:800,2,3,4,1:1>> = list_to_bitstring(bitstring_to_list(<<1:800,2,3,4,1:1>>)), + [1,2,3,4|_Rest1] = bitstring_to_list(<<1,2,3,4,1:800,1:1>>), + <<1:801,1,2,3,4>> = list_to_bitstring([<<1:801>>,1,2,3,4]), + ok. + +send_and_receive() -> + Bin = <<1,2:7>>, + Pid = spawn(fun() -> receiver(Bin) end), + Pid ! {self(),<<1:7,8:5,Bin/bitstring>>}, + receive + ok -> + ok + end. + +receiver(Bin) -> + receive + {Pid,<<1:7,8:5,Bin/bitstring>>} -> + Pid ! ok + end. + +send_and_receive_alot() -> + Bin = <<1:1000001>>, + Pid = spawn(fun() -> receiver_alot(Bin) end), + send_alot(100,Bin,Pid). + +send_alot(N,Bin,Pid) when N > 0 -> + Pid ! {self(),<<1:7,8:5,Bin/bitstring>>}, + receive + ok -> + ok + end, + send_alot(N-1,Bin,Pid); +send_alot(0,_Bin,Pid) -> + Pid ! no_more, + ok. + +receiver_alot(Bin) -> + receive + {Pid,<<1:7,8:5,Bin/bitstring>>} -> + Pid ! ok; + no_more -> ok + end, + receiver_alot(Bin). |