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Diffstat (limited to 'lib/hipe/test/bs_SUITE_data/bs_match.erl')
| -rw-r--r-- | lib/hipe/test/bs_SUITE_data/bs_match.erl | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/lib/hipe/test/bs_SUITE_data/bs_match.erl b/lib/hipe/test/bs_SUITE_data/bs_match.erl new file mode 100644 index 0000000000..8194d878b8 --- /dev/null +++ b/lib/hipe/test/bs_SUITE_data/bs_match.erl @@ -0,0 +1,175 @@ +%%% -*- erlang-indent-level: 2 -*- +%%%------------------------------------------------------------------- +%%% File : bs_match.erl +%%% Author : Per Gustafsson <[email protected]> +%%% Purpose : Performs simple matching and construction of binaries +%%% TODO : Add binary and float tests +%%% Created : 20 Feb 2004 +%%%------------------------------------------------------------------- +-module(bs_match). + +-export([test/0]). + +test() -> + Funs = [fun test_aligned/0, fun test_unaligned/0, + fun test_zero_tail/0, fun test_integer_matching/0], + lists:foreach(fun (F) -> ok = F() end, Funs). + +%%------------------------------------------------------------------- +%% Test aligned accesses + +test_aligned() -> + 10 = aligned_skip_bits_all(1, <<10,11,12>>), + ok = aligned(). + +aligned_skip_bits_all(N, Bin) -> + <<X:N/integer-unit:8, _/binary>> = Bin, + X. + +aligned() -> + Tail1 = mkbin([]), + {258, Tail1} = al_get_tail_used(mkbin([1,2])), + Tail2 = mkbin(lists:seq(1, 127)), + {35091, Tail2} = al_get_tail_used(mkbin([137,19|Tail2])), + 64896 = al_get_tail_unused(mkbin([253,128])), + 64895 = al_get_tail_unused(mkbin([253,127|lists:seq(42, 255)])), + Tail3 = mkbin(lists:seq(0, 19)), + {0, Tail1} = get_dyn_tail_used(Tail1, 0), + {0, Tail3} = get_dyn_tail_used(mkbin([Tail3]), 0), + {73, Tail3} = get_dyn_tail_used(mkbin([73|Tail3]), 8), + 0 = get_dyn_tail_unused(mkbin([]), 0), + 233 = get_dyn_tail_unused(mkbin([233]), 8), + 23 = get_dyn_tail_unused(mkbin([23,22,2]), 8), + ok. + +mkbin(L) when is_list(L) -> list_to_binary(L). + +al_get_tail_used(<<A:16,T/binary>>) -> {A, T}. + +al_get_tail_unused(<<A:16,_/binary>>) -> A. + +%%------------------------------------------------------------------- +%% Test unaligned accesses + +test_unaligned() -> + 10 = unaligned_skip_bits_all(8, <<10,11,12>>), + ok = unaligned(). + +unaligned_skip_bits_all(N, Bin) -> + <<X:N, _/binary>> = Bin, + X. + +unaligned() -> + {'EXIT', {function_clause,_}} = (catch get_tail_used(mkbin([42]))), + {'EXIT', {{badmatch,_},_}} = (catch get_dyn_tail_used(mkbin([137]), 3)), + {'EXIT', {function_clause,_}} = (catch get_tail_unused(mkbin([42,33]))), + {'EXIT', {{badmatch,_},_}} = (catch get_dyn_tail_unused(mkbin([44]), 7)), + ok. + +get_tail_used(<<A:1, T/binary>>) -> {A, T}. + +get_tail_unused(<<A:15, _/binary>>) -> A. + +get_dyn_tail_used(Bin, Sz) -> + <<A:Sz, T/binary>> = Bin, + {A,T}. + +get_dyn_tail_unused(Bin, Sz) -> + <<A:Sz, _T/binary>> = Bin, + A. + +%%------------------------------------------------------------------- +%% Test zero tail + +test_zero_tail() -> + 42 = zt8(mkbin([42])), + {'EXIT', {function_clause, _}} = (catch zt8(mkbin([1,2]))), + {'EXIT', {function_clause, _}} = (catch zt44(mkbin([1,2]))), + ok. + +zt8(<<A:8>>) -> A. + +zt44(<<_:4,_:4>>) -> ok. + +%%------------------------------------------------------------------- +%% Test integer matching + +test_integer_matching() -> + ok = test_static_integer_matching_1(), + ok = test_static_integer_matching_2(), + ok = test_static_integer_matching_3(), + ok = test_static_integer_matching_4(), + DynFun = fun (N) -> ok = test_dynamic_integer_matching(N) end, + lists:foreach(DynFun, [28, 27, 9, 17, 25, 8, 16, 24, 32]). + +test_static_integer_matching_1() -> + <<0:6, -25:28/integer-signed, 0:6>> = s11(), + <<0:6, -25:28/integer-little-signed, 0:6>> = s12(), + <<0:6, 25:28/integer-little, 0:6>> = s13(), + <<0:6, 25:28, 0:6>> = s14(), + ok. + +s11() -> + <<0:6, -25:28/integer-signed, 0:6>>. +s12() -> + <<0:6, -25:28/integer-little-signed, 0:6>>. +s13() -> + <<0:6, 25:28/integer-little, 0:6>>. +s14() -> + <<0:6, 25:28, 0:6>>. + +test_static_integer_matching_2() -> + <<0:6, -25:20/integer-signed, 0:6>> = s21(), + <<0:6, -25:20/integer-little-signed, 0:6>> = s22(), + <<0:6, 25:20/integer-little, 0:6>> = s23(), + <<0:6, 25:20, 0:6>> = s24(), + ok. + +s21() -> + <<0:6, -25:20/integer-signed, 0:6>>. +s22() -> + <<0:6, -25:20/integer-little-signed, 0:6>>. +s23() -> + <<0:6, 25:20/integer-little, 0:6>>. +s24() -> + <<0:6, 25:20, 0:6>>. + +test_static_integer_matching_3() -> + <<0:6, -25:12/integer-signed, 0:6>> = s31(), + <<0:6, -25:12/integer-little-signed, 0:6>> = s32(), + <<0:6, 25:12/integer-little, 0:6>> = s33(), + <<0:6, 25:12, 0:6>> = s34(), + ok. + +s31() -> + <<0:6, -25:12/integer-signed, 0:6>>. +s32() -> + <<0:6, -25:12/integer-little-signed, 0:6>>. +s33() -> + <<0:6, 25:12/integer-little, 0:6>>. +s34() -> + <<0:6, 25:12, 0:6>>. + +test_static_integer_matching_4() -> + <<0:6, -3:4/integer-signed, 0:6>> = s41(), + <<0:6, -3:4/integer-little-signed, 0:6>> = s42(), + <<0:6, 7:4/integer-little, 0:6>> = s43(), + <<0:6, 7:4, 0:6>> = s44(), + ok. + +s41() -> + <<0:6, -3:4/integer-signed, 0:6>>. +s42() -> + <<0:6, -3:4/integer-little-signed, 0:6>>. +s43() -> + <<0:6, 7:4/integer-little, 0:6>>. +s44() -> + <<0:6, 7:4, 0:6>>. + +test_dynamic_integer_matching(N) -> + S = 32 - N, + <<-12:N/integer-signed, 0:S>> = <<-12:N/integer-signed, 0:S>>, + <<-12:N/integer-little-signed, 0:S>> = <<-12:N/integer-little-signed, 0:S>>, + <<12:N/integer, 0:S>> = <<12:N/integer, 0:S>>, + <<12:N/integer-little, 0:S>> = <<12:N/integer-little, 0:S>>, + ok. |