| // Copyright 2019 Google LLC |
| // |
| // 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 |
| // |
| // https://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. |
| |
| // Tests for generated code for "bits" types, using bits.emb. |
| #include <stdint.h> |
| |
| #include <vector> |
| |
| #include "gtest/gtest.h" |
| #include "public/emboss_cpp_util.h" |
| #include "testdata/bits.emb.h" |
| |
| namespace emboss { |
| namespace test { |
| namespace { |
| |
| TEST(Bits, OneByteView) { |
| ::std::uint8_t data[] = {0x2b}; |
| auto one_byte = GenericOneByteView<support::BitBlock< |
| support::LittleEndianByteOrderer<support::ReadWriteContiguousBuffer>, 8>>{ |
| support::BitBlock< |
| support::LittleEndianByteOrderer<support::ReadWriteContiguousBuffer>, |
| 8>{support::ReadWriteContiguousBuffer{data, sizeof data}}}; |
| EXPECT_EQ(0xa, one_byte.mid_nibble().Read()); |
| EXPECT_EQ(0, one_byte.high_bit().Read()); |
| EXPECT_EQ(1, one_byte.low_bit().Read()); |
| one_byte.less_high_bit().Write(1); |
| EXPECT_EQ(0x6b, data[0]); |
| one_byte.less_low_bit().Write(0); |
| EXPECT_EQ(0x69, data[0]); |
| one_byte.mid_nibble().Write(5); |
| EXPECT_EQ(0x55, data[0]); |
| } |
| |
| TEST(Bits, StructOfBits) { |
| alignas(8)::std::uint8_t data[] = {0xe8, 0x7f, 0xfe, 0xf1, 0xff, 0xbf, 0x3d}; |
| auto struct_of_bits = |
| MakeAlignedStructOfBitsView</**/ ::std::uint8_t, 8>(data, sizeof data); |
| EXPECT_EQ(0xa, struct_of_bits.one_byte().mid_nibble().Read()); |
| EXPECT_FALSE(struct_of_bits.Ok()); |
| EXPECT_FALSE(struct_of_bits.located_byte().Ok()); |
| struct_of_bits.one_byte().mid_nibble().Write(0x01); |
| EXPECT_EQ(0xc4, data[0]); |
| EXPECT_TRUE(struct_of_bits.Ok()); |
| EXPECT_TRUE(struct_of_bits.located_byte().Ok()); |
| EXPECT_EQ(0x7f, struct_of_bits.located_byte().Read()); |
| EXPECT_EQ(0x9, struct_of_bits.two_byte().mid_nibble().Read()); |
| EXPECT_EQ(0x6, struct_of_bits.four_byte().one_byte().mid_nibble().Read()); |
| EXPECT_EQ(0x3, struct_of_bits.four_byte().high_nibble().Read()); |
| struct_of_bits.four_byte().one_byte().mid_nibble().Write(0x9); |
| EXPECT_EQ(0x7f, data[5]); |
| EXPECT_EQ(0x3e, data[6]); |
| EXPECT_EQ(101, struct_of_bits.four_byte().low_nibble().Read()); |
| struct_of_bits.four_byte().low_nibble().Write(115); |
| EXPECT_EQ(0xff, data[3]); |
| // Out-of-[range] write. |
| EXPECT_DEATH(struct_of_bits.four_byte().low_nibble().Write(100), ""); |
| } |
| |
| TEST(Bits, StructOfBitsFromText) { |
| alignas(8)::std::uint8_t data[] = {0xe8, 0x7f, 0xfe, 0xf1, 0xff, 0xbf, 0x3d}; |
| auto struct_of_bits = |
| MakeAlignedStructOfBitsView</**/ ::std::uint8_t, 8>(data, sizeof data); |
| EXPECT_TRUE(::emboss::UpdateFromText(struct_of_bits, R"( |
| { |
| one_byte: { |
| high_bit: false |
| mid_nibble: 0x01 |
| } |
| four_byte: { |
| one_byte: { |
| mid_nibble: 0x9 |
| } |
| low_nibble: 115 |
| } |
| } |
| )")); |
| EXPECT_EQ(0x44, data[0]); |
| EXPECT_EQ(0x7f, data[5]); |
| EXPECT_EQ(0x3e, data[6]); |
| EXPECT_EQ(0xff, data[3]); |
| } |
| |
| TEST(Bits, ArrayOfBits) { |
| alignas(8)::std::uint8_t data[] = {0xe8, 0x7f, 0xfe, 0xf1, |
| 0xff, 0xbf, 0x00, 0x3d}; |
| auto bit_array = |
| MakeAlignedBitArrayView</**/ ::std::uint8_t, 8>(data, sizeof data); |
| EXPECT_EQ(0xa, bit_array.one_byte()[0].mid_nibble().Read()); |
| EXPECT_EQ(0xf, bit_array.one_byte()[7].mid_nibble().Read()); |
| bit_array.one_byte()[7].mid_nibble().Write(0x0); |
| EXPECT_EQ(0x01, data[7]); |
| EXPECT_TRUE(bit_array.Ok()); |
| bit_array = |
| MakeAlignedBitArrayView</**/ ::std::uint8_t, 8>(data, sizeof data - 1); |
| EXPECT_FALSE(bit_array.Ok()); |
| } |
| |
| TEST(Bits, ArrayInBits) { |
| ::std::uint8_t data[] = {0xaa, 0xaa}; |
| auto array = ArrayInBitsInStructWriter{data, sizeof data}; |
| EXPECT_EQ(false, array.array_in_bits().flags()[0].Read()); |
| EXPECT_EQ(true, array.array_in_bits().flags()[1].Read()); |
| EXPECT_EQ(false, array.array_in_bits().flags()[10].Read()); |
| EXPECT_EQ(true, array.array_in_bits().flags()[11].Read()); |
| array.array_in_bits().flags()[8].Write(true); |
| EXPECT_EQ(0xab, data[1]); |
| EXPECT_EQ(12U, array.array_in_bits().flags().SizeInBits()); |
| EXPECT_EQ(12U, array.array_in_bits().flags().ElementCount()); |
| EXPECT_TRUE(array.array_in_bits().flags().Ok()); |
| EXPECT_TRUE(array.array_in_bits().flags().IsComplete()); |
| } |
| |
| TEST(Bits, ArrayInBitsFromText) { |
| ::std::uint8_t data[] = {0, 0}; |
| auto array = ArrayInBitsInStructWriter{data, sizeof data}; |
| EXPECT_TRUE(::emboss::UpdateFromText(array.array_in_bits(), R"( |
| { |
| lone_flag: true |
| flags: { true, false, true, false, true, false, |
| true, false, true, false, true, false } |
| } |
| )")); |
| EXPECT_EQ(0x55, data[0]); |
| EXPECT_EQ(0x85, data[1]); |
| } |
| |
| TEST(Bits, ArrayInBitsToText) { |
| ::std::uint8_t data[] = {0x55, 0x85}; |
| auto array = ArrayInBitsInStructWriter{data, sizeof data}; |
| EXPECT_EQ( |
| "{\n" |
| " lone_flag: true\n" |
| " flags: {\n" |
| " [0]: true\n" |
| " [1]: false\n" |
| " [2]: true\n" |
| " [3]: false\n" |
| " [4]: true\n" |
| " [5]: false\n" |
| " [6]: true\n" |
| " [7]: false\n" |
| " [8]: true\n" |
| " [9]: false\n" |
| " [10]: true\n" |
| " [11]: false\n" |
| " }\n" |
| "}", |
| ::emboss::WriteToString(array.array_in_bits(), |
| ::emboss::MultilineText())); |
| } |
| |
| TEST(Bits, CopyFrom) { |
| ::std::array</**/ ::std::uint8_t, 4> buf_x = {0x00, 0x00}; |
| ::std::array</**/ ::std::uint8_t, 4> buf_y = {0xff, 0xff}; |
| |
| auto x = ArrayInBitsInStructWriter{&buf_x}; |
| auto y = ArrayInBitsInStructWriter{&buf_y}; |
| |
| EXPECT_NE(x.array_in_bits().flags()[0].Read(), |
| y.array_in_bits().flags()[0].Read()); |
| |
| x.array_in_bits().flags()[0].CopyFrom(y.array_in_bits().flags()[0]); |
| EXPECT_EQ(x.array_in_bits().flags()[0].Read(), |
| y.array_in_bits().flags()[0].Read()); |
| |
| EXPECT_NE(x.array_in_bits().flags()[1].Read(), |
| y.array_in_bits().flags()[1].Read()); |
| EXPECT_NE(x.array_in_bits().flags()[10].Read(), |
| y.array_in_bits().flags()[10].Read()); |
| EXPECT_NE(x.array_in_bits().flags()[11].Read(), |
| y.array_in_bits().flags()[11].Read()); |
| } |
| |
| TEST(Bits, TryToCopyFrom) { |
| ::std::array</**/ ::std::uint8_t, 4> buf_x = {0x00, 0x00}; |
| ::std::array</**/ ::std::uint8_t, 4> buf_y = {0xff, 0xff}; |
| |
| auto x = ArrayInBitsInStructWriter{&buf_x}; |
| auto y = ArrayInBitsInStructWriter{&buf_y}; |
| |
| EXPECT_NE(x.array_in_bits().flags()[0].Read(), |
| y.array_in_bits().flags()[0].Read()); |
| |
| EXPECT_TRUE( |
| x.array_in_bits().flags()[0].TryToCopyFrom(y.array_in_bits().flags()[0])); |
| EXPECT_EQ(x.array_in_bits().flags()[0].Read(), |
| y.array_in_bits().flags()[0].Read()); |
| |
| EXPECT_NE(x.array_in_bits().flags()[1].Read(), |
| y.array_in_bits().flags()[1].Read()); |
| EXPECT_NE(x.array_in_bits().flags()[10].Read(), |
| y.array_in_bits().flags()[10].Read()); |
| EXPECT_NE(x.array_in_bits().flags()[11].Read(), |
| y.array_in_bits().flags()[11].Read()); |
| } |
| |
| TEST(Bits, Equals) { |
| alignas(8)::std::uint8_t buf_x[] = {0xe8, 0x7f, 0xfe, 0xf1, |
| 0xff, 0xbf, 0x00, 0x3d}; |
| alignas(8)::std::uint8_t buf_y[] = {0xe8, 0x7f, 0xfe, 0xf1, |
| 0xff, 0xbf, 0x00, 0x3d}; |
| |
| auto x = MakeAlignedBitArrayView</**/ ::std::uint8_t, 8>(buf_x, sizeof buf_x); |
| auto x_const = |
| MakeBitArrayView(static_cast</**/ ::std::uint8_t *>(buf_x), sizeof buf_x); |
| auto y = MakeAlignedBitArrayView</**/ ::std::uint8_t, 8>(buf_y, sizeof buf_y); |
| |
| EXPECT_TRUE(x.Equals(x)); |
| EXPECT_TRUE(x.UncheckedEquals(x)); |
| EXPECT_TRUE(y.Equals(y)); |
| EXPECT_TRUE(y.UncheckedEquals(y)); |
| |
| EXPECT_TRUE(x.Equals(y)); |
| EXPECT_TRUE(x.UncheckedEquals(y)); |
| EXPECT_TRUE(y.Equals(x)); |
| EXPECT_TRUE(y.UncheckedEquals(x)); |
| |
| EXPECT_TRUE(x_const.Equals(y)); |
| EXPECT_TRUE(x_const.UncheckedEquals(y)); |
| EXPECT_TRUE(y.Equals(x_const)); |
| EXPECT_TRUE(y.UncheckedEquals(x_const)); |
| |
| ++buf_y[1]; |
| EXPECT_FALSE(x.Equals(y)); |
| EXPECT_FALSE(x.UncheckedEquals(y)); |
| EXPECT_FALSE(y.Equals(x)); |
| EXPECT_FALSE(y.UncheckedEquals(x)); |
| |
| EXPECT_FALSE(x_const.Equals(y)); |
| EXPECT_FALSE(x_const.UncheckedEquals(y)); |
| EXPECT_FALSE(y.Equals(x_const)); |
| EXPECT_FALSE(y.UncheckedEquals(x_const)); |
| } |
| |
| } // namespace |
| } // namespace test |
| } // namespace emboss |