Add a ClassOfDevice type (60d8af15) · Commits · e / os / android_packages_modules_Bluetooth

system/types/Android.bp

+2 −0

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		@@ -16,6 +16,7 @@ cc_library_static {
		],
		host_supported: true,
		srcs: [
		"class_of_device.cc",
		"raw_address.cc",
		"bluetooth/uuid.cc",
		],
		@@ -30,6 +31,7 @@ cc_test {
		defaults: ["fluoride_defaults"],
		host_supported: true,
		srcs: [
		"test/class_of_device_unittest.cc",
		"test/raw_address_unittest.cc",
		"test/bluetooth/uuid_unittest.cc",
		],

system/types/class_of_device.cc

0 → 100644

+78 −0

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		/******************************************************************************
		*
		* Copyright 2018 The Android Open Source Project
		*
		* 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.
		*
		******************************************************************************/

		#include "class_of_device.h"

		#include <base/strings/string_split.h>
		#include <base/strings/stringprintf.h>
		#include <stdint.h>
		#include <algorithm>
		#include <vector>

		static_assert(sizeof(ClassOfDevice) == ClassOfDevice::kLength,
		"ClassOfDevice must be 3 bytes long!");

		ClassOfDevice::ClassOfDevice(const uint8_t (&class_of_device)[kLength]) {
		std::copy(class_of_device, class_of_device + kLength, cod);
		};

		std::string ClassOfDevice::ToString() const {
		return base::StringPrintf("%03x-%01x-%02x",
		(static_cast<uint16_t>(cod[2]) << 4) \| cod[1] >> 4,
		cod[1] & 0x0f, cod[0]);
		}

		bool ClassOfDevice::FromString(const std::string& from, ClassOfDevice& to) {
		ClassOfDevice new_cod;
		if (from.length() != 8) return false;

		std::vector<std::string> byte_tokens =
		base::SplitString(from, "-", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);

		if (byte_tokens.size() != 3) return false;
		if (byte_tokens[0].length() != 3) return false;
		if (byte_tokens[1].length() != 1) return false;
		if (byte_tokens[2].length() != 2) return false;

		uint16_t values[3];

		for (size_t i = 0; i < kLength; i++) {
		const auto& token = byte_tokens[i];

		char* temp = nullptr;
		values[i] = strtol(token.c_str(), &temp, 16);
		if (*temp != '\0') return false;
		}

		new_cod.cod[0] = values[2];
		new_cod.cod[1] = values[1] \| ((values[0] & 0xf) << 4);
		new_cod.cod[2] = values[0] >> 4;

		to = new_cod;
		return true;
		}

		size_t ClassOfDevice::FromOctets(const uint8_t* from) {
		std::copy(from, from + kLength, cod);
		return kLength;
		};

		bool ClassOfDevice::IsValid(const std::string& cod) {
		ClassOfDevice tmp;
		return ClassOfDevice::FromString(cod, tmp);
		}

system/types/class_of_device.h

0 → 100644

+54 −0

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		/******************************************************************************
		*
		* Copyright 2018 The Android Open Source Project
		*
		* 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.
		*
		******************************************************************************/

		#pragma once

		#include <string>

		/** Bluetooth Class of Device */
		class ClassOfDevice final {
		public:
		static constexpr unsigned int kLength = 3;

		uint8_t cod[kLength];

		ClassOfDevice() = default;
		ClassOfDevice(const uint8_t (&class_of_device)[kLength]);

		bool operator==(const ClassOfDevice& rhs) const {
		return (std::memcmp(cod, rhs.cod, sizeof(cod)) == 0);
		}

		std::string ToString() const;

		// Converts \|string\| to ClassOfDevice and places it in \|to\|. If \|from\| does
		// not represent a Class of Device, \|to\| is not modified and this function
		// returns false. Otherwise, it returns true.
		static bool FromString(const std::string& from, ClassOfDevice& to);

		// Copies \|from\| raw Class of Device octets to the local object.
		// Returns the number of copied octets (always ClassOfDevice::kLength)
		size_t FromOctets(const uint8_t* from);

		static bool IsValid(const std::string& class_of_device);
		};

		inline std::ostream& operator<<(std::ostream& os, const ClassOfDevice& c) {
		os << c.ToString();
		return os;
		}

system/types/test/class_of_device_unittest.cc

0 → 100644

+96 −0

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		/******************************************************************************
		*
		* Copyright 2018 The Android Open Source Project
		*
		* 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.
		*
		******************************************************************************/

		#include <gtest/gtest.h>

		#include "class_of_device.h"

		static const char* test_class = "efc-d-ab";
		static const uint8_t test_bytes[]{0xab, 0xcd, 0xef};

		TEST(ClassOfDeviceUnittest, test_constructor_array) {
		ClassOfDevice cod(test_bytes);

		ASSERT_EQ(test_bytes[0], cod.cod[0]);
		ASSERT_EQ(test_bytes[1], cod.cod[1]);
		ASSERT_EQ(test_bytes[2], cod.cod[2]);

		std::string ret = cod.ToString();

		ASSERT_STREQ(test_class, ret.c_str());
		}

		TEST(ClassOfDeviceUnittest, test_to_from_str) {
		ClassOfDevice cod;
		ClassOfDevice::FromString(test_class, cod);

		ASSERT_EQ(test_bytes[0], cod.cod[0]);
		ASSERT_EQ(test_bytes[1], cod.cod[1]);
		ASSERT_EQ(test_bytes[2], cod.cod[2]);

		std::string ret = cod.ToString();

		ASSERT_STREQ(test_class, ret.c_str());
		}

		TEST(ClassOfDeviceUnittest, test_from_octets) {
		ClassOfDevice cod;
		size_t expected_result = ClassOfDevice::kLength;
		ASSERT_EQ(expected_result, cod.FromOctets(test_bytes));

		ASSERT_EQ(test_bytes[0], cod.cod[0]);
		ASSERT_EQ(test_bytes[1], cod.cod[1]);
		ASSERT_EQ(test_bytes[2], cod.cod[2]);

		std::string ret = cod.ToString();

		ASSERT_STREQ(test_class, ret.c_str());
		}

		TEST(ClassOfDeviceTest, test_copy) {
		ClassOfDevice cod1;
		ClassOfDevice cod2;
		ClassOfDevice::FromString(test_class, cod1);
		cod2 = cod1;

		ASSERT_EQ(cod1.cod[0], cod2.cod[0]);
		ASSERT_EQ(cod1.cod[1], cod2.cod[1]);
		ASSERT_EQ(cod1.cod[2], cod2.cod[2]);
		}

		TEST(ClassOfDeviceTest, IsValid) {
		EXPECT_FALSE(ClassOfDevice::IsValid(""));
		EXPECT_FALSE(ClassOfDevice::IsValid("000000"));
		EXPECT_FALSE(ClassOfDevice::IsValid("00-00-00"));
		EXPECT_FALSE(ClassOfDevice::IsValid("000-0-0"));
		EXPECT_TRUE(ClassOfDevice::IsValid("000-0-00"));
		EXPECT_TRUE(ClassOfDevice::IsValid("ABc-d-00"));
		EXPECT_TRUE(ClassOfDevice::IsValid("aBc-D-eF"));
		}

		TEST(ClassOfDeviceTest, classOfDeviceFromString) {
		ClassOfDevice cod;

		EXPECT_TRUE(ClassOfDevice::FromString("000-0-00", cod));
		const ClassOfDevice result0 = {{0x00, 0x00, 0x00}};
		EXPECT_EQ(0, memcmp(&cod, &result0, sizeof(cod)));

		EXPECT_TRUE(ClassOfDevice::FromString("ab2-1-4C", cod));
		const ClassOfDevice result1 = {{0x4c, 0x21, 0xab}};
		EXPECT_EQ(0, memcmp(&cod, &result1, sizeof(cod)));
		}