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140 lines
3.8 KiB
140 lines
3.8 KiB
/******************************************************************************
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*
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* Copyright 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************/
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#include "hci/class_of_device.h"
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#include <algorithm>
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#include <cstdint>
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#include <cstdio>
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#include <cstdlib>
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#include <sstream>
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#include <vector>
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#include "common/numbers.h"
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#include "common/strings.h"
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#include "os/log.h"
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namespace bluetooth {
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namespace hci {
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// ClassOfDevice cannot initialize member variables as it is a POD type
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// NOLINTNEXTLINE(cppcoreguidelines-pro-type-member-init)
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ClassOfDevice::ClassOfDevice(const uint8_t (&class_of_device)[kLength]) {
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std::copy(class_of_device, class_of_device + kLength, cod.data());
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};
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std::string ClassOfDevice::ToString() const {
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char buffer[] = "000-0-00";
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std::snprintf(&buffer[0], sizeof(buffer), "%03x-%01x-%02x", (static_cast<uint16_t>(cod[2]) << 4) | cod[1] >> 4,
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cod[1] & 0x0f, cod[0]);
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std::string str(buffer);
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return str;
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}
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std::string ClassOfDevice::ToLegacyConfigString() const {
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return std::to_string(ToUint32Legacy());
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}
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std::optional<ClassOfDevice> ClassOfDevice::FromString(const std::string& str) {
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if (str.length() != 8) {
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return std::nullopt;
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}
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std::istringstream stream(str);
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std::string token;
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int index = 0;
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uint16_t values[3];
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ClassOfDevice new_cod{};
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while (getline(stream, token, '-')) {
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if (index >= 3) {
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return std::nullopt;
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}
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if (index == 0 && token.length() != 3) {
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return std::nullopt;
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} else if (index == 1 && token.length() != 1) {
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return std::nullopt;
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} else if (index == 2 && token.length() != 2) {
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return std::nullopt;
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}
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char* temp = nullptr;
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values[index] = std::strtol(token.c_str(), &temp, 16);
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if (*temp != '\0') {
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return std::nullopt;
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}
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index++;
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}
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if (index != 3) {
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return std::nullopt;
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}
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new_cod.cod[0] = values[2];
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new_cod.cod[1] = values[1] | ((values[0] & 0xf) << 4);
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new_cod.cod[2] = values[0] >> 4;
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return new_cod;
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}
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bool ClassOfDevice::FromString(const std::string& from, ClassOfDevice& to) {
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auto new_cod = FromString(from);
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if (!new_cod) {
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to = {};
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return false;
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}
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to = std::move(*new_cod);
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return true;
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}
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std::optional<ClassOfDevice> ClassOfDevice::FromUint32Legacy(uint32_t cod_int) {
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if (cod_int != 0 && (cod_int >> 24) != 0) {
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return std::nullopt;
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}
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ClassOfDevice result = {};
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result.cod[2] = static_cast<uint8_t>(cod_int);
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result.cod[1] = static_cast<uint8_t>(cod_int >> 8);
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result.cod[0] = static_cast<uint8_t>(cod_int >> 16);
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return result;
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}
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std::optional<ClassOfDevice> ClassOfDevice::FromLegacyConfigString(const std::string& str) {
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char* ptr = nullptr;
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auto num = std::strtoull(str.data(), &ptr, 10);
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if (num > 0xffffff) {
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return std::nullopt;
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}
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return FromUint32Legacy(static_cast<uint32_t>(num));
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}
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uint32_t ClassOfDevice::ToUint32Legacy() const {
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return (cod[2]) | (cod[1] << 8) | (cod[0] << 16);
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}
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size_t ClassOfDevice::FromOctets(const uint8_t* from) {
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std::copy(from, from + kLength, data());
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return kLength;
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};
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bool ClassOfDevice::IsValid(const std::string& cod) {
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return ClassOfDevice::FromString(cod).has_value();
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}
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} // namespace hci
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} // namespace bluetooth
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