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/******************************************************************************
*
* Copyright 2019 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 "hci/class_of_device.h"
#include <algorithm>
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <sstream>
#include <vector>
#include "common/numbers.h"
#include "common/strings.h"
#include "os/log.h"
namespace bluetooth {
namespace hci {
// ClassOfDevice cannot initialize member variables as it is a POD type
// NOLINTNEXTLINE(cppcoreguidelines-pro-type-member-init)
ClassOfDevice::ClassOfDevice(const uint8_t (&class_of_device)[kLength]) {
std::copy(class_of_device, class_of_device + kLength, cod.data());
};
std::string ClassOfDevice::ToString() const {
char buffer[] = "000-0-00";
std::snprintf(&buffer[0], sizeof(buffer), "%03x-%01x-%02x", (static_cast<uint16_t>(cod[2]) << 4) | cod[1] >> 4,
cod[1] & 0x0f, cod[0]);
std::string str(buffer);
return str;
}
std::string ClassOfDevice::ToLegacyConfigString() const {
return std::to_string(ToUint32Legacy());
}
std::optional<ClassOfDevice> ClassOfDevice::FromString(const std::string& str) {
if (str.length() != 8) {
return std::nullopt;
}
std::istringstream stream(str);
std::string token;
int index = 0;
uint16_t values[3];
ClassOfDevice new_cod{};
while (getline(stream, token, '-')) {
if (index >= 3) {
return std::nullopt;
}
if (index == 0 && token.length() != 3) {
return std::nullopt;
} else if (index == 1 && token.length() != 1) {
return std::nullopt;
} else if (index == 2 && token.length() != 2) {
return std::nullopt;
}
char* temp = nullptr;
values[index] = std::strtol(token.c_str(), &temp, 16);
if (*temp != '\0') {
return std::nullopt;
}
index++;
}
if (index != 3) {
return std::nullopt;
}
new_cod.cod[0] = values[2];
new_cod.cod[1] = values[1] | ((values[0] & 0xf) << 4);
new_cod.cod[2] = values[0] >> 4;
return new_cod;
}
bool ClassOfDevice::FromString(const std::string& from, ClassOfDevice& to) {
auto new_cod = FromString(from);
if (!new_cod) {
to = {};
return false;
}
to = std::move(*new_cod);
return true;
}
std::optional<ClassOfDevice> ClassOfDevice::FromUint32Legacy(uint32_t cod_int) {
if (cod_int != 0 && (cod_int >> 24) != 0) {
return std::nullopt;
}
ClassOfDevice result = {};
result.cod[2] = static_cast<uint8_t>(cod_int);
result.cod[1] = static_cast<uint8_t>(cod_int >> 8);
result.cod[0] = static_cast<uint8_t>(cod_int >> 16);
return result;
}
std::optional<ClassOfDevice> ClassOfDevice::FromLegacyConfigString(const std::string& str) {
char* ptr = nullptr;
auto num = std::strtoull(str.data(), &ptr, 10);
if (num > 0xffffff) {
return std::nullopt;
}
return FromUint32Legacy(static_cast<uint32_t>(num));
}
uint32_t ClassOfDevice::ToUint32Legacy() const {
return (cod[2]) | (cod[1] << 8) | (cod[0] << 16);
}
size_t ClassOfDevice::FromOctets(const uint8_t* from) {
std::copy(from, from + kLength, data());
return kLength;
};
bool ClassOfDevice::IsValid(const std::string& cod) {
return ClassOfDevice::FromString(cod).has_value();
}
} // namespace hci
} // namespace bluetooth
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