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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);
}
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