mirror of
https://github.com/Evolution-X/hardware_interfaces
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b87cdae8d6
Bug: 175635923 Test: m MODULES-IN-hardware-interfaces-automotive-can Change-Id: I2fcc511f45d87b0ca6d80d18df2ba9f92e0155f9
59 lines
1.5 KiB
C++
59 lines
1.5 KiB
C++
/*
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* Copyright (C) 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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#include "common.h"
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#include <android-base/logging.h>
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#include <net/if.h>
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#include <algorithm>
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namespace android::nl {
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unsigned int nametoindex(const std::string& ifname) {
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const auto ifidx = if_nametoindex(ifname.c_str());
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if (ifidx != 0) return ifidx;
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if (errno != ENODEV) {
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PLOG(ERROR) << "if_nametoindex(" << ifname << ") failed";
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}
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return 0;
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}
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std::string printableOnly(std::string str) {
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const auto isInvalid = [](char c) { return !isprint(c); };
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std::replace_if(str.begin(), str.end(), isInvalid, '?');
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return str;
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}
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uint16_t crc16(const Buffer<uint8_t> data, uint16_t crc) {
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for (const auto byte : data.getRaw()) {
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crc ^= byte;
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for (unsigned i = 0; i < 8; i++) {
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if (crc & 1) {
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crc = (crc >> 1) ^ 0xA001;
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} else {
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crc >>= 1;
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}
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}
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}
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return crc;
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}
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} // namespace android::nl
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