mirror of
https://github.com/Evolution-X/hardware_interfaces
synced 2026-02-03 03:14:17 +00:00
f2493a3c3a
`devname_value` is a local variable; if `property_get` succeeds, we'll return a pointer to it. Returning a `std::string` instead sidesteps this problem. Bug: 190757198 Test: TreeHugger Change-Id: If9ca733dd21128706f2a9f62e8460b1286631aa5
88 lines
2.5 KiB
C++
88 lines
2.5 KiB
C++
/*
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* Copyright (C) 2021 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 "GnssReplayUtils.h"
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namespace android {
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namespace hardware {
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namespace gnss {
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namespace common {
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std::string ReplayUtils::getGnssPath() {
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char devname_value[PROPERTY_VALUE_MAX] = "";
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if (property_get("debug.location.gnss.devname", devname_value, NULL) > 0) {
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return devname_value;
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}
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return GNSS_PATH;
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}
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bool ReplayUtils::hasGnssDeviceFile() {
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struct stat sb;
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return stat(getGnssPath().c_str(), &sb) != -1;
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}
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bool ReplayUtils::isGnssRawMeasurement(const std::string& inputStr) {
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// TODO: add more logic check to by pass invalid data.
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return !inputStr.empty() && (inputStr.find("Raw") != std::string::npos);
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}
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bool ReplayUtils::isNMEA(const std::string& inputStr) {
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return !inputStr.empty() &&
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(inputStr.rfind("$GPRMC,", 0) == 0 || inputStr.rfind("$GPRMA,", 0) == 0);
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}
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std::string ReplayUtils::getDataFromDeviceFile(const std::string& command, int mMinIntervalMs) {
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char inputBuffer[INPUT_BUFFER_SIZE];
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int mGnssFd = open(getGnssPath().c_str(), O_RDWR | O_NONBLOCK);
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if (mGnssFd == -1) {
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return "";
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}
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int bytes_write = write(mGnssFd, command.c_str(), command.size());
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if (bytes_write <= 0) {
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return "";
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}
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struct epoll_event ev, events[1];
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ev.data.fd = mGnssFd;
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ev.events = EPOLLIN;
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int epoll_fd = epoll_create1(0);
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epoll_ctl(epoll_fd, EPOLL_CTL_ADD, mGnssFd, &ev);
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int bytes_read = -1;
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std::string inputStr = "";
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int epoll_ret = epoll_wait(epoll_fd, events, 1, mMinIntervalMs);
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if (epoll_ret == -1) {
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return "";
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}
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while (true) {
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memset(inputBuffer, 0, INPUT_BUFFER_SIZE);
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bytes_read = read(mGnssFd, &inputBuffer, INPUT_BUFFER_SIZE);
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if (bytes_read <= 0) {
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break;
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}
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inputStr += std::string(inputBuffer, bytes_read);
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}
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return inputStr;
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}
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} // namespace common
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} // namespace gnss
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} // namespace hardware
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} // namespace android
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