mirror of
https://github.com/openharmony/powermgr_battery_manager.git
synced 2026-07-01 06:42:05 -04:00
baoguotao
92 lines
2.6 KiB
C++
Executable File
92 lines
2.6 KiB
C++
Executable File
/*
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* Copyright (c) 2021 Huawei Device Co., Ltd.
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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 "battery_backlight.h"
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#include <hdf_log.h>
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#include <hdf_base.h>
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#include <string>
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namespace OHOS {
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namespace HDI {
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namespace Battery {
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namespace V1_0 {
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static const std::string BACKLIGHT_DEVICE_PATH = "/sys/class/backlight/sprd_backlight/brightness";
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static const std::string SEMICOLON = ";";
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static const int MAX_STR = 255;
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static const unsigned int BACKLIGHT_ON = 128;
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static const unsigned int BACKLIGHT_OFF = 0;
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void BatteryBacklight::TurnOnScreen()
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{
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HDF_LOGI("%{public}s enter", __func__);
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HandleBacklight(BACKLIGHT_ON);
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screenOn_ = true;
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}
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void BatteryBacklight::TurnOffScreen()
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{
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HDF_LOGI("%{public}s enter", __func__);
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HandleBacklight(BACKLIGHT_OFF);
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screenOn_ = false;
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}
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bool BatteryBacklight::GetScreenState()
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{
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HDF_LOGI("%{public}s enter", __func__);
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return screenOn_;
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}
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int BatteryBacklight::HandleBacklight(const unsigned int backlight)
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{
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HDF_LOGI("%{public}s enter", __func__);
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FILE *fp = nullptr;
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int writeFile = -1;
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char *path = nullptr;
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char *pathGroup = nullptr;
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unsigned int bufferLen;
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HDF_LOGI("%{public}s: backlight value is %{public}d", __func__, backlight);
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bufferLen = strnlen(BACKLIGHT_DEVICE_PATH.c_str(), MAX_STR) + 1;
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pathGroup = (char*)malloc(bufferLen);
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if (pathGroup == nullptr) {
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HDF_LOGD("%{public}s: malloc error.", __func__);
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return writeFile;
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}
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strlcpy(pathGroup, BACKLIGHT_DEVICE_PATH.c_str(), bufferLen);
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path = pathGroup;
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while ((path = strtok(path, SEMICOLON.c_str())) != nullptr) {
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fp = fopen(path, "w");
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if (fp != nullptr) {
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writeFile = fprintf(fp, "%u\n", backlight);
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fclose(fp);
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}
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if (writeFile <= 0) {
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HDF_LOGD("%{public}s: failed to set backlight path=%{pusblic}s.", __func__, path);
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}
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path = nullptr;
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}
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free(pathGroup);
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HDF_LOGI("%{public}s exit", __func__);
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return writeFile;
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}
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} // namespace V1_0
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} // namespace Battery
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} // namespace HDI
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} // namespace OHOS
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