C++ String8::clear方法代码示例

status_t StreamingProcessor::dump(int fd, const Vector<String16>& /*args*/) {
    String8 result;

    result.append("  Current requests:\n");
    if (mPreviewRequest.entryCount() != 0) {
        result.append("    Preview request:\n");
        write(fd, result.string(), result.size());
        mPreviewRequest.dump(fd, 2, 6);
        result.clear();
    } else {
        result.append("    Preview request: undefined\n");
    }

    if (mRecordingRequest.entryCount() != 0) {
        result = "    Recording request:\n";
        write(fd, result.string(), result.size());
        mRecordingRequest.dump(fd, 2, 6);
        result.clear();
    } else {
        result = "    Recording request: undefined\n";
    }

    const char* streamTypeString[] = {
        "none", "preview", "record"
    };
    result.append(String8::format("   Active request: %s (paused: %s)\n",
                                  streamTypeString[mActiveRequest],
                                  mPaused ? "yes" : "no"));

    write(fd, result.string(), result.size());

    return OK;
}

void HDMIAudioCaps::getChannelMasksForAF(String8& masks) {
    Mutex::Autolock _l(mLock);
    masks.clear();

    // If the sink does not support basic audio, then it supports no audio.
    if (!mBasicAudioSupported)
        return;

    masks.append("AUDIO_CHANNEL_OUT_STEREO");

    // To keep things simple, only report mode information for the mode
    // which supports the maximum number of channels.
    ssize_t ndx = getMaxChModeNdx_l();
    if (ndx < 0)
        return;

    if (mModes[ndx].max_ch >= 6) {
        if (masks.length())
            masks.append("|");

        masks.append((mModes[ndx].max_ch >= 8)
                ? "AUDIO_CHANNEL_OUT_5POINT1|AUDIO_CHANNEL_OUT_7POINT1"
                : "AUDIO_CHANNEL_OUT_5POINT1");
    }
}

void HDMIAudioCaps::getRatesForAF(String8& rates) {
    Mutex::Autolock _l(mLock);
    rates.clear();

    // If the sink does not support basic audio, then it supports no audio.
    if (!mBasicAudioSupported)
        return;

    // Basic audio always supports from 32k through 38k.
    uint32_t tmp = kSR_32000 | kSR_44100 | kSR_48000;

    // To keep things simple, only report mode information for the PCM mode
    // which supports the maximum number of channels.
    ssize_t ndx = getMaxChModeNdx_l();
    if (ndx >= 0)
        tmp |= mModes[ndx].sr_bitmask;

    bool first = true;
    for (uint32_t i = 1; tmp; i <<= 1) {
        if (i & tmp) {
            rates.appendFormat(first ? "%d" : "|%d", srMaskToSR(i));
            first = false;
            tmp &= ~i;
        }
    }
}

void NBLog::Reader::dumpLine(const String8& timestamp, String8& body)
{
    if (mFd >= 0) {
        dprintf(mFd, "%.*s%s %s\n", mIndent, "", timestamp.string(), body.string());
    } else {
        ALOGI("%.*s%s %s", mIndent, "", timestamp.string(), body.string());
    }
    body.clear();
}

        static bool find(String8& result,
                const String8& pattern, const char* const search, bool exact) {

            // in the emulator case, we just return the hardcoded name
            // of the software renderer.
            if (checkGlesEmulationStatus() == 0) {
                ALOGD("Emulator without GPU support detected. "
                      "Fallback to software renderer.");
#if defined(__LP64__)
                result.setTo("/system/lib64/egl/libGLES_android.so");
#else
                result.setTo("/system/lib/egl/libGLES_android.so");
#endif
                return true;
            }

            if (exact) {
                String8 absolutePath;
                absolutePath.appendFormat("%s/%s.so", search, pattern.string());
                if (!access(absolutePath.string(), R_OK)) {
                    result = absolutePath;
                    return true;
                }
                return false;
            }

            DIR* d = opendir(search);
            if (d != NULL) {
                struct dirent cur;
                struct dirent* e;
                while (readdir_r(d, &cur, &e) == 0 && e) {
                    if (e->d_type == DT_DIR) {
                        continue;
                    }
                    if (!strcmp(e->d_name, "libGLES_android.so")) {
                        // always skip the software renderer
                        continue;
                    }
                    if (strstr(e->d_name, pattern.string()) == e->d_name) {
                        if (!strcmp(e->d_name + strlen(e->d_name) - 3, ".so")) {
                            result.clear();
                            result.appendFormat("%s/%s", search, e->d_name);
                            closedir(d);
                            return true;
                        }
                    }
                }
                closedir(d);
            }
            return false;
        }

status_t DrmPlugin::getKeyRequest(
        const Vector<uint8_t>& scope,
        const Vector<uint8_t>& initData,
        const String8& initDataType,
        KeyType keyType,
        const KeyedVector<String8, String8>& optionalParameters,
        Vector<uint8_t>& request,
        String8& defaultUrl) {
    UNUSED(optionalParameters);
    if (keyType != kKeyType_Streaming) {
        return android::ERROR_DRM_CANNOT_HANDLE;
    }

    sp<Session> session = mSessionLibrary->findSession(scope);
    defaultUrl.clear();
    return session->getKeyRequest(initData, initDataType, &request);
}

        static bool find(String8& result,
                const String8& pattern, const char* const search, bool exact) {
            if (exact) {
                String8 absolutePath;
                absolutePath.appendFormat("%s/%s.so", search, pattern.string());
                if (!access(absolutePath.string(), R_OK)) {
                    result = absolutePath;
                    return true;
                }
                return false;
            }

            DIR* d = opendir(search);
            if (d != NULL) {
                struct dirent cur;
                struct dirent* e;
                while (readdir_r(d, &cur, &e) == 0 && e) {
                    if (e->d_type == DT_DIR) {
                        continue;
                    }
                    if (!strcmp(e->d_name, "libGLES_android.so")) {
                        // always skip the software renderer
                        continue;
                    }
                    if (strstr(e->d_name, pattern.string()) == e->d_name) {
                        if (!strcmp(e->d_name + strlen(e->d_name) - 3, ".so")) {
                            result.clear();
                            result.appendFormat("%s/%s", search, e->d_name);
                            closedir(d);
                            return true;
                        }
                    }
                }
                closedir(d);
            }
            return false;
        }

void BatteryMonitor::init(struct healthd_config *hc, bool nosvcmgr) {
    String8 path;

    mHealthdConfig = hc;
    DIR* dir = opendir(POWER_SUPPLY_SYSFS_PATH);
    if (dir == NULL) {
        KLOG_ERROR(LOG_TAG, "Could not open %s\n", POWER_SUPPLY_SYSFS_PATH);
    } else {
        struct dirent* entry;

        while ((entry = readdir(dir))) {
            const char* name = entry->d_name;

            if (!strcmp(name, ".") || !strcmp(name, ".."))
                continue;

            char buf[20];
            // Look for "type" file in each subdirectory
            path.clear();
            path.appendFormat("%s/%s/type", POWER_SUPPLY_SYSFS_PATH, name);
            switch(readPowerSupplyType(path)) {
            case ANDROID_POWER_SUPPLY_TYPE_AC:
            case ANDROID_POWER_SUPPLY_TYPE_USB:
            case ANDROID_POWER_SUPPLY_TYPE_WIRELESS:
                path.clear();
                path.appendFormat("%s/%s/online", POWER_SUPPLY_SYSFS_PATH, name);
                if (access(path.string(), R_OK) == 0)
                    mChargerNames.add(String8(name));
                break;

            case ANDROID_POWER_SUPPLY_TYPE_BATTERY:
                if (mHealthdConfig->batteryStatusPath.isEmpty()) {
                    path.clear();
                    path.appendFormat("%s/%s/status", POWER_SUPPLY_SYSFS_PATH,
                                      name);
                    if (access(path, R_OK) == 0)
                        mHealthdConfig->batteryStatusPath = path;
                }

                if (mHealthdConfig->batteryHealthPath.isEmpty()) {
                    path.clear();
                    path.appendFormat("%s/%s/health", POWER_SUPPLY_SYSFS_PATH,
                                      name);
                    if (access(path, R_OK) == 0)
                        mHealthdConfig->batteryHealthPath = path;
                }

                if (mHealthdConfig->batteryPresentPath.isEmpty()) {
                    path.clear();
                    path.appendFormat("%s/%s/present", POWER_SUPPLY_SYSFS_PATH,
                                      name);
                    if (access(path, R_OK) == 0)
                        mHealthdConfig->batteryPresentPath = path;
                }

                if (mHealthdConfig->batteryCapacityPath.isEmpty()) {
                    path.clear();
                    path.appendFormat("%s/%s/capacity", POWER_SUPPLY_SYSFS_PATH,
                                      name);
                    if (access(path, R_OK) == 0)
                        mHealthdConfig->batteryCapacityPath = path;
                }

                if (mHealthdConfig->batteryVoltagePath.isEmpty()) {
                    path.clear();
                    path.appendFormat("%s/%s/voltage_now",
                                      POWER_SUPPLY_SYSFS_PATH, name);
                    if (access(path, R_OK) == 0) {
                        mHealthdConfig->batteryVoltagePath = path;
                    } else {
                        path.clear();
                        path.appendFormat("%s/%s/batt_vol",
                                          POWER_SUPPLY_SYSFS_PATH, name);
                        if (access(path, R_OK) == 0)
                            mHealthdConfig->batteryVoltagePath = path;
                    }
                }

                if (mHealthdConfig->batteryCurrentNowPath.isEmpty()) {
                    path.clear();
                    path.appendFormat("%s/%s/current_now",
                                      POWER_SUPPLY_SYSFS_PATH, name);
                    if (access(path, R_OK) == 0)
                        mHealthdConfig->batteryCurrentNowPath = path;
                }

                if (mHealthdConfig->batteryChargeCounterPath.isEmpty()) {
                    path.clear();
                    path.appendFormat("%s/%s/charge_counter",
                                      POWER_SUPPLY_SYSFS_PATH, name);
                    if (access(path, R_OK) == 0)
                        mHealthdConfig->batteryChargeCounterPath = path;
                }

                if (mHealthdConfig->batteryTemperaturePath.isEmpty()) {
                    path.clear();
                    path.appendFormat("%s/%s/temp", POWER_SUPPLY_SYSFS_PATH,
                                      name);
                    if (access(path, R_OK) == 0) {
                        mHealthdConfig->batteryTemperaturePath = path;
//.........这里部分代码省略.........

bool BatteryMonitor::update(void) {
    struct BatteryProperties props;
    bool logthis;

    props.chargerAcOnline = false;
    props.chargerUsbOnline = false;
    props.chargerWirelessOnline = false;
    props.batteryStatus = BATTERY_STATUS_UNKNOWN;
    props.batteryHealth = BATTERY_HEALTH_UNKNOWN;
    props.batteryCurrentNow = INT_MIN;
    props.batteryChargeCounter = INT_MIN;

    if (!mHealthdConfig->batteryPresentPath.isEmpty())
        props.batteryPresent = getBooleanField(mHealthdConfig->batteryPresentPath);
    else
        props.batteryPresent = true;

    props.batteryLevel = getIntField(mHealthdConfig->batteryCapacityPath);
    props.batteryVoltage = getIntField(mHealthdConfig->batteryVoltagePath) / 1000;

    if (!mHealthdConfig->batteryCurrentNowPath.isEmpty())
        props.batteryCurrentNow = getIntField(mHealthdConfig->batteryCurrentNowPath);

    if (!mHealthdConfig->batteryChargeCounterPath.isEmpty())
        props.batteryChargeCounter = getIntField(mHealthdConfig->batteryChargeCounterPath);

    props.batteryTemperature = getIntField(mHealthdConfig->batteryTemperaturePath);

    const int SIZE = 128;
    char buf[SIZE];
    String8 btech;

    if (readFromFile(mHealthdConfig->batteryStatusPath, buf, SIZE) > 0)
        props.batteryStatus = getBatteryStatus(buf);

    if (readFromFile(mHealthdConfig->batteryHealthPath, buf, SIZE) > 0)
        props.batteryHealth = getBatteryHealth(buf);

    if (readFromFile(mHealthdConfig->batteryTechnologyPath, buf, SIZE) > 0)
        props.batteryTechnology = String8(buf);

    unsigned int i;

    for (i = 0; i < mChargerNames.size(); i++) {
        String8 path;
        path.appendFormat("%s/%s/online", POWER_SUPPLY_SYSFS_PATH,
                          mChargerNames[i].string());

        if (readFromFile(path, buf, SIZE) > 0) {
            if (buf[0] != '0') {
                path.clear();
                path.appendFormat("%s/%s/type", POWER_SUPPLY_SYSFS_PATH,
                                  mChargerNames[i].string());
                switch(readPowerSupplyType(path)) {
                case ANDROID_POWER_SUPPLY_TYPE_AC:
                    props.chargerAcOnline = true;
                    break;
                case ANDROID_POWER_SUPPLY_TYPE_USB:
                    props.chargerUsbOnline = true;
                    break;
                case ANDROID_POWER_SUPPLY_TYPE_WIRELESS:
                    props.chargerWirelessOnline = true;
                    break;
                default:
                    KLOG_WARNING(LOG_TAG, "%s: Unknown power supply type\n",
                                 mChargerNames[i].string());
                }
            }
        }
    }

    logthis = !healthd_board_battery_update(&props);

    if (logthis) {
        char dmesgline[256];
        snprintf(dmesgline, sizeof(dmesgline),
                 "battery l=%d v=%d t=%s%d.%d h=%d st=%d",
                 props.batteryLevel, props.batteryVoltage,
                 props.batteryTemperature < 0 ? "-" : "",
                 abs(props.batteryTemperature / 10),
                 abs(props.batteryTemperature % 10), props.batteryHealth,
                 props.batteryStatus);

        if (!mHealthdConfig->batteryCurrentNowPath.isEmpty()) {
            char b[20];

            snprintf(b, sizeof(b), " c=%d", props.batteryCurrentNow / 1000);
            strlcat(dmesgline, b, sizeof(dmesgline));
        }

        KLOG_INFO(LOG_TAG, "%s chg=%s%s%s\n", dmesgline,
                  props.chargerAcOnline ? "a" : "",
                  props.chargerUsbOnline ? "u" : "",
                  props.chargerWirelessOnline ? "w" : "");
    }

    char prop[PROP_VALUE_MAX];
    // always report AC plug-in and capacity 100% if emulated.battery is set to 1
    property_get("sys.emulated.battery", prop, "0");
    if (!strcmp(prop, "1")) {
//.........这里部分代码省略.........

bool BatteryMonitor::update(void) {
    bool logthis;

    props.chargerAcOnline = false;
    props.chargerUsbOnline = false;
    props.chargerWirelessOnline = false;
    props.batteryStatus = BATTERY_STATUS_UNKNOWN;
    props.batteryHealth = BATTERY_HEALTH_UNKNOWN;

    if (!mHealthdConfig->batteryPresentPath.isEmpty())
        props.batteryPresent = getBooleanField(mHealthdConfig->batteryPresentPath);
    else
        props.batteryPresent = mBatteryDevicePresent;

    props.batteryLevel = mBatteryFixedCapacity ?
        mBatteryFixedCapacity :
        getIntField(mHealthdConfig->batteryCapacityPath);
    props.batteryVoltage = getIntField(mHealthdConfig->batteryVoltagePath) / 1000;

    props.batteryTemperature = mBatteryFixedTemperature ?
        mBatteryFixedTemperature :
        getIntField(mHealthdConfig->batteryTemperaturePath);

    const int SIZE = 128;
    char buf[SIZE];
    String8 btech;

    if (readFromFile(mHealthdConfig->batteryStatusPath, buf, SIZE) > 0)
        props.batteryStatus = getBatteryStatus(buf);

    if (readFromFile(mHealthdConfig->batteryHealthPath, buf, SIZE) > 0)
        props.batteryHealth = getBatteryHealth(buf);

    if (readFromFile(mHealthdConfig->batteryTechnologyPath, buf, SIZE) > 0)
        props.batteryTechnology = String8(buf);

    unsigned int i;

    for (i = 0; i < mChargerNames.size(); i++) {
        String8 path;
        path.appendFormat("%s/%s/online", POWER_SUPPLY_SYSFS_PATH,
                          mChargerNames[i].string());

        if (readFromFile(path, buf, SIZE) > 0) {
            if (buf[0] != '0') {
                path.clear();
                path.appendFormat("%s/%s/type", POWER_SUPPLY_SYSFS_PATH,
                                  mChargerNames[i].string());
                switch(readPowerSupplyType(path)) {
                case ANDROID_POWER_SUPPLY_TYPE_AC:
                    props.chargerAcOnline = true;
                    break;
                case ANDROID_POWER_SUPPLY_TYPE_USB:
                    props.chargerUsbOnline = true;
                    break;
                case ANDROID_POWER_SUPPLY_TYPE_WIRELESS:
                    props.chargerWirelessOnline = true;
                    break;
                default:
                    KLOG_WARNING(LOG_TAG, "%s: Unknown power supply type\n",
                                 mChargerNames[i].string());
                }
            }
        }
    }

    logthis = !healthd_board_battery_update(&props);

    if (logthis) {
        char dmesgline[256];

        if (props.batteryPresent) {
            snprintf(dmesgline, sizeof(dmesgline),
                 "battery l=%d v=%d t=%s%d.%d h=%d st=%d",
                 props.batteryLevel, props.batteryVoltage,
                 props.batteryTemperature < 0 ? "-" : "",
                 abs(props.batteryTemperature / 10),
                 abs(props.batteryTemperature % 10), props.batteryHealth,
                 props.batteryStatus);

            if (!mHealthdConfig->batteryCurrentNowPath.isEmpty()) {
                int c = getIntField(mHealthdConfig->batteryCurrentNowPath);
                char b[20];

                snprintf(b, sizeof(b), " c=%d", c / 1000);
                strlcat(dmesgline, b, sizeof(dmesgline));
            }
        } else {
            snprintf(dmesgline, sizeof(dmesgline),
                 "battery none");
        }

        size_t len = strlen(dmesgline);
        snprintf(dmesgline + len, sizeof(dmesgline) - len, " chg=%s%s%s",
                 props.chargerAcOnline ? "a" : "",
                 props.chargerUsbOnline ? "u" : "",
                 props.chargerWirelessOnline ? "w" : "");

        log_time realtime(CLOCK_REALTIME);
        time_t t = realtime.tv_sec;
//.........这里部分代码省略.........

void BatteryMonitor::init(struct healthd_config *hc) {
    String8 path;
    char pval[PROPERTY_VALUE_MAX];

    mHealthdConfig = hc;
    DIR* dir = opendir(POWER_SUPPLY_SYSFS_PATH);
    if (dir == NULL) {
        KLOG_ERROR(LOG_TAG, "Could not open %s\n", POWER_SUPPLY_SYSFS_PATH);
    } else {
        struct dirent* entry;

        while ((entry = readdir(dir))) {
            const char* name = entry->d_name;

            if (!strcmp(name, ".") || !strcmp(name, ".."))
                continue;

            char buf[20];
            // Look for "type" file in each subdirectory
            path.clear();
            path.appendFormat("%s/%s/type", POWER_SUPPLY_SYSFS_PATH, name);
            switch(readPowerSupplyType(path)) {
            case ANDROID_POWER_SUPPLY_TYPE_AC:
            case ANDROID_POWER_SUPPLY_TYPE_USB:
            case ANDROID_POWER_SUPPLY_TYPE_WIRELESS:
                path.clear();
                path.appendFormat("%s/%s/online", POWER_SUPPLY_SYSFS_PATH, name);
                if (access(path.string(), R_OK) == 0)
                    mChargerNames.add(String8(name));
                break;

            case ANDROID_POWER_SUPPLY_TYPE_BATTERY:
                mBatteryDevicePresent = true;

                if (mHealthdConfig->batteryStatusPath.isEmpty()) {
                    path.clear();
                    path.appendFormat("%s/%s/status", POWER_SUPPLY_SYSFS_PATH,
                                      name);
                    if (access(path, R_OK) == 0)
                        mHealthdConfig->batteryStatusPath = path;
                }

                if (mHealthdConfig->batteryHealthPath.isEmpty()) {
                    path.clear();
                    path.appendFormat("%s/%s/health", POWER_SUPPLY_SYSFS_PATH,
                                      name);
                    if (access(path, R_OK) == 0)
                        mHealthdConfig->batteryHealthPath = path;
                }

                if (mHealthdConfig->batteryPresentPath.isEmpty()) {
                    path.clear();
                    path.appendFormat("%s/%s/present", POWER_SUPPLY_SYSFS_PATH,
                                      name);
                    if (access(path, R_OK) == 0)
                        mHealthdConfig->batteryPresentPath = path;
                }

                if (mHealthdConfig->batteryCapacityPath.isEmpty()) {
                    path.clear();
                    path.appendFormat("%s/%s/capacity", POWER_SUPPLY_SYSFS_PATH,
                                      name);
                    if (access(path, R_OK) == 0)
                        mHealthdConfig->batteryCapacityPath = path;
                }

                if (mHealthdConfig->batteryVoltagePath.isEmpty()) {
                    path.clear();
                    path.appendFormat("%s/%s/voltage_now",
                                      POWER_SUPPLY_SYSFS_PATH, name);
                    if (access(path, R_OK) == 0) {
                        mHealthdConfig->batteryVoltagePath = path;
                    } else {
                        path.clear();
                        path.appendFormat("%s/%s/batt_vol",
                                          POWER_SUPPLY_SYSFS_PATH, name);
                        if (access(path, R_OK) == 0)
                            mHealthdConfig->batteryVoltagePath = path;
                    }
                }

                if (mHealthdConfig->batteryCurrentNowPath.isEmpty()) {
                    path.clear();
                    path.appendFormat("%s/%s/current_now",
                                      POWER_SUPPLY_SYSFS_PATH, name);
                    if (access(path, R_OK) == 0)
                        mHealthdConfig->batteryCurrentNowPath = path;
                }

                if (mHealthdConfig->batteryCurrentAvgPath.isEmpty()) {
                    path.clear();
                    path.appendFormat("%s/%s/current_avg",
                                      POWER_SUPPLY_SYSFS_PATH, name);
                    if (access(path, R_OK) == 0)
                        mHealthdConfig->batteryCurrentAvgPath = path;
                }

                if (mHealthdConfig->batteryChargeCounterPath.isEmpty()) {
                    path.clear();
                    path.appendFormat("%s/%s/charge_counter",
//.........这里部分代码省略.........

bool BatteryMonitor::update(void) {
    bool logthis;

    props.chargerAcOnline = false;
    props.chargerUsbOnline = false;
    props.chargerWirelessOnline = false;
    props.batteryStatus = BATTERY_STATUS_UNKNOWN;
    props.batteryHealth = BATTERY_HEALTH_UNKNOWN;

    if (!mHealthdConfig->batteryPresentPath.isEmpty())
        props.batteryPresent = getBooleanField(mHealthdConfig->batteryPresentPath);
    else
        props.batteryPresent = mBatteryDevicePresent;

    props.batteryLevel = mBatteryFixedCapacity ?
        mBatteryFixedCapacity :
        getIntField(mHealthdConfig->batteryCapacityPath);
    props.batteryVoltage = getIntField(mHealthdConfig->batteryVoltagePath) / 1000;

    props.batteryTemperature = mBatteryFixedTemperature ?
        mBatteryFixedTemperature :
        getIntField(mHealthdConfig->batteryTemperaturePath);

    const int SIZE = 128;
    char buf[SIZE];
    String8 btech;

    if (readFromFile(mHealthdConfig->batteryStatusPath, buf, SIZE) > 0)
        props.batteryStatus = getBatteryStatus(buf);

    if (readFromFile(mHealthdConfig->batteryHealthPath, buf, SIZE) > 0)
        props.batteryHealth = getBatteryHealth(buf);

    if (readFromFile(mHealthdConfig->batteryTechnologyPath, buf, SIZE) > 0)
        props.batteryTechnology = String8(buf);

    // reinitialize the mChargerNames vector everytime there is an update
    String8 path;
    DIR* dir = opendir(POWER_SUPPLY_SYSFS_PATH);
    if (dir == NULL) {
        KLOG_ERROR(LOG_TAG, "Could not open %s\n", POWER_SUPPLY_SYSFS_PATH);
    } else {
        struct dirent* entry;
        // reconstruct the charger strings
        mChargerNames.clear();
        while ((entry = readdir(dir))) {
            const char* name = entry->d_name;

            if (!strcmp(name, ".") || !strcmp(name, ".."))
                continue;

            // Look for "type" file in each subdirectory
            path.clear();
            path.appendFormat("%s/%s/type", POWER_SUPPLY_SYSFS_PATH, name);
            switch(readPowerSupplyType(path)) {
            case ANDROID_POWER_SUPPLY_TYPE_BATTERY:
                break;
            default:
                path.clear();
                path.appendFormat("%s/%s/online", POWER_SUPPLY_SYSFS_PATH, name);
                if (access(path.string(), R_OK) == 0) {
                    mChargerNames.add(String8(name));
                    if (readFromFile(path, buf, SIZE) > 0) {
                        if (buf[0] != '0') {
                            path.clear();
                            path.appendFormat("%s/%s/type", POWER_SUPPLY_SYSFS_PATH,
                                              name);
                            switch(readPowerSupplyType(path)) {
                            case ANDROID_POWER_SUPPLY_TYPE_AC:
                                props.chargerAcOnline = true;
                                break;
                            case ANDROID_POWER_SUPPLY_TYPE_USB:
                                props.chargerUsbOnline = true;
                                break;
                            case ANDROID_POWER_SUPPLY_TYPE_WIRELESS:
                                props.chargerWirelessOnline = true;
                                break;
                            default:
                                KLOG_WARNING(LOG_TAG, "%s: Unknown power supply type\n",
                                             name);
                            }
                        }
                    }
                }
                break;
            } //switch
        } //while
        closedir(dir);
    }//else

    logthis = !healthd_board_battery_update(&props);

    if (logthis) {
        char dmesgline[256];

        if (props.batteryPresent) {
            snprintf(dmesgline, sizeof(dmesgline),
                 "battery l=%d v=%d t=%s%d.%d h=%d st=%d",
                 props.batteryLevel, props.batteryVoltage,
                 props.batteryTemperature < 0 ? "-" : "",
//.........这里部分代码省略.........

bool BatteryMonitor::update(void) {
    bool logthis;

    props.chargerAcOnline = false;
    props.chargerUsbOnline = false;
    props.chargerWirelessOnline = false;
    props.batteryStatus = BATTERY_STATUS_UNKNOWN;
    props.batteryHealth = BATTERY_HEALTH_UNKNOWN;

    if (!mHealthdConfig->batteryPresentPath.isEmpty())
        props.batteryPresent = getBooleanField(mHealthdConfig->batteryPresentPath);
    else
        props.batteryPresent = mBatteryDevicePresent;

    props.batteryLevel = mBatteryFixedCapacity ?
        mBatteryFixedCapacity :
        getIntField(mHealthdConfig->batteryCapacityPath);
    props.batteryVoltage = getIntField(mHealthdConfig->batteryVoltagePath) / 1000;

    props.batteryTemperature = mBatteryFixedTemperature ?
        mBatteryFixedTemperature :
        getIntField(mHealthdConfig->batteryTemperaturePath);

    const int SIZE = 128;
    char buf[SIZE];
    String8 btech;

    if (readFromFile(mHealthdConfig->batteryStatusPath, buf, SIZE) > 0)
        props.batteryStatus = getBatteryStatus(buf);

    if (readFromFile(mHealthdConfig->batteryHealthPath, buf, SIZE) > 0)
        props.batteryHealth = getBatteryHealth(buf);

    if (readFromFile(mHealthdConfig->batteryTechnologyPath, buf, SIZE) > 0)
        props.batteryTechnology = String8(buf);

    unsigned int i;

    for (i = 0; i < mChargerNames.size(); i++) {
        String8 path;
        path.appendFormat("%s/%s/online", POWER_SUPPLY_SYSFS_PATH,
                          mChargerNames[i].string());

        if (readFromFile(path, buf, SIZE) > 0) {
            if (buf[0] != '0') {
                path.clear();
                path.appendFormat("%s/%s/type", POWER_SUPPLY_SYSFS_PATH,
                                  mChargerNames[i].string());
                switch(readPowerSupplyType(path)) {
                case ANDROID_POWER_SUPPLY_TYPE_AC:
                    props.chargerAcOnline = true;
                    break;
                case ANDROID_POWER_SUPPLY_TYPE_USB:
                    props.chargerUsbOnline = true;
                    break;
                case ANDROID_POWER_SUPPLY_TYPE_WIRELESS:
                    props.chargerWirelessOnline = true;
                    break;
                default:
                    KLOG_WARNING(LOG_TAG, "%s: Unknown power supply type\n",
                                 mChargerNames[i].string());
                }
            }
        }
    }

    logthis = !healthd_board_battery_update(&props);

    if (logthis) {
        char dmesgline[256];

        if (props.batteryPresent) {
            snprintf(dmesgline, sizeof(dmesgline),
                 "battery l=%d v=%d t=%s%d.%d h=%d st=%d",
                 props.batteryLevel, props.batteryVoltage,
                 props.batteryTemperature < 0 ? "-" : "",
                 abs(props.batteryTemperature / 10),
                 abs(props.batteryTemperature % 10), props.batteryHealth,
                 props.batteryStatus);

            if (!mHealthdConfig->batteryCurrentNowPath.isEmpty()) {
                int c = getIntField(mHealthdConfig->batteryCurrentNowPath);
                char b[20];

                snprintf(b, sizeof(b), " c=%d", c / 1000);
                strlcat(dmesgline, b, sizeof(dmesgline));
            }
        } else {
            snprintf(dmesgline, sizeof(dmesgline),
                 "battery none");
        }

        KLOG_WARNING(LOG_TAG, "%s chg=%s%s%s\n", dmesgline,
                     props.chargerAcOnline ? "a" : "",
                     props.chargerUsbOnline ? "u" : "",
                     props.chargerWirelessOnline ? "w" : "");
    }

    healthd_mode_ops->battery_update(&props);
    return props.chargerAcOnline | props.chargerUsbOnline |
//.........这里部分代码省略.........

static void android_server_BatteryService_update(JNIEnv* env, jobject obj)
{
    setBooleanField(env, obj, gPaths.batteryPresentPath, gFieldIds.mBatteryPresent);

    setIntFieldMax(env, obj, gPaths.batteryCapacityPath, gFieldIds.mBatteryLevel, 100);
    setVoltageField(env, obj, gPaths.batteryVoltagePath, gFieldIds.mBatteryVoltage);
    setIntField(env, obj, gPaths.batteryTemperaturePath, gFieldIds.mBatteryTemperature);

    const int SIZE = 128;
    char buf[SIZE];

    if (readFromFile(gPaths.batteryStatusPath, buf, SIZE) > 0)
        env->SetIntField(obj, gFieldIds.mBatteryStatus, getBatteryStatus(buf));
    else
        env->SetIntField(obj, gFieldIds.mBatteryStatus,
                         gConstants.statusUnknown);

    if (readFromFile(gPaths.batteryHealthPath, buf, SIZE) > 0)
        env->SetIntField(obj, gFieldIds.mBatteryHealth, getBatteryHealth(buf));

    if (readFromFile(gPaths.batteryTechnologyPath, buf, SIZE) > 0)
        env->SetObjectField(obj, gFieldIds.mBatteryTechnology, env->NewStringUTF(buf));

    unsigned int i;
    String8 path;
    jboolean acOnline = false;
    jboolean usbOnline = false;
    jboolean wirelessOnline = false;

    for (i = 0; i < gChargerNames.size(); i++) {
        path.clear();
        path.appendFormat("%s/%s/online", POWER_SUPPLY_PATH,
                          gChargerNames[i].string());

        if (readFromFile(path, buf, SIZE) > 0) {
            if (buf[0] != '0') {
                path.clear();
                path.appendFormat("%s/%s/type", POWER_SUPPLY_PATH,
                                  gChargerNames[i].string());
                switch(readPowerSupplyType(path)) {
                case ANDROID_POWER_SUPPLY_TYPE_AC:
                    acOnline = true;
                    break;
                case ANDROID_POWER_SUPPLY_TYPE_USB:
                    usbOnline = true;
                    break;
                case ANDROID_POWER_SUPPLY_TYPE_WIRELESS:
                    wirelessOnline = true;
                    break;
                default:
                    ALOGW("%s: Unknown power supply type",
                          gChargerNames[i].string());
                }
            }
        }
    }

    env->SetBooleanField(obj, gFieldIds.mAcOnline, acOnline);
    env->SetBooleanField(obj, gFieldIds.mUsbOnline, usbOnline);
    env->SetBooleanField(obj, gFieldIds.mWirelessOnline, wirelessOnline);
}

void HDMIAudioCaps::getFmtsForAF(String8& fmts) {
    Mutex::Autolock _l(mLock);
    fmts.clear();

    // If the sink does not support basic audio, then it supports no audio.
    if (!mBasicAudioSupported) {
        ALOGI("ALSAFORMATS: basic audio not supported");
        return;
    }

    fmts.append("AUDIO_FORMAT_PCM_16_BIT");
    // TODO: when we can start to expect 20 and 24 bit audio modes coming from
    // AF, we need to implement support to enumerate those modes.

    // These names must match formats in android.media.AudioFormat
    for (size_t i = 0; i < mModes.size(); ++i) {
        switch (mModes[i].fmt) {
            case kFmtAC3:
                fmts.append("|AUDIO_FORMAT_AC3");
                break;
            case kFmtEAC3:
                fmts.append("|AUDIO_FORMAT_E_AC3");
                break;
            default:
                break;
        }
    }

#if ALSA_UTILS_PRINT_FORMATS
    ALOGI("ALSAFORMATS: formats = %s", fmts.string());

    for (size_t i = 0; i < mModes.size(); ++i) {
        ALOGI("ALSAFORMATS: ------- fmt[%d] = 0x%08X = %s",
            i, mModes[i].fmt, fmtToString(mModes[i].fmt));
        ALOGI("ALSAFORMATS:   comp_bitrate[%d] = 0x%08X = %d",
            i, mModes[i].comp_bitrate, mModes[i].comp_bitrate);
        ALOGI("ALSAFORMATS:   max_ch[%d] = 0x%08X = %d",
            i, mModes[i].max_ch, mModes[i].max_ch);
        ALOGI("ALSAFORMATS:   bps_bitmask[%d] = 0x%08X", i, mModes[i].bps_bitmask);
        uint32_t bpsm = mModes[i].bps_bitmask;
        while(bpsm) {
            uint32_t bpsm_next = bpsm & (bpsm - 1);
            uint32_t bpsm_single = bpsm ^ bpsm_next;
            if (bpsm_single) {
                ALOGI("ALSAFORMATS:      bits  = %d", bpsMaskToBPS(bpsm_single));
            }
            bpsm = bpsm_next;
        }
        ALOGI("ALSAFORMATS:   sr_bitmask[%d] = 0x%08X", i, mModes[i].sr_bitmask);
        uint32_t srs = mModes[i].sr_bitmask;
        while(srs) {
            uint32_t srs_next = srs & (srs - 1);
            uint32_t srs_single = srs ^ srs_next;
            if (srs_single) {
                ALOGI("ALSAFORMATS:      srate = %d", srMaskToSR(srs_single));
            }
            srs = srs_next;
        }
    }
#endif /* ALSA_UTILS_PRINT_FORMATS */
}