TermApp/mpmaster/src/main/cpp/mpmaster.cpp

// Write C++ code here.
//
// Do not forget to dynamically load the C++ library into your application.
//
// For instance,
//
// In MainActivity.java:
//    static {
//       System.loadLibrary("mpmaster");
//    }
//
// Or, in MainActivity.kt:
//    companion object {
//      init {
//         System.loadLibrary("mpmaster")
//      }
//    }
#include <jni.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/system_properties.h>

#include <Client/Database.h>

#define IOT_PARAM_WRITE 0xAE
#define IOT_PARAM_READ 0xAF
#define MAX_STRING_LEN 32

#define PATH_MPAPP_STATS    "/sdcard/com.xypower.mpapp/data/stats/"

typedef struct
{
    int cmd;
    int value;
    int result;
    long value2;
    char str[MAX_STRING_LEN];
}IOT_PARAM;

extern "C" JNIEXPORT jint JNICALL
Java_com_xypower_mpmaster_MpMasterService_getInt(JNIEnv* env, jclass cls, jint cmd) {
    int fd = open("/dev/mtkgpioctrl", O_RDONLY);
    // LOGE("get_int fd=%d,cmd=%d\r\n",fd, cmd);
    if( fd > 0 )
    {
        IOT_PARAM param;
        param.cmd = cmd;
        ioctl(fd, IOT_PARAM_READ, &param);
#ifdef _DEBUG
        ALOGI("getInt cmd=%d,value=%d,result=%d\r\n",param.cmd, param.value, param.result);
#endif
        close(fd);
        return param.value;
    }
    return -1;
}

extern "C" JNIEXPORT jintArray JNICALL
Java_com_xypower_mpmaster_MpMasterService_getStats(JNIEnv* env, jclass cls, jlong ts) {
    std::string path = PATH_MPAPP_STATS;
    path += std::to_string(ts);

    FILE* file = fopen(path.c_str(), "r");
    if (file == NULL)
    {
        return NULL;
    }

    MP_STATS stats = { 0 };
    size_t length = fread(&stats, 1, sizeof(stats), file);
    fclose(file);
    if (length != sizeof(stats))
    {
        return NULL;
    }

    size_t intLength = sizeof(stats) / sizeof(jint);
    jintArray result = env->NewIntArray(intLength);
    env->SetIntArrayRegion(result, 0, intLength, (const jint*)&stats);
    return result;

}


extern "C" JNIEXPORT jstring JNICALL
Java_com_xypower_mpmaster_MpMasterService_getSystemProperty(
        JNIEnv* env,
        jclass cls, jstring key) {

    const char *keyStr = env->GetStringUTFChars(key, 0);

    char value[PROP_VALUE_MAX] = { 0 };
    __system_property_get(keyStr, value);

    env->ReleaseStringUTFChars(key, keyStr);

    return env->NewStringUTF(value);
}