#include "PowerMeter.h"


PowerMeter* PowerMeter::uniqueInstanceMach = nullptr;
PowerMeter* PowerMeter::uniqueInstanceLight = nullptr;

PowerMeter* PowerMeter::MachInstance()
{
    if (!uniqueInstanceMach) {
        uniqueInstanceMach = new PowerMeter();
    }
    return uniqueInstanceMach;
}
PowerMeter* PowerMeter::LightInstance()
{
    if (!uniqueInstanceLight) {
        uniqueInstanceLight = new PowerMeter();
    }
    return uniqueInstanceLight;
}

PowerMeter::PowerMeter()
{

}
PowerMeter::~PowerMeter()
{

}

//int PowerMeter::GetValue(char *data, unsigned short data_len,float * Value)
int PowerMeter::GetValue(float * Value)
{
    int ret;
    char cmd[50];
    char revBuf[50] = {0};
    ::EnterCriticalSection(&mCsRead);


    memset(revData,0,4096);
    sprintf_s(cmd, "$POW\r\n");
    ret = SendCmd(reinterpret_cast<char*>(cmd), strlen(cmd) ,reinterpret_cast<unsigned char*>(revData), &revDataLen);
    if (ret == 0)
    {
        //revData[strlen(revData) - 2] = 0;
        memcpy_s(revBuf,50,revData,strlen(revData));
        for (int i=0;i<(int)strlen(revData);i++)
        {
            if ((revData[i] == '\r') || (revData[i] == '\n'))
                revBuf[i] = 0;
        }
        *Value = convert(revBuf);
    }
    ::LeaveCriticalSection(&mCsRead);
    return ret;
}
float PowerMeter::convert(char *num)
{
    //printf("开始转换%s\n", num);
    float num1 = 0.0, num2 = 0.0;
    int sign = 1;
    int exp = 1, cishu = 0;
    //表示e后面是正号还是负号，正号为1，负号为-1
    //cishu表示是几次饭
    char *p = num;
    if (*p == '-') {
        sign = -1;
        p++;
        //如果小数是复数
    }
    while (isdigit(*p)) {
        num1 = num1 * 10 + *p - '0';
        p++;
        //小数点前面的部分
    }
    //printf("num1:%f\n", num1);
    float i = 0.1;
    p++;
    while (isdigit(*p)) {
        num2 += i * (*p - '0');
        i *= 0.1;
        p++;
    }
    //小数点后面的部分
    //printf("num2:%f\n", num2);
    if (*p == 'e' || *p == 'E')
        p++;
    if (*p == '-') {
        exp = -1;
        p++;
    }
    else if (*p == '+')p++;

    while (*p != '\0') {
        cishu = cishu * 10 + *p - '0';
        p++;
    }
    //printf("cishu:%d\n", cishu);
    float result = sign * (num1 + num2);
    if (exp == -1) i = 0.1;
    else i = 10;
    for (int j = 0; j < cishu; j++) result *= i;
    return result;

}