Method toStr

lib/home-assistant-integration/src/utils/HANumeric.cpp:170–214

}

uint16_t HANumeric::toStr(char* dst) const
{
    char* prefixCh = &dst[0];
    if (!_isSet || _value == 0) {
        *prefixCh = '0';
        return 1;
    }

    int64_t value = _value;
    const uint8_t numberLength = calculateSize();
    if (value < 0) {
        value *= -1;
        *prefixCh = '-';
        prefixCh++;
    }

    if (_precision > 0) {
        uint8_t i = _precision;
        char* dotPtr = prefixCh + 1;
        do {
            *prefixCh = '0';
            prefixCh++;
        } while(i-- > 0);

        *dotPtr = '.';
    }

    char* ch = &dst[numberLength - 1];
    char* lastCh = ch;
    char* dotPos = _precision > 0 ? &dst[numberLength - 1 - _precision] : nullptr;

    while (value != 0) {
        if (ch == dotPos) {
            *dotPos = '.';
            ch--;
            continue;
        }

        *ch = (value % 10) + '0';
        value /= 10;
        ch--;
    }

    return lastCh - &dst[0] + 1;
}