bool convert_unixtime_from_option_arg()

in src/string_util.cpp [358:405]

• 48 lines of code
• 20 McCabe index (conditional complexity)

bool convert_unixtime_from_option_arg(const char* argv, time_t& unixtime)
{
    if(!argv){
      return false;
    }
    unixtime = 0;
    const char* ptmp;
    int         last_unit_type = 0;       // unit flag.
    bool        is_last_number;
    time_t      tmptime;
    for(ptmp = argv, is_last_number = true, tmptime = 0; ptmp && *ptmp; ++ptmp){
        if('0' <= *ptmp && *ptmp <= '9'){
            tmptime        *= 10;
            tmptime        += static_cast<time_t>(*ptmp - '0');
            is_last_number  = true;
        }else if(is_last_number){
            if('Y' == *ptmp && 1 > last_unit_type){
                unixtime      += (tmptime * (60 * 60 * 24 * 365));   // average 365 day / year
                last_unit_type = 1;
            }else if('M' == *ptmp && 2 > last_unit_type){
                unixtime      += (tmptime * (60 * 60 * 24 * 30));    // average 30 day / month
                last_unit_type = 2;
            }else if('D' == *ptmp && 3 > last_unit_type){
                unixtime      += (tmptime * (60 * 60 * 24));
                last_unit_type = 3;
            }else if('h' == *ptmp && 4 > last_unit_type){
                unixtime      += (tmptime * (60 * 60));
                last_unit_type = 4;
            }else if('m' == *ptmp && 5 > last_unit_type){
                unixtime      += (tmptime * 60);
                last_unit_type = 5;
            }else if('s' == *ptmp && 6 > last_unit_type){
                unixtime      += tmptime;
                last_unit_type = 6;
            }else{
                return false;
            }
            tmptime        = 0;
            is_last_number = false;
        }else{
            return false;
        }
    }
    if(is_last_number){
        return false;
    }
    return true;
}