Question

I’m trying to write a function that would give me an array of days that exists between two timestamps.

For example

getDays(int startTimestamp,int stopTimestamp);

the output would be

2011-11-05
2011-11-06
2011-11-07

Is there anyway of doing this in a clean way without having to do some heavy algo ?

I’m not familiar with C++ so I just want to make sure there is no function that could do this for me before I start writting a big function.

Cheers

Answer 1

Have a while loop

std::vector<std::string> dateList;
while ( startTimestamp < stopTimestamp )
{

    //Use strftime to convert startTimestamp to your format 
    // append to dateList
    //increment startTimestamp by 1 day depending on what unit it is
}

strftime documenation. If your units were time_t this is a specific example

std::vector<std::string> getDays(time_t startTimestamp,time_t stopTimestamp)
{
    std::vector<std::string> dateList;
    char buffer[256];

    while ( startTimestamp < stopTimestamp )
    {
        struct tm * timeinfo;
        timeinfo = localtime ( &startTimestamp );

        strftime (buffer,256,"%Y-%m-%d",timeinfo);

        dateList.push_back( buffer );

        startTimestamp += 24 * 60 * 60;
    }

    return dateList;
}