Date time format in delimited text files

// timeStamp is, e.g., "[2020](236)19:35:11.981.685.000 0x0073BBFE  0xDB6BBEDA  0x00000107  0xDCA0  0xF7E3"
// Function result is Igor date/time value
// Example: Print ParseTimeStamp("[2020](236)19:35:11.981.685.000   0x0073BBFE  0xDB6BBEDA  0x00000107  0xDCA0  0xF7E3")
Function ParseTimeStamp(String timestamp)
    int year, dayOfYear, hour, minute, second, fracSecond
    String formatStr = "[%d](%d)%d:%d:%d.%d"
    sscanf timestamp, formatStr, year, dayOfYear, hour, minute, second, fracSecond
    // Print year, dayOfYear, hour, minute, second, fracSecond  // For debugging only
    
    double dt = Date2Secs(year, 1, 1)
    dt += dayOfYear*24*3600
    dt += 3600*hour + 60*minute + second + fracSecond/1000
    
    // Print Secs2Date(dt,-2) + "T" + Secs2Time(dt,3,3) // For debugging only
    
    return dt
End

function getDateTime(s)
    string s
    variable year, day, hours, minutes, seconds
    sscanf s, "[%d](%d)%d:%d:%g", year, day, hours, minutes, seconds
    variable oneminute = 60
    variable onehour = 60 * oneminute
    variable oneday = 24 * onehour
    return date2secs(year, 1, 1) + day*oneday + hours*onehour + minutes*oneminute + seconds
end