Unix2DateTime
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Function: integer DateTime2Unix(integer year,integer month,integer day,integer hour,integer minute,integer second);
Returns an integer comprising the date in number of seconds elapsed since 00:00 hours, Jan 1, 1970 UTC.
| • integer | year | – | range from 1970 to 2038 | |
| • integer | month | – | range from 1 to 12 | |
| • integer | day | – | range from 1 to 31 | |
| • integer | hour | – | range from 0 to 23 | |
| • integer | minute | – | range from 0 to 59 | |
| • integer | second | – | range from 0 to 59 |
Specification
<lsl>///////////////////////////////////////////////////////////////////// // Script Library Contribution by Flennan Roffo // Logic Scripted Products & Script Services // Peacock Park (183,226,69) // (c) 2007 - Flennan Roffo // // Distributed as GPL, donated to wiki.secondlife.com on 19 sep 2007 // // SCRIPT: Unix2DateTimev1.0.lsl // // FUNCTION: // Perform conversion from return value of llGetUnixTime() to // date and time strings and vice versa. // // USAGE: // list timelist=Unix2DateTime(llGetUnixTime()); // llSay(PUBLIC_CHANNEL, "Date: " + DateString(timelist); // displays date as DD-MON-YYYY // llSay(PUBLIC_CHANNEL, "Time: " + TimeString(timelist); // displays time as HH24:MI:SS /////////////////////////////////////////////////////////////////////
///////////////////////////// Unix Time conversion //////////////////
integer DAYS_PER_YEAR = 365; // Non leap year integer SECONDS_PER_YEAR = 31536000; // Non leap year integer SECONDS_PER_DAY = 86400; integer SECONDS_PER_HOUR = 3600; integer SECONDS_PER_MINUTE = 60;
list MonthNameList = [ "JAN", "FEB", "MAR", "APR", "MAY", "JUN",
"JUL", "AUG", "SEP", "OCT", "NOV", "DEC" ];
// This leap year test works for all years from 1901 to 2099 (yes, including 2000) // Which is more than enough for UnixTime computations, which only operate over the range [1970, 2038]. (Omei Qunhua) integer LeapYear( integer year) {
return !(year & 3);
}
integer DaysPerMonth(integer year, integer month) {
// Compact Days-Per-Month algorithm. Omei Qunhua. if (month == 2) return 28 + LeapYear(year); return 30 + ( (month + (month > 7) ) & 1); // Odd months up to July, and even months after July, have 31 days
}
integer DaysPerYear(integer year) {
return 365 + LeapYear(year);
}
/////////////////////////////////////////////////////////////////////////////////////// // Convert Unix time (integer) to a Date and Time string ///////////////////////////////////////////////////////////////////////////////////////
/////////////////////////////// Unix2DataTime() ///////////////////////////////////////
list Unix2DateTime(integer unixtime) {
integer days_since_1_1_1970 = unixtime / SECONDS_PER_DAY;
integer day = days_since_1_1_1970 + 1;
integer year = 1970;
integer days_per_year = DaysPerYear(year);
while (day > days_per_year)
{
day -= days_per_year;
++year;
days_per_year = DaysPerYear(year);
}
integer month = 1;
integer days_per_month = DaysPerMonth(year, month);
while (day > days_per_month)
{
day -= days_per_month;
if (++month > 12)
{
++year;
month = 1;
}
days_per_month = DaysPerMonth(year, month);
}
integer seconds_since_midnight = unixtime % SECONDS_PER_DAY; integer hour = seconds_since_midnight / SECONDS_PER_HOUR; integer second = seconds_since_midnight % SECONDS_PER_HOUR; integer minute = second / SECONDS_PER_MINUTE; second = second % SECONDS_PER_MINUTE; return [ year, month, day, hour, minute, second ];
}
///////////////////////////////// MonthName() ////////////////////////////
string MonthName(integer month) {
if (month >= 0 && month < 12)
return llList2String(MonthNameList, month);
else
return "";
}
///////////////////////////////// DateString() ///////////////////////////
string DateString(list timelist) {
integer year = llList2Integer(timelist,0); integer month = llList2Integer(timelist,1); integer day = llList2Integer(timelist,2); return (string)day + "-" + MonthName(month - 1) + "-" + (string)year;
}
///////////////////////////////// TimeString() ////////////////////////////
string TimeString(list timelist) {
string hourstr = llGetSubString ( (string) (100 + llList2Integer(timelist, 3) ), -2, -1); string minutestr = llGetSubString ( (string) (100 + llList2Integer(timelist, 4) ), -2, -1); string secondstr = llGetSubString ( (string) (100 + llList2Integer(timelist, 5) ), -2, -1); return hourstr + ":" + minutestr + ":" + secondstr;
}
/////////////////////////////////////////////////////////////////////////////// // Convert a date and time to a Unix time integer ///////////////////////////////////////////////////////////////////////////////
////////////////////////// DateTime2Unix() ////////////////////////////////////
integer DateTime2Unix(integer year, integer month, integer day, integer hour, integer minute, integer second) { integer time = 0; integer yr = 1970; integer mt = 1; integer days;
while(yr < year) { days = DaysPerYear(yr++); time += days * SECONDS_PER_DAY; }
while (mt < month) { days = DaysPerMonth(year, mt++); time += days * SECONDS_PER_DAY; }
days = day - 1; time += days * SECONDS_PER_DAY; time += hour * SECONDS_PER_HOUR; time += minute * SECONDS_PER_MINUTE; time += second;
return time; } ////////////////////////////////////////////// // End Unix2DateTimev1.0.lsl //////////////////////////////////////////////</lsl>
Example
Trivial example to display data and time converted from system time when touched. <lsl>default {
touch_start(integer total_number)
{
llOwnerSay("Date: " + DateString(Unix2DateTime(llGetUnixTime()))); // displays date as DD-MON-YYYY
llOwnerSay("Time: " + TimeString(Unix2DateTime(llGetUnixTime()))); // displays time as HH24:MI:SS
}
}</lsl>