CLIte/clite/libs/libtime.js

clite.libs.data = function() {

clite.libs.load('libtime','time',function(io,env) {
	var data = {
		days:['Sun','Mon','Tue','Wed','Thu','Fri','Sat'],
		months:['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec'],
		days_l:['Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday'],
		months_l:['January','February','March','April','May','June','July','August','September','October','November','December'],
		mdays:[31,28,31,30,31,30,31,31,30,31,30,31]
	}
	function getyDay(mon,mday,year) {
		var yday = 0;
		for (var i = 0; i<mon; i++) {
			yday += data.mdays[i];
		}
		year += 1900;
		// plus one for a leap year
		if (yday > 59 && (((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0)))
			yday++;
		return yday+mday;
	}
	function readTime() {
		var fd = clite.io.open(io.pid,'/dev/time',clite.io.flags.O_RDONLY|clite.io.flags.O_SYNC);
		if (!fd)
			return 0;
		var t = clite.io.readAll(io.pid,fd);
		if (!t) {
			t = '0';
		}else{
			t = t.toString();
		}
		clite.io.close(io.pid,fd);
		return parseInt(t,10);
	}
	function genTime(time,tz) {
		var t = time+tz;
		var tm = Object.create({
			tm_sec:0,	// seconds (0-60)
			tm_min:0,	// minutes (0-59)
			tm_hour:0,	// hour (0-23)
			tm_mday:0,	// day of month (0-31)
			tm_mon:0,	// month of year (0-11)
			tm_year:0,	// years since 1900
			tm_wday:0,	// day of week (0-6, sunday = 0)
			tm_yday:0,	// day of year (0-365)
			tm_isdst:0	// 1 if daylight savings
		});

		var td = new Date(t*1000);

		tm.tm_sec = td.getUTCSeconds();
		tm.tm_min = td.getUTCMinutes();
		tm.tm_hour = td.getUTCHours();
		tm.tm_mday = td.getUTCDate();
		tm.tm_mon = td.getUTCMonth();
		tm.tm_year = td.getUTCFullYear()-1900;
		tm.tm_wday = td.getUTCDay();
		tm.tm_yday = getyDay(tm.tm_mon,tm.tm_mday,tm.tm_year);

		return tm;
	}
	function getDTStr(fmt,tm) {
		var parts = fmt.split('%');
		var out = '';
		var skip = false;
		parts.forEach(function(part,i) {
			if (part == '') {
				if (i != 0) {
					out += '%';
					skip = true;
				}
				return;
			}
			if (skip || i == 0) {
				out += part;
				skip = false;
				return;
			}
			var o = part.substring(0,1);
			var e = part.substring(1);
			switch (o) {
			case 'a':	//Locale's abbreviated weekday name.
				out += data.days[tm.tm_wday];
				break;
			case 'A':	//Locale's full weekday name.
				out += data.days_l[tm.tm_wday];
				break;
			case 'h':
			case 'b':	//Locale's abbreviated month name.
				out += data.months[tm.tm_mon];
				break;
			case 'B':	//Locale's full month name.
				out += data.months_l[tm.tm_mon];
				break;
			case 'c':	//Locale's appropriate date and time representation.
				out += getDTStr('%a %d %b %Y %H:%M:%S',tm);
				break;
			case 'C':	//Century (a year divided by 100 and truncated to an integer) as a decimal number [00,99].
				var y = tm.tm_year+1900;
				out += (y/100).toFixed(0);
				break;
			case 'd':	//Day of the month as a decimal number [01,31].
				out += (tm.tm_mday).toFixed(0).padStart(2,'0');
				break;
			case 'D':	//Date in the format mm/dd/yy.
				out += getDTStr('%M/%D/%y',tm);
				break;
			case 'e':	//Day of the month as a decimal number [1,31] in a two-digit field with leading <space> character fill.
				out += (tm.tm_mday).toFixed(0).padStart(2,' ');
				break;
			case 'H':	//Hour (24-hour clock) as a decimal number [00,23].
				out += (tm.tm_hour).toFixed(0).padStart(2,'0');
				break;
			case 'I':	//Hour (12-hour clock) as a decimal number [01,12].
				out += (tm.tm_hour%12).toFixed(0).padStart(2,'0');
				break;
			case 'j':	//Day of the year as a decimal number [001,366].
				out += (tm.tm_yday).toFixed(0).padStart(3,'0');
				break;
			case 'm':	//Month as a decimal number [01,12].
				out += (tm.tm_mon+1).toFixed(0).padStart(2,'0');
				break;
			case 'M':	//Minute as a decimal number [00,59].
				out += (tm.tm_min).toFixed(0).padStart(2,'0');
				break;
			case 'n':	//A <newline>.
				out += '\n';
				break;
			case 'p':	//Locale's equivalent of either AM or PM.
				if (tm.tm_hour >11) {
					out += 'PM';
				}else{
					out += 'AM';
				}
				break;
			case 'r':	//12-hour clock time [01,12] using the AM/PM notation; in the POSIX locale, this shall be equivalent to %I : %M : %S %p.
				out += getDTStr('%I:%M:%S%p',tm);
				break;
			case 's':
				out += time.mktime(tm).toFixed(0);
				break;
			case 'S':	//Seconds as a decimal number [00,60].
				out += tm.tm_sec.toFixed(0).padStart(2,'0');
				break;
			case 't':	//A <tab>.
				out += '\t';
				break;
			case 'T':	//24-hour clock time [00,23] in the format HH:MM:SS.
				out += getDTStr('%H:%M:%S',tm);
				break;
			case 'u':	//Weekday as a decimal number [1,7] (1=Monday).
				if (tm.tm_wday < 1) {
					out += '7';
				}else{
					out += tm.tm_wday.toFixed(0);
				}
				break;
			case 'U':	//Week of the year (Sunday as the first day of the week) as a decimal number [00,53]. All days in a new year preceding the first Sunday shall be considered to be in week 0.
				// TODO: this
				break;
			case 'V':	//Week of the year (Monday as the first day of the week) as a decimal number [01,53]. If the week containing January 1 has four or more days in the new year, then it shall be considered week 1; otherwise, it shall be the last week of the previous year, and the next week shall be week 1.
				// TODO: this
				break;
			case 'w':	//Weekday as a decimal number [0,6] (0=Sunday).
				out += tm.tm_wday.toFixed(0);
				break;
			case 'W':	//Week of the year (Monday as the first day of the week) as a decimal number [00,53]. All days in a new year preceding the first Monday shall be considered to be in week 0.
				// TODO: this
				break;
			case 'x':	//Locale's appropriate date representation.
				out += getDTStr('%d/%m/%Y',tm);
				break;
			case 'X':	//Locale's appropriate time representation.
				out += getDTStr('%H:%M:%S',tm);
				break;
			case 'y':	//Year within century [00,99].
				out += (tm.tm_year+1900).toFixed(0).substring(2);
				break;
			case 'Y':	//Year with century as a decimal number.
				out += (tm.tm_year+1900).toFixed(0);
				break;
			case 'Z':	//Timezone name, or no characters if no timezone is determinable.
				break;
			default:;
			}
			out += e;
		});
		return out;
	}

	//

return Object.create({

	asctime:function(timeptr) {
		return getDTStr('%a %d %b %T %Y',timeptr);
	},
	ctime:function(time) {
		var tm = this.localtime(time);
		return this.asctime(tm);
	},
	gmtime:function(time) {
		return genTime(time,0);
	},
	localtime:function(time) {
		// TODO: fill in tz with seconds offset for current timezone
		var tz = 0;
		return genTime(time,tz);
	},
	mktime:function(timeptr) {
		var t = getDTStr('%a %d %b %T %Y %Z',timeptr);
		return parseInt(Math.floor((new Date(t)).getTime()/1000.0).toFixed(0));
	},
	strftime:function(fmt,timeptr) {
		return getDTStr(fmt,timeptr);
	},
	time:function() {
		var t = readTime();
		return parseInt(Math.floor(t/1000.0).toFixed(0)); // convert from milliseconds to seconds
	}

});

});

}