[TEP-COMMIT] [CVS admin] use adodb functions that take care of dates pre 1970

Commit in admin/admin/external/adodb on MAIN

adodb-time.inc.php +954 added 1.1

use adodb functions that take care of dates pre 1970

----------

admin /admin /external /adodb

adodb-time.inc.php added at 1.1

diff -N adodb-time.inc.php
--- /dev/null Fri Jul 23 01:34:31 2004
+++ /tmp/cvsAAAStaiMh Fri Jul 23 01:34:31 2004
@@ -0,0 +1,954 @@

+<?php
+/**
+ADOdb Date Library, part of the ADOdb abstraction library
+Download: http://php.weblogs.com/adodb_date_time_library
+
+PHP native date functions use integer timestamps for computations.
+Because of this, dates are restricted to the years 1901-2038 on Unix
+and 1970-2038 on Windows due to integer overflow for dates beyond
+those years. This library overcomes these limitations by replacing the
+native function's signed integers (normally 32-bits) with PHP floating
+point numbers (normally 64-bits).
+
+Dates from 100 A.D. to 3000 A.D. and later
+have been tested. The minimum is 100 A.D. as <100 will invoke the
+2 => 4 digit year conversion. The maximum is billions of years in the
+future, but this is a theoretical limit as the computation of that year
+would take too long with the current implementation of adodb_mktime().
+
+This library replaces native functions as follows:
+
+<pre>
+ getdate() with adodb_getdate()
+ date() with adodb_date()
+ gmdate() with adodb_gmdate()
+ mktime() with adodb_mktime()
+ gmmktime() with adodb_gmmktime()
+</pre>
+
+The parameters are identical, except that adodb_date() accepts a subset
+of date()'s field formats. Mktime() will convert from local time to GMT,
+and date() will convert from GMT to local time, but daylight savings is
+not handled currently.
+
+This library is independant of the rest of ADOdb, and can be used
+as standalone code.
+
+PERFORMANCE
+
+For high speed, this library uses the native date functions where
+possible, and only switches to PHP code when the dates fall outside
+the 32-bit signed integer range.
+
+GREGORIAN CORRECTION
+
+Pope Gregory shortened October of A.D. 1582 by ten days. Thursday,
+October 4, 1582 (Julian) was followed immediately by Friday, October 15,
+1582 (Gregorian).
+
+Since 0.06, we handle this correctly, so:
+
+adodb_mktime(0,0,0,10,15,1582) - adodb_mktime(0,0,0,10,4,1582)
+ == 24 * 3600 (1 day)
+
+=============================================================================
+
+COPYRIGHT
+
+(c) 2003 John Lim and released under BSD-style license except for code by jackbbs,
+which includes adodb_mktime, adodb_get_gmt_diff, adodb_is_leap_year
+and originally found at http://www.php.net/manual/en/function.mktime.php
+
+=============================================================================
+
+BUG REPORTS
+
+These should be posted to the ADOdb forums at
+
+ http://phplens.com/lens/lensforum/topics.php?id=4
+
+=============================================================================
+
+FUNCTION DESCRIPTIONS
+
+
+FUNCTION adodb_getdate($date=false)
+
+Returns an array containing date information, as getdate(), but supports
+dates greater than 1901 to 2038.
+
+
+FUNCTION adodb_date($fmt, $timestamp = false)
+
+Convert a timestamp to a formatted local date. If $timestamp is not defined, the
+current timestamp is used. Unlike the function date(), it supports dates
+outside the 1901 to 2038 range.
+
+The format fields that adodb_date supports:
+
+<pre>
+a - "am" or "pm"
+A - "AM" or "PM"
+d - day of the month, 2 digits with leading zeros; i.e. "01" to "31"
+D - day of the week, textual, 3 letters; e.g. "Fri"
+F - month, textual, long; e.g. "January"
+g - hour, 12-hour format without leading zeros; i.e. "1" to "12"
+G - hour, 24-hour format without leading zeros; i.e. "0" to "23"
+h - hour, 12-hour format; i.e. "01" to "12"
+H - hour, 24-hour format; i.e. "00" to "23"
+i - minutes; i.e. "00" to "59"
+j - day of the month without leading zeros; i.e. "1" to "31"
+l (lowercase 'L') - day of the week, textual, long; e.g. "Friday"
+L - boolean for whether it is a leap year; i.e. "0" or "1"
+m - month; i.e. "01" to "12"
+M - month, textual, 3 letters; e.g. "Jan"
+n - month without leading zeros; i.e. "1" to "12"
+O - Difference to Greenwich time in hours; e.g. "+0200"
+Q - Quarter, as in 1, 2, 3, 4
+r - RFC 822 formatted date; e.g. "Thu, 21 Dec 2000 16:01:07 +0200"
+s - seconds; i.e. "00" to "59"
+S - English ordinal suffix for the day of the month, 2 characters;
+ i.e. "st", "nd", "rd" or "th"
+t - number of days in the given month; i.e. "28" to "31"
+T - Timezone setting of this machine; e.g. "EST" or "MDT"
+U - seconds since the Unix Epoch (January 1 1970 00:00:00 GMT)
+w - day of the week, numeric, i.e. "0" (Sunday) to "6" (Saturday)
+Y - year, 4 digits; e.g. "1999"
+y - year, 2 digits; e.g. "99"
+z - day of the year; i.e. "0" to "365"
+Z - timezone offset in seconds (i.e. "-43200" to "43200").
+ The offset for timezones west of UTC is always negative,
+ and for those east of UTC is always positive.
+</pre>
+
+Unsupported:
+<pre>
+B - Swatch Internet time
+I (capital i) - "1" if Daylight Savings Time, "0" otherwise.
+W - ISO-8601 week number of year, weeks starting on Monday
+
+</pre>
+
+FUNCTION adodb_date2($fmt, $isoDateString = false)
+Same as adodb_date, but 2nd parameter accepts iso date, eg.
+
+ adodb_date2('d-M-Y H:i','2003-12-25 13:01:34');
+
+FUNCTION adodb_gmdate($fmt, $timestamp = false)
+
+Convert a timestamp to a formatted GMT date. If $timestamp is not defined, the
+current timestamp is used. Unlike the function date(), it supports dates
+outside the 1901 to 2038 range.
+
+
+FUNCTION adodb_mktime($hr, $min, $sec, $month, $day, $year)
+
+Converts a local date to a unix timestamp. Unlike the function mktime(), it supports
+dates outside the 1901 to 2038 range. Differs from mktime() in that all parameters
+are currently compulsory.
+
+FUNCTION adodb_gmmktime($hr, $min, $sec, $month, $day, $year)
+
+Converts a gmt date to a unix timestamp. Unlike the function gmmktime(), it supports
+dates outside the 1901 to 2038 range. Differs from gmmktime() in that all parameters
+are currently compulsory.
+
+=============================================================================
+
+NOTES
+
+Useful url for generating test timestamps:
+ http://www.4webhelp.net/us/timestamp.php
+
+Possible future optimizations include
+
+a. Using an algorithm similar to Plauger's in "The Standard C Library"
+(page 428, xttotm.c _Ttotm() function). Plauger's algorithm will not
+work outside 32-bit signed range, so i decided not to implement it.
+
+b. Iterate over a block of years (say 12) when searching for the
+correct year.
+
+c. Implement daylight savings, which looks awfully complicated, see
+ http://webexhibits.org/daylightsaving/
+
+
+CHANGELOG
+- 23 June 2004 0.14
+
+Allow you to define your own daylights savings function, adodb_daylight_sv.
+If the function is defined (somewhere in an include), then you can correct for daylights savings.
+
+In this example, we apply daylights savings in June or July, add one hour. This is extremely
+unrealistic as it does not take into account time-zone, geographic location, current year.
+
+function adodb_daylight_sv(&$arr, $is_gmt)
+{
+ if ($is_gmt) return;
+ $m = (integer) $arr['mon'];
+ if ($m == 6 || $m == 7) $arr['hours'] += 1;
+}
+
+This is only called by adodb_date() and not by adodb_mktime().
+
+The format of $arr is
+Array (
+ [seconds] => 0
+ [minutes] => 0
+ [hours] => 0
+ [mday] => 1
+ [mon] => 2
+ [year] => 2102
+ [yday] => 31
+ [leap] =>
+ [ndays] => 28 )
+
+
+- 28 Apr 2004 0.13
+Fixed adodb_date to properly support $is_gmt. Thx to Dimitar Angelov.
+
+- 20 Mar 2004 0.12
+Fixed month calculation error in adodb_date. 2102-June-01 appeared as 2102-May-32.
+
+- 26 Oct 2003 0.11
+Because of daylight savings problems (some systems apply daylight savings to
+January!!!), changed adodb_get_gmt_diff() to ignore daylight savings.
+
+- 9 Aug 2003 0.10
+Fixed bug with dates after 2038.
+See http://phplens.com/lens/lensforum/msgs.php?id=6980
+
+- 1 July 2003 0.09
+Added support for Q (Quarter).
+Added adodb_date2(), which accepts ISO date in 2nd param
+
+- 3 March 2003 0.08
+Added support for 'S' adodb_date() format char. Added constant ADODB_ALLOW_NEGATIVE_TS
+if you want PHP to handle negative timestamps between 1901 to 1969.
+
+- 27 Feb 2003 0.07
+All negative numbers handled by adodb now because of RH 7.3+ problems.
+See http://bugs.php.net/bug.php?id=20048&edit=2
+
+- 4 Feb 2003 0.06
+Fixed a typo, 1852 changed to 1582! This means that pre-1852 dates
+are now correctly handled.
+
+- 29 Jan 2003 0.05
+
+Leap year checking differs under Julian calendar (pre 1582). Also
+leap year code optimized by checking for most common case first.
+
+We also handle month overflow correctly in mktime (eg month set to 13).
+
+Day overflow for less than one month's days is supported.
+
+- 28 Jan 2003 0.04
+
+Gregorian correction handled. In PHP5, we might throw an error if
+mktime uses invalid dates around 5-14 Oct 1582. Released with ADOdb 3.10.
+Added limbo 5-14 Oct 1582 check, when we set to 15 Oct 1582.
+
+- 27 Jan 2003 0.03
+
+Fixed some more month problems due to gmt issues. Added constant ADODB_DATE_VERSION.
+Fixed calculation of days since start of year for <1970.
+
+- 27 Jan 2003 0.02
+
+Changed _adodb_getdate() to inline leap year checking for better performance.
+Fixed problem with time-zones west of GMT +0000.
+
+- 24 Jan 2003 0.01
+
+First implementation.
+*/
+
+
+/* Initialization */
+
+/*
+ Version Number
+*/
+define('ADODB_DATE_VERSION',0.14);
+
+/*
+ We check for Windows as only +ve ints are accepted as dates on Windows.
+
+ Apparently this problem happens also with Linux, RH 7.3 and later!
+
+ glibc-2.2.5-34 and greater has been changed to return -1 for dates <
+ 1970. This used to work. The problem exists with RedHat 7.3 and 8.0
+ echo (mktime(0, 0, 0, 1, 1, 1960)); // prints -1
+
+ References:
+ http://bugs.php.net/bug.php?id=20048&edit=2
+ http://lists.debian.org/debian-glibc/2002/debian-glibc-200205/msg00010.html
+*/
+
+if (!defined('ADODB_ALLOW_NEGATIVE_TS')) define('ADODB_NO_NEGATIVE_TS',1);
+
+function adodb_date_test_date($y1,$m)
+{
+ //print " $y1/$m ";
+ $t = adodb_mktime(0,0,0,$m,13,$y1);
+ if ("$y1-$m-13 00:00:00" != adodb_date('Y-n-d H:i:s',$t)) {
+ print "<b>$y1 error</b><br>";
+ return false;
+ }
+ return true;
+}
+/**
+ Test Suite
+*/
+function adodb_date_test()
+{
+
+ error_reporting(E_ALL);
+ print "<h4>Testing adodb_date and adodb_mktime. version=".ADODB_DATE_VERSION. "</h4>";
+ @set_time_limit(0);
+ $fail = false;
+
+ // This flag disables calling of PHP native functions, so we can properly test the code
+ if (!defined('ADODB_TEST_DATES')) define('ADODB_TEST_DATES',1);
+
+ $t = adodb_mktime(0,0,0,6,1,2102);
+ if (!(adodb_date('Y-m-d',$t) == '2102-06-01')) print 'Error in '.adodb_date('Y-m-d',$t).'<br>';
+
+ $t = adodb_mktime(0,0,0,2,1,2102);
+ if (!(adodb_date('Y-m-d',$t) == '2102-02-01')) print 'Error in '.adodb_date('Y-m-d',$t).'<br>';
+
+
+ print "<p>Testing gregorian <=> julian conversion<p>";
+ $t = adodb_mktime(0,0,0,10,11,1492);
+ //http://www.holidayorigins.com/html/columbus_day.html - Friday check
+ if (!(adodb_date('D Y-m-d',$t) == 'Fri 1492-10-11')) print 'Error in Columbus landing<br>';
+
+ $t = adodb_mktime(0,0,0,2,29,1500);
+ if (!(adodb_date('Y-m-d',$t) == '1500-02-29')) print 'Error in julian leap years<br>';
+
+ $t = adodb_mktime(0,0,0,2,29,1700);
+ if (!(adodb_date('Y-m-d',$t) == '1700-03-01')) print 'Error in gregorian leap years<br>';
+
+ print adodb_mktime(0,0,0,10,4,1582).' ';
+ print adodb_mktime(0,0,0,10,15,1582);
+ $diff = (adodb_mktime(0,0,0,10,15,1582) - adodb_mktime(0,0,0,10,4,1582));
+ if ($diff != 3600*24) print " <b>Error in gregorian correction = ".($diff/3600/24)." days </b><br>";
+
+ print " 15 Oct 1582, Fri=".(adodb_dow(1582,10,15) == 5 ? 'Fri' : '<b>Error</b>')."<br>";
+ print " 4 Oct 1582, Thu=".(adodb_dow(1582,10,4) == 4 ? 'Thu' : '<b>Error</b>')."<br>";
+
+ print "<p>Testing overflow<p>";
+
+ $t = adodb_mktime(0,0,0,3,33,1965);
+ if (!(adodb_date('Y-m-d',$t) == '1965-04-02')) print 'Error in day overflow 1 <br>';
+ $t = adodb_mktime(0,0,0,4,33,1971);
+ if (!(adodb_date('Y-m-d',$t) == '1971-05-03')) print 'Error in day overflow 2 <br>';
+ $t = adodb_mktime(0,0,0,1,60,1965);
+ if (!(adodb_date('Y-m-d',$t) == '1965-03-01')) print 'Error in day overflow 3 '.adodb_date('Y-m-d',$t).' <br>';
+ $t = adodb_mktime(0,0,0,12,32,1965);
+ if (!(adodb_date('Y-m-d',$t) == '1966-01-01')) print 'Error in day overflow 4 '.adodb_date('Y-m-d',$t).' <br>';
+ $t = adodb_mktime(0,0,0,12,63,1965);
+ if (!(adodb_date('Y-m-d',$t) == '1966-02-01')) print 'Error in day overflow 5 '.adodb_date('Y-m-d',$t).' <br>';
+ $t = adodb_mktime(0,0,0,13,3,1965);
+ if (!(adodb_date('Y-m-d',$t) == '1966-01-03')) print 'Error in mth overflow 1 <br>';
+
+ print "Testing 2-digit => 4-digit year conversion<p>";
+ if (adodb_year_digit_check(00) != 2000) print "Err 2-digit 2000<br>";
+ if (adodb_year_digit_check(10) != 2010) print "Err 2-digit 2010<br>";
+ if (adodb_year_digit_check(20) != 2020) print "Err 2-digit 2020<br>";
+ if (adodb_year_digit_check(30) != 2030) print "Err 2-digit 2030<br>";
+ if (adodb_year_digit_check(40) != 1940) print "Err 2-digit 1940<br>";
+ if (adodb_year_digit_check(50) != 1950) print "Err 2-digit 1950<br>";
+ if (adodb_year_digit_check(90) != 1990) print "Err 2-digit 1990<br>";
+
+ // Test string formating
+ print "<p>Testing date formating</p>";
+ $fmt = '\d\a\t\e T Y-m-d H:i:s a A d D F g G h H i j l L m M n O \R\F\C822 r s t U w y Y z Z 2003';
+ $s1 = date($fmt,0);
+ $s2 = adodb_date($fmt,0);
+ if ($s1 != $s2) {
+ print " date() 0 failed<br>$s1<br>$s2<br>";
+ }
+ flush();
+ for ($i=100; --$i > 0; ) {
+
+ $ts = 3600.0*((rand()%60000)+(rand()%60000))+(rand()%60000);
+ $s1 = date($fmt,$ts);
+ $s2 = adodb_date($fmt,$ts);
+ //print "$s1 <br>$s2 <p>";
+ $pos = strcmp($s1,$s2);
+
+ if (($s1) != ($s2)) {
+ for ($j=0,$k=strlen($s1); $j < $k; $j++) {
+ if ($s1[$j] != $s2[$j]) {
+ print substr($s1,$j).' ';
+ break;
+ }
+ }
+ print "<b>Error date(): $ts<br><pre>
+&nbsp; \"$s1\" (date len=".strlen($s1).")
+&nbsp; \"$s2\" (adodb_date len=".strlen($s2).")</b></pre><br>";
+ $fail = true;
+ }
+
+ $a1 = getdate($ts);
+ $a2 = adodb_getdate($ts);
+ $rez = array_diff($a1,$a2);
+ if (sizeof($rez)>0) {
+ print "<b>Error getdate() $ts</b><br>";
+ print_r($a1);
+ print "<br>";
+ print_r($a2);
+ print "<p>";
+ $fail = true;
+ }
+ }
+
+ // Test generation of dates outside 1901-2038
+ print "<p>Testing random dates between 100 and 4000</p>";
+ adodb_date_test_date(100,1);
+ for ($i=100; --$i >= 0;) {
+ $y1 = 100+rand(0,1970-100);
+ $m = rand(1,12);
+ adodb_date_test_date($y1,$m);
+
+ $y1 = 3000-rand(0,3000-1970);
+ adodb_date_test_date($y1,$m);
+ }
+ print '<p>';
+ $start = 1960+rand(0,10);
+ $yrs = 12;
+ $i = 365.25*86400*($start-1970);
+ $offset = 36000+rand(10000,60000);
+ $max = 365*$yrs*86400;
+ $lastyear = 0;
+
+ // we generate a timestamp, convert it to a date, and convert it back to a timestamp
+ // and check if the roundtrip broke the original timestamp value.
+ print "Testing $start to ".($start+$yrs).", or $max seconds, offset=$offset: ";
+
+ for ($max += $i; $i < $max; $i += $offset) {
+ $ret = adodb_date('m,d,Y,H,i,s',$i);
+ $arr = explode(',',$ret);
+ if ($lastyear != $arr[2]) {
+ $lastyear = $arr[2];
+ print " $lastyear ";
+ flush();
+ }
+ $newi = adodb_mktime($arr[3],$arr[4],$arr[5],$arr[0],$arr[1],$arr[2]);
+ if ($i != $newi) {
+ print "Error at $i, adodb_mktime returned $newi ($ret)";
+ $fail = true;
+ break;
+ }
+ }
+
+ if (!$fail) print "<p>Passed !</p>";
+ else print "<p><b>Failed</b> :-(</p>";
+}
+
+/**
+ Returns day of week, 0 = Sunday,... 6=Saturday.
+ Algorithm from PEAR::Date_Calc
+*/
+function adodb_dow($year, $month, $day)
+{
+/*
+Pope Gregory removed 10 days - October 5 to October 14 - from the year 1582 and
+proclaimed that from that time onwards 3 days would be dropped from the calendar
+every 400 years.
+
+Thursday, October 4, 1582 (Julian) was followed immediately by Friday, October 15, 1582 (Gregorian).
+*/
+ if ($year <= 1582) {
+ if ($year < 1582 ||
+ ($year == 1582 && ($month < 10 || ($month == 10 && $day < 15)))) $greg_correction = 3;
+ else
+ $greg_correction = 0;
+ } else
+ $greg_correction = 0;
+
+ if($month > 2)
+ $month -= 2;
+ else {
+ $month += 10;
+ $year--;
+ }
+
+ $day = ( floor((13 * $month - 1) / 5) +
+ $day + ($year % 100) +
+ floor(($year % 100) / 4) +
+ floor(($year / 100) / 4) - 2 *
+ floor($year / 100) + 77);
+
+ return (($day - 7 * floor($day / 7))) + $greg_correction;
+}
+
+
+/**
+ Checks for leap year, returns true if it is. No 2-digit year check. Also
+ handles julian calendar correctly.
+*/
+function _adodb_is_leap_year($year)
+{
+ if ($year % 4 != 0) return false;
+
+ if ($year % 400 == 0) {
+ return true;
+ // if gregorian calendar (>1582), century not-divisible by 400 is not leap
+ } else if ($year > 1582 && $year % 100 == 0 ) {
+ return false;
+ }
+
+ return true;
+}
+
+/**
+ checks for leap year, returns true if it is. Has 2-digit year check
+*/
+function adodb_is_leap_year($year)
+{
+ return _adodb_is_leap_year(adodb_year_digit_check($year));
+}
+
+/**
+ Fix 2-digit years. Works for any century.
+ Assumes that if 2-digit is more than 30 years in future, then previous century.
+*/
+function adodb_year_digit_check($y)
+{
+ if ($y < 100) {
+
+ $yr = (integer) date("Y");
+ $century = (integer) ($yr /100);
+
+ if ($yr%100 > 50) {
+ $c1 = $century + 1;
+ $c0 = $century;
+ } else {
+ $c1 = $century;
+ $c0 = $century - 1;
+ }
+ $c1 *= 100;
+ // if 2-digit year is less than 30 years in future, set it to this century
+ // otherwise if more than 30 years in future, then we set 2-digit year to the prev century.
+ if (($y + $c1) < $yr+30) $y = $y + $c1;
+ else $y = $y + $c0*100;
+ }
+ return $y;
+}
+
+/**
+ get local time zone offset from GMT
+*/
+function adodb_get_gmt_diff()
+{
+static $TZ;
+ if (isset($TZ)) return $TZ;
+
+ $TZ = mktime(0,0,0,1,2,1970,0) - gmmktime(0,0,0,1,2,1970,0);
+ return $TZ;
+}
+
+/**
+ Returns an array with date info.
+*/
+function adodb_getdate($d=false,$fast=false)
+{
+ if ($d === false) return getdate();
+ if (!defined('ADODB_TEST_DATES')) {
+ if ((abs($d) <= 0x7FFFFFFF)) { // check if number in 32-bit signed range
+ if (!defined('ADODB_NO_NEGATIVE_TS') || $d >= 0) // if windows, must be +ve integer
+ return @getdate($d);
+ }
+ }
+ return _adodb_getdate($d);
+}
+
+/**
+ Low-level function that returns the getdate() array. We have a special
+ $fast flag, which if set to true, will return fewer array values,
+ and is much faster as it does not calculate dow, etc.
+*/
+function _adodb_getdate($origd=false,$fast=false,$is_gmt=false)
+{
+ $d = $origd - ($is_gmt ? 0 : adodb_get_gmt_diff());
+
+ $_day_power = 86400;
+ $_hour_power = 3600;
+ $_min_power = 60;
+
+ if ($d < -12219321600) $d -= 86400*10; // if 15 Oct 1582 or earlier, gregorian correction
+
+ $_month_table_normal = array("",31,28,31,30,31,30,31,31,30,31,30,31);
+ $_month_table_leaf = array("",31,29,31,30,31,30,31,31,30,31,30,31);
+
+ if ($d < 0) {
+ $origd = $d;
+ // The valid range of a 32bit signed timestamp is typically from
+ // Fri, 13 Dec 1901 20:45:54 GMT to Tue, 19 Jan 2038 03:14:07 GMT
+ for ($a = 1970 ; --$a >= 0;) {
+ $lastd = $d;
+
+ if ($leaf = _adodb_is_leap_year($a)) {
+ $d += $_day_power * 366;
+ } else
+ $d += $_day_power * 365;
+ if ($d >= 0) {
+ $year = $a;
+ break;
+ }
+ }
+
+ $secsInYear = 86400 * ($leaf ? 366 : 365) + $lastd;
+
+ $d = $lastd;
+ $mtab = ($leaf) ? $_month_table_leaf : $_month_table_normal;
+ for ($a = 13 ; --$a > 0;) {
+ $lastd = $d;
+ $d += $mtab[$a] * $_day_power;
+ if ($d >= 0) {
+ $month = $a;
+ $ndays = $mtab[$a];
+ break;
+ }
+ }
+
+ $d = $lastd;
+ $day = $ndays + ceil(($d+1) / ($_day_power));
+
+ $d += ($ndays - $day+1)* $_day_power;
+ $hour = floor($d/$_hour_power);
+
+ } else {
+
+ for ($a = 1970 ;; $a++) {
+ $lastd = $d;
+
+ if ($leaf = _adodb_is_leap_year($a)) {
+ $d -= $_day_power * 366;
+ } else
+ $d -= $_day_power * 365;
+ if ($d < 0) {
+ $year = $a;
+ break;
+ }
+ }
+ $secsInYear = $lastd;
+ $d = $lastd;
+ $mtab = ($leaf) ? $_month_table_leaf : $_month_table_normal;
+ for ($a = 1 ; $a <= 12; $a++) {
+ $lastd = $d;
+ $d -= $mtab[$a] * $_day_power;
+ if ($d < 0) {
+ $month = $a;
+ $ndays = $mtab[$a];
+ break;
+ }
+ }
+ $d = $lastd;
+ $day = ceil(($d+1) / $_day_power);
+ $d = $d - ($day-1) * $_day_power;
+ $hour = floor($d /$_hour_power);
+ }
+
+ $d -= $hour * $_hour_power;
+ $min = floor($d/$_min_power);
+ $secs = $d - $min * $_min_power;
+ if ($fast) {
+ return array(
+ 'seconds' => $secs,
+ 'minutes' => $min,
+ 'hours' => $hour,
+ 'mday' => $day,
+ 'mon' => $month,
+ 'year' => $year,
+ 'yday' => floor($secsInYear/$_day_power),
+ 'leap' => $leaf,
+ 'ndays' => $ndays
+ );
+ }
+
+
+ $dow = adodb_dow($year,$month,$day);
+
+ return array(
+ 'seconds' => $secs,
+ 'minutes' => $min,
+ 'hours' => $hour,
+ 'mday' => $day,
+ 'wday' => $dow,
+ 'mon' => $month,
+ 'year' => $year,
+ 'yday' => floor($secsInYear/$_day_power),
+ 'weekday' => gmdate('l',$_day_power*(3+$dow)),
+ 'month' => gmdate('F',mktime(0,0,0,$month,2,1971)),
+ 0 => $origd
+ );
+}
+
+function adodb_gmdate($fmt,$d=false)
+{
+ return adodb_date($fmt,$d,true);
+}
+
+// accepts unix timestamp and iso date format in $d
+function adodb_date2($fmt, $d=false, $is_gmt=false)
+{
+ if ($d !== false) {
+ if (!preg_match(
+ "|^([0-9]{4})[-/\.]?([0-9]{1,2})[-/\.]?([0-9]{1,2})[ -]?(([0-9]{1,2}):?([0-9]{1,2}):?([0-9\.]{1,4}))?|",
+ ($d), $rr)) return adodb_date($fmt,false,$is_gmt);
+
+ if ($rr[1] <= 100 && $rr[2]<= 1) return adodb_date($fmt,false,$is_gmt);
+
+ // h-m-s-MM-DD-YY
+ if (!isset($rr[5])) $d = adodb_mktime(0,0,0,$rr[2],$rr[3],$rr[1]);
+ else $d = @adodb_mktime($rr[5],$rr[6],$rr[7],$rr[2],$rr[3],$rr[1]);
+ }
+
+ return adodb_date($fmt,$d,$is_gmt);
+}
+
+
+/**
+ Return formatted date based on timestamp $d
+*/
+function adodb_date($fmt,$d=false,$is_gmt=false)
+{
+ if ($d === false) return ($is_gmt)? @gmdate($fmt): @date($fmt);
+ if (!defined('ADODB_TEST_DATES')) {
+ if ((abs($d) <= 0x7FFFFFFF)) { // check if number in 32-bit signed range
+ if (!defined('ADODB_NO_NEGATIVE_TS') || $d >= 0) // if windows, must be +ve integer
+ return ($is_gmt)? @gmdate($fmt,$d): @date($fmt,$d);
+
+ }
+ }
+ $_day_power = 86400;
+
+ $arr = _adodb_getdate($d,true,$is_gmt);
+ if (function_exists('adodb_daylight_sv')) adodb_daylight_sv($arr, $is_gmt);
+
+ $year = $arr['year'];
+ $month = $arr['mon'];
+ $day = $arr['mday'];
+ $hour = $arr['hours'];
+ $min = $arr['minutes'];
+ $secs = $arr['seconds'];
+
+ $max = strlen($fmt);
+ $dates = '';
+
+ /*
+ at this point, we have the following integer vars to manipulate:
+ $year, $month, $day, $hour, $min, $secs
+ */
+ for ($i=0; $i < $max; $i++) {
+ switch($fmt[$i]) {
+ case 'T': $dates .= date('T');break;
+ // YEAR
+ case 'L': $dates .= $arr['leap'] ? '1' : '0'; break;
+ case 'r': // Thu, 21 Dec 2000 16:01:07 +0200
+
+ $dates .= gmdate('D',$_day_power*(3+adodb_dow($year,$month,$day))).', '
+ . ($day<10?' '.$day:$day) . ' '.date('M',mktime(0,0,0,$month,2,1971)).' '.$year.' ';
+
+ if ($hour < 10) $dates .= '0'.$hour; else $dates .= $hour;
+
+ if ($min < 10) $dates .= ':0'.$min; else $dates .= ':'.$min;
+
+ if ($secs < 10) $dates .= ':0'.$secs; else $dates .= ':'.$secs;
+
+ $gmt = adodb_get_gmt_diff();
+ $dates .= sprintf(' %s%04d',($gmt<0)?'+':'-',abs($gmt)/36); break;
+
+ case 'Y': $dates .= $year; break;
+ case 'y': $dates .= substr($year,strlen($year)-2,2); break;
+ // MONTH
+ case 'm': if ($month<10) $dates .= '0'.$month; else $dates .= $month; break;
+ case 'Q': $dates .= ($month+3)>>2; break;
+ case 'n': $dates .= $month; break;
+ case 'M': $dates .= date('M',mktime(0,0,0,$month,2,1971)); break;
+ case 'F': $dates .= date('F',mktime(0,0,0,$month,2,1971)); break;
+ // DAY
+ case 't': $dates .= $arr['ndays']; break;
+ case 'z': $dates .= $arr['yday']; break;
+ case 'w': $dates .= adodb_dow($year,$month,$day); break;
+ case 'l': $dates .= gmdate('l',$_day_power*(3+adodb_dow($year,$month,$day))); break;
+ case 'D': $dates .= gmdate('D',$_day_power*(3+adodb_dow($year,$month,$day))); break;
+ case 'j': $dates .= $day; break;
+ case 'd': if ($day<10) $dates .= '0'.$day; else $dates .= $day; break;
+ case 'S':
+ $d10 = $day % 10;
+ if ($d10 == 1) $dates .= 'st';
+ else if ($d10 == 2) $dates .= 'nd';
+ else if ($d10 == 3) $dates .= 'rd';
+ else $dates .= 'th';
+ break;
+
+ // HOUR
+ case 'Z':
+ $dates .= ($is_gmt) ? 0 : -adodb_get_gmt_diff(); break;
+ case 'O':
+ $gmt = ($is_gmt) ? 0 : adodb_get_gmt_diff();
+ $dates .= sprintf('%s%04d',($gmt<0)?'+':'-',abs($gmt)/36); break;
+
+ case 'H':
+ if ($hour < 10) $dates .= '0'.$hour;
+ else $dates .= $hour;
+ break;
+ case 'h':
+ if ($hour > 12) $hh = $hour - 12;
+ else {
+ if ($hour == 0) $hh = '12';
+ else $hh = $hour;
+ }
+
+ if ($hh < 10) $dates .= '0'.$hh;
+ else $dates .= $hh;
+ break;
+
+ case 'G':
+ $dates .= $hour;
+ break;
+
+ case 'g':
+ if ($hour > 12) $hh = $hour - 12;
+ else {
+ if ($hour == 0) $hh = '12';
+ else $hh = $hour;
+ }
+ $dates .= $hh;
+ break;
+ // MINUTES
+ case 'i': if ($min < 10) $dates .= '0'.$min; else $dates .= $min; break;
+ // SECONDS
+ case 'U': $dates .= $d; break;
+ case 's': if ($secs < 10) $dates .= '0'.$secs; else $dates .= $secs; break;
+ // AM/PM
+ // Note 00:00 to 11:59 is AM, while 12:00 to 23:59 is PM
+ case 'a':
+ if ($hour>=12) $dates .= 'pm';
+ else $dates .= 'am';
+ break;
+ case 'A':
+ if ($hour>=12) $dates .= 'PM';
+ else $dates .= 'AM';
+ break;
+ default:
+ $dates .= $fmt[$i]; break;
+ // ESCAPE
+ case "\\":
+ $i++;
+ if ($i < $max) $dates .= $fmt[$i];
+ break;
+ }
+ }
+ return $dates;
+}
+
+/**
+ Returns a timestamp given a GMT/UTC time.
+ Note that $is_dst is not implemented and is ignored.
+*/
+function adodb_gmmktime($hr,$min,$sec,$mon,$day,$year,$is_dst=false)
+{
+ return adodb_mktime($hr,$min,$sec,$mon,$day,$year,$is_dst,true);
+}
+
+/**
+ Return a timestamp given a local time. Originally by jackbbs.
+ Note that $is_dst is not implemented and is ignored.
+
+ Not a very fast algorithm - O(n) operation. Could be optimized to O(1).
+*/
+function adodb_mktime($hr,$min,$sec,$mon,$day,$year,$is_dst=false,$is_gmt=false)
+{
+ if (!defined('ADODB_TEST_DATES')) {
+ // for windows, we don't check 1970 because with timezone differences,
+ // 1 Jan 1970 could generate negative timestamp, which is illegal
+ if (!defined('ADODB_NO_NEGATIVE_TS') || ($year >= 1971))
+ if (1901 < $year && $year < 2038)
+ return $is_gmt?
+ @gmmktime($hr,$min,$sec,$mon,$day,$year):
+ @mktime($hr,$min,$sec,$mon,$day,$year);
+ }
+
+ $gmt_different = ($is_gmt) ? 0 : adodb_get_gmt_diff();
+
+ $hr = intval($hr);
+ $min = intval($min);
+ $sec = intval($sec);
+ $mon = intval($mon);
+ $day = intval($day);
+ $year = intval($year);
+
+
+ $year = adodb_year_digit_check($year);
+
+ if ($mon > 12) {
+ $y = floor($mon / 12);
+ $year += $y;
+ $mon -= $y*12;
+ }
+
+ $_day_power = 86400;
+ $_hour_power = 3600;
+ $_min_power = 60;
+
+ $_month_table_normal = array("",31,28,31,30,31,30,31,31,30,31,30,31);
+ $_month_table_leaf = array("",31,29,31,30,31,30,31,31,30,31,30,31);
+
+ $_total_date = 0;
+ if ($year >= 1970) {
+ for ($a = 1970 ; $a <= $year; $a++) {
+ $leaf = _adodb_is_leap_year($a);
+ if ($leaf == true) {
+ $loop_table = $_month_table_leaf;
+ $_add_date = 366;
+ } else {
+ $loop_table = $_month_table_normal;
+ $_add_date = 365;
+ }
+ if ($a < $year) {
+ $_total_date += $_add_date;
+ } else {
+ for($b=1;$b<$mon;$b++) {
+ $_total_date += $loop_table[$b];
+ }
+ }
+ }
+ $_total_date +=$day-1;
+ $ret = $_total_date * $_day_power + $hr * $_hour_power + $min * $_min_power + $sec + $gmt_different;
+
+ } else {
+ for ($a = 1969 ; $a >= $year; $a--) {
+ $leaf = _adodb_is_leap_year($a);
+ if ($leaf == true) {
+ $loop_table = $_month_table_leaf;
+ $_add_date = 366;
+ } else {
+ $loop_table = $_month_table_normal;
+ $_add_date = 365;
+ }
+ if ($a > $year) { $_total_date += $_add_date;
+ } else {
+ for($b=12;$b>$mon;$b--) {
+ $_total_date += $loop_table[$b];
+ }
+ }
+ }
+ $_total_date += $loop_table[$mon] - $day;
+
+ $_day_time = $hr * $_hour_power + $min * $_min_power + $sec;
+ $_day_time = $_day_power - $_day_time;
+ $ret = -( $_total_date * $_day_power + $_day_time - $gmt_different);
+ if ($ret < -12220185600) $ret += 10*86400; // if earlier than 5 Oct 1582 - gregorian correction
+ else if ($ret < -12219321600) $ret = -12219321600; // if in limbo, reset to 15 Oct 1582.
+ }
+ //print " dmy=$day/$mon/$year $hr:$min:$sec => " .$ret;
+ return $ret;
+}
+
+?>

\ No newline at end of file

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