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Diffstat (limited to 'framework/DataAccess/adodb/adodb-time.inc.php')
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diff --git a/framework/DataAccess/adodb/adodb-time.inc.php b/framework/DataAccess/adodb/adodb-time.inc.php new file mode 100644 index 00000000..43947545 --- /dev/null +++ b/framework/DataAccess/adodb/adodb-time.inc.php @@ -0,0 +1,1327 @@ +<?php +/** +ADOdb Date Library, part of the ADOdb abstraction library +Download: http://phplens.com/phpeverywhere/ + +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() + strftime() with adodb_strftime() + strftime() with adodb_gmstrftime() +</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) 2003-2005 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($date=false) + +Returns an array containing date information, as getdate(), but supports +dates greater than 1901 to 2038. The local date/time format is derived from a +heuristic the first time adodb_getdate is called. + + +** FUNCTION adodb_date($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 2822 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, $year]) + +Converts a local date to a unix timestamp. Unlike the function mktime(), it supports +dates outside the 1901 to 2038 range. All parameters are optional. + + +** FUNCTION adodb_gmmktime($hr, $min, $sec [, $month, $day, $year]) + +Converts a gmt date to a unix timestamp. Unlike the function gmmktime(), it supports +dates outside the 1901 to 2038 range. Differs from gmmktime() in that all parameters +are currently compulsory. + +** FUNCTION adodb_gmstrftime($fmt, $timestamp = false) +Convert a timestamp to a formatted GMT date. + +** FUNCTION adodb_strftime($fmt, $timestamp = false) + +Convert a timestamp to a formatted local date. Internally converts $fmt into +adodb_date format, then echo result. + +For best results, you can define the local date format yourself. Define a global +variable $ADODB_DATE_LOCALE which is an array, 1st element is date format using +adodb_date syntax, and 2nd element is the time format, also in adodb_date syntax. + + eg. $ADODB_DATE_LOCALE = array('d/m/Y','H:i:s'); + + Supported format codes: + +<pre> + %a - abbreviated weekday name according to the current locale + %A - full weekday name according to the current locale + %b - abbreviated month name according to the current locale + %B - full month name according to the current locale + %c - preferred date and time representation for the current locale + %d - day of the month as a decimal number (range 01 to 31) + %D - same as %m/%d/%y + %e - day of the month as a decimal number, a single digit is preceded by a space (range ' 1' to '31') + %h - same as %b + %H - hour as a decimal number using a 24-hour clock (range 00 to 23) + %I - hour as a decimal number using a 12-hour clock (range 01 to 12) + %m - month as a decimal number (range 01 to 12) + %M - minute as a decimal number + %n - newline character + %p - either `am' or `pm' according to the given time value, or the corresponding strings for the current locale + %r - time in a.m. and p.m. notation + %R - time in 24 hour notation + %S - second as a decimal number + %t - tab character + %T - current time, equal to %H:%M:%S + %x - preferred date representation for the current locale without the time + %X - preferred time representation for the current locale without the date + %y - year as a decimal number without a century (range 00 to 99) + %Y - year as a decimal number including the century + %Z - time zone or name or abbreviation + %% - a literal `%' character +</pre> + + Unsupported codes: +<pre> + %C - century number (the year divided by 100 and truncated to an integer, range 00 to 99) + %g - like %G, but without the century. + %G - The 4-digit year corresponding to the ISO week number (see %V). + This has the same format and value as %Y, except that if the ISO week number belongs + to the previous or next year, that year is used instead. + %j - day of the year as a decimal number (range 001 to 366) + %u - weekday as a decimal number [1,7], with 1 representing Monday + %U - week number of the current year as a decimal number, starting + with the first Sunday as the first day of the first week + %V - The ISO 8601:1988 week number of the current year as a decimal number, + range 01 to 53, where week 1 is the first week that has at least 4 days in the + current year, and with Monday as the first day of the week. (Use %G or %g for + the year component that corresponds to the week number for the specified timestamp.) + %w - day of the week as a decimal, Sunday being 0 + %W - week number of the current year as a decimal number, starting with the + first Monday as the first day of the first week +</pre> + +============================================================================= + +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. Implement daylight savings, which looks awfully complicated, see + http://webexhibits.org/daylightsaving/ + + +CHANGELOG +- 10 Feb 2006 0.23 +PHP5 compat: when we detect PHP5, the RFC2822 format for gmt 0000hrs is changed from -0000 to +0000. + In PHP4, we will still use -0000 for 100% compat with PHP4. + +- 08 Sept 2005 0.22 +In adodb_date2(), $is_gmt not supported properly. Fixed. + +- 18 July 2005 0.21 +In PHP 4.3.11, the 'r' format has changed. Leading 0 in day is added. Changed for compat. +Added support for negative months in adodb_mktime(). + +- 24 Feb 2005 0.20 +Added limited strftime/gmstrftime support. x10 improvement in performance of adodb_date(). + +- 21 Dec 2004 0.17 +In adodb_getdate(), the timestamp was accidentally converted to gmt when $is_gmt is false. +Also adodb_mktime(0,0,0) did not work properly. Both fixed thx Mauro. + +- 17 Nov 2004 0.16 +Removed intval typecast in adodb_mktime() for secs, allowing: + adodb_mktime(0,0,0 + 2236672153,1,1,1934); +Suggested by Ryan. + +- 18 July 2004 0.15 +All params in adodb_mktime were formerly compulsory. Now only the hour, min, secs is compulsory. +This brings it more in line with mktime (still not identical). + +- 23 June 2004 0.14 + +Allow you to define your own daylights savings function, adodb_daylight_sv. +If the function is defined (somewhere in an include), then you can correct for daylights savings. + +In this example, we apply daylights savings in June or July, adding one hour. This is extremely +unrealistic as it does not take into account time-zone, geographic location, current year. + +function adodb_daylight_sv(&$arr, $is_gmt) +{ + if ($is_gmt) return; + $m = $arr['mon']; + if ($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 # day of month, eg 1st day of the month + [mon] => 2 # month (eg. Feb) + [year] => 2102 + [yday] => 31 # days in current year + [leap] => # true if leap year + [ndays] => 28 # no of days in current month + ) + + +- 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',0.23); + +/* + This code was originally for windows. But 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,$m,$d=13) +{ + $t = adodb_mktime(0,0,0,$m,$d,$y1); + $rez = adodb_date('Y-n-j H:i:s',$t); + if ("$y1-$m-$d 00:00:00" != $rez) { + print "<b>$y1 error, expected=$y1-$m-$d 00:00:00, adodb=$rez</b><br>"; + return false; + } + return true; +} + +function adodb_date_test_strftime($fmt) +{ + $s1 = strftime($fmt); + $s2 = adodb_strftime($fmt); + + if ($s1 == $s2) return true; + + echo "error for $fmt, strftime=$s1, $adodb=$s2<br>"; + return false; +} + +/** + Test Suite +*/ +function adodb_date_test() +{ + + error_reporting(E_ALL); + print "<h4>Testing adodb_date and adodb_mktime. version=".ADODB_DATE_VERSION.' PHP='.PHP_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); + + adodb_date_test_strftime('%Y %m %x %X'); + adodb_date_test_strftime("%A %d %B %Y"); + adodb_date_test_strftime("%H %M S"); + + $t = adodb_mktime(0,0,0); + if (!(adodb_date('Y-m-d') == date('Y-m-d'))) print 'Error in '.adodb_mktime(0,0,0).'<br>'; + + $t = adodb_mktime(0,0,0,6,1,2102); + if (!(adodb_date('Y-m-d',$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\C2822 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(): $ts<br><pre> + \"$s1\" (date len=".strlen($s1).") + \"$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: "; + $cnt = 0; + for ($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; + } + $cnt += 1; + } + echo "Tested $cnt dates<br>"; + if (!$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 + $greg_correction; + + return $day - 7 * floor($day / 7); +} + + +/** + 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); +} + +/* +// generate $YRS table for _adodb_getdate() +function adodb_date_gentable($out=true) +{ + + for ($i=1970; $i >= 1600; $i-=10) { + $s = adodb_gmmktime(0,0,0,1,1,$i); + echo "$i => $s,<br>"; + } +} +adodb_date_gentable(); + +for ($i=1970; $i > 1500; $i--) { + +echo "<hr />$i "; + adodb_date_test_date($i,1,1); +} + +*/ + + +$_month_table_normal = array("",31,28,31,30,31,30,31,31,30,31,30,31); +$_month_table_leaf = array("",31,29,31,30,31,30,31,31,30,31,30,31); + +function adodb_validdate($y,$m,$d) +{ +global $_month_table_normal,$_month_table_leaf; + + if (_adodb_is_leap_year($y)) $marr =& $_month_table_leaf; + else $marr =& $_month_table_normal; + + if ($m > 12 || $m < 1) return false; + + if ($d > 31 || $d < 1) return false; + + if ($marr[$m] < $d) return false; + + if ($y < 1000 && $y > 3000) return false; + + return true; +} + +/** + 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) +{ +static $YRS; +global $_month_table_normal,$_month_table_leaf; + + $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); + + $d366 = $_day_power * 366; + $d365 = $_day_power * 365; + + if ($d < 0) { + + if (empty($YRS)) $YRS = array( + 1970 => 0, + 1960 => -315619200, + 1950 => -631152000, + 1940 => -946771200, + 1930 => -1262304000, + 1920 => -1577923200, + 1910 => -1893456000, + 1900 => -2208988800, + 1890 => -2524521600, + 1880 => -2840140800, + 1870 => -3155673600, + 1860 => -3471292800, + 1850 => -3786825600, + 1840 => -4102444800, + 1830 => -4417977600, + 1820 => -4733596800, + 1810 => -5049129600, + 1800 => -5364662400, + 1790 => -5680195200, + 1780 => -5995814400, + 1770 => -6311347200, + 1760 => -6626966400, + 1750 => -6942499200, + 1740 => -7258118400, + 1730 => -7573651200, + 1720 => -7889270400, + 1710 => -8204803200, + 1700 => -8520336000, + 1690 => -8835868800, + 1680 => -9151488000, + 1670 => -9467020800, + 1660 => -9782640000, + 1650 => -10098172800, + 1640 => -10413792000, + 1630 => -10729324800, + 1620 => -11044944000, + 1610 => -11360476800, + 1600 => -11676096000); + + if ($is_gmt) $origd = $d; + // The valid range of a 32bit signed timestamp is typically from + // Fri, 13 Dec 1901 20:45:54 GMT to Tue, 19 Jan 2038 03:14:07 GMT + // + + # old algorithm iterates through all years. new algorithm does it in + # 10 year blocks + + /* + # old algo + for ($a = 1970 ; --$a >= 0;) { + $lastd = $d; + + if ($leaf = _adodb_is_leap_year($a)) $d += $d366; + else $d += $d365; + + if ($d >= 0) { + $year = $a; + break; + } + } + */ + + $lastsecs = 0; + $lastyear = 1970; + foreach($YRS as $year => $secs) { + if ($d >= $secs) { + $a = $lastyear; + break; + } + $lastsecs = $secs; + $lastyear = $year; + } + + $d -= $lastsecs; + if (!isset($a)) $a = $lastyear; + + //echo ' yr=',$a,' ', $d,'.'; + + for (; --$a >= 0;) { + $lastd = $d; + + if ($leaf = _adodb_is_leap_year($a)) $d += $d366; + else $d += $d365; + + if ($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 -= $d366; + else $d -= $d365; + if ($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],false,$is_gmt); + else $d = @adodb_mktime($rr[5],$rr[6],$rr[7],$rr[2],$rr[3],$rr[1],false,$is_gmt); + } + + return adodb_date($fmt,$d,$is_gmt); +} + + +/** + Return formatted date based on timestamp $d +*/ +function adodb_date($fmt,$d=false,$is_gmt=false) +{ +static $daylight; + + if ($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,$is_gmt); + + if (!isset($daylight)) $daylight = function_exists('adodb_daylight_sv'); + if ($daylight) 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 = ''; + + $isphp5 = PHP_VERSION >= 5; + + /* + 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 + + // 4.3.11 uses '04 Jun 2004' + // 4.3.8 uses ' 4 Jun 2004' + $dates .= gmdate('D',$_day_power*(3+adodb_dow($year,$month,$day))).', ' + . ($day<10?'0'.$day:$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; + + $gmt = adodb_get_gmt_diff(); + if ($isphp5) + $dates .= sprintf(' %s%04d',($gmt<=0)?'+':'-',abs($gmt)/36); + else + $dates .= sprintf(' %s%04d',($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 && $day != 12) $dates .= 'nd'; + else if ($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(); + + if ($isphp5) + $dates .= sprintf('%s%04d',($gmt<=0)?'+':'-',abs($gmt)/36); + else + $dates .= sprintf('%s%04d',($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,$mon=false,$day=false,$year=false,$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,$mon=false,$day=false,$year=false,$is_dst=false,$is_gmt=false) +{ + if (!defined('ADODB_TEST_DATES')) { + + if ($mon === false) { + return $is_gmt? @gmmktime($hr,$min,$sec): @mktime($hr,$min,$sec); + } + + // for windows, we don't check 1970 because with timezone differences, + // 1 Jan 1970 could generate negative timestamp, which is illegal + if (1971 < $year && $year < 2038 + || !defined('ADODB_NO_NEGATIVE_TS') && (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(); + + /* + # disabled because some people place large values in $sec. + # however we need it for $mon because we use an array... + $hr = intval($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 -= $y*12; + } else if ($mon < 1) { + $y = ceil((1-$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 $ret; +} + +function adodb_gmstrftime($fmt, $ts=false) +{ + return adodb_strftime($fmt,$ts,true); +} + +// hack - convert to adodb_date +function adodb_strftime($fmt, $ts=false,$is_gmt=false) +{ +global $ADODB_DATE_LOCALE; + + if (!defined('ADODB_TEST_DATES')) { + if ((abs($ts) <= 0x7FFFFFFF)) { // check if number in 32-bit signed range + if (!defined('ADODB_NO_NEGATIVE_TS') || $ts >= 0) // if windows, must be +ve integer + return ($is_gmt)? @gmstrftime($fmt,$ts): @strftime($fmt,$ts); + + } + } + + if (empty($ADODB_DATE_LOCALE)) { + $tstr = strtoupper(gmstrftime('%c',31366800)); // 30 Dec 1970, 1 am + $sep = substr($tstr,2,1); + $hasAM = strrpos($tstr,'M') !== false; + + $ADODB_DATE_LOCALE = array(); + $ADODB_DATE_LOCALE[] = strncmp($tstr,'30',2) == 0 ? 'd'.$sep.'m'.$sep.'y' : 'm'.$sep.'d'.$sep.'y'; + $ADODB_DATE_LOCALE[] = ($hasAM) ? 'h:i:s a' : 'H:i:s'; + + } + $inpct = false; + $fmtdate = ''; + for ($i=0,$max = strlen($fmt); $i < $max; $i++) { + $ch = $fmt[$i]; + if ($ch == '%') { + if ($inpct) { + $fmtdate .= '%'; + $inpct = false; + } else + $inpct = true; + } else if ($inpct) { + + $inpct = false; + switch($ch) { + case '0': + case '1': + case '2': + case '3': + case '4': + case '5': + case '6': + case '7': + case '8': + case '9': + case 'E': + case 'O': + /* ignore format modifiers */ + $inpct = true; + break; + + case 'a': $fmtdate .= 'D'; break; + case 'A': $fmtdate .= 'l'; break; + case 'h': + case 'b': $fmtdate .= 'M'; break; + case 'B': $fmtdate .= 'F'; break; + case 'c': $fmtdate .= $ADODB_DATE_LOCALE[0].$ADODB_DATE_LOCALE[1]; break; + case 'C': $fmtdate .= '\C?'; break; // century + case 'd': $fmtdate .= 'd'; break; + case 'D': $fmtdate .= 'm/d/y'; break; + case 'e': $fmtdate .= 'j'; break; + case 'g': $fmtdate .= '\g?'; break; //? + case 'G': $fmtdate .= '\G?'; break; //? + case 'H': $fmtdate .= 'H'; break; + case 'I': $fmtdate .= 'h'; break; + case 'j': $fmtdate .= '?z'; $parsej = true; break; // wrong as j=1-based, z=0-basd + case 'm': $fmtdate .= 'm'; break; + case 'M': $fmtdate .= 'i'; break; + case 'n': $fmtdate .= "\n"; break; + case 'p': $fmtdate .= 'a'; break; + case 'r': $fmtdate .= 'h:i:s a'; break; + case 'R': $fmtdate .= 'H:i:s'; break; + case 'S': $fmtdate .= 's'; break; + case 't': $fmtdate .= "\t"; break; + case 'T': $fmtdate .= 'H:i:s'; break; + case 'u': $fmtdate .= '?u'; $parseu = true; break; // wrong strftime=1-based, date=0-based + case 'U': $fmtdate .= '?U'; $parseU = true; break;// wrong strftime=1-based, date=0-based + case 'x': $fmtdate .= $ADODB_DATE_LOCALE[0]; break; + case 'X': $fmtdate .= $ADODB_DATE_LOCALE[1]; break; + case 'w': $fmtdate .= '?w'; $parseu = true; break; // wrong strftime=1-based, date=0-based + case 'W': $fmtdate .= '?W'; $parseU = true; break;// wrong strftime=1-based, date=0-based + case 'y': $fmtdate .= 'y'; break; + case 'Y': $fmtdate .= 'Y'; break; + case 'Z': $fmtdate .= 'T'; break; + } + } else if (('A' <= ($ch) && ($ch) <= 'Z' ) || ('a' <= ($ch) && ($ch) <= 'z' )) + $fmtdate .= "\\".$ch; + else + $fmtdate .= $ch; + } + //echo "fmt=",$fmtdate,"<br>"; + if ($ts === false) $ts = time(); + $ret = adodb_date($fmtdate, $ts, $is_gmt); + return $ret; +} + + +?>
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