This commit was manufactured by cvs2svn to create branch 'PHP_5'.PHP-5

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diff --git a/ext/calendar/gregor.c b/ext/calendar/gregor.c
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--- a/ext/calendar/gregor.c
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-/* $selId: gregor.c,v 2.0 1995/10/24 01:13:06 lees Exp $
- * Copyright 1993-1995, Scott E. Lee, all rights reserved.
- * Permission granted to use, copy, modify, distribute and sell so long as
- * the above copyright and this permission statement are retained in all
- * copies.  THERE IS NO WARRANTY - USE AT YOUR OWN RISK.
- */
-
-/**************************************************************************
- *
- * These are the externally visible components of this file:
- *
- *     void
- *     SdnToGregorian(
- *         long int  sdn,
- *         int      *pYear,
- *         int      *pMonth,
- *         int      *pDay);
- *
- * Convert a SDN to a Gregorian calendar date.  If the input SDN is less
- * than 1, the three output values will all be set to zero, otherwise
- * *pYear will be >= -4714 and != 0; *pMonth will be in the range 1 to 12
- * inclusive; *pDay will be in the range 1 to 31 inclusive.
- *
- *     long int
- *     GregorianToSdn(
- *         int inputYear,
- *         int inputMonth,
- *         int inputDay);
- *
- * Convert a Gregorian calendar date to a SDN.  Zero is returned when the
- * input date is detected as invalid or out of the supported range.  The
- * return value will be > 0 for all valid, supported dates, but there are
- * some invalid dates that will return a positive value.  To verify that a
- * date is valid, convert it to SDN and then back and compare with the
- * original.
- *
- *     char *MonthNameShort[13];
- *
- * Convert a Gregorian month number (1 to 12) to the abbreviated (three
- * character) name of the Gregorian month (null terminated).  An index of
- * zero will return a zero length string.
- *
- *     char *MonthNameLong[13];
- *
- * Convert a Gregorian month number (1 to 12) to the name of the Gregorian
- * month (null terminated).  An index of zero will return a zero length
- * string.
- *
- * VALID RANGE
- *
- *     4714 B.C. to at least 10000 A.D.
- *
- *     Although this software can handle dates all the way back to 4714
- *     B.C., such use may not be meaningful.  The Gregorian calendar was
- *     not instituted until October 15, 1582 (or October 5, 1582 in the
- *     Julian calendar).  Some countries did not accept it until much
- *     later.  For example, Britain converted in 1752, The USSR in 1918 and
- *     Greece in 1923.  Most European countries used the Julian calendar
- *     prior to the Gregorian.
- *
- * CALENDAR OVERVIEW
- *
- *     The Gregorian calendar is a modified version of the Julian calendar.
- *     The only difference being the specification of leap years.  The
- *     Julian calendar specifies that every year that is a multiple of 4
- *     will be a leap year.  This leads to a year that is 365.25 days long,
- *     but the current accepted value for the tropical year is 365.242199
- *     days.
- *
- *     To correct this error in the length of the year and to bring the
- *     vernal equinox back to March 21, Pope Gregory XIII issued a papal
- *     bull declaring that Thursday October 4, 1582 would be followed by
- *     Friday October 15, 1582 and that centennial years would only be a
- *     leap year if they were a multiple of 400.  This shortened the year
- *     by 3 days per 400 years, giving a year of 365.2425 days.
- *
- *     Another recently proposed change in the leap year rule is to make
- *     years that are multiples of 4000 not a leap year, but this has never
- *     been officially accepted and this rule is not implemented in these
- *     algorithms.
- *
- * ALGORITHMS
- *
- *     The calculations are based on three different cycles: a 400 year
- *     cycle of leap years, a 4 year cycle of leap years and a 5 month
- *     cycle of month lengths.
- *
- *     The 5 month cycle is used to account for the varying lengths of
- *     months.  You will notice that the lengths alternate between 30
- *     and 31 days, except for three anomalies: both July and August
- *     have 31 days, both December and January have 31, and February
- *     is less than 30.  Starting with March, the lengths are in a
- *     cycle of 5 months (31, 30, 31, 30, 31):
- *
- *         Mar   31 days  \
- *         Apr   30 days   |
- *         May   31 days    > First cycle
- *         Jun   30 days   |
- *         Jul   31 days  /
- *
- *         Aug   31 days  \
- *         Sep   30 days   |
- *         Oct   31 days    > Second cycle
- *         Nov   30 days   |
- *         Dec   31 days  /
- *
- *         Jan   31 days  \
- *         Feb 28/9 days   |
- *                          > Third cycle (incomplete)
- *
- *     For this reason the calculations (internally) assume that the
- *     year starts with March 1.
- *
- * TESTING
- *
- *     This algorithm has been tested from the year 4714 B.C. to 10000
- *     A.D.  The source code of the verification program is included in
- *     this package.
- *
- * REFERENCES
- *
- *     Conversions Between Calendar Date and Julian Day Number by Robert J.
- *     Tantzen, Communications of the Association for Computing Machinery
- *     August 1963.  (Also published in Collected Algorithms from CACM,
- *     algorithm number 199).
- *
- **************************************************************************/
-
-#include "sdncal.h"
-
-#define GREGOR_SDN_OFFSET         32045
-#define DAYS_PER_5_MONTHS  153
-#define DAYS_PER_4_YEARS   1461
-#define DAYS_PER_400_YEARS 146097
-
-void SdnToGregorian(
-					   long int sdn,
-					   int *pYear,
-					   int *pMonth,
-					   int *pDay)
-{
-	int century;
-	int year;
-	int month;
-	int day;
-	long int temp;
-	int dayOfYear;
-
-	if (sdn <= 0) {
-		*pYear = 0;
-		*pMonth = 0;
-		*pDay = 0;
-		return;
-	}
-	temp = (sdn + GREGOR_SDN_OFFSET) * 4 - 1;
-
-	/* Calculate the century (year/100). */
-	century = temp / DAYS_PER_400_YEARS;
-
-	/* Calculate the year and day of year (1 <= dayOfYear <= 366). */
-	temp = ((temp % DAYS_PER_400_YEARS) / 4) * 4 + 3;
-	year = (century * 100) + (temp / DAYS_PER_4_YEARS);
-	dayOfYear = (temp % DAYS_PER_4_YEARS) / 4 + 1;
-
-	/* Calculate the month and day of month. */
-	temp = dayOfYear * 5 - 3;
-	month = temp / DAYS_PER_5_MONTHS;
-	day = (temp % DAYS_PER_5_MONTHS) / 5 + 1;
-
-	/* Convert to the normal beginning of the year. */
-	if (month < 10) {
-		month += 3;
-	} else {
-		year += 1;
-		month -= 9;
-	}
-
-	/* Adjust to the B.C./A.D. type numbering. */
-	year -= 4800;
-	if (year <= 0)
-		year--;
-
-	*pYear = year;
-	*pMonth = month;
-	*pDay = day;
-}
-
-long int GregorianToSdn(
-						   int inputYear,
-						   int inputMonth,
-						   int inputDay)
-{
-	int year;
-	int month;
-
-	/* check for invalid dates */
-	if (inputYear == 0 || inputYear < -4714 ||
-		inputMonth <= 0 || inputMonth > 12 ||
-		inputDay <= 0 || inputDay > 31) {
-		return (0);
-	}
-	/* check for dates before SDN 1 (Nov 25, 4714 B.C.) */
-	if (inputYear == -4714) {
-		if (inputMonth < 11) {
-			return (0);
-		}
-		if (inputMonth == 11 && inputDay < 25) {
-			return (0);
-		}
-	}
-	/* Make year always a positive number. */
-	if (inputYear < 0) {
-		year = inputYear + 4801;
-	} else {
-		year = inputYear + 4800;
-	}
-
-	/* Adjust the start of the year. */
-	if (inputMonth > 2) {
-		month = inputMonth - 3;
-	} else {
-		month = inputMonth + 9;
-		year--;
-	}
-
-	return (((year / 100) * DAYS_PER_400_YEARS) / 4
-			+ ((year % 100) * DAYS_PER_4_YEARS) / 4
-			+ (month * DAYS_PER_5_MONTHS + 2) / 5
-			+ inputDay
-			- GREGOR_SDN_OFFSET);
-}
-
-char *MonthNameShort[13] =
-{
-	"",
-	"Jan",
-	"Feb",
-	"Mar",
-	"Apr",
-	"May",
-	"Jun",
-	"Jul",
-	"Aug",
-	"Sep",
-	"Oct",
-	"Nov",
-	"Dec"
-};
-
-char *MonthNameLong[13] =
-{
-	"",
-	"January",
-	"February",
-	"March",
-	"April",
-	"May",
-	"June",
-	"July",
-	"August",
-	"September",
-	"October",
-	"November",
-	"December"
-};