mirror of
https://github.com/php/php-src.git
synced 2024-11-29 12:53:37 +08:00
0998fcd804
the function return the symbolic hebrew name. (Patch by Moshe Doron <mosdoron@netvision.net.il>) @- Added an aditional parameter to the jdtojewish() function which makes @ the function return the symbolic hebrew name. (Moshe Doron, Derick)
98 lines
3.8 KiB
C
98 lines
3.8 KiB
C
#ifndef SDNCAL_H
|
|
#define SDNCAL_H
|
|
/*
|
|
* This code has been modified for use with PHP
|
|
* by Shane Caraveo shane@caraveo.com
|
|
* see below for more details
|
|
*
|
|
*/
|
|
|
|
/* $selId: sdncal.h,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.
|
|
*/
|
|
|
|
/**************************************************************************
|
|
*
|
|
* This package defines a set of routines that convert calendar dates to
|
|
* and from a serial day number (SDN). The SDN is a serial numbering of
|
|
* days where SDN 1 is November 25, 4714 BC in the Gregorian calendar and
|
|
* SDN 2447893 is January 1, 1990. This system of day numbering is
|
|
* sometimes referred to as Julian days, but to avoid confusion with the
|
|
* Julian calendar, it is referred to as serial day numbers here. The term
|
|
* Julian days is also used to mean the number of days since the beginning
|
|
* of the current year.
|
|
*
|
|
* The SDN can be used as an intermediate step in converting from one
|
|
* calendar system to another (such as Gregorian to Jewish). It can also
|
|
* be used for date computations such as easily comparing two dates,
|
|
* determining the day of the week, finding the date of yesterday or
|
|
* calculating the number of days between two dates.
|
|
*
|
|
* When using this software on 16 bit systems, be careful to store SDNs in
|
|
* a long int, because it will not fit in the 16 bits that some systems
|
|
* allocate to an int.
|
|
*
|
|
* For each calendar, there are two routines provided. One converts dates
|
|
* in that calendar to SDN and the other converts SDN to calendar dates.
|
|
* The routines are named SdnTo<CALENDAR>() and <CALENDAR>ToSdn(), where
|
|
* <CALENDAR> is the name of the calendar system.
|
|
*
|
|
* SDN values less than one are not supported. If a conversion routine
|
|
* returns an SDN of zero, this means that the date given is either invalid
|
|
* or is outside the supported range for that calendar.
|
|
*
|
|
* At least some validity checks are performed on input dates. For
|
|
* example, a negative month number will result in the return of zero for
|
|
* the SDN. A returned SDN greater than one does not necessarily mean that
|
|
* the input date was valid. To determine if the date is valid, convert it
|
|
* to SDN, and if the SDN is greater than zero, convert it back to a date
|
|
* and compare to the original. For example:
|
|
*
|
|
* int y1, m1, d1;
|
|
* int y2, m2, d2;
|
|
* long int sdn;
|
|
* ...
|
|
* sdn = GregorianToSdn(y1, m1, d1);
|
|
* if (sdn > 0) {
|
|
* SdnToGregorian(sdn, &y2, &m2, &d2);
|
|
* if (y1 == y2 && m1 == m2 && d1 == d2) {
|
|
* ... date is valid ...
|
|
* }
|
|
* }
|
|
*
|
|
**************************************************************************/
|
|
|
|
/* Gregorian calendar conversions. */
|
|
void SdnToGregorian(long int sdn, int *pYear, int *pMonth, int *pDay);
|
|
long int GregorianToSdn(int year, int month, int day);
|
|
extern char *MonthNameShort[13];
|
|
extern char *MonthNameLong[13];
|
|
|
|
/* Julian calendar conversions. */
|
|
void SdnToJulian(long int sdn, int *pYear, int *pMonth, int *pDay);
|
|
long int JulianToSdn(int year, int month, int day);
|
|
|
|
/* Jewish calendar conversions. */
|
|
void SdnToJewish(long int sdn, int *pYear, int *pMonth, int *pDay);
|
|
long int JewishToSdn(int year, int month, int day);
|
|
extern char *JewishMonthName[14];
|
|
extern char *JewishMonthHebName[14];
|
|
|
|
/* French republic calendar conversions. */
|
|
void SdnToFrench(long int sdn, int *pYear, int *pMonth, int *pDay);
|
|
long int FrenchToSdn(int inputYear, int inputMonth, int inputDay);
|
|
extern char *FrenchMonthName[14];
|
|
|
|
/* Islamic calendar conversions. */
|
|
/* Not implemented yet. */
|
|
|
|
/* Day of week conversion. 0=Sunday, 6=Saturday */
|
|
int DayOfWeek(long int sdn);
|
|
extern char *DayNameShort[7];
|
|
extern char *DayNameLong[7];
|
|
|
|
#endif /* SDNCAL_H */
|