mirror of
https://github.com/zydeco/minivmac4ios.git
synced 2024-11-22 19:31:47 +00:00
118 lines
4.0 KiB
C
Executable File
118 lines
4.0 KiB
C
Executable File
/*
|
|
DATE2SEC.h
|
|
Copyright (C) 2003 Bradford L. Barrett, Paul C. Pratt
|
|
|
|
You can redistribute this file and/or modify it under the terms
|
|
of version 2 of the GNU General Public License as published by
|
|
the Free Software Foundation. You should have received a copy
|
|
of the license along with this file; see the file COPYING.
|
|
|
|
This file is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
license for more details.
|
|
*/
|
|
|
|
/*
|
|
DATE 2(to) SEConds
|
|
|
|
convert year/month/day/hour/minute/second
|
|
to number of seconds since the beginning
|
|
of 1904, the format for storing dates
|
|
on the Macintosh.
|
|
|
|
The function jdate is from the program Webalizer
|
|
by Bradford L. Barrett.
|
|
*/
|
|
|
|
#ifdef DATE2SEC_H
|
|
#error "header already included"
|
|
#else
|
|
#define DATE2SEC_H
|
|
#endif
|
|
|
|
/*
|
|
The function jdate was found at the end of the file
|
|
webalizer.c in the program webalizer at
|
|
"www.mrunix.net/webalizer/".
|
|
Here is copyright info from the top of that file:
|
|
|
|
webalizer - a web server log analysis program
|
|
|
|
Copyright (C) 1997-2000 Bradford L. Barrett (brad@mrunix.net)
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version, and provided that the above
|
|
copyright and permission notice is included with all distributed
|
|
copies of this or derived software.
|
|
*/
|
|
|
|
/* ************************************************************* */
|
|
/* */
|
|
/* JDATE - Julian date calculator */
|
|
/* */
|
|
/* Calculates the number of days since Jan 1, 0000. */
|
|
/* */
|
|
/* Originally written by Bradford L. Barrett (03/17/1988) */
|
|
/* Returns an unsigned long value representing the number of */
|
|
/* days since January 1, 0000. */
|
|
/* */
|
|
/* Note: Due to the changes made by Pope Gregory XIII in the */
|
|
/* 16th Centyry (Feb 24, 1582), dates before 1583 will */
|
|
/* not return a truely accurate number (will be at least */
|
|
/* 10 days off). Somehow, I don't think this will */
|
|
/* present much of a problem for most situations :) */
|
|
/* */
|
|
/* Usage: days = jdate(day, month, year) */
|
|
/* */
|
|
/* The number returned is adjusted by 5 to facilitate day of */
|
|
/* week calculations. The mod of the returned value gives the */
|
|
/* day of the week the date is. (ie: dow = days % 7) where */
|
|
/* dow will return 0=Sunday, 1=Monday, 2=Tuesday, etc... */
|
|
/* */
|
|
/* ************************************************************* */
|
|
|
|
LOCALFUNC ui5b jdate(int day, int month, int year)
|
|
{
|
|
ui5b days; /* value returned */
|
|
int mtable[] = {
|
|
0, 31, 59, 90, 120, 151,
|
|
181, 212, 243, 273, 304, 334
|
|
};
|
|
|
|
/*
|
|
First, calculate base number including leap
|
|
and Centenial year stuff
|
|
*/
|
|
|
|
days = (((ui5b)year * 365) + day + mtable[month - 1]
|
|
+ ((year + 4) / 4) - ((year / 100) - (year / 400)));
|
|
|
|
/* now adjust for leap year before March 1st */
|
|
|
|
if ((year % 4 == 0)
|
|
&& (! ((year % 100 == 0) && (year % 400 != 0)))
|
|
&& (month < 3))
|
|
{
|
|
--days;
|
|
}
|
|
|
|
/* done, return with calculated value */
|
|
|
|
return (days + 5);
|
|
}
|
|
|
|
LOCALFUNC ui5b Date2MacSeconds(int second, int minute, int hour,
|
|
int day, int month, int year)
|
|
{
|
|
ui5b curjdate;
|
|
ui5b basejdate;
|
|
|
|
curjdate = jdate(day, month, year);
|
|
basejdate = jdate(1, 1, 1904);
|
|
return (((curjdate - basejdate) * 24 + hour) * 60
|
|
+ minute) * 60 + second;
|
|
}
|