aboutsummaryrefslogtreecommitdiffstats
path: root/calendar/calcs.c
diff options
context:
space:
mode:
Diffstat (limited to 'calendar/calcs.c')
-rw-r--r--calendar/calcs.c253
1 files changed, 0 insertions, 253 deletions
diff --git a/calendar/calcs.c b/calendar/calcs.c
deleted file mode 100644
index d6150f7b35..0000000000
--- a/calendar/calcs.c
+++ /dev/null
@@ -1,253 +0,0 @@
-/*
- * calc.c Calculations to work out what day it is etc for the Calendar
- *
- * Most of this stuff was taken from the gcal source by Thomas Esken.
- * <esken@uni-muenster.de>
- * gcal is a text-based calendar program
- */
-
-#include <time.h>
-#include <glib.h>
-#include <ctype.h>
-#include "calcs.h"
-
-#include <config.h>
-
-#ifndef HAVE_STRCASECMP
-int strcasecmp(const char * /*s1*/, const char * /*s2*/);
-#endif
-
-/* Number of days in a month */
-static const int dvec[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
-/* Number of past days of a month */
-static const int mvec[] = { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334};
-Greg_struct greg_reform_date[6] = {
-/* {int year, int month, int f_day, int l_day} */
- { 1582, 10, 5, 14 },
- { 1700, 2, 19, 28 },
- { 1752, 9, 3, 13 },
- { 1753, 2, 18, 28 },
-/* must be left with all zeroes */
- { 0,0,0,0 }
-};
-Greg_struct *greg=greg_reform_date;
-
-
-
-/*
- * Computes the number of days in February and returns them,
- */
-int days_of_february(const int year)
-{
- return((year&3) ? 28 : (!(year%100)&&(year%400)) ? 28 : 29);
-}
-
-int is_leap_year(const int year)
-{
- return (days_of_february(year) == 29);
-}
-
-/*
- * Check wether a given date is calid.
- */
-int valid_date(const int day, const int month, const int year)
-{
- if ( day < 1
- || month < MONTH_MIN
- || month > MONTH_MAX
- || ( (month != 2)
- && (day > dvec[month-1]))
- || ( (month == 2)
- && (day > days_of_february (year))))
- return(FALSE);
-
- return(TRUE);
-}
-
-/*
- * Set a date back one day (to yesterday's date)
- */
-void prev_date(int *day, int *month, int *year)
-{
- (*day)--;
- if ( !*day || !valid_date(*day, *month, *year)) {
- (*month)--;
- if (*month < MONTH_MIN) {
- *month = MONTH_MAX;
- (*year)--;
- }
- if (*month ==2)
- *day = days_of_february(*year);
- else
- *day = dvec[*month-1];
- }
-} /* prev_date */
-
-/*
- * Set a date forward one day (to tomorrow's date)
- */
-void next_date(int *day, int *month, int *year)
-{
- (*day)++;
- if (!valid_date(*day, *month, *year)) {
- *day = DAY_MIN;
- if (*month == MONTH_MAX) {
- *month = MONTH_MIN;
- (*year)++;
- } else
- (*month)++;
- }
-} /* next_date */
-
-/*
- * Get date from the system
- */
-void get_system_date(int *day, int *month, int *year)
-{
- auto struct tm *sys_date;
- auto time_t sys_time;
-
-
- sys_time = time((time_t *)NULL);
- sys_date = localtime(&sys_time);
- *day = sys_date->tm_mday;
- *month = sys_date->tm_mon + 1;
- *year = sys_date->tm_year;
- if (*year < CENTURY)
- *year += CENTURY;
-} /* get_system_date */
-
-
-/*
- * Given a string with the name of a month, return 1..12 or 0 if not found
- */
-int month_atoi(const char *string)
-{
- int i;
- for (i = MONTH_MIN; i <= MONTH_MAX; i++)
- if (strcasecmp(string, (char *)get_month_name(i)) == 0)
- return i;
- return 0;
-}
-
-int day_atoi(const char *string)
-{
- int i;
- for (i = DAY_MIN; i <= DAY_MAX; i++)
- if (strcasecmp(string, (char *)get_day_name(i)) == 0)
- return i;
- return 0;
-}
-
-/*
- * Returns ordinal suffix (st, nd, rd, th) for a day
- */
-const char *day_suffix(int day)
-{
- static const char *suffix[]={"th", "st", "nd", "rd"};
- register int i;
-
- i = 0;
-
- if (day > 100)
- day %= 100;
- if (day < 11 || day > 13)
- i = day % 10;
- if (i > 3)
- i = 0;
-
- return(suffix[i]);
-} /* day_suffix */
-
-/*
- * Returns the short name of the day of week, format "%-3s"
- */
-const char *short3_day_name(const int day)
-{
- static const char *name[]={"invalid day", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"};
-
- return(((day<DAY_MIN)||(day>DAY_MAX)) ? name[0] : name[day]);
-} /* short3_day_name */
-
-/*
- * Returns the short name of day of week
- */
-const char *short_day_name(const int day)
-{
- static const char *name[]={"invalid day", "Mo", "Tu", "We", "Th", "Fr", "Sa", "Su"};
-
- return(((day<DAY_MIN)||(day>DAY_MAX)) ? name[0] : name[day]);
-} /* short_day_name */
-
-/*
- * Returns the complete name of the day
- */
-const char *get_day_name(const int day)
-{
- static const char *name[]={"invalid day", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"};
-
- return(((day<DAY_MIN)||(day>DAY_MAX)) ? name[0] : name[day]);
-} /* day_name */
-
-/*
- * Returns the short name of the month
- */
-const char *short_month_name(const int month)
-{
- static const char *name[]={ "invalid month", "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
-
- return(((month<MONTH_MIN)||(month>MONTH_MAX)) ? name[0] : name[month]);
-} /* short_month_name() */
-
-/*
- * Returns the name of the month
- */
-const char *get_month_name(const int month)
-{
- static const char *name[]={ "invalid month", "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"};
-
- return(((month<MONTH_MIN)||(month>MONTH_MAX)) ? name[0] : name[month]);
-} /* month_name() */
-
-/*
- * Compute the absolute number of days of the given date since 1 Jan 0001
- * respecting the missing period of the Gregorian Reformation
- * I am glad someone else worked this one out!! - cs
- */
-unsigned long int date2num(const int day, const int month, const int year)
-{
- auto unsigned long int julian_days;
-
- julian_days = (unsigned long int)((year-1)*(unsigned long int)(DAY_LAST)+((year-1)>>2));
-
- if (year > greg->year
- || ( (year == greg->year)
- && ( month > greg->month
- || ( (month == greg->month)
- && (day > greg->last_day)))))
- julian_days -= (unsigned long int)(greg->last_day - greg->first_day + 1);
- if (year > greg->year) {
- julian_days += (((year-1) / 400) - (greg->year / 400));
- julian_days -= (((year-1) / 100) - (greg->year / 100));
- if (!(greg->year % 100) && (greg->year % 400))
- julian_days--;
- }
- julian_days += (unsigned long int)mvec[month-1];
- julian_days += day;
- if ( (days_of_february(year) == 29) && (month > 2))
- julian_days++;
-
- return(julian_days);
-} /* date2num */
-
-/*
- * Computes the weekday of a Gregorian/Julian calendar date
- * (month must be 1..12) returns 1..7 (mo..su)
- */
-int weekday_of_date(const int day, const int month, const int year)
-{
- auto unsigned long int julian_days=date2num(day, month,year)%DAY_MAX;
-
- return((julian_days>2) ? (int)julian_days-2 : (int)julian_days+5);
-} /* weekday_of_date() */
-
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-09 20:47:46 +0800