From 2485eae90d07f5d649729e6bd02d15ae1b38006d Mon Sep 17 00:00:00 2001 From: Craig Small Date: Mon, 12 Jan 1998 02:51:30 +0000 Subject: New Gnome Calendar files svn path=/trunk/; revision=2 --- calendar/calcs.h | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 calendar/calcs.h (limited to 'calendar/calcs.h') diff --git a/calendar/calcs.h b/calendar/calcs.h new file mode 100644 index 0000000000..e5e6a09b23 --- /dev/null +++ b/calendar/calcs.h @@ -0,0 +1,53 @@ +/* + * function prototypes + */ +int days_of_february(const int year); +int is_leap_year(const int year); +int valid_date(const int day, const int month, const int year); +void get_system_date(int *day, int *month, int *year); +void prev_date(int *day, int *month, int *year); +void next_date(int *day, int *month, int *year); +int month_atoi(const char *string); +int day_atoi(const char *string); +const char *day_suffix(int day); +const char *short3_day_name(int day); +const char *short_day_name(int day); +const char *day_name(int day); +const char *short_month_name(int month); +const char *month_name(int month); +unsigned long int date2num(const int day, const int month, const int year); +int weekday_of_date(const int day, const int month, const int year); + + +/* + * Important preprocessor symbols for the internal ranges. + */ +#define DAY_LAST 365 /* Last day in a NON leap year */ +#define DAY_MIN 1 /* Minimum day of week/month/year */ +#define DAY_MAX 7 /* Maximum day/amount of days of week */ +#define WEEK_MAX 52 /* Maximum week number of year */ +#define MONTH_LAST 31 /* Highest day number in a month */ +#define MONTH_MIN 1 /* Minimum month of year */ +#define MONTH_MAX 12 /* Maximum month of year */ +#define YEAR_MIN 1 /* Minimum year able to compute */ +#define YEAR_MAX 9999 /* Maximum year able to compute */ +#define EASTER_MIN 30 /* Minimum year for computing Easter Sunday (29+1) */ +#define EASTER_MAX YEAR_MAX /* Maximum year for computing Easter Sunday */ +#define MONTH_COLS 6 /* Maximum number of columns of a month */ +#define VEC_BLOCK 42 /* Maximum number of elements per month (7*6) */ +#define VEC_ELEMS 504 /* Maximum number of elements per year (42*12) */ +#define CENTURY 1900 /* Operating system standard starting century, DON'T change ! */ + +/* +* The Gregorian Reformation date record. +*/ +typedef + struct greg_type + { + int year; /* Year of Gregorian Reformation */ + int month; /* Month of Gregorian Reformation */ + int first_day; /* First missing day of Reformation period */ + int last_day; /* Last missing day of Reformation period */ + } + Greg_struct; + -- cgit v1.2.3