incr3.c File Reference

#include <grass/datetime.h>

Include dependency graph for incr3.c:

Go to the source code of this file.

Functions
int	datetime_get_increment_type (const DateTime *dt, int *mode, int *from, int *to, int *fracsec)
	This returns the components of a type (mode/from/to/fracsec) that can be used to construct a DateTime object that can be used to increment the 'src'. Also see datetime_set_increment_type(). returns: 0 dt is legal !=0 why dt is illegal Implemented as follows: More...
int	datetime_set_increment_type (const DateTime *src, DateTime *incr)
	src must be legal This is a convenience routine which is implemented as follows: More...

Function Documentation

int datetime_get_increment_type	(	const DateTime *	dt,
		int *	mode,
		int *	from,
		int *	to,
		int *	fracsec
	)

This returns the components of a type (mode/from/to/fracsec) that can be used to construct a DateTime object that can be used to increment the 'src'. Also see datetime_set_increment_type(). returns: 0 dt is legal !=0 why dt is illegal Implemented as follows:

*mode    = RELATIVE
*to      = src.to
*fracsec = src.fracsec
if src.mode is ABSOLUTE
if src.to is in {YEAR,MONTH} then
*from = YEAR
if src.to is in {DAY,HOUR,MINUTE,SECOND} then 
*from = DAY
if src.mode is RELATIVE, then
*from = src.from

Parameters

mode
from
to
fracsec

Returns

int

Definition at line 41 of file incr3.c.

References datetime_error_code(), datetime_in_interval_year_month(), datetime_is_absolute(), and datetime_is_valid_type().

Referenced by datetime_set_increment_type().

int datetime_set_increment_type	(	const DateTime *	src,
		DateTime *	incr
	)

src must be legal This is a convenience routine which is implemented as follows:

int mode, from ,to;
int fracsec;
if(<b>datetime_get_increment_type</b>(src, &mode, &from, &to, &fracsec))
return <b>datetime_get_error_code()</b>;
return <b>datetime_set_type</b> (incr, mode, from, to, fracsec);

Timezone Timezones are represented in minutes from GMT in the range [-720,+780]. For a DateTime to have a timezone, it must be of type ABSOLUTE, and "to" must be in {MINUTE,SECOND}.

Parameters

src
incr

Returns

int

Definition at line 85 of file incr3.c.

References datetime_error_code(), datetime_get_increment_type(), datetime_set_type(), and tools::mode.

Referenced by datetime_difference().