GRASS GIS 7 Programmer's Manual  7.7.svn(2018)-r73554
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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
dt
mode
from
to
fracsec
Returns
int

Definition at line 42 of file incr3.c.

References DATETIME_DAY, datetime_error_code(), datetime_in_interval_year_month(), datetime_is_absolute(), datetime_is_valid_type(), DATETIME_RELATIVE, DATETIME_YEAR, DateTime::fracsec, DateTime::from, and DateTime::to.

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 86 of file incr3.c.

References datetime_error_code(), datetime_get_increment_type(), and datetime_set_type().

Referenced by datetime_difference().