datetime/type.c File Reference

#include <grass/datetime.h>

Include dependency graph for datetime/type.c:

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Functions
int	datetime_set_type (DateTime *dt, int mode, int from, int to, int fracsec)
int	datetime_get_type (const DateTime *dt, int *mode, int *from, int *to, int *fracsec)
int	datetime_is_valid_type (const DateTime *dt)
	Returns: 1 if datetime_check_type() returns 0 0 if not. More...
int	datetime_check_type (const DateTime *dt)
	checks the mode/from/to/fracsec in dt. Returns: More...
int	datetime_in_interval_year_month (int x)
int	datetime_in_interval_day_second (int x)
int	datetime_is_absolute (const DateTime *dt)
	Returns: 1 if dt.mode is absolute 0 if not (even if dt.mode is not defined) More...
int	datetime_is_relative (const DateTime *dt)
	Returns: 1 if dt.mode is relative 0 if not (even if dt.mode is not defined) More...

Function Documentation

datetime_check_type()

int datetime_check_type

(

const DateTime *

dt

)

checks the mode/from/to/fracsec in dt. Returns:

• 0: OK
• -1: mode is invalid - not one of {ABSOLUTE,RELATIVE}
• -2: from is invalid - not one of {YEAR,MONTH,DAY,HOUR,MINUTE,SECOND}
• -3: to is invalid - not one of {YEAR,MONTH,DAY,HOUR,MINUTE,SECOND}
• -4: from/to are reversed (from>to is illegal)
• -5: invalid from/to combination for RELATIVE mode: from in {YEAR,MONTH} but to is not, or from in {DAY,HOUR,MINUTE,SECOND} but to is not
• -6: from is invalid for ABSOLUTE mode (from != YEAR is illegal)
• -7: fracsec is negative (only if to==SECOND)

Parameters

dt

Returns

int

Definition at line 116 of file datetime/type.c.

References DATETIME_ABSOLUTE, datetime_error(), datetime_in_interval_day_second(), datetime_in_interval_year_month(), datetime_is_between(), DATETIME_RELATIVE, DATETIME_SECOND, DATETIME_YEAR, DateTime::fracsec, DateTime::from, DateTime::mode, and DateTime::to.

Referenced by datetime_is_valid_type().

datetime_get_type()

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

Definition at line 58 of file datetime/type.c.

datetime_in_interval_day_second()

int datetime_in_interval_day_second

(

int

x

)

Definition at line 156 of file datetime/type.c.

References DATETIME_DAY, datetime_is_between(), and DATETIME_SECOND.

Referenced by datetime_check_type().

datetime_in_interval_year_month()

int datetime_in_interval_year_month

(

int

x

)

Definition at line 151 of file datetime/type.c.

References datetime_is_between(), DATETIME_MONTH, and DATETIME_YEAR.

Referenced by datetime_check_type().

datetime_is_absolute()

int datetime_is_absolute

(

const DateTime *

dt

)

Returns: 1 if dt.mode is absolute 0 if not (even if dt.mode is not defined)

Parameters

dt

Returns

int

Definition at line 173 of file datetime/type.c.

References DATETIME_ABSOLUTE, and DateTime::mode.

Referenced by datetime_check_timezone(), datetime_format(), datetime_set_month(), and datetime_set_year().

datetime_is_relative()

int datetime_is_relative

(

const DateTime *

dt

)

Returns: 1 if dt.mode is relative 0 if not (even if dt.mode is not defined)

Parameters

dt

Returns

int

Definition at line 190 of file datetime/type.c.

References DATETIME_RELATIVE, and DateTime::mode.

datetime_is_valid_type()

int datetime_is_valid_type

(

const DateTime *

dt

)

Returns: 1 if datetime_check_type() returns 0 0 if not.

Parameters

dt

Returns

int

Definition at line 80 of file datetime/type.c.

References datetime_check_type().

Referenced by datetime_format().

datetime_set_type()

int datetime_set_type	(	DateTime *	dt,
		int	mode,
		int	from,
		int	to,
		int	fracsec
	)

• This routine must be called can be made with other datetime functions.
• initialize all the elements in dt.
• Set all values to zero except: tz (set to illegal value - 99*24) positive (set to 1 for positive)
• Set the type info in dt: mode, from, to, fracsec
• validate the mode/from/to/fracsec (according to the rules for the mode)
• return the return value from datetime_check_type(dt)

Parameters

mode
from
to
fracsec

Returns

int

Definition at line 37 of file datetime/type.c.

Referenced by datetime_change_timezone(), datetime_get_local_time(), and datetime_get_local_timezone().