sign.c File Reference

#include <grass/datetime.h>

Include dependency graph for sign.c:

Go to the source code of this file.

Functions
int	datetime_is_positive (const DateTime *dt)
	Returns: 1 if the Datetime is positive 0 otherwise.
int	datetime_is_negative (const DateTime *dt)
	Returns: 1 if the DateTime is negative 0 otherwise.
void	datetime_set_positive (DateTime *dt)
	Makes the DateTime positive. (A.D. for ABSOLUTE DateTimes)
void	datetime_set_negative (DateTime *dt)
	Makes the DateTime negative. (B.C. for ABSOLUTE DateTimes)
void	datetime_invert_sign (DateTime *dt)

Function Documentation

datetime_invert_sign()

void datetime_invert_sign

(

DateTime *

dt

)

Parameters

dt

Returns

void

Definition at line 71 of file sign.c.

References DateTime::positive.

Referenced by datetime_change_timezone(), and datetime_difference().

datetime_is_negative()

int datetime_is_negative

(

const DateTime *

dt

)

Returns: 1 if the DateTime is negative 0 otherwise.

Parameters

dt

Returns

int

Definition at line 34 of file sign.c.

References DateTime::positive.

Referenced by datetime_format().

datetime_is_positive()

int datetime_is_positive

(

const DateTime *

dt

)

Returns: 1 if the Datetime is positive 0 otherwise.

Parameters

dt

Returns

int

Definition at line 19 of file sign.c.

References DateTime::positive.

Referenced by datetime_check_day().

datetime_set_negative()

void datetime_set_negative

(

DateTime *

dt

)

Makes the DateTime negative. (B.C. for ABSOLUTE DateTimes)

Parameters

dt

Returns

void

Definition at line 60 of file sign.c.

References DateTime::positive.

datetime_set_positive()

void datetime_set_positive

(

DateTime *

dt

)

Makes the DateTime positive. (A.D. for ABSOLUTE DateTimes)

Parameters

dt

Returns

void

Definition at line 47 of file sign.c.

References DateTime::positive.