datetime_functions.c

/*
 * datetime_functions.c --
 *
 * This file defines new functions for the time and date data types.
 *
 * Copyright (c) 1996, Massimo Dal Zotto <dz@cs.unitn.it>
 */

#include <time.h>

#include "postgres.h"
#include "utils/palloc.h"
#include "utils/datetime.h"


TimeADT *time_difference(TimeADT * time1, TimeADT * time2)
{
    TimeADT *result = (TimeADT *) palloc(sizeof(TimeADT));
    *result = *time1 - *time2;
    return (result);
}

TimeADT *currenttime()
{
    time_t current_time;
    struct tm *tm;
    TimeADT *result = (TimeADT *) palloc(sizeof(TimeADT));

    current_time = time(NULL);
    tm = localtime(&current_time);
    *result = ((((tm->tm_hour*60)+tm->tm_min)*60)+tm->tm_sec);
    return (result);
}
DateADT currentdate()
{
    time_t current_time;
    struct tm *tm;
    DateADT result;
    current_time = time(NULL);
    tm = localtime(&current_time);

    result = date2j(tm->tm_year,tm->tm_mon + 1,tm->tm_mday) -
	 date2j(100,1,1);
    return (result);
}
int4 hours(TimeADT * time)
{
    return(*time / (60*60));
}

int4 minutes(TimeADT * time)
{
    return(((int) (*time / 60)) % 60);
}

int4 seconds(TimeADT * time)
{
    return(((int) *time) % 60);
}
int4 day(DateADT *date)
{
    struct tm tm;

    j2date( (*date + date2j(2000,1,1)),
      &tm.tm_year, &tm.tm_mon, &tm.tm_mday);

    return (tm.tm_mday);
}
int4 month(DateADT *date)
{
    struct tm tm;

    j2date( (*date + date2j(2000,1,1)),
      &tm.tm_year, &tm.tm_mon, &tm.tm_mday);

    return (tm.tm_mon);
}
int4 year(DateADT *date)
{
    struct tm tm;

    j2date( (*date + date2j(2000,1,1)),
      &tm.tm_year, &tm.tm_mon, &tm.tm_mday);

    return (tm.tm_year);
}
int4 asminutes(TimeADT * time)
{
    int seconds = (int) *time;

    return (seconds / 60);
}
int4 asseconds(TimeADT * time)
{
    int seconds = (int) *time;

    return (seconds);
}