php-src/ext/calendar/cal_unix.c

/*
   +----------------------------------------------------------------------+
   | PHP version 4.0                                                      |
   +----------------------------------------------------------------------+
   | Copyright (c) 1997, 1998, 1999, 2000 The PHP Group                   |
   +----------------------------------------------------------------------+
   | This source file is subject to version 2.02 of the PHP license,      |
   | that is bundled with this package in the file LICENSE, and is        |
   | available at through the world-wide-web at                           |
   | http://www.php.net/license/2_02.txt.                                 |
   | If you did not receive a copy of the PHP license and are unable to   |
   | obtain it through the world-wide-web, please send a note to          |
   | license@php.net so we can mail you a copy immediately.               |
   +----------------------------------------------------------------------+
   | Authors: Shane Caraveo             <shane@caraveo.com>               | 
   |          Colin Viebrock            <cmv@easydns.com>                 |
   |          Hartmut Holzgraefe        <hartmut@six.de>                  |
   +----------------------------------------------------------------------+
 */
/* $Id: */

#include "php.h"
#include "php_calendar.h"
#include "sdncal.h"
#include <time.h>

/* {{{ proto int unixtojd([int timestamp])
   Convert UNIX timestamp to Julian Day */
PHP_FUNCTION(unixtojd)
{
  pval *timestamp;
  long jdate; 
  time_t t;
  struct tm *ta, tmbuf;
  int myargc=ZEND_NUM_ARGS();
	
  if ((myargc > 1) || (zend_get_parameters(ht,myargc, &timestamp) != SUCCESS)) {
    WRONG_PARAM_COUNT;
  }

  if(myargc==1) {
    convert_to_long(timestamp);
    t = timestamp->value.lval;
  } else {
    t = time(NULL);
  }

  ta = php_localtime_r(&t, &tmbuf);
  jdate = GregorianToSdn(ta->tm_year+1900, ta->tm_mon+1,ta->tm_mday);
  
  RETURN_LONG(jdate);
}
/* }}} */

/* {{{ proto int jdtounix(int jday)
   Convert Julian Day to UNIX timestamp */
PHP_FUNCTION(jdtounix)
{
  pval *jday;
  long uday;

  if ((ZEND_NUM_ARGS()!= 1) || (zend_get_parameters(ht,1, &jday) != SUCCESS)) {
    WRONG_PARAM_COUNT;
  }
  
  convert_to_long(jday);

  uday = jday->value.lval - 2440588 /* J.D. of 1.1.1970 */;
  
  if(uday<0)     RETURN_FALSE; /* before beginning of unix epoch */ 
  if(uday>24755) RETURN_FALSE; /* behind end of unix epoch */

  RETURN_LONG(uday*24*3600);
}
/* }}} */