php-src/ext/calendar/cal_unix.c

/*
   +----------------------------------------------------------------------+
   | PHP Version 5                                                        |
   +----------------------------------------------------------------------+
   | Copyright (c) 1997-2006 The PHP Group                                |
   +----------------------------------------------------------------------+
   | This source file is subject to version 3.01 of the PHP license,      |
   | that is bundled with this package in the file LICENSE, and is        |
   | available through the world-wide-web at the following url:           |
   | http://www.php.net/license/3_01.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            <colin@easydns.com>               |
   |          Hartmut Holzgraefe        <hholzgra@php.net>                |
   +----------------------------------------------------------------------+
 */
/* $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)
{
  time_t timestamp;
  long jdate, t;
  struct tm *ta, tmbuf;
	
  if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|l", &t) == FAILURE) {
    return;
  }

  if (ZEND_NUM_ARGS()) {
    timestamp = (time_t) t;
  } else {
    timestamp = time(NULL);
  }

  if (timestamp < 0) {
	RETURN_FALSE;
  }

  ta = php_localtime_r(&timestamp, &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)
{
  long uday, jday;

  if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l", &jday) != SUCCESS) {
    return;
  }
  
  uday = jday - 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);
}
/* }}} */

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