168 lines
4.6 KiB
C++
168 lines
4.6 KiB
C++
// test the systems mktime() function
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif
|
|
|
|
#ifdef HAVE_WINDOWS_H
|
|
# include <windows.h>
|
|
#endif
|
|
|
|
#include <math.h>
|
|
#include <stdio.h>
|
|
#include <time.h>
|
|
|
|
#ifdef HAVE_SYS_TIMEB_H
|
|
# include <sys/types.h>
|
|
# include <sys/timeb.h> // for ftime() and struct timeb
|
|
#endif
|
|
#ifdef HAVE_UNISTD_H
|
|
# include <unistd.h> // for gettimeofday()
|
|
#endif
|
|
#ifdef HAVE_SYS_TIME_H
|
|
# include <sys/time.h> // for get/setitimer, gettimeofday, struct timeval
|
|
#endif
|
|
|
|
#include "test-mktime.hxx"
|
|
|
|
#define LST_MAGIC_TIME_1998 890481600
|
|
|
|
// For now we assume that if daylight is not defined in
|
|
// /usr/include/time.h that we have a machine with a BSD behaving
|
|
// mktime()
|
|
#if !defined(HAVE_DAYLIGHT)
|
|
# define MK_TIME_IS_GMT 1
|
|
#endif
|
|
|
|
|
|
// Fix up timezone if using ftime()
|
|
long int fix_up_timezone( long int timezone_orig ) {
|
|
#if !defined( HAVE_GETTIMEOFDAY ) && defined( HAVE_FTIME )
|
|
// ftime() needs a little extra help finding the current timezone
|
|
struct timeb current;
|
|
ftime(¤t);
|
|
return( current.timezone * 60 );
|
|
#else
|
|
return( timezone_orig );
|
|
#endif
|
|
}
|
|
|
|
|
|
// A printout function suitable for the test suite to replace printf().
|
|
int printout(const char *text, ...)
|
|
{
|
|
std::cout << text;
|
|
return 0;
|
|
}
|
|
|
|
|
|
// Return time_t for Sat Mar 21 12:00:00 GMT
|
|
//
|
|
// I believe the mktime() has a SYSV vs. BSD behavior difference.
|
|
//
|
|
// The BSD style mktime() is nice because it returns its result
|
|
// assuming you have specified the input time in GMT
|
|
//
|
|
// The SYSV style mktime() is a pain because it returns its result
|
|
// assuming you have specified the input time in your local timezone.
|
|
// Therefore you have to go to extra trouble to convert back to GMT.
|
|
//
|
|
// If you are having problems with incorrectly positioned astronomical
|
|
// bodies, this is a really good place to start looking.
|
|
|
|
time_t get_start_gmt(int year) {
|
|
struct tm mt;
|
|
|
|
mt.tm_mon = 2;
|
|
mt.tm_mday = 21;
|
|
mt.tm_year = year;
|
|
mt.tm_hour = 12;
|
|
mt.tm_min = 0;
|
|
mt.tm_sec = 0;
|
|
mt.tm_isdst = -1; // let the system determine the proper time zone
|
|
|
|
#if defined( HAVE_TIMEGM )
|
|
return ( timegm(&mt) );
|
|
#elif defined( MK_TIME_IS_GMT )
|
|
return ( mktime(&mt) );
|
|
#else // ! defined ( MK_TIME_IS_GMT )
|
|
|
|
// timezone seems to work as a proper offset for Linux & Solaris
|
|
# if defined( __linux__ ) || defined(__sun) || defined( __CYGWIN__ )
|
|
# define TIMEZONE_OFFSET_WORKS 1
|
|
# endif
|
|
|
|
#if defined(__CYGWIN__)
|
|
#define TIMEZONE _timezone
|
|
#else
|
|
#define TIMEZONE timezone
|
|
#endif
|
|
|
|
time_t start = mktime(&mt);
|
|
|
|
printout("start1 = %ld\n", start);
|
|
printout("start2 = %s", ctime(&start));
|
|
printout("(tm_isdst = %d)\n", mt.tm_isdst);
|
|
|
|
TIMEZONE = fix_up_timezone( TIMEZONE );
|
|
|
|
# if defined( TIMEZONE_OFFSET_WORKS )
|
|
printout("start = %ld, timezone = %ld\n", start, TIMEZONE);
|
|
return( start - TIMEZONE );
|
|
# else // ! defined( TIMEZONE_OFFSET_WORKS )
|
|
|
|
daylight = mt.tm_isdst;
|
|
if ( daylight > 0 ) {
|
|
daylight = 1;
|
|
} else if ( daylight < 0 ) {
|
|
printout("OOOPS, problem in fg_time.cxx, no daylight savings info.\n");
|
|
}
|
|
|
|
long int offset = -(TIMEZONE / 3600 - daylight);
|
|
|
|
printout(" Raw time zone offset = %ld\n", TIMEZONE);
|
|
printout(" Daylight Savings = %d\n", daylight);
|
|
printout(" Local hours from GMT = %ld\n", offset);
|
|
|
|
long int start_gmt = start - TIMEZONE + (daylight * 3600);
|
|
|
|
printout(" March 21 noon (CST) = %ld\n", start);
|
|
|
|
return ( start_gmt );
|
|
# endif // ! defined( TIMEZONE_OFFSET_WORKS )
|
|
#endif // ! defined ( MK_TIME_IS_GMT )
|
|
}
|
|
|
|
|
|
// The original test-mktime test.
|
|
void MktimeTests::testMktime()
|
|
{
|
|
time_t start_gmt;
|
|
|
|
start_gmt = get_start_gmt(98);
|
|
|
|
|
|
if ( start_gmt == LST_MAGIC_TIME_1998 ) {
|
|
printout("Time test = PASSED\n\n");
|
|
#ifdef HAVE_TIMEGM
|
|
printout("You have timegm() which is just like mktime() except that\n");
|
|
printout("it explicitely expects input in GMT ... lucky you!\n");
|
|
#elif MK_TIME_IS_GMT
|
|
printout("You don't seem to have timegm(), but mktime() seems to\n");
|
|
printout("assume input is GMT on your system ... I guess that works\n");
|
|
#else
|
|
printout("mktime() assumes local time zone on your system, but we can\n");
|
|
printout("compensate just fine.\n");
|
|
#endif
|
|
} else {
|
|
printout("Time test = FAILED\n\n");
|
|
printout("There is likely a problem with mktime() on your system.\n");
|
|
printout("This will cause the sun/moon/stars/planets to be in the\n");
|
|
printout("wrong place in the sky and the rendered time of day will be\n");
|
|
printout("incorrect.\n\n");
|
|
printout("Please report this to flightgear-devel@lists.sourceforge.net so we can work to fix\n");
|
|
printout("the problem on your platform.\n");
|
|
}
|
|
CPPUNIT_ASSERT_EQUAL(LST_MAGIC_TIME_1998, (int)start_gmt);
|
|
}
|