--- /dev/null
+includedir = @includedir@/timing
+
+lib_LIBRARIES = libsgtiming.a
+
+include_HEADERS = \
+ fg_time.hxx \
+ geocoord.h \
+ timezone.h
+
+libsgtiming_a_SOURCES = \
+ fg_time.cxx \
+ geocoord.cxx \
+ lowleveltime.cxx lowleveltime.h \
+ timezone.cxx \
+ # event.cxx event.hxx \
+ # fg_timer.cxx fg_timer.hxx \
+ # light.cxx light.hxx \
+ # moonpos.cxx moonpos.hxx \
+ # sunpos.cxx sunpos.hxx \
+ # timestamp.hxx
+
+INCLUDES += -I$(top_builddir)
--- /dev/null
+// fg_time.cxx -- data structures and routines for managing time related stuff.
+//
+// Written by Curtis Olson, started August 1997.
+//
+// Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License as
+// published by the Free Software Foundation; either version 2 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+// General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+//
+// $Id$
+
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <simgear/compiler.h>
+
+#ifdef FG_HAVE_STD_INCLUDES
+# include <cmath>
+# include <cstdio>
+# include <cstdlib>
+# include <ctime>
+#else
+# include <math.h>
+# include <stdio.h>
+# include <stdlib.h>
+# include <time.h>
+#endif
+
+#ifdef HAVE_SYS_TIMEB_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 <simgear/constants.h>
+#include <simgear/debug/logstream.hxx>
+// #include <simgear/magvar/magvar.hxx>
+#include <simgear/misc/fgpath.hxx>
+
+// #include <FDM/flight.hxx>
+// #include <Main/options.hxx>
+// #include <Time/light.hxx>
+
+#include "fg_time.hxx"
+#include "timezone.h"
+#include "lowleveltime.h"
+// #include "moonpos.hxx"
+// #include "sunpos.hxx"
+
+
+#define DEGHR(x) ((x)/15.)
+#define RADHR(x) DEGHR(x*RAD_TO_DEG)
+
+
+// #define MK_TIME_IS_GMT 0 // default value
+// #define TIME_ZONE_OFFSET_WORK 0 // default value
+
+
+FGTime::FGTime( const string& root )
+{
+ if (cur_time_params) {
+ FG_LOG( FG_GENERAL, FG_ALERT,
+ "Error: only one instance of FGTime allowed" );
+ exit(-1);
+ }
+
+ cur_time_params = this;
+
+ FGPath zone( root );
+ zone.append( "Timezone" );
+ zone.append( "zone.tab" );
+
+ FG_LOG( FG_EVENT, FG_INFO, "Reading timezone info from: " << zone.str() );
+ tzContainer = new TimezoneContainer( zone.c_str() );
+ warp=0;
+ warp_delta=0;
+}
+
+
+FGTime::~FGTime()
+{
+ delete tzContainer;
+ delete zonename;
+}
+
+void FGTime::updateLocal( double lon, double lat, const string& root )
+{
+ time_t currGMT;
+ time_t aircraftLocalTime;
+ GeoCoord location( RAD_TO_DEG * lat, RAD_TO_DEG * lon );
+ GeoCoord* nearestTz = tzContainer->getNearest(location);
+ FGPath zone( root );
+ zone.append ("Timezone" );
+ zone.append ( nearestTz->getDescription() );
+ if ( zonename ) {
+ delete zonename;
+ }
+ zonename = strdup( zone.c_str() );
+ currGMT = get_gmt( gmtime(&cur_time) );
+ aircraftLocalTime = get_gmt( (fgLocaltime(&cur_time, zone.c_str())) );
+ localOffset = aircraftLocalTime - currGMT;
+ // cerr << "Using " << localOffset << " as local time offset Timezone is "
+ // << zonename << endl;
+}
+
+// Initialize the time dependent variables (maybe I'll put this in the
+// constructor later)
+void FGTime::init( double lon, double lat, const string& root,
+ time_t timeOffset, sgTimingOffsetType offsetType )
+{
+ FG_LOG( FG_EVENT, FG_INFO, "Initializing Time" );
+ gst_diff = -9999.0;
+ FG_LOG( FG_EVENT, FG_DEBUG,
+ "time offset = " << timeOffset );
+ // time_t timeOffset = current_options.get_time_offset();
+ // int offsetType = current_options.get_time_offset_type();
+
+ time_t currGMT;
+ time_t systemLocalTime;
+ time_t aircraftLocalTime;
+
+ // would it be better to put these sanity checks in the options
+ // parsing code? (CLO)
+
+ cur_time = time(NULL);
+
+ // printf ("Current greenwich mean time = %24s", asctime(gmtime(&cur_time)));
+ // printf ("Current local time = %24s", asctime(localtime(&cur_time)));
+ // time_t tmp = cur_time;
+ GeoCoord location( RAD_TO_DEG * lat, RAD_TO_DEG * lon );
+
+ GeoCoord* nearestTz = tzContainer->getNearest(location);
+
+ FGPath zone( root );
+ zone.append( "Timezone" );
+ zone.append( nearestTz->getDescription() );
+
+ // printf("Using %s for timezone information\n", buffer);
+ zonename = strdup( zone.c_str() );
+ //show( buffer.c_str(), cur_time, 1);
+ //printf ("Current greenwich mean time = %24s", asctime(gmtime(&cur_time)));
+ //printf ("Current local time = %24s", asctime(localtime(&cur_time)));
+ currGMT = get_gmt( gmtime(&cur_time) );
+ systemLocalTime = get_gmt( localtime(&cur_time) );
+ aircraftLocalTime = get_gmt( fgLocaltime(&cur_time, zone.c_str()) );
+ //printf ("Current greenwich mean time = %24s", asctime(gmtime(&cur_time)));
+ //printf ("Current local time = %24s", asctime(localtime(&cur_time)));
+
+ //printf("LT = %d\n", computerLocalTime);
+ // Okay, in principle, this trick allows to calculate the
+ // difference between GMT and localtime, in seconds.
+ // printf("Gmt = %d, SLT = %d, (difference = %d)\n", currGMT, systemLocalTime, (currGMT - systemLocalTime));
+ // printf("Gmt = %d, ALT = %d, (difference = %d)\n", currGMT, aircraftLocalTime, (currGMT - aircraftLocalTime));
+ // exit(1);
+ // Okay, we now have six possible scenarios
+ switch (offsetType)
+ {
+ case SG_TIME_SYS_OFFSET:
+ warp = timeOffset;
+ break;
+ case SG_TIME_GMT_OFFSET:
+ warp = timeOffset - (currGMT - systemLocalTime);
+ break;
+ case SG_TIME_LAT_OFFSET:
+ // warp = timeOffset - (currGMT - systemLocalTime +
+ // (currGMT - aircraftLocalTime));
+ warp = timeOffset - (aircraftLocalTime - systemLocalTime);
+ break;
+ case SG_TIME_SYS_ABSOLUTE:
+ warp = timeOffset - cur_time;
+ //printf("warp = %d\n", warp);
+ break;
+ case SG_TIME_GMT_ABSOLUTE:
+ warp = timeOffset - currGMT;
+ break;
+ case SG_TIME_LAT_ABSOLUTE:
+ warp = timeOffset - (aircraftLocalTime - systemLocalTime) -
+ cur_time;
+ break;
+ default:
+ printf("Unsupported type\n");
+ exit(1);
+ }
+
+ warp_delta = 0;
+ // pause = current_options.get_pause();
+}
+
+
+// given a date in months, mn, days, dy, years, yr, return the
+// modified Julian date (number of days elapsed since 1900 jan 0.5),
+// mjd. Adapted from Xephem.
+
+void FGTime::cal_mjd (int mn, double dy, int yr)
+{
+ //static double last_mjd, last_dy;
+ //double mjd;
+ //static int last_mn, last_yr;
+ int b, d, m, y;
+ long c;
+
+ if (mn == last_mn && yr == last_yr && dy == last_dy) {
+ mjd = last_mjd;
+ //return(mjd);
+ }
+
+ m = mn;
+ y = (yr < 0) ? yr + 1 : yr;
+ if (mn < 3) {
+ m += 12;
+ y -= 1;
+ }
+
+ if (yr < 1582 || (yr == 1582 && (mn < 10 || (mn == 10 && dy < 15)))) {
+ b = 0;
+ } else {
+ int a;
+ a = y/100;
+ b = 2 - a + a/4;
+ }
+
+ if (y < 0) {
+ c = (long)((365.25*y) - 0.75) - 694025L;
+ } else {
+ c = (long)(365.25*y) - 694025L;
+ }
+
+ d = (int)(30.6001*(m+1));
+
+ mjd = b + c + d + dy - 0.5;
+
+ last_mn = mn;
+ last_dy = dy;
+ last_yr = yr;
+ last_mjd = mjd;
+
+ //return(mjd);
+}
+
+
+// given an mjd, calculate greenwich mean sidereal time, gst
+void FGTime::utc_gst ()
+{
+ double day = floor(mjd-0.5)+0.5;
+ double hr = (mjd-day)*24.0;
+ double T, x;
+
+ T = ((int)(mjd - 0.5) + 0.5 - J2000)/36525.0;
+ x = 24110.54841 + (8640184.812866 + (0.093104 - 6.2e-6 * T) * T) * T;
+ x /= 3600.0;
+ gst = (1.0/SIDRATE)*hr + x;
+
+ FG_LOG( FG_EVENT, FG_DEBUG, " gst => " << gst );
+}
+
+
+// given Julian Date and Longitude (decimal degrees West) compute
+// Local Sidereal Time, in decimal hours.
+//
+// Provided courtesy of ecdowney@noao.edu (Elwood Downey)
+
+double FGTime::sidereal_precise (double lng)
+{
+ double lstTmp;
+
+ /* printf ("Current Lst on JD %13.5f at %8.4f degrees West: ",
+ mjd + MJD0, lng); */
+
+ // convert to required internal units
+ lng *= DEG_TO_RAD;
+
+ // compute LST and print
+ utc_gst();
+ lstTmp = gst - RADHR (lng);
+ lstTmp -= 24.0*floor(lstTmp/24.0);
+ // printf ("%7.4f\n", lstTmp);
+
+ // that's all
+ return (lstTmp);
+}
+
+
+// return a courser but cheaper estimate of sidereal time
+double FGTime::sidereal_course(double lng)
+{
+ //struct tm *gmt;
+ //double lstTmp;
+ time_t start_gmt, now;
+ double diff, part, days, hours, lstTmp;
+ char tbuf[64];
+
+ //gmt = t->gmt;
+ //now = t->cur_time;
+ now = cur_time;
+ start_gmt = get_gmt(gmt->tm_year, 2, 21, 12, 0, 0);
+
+ FG_LOG( FG_EVENT, FG_DEBUG, " COURSE: GMT = " << format_time(gmt, tbuf) );
+ FG_LOG( FG_EVENT, FG_DEBUG, " March 21 noon (GMT) = " << start_gmt );
+
+ diff = (now - start_gmt) / (3600.0 * 24.0);
+
+ FG_LOG( FG_EVENT, FG_DEBUG,
+ " Time since 3/21/" << gmt->tm_year << " GMT = " << diff );
+
+ part = fmod(diff, 1.0);
+ days = diff - part;
+ hours = gmt->tm_hour + gmt->tm_min/60.0 + gmt->tm_sec/3600.0;
+
+ lstTmp = (days - lng)/15.0 + hours - 12;
+
+ while ( lstTmp < 0.0 ) {
+ lstTmp += 24.0;
+ }
+
+ FG_LOG( FG_EVENT, FG_DEBUG,
+ " days = " << days << " hours = " << hours << " lon = "
+ << lng << " lst = " << lstTmp );
+
+ return(lstTmp);
+}
+
+
+// Update time variables such as gmt, julian date, and sidereal time
+void FGTime::update( double lon, double lat, double alt_m ) {
+ double gst_precise, gst_course;
+
+ FG_LOG( FG_EVENT, FG_DEBUG, "Updating time" );
+
+ // get current Unix calendar time (in seconds)
+ warp += warp_delta;
+ cur_time = time(NULL) + warp;
+ FG_LOG( FG_EVENT, FG_DEBUG,
+ " Current Unix calendar time = " << cur_time
+ << " warp = " << warp << " delta = " << warp_delta );
+
+#if 0
+ if ( warp_delta ) {
+ // time is changing so force an update
+ local_update_sky_and_lighting_params();
+ }
+#endif
+
+ // get GMT break down for current time
+ gmt = gmtime(&cur_time);
+ FG_LOG( FG_EVENT, FG_DEBUG,
+ " Current GMT = " << gmt->tm_mon+1 << "/"
+ << gmt->tm_mday << "/" << gmt->tm_year << " "
+ << gmt->tm_hour << ":" << gmt->tm_min << ":"
+ << gmt->tm_sec );
+
+ // calculate modified Julian date
+ // t->mjd = cal_mjd ((int)(t->gmt->tm_mon+1), (double)t->gmt->tm_mday,
+ // (int)(t->gmt->tm_year + 1900));
+ cal_mjd ((int)(gmt->tm_mon+1), (double)gmt->tm_mday,
+ (int)(gmt->tm_year + 1900));
+
+ // add in partial day
+ mjd += (gmt->tm_hour / 24.0) + (gmt->tm_min / (24.0 * 60.0)) +
+ (gmt->tm_sec / (24.0 * 60.0 * 60.0));
+
+ // convert "back" to Julian date + partial day (as a fraction of one)
+ jd = mjd + MJD0;
+ FG_LOG( FG_EVENT, FG_DEBUG, " Current Julian Date = " << jd );
+
+ // printf(" Current Longitude = %.3f\n", FG_Longitude * RAD_TO_DEG);
+
+ // Calculate local side real time
+ if ( gst_diff < -100.0 ) {
+ // first time through do the expensive calculation & cheap
+ // calculation to get the difference.
+ FG_LOG( FG_EVENT, FG_INFO, " First time, doing precise gst" );
+ gst_precise = gst = sidereal_precise(0.00);
+ gst_course = sidereal_course(0.00);
+
+ gst_diff = gst_precise - gst_course;
+
+ lst = sidereal_course(-(lon * RAD_TO_DEG)) + gst_diff;
+ } else {
+ // course + difference should drift off very slowly
+ gst = sidereal_course( 0.00 ) + gst_diff;
+ lst = sidereal_course( -(lon * RAD_TO_DEG)) + gst_diff;
+ }
+
+ FG_LOG( FG_EVENT, FG_DEBUG,
+ " Current lon=0.00 Sidereal Time = " << gst );
+ FG_LOG( FG_EVENT, FG_DEBUG,
+ " Current LOCAL Sidereal Time = " << lst << " ("
+ << sidereal_precise(-(lon * RAD_TO_DEG))
+ << ") (diff = " << gst_diff << ")" );
+}
+
+
+/******************************************************************
+ * The following are some functions that were included as FGTime
+ * members, although they currently don't make use of any of the
+ * class's variables. Maybe this'll change in the future
+ *****************************************************************/
+
+// Return time_t for Sat Mar 21 12:00:00 GMT
+//
+// On many systems it is ambiguous if mktime() assumes the input is in
+// GMT, or local timezone. To address this, a new function called
+// timegm() is appearing. It works exactly like mktime() but
+// explicitely interprets the input as GMT.
+//
+// timegm() is available and documented under FreeBSD. It is
+// available, but completely undocumented on my current Debian 2.1
+// distribution.
+//
+// In the absence of timegm() we have to guess what mktime() might do.
+//
+// Many older BSD style systems have a mktime() that assumes the input
+// time in GMT. But FreeBSD explicitly states that mktime() assumes
+// local time zone
+//
+// The mktime() on many SYSV style systems (such as Linux) usually
+// returns its result assuming you have specified the input time in
+// your local timezone. Therefore, in the absence if timegm() 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 FGTime::get_gmt(int year, int month, int day, int hour, int min, int sec)
+{
+ struct tm mt;
+
+ mt.tm_mon = month;
+ mt.tm_mday = day;
+ mt.tm_year = year;
+ mt.tm_hour = hour;
+ mt.tm_min = min;
+ mt.tm_sec = sec;
+ mt.tm_isdst = -1; // let the system determine the proper time zone
+
+ // For now we assume that if daylight is not defined in
+ // /usr/include/time.h that we have a machine with a mktime() that
+ // assumes input is in GMT ... this only matters if we are
+ // building on a system that does not have timegm()
+#if !defined(HAVE_DAYLIGHT)
+# define MK_TIME_IS_GMT 1
+#endif
+
+#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__ )
+# define TIMEZONE_OFFSET_WORKS 1
+# endif
+
+ long int start = mktime(&mt);
+
+ FG_LOG( FG_EVENT, FG_DEBUG, "start1 = " << start );
+ // the ctime() call can screw up time progression on some versions
+ // of Linux
+ // fgPrintf( FG_EVENT, FG_DEBUG, "start2 = %s", ctime(&start));
+ FG_LOG( FG_EVENT, FG_DEBUG, "(tm_isdst = " << mt.tm_isdst << ")" );
+
+ timezone = fix_up_timezone( timezone );
+
+# if defined( TIMEZONE_OFFSET_WORKS )
+ FG_LOG( FG_EVENT, FG_DEBUG,
+ "start = " << start << ", timezone = " << timezone );
+ return( start - timezone );
+# else // ! defined( TIMEZONE_OFFSET_WORKS )
+
+ daylight = mt.tm_isdst;
+ if ( daylight > 0 ) {
+ daylight = 1;
+ } else if ( daylight < 0 ) {
+ FG_LOG( FG_EVENT, FG_WARN,
+ "OOOPS, problem in fg_time.cxx, no daylight savings info." );
+ }
+
+ long int offset = -(timezone / 3600 - daylight);
+
+ FG_LOG( FG_EVENT, FG_DEBUG, " Raw time zone offset = " << timezone );
+ FG_LOG( FG_EVENT, FG_DEBUG, " Daylight Savings = " << daylight );
+ FG_LOG( FG_EVENT, FG_DEBUG, " Local hours from GMT = " << offset );
+
+ long int start_gmt = start - timezone + (daylight * 3600);
+
+ FG_LOG( FG_EVENT, FG_DEBUG, " March 21 noon (CST) = " << start );
+
+ return ( start_gmt );
+# endif // ! defined( TIMEZONE_OFFSET_WORKS )
+#endif // ! defined ( MK_TIME_IS_GMT )
+}
+
+// Fix up timezone if using ftime()
+long int FGTime::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
+}
+
+
+char* FGTime::format_time( const struct tm* p, char* buf )
+{
+ sprintf( buf, "%d/%d/%2d %d:%02d:%02d",
+ p->tm_mon, p->tm_mday, p->tm_year,
+ p->tm_hour, p->tm_min, p->tm_sec);
+ return buf;
+}
+
+
+#if 0
+// Force an update of the sky and lighting parameters
+void FGTime::local_update_sky_and_lighting_params( void ) {
+ fgUpdateSunPos();
+ fgUpdateMoonPos();
+ cur_light_params.Update();
+}
+#endif
+
+
+FGTime* FGTime::cur_time_params = 0;
--- /dev/null
+// fg_time.hxx -- data structures and routines for managing time related stuff.
+//
+// Written by Curtis Olson, started August 1997.
+//
+// Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License as
+// published by the Free Software Foundation; either version 2 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+// General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+//
+// $Id$
+
+
+#ifndef _FG_TIME_HXX
+#define _FG_TIME_HXX
+
+
+#ifndef __cplusplus
+# error This library requires C++
+#endif
+
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#ifdef HAVE_WINDOWS_H
+# include <windows.h>
+#endif
+
+#include <GL/glut.h>
+
+#include <simgear/compiler.h>
+
+#ifdef FG_HAVE_STD_INCLUDES
+# include <ctime>
+#else
+# include <time.h>
+#endif
+
+// #include <FDM/flight.hxx>
+
+#include "timezone.h"
+// #include "lowleveltime.h"
+
+
+enum sgTimingOffsetType {
+ SG_TIME_SYS_OFFSET = 0,
+ SG_TIME_GMT_OFFSET = 1,
+ SG_TIME_LAT_OFFSET = 2,
+ SG_TIME_SYS_ABSOLUTE = 3,
+ SG_TIME_GMT_ABSOLUTE = 4,
+ SG_TIME_LAT_ABSOLUTE = 5
+};
+
+
+// Define a structure containing time parameters
+class FGTime {
+
+private:
+ // tzContainer stores all the current Timezone control points/
+ TimezoneContainer* tzContainer;
+
+ //Store the current local timezone name;
+ char *zonename;
+
+ // Unix "calendar" time in seconds
+ time_t cur_time;
+
+ // Break down of GMT time
+ struct tm *gmt;
+
+ // Julian date
+ double jd;
+
+ // modified Julian date
+ double mjd;
+
+ double last_mjd, last_dy;
+ int last_mn, last_yr;
+
+ // side real time at prime meridian
+ double gst;
+
+ // local sidereal time
+ double lst;
+
+ // local offset to GMT
+ time_t localOffset;
+
+ // the difference between the precise sidereal time algorithm
+ // result and the course result. course + diff has good accuracy
+ // for the short term
+ double gst_diff;
+
+ // An offset in seconds from the true time. Allows us to adjust
+ // the effective time of day.
+ long int warp;
+
+ // How much to change the value of warp each iteration. Allows us
+ // to make time progress faster than normal.
+ long int warp_delta;
+
+public:
+
+ FGTime( const string& root );
+ ~FGTime();
+
+ inline double getJD() const { return jd; };
+ inline double getMjd() const { return mjd; };
+ inline double getLst() const { return lst; };
+ inline double getGst() const { return gst; };
+ inline time_t get_cur_time() const { return cur_time; };
+ inline struct tm* getGmt()const { return gmt; };
+
+ void adjust_warp(int val) { warp += val; };
+ void adjust_warp_delta(int val) { warp_delta += val; };
+
+ // Initialize the time dependent variables
+ void init( double lon, double lat, const string& root,
+ time_t timeOffset, sgTimingOffsetType offsetType );
+
+ // Update the time dependent variables
+ void update( double lon, double lat, double alt_m );
+ void updateLocal( double lon, double lat, const string& root );
+
+ void cal_mjd (int mn, double dy, int yr);
+ void utc_gst();
+ double sidereal_precise (double lng);
+ double sidereal_course(double lng);
+ static FGTime *cur_time_params;
+
+ // Some other stuff which were changed to FGTime members on
+ // questionable grounds -:)
+ // time_t get_start_gmt(int year);
+ time_t get_gmt(int year, int month, int day,
+ int hour, int minute, int second);
+ time_t get_gmt(struct tm* the_time);
+
+ char* format_time( const struct tm* p, char* buf );
+ long int fix_up_timezone( long int timezone_orig );
+
+ inline int get_warp_delta() const { return warp_delta; }
+};
+
+
+inline time_t FGTime::get_gmt(struct tm* the_time) // this is just a wrapper
+{
+ //printf("Using: %24s as input\n", asctime(the_time));
+ return get_gmt(the_time->tm_year,
+ the_time->tm_mon,
+ the_time->tm_mday,
+ the_time->tm_hour,
+ the_time->tm_min,
+ the_time->tm_sec);
+}
+
+
+#endif // _FG_TIME_HXX
--- /dev/null
+/* -*- Mode: C++ -*- *****************************************************
+ * geocoord.h
+ * Written by Durk Talsma. Started March 1998.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ **************************************************************************/
+
+/*************************************************************************
+ *
+ * This file defines a small and simple class to store geocentric
+ * coordinates. Basically, class GeoCoord is intended as a base class for
+ * any kind of of object, that can be categorized according to its
+ * location on earth, be it navaids, or aircraft. This class for originally
+ * written for FlightGear, in order to store Timezone control points.
+ *
+ ************************************************************************/
+#include "geocoord.h"
+#include <plib/sg.h>
+
+GeoCoord::GeoCoord(const GeoCoord& other)
+{
+ lat = other.lat;
+ lon = other.lon;
+}
+
+// double GeoCoord::getAngle(const GeoCoord& other) const
+// {
+// Vector first( getX(), getY(), getZ());
+// Vector secnd(other.getX(), other.getY(), other.getZ());
+// double
+// dot = VecDot(first, secnd),
+// len1 = first.VecLen(),
+// len2 = secnd.VecLen(),
+// len = len1 * len2,
+// angle = 0;
+// //printf ("Dot: %f, len1: %f len2: %f\n", dot, len1, len2);
+// /*Vector pPos = prevPos - Reference->prevPos;
+// Vector pVel = prevVel - Reference->prevVel;*/
+
+
+// if ( ( (dot / len) < 1) && (dot / len > -1) && len )
+// angle = acos(dot / len);
+// return angle;
+// }
+
+// GeoCoord* GeoCoordContainer::getNearest(const GeoCoord& ref) const
+// {
+// float angle, maxAngle = 180;
+
+// GeoCoordVectorConstIterator i, nearest;
+// for (i = data.begin(); i != data.end(); i++)
+// {
+// angle = RAD_TO_DEG * (*i)->getAngle(ref);
+// if (angle < maxAngle)
+// {
+// maxAngle = angle;
+// nearest = i;
+// }
+// }
+// return *nearest;
+// }
+
+
+GeoCoord* GeoCoordContainer::getNearest(const GeoCoord& ref) const
+{
+ sgVec3 first, secnd;
+ float dist, maxDist=SG_MAX;
+ sgSetVec3( first, ref.getX(), ref.getY(), ref.getZ());
+ GeoCoordVectorConstIterator i, nearest;
+ for (i = data.begin(); i != data.end(); i++)
+ {
+ sgSetVec3(secnd, (*i)->getX(), (*i)->getY(), (*i)->getZ());
+ dist = sgDistanceSquaredVec3(first, secnd);
+ if (dist < maxDist)
+ {
+ maxDist = dist;
+ nearest = i;
+ }
+ }
+ return *nearest;
+}
+
+
+GeoCoordContainer::~GeoCoordContainer()
+{
+ GeoCoordVectorIterator i = data.begin();
+ while (i != data.end())
+ delete *i++;
+}
--- /dev/null
+/* -*- Mode: C++ -*- *****************************************************
+ * geocoord.h
+ * Written by Durk Talsma. Started July 1999.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ **************************************************************************/
+
+/*************************************************************************
+ *
+ * This file defines a small and simple class to store geocentric
+ * coordinates. Basically, class GeoCoord is intended as a base class for
+ * any kind of of object, that can be categorized according to its
+ * location on earth, be it navaids, or aircraft. This class for originally
+ * written for FlightGear, in order to store Timezone control points.
+ *
+ ************************************************************************/
+
+
+#ifndef _GEOCOORD_H_
+#define _GEOCOORD_H_
+
+#include <simgear/compiler.h>
+
+
+#include <math.h>
+#include <string>
+#include STL_IOSTREAM
+//#include <streambuf> // looks like streambuf does not exist on linux.
+// But it looks like it isn't used anyways -:)
+#include <vector>
+
+FG_USING_NAMESPACE(std);
+
+#include <simgear/constants.h>
+
+class GeoCoord
+{
+protected:
+ float lat;
+ float lon;
+
+public:
+ GeoCoord() { lat = 0.0; lon = 0.0;};
+ GeoCoord(float la, float lo) { lat = la; lon = lo;};
+ GeoCoord(const GeoCoord& other);
+ virtual ~GeoCoord() {};
+
+ void set(float la, float lo) { lat = la; lon = lo; };
+ float getLat() const { return lat; };
+ float getLon() const { return lon; };
+ float getX() const { return cos(DEG_TO_RAD*lat) * cos(DEG_TO_RAD*lon); };
+ float getY() const { return cos(DEG_TO_RAD*lat) * sin(DEG_TO_RAD*lon); };
+ float getZ() const { return sin(DEG_TO_RAD*lat); };
+
+
+ //double getAngle(const GeoCoord& other) const;
+ virtual void print() {} ;
+ virtual char *getDescription() {return 0;};
+};
+
+typedef vector<GeoCoord*> GeoCoordVector;
+typedef vector<GeoCoord*>::iterator GeoCoordVectorIterator;
+typedef vector<GeoCoord*>::const_iterator GeoCoordVectorConstIterator;
+
+/************************************************************************
+ * GeoCoordContainer is a simple container class, that stores objects
+ * derived from GeoCoord. Basically, it is a wrapper around an STL vector,
+ * with some added functionality
+ ***********************************************************************/
+
+class GeoCoordContainer
+{
+protected:
+ GeoCoordVector data;
+
+public:
+ GeoCoordContainer() {};
+ virtual ~GeoCoordContainer();
+
+ const GeoCoordVector& getData() const { return data; };
+ GeoCoord* getNearest(const GeoCoord& ref) const;
+};
+
+
+#endif // _GEO_COORD_H_
--- /dev/null
+/* -*- Mode: C++ -*- *****************************************************
+ * Written by various people (I"ll look up the exact credits later)
+ * Modified by Durk Talsma, July 1999 for use in FlightGear
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ **************************************************************************/
+
+/********************************************************************
+ * This file redefines some low-level Unix-like time functions for *
+ * use with FlightGear. Most notably, localtime() is adapted to use *
+ * a custom timezone, in order to get the 'local' time for a given *
+ * aircraft's position, and not only for the current location of the*
+ * computer running the sim. *
+ * *
+ * Software adapted from glibc functions, by Durk Talsma. Started *
+ * July, 17, 1999. *
+ ********************************************************************/
+
+
+#include <time.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <errno.h>
+//#include <libc-lock.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
+#include "lowleveltime.h"
+
+
+/* BIG FAT WARNING: NOTICE THAT I HARDCODED ENDIANNES. PLEASE CHANGE THIS */
+#ifndef BIG_ENDIAN
+#define BIG_ENDIAN 4321
+#endif
+
+#ifndef LITTLE_ENDIAN
+#define LITTLE_ENDIAN 1234
+#endif
+
+#ifndef BYTE_ORDER
+#define BYTE_ORDER LITTLE_ENDIAN
+#endif
+
+
+#ifndef BYTE_ORDER
+#define BYTE_ORDER
+#endif
+
+/* END OF BIG FAT WARNING */
+
+//#include "tzfile.h"
+
+#define min(a, b) ((a) < (b) ? (a) : (b))
+#define max(a, b) ((a) > (b) ? (a) : (b))
+#define sign(x) ((x) < 0 ? -1 : 1)
+
+struct leap
+ {
+ time_t transition; /* Time the transition takes effect. */
+ long int change; /* Seconds of correction to apply. */
+ };
+
+/* Header for a list of buffers containing time zone strings. */
+struct tzstring_head
+{
+ struct tzstring_head *next;
+ /* The buffer itself immediately follows the header.
+ The buffer contains zero or more (possibly overlapping) strings.
+ The last string is followed by 2 '\0's instead of the usual 1. */
+};
+
+
+/* First in a list of buffers containing time zone strings.
+ All the buffers but the last are read-only. */
+static struct
+{
+ struct tzstring_head head;
+ char data[48];
+} tzstring_list;
+
+/* Size of the last buffer in the list, not counting its header. */
+static size_t tzstring_last_buffer_size = sizeof tzstring_list.data;
+
+
+static char *old_fgtz = NULL;
+static int use_fgtzfile = 1;
+static int fgdaylight;
+static char* fgtzname[2];
+static long int fgtimezone;
+
+
+static size_t num_transitions;
+static time_t *transitions = NULL;
+static unsigned char *type_idxs = NULL;
+static size_t num_types;
+static struct ttinfo *types = NULL;
+static char *zone_names = NULL;
+static size_t num_leaps;
+static struct leap *leaps = NULL;
+
+
+static void fgtzset_internal (int always, const char *tz);
+static int fgtz_compute(time_t timer, const struct tm *tm);
+static int fgcompute_change(fgtz_rule *rule, int year);
+static struct ttinfo *fgfind_transition (time_t timer);
+static void fgcompute_tzname_max (size_t chars);
+static inline int decode (const void *ptr);
+void fgtzfile_read (const char *file);
+static void offtime (const time_t *t, long int offset, struct tm *tp);
+static char *tzstring (const char* string);
+
+/* tz_rules[0] is standard, tz_rules[1] is daylight. */
+static fgtz_rule fgtz_rules[2];
+
+int fgtzfile_compute (time_t timer, int use_localtime,
+ long int *leap_correct, int *leap_hit);
+struct ttinfo
+ {
+ long int offset; /* Seconds east of GMT. */
+ unsigned char isdst; /* Used to set tm_isdst. */
+ unsigned char idx; /* Index into `zone_names'. */
+ unsigned char isstd; /* Transition times are in standard time. */
+ unsigned char isgmt; /* Transition times are in GMT. */
+ };
+
+
+
+/* How many days come before each month (0-12). */
+const unsigned short int mon_yday[2][13] =
+ {
+ /* Normal years. */
+ { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
+ /* Leap years. */
+ { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
+ };
+
+
+/* The C Standard says that localtime and gmtime return the same pointer. */
+struct tm _fgtmbuf;
+
+
+#ifndef isleap
+/* Nonzero if YEAR is a leap year (every 4 years,
+ except every 100th isn't, and every 400th is). */
+# define isleap(year) \
+ ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
+#endif
+
+
+
+
+/* Return the `struct tm' representation of *T in local time. */
+struct tm * fgLocaltime (const time_t *t, const char *tzName)
+{
+ return fgtz_convert (t, 1, &_fgtmbuf, tzName);
+}
+
+
+/* Return the `struct tm' representation of *TIMER in the local timezone.
+ Use local time if USE_LOCALTIME is nonzero, UTC otherwise. */
+struct tm * fgtz_convert (const time_t *timer, int use_localtime, struct tm *tp, const char *tzName)
+{
+ long int leap_correction;
+ long int offsetCorr; // ADDED TO RESOLVE NON-ANSI FIELDS IN struct tm
+ int leap_extra_secs;
+
+ if (timer == NULL)
+ {
+ //set_errno (EINVAL);
+ return NULL;
+ }
+
+ //libc_lock_lock (tzset_lock);
+
+ /* Update internal database according to current TZ setting.
+ POSIX.1 8.3.7.2 says that localtime_r is not required to set tzname.
+ This is a good idea since this allows at least a bit more parallelism.
+ By analogy we apply the same rule to gmtime_r. */
+ fgtzset_internal (tp == &_fgtmbuf, tzName);
+
+ if (use_fgtzfile)
+ {
+ if (! fgtzfile_compute (*timer, use_localtime,
+ &leap_correction, &leap_extra_secs))
+ tp = NULL;
+ }
+ else
+ {
+ offtime (timer, 0, tp);
+ if (! fgtz_compute (*timer, tp))
+ tp = NULL;
+ leap_correction = 0L;
+ leap_extra_secs = 0;
+ }
+
+ if (tp)
+ {
+ if (use_localtime)
+ {
+ tp->tm_isdst = fgdaylight;
+ //tp->tm_zone = fgtzname[fgdaylight]; // NON_ANSI
+ //tp->tm_gmtoff = -fgtimezone; // NON_ANSI
+ offsetCorr = -fgtimezone;
+ }
+ else
+ {
+ tp->tm_isdst = 0;
+ //tp->tm_zone = "GMT"; // NON_ANSI
+ //tp->tm_gmtoff = 0L; // NON_ANSI
+ offsetCorr = -fgtimezone;
+ }
+
+ //offtime (timer, tp->tm_gmtoff - leap_correction, tp);
+ offtime (timer, offsetCorr - leap_correction, tp);
+ tp->tm_sec += leap_extra_secs;
+ }
+
+ //libc_lock_unlock (tzset_lock);
+
+ return tp;
+}
+
+
+
+/* the following stuff is adapted from the tzCode package */
+
+static size_t longest;
+static char * abbr (struct tm * tmp);
+
+void show(const char *zone, time_t t, int v)
+{
+ struct tm * tmp;
+
+ (void) printf("%-*s ", (int) longest, zone);
+ if (v)
+ (void) printf("%.24s UTC = ", asctime(gmtime(&t)));
+ tmp = fgLocaltime(&t, zone);
+ (void) printf("%.24s", asctime(tmp));
+ if (*abbr(tmp) != '\0')
+ (void) printf(" %s", abbr(tmp));
+ if (v) {
+ (void) printf(" isdst=%d", tmp->tm_isdst);
+#ifdef TM_GMTOFF
+ (void) printf(" gmtoff=%ld", tmp->TM_GMTOFF);
+#endif /* defined TM_GMTOFF */
+ }
+ (void) printf("\n");
+}
+
+static char *abbr(struct tm *tmp)
+{
+ register char * result;
+ static char nada;
+
+ if (tmp->tm_isdst != 0 && tmp->tm_isdst != 1)
+ return &nada;
+ result = fgtzname[tmp->tm_isdst];
+ return (result == NULL) ? &nada : result;
+}
+
+
+
+/***********************************************************************/
+
+
+/* Interpret the TZ envariable. */
+static void fgtzset_internal (int always, const char *tz)
+{
+ time_t now;
+ time(&now);
+ static int is_initialized = 0;
+ //register const char *tz;
+ register size_t l;
+ char *tzbuf;
+ unsigned short int hh, mm, ss;
+ unsigned short int whichrule;
+
+ if (is_initialized && !always)
+ return;
+ is_initialized = 1;
+
+ /* Examine the TZ environment variable. */
+ //tz = getenv ("TZ");
+ if (tz == NULL)
+ /* No user specification; use the site-wide default. */
+ tz = TZDEFAULT;
+ else if (*tz == '\0')
+ /* User specified the empty string; use UTC explicitly. */
+ tz = "Universal";
+
+#ifdef MACOS
+ /* as you well know, mac paths contain leading colon, this code
+ messes things up.... */
+#else
+ /* A leading colon means "implementation defined syntax".
+ We ignore the colon and always use the same algorithm:
+ try a data file, and if none exists parse the 1003.1 syntax. */
+ if (tz && *tz == ':')
+ ++tz;
+#endif
+
+ /* Check whether the value changes since the last run. */
+ if (old_fgtz != NULL && tz != NULL && strcmp (tz, old_fgtz) == 0)
+ /* No change, simply return. */
+ return;
+
+ fgtz_rules[0].name = NULL;
+ fgtz_rules[1].name = NULL;
+
+ /* Save the value of `tz'. */
+ if (old_fgtz != NULL)
+ free (old_fgtz);
+ old_fgtz = tz ? strdup (tz) : NULL;
+
+ /* Try to read a data file. */
+ fgtzfile_read (tz);
+ if (use_fgtzfile)
+ return;
+ // The default behaviour of the originale tzset_internal (int always, char* tz)
+ // function is to set up a default timezone, in any casetz file_read() fails
+ // Currently this leads to problems, because it modidifies the system timezone
+ // and not the local aircraft timezone, contained in FlightGear. I could adapt
+ // this in future versions of this code, but doubt whether this is what we really
+ // want. So right now, exit when timezone information reading failed.
+ // Guess I'll change that to something like 12 * (FG_LON / 180.0)
+ //
+ // For now, I'll leave it like this.
+ else
+ {
+ printf ("Timezone reading failed\n");
+ exit(1);
+ }
+ // this emacs "comment out" function is cool!
+
+// // /* No data file found. Default to UTC if nothing specified. */
+// // printf ("1. Current local time = %24s", asctime(localtime(&now)));
+// if (tz == NULL || *tz == '\0')
+// {
+// fgtz_rules[0].name = fgtz_rules[1].name = "UTC";
+// fgtz_rules[0].type = fgtz_rules[1].type = fgtz_rule::J0;
+// fgtz_rules[0].m = fgtz_rules[0].n = fgtz_rules[0].d = 0;
+// fgtz_rules[1].m = fgtz_rules[1].n = fgtz_rules[1].d = 0;
+// fgtz_rules[0].secs = fgtz_rules[1].secs = 0;
+// fgtz_rules[0].offset = fgtz_rules[1].offset = 0L;
+// fgtz_rules[0].change = fgtz_rules[1].change = (time_t) -1;
+// fgtz_rules[0].computed_for = fgtz_rules[1].computed_for = 0;
+// return;
+// }
+
+// /* Clear out old state and reset to unnamed UTC. */
+// //printf ("2. Current local time = %24s", asctime(localtime(&now)));
+// memset (fgtz_rules, 0, sizeof fgtz_rules);
+// fgtz_rules[0].name = fgtz_rules[1].name = "";
+
+// /* Get the standard timezone name. */
+// tzbuf = malloc (strlen (tz) + 1);
+// if (! tzbuf)
+// {
+// /* Clear the old tz name so we will try again. */
+// free (old_fgtz);
+// old_fgtz = NULL;
+// return;
+// }
+// //printf ("3. Current local time = %24s", asctime(localtime(&now)));
+// if (sscanf (tz, "%[^0-9,+-]", tzbuf) != 1 ||
+// (l = strlen (tzbuf)) < 3)
+// {
+// free (tzbuf);
+// return;
+// }
+
+// fgtz_rules[0].name = tzstring (tzbuf);
+
+// tz += l;
+// //printf ("4. Current local time = %24s", asctime(localtime(&now)));
+// /* Figure out the standard offset from UTC. */
+// if (*tz == '\0' || (*tz != '+' && *tz != '-' && !isdigit (*tz)))
+// {
+// free (tzbuf);
+// return;
+// }
+// //printf ("5. Current local time = %24s", asctime(localtime(&now)));
+// if (*tz == '-' || *tz == '+')
+// fgtz_rules[0].offset = *tz++ == '-' ? 1L : -1L;
+// else
+// fgtz_rules[0].offset = -1L;
+// switch (sscanf (tz, "%hu:%hu:%hu", &hh, &mm, &ss))
+// {
+// default:
+// free (tzbuf);
+// return;
+// case 1:
+// mm = 0;
+// case 2:
+// ss = 0;
+// case 3:
+// break;
+// }
+// //printf ("6. Current local time = %24s", asctime(localtime(&now)));
+// fgtz_rules[0].offset *= (min (ss, 59) + (min (mm, 59) * 60) +
+// (min (hh, 23) * 60 * 60));
+
+// for (l = 0; l < 3; ++l)
+// {
+// while (isdigit(*tz))
+// ++tz;
+// if (l < 2 && *tz == ':')
+// ++tz;
+// }
+// //printf ("7. Current local time = %24s", asctime(localtime(&now)));
+// /* Get the DST timezone name (if any). */
+// if (*tz != '\0')
+// {
+// char *n = tzbuf + strlen (tzbuf) + 1;
+// if (sscanf (tz, "%[^0-9,+-]", n) != 1 ||
+// (l = strlen (n)) < 3)
+// goto done_names; /* Punt on name, set up the offsets. */
+// //printf ("7.1 Current local time = %24s", asctime(localtime(&now)));
+// fgtz_rules[1].name = tzstring (n);
+
+// tz += l;
+
+// /* Figure out the DST offset from GMT. */
+// if (*tz == '-' || *tz == '+')
+// fgtz_rules[1].offset = *tz++ == '-' ? 1L : -1L;
+// else
+// fgtz_rules[1].offset = -1L;
+// //printf ("7.2 Current local time = %24s", asctime(localtime(&now)));
+// switch (sscanf (tz, "%hu:%hu:%hu", &hh, &mm, &ss))
+// {
+// default:
+// /* Default to one hour later than standard time. */
+// fgtz_rules[1].offset = fgtz_rules[0].offset + (60 * 60);
+// break;
+
+// case 1:
+// mm = 0;
+// case 2:
+// ss = 0;
+// case 3:
+// fgtz_rules[1].offset *= (min (ss, 59) + (min (mm, 59) * 60) +
+// (min (hh, 23) * (60 * 60)));
+// break;
+// }
+// //printf ("7.3 Current local time = %24s", asctime(localtime(&now)));
+// for (l = 0; l < 3; ++l)
+// {
+// while (isdigit (*tz))
+// ++tz;
+// if (l < 2 && *tz == ':')
+// ++tz;
+// }
+// //printf ("7.4 Current local time = %24s", asctime(localtime(&now)));
+// if (*tz == '\0' || (tz[0] == ',' && tz[1] == '\0'))
+// {
+// /* There is no rule. See if there is a default rule file. */
+// //printf ("7.4.1 Current local time = %24s", asctime(localtime(&now)));
+// tzfile_default (fgtz_rules[0].name, fgtz_rules[1].name,
+// fgtz_rules[0].offset, fgtz_rules[1].offset);
+// //printf ("7.4.2 Current local time = %24s", asctime(localtime(&now)));
+// if (use_fgtzfile)
+// {
+// free (old_fgtz);
+// old_fgtz = NULL;
+// free (tzbuf);
+// return;
+// }
+// }
+// }
+// else
+// {
+// /* There is no DST. */
+// fgtz_rules[1].name = fgtz_rules[0].name;
+// free (tzbuf);
+// return;
+// }
+// //printf ("7.5 Current local time = %24s", asctime(localtime(&now)));
+// done_names:
+// //printf ("8. Current local time = %24s", asctime(localtime(&now)));
+// free (tzbuf);
+
+// /* Figure out the standard <-> DST rules. */
+// for (whichrule = 0; whichrule < 2; ++whichrule)
+// {
+// register fgtz_rule *tzr = &fgtz_rules[whichrule];
+
+// /* Ignore comma to support string following the incorrect
+// specification in early POSIX.1 printings. */
+// tz += *tz == ',';
+
+// /* Get the date of the change. */
+// if (*tz == 'J' || isdigit (*tz))
+// {
+// char *end;
+// tzr->type = *tz == 'J' ? fgtz_rule::J1 : fgtz_rule::J0;
+// if (tzr->type == fgtz_rule::J1 && !isdigit (*++tz))
+// return;
+// tzr->d = (unsigned short int) strtoul (tz, &end, 10);
+// if (end == tz || tzr->d > 365)
+// return;
+// else if (tzr->type == fgtz_rule::J1 && tzr->d == 0)
+// return;
+// tz = end;
+// }
+// else if (*tz == 'M')
+// {
+// int n;
+// tzr->type = fgtz_rule::M;
+// if (sscanf (tz, "M%hu.%hu.%hu%n",
+// &tzr->m, &tzr->n, &tzr->d, &n) != 3 ||
+// tzr->m < 1 || tzr->m > 12 ||
+// tzr->n < 1 || tzr->n > 5 || tzr->d > 6)
+// return;
+// tz += n;
+// }
+// else if (*tz == '\0')
+// {
+// /* United States Federal Law, the equivalent of "M4.1.0,M10.5.0". */
+// tzr->type = fgtz_rule::M;
+// if (tzr == &fgtz_rules[0])
+// {
+// tzr->m = 4;
+// tzr->n = 1;
+// tzr->d = 0;
+// }
+// else
+// {
+// tzr->m = 10;
+// tzr->n = 5;
+// tzr->d = 0;
+// }
+// }
+// else
+// return;
+// //printf ("9. Current local time = %24s", asctime(localtime(&now)));
+// if (*tz != '\0' && *tz != '/' && *tz != ',')
+// return;
+// else if (*tz == '/')
+// {
+// /* Get the time of day of the change. */
+// ++tz;
+// if (*tz == '\0')
+// return;
+// switch (sscanf (tz, "%hu:%hu:%hu", &hh, &mm, &ss))
+// {
+// default:
+// hh = 2; /* Default to 2:00 AM. */
+// case 1:
+// mm = 0;
+// case 2:
+// ss = 0;
+// case 3:
+// break;
+// }
+// for (l = 0; l < 3; ++l)
+// {
+// while (isdigit (*tz))
+// ++tz;
+// if (l < 2 && *tz == ':')
+// ++tz;
+// }
+// tzr->secs = (hh * 60 * 60) + (mm * 60) + ss;
+// }
+// else
+// /* Default to 2:00 AM. */
+// tzr->secs = 2 * 60 * 60;
+
+// tzr->computed_for = -1;
+// }
+// // printf ("10. Current local time = %24s", asctime(localtime(&now)));
+//
+}
+
+/************************************************************************/
+
+
+/* Figure out the correct timezone for *TIMER and TM (which must be the same)
+ and set `tzname', `timezone', and `daylight' accordingly.
+ Return nonzero on success, zero on failure. */
+size_t fgtzname_cur_max;
+
+static int fgtz_compute (time_t timer, const struct tm* tm)
+ // time_t timer;
+ // const struct tm *tm;
+{
+ if (! fgcompute_change (&fgtz_rules[0], 1900 + tm->tm_year) ||
+ ! fgcompute_change (&fgtz_rules[1], 1900 + tm->tm_year))
+ return 0;
+
+ fgdaylight = timer >= fgtz_rules[0].change && timer < fgtz_rules[1].change;
+ fgtimezone = -fgtz_rules[fgdaylight].offset;
+ fgtzname[0] = (char *) fgtz_rules[0].name;
+ fgtzname[1] = (char *) fgtz_rules[1].name;
+
+ {
+ /* Keep tzname_cur_max up to date. */
+ size_t len0 = strlen (fgtzname[0]);
+ size_t len1 = strlen (fgtzname[1]);
+ if (len0 > fgtzname_cur_max)
+ fgtzname_cur_max = len0;
+ if (len1 > fgtzname_cur_max)
+ fgtzname_cur_max = len1;
+ }
+
+ return 1;
+}
+
+/**********************************************************************/
+
+/* Figure out the exact time (as a time_t) in YEAR
+ when the change described by RULE will occur and
+ put it in RULE->change, saving YEAR in RULE->computed_for.
+ Return nonzero if successful, zero on failure. */
+static int fgcompute_change (fgtz_rule *rule, int year)
+ // tz_rule *rule;
+ // int year;
+{
+ register time_t t;
+ int y;
+
+ if (year != -1 && rule->computed_for == year)
+ /* Operations on times in 1969 will be slower. Oh well. */
+ return 1;
+
+ /* First set T to January 1st, 0:00:00 GMT in YEAR. */
+ t = 0;
+ for (y = 1970; y < year; ++y)
+ t += SECSPERDAY * (isleap (y) ? 366 : 365);
+
+ switch (rule->type)
+ {
+ case fgtz_rule::J1:
+ /* Jn - Julian day, 1 == January 1, 60 == March 1 even in leap years.
+ In non-leap years, or if the day number is 59 or less, just
+ add SECSPERDAY times the day number-1 to the time of
+ January 1, midnight, to get the day. */
+ t += (rule->d - 1) * SECSPERDAY;
+ if (rule->d >= 60 && isleap (year))
+ t += SECSPERDAY;
+ break;
+
+ case fgtz_rule::J0:
+ /* n - Day of year.
+ Just add SECSPERDAY times the day number to the time of Jan 1st. */
+ t += rule->d * SECSPERDAY;
+ break;
+
+ case fgtz_rule::M:
+ /* Mm.n.d - Nth "Dth day" of month M. */
+ {
+ register int i, d, m1, yy0, yy1, yy2, dow;
+ register const unsigned short int *myday =
+ &mon_yday[isleap (year)][rule->m];
+
+ /* First add SECSPERDAY for each day in months before M. */
+ t += myday[-1] * SECSPERDAY;
+
+ /* Use Zeller's Congruence to get day-of-week of first day of month. */
+ m1 = (rule->m + 9) % 12 + 1;
+ yy0 = (rule->m <= 2) ? (year - 1) : year;
+ yy1 = yy0 / 100;
+ yy2 = yy0 % 100;
+ dow = ((26 * m1 - 2) / 10 + 1 + yy2 + yy2 / 4 + yy1 / 4 - 2 * yy1) % 7;
+ if (dow < 0)
+ dow += 7;
+
+ /* DOW is the day-of-week of the first day of the month. Get the
+ day-of-month (zero-origin) of the first DOW day of the month. */
+ d = rule->d - dow;
+ if (d < 0)
+ d += 7;
+ for (i = 1; i < rule->n; ++i)
+ {
+ if (d + 7 >= myday[0] - myday[-1])
+ break;
+ d += 7;
+ }
+
+ /* D is the day-of-month (zero-origin) of the day we want. */
+ t += d * SECSPERDAY;
+ }
+ break;
+ }
+
+ /* T is now the Epoch-relative time of 0:00:00 GMT on the day we want.
+ Just add the time of day and local offset from GMT, and we're done. */
+
+ rule->change = t - rule->offset + rule->secs;
+ rule->computed_for = year;
+ return 1;
+}
+
+/*************************************************************************/
+
+int fgtzfile_compute (time_t timer, int use_localtime,
+ long int *leap_correct, int *leap_hit)
+{
+ register size_t i;
+
+ if (use_localtime)
+ {
+ struct ttinfo *info = fgfind_transition (timer);
+ fgdaylight = info->isdst;
+ fgtimezone = -info->offset;
+ for (i = 0;
+ i < num_types && i < sizeof (fgtzname) / sizeof (fgtzname[0]);
+ ++i)
+ fgtzname[types[i].isdst] = &zone_names[types[i].idx];
+ if (info->isdst < sizeof (fgtzname) / sizeof (fgtzname[0]))
+ fgtzname[info->isdst] = &zone_names[info->idx];
+ }
+
+ *leap_correct = 0L;
+ *leap_hit = 0;
+
+ /* Find the last leap second correction transition time before TIMER. */
+ i = num_leaps;
+ do
+ if (i-- == 0)
+ return 1;
+ while (timer < leaps[i].transition);
+
+ /* Apply its correction. */
+ *leap_correct = leaps[i].change;
+
+ if (timer == leaps[i].transition && /* Exactly at the transition time. */
+ ((i == 0 && leaps[i].change > 0) ||
+ leaps[i].change > leaps[i - 1].change))
+ {
+ *leap_hit = 1;
+ while (i > 0 &&
+ leaps[i].transition == leaps[i - 1].transition + 1 &&
+ leaps[i].change == leaps[i - 1].change + 1)
+ {
+ ++*leap_hit;
+ --i;
+ }
+ }
+
+ return 1;
+}
+
+/**************************************************************************/
+
+static struct ttinfo * fgfind_transition (time_t timer)
+{
+ size_t i;
+
+ if (num_transitions == 0 || timer < transitions[0])
+ {
+ /* TIMER is before any transition (or there are no transitions).
+ Choose the first non-DST type
+ (or the first if they're all DST types). */
+ i = 0;
+ while (i < num_types && types[i].isdst)
+ ++i;
+ if (i == num_types)
+ i = 0;
+ }
+ else
+ {
+ /* Find the first transition after TIMER, and
+ then pick the type of the transition before it. */
+ for (i = 1; i < num_transitions; ++i)
+ if (timer < transitions[i])
+ break;
+ i = type_idxs[i - 1];
+ }
+
+ return &types[i];
+}
+
+
+/**************************************************************************/
+void fgtzfile_read (const char *file)
+{
+ static const char default_tzdir[] = TZDIR;
+ size_t num_isstd, num_isgmt;
+ register FILE *f;
+ struct tzhead tzhead;
+ size_t chars;
+ register size_t i;
+ struct ttinfo *info;
+
+ use_fgtzfile = 0;
+
+ if (transitions != NULL)
+ free ((void *) transitions);
+ transitions = NULL;
+ if (type_idxs != NULL)
+ free ((void *) type_idxs);
+ type_idxs = NULL;
+ if (types != NULL)
+ free ((void *) types);
+ types = NULL;
+ if (zone_names != NULL)
+ free ((void *) zone_names);
+ zone_names = NULL;
+ if (leaps != NULL)
+ free ((void *) leaps);
+ leaps = NULL;
+
+ if (file == NULL)
+ /* No user specification; use the site-wide default. */
+ file = TZDEFAULT;
+ else if (*file == '\0')
+ /* User specified the empty string; use UTC with no leap seconds. */
+ return;
+ else
+ {
+ /* We must not allow to read an arbitrary file in a setuid
+ program. So we fail for any file which is not in the
+ directory hierachy starting at TZDIR
+ and which is not the system wide default TZDEFAULT. */
+ //if (libc_enable_secure
+ // && ((*file == '/'
+ // && memcmp (file, TZDEFAULT, sizeof TZDEFAULT)
+ // && memcmp (file, default_tzdir, sizeof (default_tzdir) - 1))
+ // || strstr (file, "../") != NULL))
+ /* This test is certainly a bit too restrictive but it should
+ catch all critical cases. */
+ //return;
+ }
+
+// if (*file != '/') // if a relative path is used, append what file points to
+// // to the path indicated by TZDIR.
+// {
+// const char *tzdir;
+// unsigned int len, tzdir_len;
+// char *_new;
+
+// tzdir = getenv ("TZDIR");
+// if (tzdir == NULL || *tzdir == '\0')
+// {
+// tzdir = default_tzdir;
+// tzdir_len = sizeof (default_tzdir) - 1;
+// }
+// else
+// tzdir_len = strlen (tzdir);
+// len = strlen (file) + 1;
+// _new = (char *) alloca (tzdir_len + 1 + len);
+// memcpy (_new, tzdir, tzdir_len);
+// _new[tzdir_len] = '/';
+// memcpy (&_new[tzdir_len + 1], file, len);
+// file = _new;
+// }
+
+ f = fopen (file, "rb");
+ if (f == NULL)
+ return;
+
+ if (fread ((void *) &tzhead, sizeof (tzhead), 1, f) != 1)
+ goto lose;
+
+ num_transitions = (size_t) decode (tzhead.tzh_timecnt);
+ num_types = (size_t) decode (tzhead.tzh_typecnt);
+ chars = (size_t) decode (tzhead.tzh_charcnt);
+ num_leaps = (size_t) decode (tzhead.tzh_leapcnt);
+ num_isstd = (size_t) decode (tzhead.tzh_ttisstdcnt);
+ num_isgmt = (size_t) decode (tzhead.tzh_ttisgmtcnt);
+
+ if (num_transitions > 0)
+ {
+ transitions = (time_t *) malloc (num_transitions * sizeof(time_t));
+ if (transitions == NULL)
+ goto lose;
+ type_idxs = (unsigned char *) malloc (num_transitions);
+ if (type_idxs == NULL)
+ goto lose;
+ }
+ if (num_types > 0)
+ {
+ types = (struct ttinfo *) malloc (num_types * sizeof (struct ttinfo));
+ if (types == NULL)
+ goto lose;
+ }
+ if (chars > 0)
+ {
+ zone_names = (char *) malloc (chars);
+ if (zone_names == NULL)
+ goto lose;
+ }
+ if (num_leaps > 0)
+ {
+ leaps = (struct leap *) malloc (num_leaps * sizeof (struct leap));
+ if (leaps == NULL)
+ goto lose;
+ }
+
+ if (sizeof (time_t) < 4)
+ abort ();
+
+ if (fread(transitions, 4, num_transitions, f) != num_transitions ||
+ fread(type_idxs, 1, num_transitions, f) != num_transitions)
+ goto lose;
+
+ /* Check for bogus indices in the data file, so we can hereafter
+ safely use type_idxs[T] as indices into `types' and never crash. */
+ for (i = 0; i < num_transitions; ++i)
+ if (type_idxs[i] >= num_types)
+ goto lose;
+
+ if (BYTE_ORDER != BIG_ENDIAN || sizeof (time_t) != 4)
+ {
+ /* Decode the transition times, stored as 4-byte integers in
+ network (big-endian) byte order. We work from the end of
+ the array so as not to clobber the next element to be
+ processed when sizeof (time_t) > 4. */
+ i = num_transitions;
+ while (i-- > 0)
+ transitions[i] = decode ((char *) transitions + i*4);
+ }
+
+ for (i = 0; i < num_types; ++i)
+ {
+ unsigned char x[4];
+ if (fread (x, 1, 4, f) != 4 ||
+ fread (&types[i].isdst, 1, 1, f) != 1 ||
+ fread (&types[i].idx, 1, 1, f) != 1)
+ goto lose;
+ if (types[i].idx >= chars) /* Bogus index in data file. */
+ goto lose;
+ types[i].offset = (long int) decode (x);
+ }
+
+ if (fread (zone_names, 1, chars, f) != chars)
+ goto lose;
+
+ for (i = 0; i < num_leaps; ++i)
+ {
+ unsigned char x[4];
+ if (fread (x, 1, sizeof (x), f) != sizeof (x))
+ goto lose;
+ leaps[i].transition = (time_t) decode (x);
+ if (fread (x, 1, sizeof (x), f) != sizeof (x))
+ goto lose;
+ leaps[i].change = (long int) decode (x);
+ }
+
+ for (i = 0; i < num_isstd; ++i)
+ {
+ int c = getc (f);
+ if (c == EOF)
+ goto lose;
+ types[i].isstd = c != 0;
+ }
+ while (i < num_types)
+ types[i++].isstd = 0;
+
+ for (i = 0; i < num_isgmt; ++i)
+ {
+ int c = getc (f);
+ if (c == EOF)
+ goto lose;
+ types[i].isgmt = c != 0;
+ }
+ while (i < num_types)
+ types[i++].isgmt = 0;
+
+ fclose (f);
+
+ info = fgfind_transition (0);
+ for (i = 0; i < num_types && i < sizeof (fgtzname) / sizeof (fgtzname[0]);
+ ++i)
+ fgtzname[types[i].isdst] = tzstring (&zone_names[types[i].idx]);
+ if (info->isdst < sizeof (fgtzname) / sizeof (fgtzname[0]))
+ fgtzname[info->isdst] = tzstring (&zone_names[info->idx]);
+
+ fgcompute_tzname_max (chars);
+
+ use_fgtzfile = 1;
+ return;
+
+ lose:;
+ fclose(f);
+}
+
+/****************************************************************************/
+static void fgcompute_tzname_max (size_t chars)
+{
+ extern size_t tzname_cur_max; /* Defined in tzset.c. */
+
+ const char *p;
+
+ p = zone_names;
+ do
+ {
+ const char *start = p;
+ while (*p != '\0')
+ ++p;
+ if ((size_t) (p - start) > fgtzname_cur_max)
+ fgtzname_cur_max = p - start;
+ } while (++p < &zone_names[chars]);
+}
+
+/**************************************************************************/
+
+//#include <endian.h>
+
+/* Decode the four bytes at PTR as a signed integer in network byte order. */
+static inline int decode (const void *ptr)
+{
+ if ((BYTE_ORDER == BIG_ENDIAN) && sizeof (int) == 4)
+ return *(const int *) ptr;
+ else
+ {
+ const unsigned char *p = (unsigned char *)ptr;
+ int result = *p & (1 << (CHAR_BIT - 1)) ? ~0 : 0;
+
+ result = (result << 8) | *p++;
+ result = (result << 8) | *p++;
+ result = (result << 8) | *p++;
+ result = (result << 8) | *p++;
+
+ return result;
+ }
+}
+
+
+
+#define SECS_PER_HOUR (60 * 60)
+#define SECS_PER_DAY (SECS_PER_HOUR * 24)
+
+/* Compute the `struct tm' representation of *T,
+ offset OFFSET seconds east of UTC,
+ and store year, yday, mon, mday, wday, hour, min, sec into *TP. */
+
+void offtime (const time_t *t, long int offset, struct tm *tp)
+ // const time_t *t;
+ // long int offset;
+ // struct tm *tp;
+{
+ register long int days, rem, y;
+ register const unsigned short int *ip;
+
+ days = *t / SECS_PER_DAY;
+ rem = *t % SECS_PER_DAY;
+ rem += offset;
+ while (rem < 0)
+ {
+ rem += SECS_PER_DAY;
+ --days;
+ }
+ while (rem >= SECS_PER_DAY)
+ {
+ rem -= SECS_PER_DAY;
+ ++days;
+ }
+ tp->tm_hour = rem / SECS_PER_HOUR;
+ rem %= SECS_PER_HOUR;
+ tp->tm_min = rem / 60;
+ tp->tm_sec = rem % 60;
+ /* January 1, 1970 was a Thursday. */
+ tp->tm_wday = (4 + days) % 7;
+ if (tp->tm_wday < 0)
+ tp->tm_wday += 7;
+ y = 1970;
+
+#define LEAPS_THRU_END_OF(y) ((y) / 4 - (y) / 100 + (y) / 400)
+
+ while (days < 0 || days >= (isleap (y) ? 366 : 365))
+ {
+ /* Guess a corrected year, assuming 365 days per year. */
+ long int yg = y + days / 365 - (days % 365 < 0);
+
+ /* Adjust DAYS and Y to match the guessed year. */
+ days -= ((yg - y) * 365
+ + LEAPS_THRU_END_OF (yg - 1)
+ - LEAPS_THRU_END_OF (y - 1));
+ y = yg;
+ }
+ tp->tm_year = y - 1900;
+ tp->tm_yday = days;
+ ip = mon_yday[isleap(y)];
+ for (y = 11; days < ip[y]; --y)
+ continue;
+ days -= ip[y];
+ tp->tm_mon = y;
+ tp->tm_mday = days + 1;
+}
+
+/* Allocate a time zone string with given contents.
+ The string will never be moved or deallocated.
+ However, its contents may be shared with other such strings. */
+char *tzstring (const char* string)
+ //const char *string;
+{
+ struct tzstring_head *h = &tzstring_list.head;
+ size_t needed;
+ char *p;
+
+ /* Look through time zone string list for a duplicate of this one. */
+ for (h = &tzstring_list.head; ; h = h->next)
+ {
+ for (p = (char *) (h + 1); p[0] | p[1]; ++p)
+ if (strcmp (p, string) == 0)
+ return p;
+ if (! h->next)
+ break;
+ }
+
+ /* No duplicate was found. Copy to the end of this buffer if there's room;
+ otherwise, append a large-enough new buffer to the list and use it. */
+ ++p;
+ needed = strlen (string) + 2; /* Need 2 trailing '\0's after last string. */
+
+ if ((size_t) ((char *) (h + 1) + tzstring_last_buffer_size - p) < needed)
+ {
+ size_t buffer_size = tzstring_last_buffer_size;
+ while ((buffer_size *= 2) < needed)
+ continue;
+ if (! (h = h->next = (struct tzstring_head *)malloc (sizeof *h + buffer_size)))
+ return NULL;
+ h->next = NULL;
+ tzstring_last_buffer_size = buffer_size;
+ p = (char *) (h + 1);
+ }
+
+ return strncpy (p, string, needed);
+}
--- /dev/null
+/* -*- Mode: C++ -*- *****************************************************
+ * lowleveltime.h
+ * Written by various people (I"ll look up the exact credits later)
+ * Modified by Durk Talsma, July 1999 for use in FlightGear
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ **************************************************************************/
+
+/********************************************************************
+ * This file redefines some low-level Unix-like time functions for *
+ * use with FlightGear. Most notably, localtime() is adapted to use *
+ * a custom timezone, in order to get the 'local' time for a given *
+ * aircraft's position, and not only for the current location of the*
+ * computer running the sim. *
+ * *
+ * Software adapted from glibc functions, by Durk Talsma. Started *
+ * July, 17, 1999. *
+ ********************************************************************/
+
+#ifndef _LOWLEVELTIME_H_
+#define _LOWLEVELTIME_H_
+
+#include <time.h>
+
+/* adapted from zdump.c */
+void show (const char *zone, time_t t, int v);
+
+/* adapted from <time.h> */
+struct tm * fgLocaltime (const time_t *t, const char *tzName);
+
+/* Prototype for the internal function to get information based on TZ. */
+extern struct tm *fgtz_convert (const time_t *t, int use_localtime,
+ struct tm *tp, const char *tzName);
+
+/* This structure contains all the information about a
+ timezone given in the POSIX standard TZ envariable. */
+typedef struct
+ {
+ const char *name;
+
+ /* When to change. */
+ enum { J0, J1, M } type; /* Interpretation of: */
+ unsigned short int m, n, d; /* Month, week, day. */
+ unsigned int secs; /* Time of day. */
+
+ long int offset; /* Seconds east of GMT (west if < 0). */
+
+ /* We cache the computed time of change for a
+ given year so we don't have to recompute it. */
+ time_t change; /* When to change to this zone. */
+ int computed_for; /* Year above is computed for. */
+ } fgtz_rule;
+
+struct tzhead {
+ char tzh_magic[4]; /* TZ_MAGIC */
+ char tzh_reserved[16]; /* reserved for future use */
+ char tzh_ttisgmtcnt[4]; /* coded number of trans. time flags */
+ char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */
+ char tzh_leapcnt[4]; /* coded number of leap seconds */
+ char tzh_timecnt[4]; /* coded number of transition times */
+ char tzh_typecnt[4]; /* coded number of local time types */
+ char tzh_charcnt[4]; /* coded number of abbr. chars */
+};
+
+
+/* Defined in mktime.c. */
+extern const unsigned short int mon_yday[2][13];
+
+#ifndef TZDIR
+#define TZDIR "/usr/local/etc/zoneinfo" /* Time zone object file directory */
+#endif /* !defined TZDIR */
+
+
+
+#ifndef TZDEFAULT
+#define TZDEFAULT "localtime"
+#endif /* !defined TZDEFAULT */
+
+#define SECSPERMIN 60
+#define MINSPERHOUR 60
+#define HOURSPERDAY 24
+#define DAYSPERWEEK 7
+#define DAYSPERNYEAR 365
+#define DAYSPERLYEAR 366
+#define SECSPERHOUR (SECSPERMIN * MINSPERHOUR)
+#define SECSPERDAY ((long) SECSPERHOUR * HOURSPERDAY)
+#define MONSPERYEAR 12
+
+#define TM_SUNDAY 0
+#define TM_MONDAY 1
+#define TM_TUESDAY 2
+#define TM_WEDNESDAY 3
+#define TM_THURSDAY 4
+#define TM_FRIDAY 5
+#define TM_SATURDAY 6
+
+#define TM_JANUARY 0
+#define TM_FEBRUARY 1
+#define TM_MARCH 2
+#define TM_APRIL 3
+#define TM_MAY 4
+#define TM_JUNE 5
+#define TM_JULY 6
+#define TM_AUGUST 7
+#define TM_SEPTEMBER 8
+#define TM_OCTOBER 9
+#define TM_NOVEMBER 10
+#define TM_DECEMBER 11
+
+#define TM_YEAR_BASE 1900
+
+#define EPOCH_YEAR 1970
+#define EPOCH_WDAY TM_THURSDAY
+
+#endif
--- /dev/null
+/* -*- Mode: C++ -*- *****************************************************
+ * timezone.cc
+ * Written by Durk Talsma. Started July 1999.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ **************************************************************************/
+
+/*************************************************************************
+ *
+ * Timezone is derived from geocoord, and stores the timezone centerpoint,
+ * as well as the countrycode and the timezone descriptor. The latter is
+ * used in order to get the local time.
+ *
+ ************************************************************************/
+#include <stdio.h>
+#include "timezone.h"
+
+
+Timezone::Timezone(float la, float lo, char* cc, char* desc) :
+ GeoCoord(la, lo)
+{
+ countryCode = strdup(cc);
+ descriptor = strdup(desc);
+}
+
+/* Build a timezone object from a textline in zone.tab */
+Timezone::Timezone(const char *infoString) :
+ GeoCoord()
+{
+ int i = 0;
+ while (infoString[i] != '\t')
+ i++;
+ char buffer[128];
+ char latlon[128];
+ strncpy(buffer, infoString, i);
+ buffer[i] = 0;
+ countryCode = strdup(buffer);
+ i ++;
+ int start = i;
+ while (infoString[i] != '\t')
+ i++;
+ int size = i - start;
+ strncpy(latlon, (&infoString[start]), size);
+ latlon[size] = 0;
+ char sign;
+ sign = latlon[0];
+ strncpy(buffer, &latlon[1], 2);
+ lat = atof(buffer);
+ strncpy(buffer, &latlon[3], 2);
+ lat += (atof(buffer) / 60);
+ int nextPos;
+ if (strlen(latlon) > 12)
+ {
+ nextPos = 7;
+ strncpy(buffer, &latlon[5], 2);
+ lat += (atof(buffer) / 3600.0);
+ }
+ else
+ nextPos = 5;
+ if (sign == '-')
+ lat = -lat;
+
+ sign = latlon[nextPos];
+ nextPos++;
+ strncpy(buffer, &latlon[nextPos], 3);
+ lon = atof(buffer);
+ nextPos += 3;
+ strncpy(buffer, &latlon[nextPos], 2);
+ buffer[2] = 0;
+
+ lon += (atof(buffer) / 60);
+ if (strlen(latlon) > 12)
+ {
+ nextPos += 2;
+ strncpy(buffer, &latlon[nextPos], 2);
+ lon += (atof (buffer) / 3600.00);
+ }
+ if (sign == '-')
+ lon = -lon;
+ i ++;
+ start = i;
+ while (!((infoString[i] == '\t') || (infoString[i] == '\n')))
+ i++;
+ size = i - start;
+ strncpy(buffer, (&infoString[start]), size);
+ buffer[size] = 0;
+ descriptor = strdup(buffer);
+}
+
+/* the copy constructor */
+Timezone::Timezone(const Timezone& other)
+{
+ lat = other.getLat();
+ lon = other.getLon();
+ countryCode = strdup(other.countryCode);
+ descriptor = strdup(other.descriptor);
+}
+
+
+/********* Member functions for TimezoneContainer class ********/
+
+TimezoneContainer::TimezoneContainer(const char *filename)
+{
+ char buffer[256];
+ FILE* infile = fopen(filename, "r");
+ if (!(infile))
+ {
+ fprintf(stderr, "Unable to open file %s\n", filename);
+ exit(1);
+ }
+ else
+ {
+
+ while (1)
+ {
+ fgets(buffer, 256, infile);
+ if (feof(infile))
+ break;
+ for (int i = 0; i < 256; i++)
+ {
+ if (buffer[i] == '#')
+ buffer[i] = 0;
+ }
+ if (buffer[0])
+ {
+ data.push_back(new Timezone(buffer));
+ }
+ }
+ }
+}
+
+TimezoneContainer::~TimezoneContainer()
+{
+}
--- /dev/null
+/* -*- Mode: C++ -*- *****************************************************
+ * timezone.h
+ * Written by Durk Talsma. Started July 1999.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ **************************************************************************/
+
+/*************************************************************************
+ *
+ * Timezone is derived from geocoord, and stores the timezone centerpoint,
+ * as well as the countrycode and the timezone descriptor. The latter is
+ * used in order to get the local time.
+ *
+ ************************************************************************/
+
+#ifndef _TIMEZONE_H_
+#define _TIMEZONE_H_
+
+#include "geocoord.h"
+#include <stdio.h>
+
+class Timezone : public GeoCoord
+{
+private:
+ char* countryCode;
+ char* descriptor;
+
+public:
+ Timezone() :
+ GeoCoord()
+ {
+ countryCode = 0;
+ descriptor = 0;
+ };
+ Timezone(float la, float lo, char* cc, char* desc);
+ Timezone(const char *infoString);
+ Timezone(const Timezone &other);
+ virtual ~Timezone() { delete [] countryCode; delete [] descriptor; };
+
+
+ virtual void print() { printf("%s", descriptor);};
+ virtual char * getDescription() { return descriptor; };
+};
+
+/************************************************************************
+ * Timezone container is derived from GeoCoordContainer, and has some
+ * added functionality.
+ ************************************************************************/
+
+class TimezoneContainer : public GeoCoordContainer
+{
+ public:
+ TimezoneContainer(const char *filename);
+ virtual ~TimezoneContainer();
+};
+
+
+
+#endif // _TIMEZONE_H_
projects / simgear.git / commitdiff