X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=simgear%2Ftiming%2Fsg_time.cxx;h=d2823b7794a9738efe26349a900fc11d154dc2e7;hb=d0d7878e0a4cc7871276db37517faf0c61693740;hp=3fca4a8b0ef94ac893b2591e8b0cbd42ef0c3fcf;hpb=a4d60e7bd6e9ab86e6152ed94a1b928e90b508e1;p=simgear.git diff --git a/simgear/timing/sg_time.cxx b/simgear/timing/sg_time.cxx index 3fca4a8b..d2823b77 100644 --- a/simgear/timing/sg_time.cxx +++ b/simgear/timing/sg_time.cxx @@ -4,31 +4,33 @@ // // 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 library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Library 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 +// This library 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. +// Library 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. +// You should have received a copy of the GNU Library General Public +// License along with this library; if not, write to the +// Free Software Foundation, Inc., 59 Temple Place - Suite 330, +// Boston, MA 02111-1307, USA. // // $Id$ #ifdef HAVE_CONFIG_H -# include +# include #endif #include -#ifdef FG_HAVE_STD_INCLUDES -# include +#include // for errno + +#ifdef SG_HAVE_STD_INCLUDES # include # include # include @@ -36,22 +38,23 @@ # include # include # include -# include #endif +#ifdef HAVE_SYS_TIME_H +# include // for get/setitimer, gettimeofday, struct timeval +#endif #ifdef HAVE_SYS_TIMEB_H # include // for ftime() and struct timeb #endif #ifdef HAVE_UNISTD_H # include // for gettimeofday() #endif -#ifdef HAVE_SYS_TIME_H -# include // for get/setitimer, gettimeofday, struct timeval -#endif + +#include // for NAN #include #include -#include +#include #include "sg_time.hxx" #include "timezone.h" @@ -59,166 +62,82 @@ #define DEGHR(x) ((x)/15.) -#define RADHR(x) DEGHR(x*RAD_TO_DEG) - +#define RADHR(x) DEGHR(x*SGD_RADIANS_TO_DEGREES) -SGTime::SGTime( const string& root ) -{ - if (cur_time_params) { - FG_LOG( FG_GENERAL, FG_ALERT, - "Error: only one instance of SGTime allowed" ); - exit(-1); - } - cur_time_params = this; +static const double MJD0 = 2415020.0; +static const double J2000 = 2451545.0 - MJD0; +static const double SIDRATE = 0.9972695677; - FGPath zone( root ); - zone.append( "Timezone" ); - zone.append( "zone.tab" ); - FG_LOG( FG_EVENT, FG_DEBUG, "Reading timezone info from: " << zone.str() ); - tzContainer = new TimezoneContainer( zone.c_str() ); - - zonename = NULL; -} +void SGTime::init( double lon, double lat, + const string& root, time_t init_time ) +{ + SG_LOG( SG_EVENT, SG_INFO, "Initializing Time" ); + gst_diff = -9999.0; -SGTime::~SGTime() -{ - delete tzContainer; + if ( init_time ) { + cur_time = init_time; + } else { + cur_time = time(NULL); + } - if ( zonename != NULL ) { - delete zonename; + cout << "Current greenwich mean time = " << asctime(gmtime(&cur_time)) + << endl; + cout << "Current local time = " + << asctime(localtime(&cur_time)) << endl; + + if ( root != (string)"" ) { + SGPath zone( root ); + zone.append( "zone.tab" ); + SG_LOG( SG_EVENT, SG_INFO, "Reading timezone info from: " + << zone.str() ); + tzContainer = new TimezoneContainer( zone.c_str() ); + + GeoCoord location( SGD_RADIANS_TO_DEGREES * lat, SGD_RADIANS_TO_DEGREES * lon ); + GeoCoord* nearestTz = tzContainer->getNearest(location); + + SGPath name( root ); + name.append( nearestTz->getDescription() ); + zonename = strdup( name.c_str() ); + SG_LOG( SG_EVENT, SG_INFO, "Using zonename = " << zonename ); + } else { + SG_LOG( SG_EVENT, SG_INFO, "*** NO TIME ZONE NAME ***" ); + tzContainer = NULL; + zonename = NULL; } } -void SGTime::updateLocal( double lon, double lat, const string& root ) +SGTime::SGTime( double lon, double lat, const string& root, time_t init_time ) { - 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())) ); - local_offset = aircraftLocalTime - currGMT; - // cout << "Using " << local_offset << " as local time offset Timezone is " - // << zonename << endl; + init( lon, lat, root, init_time ); } -// Initialize the time dependent variables (maybe I'll put this in the -// constructor later) -void SGTime::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; - - // 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() ); - - // cout << "Using " << zone.str() << " for timezone information" << endl; - zonename = strdup( zone.c_str() ); - // cout << "zonename = " << zonename << endl; - //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) ); - // cout << "currGMT = " << currGMT << endl; - - // systemLocalTime = get_gmt( localtime(&cur_time) ); - // cout << "systemLocalTime = " << systemLocalTime << endl; - - // 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))); +SGTime::SGTime( const string& root ) { + init( 0.0, 0.0, root, 0 ); } -// 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 SGTime::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; - } - - 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; +SGTime::SGTime() { + init( 0.0, 0.0, "", 0 ); } -// given an mjd, calculate greenwich mean sidereal time, gst -void SGTime::utc_gst () +SGTime::~SGTime() { - 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; + if ( tzContainer != NULL ) { + TimezoneContainer *tmp = tzContainer; + tzContainer = NULL; + delete tmp; + } - FG_LOG( FG_EVENT, FG_DEBUG, " gst => " << gst ); + if ( zonename != NULL ) { + char *tmp = zonename; + zonename = NULL; + free(tmp); + } } @@ -226,48 +145,41 @@ void SGTime::utc_gst () // Local Sidereal Time, in decimal hours. // // Provided courtesy of ecdowney@noao.edu (Elwood Downey) - -double SGTime::sidereal_precise (double lng) +static double sidereal_precise( double mjd, 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; + lng *= SGD_DEGREES_TO_RADIANS; // compute LST and print - utc_gst(); - lstTmp = gst - RADHR (lng); - lstTmp -= 24.0*floor(lstTmp/24.0); + double gst = sgTimeCalcGST( mjd ); + double lst = gst - RADHR( lng ); + lst -= 24.0 * floor( lst / 24.0 ); // printf ("%7.4f\n", lstTmp); - // that's all - return (lstTmp); + return lst; } // return a courser but cheaper estimate of sidereal time -double SGTime::sidereal_course(double lng) +static double sidereal_course( time_t cur_time, const struct tm *gmt, 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); + start_gmt = sgTimeGetGMT(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 ); + SG_LOG( SG_EVENT, SG_DEBUG, " COURSE: GMT = " + << sgTimeFormatTime(gmt, tbuf) ); + SG_LOG( SG_EVENT, SG_DEBUG, " March 21 noon (GMT) = " << start_gmt ); diff = (now - start_gmt) / (3600.0 * 24.0); - FG_LOG( FG_EVENT, FG_DEBUG, + SG_LOG( SG_EVENT, SG_DEBUG, " Time since 3/21/" << gmt->tm_year << " GMT = " << diff ); part = fmod(diff, 1.0); @@ -280,40 +192,49 @@ double SGTime::sidereal_course(double lng) lstTmp += 24.0; } - FG_LOG( FG_EVENT, FG_DEBUG, + SG_LOG( SG_EVENT, SG_DEBUG, " days = " << days << " hours = " << hours << " lon = " << lng << " lst = " << lstTmp ); - return(lstTmp); + return lstTmp; } -// Update time variables such as gmt, julian date, and sidereal time -void SGTime::update( double lon, double lat, double alt_m, long int warp ) { +// Update the time related variables +void SGTime::update( double lon, double lat, time_t ct, long int warp ) { double gst_precise, gst_course; - FG_LOG( FG_EVENT, FG_DEBUG, "Updating time" ); +#if defined(_MSC_VER) || defined(__MINGW32__) + tm * gmt = &m_gmt; +#endif + + SG_LOG( SG_EVENT, SG_DEBUG, "Updating time" ); // get current Unix calendar time (in seconds) // warp += warp_delta; - cur_time = time(NULL) + warp; - FG_LOG( FG_EVENT, FG_DEBUG, + if ( ct ) { + cur_time = ct + warp; + } else { + cur_time = time(NULL) + warp; + } + SG_LOG( SG_EVENT, SG_DEBUG, " Current Unix calendar time = " << cur_time << " warp = " << warp ); // get GMT break down for current time +#if defined(_MSC_VER) || defined(__MINGW32__) + memcpy( gmt, gmtime(&cur_time), sizeof(tm) ); +#else gmt = gmtime(&cur_time); - FG_LOG( FG_EVENT, FG_DEBUG, +#endif + SG_LOG( SG_EVENT, SG_DEBUG, " Current GMT = " << gmt->tm_mon+1 << "/" - << gmt->tm_mday << "/" << gmt->tm_year << " " + << gmt->tm_mday << "/" << (1900 + 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)); + // calculate modified Julian date starting with current + mjd = sgTimeCurrentMJD( ct, warp ); // add in partial day mjd += (gmt->tm_hour / 24.0) + (gmt->tm_min / (24.0 * 60.0)) + @@ -321,36 +242,220 @@ void SGTime::update( double lon, double lat, double alt_m, long int warp ) { // 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 ); + SG_LOG( SG_EVENT, SG_DEBUG, " Current Julian Date = " << jd ); - // printf(" Current Longitude = %.3f\n", FG_Longitude * RAD_TO_DEG); + // printf(" Current Longitude = %.3f\n", FG_Longitude * SGD_RADIANS_TO_DEGREES); // 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); + SG_LOG( SG_EVENT, SG_INFO, " First time, doing precise gst" ); + gst_precise = gst = sidereal_precise( mjd, 0.00 ); + gst_course = sidereal_course( cur_time, gmt, 0.00 ); gst_diff = gst_precise - gst_course; - lst = sidereal_course(-(lon * RAD_TO_DEG)) + gst_diff; + lst = sidereal_course( cur_time, gmt, -(lon * SGD_RADIANS_TO_DEGREES) ) + 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; + gst = sidereal_course( cur_time, gmt, 0.00 ) + gst_diff; + lst = sidereal_course( cur_time, gmt, -(lon * SGD_RADIANS_TO_DEGREES) ) + gst_diff; } - FG_LOG( FG_EVENT, FG_DEBUG, + SG_LOG( SG_EVENT, SG_DEBUG, " Current lon=0.00 Sidereal Time = " << gst ); - FG_LOG( FG_EVENT, FG_DEBUG, + SG_LOG( SG_EVENT, SG_DEBUG, " Current LOCAL Sidereal Time = " << lst << " (" - << sidereal_precise(-(lon * RAD_TO_DEG)) + << sidereal_precise( mjd, -(lon * SGD_RADIANS_TO_DEGREES) ) << ") (diff = " << gst_diff << ")" ); } +// Given lon/lat, update timezone information and local_offset +void SGTime::updateLocal( double lon, double lat, const string& root ) { + // sanity checking + if ( lon < -SGD_PI || lon > SGD_PI ) { + // not within -180 ... 180 + lon = 0.0; + } + if ( lat < -SGD_PI * 0.5 || lat > SGD_PI * 0.5 ) { + // not within -90 ... 90 + lat = 0.0; + } + if ( lon != lon ) { + // only true if lon == nan + SG_LOG( SG_EVENT, SG_ALERT, " Detected lon == nan, resetting to 0.0" ); + lon = 0.0; + } + if ( lat != lat ) { + // only true if lat == nan + SG_LOG( SG_EVENT, SG_ALERT, " Detected lat == nan, resetting to 0.0" ); + lat = 0.0; + } + time_t currGMT; + time_t aircraftLocalTime; + GeoCoord location( SGD_RADIANS_TO_DEGREES * lat, SGD_RADIANS_TO_DEGREES * lon ); + GeoCoord* nearestTz = tzContainer->getNearest(location); + SGPath zone( root ); + zone.append ( nearestTz->getDescription() ); + if ( zonename ) { + char *ptr = zonename; + zonename = NULL; + free(ptr); + } + zonename = strdup( zone.c_str() ); + + //Avoid troubles when zone.tab hasn't got the right line endings + if (zonename[strlen(zonename)-1] == '\r') + { + zonename[strlen(zonename)-1]=0; + zone.set( zonename ); + } + + currGMT = sgTimeGetGMT( gmtime(&cur_time) ); + aircraftLocalTime = sgTimeGetGMT( (fgLocaltime(&cur_time, zone.c_str())) ); + local_offset = aircraftLocalTime - currGMT; + // cout << "Using " << local_offset << " as local time offset Timezone is " + // << zonename << endl; +} + + +// 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. +double sgTimeCalcMJD(int mn, double dy, int yr) { + double mjd; + + // internal book keeping data + static double last_mjd, last_dy; + 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; + } + + 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; +} + + +// return the current modified Julian date (number of days elapsed +// since 1900 jan 0.5), mjd. +double sgTimeCurrentMJD( time_t ct, long int warp ) { + +#if defined(_MSC_VER) || defined(__MINGW32__) + struct tm m_gmt; // copy of system gmtime(&time_t) structure + struct tm *gmt = &m_gmt; +#else + struct tm *gmt; +#endif + + // get current Unix calendar time (in seconds) + // warp += warp_delta; + time_t cur_time; + if ( ct ) { + cur_time = ct + warp; + } else { + cur_time = time(NULL) + warp; + } + SG_LOG( SG_EVENT, SG_DEBUG, + " Current Unix calendar time = " << cur_time + << " warp = " << warp ); + + // get GMT break down for current time +#if defined(_MSC_VER) || defined(__MINGW32__) + memcpy( gmt, gmtime(&cur_time), sizeof(tm) ); +#else + gmt = gmtime(&cur_time); +#endif + SG_LOG( SG_EVENT, SG_DEBUG, + " Current GMT = " << gmt->tm_mon+1 << "/" + << gmt->tm_mday << "/" << (1900 + 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)); + double mjd = sgTimeCalcMJD( (int)(gmt->tm_mon+1), (double)gmt->tm_mday, + (int)(gmt->tm_year + 1900) ); + + return mjd; +} + + +// given an mjd, calculate greenwich mean sidereal time, gst +double sgTimeCalcGST( double mjd ) { + double 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; + + SG_LOG( SG_EVENT, SG_DEBUG, " gst => " << gst ); + + return gst; +} + + +#if defined( HAVE_TIMEGM ) + // ignore this function +#elif defined( MK_TIME_IS_GMT ) + // ignore this function +#else // ! defined ( MK_TIME_IS_GMT ) + + // Fix up timezone if using ftime() + static 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 + } +#endif + + /****************************************************************** * The following are some functions that were included as SGTime * members, although they currently don't make use of any of the @@ -382,7 +487,7 @@ void SGTime::update( double lon, double lat, double alt_m, long int warp ) { // If you are having problems with incorrectly positioned astronomical // bodies, this is a really good place to start looking. -time_t SGTime::get_gmt(int year, int month, int day, int hour, int min, int sec) +time_t sgTimeGetGMT(int year, int month, int day, int hour, int min, int sec) { struct tm mt; @@ -402,77 +507,86 @@ time_t SGTime::get_gmt(int year, int month, int day, int hour, int min, int sec) # define MK_TIME_IS_GMT 1 #endif -#if defined( HAVE_TIMEGM ) +#if defined( HAVE_TIMEGM ) return ( timegm(&mt) ); #elif defined( MK_TIME_IS_GMT ) - return ( mktime(&mt) ); + time_t ret = mktime(&mt); + +#ifdef __CYGWIN__ + ret -= _timezone; +#endif + + // This is necessary as some mktime() calls may + // try to access the system timezone files + // if this open fails errno is set to 2 + // CYGWIN for one does this + // if ( errno ) { + // perror( "sgTimeGetGMT()" ); + // errno = 0; + // } + + // reset errno in any event. + errno = 0; + + return ret; #else // ! defined ( MK_TIME_IS_GMT ) // timezone seems to work as a proper offset for Linux & Solaris -# if defined( __linux__ ) || defined( __sun__ ) +# if defined( __linux__ ) || defined( __sun__ ) ||defined(__CYGWIN__) # define TIMEZONE_OFFSET_WORKS 1 # endif - long int start = mktime(&mt); +#if defined(__CYGWIN__) +#define TIMEZONE _timezone +#else +#define TIMEZONE timezone +#endif + + time_t start = mktime(&mt); - FG_LOG( FG_EVENT, FG_DEBUG, "start1 = " << start ); + SG_LOG( SG_EVENT, SG_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 << ")" ); + // fgPrintf( SG_EVENT, SG_DEBUG, "start2 = %s", ctime(&start)); + SG_LOG( SG_EVENT, SG_DEBUG, "(tm_isdst = " << mt.tm_isdst << ")" ); - timezone = fix_up_timezone( timezone ); + TIMEZONE = fix_up_timezone( TIMEZONE ); # if defined( TIMEZONE_OFFSET_WORKS ) - FG_LOG( FG_EVENT, FG_DEBUG, - "start = " << start << ", timezone = " << timezone ); - return( start - timezone ); + SG_LOG( SG_EVENT, SG_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, + SG_LOG( SG_EVENT, FG_WARN, "OOOPS, problem in sg_time.cxx, no daylight savings info." ); } - long int offset = -(timezone / 3600 - daylight); + 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 ); + SG_LOG( SG_EVENT, SG_DEBUG, " Raw time zone offset = " << TIMEZONE ); + SG_LOG( SG_EVENT, SG_DEBUG, " Daylight Savings = " << daylight ); + SG_LOG( SG_EVENT, SG_DEBUG, " Local hours from GMT = " << offset ); - long int start_gmt = start - timezone + (daylight * 3600); + long int start_gmt = start - TIMEZONE + (daylight * 3600); - FG_LOG( FG_EVENT, FG_DEBUG, " March 21 noon (CST) = " << start ); + SG_LOG( SG_EVENT, SG_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 SGTime::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* SGTime::format_time( const struct tm* p, char* buf ) +// format time +char* sgTimeFormatTime( 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; } - - -SGTime* SGTime::cur_time_params = 0;