00001 #ifndef GSGL_MATH_TIME_H 00002 #define GSGL_MATH_TIME_H 00003 00004 // 00005 // $Id: time.hpp 2 2008-03-01 20:58:50Z kulibali $ 00006 // 00007 // Copyright (c) 2008, The Periapsis Project. All rights reserved. 00008 // 00009 // Redistribution and use in source and binary forms, with or without 00010 // modification, are permitted provided that the following conditions are 00011 // met: 00012 // 00013 // * Redistributions of source code must retain the above copyright notice, 00014 // this list of conditions and the following disclaimer. 00015 // 00016 // * Redistributions in binary form must reproduce the above copyright 00017 // notice, this list of conditions and the following disclaimer in the 00018 // documentation and/or other materials provided with the distribution. 00019 // 00020 // * Neither the name of the The Periapsis Project nor the names of its 00021 // contributors may be used to endorse or promote products derived from 00022 // this software without specific prior written permission. 00023 // 00024 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 00025 // IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 00026 // TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 00027 // PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER 00028 // OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 00029 // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 00030 // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 00031 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 00032 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 00033 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 00034 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00035 // 00036 00037 #include "math/math.hpp" 00038 00039 #include <ctime> 00040 00041 namespace gsgl 00042 { 00043 00044 class string; 00045 00046 namespace math 00047 { 00048 00049 class MATH_API julian_day 00050 : public math_object 00051 { 00052 double jdn; 00053 public: 00054 julian_day(); 00055 explicit julian_day(const double & jdn); 00056 explicit julian_day(const time_t & t); 00057 00058 const double & get_jdn() const { return jdn; } 00059 double & get_jdn() { return jdn; } 00060 00061 time_t to_time_t() const; 00062 00063 string to_gregorian_string() const; 00064 void from_gregorian_string(const string &); 00065 00066 static const double J1970; 00067 static const double JDAY; 00068 static julian_day now(); 00069 }; // class julian_day 00070 00071 } // namespace math 00072 00073 } // namespace gsgl 00074 00075 #endif
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