115 lines
2.4 KiB
C++
115 lines
2.4 KiB
C++
/*
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* Copyright 2013 Daniel Warner <contact@danrw.com>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef UTIL_H_
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#define UTIL_H_
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#include "Globals.h"
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#include <sstream>
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namespace libsgp4
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{
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namespace Util
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{
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template
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<typename T>
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bool FromString(const std::string& str, T& val)
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{
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std::stringstream ss(str);
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return !(ss >> val).fail();
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}
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/*
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* always positive result
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* Mod(-3,4)= 1 fmod(-3,4)= -3
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*/
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inline double Mod(const double x, const double y)
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{
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if (y == 0.0)
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{
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return x;
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}
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return x - y * floor(x / y);
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}
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inline double WrapNegPosPI(const double a)
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{
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return Mod(a + kPI, kTWOPI) - kPI;
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}
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inline double WrapTwoPI(const double a)
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{
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return Mod(a, kTWOPI);
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}
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inline double WrapNegPos180(const double a)
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{
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return Mod(a + 180.0, 360.0) - 180.0;
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}
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inline double Wrap360(const double a)
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{
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return Mod(a, 360.0);
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}
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inline double DegreesToRadians(const double degrees)
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{
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return degrees * kPI / 180.0;
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}
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inline double RadiansToDegrees(const double radians)
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{
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return radians * 180.0 / kPI;
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}
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inline double AcTan(const double sinx, const double cosx)
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{
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if (cosx == 0.0)
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{
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if (sinx > 0.0)
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{
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return kPI / 2.0;
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}
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else
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{
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return 3.0 * kPI / 2.0;
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}
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}
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else
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{
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if (cosx > 0.0)
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{
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return atan(sinx / cosx);
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}
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else
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{
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return kPI + atan(sinx / cosx);
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}
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}
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}
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void TrimLeft(std::string& s);
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void TrimRight(std::string& s);
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void Trim(std::string& s);
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} // namespace Util
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} // namespace libsgp4
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#endif
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