feat(thermal): add local shell kernel and time grid

src/fesa/analysis/thermal_time_grid.cpp

@@ -0,0 +1,4 @@
+#include "fesa/analysis/thermal_time_grid.h"
+#include <cmath>
+#include <limits>
+namespace fesa { Result<ThermalTimeGrid> ThermalTimeGrid::Create(double p,double d,std::uint32_t max) { if(!std::isfinite(p)||!std::isfinite(d)||p<=0||d<=0||max==0) return Result<ThermalTimeGrid>::Failure(Status::Failure(FailureCategory::kModel,{{Severity::kError,"invalid-thermal-time-grid",{},"STEP","","Invalid thermal time grid."}})); if(d>=p) return Result<ThermalTimeGrid>::Success(ThermalTimeGrid{p,d,1,true}); const double q=p/d; const auto m=static_cast<std::uint64_t>(std::nearbyint(q)); const bool close=m>0 && std::abs(std::fma(-static_cast<double>(m),d,p)) <= .5*(std::nextafter(p,std::numeric_limits<double>::infinity())-p)+.5*static_cast<double>(m)*(std::nextafter(d,std::numeric_limits<double>::infinity())-d); const std::uint64_t n=close?m:static_cast<std::uint64_t>(std::ceil(q)); if(n>max||n>std::numeric_limits<std::uint32_t>::max()) return Result<ThermalTimeGrid>::Failure(Status::Failure(FailureCategory::kModel,{{Severity::kError,"thermal-increment-limit",{},"STEP","","Thermal increment count exceeds INC."}})); return Result<ThermalTimeGrid>::Success(ThermalTimeGrid{p,d,static_cast<std::uint32_t>(n),close}); } std::uint32_t ThermalTimeGrid::Count()const noexcept{return count_;} double ThermalTimeGrid::Time(std::uint32_t i)const noexcept{return i==count_?period_:static_cast<double>(i)*increment_;} double ThermalTimeGrid::Delta(std::uint32_t i)const noexcept{return (i==count_&&!close_)?std::fma(-static_cast<double>(count_-1),increment_,period_):increment_;} }