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ab.hpp

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00001 //************************************************************************************//
00002 // Module       : ab.hpp
00003 // Date         : 11/8/04 (DLR)
00004 // Copyright    : 2004-2006 Copyright University Corporation for Atmospheric
00005 //                Research
00006 // Description  : Encapsulates the methods and data associated with
00007 //                specifying and computing coefficients in an
00008 //                Adams-Bashforth scheme with variable timestep.
00009 // Derived From : none.
00010 // Modifications:
00011 //************************************************************************************//
00012 #if !defined(AB_HPP)
00013 #define AB_HPP
00014 
00015 #include "gtbuffer.hpp"
00016 
00017 
00018 class AB 
00019 {
00020 public:
00021                   AB(GSHORT iorder=2);
00022                  ~AB();
00023                   AB(const AB &a);
00024 
00025 void              SetOrder(GSHORT iorder); 
00026 void              SetTimestepHistory(GDBuffer *dthist); 
00027 GDBuffer          *GetCoeffs();
00028 GDBuffer          *GetTimestepHistory();
00029 void              ComputeCoeffs();
00030 friend ostream&   operator<<(ostream&, AB &);                                  // Output stream operator
00031 GDOUBLE           &operator()(const GSHORT  i);
00032 GDOUBLE           &operator[](const GSHORT  i);
00033 
00034 
00035 
00036 private:
00037 // Private methods:
00038 
00039 // Private data:
00040 GSHORT            iorder_;              // specified AB order
00041 GSHORT            maxorder_;            // max AB order allowed by class
00042 GDBuffer          coeffs_;              // buffer of AB coeffs
00043 GDBuffer          *dthist_;             // timestep history pointer, managed outside of class
00044 };
00045 #endif
00046 

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