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ilu1_precond.hpp
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1 
5 /* Copyright (c) 2012 Taneli Kalvas. All rights reserved.
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42 
43 #ifndef ILU1_PRECOND_HPP
44 #define ILU1_PRECOND_HPP 1
45 
46 
47 #include "matrix.hpp"
48 #include "crowmatrix.hpp"
49 #include "precond.hpp"
50 
51 
54 class ILU1_Precond : public Precond {
55 
56  CRowMatrix *_LU;
57 
58  ILU1_Precond( const ILU1_Precond &pc ) {}
59  const ILU1_Precond &operator=( const ILU1_Precond &pc ) { return( *this ); }
60 
61  static void add_element( int *ptr, int **col, int n, int &nz, int &asize, int c );
62 
63 public:
64 
67  ILU1_Precond();
68 
71  ~ILU1_Precond();
72 
77  ILU1_Precond *copy( void ) const { return( new ILU1_Precond( *this ) ); }
78 
85  void prepare( const CRowMatrix &A );
86 
91  void construct( const CRowMatrix &A );
92 
98  void clear( void );
99 
104  bool is_prepared( void ) const;
105 
108  const CRowMatrix *get_matrix( void ) const;
109 
112  void debug_print( std::ostream &os ) const;
113 
116  std::string typestring( void ) const;
117 
120  void solve( Vector &x, const Vector &b ) const;
121 };
122 
123 
124 #endif
Compressed row sparse matrix class.
Definition: crowmatrix.hpp:76
First level fill-in incomplete LU preconditioner class.
Definition: ilu1_precond.hpp:54
~ILU1_Precond()
Destructor.
Definition: ilu1_precond.cpp:80
ILU1_Precond * copy(void) const
Get a new copy of preconditioner.
Definition: ilu1_precond.hpp:77
void debug_print(std::ostream &os) const
Print debugging information to os.
Definition: ilu1_precond.cpp:230
void solve(Vector &x, const Vector &b) const
Solve M* x = b and return x.
Definition: ilu1_precond.cpp:239
void prepare(const CRowMatrix &A)
Prepare preconditioner for matrices with non-zero pattern equal to A.
Definition: ilu1_precond.cpp:86
ILU1_Precond()
Constructor for an ILU1 preconditioner.
Definition: ilu1_precond.cpp:74
void construct(const CRowMatrix &A)
Construct preconditioner for matrix A.
Definition: ilu1_precond.cpp:151
const CRowMatrix * get_matrix(void) const
Return LU matrix.
Definition: ilu1_precond.cpp:224
void clear(void)
Clear preconditioner.
Definition: ilu1_precond.cpp:210
bool is_prepared(void) const
Return false if prepare is needed.
Definition: ilu1_precond.cpp:218
std::string typestring(void) const
Return string indicating type of preconditioner.
Definition: ilu1_precond.cpp:68
Abstract base preconditioner class.
Definition: precond.hpp:59
Dense math vector class.
Definition: mvector.hpp:71
Compressed row sparse matrix algebra.
Basis for matrix implementations.
Base class for preconditioners.


Reference manual for Ion Beam Simulator 1.0.6dev
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