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empty_precond.hpp
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1 
5 /* Copyright (c) 2005-2009,2012 Taneli Kalvas. All rights reserved.
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42 
43 #ifndef EMPTY_PRECOND_HPP
44 #define EMPTY_PRECOND_HPP 1
45 
46 
47 #include "precond.hpp"
48 
49 
52 class Empty_Precond : public Precond {
53 
54  Empty_Precond( const Empty_Precond &pc ) {}
55  const Empty_Precond &operator=( const Empty_Precond &pc ) { return( *this ); }
56 
57 public:
58 
62 
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69  Empty_Precond *copy( void ) const { return( new Empty_Precond( *this ) ); }
70 
74  void prepare( const CRowMatrix &A ) {}
75 
78  void construct( const CRowMatrix &A ) {}
79 
85  void clear( void ) {}
86 
91  bool is_prepared( void ) const { return( true ); }
92 
95  std::string typestring( void ) const {
96  return( "Empty" );
97  }
98 
101  inline void solve( Vector &x, const Vector &b ) const {
102  x = b;
103  }
104 };
105 
106 
107 #endif
108 
109 
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127 
Compressed row sparse matrix class.
Definition: crowmatrix.hpp:76
Empty preconditioner class.
Definition: empty_precond.hpp:52
void prepare(const CRowMatrix &A)
Prepare preconditioner for matrices with non-zero pattern equal to A.
Definition: empty_precond.hpp:74
~Empty_Precond()
Destructor.
Definition: empty_precond.hpp:65
bool is_prepared(void) const
Return false if prepare is needed.
Definition: empty_precond.hpp:91
void clear(void)
Clear preconditioner.
Definition: empty_precond.hpp:85
void solve(Vector &x, const Vector &b) const
Return x = b.
Definition: empty_precond.hpp:101
Empty_Precond * copy(void) const
Get a new copy of preconditioner.
Definition: empty_precond.hpp:69
Empty_Precond()
Constructor.
Definition: empty_precond.hpp:61
std::string typestring(void) const
Return string indicating type of preconditioner.
Definition: empty_precond.hpp:95
void construct(const CRowMatrix &A)
Construct preconditioner for matrix A.
Definition: empty_precond.hpp:78
Abstract base preconditioner class.
Definition: precond.hpp:59
Dense math vector class.
Definition: mvector.hpp:71
Base class for preconditioners.


Reference manual for Ion Beam Simulator 1.0.6dev
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