DL_FixedBasePrecomputation< T > Class Template Reference

DL_FixedBasePrecomputation interface. More...

#include <eprecomp.h>

Inheritance diagram for DL_FixedBasePrecomputation< T >:

Public Types
typedef T	Element

Public Member Functions
virtual bool	IsInitialized () const =0
	Determines whether this object is initialized.
virtual void	SetBase (const DL_GroupPrecomputation< Element > &group, const Element &base)=0
	Set the base element.
virtual const Element &	GetBase (const DL_GroupPrecomputation< Element > &group) const =0
	Get the base element.
virtual void	Precompute (const DL_GroupPrecomputation< Element > &group, unsigned int maxExpBits, unsigned int storage)=0
	Perform precomputation.
virtual void	Load (const DL_GroupPrecomputation< Element > &group, BufferedTransformation &storedPrecomputation)=0
	Retrieve previously saved precomputation.
virtual void	Save (const DL_GroupPrecomputation< Element > &group, BufferedTransformation &storedPrecomputation) const =0
	Save precomputation for later use.
virtual Element	Exponentiate (const DL_GroupPrecomputation< Element > &group, const Integer &exponent) const =0
	Exponentiates an element.
virtual Element	CascadeExponentiate (const DL_GroupPrecomputation< Element > &pc1, const Integer &exponent1, const DL_FixedBasePrecomputation< Element > &pc2, const Integer &exponent2) const =0
	Exponentiates an element.

Detailed Description

template<class T>
class DL_FixedBasePrecomputation< T >

DL_FixedBasePrecomputation interface.

Template Parameters

T	Field element

Definition at line 60 of file eprecomp.h.

Member Typedef Documentation

Element

template<class T >

typedef T DL_FixedBasePrecomputation< T >::Element

Definition at line 63 of file eprecomp.h.

Constructor & Destructor Documentation

~DL_FixedBasePrecomputation()

template<class T >

virtual DL_FixedBasePrecomputation< T >::~DL_FixedBasePrecomputation ( )

inlinevirtual

Definition at line 65 of file eprecomp.h.

Member Function Documentation

IsInitialized()

template<class T >

virtual bool DL_FixedBasePrecomputation< T >::IsInitialized ( ) const

pure virtual

Determines whether this object is initialized.

Returns

true if this object is initialized, false otherwise

Implemented in DL_FixedBasePrecomputationImpl< T >, DL_FixedBasePrecomputationImpl< typename GROUP_PRECOMP::Element >, and DL_BasePrecomputation_LUC.

SetBase()

template<class T >

virtual void DL_FixedBasePrecomputation< T >::SetBase ( const DL_GroupPrecomputation< Element > &  group, const Element &  base  )

pure virtual

Set the base element.

Parameters

group	the group
base	element in the group

Implemented in DL_FixedBasePrecomputationImpl< T >, and DL_BasePrecomputation_LUC.

GetBase()

template<class T >

virtual const Element & DL_FixedBasePrecomputation< T >::GetBase ( const DL_GroupPrecomputation< Element > &  group ) const

pure virtual

Get the base element.

Parameters

group

the group

Returns

base element in the group

Implemented in DL_FixedBasePrecomputationImpl< T >, and DL_BasePrecomputation_LUC.

Precompute()

template<class T >

virtual void DL_FixedBasePrecomputation< T >::Precompute ( const DL_GroupPrecomputation< Element > &  group, unsigned int  maxExpBits, unsigned int  storage  )

pure virtual

Perform precomputation.

Parameters

group	the group
maxExpBits	used to calculate the exponent base
storage	the suggested number of objects for the precompute table

The exact semantics of Precompute() varies, but it typically means calculate a table of n objects that can be used later to speed up computation.

If a derived class does not override Precompute(), then the base class throws NotImplemented.

See also

SupportsPrecomputation(), LoadPrecomputation(), SavePrecomputation()

Implemented in DL_FixedBasePrecomputationImpl< T >, and DL_BasePrecomputation_LUC.

Load()

template<class T >

virtual void DL_FixedBasePrecomputation< T >::Load ( const DL_GroupPrecomputation< Element > &  group, BufferedTransformation &  storedPrecomputation  )

pure virtual

Retrieve previously saved precomputation.

Parameters

group	the group
storedPrecomputation	BufferedTransformation with the saved precomputation

Exceptions

NotImplemented

See also

SupportsPrecomputation(), Precompute()

Implemented in DL_FixedBasePrecomputationImpl< T >, and DL_BasePrecomputation_LUC.

Save()

template<class T >

virtual void DL_FixedBasePrecomputation< T >::Save ( const DL_GroupPrecomputation< Element > &  group, BufferedTransformation &  storedPrecomputation  ) const

pure virtual

Save precomputation for later use.

Parameters

group	the group
storedPrecomputation	BufferedTransformation to write the precomputation

Exceptions

NotImplemented

See also

SupportsPrecomputation(), Precompute()

Implemented in DL_FixedBasePrecomputationImpl< T >, and DL_BasePrecomputation_LUC.

Exponentiate()

template<class T >

virtual Element DL_FixedBasePrecomputation< T >::Exponentiate ( const DL_GroupPrecomputation< Element > &  group, const Integer &  exponent  ) const

pure virtual

Exponentiates an element.

Parameters

group	the group
exponent	the exponent

Returns

the result of the exponentiation

Implemented in DL_FixedBasePrecomputationImpl< T >, and DL_BasePrecomputation_LUC.

CascadeExponentiate()

template<class T >

virtual Element DL_FixedBasePrecomputation< T >::CascadeExponentiate ( const DL_GroupPrecomputation< Element > &  pc1, const Integer &  exponent1, const DL_FixedBasePrecomputation< Element > &  pc2, const Integer &  exponent2  ) const

pure virtual

Exponentiates an element.

Parameters

pc1	the first the group precomputation
exponent1	the first exponent
pc2	the second the group precomputation
exponent2	the first exponent2

Returns

the public element raised to the exponent

CascadeExponentiateBaseAndPublicElement raises the public element to the base element and precomputation.

Implemented in DL_BasePrecomputation_LUC, and DL_FixedBasePrecomputationImpl< T >.

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The documentation for this class was generated from the following file:

• eprecomp.h