Hash function for data sequences. More...

#include <hash.hpp>

Public Member Functions
	HashFunction ()
	Default constructor: initialize the hash function. More...

	~HashFunction ()
	Destructor. More...

HashFunction &	AppendBytes (const void *seq, size_t num_bytes)
	Add a sequence of bytes for hashing. More...

template<typename int_type >
HashFunction &	AppendInts (const int_type *ints, size_t num_ints)
	Add a sequence of integers for hashing, given as a c-array. More...

template<typename int_type , size_t num_ints>
HashFunction &	AppendInts (const int_type(&ints)[num_ints])
	Add a sequence of integers for hashing, given as a fixed-size c-array. More...

template<typename int_type_container >
HashFunction &	AppendInts (const int_type_container &ints)
	Add a sequence of integers for hashing, given as a container. More...

HashFunction &	AppendDoubles (const double *doubles, size_t num_doubles)
	Add a sequence of doubles for hashing, given as a c-array. More...

template<size_t num_doubles>
HashFunction &	AppendDoubles (const double(&doubles)[num_doubles])
	Add a sequence of doubles for hashing, given as a fixed-size c-array. More...

template<typename double_container >
HashFunction &	AppendDoubles (const double_container &doubles)
	Add a sequence of doubles for hashing, given as a container. More...

std::string	GetHash () const
	Return the hash string for the current sequence and reset (clear) the sequence. More...

Protected Member Functions
void	HashBuffer (const void *buffer, size_t num_bytes)
	Add a sequence of bytes for hashing. More...

template<typename int_type_const_iter >
HashFunction &	EncodeAndHashInts (int_type_const_iter begin, int_type_const_iter end)
	Integer encoding method; result is independent of endianness and type. More...

template<typename double_const_iter >
HashFunction &	EncodeAndHashDoubles (double_const_iter begin, double_const_iter end)
	Double encoding method: encode in little-endian byte-order. More...

Protected Attributes
void *	hash_data

Detailed Description

Hash function for data sequences.

Depends on GnuTLS for SHA-256 hashing.

Definition at line 218 of file hash.hpp.

Constructor & Destructor Documentation

mfem::HashFunction::HashFunction ( )

Default constructor: initialize the hash function.

Definition at line 29 of file hash.cpp.

mfem::HashFunction::~HashFunction ( )

Destructor.

Definition at line 38 of file hash.cpp.

Member Function Documentation

HashFunction& mfem::HashFunction::AppendBytes	(	const void *	seq,
		size_t	num_bytes
	)

inline

Add a sequence of bytes for hashing.

Definition at line 244 of file hash.hpp.

HashFunction& mfem::HashFunction::AppendDoubles	(	const double *	doubles,
		size_t	num_doubles
	)

inline

Add a sequence of doubles for hashing, given as a c-array.

Before hashing the sequence is encoded so that the result is independent of endianness.

Definition at line 271 of file hash.hpp.

template<size_t num_doubles>

HashFunction& mfem::HashFunction::AppendDoubles ( const double(&) doubles[num_doubles] )

inline

Add a sequence of doubles for hashing, given as a fixed-size c-array.

Before hashing the sequence is encoded so that the result is independent of endianness.

Definition at line 278 of file hash.hpp.

template<typename double_container >

HashFunction& mfem::HashFunction::AppendDoubles ( const double_container & doubles )

inline

Add a sequence of doubles for hashing, given as a container.

Before hashing the sequence is encoded so that the result is independent of endianness.

Definition at line 285 of file hash.hpp.

template<typename int_type >

HashFunction& mfem::HashFunction::AppendInts	(	const int_type *	ints,
		size_t	num_ints
	)

inline

Add a sequence of integers for hashing, given as a c-array.

Before hashing the sequence is encoded so that the result is independent of endianness and type: int, long, unsigned, etc.

Definition at line 251 of file hash.hpp.

template<typename int_type , size_t num_ints>

HashFunction& mfem::HashFunction::AppendInts ( const int_type(&) ints[num_ints] )

inline

Add a sequence of integers for hashing, given as a fixed-size c-array.

Before hashing the sequence is encoded so that the result is independent of endianness and type: int, long, unsigned, etc.

Definition at line 258 of file hash.hpp.

template<typename int_type_container >

HashFunction& mfem::HashFunction::AppendInts ( const int_type_container & ints )

inline

Add a sequence of integers for hashing, given as a container.

Before hashing the sequence is encoded so that the result is independent of endianness and type: int, long, unsigned, etc.

Definition at line 265 of file hash.hpp.

template<typename double_const_iter >

HashFunction & mfem::HashFunction::EncodeAndHashDoubles	(	double_const_iter	begin,
		double_const_iter	end
	)

protected

Double encoding method: encode in little-endian byte-order.

Definition at line 704 of file hash.hpp.

template<typename int_type_const_iter >

HashFunction & mfem::HashFunction::EncodeAndHashInts	(	int_type_const_iter	begin,
		int_type_const_iter	end
	)

protected

Integer encoding method; result is independent of endianness and type.

Definition at line 654 of file hash.hpp.

std::string mfem::HashFunction::GetHash ( ) const

Return the hash string for the current sequence and reset (clear) the sequence.

Definition at line 60 of file hash.cpp.

void mfem::HashFunction::HashBuffer	(	const void *	buffer,
		size_t	num_bytes
	)

protected

Add a sequence of bytes for hashing.

Definition at line 45 of file hash.cpp.

Member Data Documentation

void* mfem::HashFunction::hash_data

protected

Definition at line 221 of file hash.hpp.

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

general/hash.hpp
general/hash.cpp

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation