mfem::HashFunction Class Reference

Hash function for data sequences. More...

#include <hash.hpp>

Public Member Functions
	HashFunction ()
	Default constructor: initialize the hash function.
	~HashFunction ()
	Destructor.
HashFunction &	AppendBytes (const void *seq, size_t num_bytes)
	Add a sequence of bytes for hashing.
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.
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.
template<typename int_type_container >
HashFunction &	AppendInts (const int_type_container &ints)
	Add a sequence of integers for hashing, given as a container.
HashFunction &	AppendDoubles (const real_t *doubles, size_t num_doubles)
	Add a sequence of doubles for hashing, given as a c-array.
template<size_t num_doubles>
HashFunction &	AppendDoubles (const real_t(&doubles)[num_doubles])
	Add a sequence of doubles for hashing, given as a fixed-size c-array.
template<typename double_container >
HashFunction &	AppendDoubles (const double_container &doubles)
	Add a sequence of doubles for hashing, given as a container.
std::string	GetHash () const
	Return the hash string for the current sequence and reset (clear) the sequence.

Protected Member Functions
void	HashBuffer (const void *buffer, size_t num_bytes)
	Add a sequence of bytes for hashing.
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.
template<typename double_const_iter >
HashFunction &	EncodeAndHashDoubles (double_const_iter begin, double_const_iter end)
	Double encoding method: encode in little-endian byte-order.

Protected Attributes
void *	hash_data

Detailed Description

Hash function for data sequences.

Depends on GnuTLS for SHA-256 hashing.

Definition at line 458 of file hash.hpp.

Constructor & Destructor Documentation

HashFunction()

mfem::HashFunction::HashFunction

(

)

Default constructor: initialize the hash function.

Definition at line 29 of file hash.cpp.

~HashFunction()

mfem::HashFunction::~HashFunction

(

)

Destructor.

Definition at line 38 of file hash.cpp.

Member Function Documentation

AppendBytes()

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

inline

Add a sequence of bytes for hashing.

Definition at line 484 of file hash.hpp.

AppendDoubles() [1/3]

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 525 of file hash.hpp.

AppendDoubles() [2/3]

HashFunction & mfem::HashFunction::AppendDoubles ( const real_t * 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 511 of file hash.hpp.

AppendDoubles() [3/3]

template<size_t num_doubles>

HashFunction & mfem::HashFunction::AppendDoubles ( const real_t(&) 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 518 of file hash.hpp.

AppendInts() [1/3]

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 491 of file hash.hpp.

AppendInts() [2/3]

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 498 of file hash.hpp.

AppendInts() [3/3]

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 505 of file hash.hpp.

EncodeAndHashDoubles()

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 987 of file hash.hpp.

EncodeAndHashInts()

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 937 of file hash.hpp.

GetHash()

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.

HashBuffer()

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

hash_data

void* mfem::HashFunction::hash_data

protected

Definition at line 461 of file hash.hpp.

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

• general/hash.hpp
• general/hash.cpp