Hash function implementation base class. More...

#include "hash-function.h"

Inheritance diagram for ns3::Hash::Implementation:

Collaboration diagram for ns3::Hash::Implementation:

Public Member Functions
	Implementation ()
	Constructor.

virtual	~Implementation ()
	Destructor.

virtual void	clear ()=0
	Restore initial state.

virtual uint32_t	GetHash32 (const char *buffer, const std::size_t size)=0
	Compute 32-bit hash of a byte buffer.

virtual uint64_t	GetHash64 (const char *buffer, const std::size_t size)
	Compute 64-bit hash of a byte buffer.

Public Member Functions inherited from ns3::SimpleRefCount< Implementation >
	SimpleRefCount ()
	Default constructor.

	SimpleRefCount (const SimpleRefCount &o)
	Copy constructor.

uint32_t	GetReferenceCount () const
	Get the reference count of the object.

SimpleRefCount &	operator= (const SimpleRefCount &o)
	Assignment operator.

void	Ref () const
	Increment the reference count.

void	Unref () const
	Decrement the reference count.

Detailed Description

Hash function implementation base class.

Definition at line 38 of file hash-function.h.

Constructor & Destructor Documentation

◆ Implementation()

ns3::Hash::Implementation::Implementation ( )

inline

Constructor.

Definition at line 81 of file hash-function.h.

◆ ~Implementation()

virtual ns3::Hash::Implementation::~Implementation ( )

inlinevirtual

Destructor.

Definition at line 88 of file hash-function.h.

Member Function Documentation

◆ clear()

virtual void ns3::Hash::Implementation::clear ( )

pure virtual

Restore initial state.

Implemented in ns3::Hash::Function::Fnv1a, ns3::Hash::Function::Hash32, ns3::Hash::Function::Hash64, and ns3::Hash::Function::Murmur3.

◆ GetHash32()

virtual uint32_t ns3::Hash::Implementation::GetHash32	(	const char *	buffer,
		const std::size_t	size )

pure virtual

Compute 32-bit hash of a byte buffer.

Call clear() between calls to GetHash32() to reset the internal state and hash each buffer separately.

If you don't call clear() between calls to GetHash32, you can hash successive buffers. The final return value will be the cumulative hash across all calls.

Parameters

[in]	buffer	Pointer to the beginning of the buffer.
[in]	size	Length of the buffer, in bytes.

Returns: 32-bit hash of the buffer.

Implemented in ns3::Hash::Function::Hash32, ns3::Hash::Function::Hash64, and ns3::Hash::Function::Murmur3.

Referenced by GetHash64().

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◆ GetHash64()

uint64_t ns3::Hash::Implementation::GetHash64	(	const char *	buffer,
		const std::size_t	size )

virtual

Compute 64-bit hash of a byte buffer.

Default implementation returns 32-bit hash, with a warning.

Call clear() between calls to GetHash64() to reset the internal state and hash each buffer separately.

If you don't call clear() between calls to GetHash64, you can hash successive buffers. The final return value will be the cumulative hash across all calls.

Parameters

[in]	buffer	Pointer to the beginning of the buffer.
[in]	size	Length of the buffer, in bytes.

Returns: 64-bit hash of the buffer.

Reimplemented in ns3::Hash::Function::Hash64, and ns3::Hash::Function::Murmur3.

Definition at line 28 of file hash-function.cc.

References GetHash32(), and NS_LOG_WARN.

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

src/core/model/hash-function.h
src/core/model/hash-function.cc

Public Member Functions