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ns3::Hash::Implementation Class Referenceabstract

Hash function implementation base class. More...

#include "hash-function.h"

+ Inheritance diagram for ns3::Hash::Implementation:
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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.
 
SimpleRefCountoperator= (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 49 of file hash-function.h.

Constructor & Destructor Documentation

◆ Implementation()

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

Constructor.

Definition at line 92 of file hash-function.h.

◆ ~Implementation()

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

Destructor.

Definition at line 99 of file hash-function.h.

Member Function Documentation

◆ clear()

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

◆ 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]bufferPointer to the beginning of the buffer.
[in]sizeLength 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]bufferPointer to the beginning of the buffer.
[in]sizeLength 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 39 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: