hashfunction01 Class Reference

#include <hashfunction01.h>

Collaboration diagram for hashfunction01:

List of all members.

Public Member Functions
	hashfunction01 ()
	Construct in bad state.
void	construct (uint nloops_)
	Construct class.
	hashfunction01 (uintc nloops_)
	Control the number of loops, must be greater than 0.
uintc	operator() (uintc key) const
	Hash an integer to another integer.
Public Attributes
uint	nloops
	The number of loops in the hash function.

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Detailed Description

Definition at line 14 of file hashfunction01.h.

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Constructor & Destructor Documentation

hashfunction01::hashfunction01

(

)

Construct in bad state.

Definition at line 4 of file hashfunction01.cpp.

  : nloops(0) {}

hashfunction01::hashfunction01

(

uintc

nloops_

)

Control the number of loops, must be greater than 0.

Definition at line 7 of file hashfunction01.cpp.

  : nloops(loops_) {}

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Member Function Documentation

void hashfunction01::construct

(

uint

nloops_

)

[inline]

Construct class.

Definition at line 25 of file hashfunction01.h.

References nloops.

Referenced by stringhash::construct().

    { nloops=nloops_; }

uintc hashfunction01::operator()

(

uintc

key

)

const

Hash an integer to another integer.

Definition at line 11 of file hashfunction01.cpp.

References nloops.

{
  uint h = key;
  uint i;

  assert(nloops!=0);

  for (i=0; i<nloops; ++i)
  {
    h += ~(h << 15);
    h ^=  (h >> 10);
    h +=  (h << 3);
    h ^=  (h >> 6);
    h += ~(h << 11);
    h ^=  (h >> 10);
  }

  return h;
}

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Member Data Documentation

uint hashfunction01::nloops

The number of loops in the hash function.

Definition at line 19 of file hashfunction01.h.

Referenced by construct(), and operator()().

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

• bucket/hashfunction01.h
• bucket/hashfunction01.cpp