NewGamePhysics.Utilities.BitCount Class Reference

Counts the bits in integer values. More...

List of all members.

Public Member Functions

 BitCount ()
 Constructor which generates a bit count lookup array.
int FastBitcount (ushort testThis)
 Find the number of bits in the parameter ushort.
int FastBitcount (short testThis)
 Find the number of bits in the parameter short.
int FastBitcount (uint testThis)
 Find the number of bits in the parameter uint.
int FastBitcount (int testThis)
 Find the number of bits in the parameter int.
int FastBitcount (ulong testThis)
 Find the number of bits in the parameter long.
int FastBitcount (long testThis)
 Find the number of bits in the parameter int.
int FastBitcount (double testThis)
 Find the number of bits in the parameter double.

Detailed Description

Counts the bits in integer values.

Definition at line 13 of file BitCount.cs.

Constructor & Destructor Documentation

NewGamePhysics.Utilities.BitCount.BitCount (  ) 

Constructor which generates a bit count lookup array.

Definition at line 25 of file BitCount.cs.

00026         {
00027             // Initialize cache
00028             bitcountCache = new byte[65536];
00029             for (int i = 0; i < 65536; i++)
00030             {
00031                 bitcountCache[i] = SparseBitcount(i);
00032             }
00033         }

Member Function Documentation

int NewGamePhysics.Utilities.BitCount.FastBitcount ( double  testThis  ) 

Find the number of bits in the parameter double.

Parameters:
testThis The number to count the bits of.
Returns:
The number of bits in the parameter.

Definition at line 104 of file BitCount.cs.

00105         {
00106             // Translate the double into a 64 bit long.
00107             long testThisBits = BitConverter.DoubleToInt64Bits(testThis);
00108             return FastBitcount((ulong)testThisBits);
00109         }

int NewGamePhysics.Utilities.BitCount.FastBitcount ( long  testThis  ) 

Find the number of bits in the parameter int.

Parameters:
testThis The number to count the bits of.
Returns:
The number of bits in the parameter.

Definition at line 94 of file BitCount.cs.

00095         {
00096             return FastBitcount((ulong)testThis);
00097         }

int NewGamePhysics.Utilities.BitCount.FastBitcount ( ulong  testThis  ) 

Find the number of bits in the parameter long.

Parameters:
testThis The number to count the bits of.
Returns:
The number of bits in the parameter.

Definition at line 81 of file BitCount.cs.

00082         {
00083             return bitcountCache[(testThis >> (0 * 16)) & 65535L] +
00084                    bitcountCache[(testThis >> (1 * 16)) & 65535L] +
00085                    bitcountCache[(testThis >> (2 * 16)) & 65535L] +
00086                    bitcountCache[(testThis >> (3 * 16)) & 65535L];
00087         }

int NewGamePhysics.Utilities.BitCount.FastBitcount ( int  testThis  ) 

Find the number of bits in the parameter int.

Parameters:
testThis The number to count the bits of.
Returns:
The number of bits in the parameter.

Definition at line 71 of file BitCount.cs.

00072         {
00073             return FastBitcount((uint)testThis);
00074         }

int NewGamePhysics.Utilities.BitCount.FastBitcount ( uint  testThis  ) 

Find the number of bits in the parameter uint.

Parameters:
testThis The number to count the bits of.
Returns:
The number of bits in the parameter.

Definition at line 60 of file BitCount.cs.

00061         {
00062             return bitcountCache[(testThis >> (0 * 16)) & 65535] +
00063                    bitcountCache[(testThis >> (1 * 16)) & 65535];
00064         }

int NewGamePhysics.Utilities.BitCount.FastBitcount ( short  testThis  ) 

Find the number of bits in the parameter short.

Parameters:
testThis The number to count the bits of.
Returns:
The number of bits in the parameter.

Definition at line 50 of file BitCount.cs.

00051         {
00052             return FastBitcount((ushort)testThis);
00053         }

int NewGamePhysics.Utilities.BitCount.FastBitcount ( ushort  testThis  ) 

Find the number of bits in the parameter ushort.

Parameters:
testThis The number to count the bits of.
Returns:
The number of bits in the parameter.

Definition at line 40 of file BitCount.cs.

00041         {
00042             return bitcountCache[testThis];
00043         }

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