Tables.h

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/*
 
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*/


/////////////////////////////////////////////////////////////////////
/// Tables.h
///
/// For gathering the lookup tables in one place.
/////////////////////////////////////////////////////////////////////

#ifndef TABLES_H
#define TABLES_H

/////////////////////////////////////////////////////////////////////
/// @addtogroup BitmapProcessingGroup
/** @{ */

const int SIZE_BYTE = 8;
const int SIZE_INT = sizeof(int);
const int SIZE_UINT = sizeof(unsigned int);
const int SIZE_USHORT = sizeof(unsigned short);

const int SHORT_PER_INT = SIZE_UINT / SIZE_USHORT;
const int BITS_PER_INT = SIZE_UINT * SIZE_BYTE;
const int BITS_PER_SHORT = SIZE_USHORT * SIZE_BYTE;


/// Bit32Table[i] contains a 1 at only position i
const unsigned int Bit32Table[32] =
    {
        2147483648UL, 1073741824UL, 536870912UL, 268435456UL,
        134217728, 67108864, 33554432, 16777216,
        8388608, 4194304, 2097152, 1048576,
        524288, 262144, 131072, 65536,
        32768, 16384, 8192, 4096,
        2048, 1024, 512, 256,
        128, 64, 32, 16,
        8, 4, 2, 1
    };

/// Bit16Table[i] contains a 1 at only position i
const int Bit16Table[16] =
    {
        32768, 16384, 8192, 4096, 2048, 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 1
    };


/// CountTable[i] contains the number of 1's in the byte value of i
const char CountTable[256] =
    {
        0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4, 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 1,
        2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, 1,
        2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, 2,
        3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, 4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8
    };

/** @} */

#endif

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