37 lines
666 B
C
37 lines
666 B
C
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#include <stdint.h>
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#include <stdio.h>
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static const uint8_t IndexTable[4] = { 1, 3, 2, 0 };
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int convert( int v )
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{
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int v0 = v & 0x3;
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int v1 = ( v >> 2 ) & 0x3;
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int v2 = ( v >> 4 ) & 0x3;
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int v3 = ( v >> 6 );
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int t0 = IndexTable[v0];
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int t1 = IndexTable[v1];
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int t2 = IndexTable[v2];
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int t3 = IndexTable[v3];
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return t0 | ( t1 << 2 ) | ( t2 << 4 ) | ( t3 << 6 );
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}
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int main()
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{
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for( int i=0; i<256; i++ )
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{
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if( i % 16 == 15 )
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{
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printf( "%i,\n", convert( i ) );
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}
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else
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{
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printf( "%i,\t", convert( i ) );
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}
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}
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printf( "\n" );
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return 0;
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}
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