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Subject: Re: How can you get the number of a bit which is set in a bitboard ?

Author: Dann Corbit

Date: 15:59:16 08/19/99

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It's hard to guess what you are after, but there are lots of ways to manipulate
bits in an object.  Assuming that you have a char pointer to an object, and that
you do not go beyond the total bit counts for that object you can use a
technique like this:
#define bitset( buf, bit ) ( buf[(bit) >> 3] |= ( 1 << ( (bit) & 7 )))
#define bitclr( buf, bit ) ( buf[(bit) >> 3] &= ~( 1 << ( (bit) & 7 )))
#define bittog( buf, bit ) ( buf[(bit) >> 3] ^= ( 1 << ( (bit) & 7 )))
#define bitget( buf, bit ) ((( buf[(bit) >> 3] >> ( (bit) & 7 )) & 1 ))

• Re: How can you get the number of a bit which is set in a bitboard ? Robert Hyatt 18:02:15 08/19/99
  • Re: How can you get the number of a bit which is set in a bitboard ? Dann Corbit 18:19:51 08/19/99
    • Re: How can you get the number of a bit which is set in a bitboard ? Robert Hyatt 20:37:25 08/19/99

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