Author: Robert Hyatt
Date: 10:23:23 07/18/02
Go up one level in this thread
On July 18, 2002 at 12:21:26, Steffen Jakob wrote:
>Hi Bob!
>
>On July 18, 2002 at 12:16:55, Robert Hyatt wrote:
>
>>
>>Extensions was a debugging tool. IE I used to have a parallel array with
>>the PV in one element and the extensions for that ply in another. Then when
>>I dumped the PV I could see which plies had extensions applied. I took that
>>out a long time back to save the time of backing up the stuff when I really
>>didn't care except on rare occasions during debugging.
>>
>>The rest are simply carry-overs. To me a&7 is clearer than a&CONST where I
>>might not remember which bits are on in CONST...
>
>I didn't think of making 7 const but something like this (from hossa-3.0 (aka
>Jockel@ICC) source):
>
>template <typename T> inline File getFile(const T &s) {
> return static_cast<File>(static_cast<unsigned int>(s) & 7);
>}
>template <typename T> inline Rank getRank(const T &s) {
> return static_cast<Rank>(static_cast<unsigned int>(s) >> 3);
>}
>
>or in C-world code
>#define getFile(s) ((s)&7)
>#define getRank(s) ((s)>>3)
>
>Greetings,
>Steffen.
I already do this. I have "Rank()" and "File()" macros that I use most
everywhere already. Ditto for "From()", "To()", "Piece()", "Captured()" to
extract that field from the 21 bit compressed move format I use internally.
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