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type scoreInt uint64 | |
var ( | |
// If you think I came up with these values by hand... LOL | |
// | |
// Each bit in a value represents the presence or absence | |
// of a score multiplier in the 8x8 upper-left corner of | |
// the board. | |
TWInt = scoreInt(0x8000000000000081) | |
DWInt = scoreInt(0x100000810204000) | |
TLInt = scoreInt(0x440000000400) | |
DLInt = scoreInt(0x1022000081020010) | |
NoneInt = scoreInt(0x6eddbbf76eddbb6e) | |
) | |
// ScoreAtInt uses Fanciness to return the score multiplier at x, y. | |
func ScoreAtInt(x, y int) ScoreType { | |
// [adjustments for x or y > 7 omitted for brevity...] | |
// Now THIS is why I studied CS!!!!!!1010110110 amirite? | |
mask := scoreInt(1 << (uint(y)*8 + uint(7-x))) | |
// These switch cases are ordered such that the more | |
// common cases should return earlier than the less common, | |
// leading to fewer checks overall. | |
switch { | |
case NoneInt&mask > 0: | |
return None | |
case DLInt&mask > 0: | |
return DL | |
case DWInt&mask > 0: | |
return DW | |
case TLInt&mask > 0: | |
return TL | |
case TWInt&mask > 0: | |
return TW | |
} | |
return None // Should not happen, but 0xIDGAF | |
} |
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