const compress/flate.windowMask

7 uses

	compress/flate (current package)
		deflate.go#L36: 	windowMask     = windowSize - 1
		deflate.go#L245: 			s.hashPrev[di&windowMask] = s.hashHead[newH]
		deflate.go#L310: 		i = d.state.hashPrev[i&windowMask] - d.state.hashOffset
		deflate.go#L422: 					s.hashPrev[s.index&windowMask] = ch
		deflate.go#L457: 			s.hashPrev[s.index&windowMask] = ch
		deflate.go#L526: 			s.hashPrev[s.index&windowMask] = ch
		deflate.go#L569: 					s.hashPrev[di&windowMask] = s.hashHead[newH]