Method CheckAllValid

memstore/vectors/vector.go:283–310

CheckAllValid checks whether all bits are 1 in a bool typed vector.

()

// CheckAllValid checks whether all bits are 1 in a bool typed vector.
func (v *Vector) CheckAllValid() bool {
	i := 0
	totalCompleteBytes := v.Size / 8
	remainingBits := v.Size % 8
	wordBoundary := totalCompleteBytes - totalCompleteBytes%4

	// First check word by word.
	for ; i < wordBoundary; i += 4 {
		if !(*(*uint32)(utils.MemAccess(unsafe.Pointer(v.buffer), i)) == 0xFFFFFFFF) {
			return false
		}
	}

	// then we check byte by byte.
	for ; i < totalCompleteBytes; i++ {
		if !(*(*uint8)(utils.MemAccess(unsafe.Pointer(v.buffer), i)) == 0xFF) {
			return false
		}
	}

	if remainingBits == 0 {
		return true
	}

	// check remaining bits.
	var mask uint8 = (1 << uint(remainingBits)) - 1
	return ((*(*uint8)(utils.MemAccess(unsafe.Pointer(v.buffer), i))) & mask) == mask
}