go_goutils/bitmask/bitmasks.go

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package bitmask
// MaskBit is a flag container.
type MaskBit uint8
/*
NewMaskBit is a convenience function.
It will return a MaskBit with a (referenced) value of 0, so set your consts up accordingly.
It is highly recommended to set this default as a "None" flag (separate from your iotas!)
as shown in the example.
*/
func NewMaskBit() (m *MaskBit) {
m = new(MaskBit)
return
}
// HasFlag is true if m has MaskBit flag set/enabled.
func (m *MaskBit) HasFlag(flag MaskBit) (r bool) {
var b MaskBit = *m
if b&flag != 0 {
r = true
}
return
}
// AddFlag adds MaskBit flag to m.
func (m *MaskBit) AddFlag(flag MaskBit) {
*m |= flag
return
}
// ClearFlag removes MaskBit flag from m.
func (m *MaskBit) ClearFlag(flag MaskBit) {
*m &= flag
return
}
// ToggleFlag switches MaskBit flag in m to its inverse; if true, it is now false and vice versa.
func (m *MaskBit) ToggleFlag(flag MaskBit) {
*m ^= flag
return
}