go_goutils/bitmask/bitmask.go

package bitmask

// MaskBit is a flag container.
type MaskBit uint

/*
	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
}

// NewMaskBitExplicit is like NewMaskBit, but allows you to specify a non-zero (0x0) value.
func NewMaskBitExplicit(value uint) (m *MaskBit) {

	var v MaskBit = MaskBit(value)

	m = &v

	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
}

// Value returns the current raw uint value of a MaskBit.
func (m *MaskBit) Value() (v uint) {

	v = uint(*m)

	return
}