42 lines
798 B
Go
42 lines
798 B
Go
// +build dev
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package hodl
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import (
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"fmt"
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"strings"
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)
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// MaskFromFlags merges a variadic set of Flags into a single Mask.
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func MaskFromFlags(flags ...Flag) Mask {
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var mask Mask
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for _, flag := range flags {
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mask |= Mask(flag)
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}
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return mask
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}
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// Active returns true if the bit corresponding to the flag is set within the
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// mask.
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func (m Mask) Active(flag Flag) bool {
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return (Flag(m) & flag) > 0
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}
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// String returns a human-readable description of all active Flags.
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func (m Mask) String() string {
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if m == MaskNone {
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return "hodl.Mask(NONE)"
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}
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var activeFlags []string
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for i := uint(0); i < 32; i++ {
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flag := Flag(1 << i)
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if m.Active(flag) {
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activeFlags = append(activeFlags, flag.String())
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}
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}
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return fmt.Sprintf("hodl.Mask(%s)", strings.Join(activeFlags, "|"))
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}
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