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podman could benefit from stronger typing with some of our methods and functions where uint64s, for example, are used because the unit of measurement is unknown. Also, the need to convert between storage units is critical in podman and this package supports easy conversion as needed. to start, we implement the storage units (bytes, KiB, MiB, and GiB) only. Signed-off-by: Brent Baude <bbaude@redhat.com>
66 lines
1.2 KiB
Go
66 lines
1.2 KiB
Go
package strongunits
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// supported units
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// B represents bytes
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type B uint64
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// KiB represents KiB
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type KiB uint64
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// MiB represents MiB
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type MiB uint64
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// GiB represents GiB
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type GiB uint64
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const (
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// kibToB is the math convert from bytes to KiB
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kibToB = 1 << 10
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// mibToB is the math to convert from bytes to MiB
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mibToB = 1 << 20
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// gibToB s the math to convert from bytes to GiB
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gibToB = 1 << 30
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)
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// StorageUnits is an interface for converting disk/memory storage
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// units amongst each other.
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type StorageUnits interface {
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ToBytes() B
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}
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// ToBytes is a pass-through function for bytes
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func (b B) ToBytes() B {
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return b
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}
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// ToBytes converts KiB to bytes
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func (k KiB) ToBytes() B {
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return B(k * kibToB)
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}
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// ToBytes converts MiB to bytes
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func (m MiB) ToBytes() B {
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return B(m * mibToB)
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}
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// ToBytes converts GiB to bytes
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func (g GiB) ToBytes() B {
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return B(g * gibToB)
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}
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// ToKiB converts any StorageUnit type to KiB
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func ToKiB(b StorageUnits) KiB {
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return KiB(b.ToBytes() >> 10)
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}
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// ToMib converts any StorageUnit type to MiB
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func ToMib(b StorageUnits) MiB {
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return MiB(b.ToBytes() >> 20)
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}
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// ToGiB converts any StorageUnit type to GiB
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func ToGiB(b StorageUnits) GiB {
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return GiB(b.ToBytes() >> 30)
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}
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