mirror of
https://github.com/chrislusf/seaweedfs
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64 lines
1.3 KiB
Go
64 lines
1.3 KiB
Go
// +build !5BytesOffset
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package types
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import (
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"fmt"
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)
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type OffsetHigher struct {
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// b4 byte
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}
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const (
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OffsetSize = 4
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MaxPossibleVolumeSize uint64 = 4 * 1024 * 1024 * 1024 * 8 // 32GB
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)
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func OffsetToBytes(bytes []byte, offset Offset) {
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bytes[3] = offset.b0
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bytes[2] = offset.b1
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bytes[1] = offset.b2
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bytes[0] = offset.b3
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}
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// only for testing, will be removed later.
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func Uint32ToOffset(offset uint32) Offset {
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return Offset{
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OffsetLower: OffsetLower{
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b0: byte(offset),
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b1: byte(offset >> 8),
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b2: byte(offset >> 16),
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b3: byte(offset >> 24),
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},
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}
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}
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func BytesToOffset(bytes []byte) Offset {
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return Offset{
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OffsetLower: OffsetLower{
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b0: bytes[3],
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b1: bytes[2],
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b2: bytes[1],
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b3: bytes[0],
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},
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}
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}
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func (offset Offset) IsZero() bool {
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return offset.b0 == 0 && offset.b1 == 0 && offset.b2 == 0 && offset.b3 == 0
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}
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func ToOffset(offset int64) Offset {
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smaller := uint32(offset / int64(NeedlePaddingSize))
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return Uint32ToOffset(smaller)
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}
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func (offset Offset) ToAcutalOffset() (actualOffset int64) {
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return (int64(offset.b0) + int64(offset.b1)<<8 + int64(offset.b2)<<16 + int64(offset.b3)<<24) * int64(NeedlePaddingSize)
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}
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func (offset Offset) String() string {
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return fmt.Sprintf("%d", int64(offset.b0)+int64(offset.b1)<<8+int64(offset.b2)<<16+int64(offset.b3)<<24)
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}
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