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52 lines
838 B
Go
52 lines
838 B
Go
package khepri
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import (
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"bytes"
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"sort"
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"github.com/fd0/khepri/backend"
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)
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type StorageMap Blobs
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func NewStorageMap() *StorageMap {
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return &StorageMap{}
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}
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func (m StorageMap) find(id backend.ID) (int, *Blob) {
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i := sort.Search(len(m), func(i int) bool {
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return bytes.Compare(m[i].ID, id) >= 0
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})
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if i < len(m) && bytes.Equal(m[i].ID, id) {
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return i, m[i]
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}
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return i, nil
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}
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func (m StorageMap) Find(id backend.ID) *Blob {
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_, blob := m.find(id)
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return blob
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}
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func (m *StorageMap) Insert(blob *Blob) {
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pos, b := m.find(blob.ID)
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if b != nil {
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// already present
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return
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}
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// insert blob
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// https://code.google.com/p/go-wiki/wiki/SliceTricks
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*m = append(*m, nil)
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copy((*m)[pos+1:], (*m)[pos:])
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(*m)[pos] = blob
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}
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func (m *StorageMap) Merge(sm *StorageMap) {
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for _, blob := range *sm {
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m.Insert(blob)
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}
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}
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