chore: update github.com/couchbase/gomemcached and github.com/couchbase/go-couchbase (#9419)
Antoine GIRARD
5 years ago
committed by
techknowlogick
parent
8873a80276
commit
559fb6ccf0
@ -0,0 +1,123 @@ |
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package memcached |
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import ( |
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"encoding/json" |
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"fmt" |
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) |
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// Collection based filter
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type CollectionsFilter struct { |
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ManifestUid uint64 |
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UseManifestUid bool |
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StreamId uint16 |
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UseStreamId bool |
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// Use either ScopeId OR CollectionsList, not both
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CollectionsList []uint32 |
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ScopeId uint32 |
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} |
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type nonStreamIdNonResumeScopeMeta struct { |
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ScopeId string `json:"scope"` |
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} |
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type nonStreamIdResumeScopeMeta struct { |
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ManifestId string `json:"uid"` |
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} |
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type nonStreamIdNonResumeCollectionsMeta struct { |
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CollectionsList []string `json:"collections"` |
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} |
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type nonStreamIdResumeCollectionsMeta struct { |
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ManifestId string `json:"uid"` |
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CollectionsList []string `json:"collections"` |
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} |
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type streamIdNonResumeCollectionsMeta struct { |
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CollectionsList []string `json:"collections"` |
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StreamId uint16 `json:"sid"` |
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} |
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type streamIdNonResumeScopeMeta struct { |
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ScopeId string `json:"scope"` |
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StreamId uint16 `json:"sid"` |
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} |
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func (c *CollectionsFilter) IsValid() error { |
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if c.UseManifestUid { |
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return fmt.Errorf("Not implemented yet") |
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} |
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if len(c.CollectionsList) > 0 && c.ScopeId > 0 { |
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return fmt.Errorf("Collection list is specified but scope ID is also specified") |
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} |
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return nil |
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} |
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func (c *CollectionsFilter) outputCollectionsFilterColList() (outputList []string) { |
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for _, collectionUint := range c.CollectionsList { |
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outputList = append(outputList, fmt.Sprintf("%x", collectionUint)) |
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} |
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return |
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} |
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func (c *CollectionsFilter) outputScopeId() string { |
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return fmt.Sprintf("%x", c.ScopeId) |
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} |
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func (c *CollectionsFilter) ToStreamReqBody() ([]byte, error) { |
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if err := c.IsValid(); err != nil { |
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return nil, err |
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} |
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var output interface{} |
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switch c.UseStreamId { |
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case true: |
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switch c.UseManifestUid { |
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case true: |
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// TODO
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return nil, fmt.Errorf("NotImplemented0") |
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case false: |
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switch len(c.CollectionsList) > 0 { |
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case true: |
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filter := &streamIdNonResumeCollectionsMeta{ |
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StreamId: c.StreamId, |
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CollectionsList: c.outputCollectionsFilterColList(), |
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} |
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output = *filter |
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case false: |
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filter := &streamIdNonResumeScopeMeta{ |
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StreamId: c.StreamId, |
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ScopeId: c.outputScopeId(), |
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} |
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output = *filter |
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} |
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} |
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case false: |
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switch c.UseManifestUid { |
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case true: |
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// TODO
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return nil, fmt.Errorf("NotImplemented1") |
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case false: |
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switch len(c.CollectionsList) > 0 { |
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case true: |
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filter := &nonStreamIdNonResumeCollectionsMeta{ |
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CollectionsList: c.outputCollectionsFilterColList(), |
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} |
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output = *filter |
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case false: |
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output = nonStreamIdNonResumeScopeMeta{ScopeId: c.outputScopeId()} |
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} |
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} |
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} |
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data, err := json.Marshal(output) |
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if err != nil { |
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return nil, err |
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} else { |
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return data, nil |
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} |
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} |
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@ -0,0 +1,346 @@ |
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package memcached |
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import ( |
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"encoding/binary" |
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"fmt" |
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"github.com/couchbase/gomemcached" |
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"math" |
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) |
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type SystemEventType int |
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const InvalidSysEvent SystemEventType = -1 |
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const ( |
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CollectionCreate SystemEventType = 0 |
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CollectionDrop SystemEventType = iota |
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CollectionFlush SystemEventType = iota // KV did not implement
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ScopeCreate SystemEventType = iota |
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ScopeDrop SystemEventType = iota |
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CollectionChanged SystemEventType = iota |
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) |
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type ScopeCreateEvent interface { |
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GetSystemEventName() (string, error) |
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GetScopeId() (uint32, error) |
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GetManifestId() (uint64, error) |
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} |
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type CollectionCreateEvent interface { |
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GetSystemEventName() (string, error) |
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GetScopeId() (uint32, error) |
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GetCollectionId() (uint32, error) |
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GetManifestId() (uint64, error) |
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GetMaxTTL() (uint32, error) |
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} |
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type CollectionDropEvent interface { |
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GetScopeId() (uint32, error) |
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GetCollectionId() (uint32, error) |
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GetManifestId() (uint64, error) |
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} |
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type ScopeDropEvent interface { |
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GetScopeId() (uint32, error) |
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GetManifestId() (uint64, error) |
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} |
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type CollectionChangedEvent interface { |
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GetCollectionId() (uint32, error) |
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GetManifestId() (uint64, error) |
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GetMaxTTL() (uint32, error) |
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} |
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var ErrorInvalidOp error = fmt.Errorf("Invalid Operation") |
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var ErrorInvalidVersion error = fmt.Errorf("Invalid version for parsing") |
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var ErrorValueTooShort error = fmt.Errorf("Value length is too short") |
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var ErrorNoMaxTTL error = fmt.Errorf("This event has no max TTL") |
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// UprEvent memcached events for UPR streams.
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type UprEvent struct { |
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Opcode gomemcached.CommandCode // Type of event
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Status gomemcached.Status // Response status
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VBucket uint16 // VBucket this event applies to
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DataType uint8 // data type
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Opaque uint16 // 16 MSB of opaque
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VBuuid uint64 // This field is set by downstream
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Flags uint32 // Item flags
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Expiry uint32 // Item expiration time
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Key, Value []byte // Item key/value
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OldValue []byte // TODO: TBD: old document value
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Cas uint64 // CAS value of the item
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Seqno uint64 // sequence number of the mutation
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RevSeqno uint64 // rev sequence number : deletions
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LockTime uint32 // Lock time
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MetadataSize uint16 // Metadata size
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SnapstartSeq uint64 // start sequence number of this snapshot
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SnapendSeq uint64 // End sequence number of the snapshot
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SnapshotType uint32 // 0: disk 1: memory
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FailoverLog *FailoverLog // Failover log containing vvuid and sequnce number
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Error error // Error value in case of a failure
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ExtMeta []byte // Extended Metadata
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AckSize uint32 // The number of bytes that can be Acked to DCP
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SystemEvent SystemEventType // Only valid if IsSystemEvent() is true
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SysEventVersion uint8 // Based on the version, the way Extra bytes is parsed is different
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ValueLen int // Cache it to avoid len() calls for performance
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CollectionId uint64 // Valid if Collection is in use
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} |
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// FailoverLog containing vvuid and sequnce number
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type FailoverLog [][2]uint64 |
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func makeUprEvent(rq gomemcached.MCRequest, stream *UprStream, bytesReceivedFromDCP int) *UprEvent { |
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event := &UprEvent{ |
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Opcode: rq.Opcode, |
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VBucket: stream.Vbucket, |
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VBuuid: stream.Vbuuid, |
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Value: rq.Body, |
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Cas: rq.Cas, |
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ExtMeta: rq.ExtMeta, |
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DataType: rq.DataType, |
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ValueLen: len(rq.Body), |
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SystemEvent: InvalidSysEvent, |
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CollectionId: math.MaxUint64, |
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} |
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event.PopulateFieldsBasedOnStreamType(rq, stream.StreamType) |
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// set AckSize for events that need to be acked to DCP,
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// i.e., events with CommandCodes that need to be buffered in DCP
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if _, ok := gomemcached.BufferedCommandCodeMap[rq.Opcode]; ok { |
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event.AckSize = uint32(bytesReceivedFromDCP) |
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} |
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// 16 LSBits are used by client library to encode vbucket number.
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// 16 MSBits are left for application to multiplex on opaque value.
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event.Opaque = appOpaque(rq.Opaque) |
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if len(rq.Extras) >= uprMutationExtraLen && |
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event.Opcode == gomemcached.UPR_MUTATION { |
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event.Seqno = binary.BigEndian.Uint64(rq.Extras[:8]) |
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event.RevSeqno = binary.BigEndian.Uint64(rq.Extras[8:16]) |
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event.Flags = binary.BigEndian.Uint32(rq.Extras[16:20]) |
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event.Expiry = binary.BigEndian.Uint32(rq.Extras[20:24]) |
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event.LockTime = binary.BigEndian.Uint32(rq.Extras[24:28]) |
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event.MetadataSize = binary.BigEndian.Uint16(rq.Extras[28:30]) |
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} else if len(rq.Extras) >= uprDeletetionWithDeletionTimeExtraLen && |
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event.Opcode == gomemcached.UPR_DELETION { |
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event.Seqno = binary.BigEndian.Uint64(rq.Extras[:8]) |
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event.RevSeqno = binary.BigEndian.Uint64(rq.Extras[8:16]) |
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event.Expiry = binary.BigEndian.Uint32(rq.Extras[16:20]) |
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} else if len(rq.Extras) >= uprDeletetionExtraLen && |
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event.Opcode == gomemcached.UPR_DELETION || |
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event.Opcode == gomemcached.UPR_EXPIRATION { |
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event.Seqno = binary.BigEndian.Uint64(rq.Extras[:8]) |
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event.RevSeqno = binary.BigEndian.Uint64(rq.Extras[8:16]) |
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event.MetadataSize = binary.BigEndian.Uint16(rq.Extras[16:18]) |
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} else if len(rq.Extras) >= uprSnapshotExtraLen && |
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event.Opcode == gomemcached.UPR_SNAPSHOT { |
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event.SnapstartSeq = binary.BigEndian.Uint64(rq.Extras[:8]) |
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event.SnapendSeq = binary.BigEndian.Uint64(rq.Extras[8:16]) |
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event.SnapshotType = binary.BigEndian.Uint32(rq.Extras[16:20]) |
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} else if event.IsSystemEvent() { |
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event.PopulateEvent(rq.Extras) |
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} |
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return event |
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} |
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func (event *UprEvent) PopulateFieldsBasedOnStreamType(rq gomemcached.MCRequest, streamType DcpStreamType) { |
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switch streamType { |
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case CollectionsNonStreamId: |
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switch rq.Opcode { |
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// Only these will have CID encoded within the key
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case gomemcached.UPR_MUTATION, |
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gomemcached.UPR_DELETION, |
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gomemcached.UPR_EXPIRATION: |
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uleb128 := Uleb128(rq.Key) |
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result, bytesShifted := uleb128.ToUint64(rq.Keylen) |
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event.CollectionId = result |
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event.Key = rq.Key[bytesShifted:] |
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default: |
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event.Key = rq.Key |
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} |
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case CollectionsStreamId: |
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// TODO - not implemented
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fallthrough |
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case NonCollectionStream: |
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// Let default behavior be legacy stream type
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fallthrough |
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default: |
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event.Key = rq.Key |
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} |
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} |
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func (event *UprEvent) String() string { |
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name := gomemcached.CommandNames[event.Opcode] |
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if name == "" { |
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name = fmt.Sprintf("#%d", event.Opcode) |
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} |
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return name |
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} |
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func (event *UprEvent) IsSnappyDataType() bool { |
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return event.Opcode == gomemcached.UPR_MUTATION && (event.DataType&SnappyDataType > 0) |
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} |
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func (event *UprEvent) IsCollectionType() bool { |
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return event.IsSystemEvent() || event.CollectionId <= math.MaxUint32 |
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} |
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func (event *UprEvent) IsSystemEvent() bool { |
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return event.Opcode == gomemcached.DCP_SYSTEM_EVENT |
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} |
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func (event *UprEvent) PopulateEvent(extras []byte) { |
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if len(extras) < dcpSystemEventExtraLen { |
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// Wrong length, don't parse
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return |
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} |
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event.Seqno = binary.BigEndian.Uint64(extras[:8]) |
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event.SystemEvent = SystemEventType(binary.BigEndian.Uint32(extras[8:12])) |
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var versionTemp uint16 = binary.BigEndian.Uint16(extras[12:14]) |
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event.SysEventVersion = uint8(versionTemp >> 8) |
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} |
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func (event *UprEvent) GetSystemEventName() (string, error) { |
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switch event.SystemEvent { |
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case CollectionCreate: |
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fallthrough |
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case ScopeCreate: |
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return string(event.Key), nil |
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default: |
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return "", ErrorInvalidOp |
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} |
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} |
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func (event *UprEvent) GetManifestId() (uint64, error) { |
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switch event.SystemEvent { |
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// Version 0 only checks
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case CollectionChanged: |
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fallthrough |
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case ScopeDrop: |
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fallthrough |
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case ScopeCreate: |
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fallthrough |
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case CollectionDrop: |
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if event.SysEventVersion > 0 { |
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return 0, ErrorInvalidVersion |
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} |
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fallthrough |
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case CollectionCreate: |
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// CollectionCreate supports version 1
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if event.SysEventVersion > 1 { |
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return 0, ErrorInvalidVersion |
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} |
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if event.ValueLen < 8 { |
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return 0, ErrorValueTooShort |
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} |
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return binary.BigEndian.Uint64(event.Value[0:8]), nil |
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default: |
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return 0, ErrorInvalidOp |
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} |
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} |
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func (event *UprEvent) GetCollectionId() (uint32, error) { |
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switch event.SystemEvent { |
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case CollectionDrop: |
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if event.SysEventVersion > 0 { |
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return 0, ErrorInvalidVersion |
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} |
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fallthrough |
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case CollectionCreate: |
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if event.SysEventVersion > 1 { |
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return 0, ErrorInvalidVersion |
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} |
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if event.ValueLen < 16 { |
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return 0, ErrorValueTooShort |
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} |
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return binary.BigEndian.Uint32(event.Value[12:16]), nil |
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case CollectionChanged: |
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if event.SysEventVersion > 0 { |
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return 0, ErrorInvalidVersion |
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} |
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if event.ValueLen < 12 { |
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return 0, ErrorValueTooShort |
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} |
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return binary.BigEndian.Uint32(event.Value[8:12]), nil |
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default: |
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return 0, ErrorInvalidOp |
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} |
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} |
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func (event *UprEvent) GetScopeId() (uint32, error) { |
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switch event.SystemEvent { |
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// version 0 checks
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case ScopeCreate: |
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fallthrough |
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case ScopeDrop: |
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fallthrough |
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case CollectionDrop: |
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if event.SysEventVersion > 0 { |
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return 0, ErrorInvalidVersion |
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} |
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fallthrough |
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case CollectionCreate: |
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// CollectionCreate could be either 0 or 1
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if event.SysEventVersion > 1 { |
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return 0, ErrorInvalidVersion |
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} |
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if event.ValueLen < 12 { |
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return 0, ErrorValueTooShort |
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} |
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return binary.BigEndian.Uint32(event.Value[8:12]), nil |
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default: |
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return 0, ErrorInvalidOp |
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} |
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} |
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func (event *UprEvent) GetMaxTTL() (uint32, error) { |
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switch event.SystemEvent { |
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case CollectionCreate: |
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if event.SysEventVersion < 1 { |
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return 0, ErrorNoMaxTTL |
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} |
||||||
|
if event.ValueLen < 20 { |
||||||
|
return 0, ErrorValueTooShort |
||||||
|
} |
||||||
|
return binary.BigEndian.Uint32(event.Value[16:20]), nil |
||||||
|
case CollectionChanged: |
||||||
|
if event.SysEventVersion > 0 { |
||||||
|
return 0, ErrorInvalidVersion |
||||||
|
} |
||||||
|
if event.ValueLen < 16 { |
||||||
|
return 0, ErrorValueTooShort |
||||||
|
} |
||||||
|
return binary.BigEndian.Uint32(event.Value[12:16]), nil |
||||||
|
default: |
||||||
|
return 0, ErrorInvalidOp |
||||||
|
} |
||||||
|
} |
||||||
|
|
||||||
|
type Uleb128 []byte |
||||||
|
|
||||||
|
func (u Uleb128) ToUint64(cachedLen int) (result uint64, bytesShifted int) { |
||||||
|
var shift uint = 0 |
||||||
|
|
||||||
|
for curByte := 0; curByte < cachedLen; curByte++ { |
||||||
|
oneByte := u[curByte] |
||||||
|
last7Bits := 0x7f & oneByte |
||||||
|
result |= uint64(last7Bits) << shift |
||||||
|
bytesShifted++ |
||||||
|
if oneByte&0x80 == 0 { |
||||||
|
break |
||||||
|
} |
||||||
|
shift += 7 |
||||||
|
} |
||||||
|
|
||||||
|
return |
||||||
|
} |
||||||
@ -0,0 +1,381 @@ |
|||||||
|
package gomemcached |
||||||
|
|
||||||
|
import ( |
||||||
|
"encoding/binary" |
||||||
|
"fmt" |
||||||
|
) |
||||||
|
|
||||||
|
type FrameObjType int |
||||||
|
|
||||||
|
const ( |
||||||
|
FrameBarrier FrameObjType = iota |
||||||
|
FrameDurability FrameObjType = iota |
||||||
|
FrameDcpStreamId FrameObjType = iota |
||||||
|
FrameOpenTracing FrameObjType = iota |
||||||
|
) |
||||||
|
|
||||||
|
type FrameInfo struct { |
||||||
|
ObjId FrameObjType |
||||||
|
ObjLen int |
||||||
|
ObjData []byte |
||||||
|
} |
||||||
|
|
||||||
|
var ErrorInvalidOp error = fmt.Errorf("Specified method is not applicable") |
||||||
|
var ErrorObjLenNotMatch error = fmt.Errorf("Object length does not match data") |
||||||
|
|
||||||
|
func (f *FrameInfo) Validate() error { |
||||||
|
switch f.ObjId { |
||||||
|
case FrameBarrier: |
||||||
|
if f.ObjLen != 0 { |
||||||
|
return fmt.Errorf("Invalid FrameBarrier - length is %v\n", f.ObjLen) |
||||||
|
} else if f.ObjLen != len(f.ObjData) { |
||||||
|
return ErrorObjLenNotMatch |
||||||
|
} |
||||||
|
case FrameDurability: |
||||||
|
if f.ObjLen != 1 && f.ObjLen != 3 { |
||||||
|
return fmt.Errorf("Invalid FrameDurability - length is %v\n", f.ObjLen) |
||||||
|
} else if f.ObjLen != len(f.ObjData) { |
||||||
|
return ErrorObjLenNotMatch |
||||||
|
} |
||||||
|
case FrameDcpStreamId: |
||||||
|
if f.ObjLen != 2 { |
||||||
|
return fmt.Errorf("Invalid FrameDcpStreamId - length is %v\n", f.ObjLen) |
||||||
|
} else if f.ObjLen != len(f.ObjData) { |
||||||
|
return ErrorObjLenNotMatch |
||||||
|
} |
||||||
|
case FrameOpenTracing: |
||||||
|
if f.ObjLen == 0 { |
||||||
|
return fmt.Errorf("Invalid FrameOpenTracing - length must be > 0") |
||||||
|
} else if f.ObjLen != len(f.ObjData) { |
||||||
|
return ErrorObjLenNotMatch |
||||||
|
} |
||||||
|
default: |
||||||
|
return fmt.Errorf("Unknown FrameInfo type") |
||||||
|
} |
||||||
|
return nil |
||||||
|
} |
||||||
|
|
||||||
|
func (f *FrameInfo) GetStreamId() (uint16, error) { |
||||||
|
if f.ObjId != FrameDcpStreamId { |
||||||
|
return 0, ErrorInvalidOp |
||||||
|
} |
||||||
|
|
||||||
|
var output uint16 |
||||||
|
output = uint16(f.ObjData[0]) |
||||||
|
output = output << 8 |
||||||
|
output |= uint16(f.ObjData[1]) |
||||||
|
return output, nil |
||||||
|
} |
||||||
|
|
||||||
|
type DurabilityLvl uint8 |
||||||
|
|
||||||
|
const ( |
||||||
|
DuraInvalid DurabilityLvl = iota // Not used (0x0)
|
||||||
|
DuraMajority DurabilityLvl = iota // (0x01)
|
||||||
|
DuraMajorityAndPersistOnMaster DurabilityLvl = iota // (0x02)
|
||||||
|
DuraPersistToMajority DurabilityLvl = iota // (0x03)
|
||||||
|
) |
||||||
|
|
||||||
|
func (f *FrameInfo) GetDurabilityRequirements() (lvl DurabilityLvl, timeoutProvided bool, timeoutMs uint16, err error) { |
||||||
|
if f.ObjId != FrameDurability { |
||||||
|
err = ErrorInvalidOp |
||||||
|
return |
||||||
|
} |
||||||
|
if f.ObjLen != 1 && f.ObjLen != 3 { |
||||||
|
err = ErrorObjLenNotMatch |
||||||
|
return |
||||||
|
} |
||||||
|
|
||||||
|
lvl = DurabilityLvl(uint8(f.ObjData[0])) |
||||||
|
|
||||||
|
if f.ObjLen == 3 { |
||||||
|
timeoutProvided = true |
||||||
|
timeoutMs = binary.BigEndian.Uint16(f.ObjData[1:2]) |
||||||
|
} |
||||||
|
|
||||||
|
return |
||||||
|
} |
||||||
|
|
||||||
|
func incrementMarker(bitsToBeIncremented, byteIncrementCnt *int, framingElen, curObjIdx int) (int, error) { |
||||||
|
for *bitsToBeIncremented >= 8 { |
||||||
|
*byteIncrementCnt++ |
||||||
|
*bitsToBeIncremented -= 8 |
||||||
|
} |
||||||
|
marker := curObjIdx + *byteIncrementCnt |
||||||
|
if marker > framingElen { |
||||||
|
return -1, fmt.Errorf("Out of bounds") |
||||||
|
} |
||||||
|
return marker, nil |
||||||
|
} |
||||||
|
|
||||||
|
// Right now, halfByteRemaining will always be false, because ObjID and Len haven't gotten that large yet
|
||||||
|
func (f *FrameInfo) Bytes() (output []byte, halfByteRemaining bool) { |
||||||
|
// ObjIdentifier - 4 bits + ObjLength - 4 bits
|
||||||
|
var idAndLen uint8 |
||||||
|
idAndLen |= uint8(f.ObjId) << 4 |
||||||
|
idAndLen |= uint8(f.ObjLen) |
||||||
|
output = append(output, byte(idAndLen)) |
||||||
|
|
||||||
|
// Rest is Data
|
||||||
|
output = append(output, f.ObjData...) |
||||||
|
return |
||||||
|
} |
||||||
|
|
||||||
|
func parseFrameInfoObjects(buf []byte, framingElen int) (objs []FrameInfo, err error, halfByteRemaining bool) { |
||||||
|
var curObjIdx int |
||||||
|
var byteIncrementCnt int |
||||||
|
var bitsToBeIncremented int |
||||||
|
var marker int |
||||||
|
|
||||||
|
// Parse frameInfo objects
|
||||||
|
for curObjIdx = 0; curObjIdx < framingElen; curObjIdx += byteIncrementCnt { |
||||||
|
byteIncrementCnt = 0 |
||||||
|
var oneFrameObj FrameInfo |
||||||
|
|
||||||
|
// First get the objId
|
||||||
|
// -------------------------
|
||||||
|
var objId int |
||||||
|
var objHeader uint8 = buf[curObjIdx] |
||||||
|
var objIdentifierRaw uint8 |
||||||
|
if bitsToBeIncremented == 0 { |
||||||
|
// ObjHeader
|
||||||
|
// 0 1 2 3 4 5 6 7
|
||||||
|
// ^-----^
|
||||||
|
// ObjIdentifierRaw
|
||||||
|
objIdentifierRaw = (objHeader & 0xf0) >> 4 |
||||||
|
} else { |
||||||
|
// ObjHeader
|
||||||
|
// 0 1 2 3 4 5 6 7
|
||||||
|
// ^-----^
|
||||||
|
// ObjIdentifierRaw
|
||||||
|
objIdentifierRaw = (objHeader & 0x0f) |
||||||
|
} |
||||||
|
bitsToBeIncremented += 4 |
||||||
|
|
||||||
|
marker, err = incrementMarker(&bitsToBeIncremented, &byteIncrementCnt, framingElen, curObjIdx) |
||||||
|
if err != nil { |
||||||
|
return |
||||||
|
} |
||||||
|
|
||||||
|
// Value is 0-14
|
||||||
|
objId = int(objIdentifierRaw & 0xe) |
||||||
|
// If bit 15 is set, ID is 15 + value of next byte
|
||||||
|
if objIdentifierRaw&0x1 > 0 { |
||||||
|
if bitsToBeIncremented > 0 { |
||||||
|
// ObjHeader
|
||||||
|
// 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
|
||||||
|
// ^-----^ ^---------------^
|
||||||
|
// ObjId1 Extension
|
||||||
|
// ^ marker
|
||||||
|
buffer := uint16(buf[marker]) |
||||||
|
buffer = buffer << 8 |
||||||
|
buffer |= uint16(buf[marker+1]) |
||||||
|
var extension uint8 = uint8(buffer & 0xff0 >> 4) |
||||||
|
objId += int(extension) |
||||||
|
} else { |
||||||
|
// ObjHeader
|
||||||
|
// 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
|
||||||
|
// ^-----^ ^-------------------^
|
||||||
|
// ObjId1 extension
|
||||||
|
// ^ marker
|
||||||
|
var extension uint8 = uint8(buf[marker]) |
||||||
|
objId += int(extension) |
||||||
|
} |
||||||
|
bitsToBeIncremented += 8 |
||||||
|
} |
||||||
|
|
||||||
|
marker, err = incrementMarker(&bitsToBeIncremented, &byteIncrementCnt, framingElen, curObjIdx) |
||||||
|
if err != nil { |
||||||
|
return |
||||||
|
} |
||||||
|
oneFrameObj.ObjId = FrameObjType(objId) |
||||||
|
|
||||||
|
// Then get the obj length
|
||||||
|
// -------------------------
|
||||||
|
var objLenRaw uint8 |
||||||
|
var objLen int |
||||||
|
if bitsToBeIncremented > 0 { |
||||||
|
// ObjHeader
|
||||||
|
// 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
|
||||||
|
// ^ ^---------^
|
||||||
|
// marker objLen
|
||||||
|
objLenRaw = uint8(buf[marker]) & 0x0f |
||||||
|
} else { |
||||||
|
// ObjHeader
|
||||||
|
// 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
|
||||||
|
// ^--------^
|
||||||
|
// objLen
|
||||||
|
// ^ marker
|
||||||
|
objLenRaw = uint8(buf[marker]) & 0xf0 >> 4 |
||||||
|
} |
||||||
|
bitsToBeIncremented += 4 |
||||||
|
|
||||||
|
marker, err = incrementMarker(&bitsToBeIncremented, &byteIncrementCnt, framingElen, curObjIdx) |
||||||
|
if err != nil { |
||||||
|
return |
||||||
|
} |
||||||
|
|
||||||
|
// Length is 0-14
|
||||||
|
objLen = int(objLenRaw & 0xe) |
||||||
|
// If bit 15 is set, lenghth is 15 + value of next byte
|
||||||
|
if objLenRaw&0x1 > 0 { |
||||||
|
if bitsToBeIncremented == 0 { |
||||||
|
// ObjHeader
|
||||||
|
// 12 13 14 15 16 17 18 19 20 21 22 23
|
||||||
|
// ^---------^ ^--------------------^
|
||||||
|
// objLen extension
|
||||||
|
// ^ marker
|
||||||
|
var extension uint8 = uint8(buf[marker]) |
||||||
|
objLen += int(extension) |
||||||
|
} else { |
||||||
|
// ObjHeader
|
||||||
|
// 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
|
||||||
|
// ^--------^ ^---------------------^
|
||||||
|
// objLen extension
|
||||||
|
// ^ marker var buffer uint16
|
||||||
|
buffer := uint16(buf[marker]) |
||||||
|
buffer = buffer << 8 |
||||||
|
buffer |= uint16(buf[marker+1]) |
||||||
|
var extension uint8 = uint8(buffer & 0xff0 >> 4) |
||||||
|
objLen += int(extension) |
||||||
|
} |
||||||
|
bitsToBeIncremented += 8 |
||||||
|
} |
||||||
|
|
||||||
|
marker, err = incrementMarker(&bitsToBeIncremented, &byteIncrementCnt, framingElen, curObjIdx) |
||||||
|
if err != nil { |
||||||
|
return |
||||||
|
} |
||||||
|
oneFrameObj.ObjLen = objLen |
||||||
|
|
||||||
|
// The rest is N-bytes of data based on the length
|
||||||
|
if bitsToBeIncremented == 0 { |
||||||
|
// No weird alignment needed
|
||||||
|
oneFrameObj.ObjData = buf[marker : marker+objLen] |
||||||
|
} else { |
||||||
|
// 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
|
||||||
|
// ^--------^ ^---------------------^ ^--------->
|
||||||
|
// objLen extension data
|
||||||
|
// ^ marker
|
||||||
|
oneFrameObj.ObjData = ShiftByteSliceLeft4Bits(buf[marker : marker+objLen+1]) |
||||||
|
} |
||||||
|
err = oneFrameObj.Validate() |
||||||
|
if err != nil { |
||||||
|
return |
||||||
|
} |
||||||
|
objs = append(objs, oneFrameObj) |
||||||
|
|
||||||
|
bitsToBeIncremented += 8 * objLen |
||||||
|
marker, err = incrementMarker(&bitsToBeIncremented, &byteIncrementCnt, framingElen, curObjIdx) |
||||||
|
} |
||||||
|
|
||||||
|
if bitsToBeIncremented > 0 { |
||||||
|
halfByteRemaining = true |
||||||
|
} |
||||||
|
return |
||||||
|
} |
||||||
|
|
||||||
|
func ShiftByteSliceLeft4Bits(slice []byte) (replacement []byte) { |
||||||
|
var buffer uint16 |
||||||
|
var i int |
||||||
|
sliceLen := len(slice) |
||||||
|
|
||||||
|
if sliceLen < 2 { |
||||||
|
// Let's not shift less than 16 bits
|
||||||
|
return |
||||||
|
} |
||||||
|
|
||||||
|
replacement = make([]byte, sliceLen, cap(slice)) |
||||||
|
|
||||||
|
for i = 0; i < sliceLen-1; i++ { |
||||||
|
// 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
|
||||||
|
// ^-----^ ^---------------^ ^-----------
|
||||||
|
// garbage data byte 0 data byte 1
|
||||||
|
buffer = uint16(slice[i]) |
||||||
|
buffer = buffer << 8 |
||||||
|
buffer |= uint16(slice[i+1]) |
||||||
|
replacement[i] = uint8(buffer & 0xff0 >> 4) |
||||||
|
} |
||||||
|
|
||||||
|
if i < sliceLen { |
||||||
|
lastByte := slice[sliceLen-1] |
||||||
|
lastByte = lastByte << 4 |
||||||
|
replacement[i] = lastByte |
||||||
|
} |
||||||
|
return |
||||||
|
} |
||||||
|
|
||||||
|
// The following is used to theoretically support frameInfo ObjID extensions
|
||||||
|
// for completeness, but they are not very efficient though
|
||||||
|
func ShiftByteSliceRight4Bits(slice []byte) (replacement []byte) { |
||||||
|
var buffer uint16 |
||||||
|
var i int |
||||||
|
var leftovers uint8 // 4 bits only
|
||||||
|
var replacementUnit uint16 |
||||||
|
var first bool = true |
||||||
|
var firstLeftovers uint8 |
||||||
|
var lastLeftovers uint8 |
||||||
|
sliceLen := len(slice) |
||||||
|
|
||||||
|
if sliceLen < 2 { |
||||||
|
// Let's not shift less than 16 bits
|
||||||
|
return |
||||||
|
} |
||||||
|
|
||||||
|
if slice[sliceLen-1]&0xf == 0 { |
||||||
|
replacement = make([]byte, sliceLen, cap(slice)) |
||||||
|
} else { |
||||||
|
replacement = make([]byte, sliceLen+1, cap(slice)+1) |
||||||
|
} |
||||||
|
|
||||||
|
for i = 0; i < sliceLen-1; i++ { |
||||||
|
buffer = binary.BigEndian.Uint16(slice[i : i+2]) |
||||||
|
// (buffer)
|
||||||
|
// 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
|
||||||
|
// ^-------------^ ^-------------------^
|
||||||
|
// data byte 0 data byte 1
|
||||||
|
//
|
||||||
|
// into
|
||||||
|
//
|
||||||
|
// 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
|
||||||
|
// ^-----^ ^---------------^ ^--------------------^ ^----------^
|
||||||
|
// zeroes data byte 0 data byte 1 zeroes
|
||||||
|
|
||||||
|
if first { |
||||||
|
// The leftover OR'ing will overwrite the first 4 bits of data byte 0. Save them
|
||||||
|
firstLeftovers = uint8(buffer & 0xf000 >> 12) |
||||||
|
first = false |
||||||
|
} |
||||||
|
replacementUnit = 0 |
||||||
|
replacementUnit |= uint16(leftovers) << 12 |
||||||
|
replacementUnit |= (buffer & 0xff00) >> 4 // data byte 0
|
||||||
|
replacementUnit |= buffer & 0xff >> 4 // data byte 1 first 4 bits
|
||||||
|
lastLeftovers = uint8(buffer&0xf) << 4 |
||||||
|
|
||||||
|
replacement[i+1] = byte(replacementUnit) |
||||||
|
|
||||||
|
leftovers = uint8((buffer & 0x000f) << 4) |
||||||
|
} |
||||||
|
|
||||||
|
replacement[0] = byte(uint8(replacement[0]) | firstLeftovers) |
||||||
|
if lastLeftovers > 0 { |
||||||
|
replacement[sliceLen] = byte(lastLeftovers) |
||||||
|
} |
||||||
|
return |
||||||
|
} |
||||||
|
|
||||||
|
func Merge2HalfByteSlices(src1, src2 []byte) (output []byte) { |
||||||
|
src1Len := len(src1) |
||||||
|
src2Len := len(src2) |
||||||
|
output = make([]byte, src1Len+src2Len-1) |
||||||
|
|
||||||
|
var mergeByte uint8 = src1[src1Len-1] |
||||||
|
mergeByte |= uint8(src2[0]) |
||||||
|
|
||||||
|
copy(output, src1) |
||||||
|
copy(output[src1Len:], src2[1:]) |
||||||
|
|
||||||
|
output[src1Len-1] = byte(mergeByte) |
||||||
|
|
||||||
|
return |
||||||
|
} |
||||||
@ -1,47 +1,202 @@ |
|||||||
COUCHBASE INC. COMMUNITY EDITION LICENSE AGREEMENT |
Apache License |
||||||
|
Version 2.0, January 2004 |
||||||
IMPORTANT-READ CAREFULLY: BY CLICKING THE "I ACCEPT" BOX OR INSTALLING, |
http://www.apache.org/licenses/ |
||||||
DOWNLOADING OR OTHERWISE USING THIS SOFTWARE AND ANY ASSOCIATED |
|
||||||
DOCUMENTATION, YOU, ON BEHALF OF YOURSELF OR AS AN AUTHORIZED |
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION |
||||||
REPRESENTATIVE ON BEHALF OF AN ENTITY ("LICENSEE") AGREE TO ALL THE |
|
||||||
TERMS OF THIS COMMUNITY EDITION LICENSE AGREEMENT (THE "AGREEMENT") |
1. Definitions. |
||||||
REGARDING YOUR USE OF THE SOFTWARE. YOU REPRESENT AND WARRANT THAT YOU |
|
||||||
HAVE FULL LEGAL AUTHORITY TO BIND THE LICENSEE TO THIS AGREEMENT. IF YOU |
"License" shall mean the terms and conditions for use, reproduction, |
||||||
DO NOT AGREE WITH ALL OF THESE TERMS, DO NOT SELECT THE "I ACCEPT" BOX |
and distribution as defined by Sections 1 through 9 of this document. |
||||||
AND DO NOT INSTALL, DOWNLOAD OR OTHERWISE USE THE SOFTWARE. THE |
|
||||||
EFFECTIVE DATE OF THIS AGREEMENT IS THE DATE ON WHICH YOU CLICK "I |
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END OF TERMS AND CONDITIONS |
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APPENDIX: How to apply the Apache License to your work. |
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Licensed under the Apache License, Version 2.0 (the "License"); |
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Unless required by applicable law or agreed to in writing, software |
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