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Implement version vectors

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This commit is contained in:
Jakob Borg
2015-03-25 22:37:35 +01:00
parent b4f45d1e79
commit 6da7f17c4a
9 changed files with 113 additions and 152 deletions
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43
internal/db/leveldb_xdr.go
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@@ -18,9 +18,9 @@ fileVersion Structure:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
+ version (64 bits) +
| |
/ /
\ Vector Structure \
/ /
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Length of device |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
@@ -31,7 +31,7 @@ fileVersion Structure:
struct fileVersion {
hyper version;
Vector version;
opaque device<>;
}
@@ -39,7 +39,7 @@ struct fileVersion {
func (o fileVersion) EncodeXDR(w io.Writer) (int, error) {
var xw = xdr.NewWriter(w)
return o.encodeXDR(xw)
return o.EncodeXDRInto(xw)
}
func (o fileVersion) MarshalXDR() ([]byte, error) {
@@ -57,29 +57,32 @@ func (o fileVersion) MustMarshalXDR() []byte {
func (o fileVersion) AppendXDR(bs []byte) ([]byte, error) {
var aw = xdr.AppendWriter(bs)
var xw = xdr.NewWriter(&aw)
_, err := o.encodeXDR(xw)
_, err := o.EncodeXDRInto(xw)
return []byte(aw), err
}
func (o fileVersion) encodeXDR(xw *xdr.Writer) (int, error) {
xw.WriteUint64(uint64(o.version))
func (o fileVersion) EncodeXDRInto(xw *xdr.Writer) (int, error) {
_, err := o.version.EncodeXDRInto(xw)
if err != nil {
return xw.Tot(), err
}
xw.WriteBytes(o.device)
return xw.Tot(), xw.Error()
}
func (o *fileVersion) DecodeXDR(r io.Reader) error {
xr := xdr.NewReader(r)
return o.decodeXDR(xr)
return o.DecodeXDRFrom(xr)
}
func (o *fileVersion) UnmarshalXDR(bs []byte) error {
var br = bytes.NewReader(bs)
var xr = xdr.NewReader(br)
return o.decodeXDR(xr)
return o.DecodeXDRFrom(xr)
}
func (o *fileVersion) decodeXDR(xr *xdr.Reader) error {
o.version = int64(xr.ReadUint64())
func (o *fileVersion) DecodeXDRFrom(xr *xdr.Reader) error {
(&o.version).DecodeXDRFrom(xr)
o.device = xr.ReadBytes()
return xr.Error()
}
@@ -107,7 +110,7 @@ struct versionList {
func (o versionList) EncodeXDR(w io.Writer) (int, error) {
var xw = xdr.NewWriter(w)
return o.encodeXDR(xw)
return o.EncodeXDRInto(xw)
}
func (o versionList) MarshalXDR() ([]byte, error) {
@@ -125,14 +128,14 @@ func (o versionList) MustMarshalXDR() []byte {
func (o versionList) AppendXDR(bs []byte) ([]byte, error) {
var aw = xdr.AppendWriter(bs)
var xw = xdr.NewWriter(&aw)
_, err := o.encodeXDR(xw)
_, err := o.EncodeXDRInto(xw)
return []byte(aw), err
}
func (o versionList) encodeXDR(xw *xdr.Writer) (int, error) {
func (o versionList) EncodeXDRInto(xw *xdr.Writer) (int, error) {
xw.WriteUint32(uint32(len(o.versions)))
for i := range o.versions {
_, err := o.versions[i].encodeXDR(xw)
_, err := o.versions[i].EncodeXDRInto(xw)
if err != nil {
return xw.Tot(), err
}
@@ -142,20 +145,20 @@ func (o versionList) encodeXDR(xw *xdr.Writer) (int, error) {
func (o *versionList) DecodeXDR(r io.Reader) error {
xr := xdr.NewReader(r)
return o.decodeXDR(xr)
return o.DecodeXDRFrom(xr)
}
func (o *versionList) UnmarshalXDR(bs []byte) error {
var br = bytes.NewReader(bs)
var xr = xdr.NewReader(br)
return o.decodeXDR(xr)
return o.DecodeXDRFrom(xr)
}
func (o *versionList) decodeXDR(xr *xdr.Reader) error {
func (o *versionList) DecodeXDRFrom(xr *xdr.Reader) error {
_versionsSize := int(xr.ReadUint32())
o.versions = make([]fileVersion, _versionsSize)
for i := range o.versions {
(&o.versions[i]).decodeXDR(xr)
(&o.versions[i]).DecodeXDRFrom(xr)
}
return xr.Error()
}