// Decode transform an core.Object into a Blob struct
func (b *Blob) Decode(o core.Object) error {
if o.Type() != core.BlobObject {
return ErrUnsupportedObject
}
b.Hash = o.Hash()
b.Size = o.Size()
b.obj = o
return nil
}
// Decode transform an core.Object into a Tree struct
func (t *Tree) Decode(o core.Object) error {
if o.Type() != core.TreeObject {
return ErrUnsupportedObject
}
t.Hash = o.Hash()
if o.Size() == 0 {
return nil
}
t.Entries = make(map[string]TreeEntry)
r := bufio.NewReader(o.Reader())
for {
mode, err := r.ReadString(' ')
if err != nil {
if err == io.EOF {
break
}
return err
}
fm, err := strconv.ParseInt(mode[:len(mode)-1], 8, 32)
if err != nil && err != io.EOF {
return err
}
name, err := r.ReadString(0)
if err != nil && err != io.EOF {
return err
}
var hash core.Hash
_, err = r.Read(hash[:])
if err != nil && err != io.EOF {
return err
}
baseName := name[:len(name)-1]
t.Entries[baseName] = TreeEntry{
Hash: hash,
Mode: os.FileMode(fm),
Name: baseName,
}
}
return nil
}
// Set stores an object, the object should be properly filled before set it.
func (o *ObjectStorage) Set(obj core.Object) (core.Hash, error) {
h := obj.Hash()
o.Objects[h] = obj
switch obj.Type() {
case core.CommitObject:
o.Commits[h] = o.Objects[h]
case core.TreeObject:
o.Trees[h] = o.Objects[h]
case core.BlobObject:
o.Blobs[h] = o.Objects[h]
default:
return h, ErrUnsupportedObjectType
}
return h, nil
}
// Decode transform an core.Object into a Blob struct
func (c *Commit) Decode(o core.Object) error {
if o.Type() != core.CommitObject {
return ErrUnsupportedObject
}
c.Hash = o.Hash()
r := bufio.NewReader(o.Reader())
var message bool
for {
line, err := r.ReadSlice('\n')
if err != nil && err != io.EOF {
return err
}
line = bytes.TrimSpace(line)
if !message {
if len(line) == 0 {
message = true
continue
}
split := bytes.SplitN(line, []byte{' '}, 2)
switch string(split[0]) {
case "tree":
c.tree = core.NewHash(string(split[1]))
case "parent":
c.parents = append(c.parents, core.NewHash(string(split[1])))
case "author":
c.Author.Decode(split[1])
case "committer":
c.Committer.Decode(split[1])
}
} else {
c.Message += string(line) + "\n"
}
if err == io.EOF {
return nil
}
}
}