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authorMiguel Molina <miguel@erizocosmi.co>2018-07-26 14:10:19 +0200
committerGitHub <noreply@github.com>2018-07-26 14:10:19 +0200
commita8ff3e599b3ee998a8b8626cd9fe9fa68490d354 (patch)
treeac984b72e7c54160b0b154bffd4474f96ae5028e /plumbing/format/idxfile/encoder.go
parent9f00789688d26191a987fdec8bc2678362ec4453 (diff)
parent009f1069a1248c1e9189a9e4c342f6d017156ec4 (diff)
downloadgo-git-a8ff3e599b3ee998a8b8626cd9fe9fa68490d354.tar.gz
Merge pull request #896 from erizocosmico/feature/new-index-decoder
plumbing/format/idxfile: add new Index and MemoryIndex
Diffstat (limited to 'plumbing/format/idxfile/encoder.go')
-rw-r--r--plumbing/format/idxfile/encoder.go101
1 files changed, 48 insertions, 53 deletions
diff --git a/plumbing/format/idxfile/encoder.go b/plumbing/format/idxfile/encoder.go
index 40abfb8..55df466 100644
--- a/plumbing/format/idxfile/encoder.go
+++ b/plumbing/format/idxfile/encoder.go
@@ -4,12 +4,11 @@ import (
"crypto/sha1"
"hash"
"io"
- "sort"
"gopkg.in/src-d/go-git.v4/utils/binary"
)
-// Encoder writes Idxfile structs to an output stream.
+// Encoder writes MemoryIndex structs to an output stream.
type Encoder struct {
io.Writer
hash hash.Hash
@@ -22,11 +21,9 @@ func NewEncoder(w io.Writer) *Encoder {
return &Encoder{mw, h}
}
-// Encode encodes an Idxfile to the encoder writer.
-func (e *Encoder) Encode(idx *Idxfile) (int, error) {
- idx.Entries.Sort()
-
- flow := []func(*Idxfile) (int, error){
+// Encode encodes an MemoryIndex to the encoder writer.
+func (e *Encoder) Encode(idx *MemoryIndex) (int, error) {
+ flow := []func(*MemoryIndex) (int, error){
e.encodeHeader,
e.encodeFanout,
e.encodeHashes,
@@ -48,7 +45,7 @@ func (e *Encoder) Encode(idx *Idxfile) (int, error) {
return sz, nil
}
-func (e *Encoder) encodeHeader(idx *Idxfile) (int, error) {
+func (e *Encoder) encodeHeader(idx *MemoryIndex) (int, error) {
c, err := e.Write(idxHeader)
if err != nil {
return c, err
@@ -57,75 +54,81 @@ func (e *Encoder) encodeHeader(idx *Idxfile) (int, error) {
return c + 4, binary.WriteUint32(e, idx.Version)
}
-func (e *Encoder) encodeFanout(idx *Idxfile) (int, error) {
- fanout := idx.calculateFanout()
- for _, c := range fanout {
+func (e *Encoder) encodeFanout(idx *MemoryIndex) (int, error) {
+ for _, c := range idx.Fanout {
if err := binary.WriteUint32(e, c); err != nil {
return 0, err
}
}
- return 1024, nil
+ return fanout * 4, nil
}
-func (e *Encoder) encodeHashes(idx *Idxfile) (int, error) {
- sz := 0
- for _, ent := range idx.Entries {
- i, err := e.Write(ent.Hash[:])
- sz += i
+func (e *Encoder) encodeHashes(idx *MemoryIndex) (int, error) {
+ var size int
+ for k := 0; k < fanout; k++ {
+ pos := idx.FanoutMapping[k]
+ if pos == noMapping {
+ continue
+ }
+ n, err := e.Write(idx.Names[pos])
if err != nil {
- return sz, err
+ return size, err
}
+ size += n
}
-
- return sz, nil
+ return size, nil
}
-func (e *Encoder) encodeCRC32(idx *Idxfile) (int, error) {
- sz := 0
- for _, ent := range idx.Entries {
- err := binary.Write(e, ent.CRC32)
- sz += 4
+func (e *Encoder) encodeCRC32(idx *MemoryIndex) (int, error) {
+ var size int
+ for k := 0; k < fanout; k++ {
+ pos := idx.FanoutMapping[k]
+ if pos == noMapping {
+ continue
+ }
+ n, err := e.Write(idx.Crc32[pos])
if err != nil {
- return sz, err
+ return size, err
}
+
+ size += n
}
- return sz, nil
+ return size, nil
}
-func (e *Encoder) encodeOffsets(idx *Idxfile) (int, error) {
- sz := 0
-
- var o64bits []uint64
- for _, ent := range idx.Entries {
- o := ent.Offset
- if o > offsetLimit {
- o64bits = append(o64bits, o)
- o = offsetLimit + uint64(len(o64bits))
+func (e *Encoder) encodeOffsets(idx *MemoryIndex) (int, error) {
+ var size int
+ for k := 0; k < fanout; k++ {
+ pos := idx.FanoutMapping[k]
+ if pos == noMapping {
+ continue
}
- if err := binary.WriteUint32(e, uint32(o)); err != nil {
- return sz, err
+ n, err := e.Write(idx.Offset32[pos])
+ if err != nil {
+ return size, err
}
- sz += 4
+ size += n
}
- for _, o := range o64bits {
- if err := binary.WriteUint64(e, o); err != nil {
- return sz, err
+ if len(idx.Offset64) > 0 {
+ n, err := e.Write(idx.Offset64)
+ if err != nil {
+ return size, err
}
- sz += 8
+ size += n
}
- return sz, nil
+ return size, nil
}
-func (e *Encoder) encodeChecksums(idx *Idxfile) (int, error) {
+func (e *Encoder) encodeChecksums(idx *MemoryIndex) (int, error) {
if _, err := e.Write(idx.PackfileChecksum[:]); err != nil {
return 0, err
}
@@ -137,11 +140,3 @@ func (e *Encoder) encodeChecksums(idx *Idxfile) (int, error) {
return 40, nil
}
-
-// EntryList implements sort.Interface allowing sorting in increasing order.
-type EntryList []*Entry
-
-func (p EntryList) Len() int { return len(p) }
-func (p EntryList) Less(i, j int) bool { return p[i].Hash.String() < p[j].Hash.String() }
-func (p EntryList) Swap(i, j int) { p[i], p[j] = p[j], p[i] }
-func (p EntryList) Sort() { sort.Sort(p) }