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authorGravatar Runxi Yu2026-03-26 09:17:14 +0000
committerGravatar Runxi Yu2026-03-26 09:18:30 +0000
commit3e884f5f3d42cbc4874a04da31dde10314b0cfad (patch)
treef5e1e325fd1a2a0801791c054010213214475d80 /commitgraph/read/layer_lookup.go
parentnetwork/receivepack: Rename from receivepack (diff)
signatureNo signature
format: Move commitgraph and packfile here
Diffstat (limited to 'commitgraph/read/layer_lookup.go')
-rw-r--r--commitgraph/read/layer_lookup.go53
1 files changed, 0 insertions, 53 deletions
diff --git a/commitgraph/read/layer_lookup.go b/commitgraph/read/layer_lookup.go
deleted file mode 100644
index 84095788..00000000
--- a/commitgraph/read/layer_lookup.go
+++ /dev/null
@@ -1,53 +0,0 @@
-package read
-
-import (
- "bytes"
- "encoding/binary"
-
- "codeberg.org/lindenii/furgit/internal/intconv"
- objectid "codeberg.org/lindenii/furgit/object/id"
-)
-
-func layerLookup(layer *layer, oid objectid.ObjectID) (uint32, bool) {
- hashSize := oid.Size()
- first := int(oid.RawBytes()[0])
-
- var lo uint32
- if first > 0 {
- lo = binary.BigEndian.Uint32(layer.chunkOIDFanout[(first-1)*4 : first*4])
- }
-
- hi := binary.BigEndian.Uint32(layer.chunkOIDFanout[first*4 : (first+1)*4])
- if hi == 0 || lo >= hi {
- return 0, false
- }
-
- target := oid.RawBytes()
- left := int(lo)
-
- right := int(hi) - 1
- for left <= right {
- mid := left + (right-left)/2
- start := mid * hashSize
- end := start + hashSize
-
- current := layer.chunkOIDLookup[start:end]
-
- cmp := bytes.Compare(current, target)
- switch {
- case cmp == 0:
- pos, err := intconv.IntToUint32(mid)
- if err != nil {
- return 0, false
- }
-
- return pos, true
- case cmp < 0:
- left = mid + 1
- default:
- right = mid - 1
- }
- }
-
- return 0, false
-}