format/commitgraph: Split into ./read and ./ v0.1.60

1 files changed, 0 insertions, 85 deletions

diff --git a/format/commitgraph/commitat.go b/format/commitgraph/commitat.go
deleted file mode 100644
index 4d5853b1..00000000
--- a/format/commitgraph/commitat.go
+++ /dev/null
@@ -1,85 +0,0 @@
-package commitgraph
-
-import (
-	"encoding/binary"
-
-	"codeberg.org/lindenii/furgit/internal/intconv"
-	"codeberg.org/lindenii/furgit/objectid"
-)
-
-// CommitAt returns decoded commit-graph metadata at one position.
-func (reader *Reader) CommitAt(pos Position) (Commit, error) {
-	layer, err := reader.layerByPosition(pos)
-	if err != nil {
-		return Commit{}, err
-	}
-
-	hashSize := reader.algo.Size()
-	stride := hashSize + 16
-
-	strideU64, err := intconv.IntToUint64(stride)
-	if err != nil {
-		return Commit{}, err
-	}
-
-	start64 := uint64(pos.Index) * strideU64
-	end64 := start64 + strideU64
-
-	start, err := intconv.Uint64ToInt(start64)
-	if err != nil {
-		return Commit{}, err
-	}
-
-	end, err := intconv.Uint64ToInt(end64)
-	if err != nil {
-		return Commit{}, err
-	}
-
-	record := layer.chunkCommit[start:end]
-
-	treeOID, err := objectid.FromBytes(reader.algo, record[:hashSize])
-	if err != nil {
-		return Commit{}, err
-	}
-
-	oid, err := reader.OIDAt(pos)
-	if err != nil {
-		return Commit{}, err
-	}
-
-	p1 := binary.BigEndian.Uint32(record[hashSize : hashSize+4])
-	p2 := binary.BigEndian.Uint32(record[hashSize+4 : hashSize+8])
-	genAndTimeHi := binary.BigEndian.Uint32(record[hashSize+8 : hashSize+12])
-	timeLow := binary.BigEndian.Uint32(record[hashSize+12 : hashSize+16])
-
-	timeHigh := uint64(genAndTimeHi & 0x3)
-	commitTimeU64 := (timeHigh << 32) | uint64(timeLow)
-
-	commitTime, err := intconv.Uint64ToInt64(commitTimeU64)
-	if err != nil {
-		return Commit{}, err
-	}
-
-	generationV1 := genAndTimeHi >> 2
-
-	generationV2, err := reader.readGenerationV2(layer, pos.Index, commitTimeU64)
-	if err != nil {
-		return Commit{}, err
-	}
-
-	parent1, parent2, extra, err := reader.decodeParents(layer, p1, p2)
-	if err != nil {
-		return Commit{}, err
-	}
-
-	return Commit{
-		OID:            oid,
-		TreeOID:        treeOID,
-		Parent1:        parent1,
-		Parent2:        parent2,
-		ExtraParents:   extra,
-		CommitTimeUnix: commitTime,
-		GenerationV1:   generationV1,
-		GenerationV2:   generationV2,
-	}, nil
-}