From c62c5544fa23378843a3383a9dcd4494e5ea33bc Mon Sep 17 00:00:00 2001
From: Runxi Yu
Date: Fri, 6 Mar 2026 11:54:21 +0800
Subject: format/commitgraph: Split into ./read and ./

---
 format/commitgraph/layer_lookup.go | 53 --------------------------------------
 1 file changed, 53 deletions(-)
 delete mode 100644 format/commitgraph/layer_lookup.go

(limited to 'format/commitgraph/layer_lookup.go')

diff --git a/format/commitgraph/layer_lookup.go b/format/commitgraph/layer_lookup.go
deleted file mode 100644
index 3ae4ff53..00000000
--- a/format/commitgraph/layer_lookup.go
+++ /dev/null
@@ -1,53 +0,0 @@
-package commitgraph
-
-import (
-	"bytes"
-	"encoding/binary"
-
-	"codeberg.org/lindenii/furgit/internal/intconv"
-	"codeberg.org/lindenii/furgit/objectid"
-)
-
-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
-}
-- 
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