From 62d363f044dbcd5dbdf447a0f3ce4c12b8ab30e4 Mon Sep 17 00:00:00 2001
From: Runxi Yu
Date: Sat, 16 May 2026 08:29:46 +0000
Subject: object/header: Refactor

---
 REFACTOR                |  1 -
 object/header/append.go | 23 +++++++++--------------
 object/header/encode.go |  8 --------
 object/header/parse.go  | 25 ++++++++++++++-----------
 4 files changed, 23 insertions(+), 34 deletions(-)
 delete mode 100644 object/header/encode.go

diff --git a/REFACTOR b/REFACTOR
index d72d6124..55ecd95f 100644
--- a/REFACTOR
+++ b/REFACTOR
@@ -47,7 +47,6 @@ object
 object/blob
 object/commit
 object/fetch
-object/header
 object/signature
 object/signed
 object/signed/commit
diff --git a/object/header/append.go b/object/header/append.go
index d1e98672..d79016a0 100644
--- a/object/header/append.go
+++ b/object/header/append.go
@@ -1,25 +1,20 @@
 package header
 
 import (
+	"slices"
 	"strconv"
 
 	"codeberg.org/lindenii/furgit/object/typ"
 )
 
 // AppendHeader appends a canonical loose-object header ("type size\x00") to dst.
-func AppendHeader(dst []byte, ty typ.Type, size uint64) ([]byte, bool) {
-	tyName, ok := ty.Name()
-	if !ok {
-		return nil, false
-	}
+func AppendHeader(dst []byte, ty typ.Type, size uint64) ([]byte) {
+	tyName := ty.Name()
 
-	sizeStr := strconv.FormatInt(size, 10)
-	out := make([]byte, 0, len(dst)+len(tyName)+len(sizeStr)+2)
-	out = append(out, dst...)
-	out = append(out, tyName...)
-	out = append(out, ' ')
-	out = append(out, sizeStr...)
-	out = append(out, 0)
-
-	return out, true
+	dst = slices.Grow(dst, len(tyName)+1+19+1)
+	dst = append(dst, tyName...)
+	dst = append(dst, ' ')
+	dst = strconv.AppendUint(dst, size, 10)
+	dst = append(dst, 0)
+	return dst
 }
diff --git a/object/header/encode.go b/object/header/encode.go
deleted file mode 100644
index 4cd8599c..00000000
--- a/object/header/encode.go
+++ /dev/null
@@ -1,8 +0,0 @@
-package header
-
-import "codeberg.org/lindenii/furgit/object/typ"
-
-// Encode returns a canonical loose-object header ("type size\x00").
-func Encode(ty typ.Type, size int64) ([]byte, bool) {
-	return Append(nil, ty, size)
-}
diff --git a/object/header/parse.go b/object/header/parse.go
index 77deef38..7fb3ed04 100644
--- a/object/header/parse.go
+++ b/object/header/parse.go
@@ -2,39 +2,42 @@ package header
 
 import (
 	"bytes"
+	"errors"
 	"strconv"
 
 	"codeberg.org/lindenii/furgit/object/typ"
 )
 
+var ErrInvalidHeader = errors.New("object/header: invalid header")
+
 // Parse parses a canonical loose-object header ("type size\x00").
-func Parse(data []byte) (ty typ.Type, size int64, consumed int, ok bool) {
+func Parse(data []byte) (ty typ.Type, size uint64, consumed int, err error) {
 	space := bytes.IndexByte(data, ' ')
 	if space <= 0 {
-		return typ.TypeInvalid, 0, 0, false
+		return 0, 0, 0, ErrInvalidHeader
 	}
 
 	nulRel := bytes.IndexByte(data[space+1:], 0)
 	if nulRel < 0 {
-		return typ.TypeInvalid, 0, 0, false
+		return 0, 0, 0, ErrInvalidHeader
 	}
 
 	nul := space + 1 + nulRel
 
-	ty, ok = typ.Parse(string(data[:space]))
-	if !ok {
-		return typ.TypeInvalid, 0, 0, false
+	ty, err = typ.Parse(string(data[:space]))
+	if err != nil {
+		return 0, 0, 0, ErrInvalidHeader
 	}
 
 	sizeBytes := data[space+1 : nul]
 	if len(sizeBytes) == 0 {
-		return typ.TypeInvalid, 0, 0, false
+		return 0, 0, 0, ErrInvalidHeader
 	}
 
-	size, err := strconv.ParseInt(string(sizeBytes), 10, 64)
-	if err != nil || size < 0 {
-		return typ.TypeInvalid, 0, 0, false
+	size, err = strconv.ParseUint(string(sizeBytes), 10, 64)
+	if err != nil {
+		return 0, 0, 0, ErrInvalidHeader
 	}
 
-	return ty, size, nul + 1, true
+	return ty, size, nul + 1, nil
 }
-- 
cgit v1.3.1-10-gc9f91