pack: move nth_packed_object_{sha1,oid}

Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

cache.h

@@ -1630,20 +1630,6 @@ extern int odb_pack_keep(const char *name);
  */
 extern void check_pack_index_ptr(const struct packed_git *p, const void *ptr);
 
-/*
- * Return the SHA-1 of the nth object within the specified packfile.
- * Open the index if it is not already open.  The return value points
- * at the SHA-1 within the mmapped index.  Return NULL if there is an
- * error.
- */
-extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t n);
-/*
- * Like nth_packed_object_sha1, but write the data into the object specified by
- * the the first argument.  Returns the first argument on success, and NULL on
- * error.
- */
-extern const struct object_id *nth_packed_object_oid(struct object_id *, struct packed_git *, uint32_t n);
-
 /*
  * Return the offset of the nth object within the specified packfile.
  * The index must already be opened.

packfile.c

@@ -1636,3 +1636,34 @@ out:
 
 	return data;
 }
+
+const unsigned char *nth_packed_object_sha1(struct packed_git *p,
+					    uint32_t n)
+{
+	const unsigned char *index = p->index_data;
+	if (!index) {
+		if (open_pack_index(p))
+			return NULL;
+		index = p->index_data;
+	}
+	if (n >= p->num_objects)
+		return NULL;
+	index += 4 * 256;
+	if (p->index_version == 1) {
+		return index + 24 * n + 4;
+	} else {
+		index += 8;
+		return index + 20 * n;
+	}
+}
+
+const struct object_id *nth_packed_object_oid(struct object_id *oid,
+					      struct packed_git *p,
+					      uint32_t n)
+{
+	const unsigned char *hash = nth_packed_object_sha1(p, n);
+	if (!hash)
+		return NULL;
+	hashcpy(oid->hash, hash);
+	return oid;
+}

packfile.h

@@ -63,6 +63,21 @@ extern void unuse_pack(struct pack_window **);
 extern void clear_delta_base_cache(void);
 extern struct packed_git *add_packed_git(const char *path, size_t path_len, int local);
 
+/*
+ * Return the SHA-1 of the nth object within the specified packfile.
+ * Open the index if it is not already open.  The return value points
+ * at the SHA-1 within the mmapped index.  Return NULL if there is an
+ * error.
+ */
+extern const unsigned char *nth_packed_object_sha1(struct packed_git *, uint32_t n);
+/*
+ * Like nth_packed_object_sha1, but write the data into the object specified by
+ * the the first argument.  Returns the first argument on success, and NULL on
+ * error.
+ */
+extern const struct object_id *nth_packed_object_oid(struct object_id *, struct packed_git *, uint32_t n);
+
+
 extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
 extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
 extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
@@ -79,5 +94,4 @@ extern int packed_object_info(struct packed_git *pack, off_t offset, struct obje
 
 extern void mark_bad_packed_object(struct packed_git *p, const unsigned char *sha1);
 extern const struct packed_git *has_packed_and_bad(const unsigned char *sha1);
-
 #endif

sha1_file.c

@@ -1075,37 +1075,6 @@ int parse_sha1_header(const char *hdr, unsigned long *sizep)
 	return parse_sha1_header_extended(hdr, &oi, 0);
 }
 
-const unsigned char *nth_packed_object_sha1(struct packed_git *p,
-					    uint32_t n)
-{
-	const unsigned char *index = p->index_data;
-	if (!index) {
-		if (open_pack_index(p))
-			return NULL;
-		index = p->index_data;
-	}
-	if (n >= p->num_objects)
-		return NULL;
-	index += 4 * 256;
-	if (p->index_version == 1) {
-		return index + 24 * n + 4;
-	} else {
-		index += 8;
-		return index + 20 * n;
-	}
-}
-
-const struct object_id *nth_packed_object_oid(struct object_id *oid,
-					      struct packed_git *p,
-					      uint32_t n)
-{
-	const unsigned char *hash = nth_packed_object_sha1(p, n);
-	if (!hash)
-		return NULL;
-	hashcpy(oid->hash, hash);
-	return oid;
-}
-
 void check_pack_index_ptr(const struct packed_git *p, const void *vptr)
 {
 	const unsigned char *ptr = vptr;