[PATCH 3/4] Refactoring: move duplicated code from builtin-pack-objects.c and fast-import.c to object.c

[Michael Lukashov <michael.lukashov@gmail.com>]

The following functions are duplicated:

  encode_header

Signed-off-by: Michael Lukashov <michael.lukashov@gmail.com>
---
 builtin-pack-objects.c |   27 ---------------------------
 fast-import.c          |   23 -----------------------
 object.c               |   20 ++++++++++++++++++++
 object.h               |    9 +++++++++
 4 files changed, 29 insertions(+), 50 deletions(-)

diff --git a/builtin-pack-objects.c b/builtin-pack-objects.c
index e1d3adf..80bbcd2 100644
--- a/builtin-pack-objects.c
+++ b/builtin-pack-objects.c
@@ -155,33 +155,6 @@ static unsigned long do_compress(void **pptr, unsigned long size)
 }
 
 /*
- * The per-object header is a pretty dense thing, which is
- *  - first byte: low four bits are "size", then three bits of "type",
- *    and the high bit is "size continues".
- *  - each byte afterwards: low seven bits are size continuation,
- *    with the high bit being "size continues"
- */
-static int encode_header(enum object_type type, unsigned long size, unsigned char *hdr)
-{
-	int n = 1;
-	unsigned char c;
-
-	if (type < OBJ_COMMIT || type > OBJ_REF_DELTA)
-		die("bad type %d", type);
-
-	c = (type << 4) | (size & 15);
-	size >>= 4;
-	while (size) {
-		*hdr++ = c | 0x80;
-		c = size & 0x7f;
-		size >>= 7;
-		n++;
-	}
-	*hdr = c;
-	return n;
-}
-
-/*
  * we are going to reuse the existing object data as is.  make
  * sure it is not corrupt.
  */
diff --git a/fast-import.c b/fast-import.c
index b477dc6..f983338 100644
--- a/fast-import.c
+++ b/fast-import.c
@@ -1013,29 +1013,6 @@ static void cycle_packfile(void)
 	start_packfile();
 }
 
-static size_t encode_header(
-	enum object_type type,
-	uintmax_t size,
-	unsigned char *hdr)
-{
-	int n = 1;
-	unsigned char c;
-
-	if (type < OBJ_COMMIT || type > OBJ_REF_DELTA)
-		die("bad type %d", type);
-
-	c = (type << 4) | (size & 15);
-	size >>= 4;
-	while (size) {
-		*hdr++ = c | 0x80;
-		c = size & 0x7f;
-		size >>= 7;
-		n++;
-	}
-	*hdr = c;
-	return n;
-}
-
 static int store_object(
 	enum object_type type,
 	struct strbuf *dat,
diff --git a/object.c b/object.c
index 3ca92c4..a06ad01 100644
--- a/object.c
+++ b/object.c
@@ -268,3 +268,23 @@ void object_array_remove_duplicates(struct object_array *array)
 		array->nr = dst;
 	}
 }
+
+int encode_header(enum object_type type, uintmax_t size, unsigned char *hdr)
+{
+	int n = 1;
+	unsigned char c;
+
+	if (type < OBJ_COMMIT || type > OBJ_REF_DELTA)
+		die("bad type %d", type);
+
+	c = (type << 4) | (size & 15);
+	size >>= 4;
+	while (size) {
+		*hdr++ = c | 0x80;
+		c = size & 0x7f;
+		size >>= 7;
+		n++;
+	}
+	*hdr = c;
+	return n;
+}
diff --git a/object.h b/object.h
index 82877c8..f5a5c77 100644
--- a/object.h
+++ b/object.h
@@ -79,4 +79,13 @@ void add_object_array(struct object *obj, const char *name, struct object_array
 void add_object_array_with_mode(struct object *obj, const char *name, struct object_array *array, unsigned mode);
 void object_array_remove_duplicates(struct object_array *);
 
+/*
+ * The per-object header is a pretty dense thing, which is
+ *  - first byte: low four bits are "size", then three bits of "type",
+ *    and the high bit is "size continues".
+ *  - each byte afterwards: low seven bits are size continuation,
+ *    with the high bit being "size continues"
+ */
+int encode_header(enum object_type type, uintmax_t size, unsigned char *hdr);
+
 #endif /* OBJECT_H */
-- 
1.7.0.1571.g856c2