refactor duplicated encode_header in pack-objects and fast-import

diff --git a/cache.h b/cache.h
index 5abcb09fcfe8d30f87e90f390b923fc07ec8e6e3..2654b608ba8226bcaaae6c2afe9a30fb98fd79de 100644 (file)
--- a/cache.h
+++ b/cache.h
@@ -182,6 +182,8 @@ struct cache_entry {
 /* Only remove in work directory, not index */
 #define CE_WT_REMOVE (0x400000)
 
+#define CE_UNPACKED  (0x1000000)
+
 /*
  * Extended on-disk flags
  */
@@ -553,6 +555,7 @@ enum branch_track {
        BRANCH_TRACK_REMOTE,
        BRANCH_TRACK_ALWAYS,
        BRANCH_TRACK_EXPLICIT,
+       BRANCH_TRACK_OVERRIDE,
 };
 
 enum rebase_setup_type {
@@ -759,7 +762,8 @@ const char *show_date_relative(unsigned long time, int tz,
                               size_t timebuf_size);
 int parse_date(const char *date, char *buf, int bufsize);
 void datestamp(char *buf, int bufsize);
-unsigned long approxidate(const char *);
+#define approxidate(s) approxidate_careful((s), NULL)
+unsigned long approxidate_careful(const char *, int *);
 unsigned long approxidate_relative(const char *date, const struct timeval *now);
 enum date_mode parse_date_format(const char *format);
 
@@ -907,6 +911,14 @@ extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsign
 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);
 extern const char *packed_object_info_detail(struct packed_git *, off_t, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
+/*
+ * 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_in_pack_object_header(enum object_type type, uintmax_t size, unsigned char *hdr);
 
 /* Dumb servers support */
 extern int update_server_info(int);
@@ -1007,6 +1019,7 @@ extern int diff_auto_refresh_index;
 
 /* match-trees.c */
 void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);
+void shift_tree_by(const unsigned char *, const unsigned char *, unsigned char *, const char *);
 
 /*
  * whitespace rules.