pack-objects: factor out name_hash

As the pack-objects system grows beyond the single
pack-objects.c file, more parts (like the soon-to-exist
bitmap code) will need to compute hashes for matching
deltas. Factor out name_hash to make it available to other
files.

Signed-off-by: Vicent Marti <tanoku@gmail.com>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/pack-objects.c b/builtin/pack-objects.c
index f3f0cf95a8563bf25658087867ce8ff9ae89fd14..faf746b2a7fdc8d1bdeda79d349ae68674f3bd9b 100644 (file)
--- a/builtin/pack-objects.c
+++ b/builtin/pack-objects.c
@@ -778,26 +778,6 @@ static void write_pack_file(void)
                        written, nr_result);
 }
 
-static uint32_t name_hash(const char *name)
-{
-       uint32_t c, hash = 0;
-
-       if (!name)
-               return 0;
-
-       /*
-        * This effectively just creates a sortable number from the
-        * last sixteen non-whitespace characters. Last characters
-        * count "most", so things that end in ".c" sort together.
-        */
-       while ((c = *name++) != 0) {
-               if (isspace(c))
-                       continue;
-               hash = (hash >> 2) + (c << 24);
-       }
-       return hash;
-}
-
 static void setup_delta_attr_check(struct git_attr_check *check)
 {
        static struct git_attr *attr_delta;
@@ -826,7 +806,7 @@ static int add_object_entry(const unsigned char *sha1, enum object_type type,
        struct object_entry *entry;
        struct packed_git *p, *found_pack = NULL;
        off_t found_offset = 0;
-       uint32_t hash = name_hash(name);
+       uint32_t hash = pack_name_hash(name);
        uint32_t index_pos;
 
        entry = packlist_find(&to_pack, sha1, &index_pos);
@@ -1082,7 +1062,7 @@ static void add_preferred_base_object(const char *name)
 {
        struct pbase_tree *it;
        int cmplen;
-       unsigned hash = name_hash(name);
+       unsigned hash = pack_name_hash(name);
 
        if (!num_preferred_base || check_pbase_path(hash))
                return;

diff --git a/pack-objects.h b/pack-objects.h
index f5282155f2e6136e6270be2b0451f9a8e57a1464..90ad0a8f4f8cc68f5594e388055cd3949a936a9a 100644 (file)
--- a/pack-objects.h
+++ b/pack-objects.h
@@ -44,4 +44,24 @@ struct object_entry *packlist_find(struct packing_data *pdata,
                                   const unsigned char *sha1,
                                   uint32_t *index_pos);
 
+static inline uint32_t pack_name_hash(const char *name)
+{
+       uint32_t c, hash = 0;
+
+       if (!name)
+               return 0;
+
+       /*
+        * This effectively just creates a sortable number from the
+        * last sixteen non-whitespace characters. Last characters
+        * count "most", so things that end in ".c" sort together.
+        */
+       while ((c = *name++) != 0) {
+               if (isspace(c))
+                       continue;
+               hash = (hash >> 2) + (c << 24);
+       }
+       return hash;
+}
+
 #endif