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-rw-r--r--builtin/name-rev.c59
1 files changed, 58 insertions, 1 deletions
diff --git a/builtin/name-rev.c b/builtin/name-rev.c
index 1234ebb..29a6f56 100644
--- a/builtin/name-rev.c
+++ b/builtin/name-rev.c
@@ -4,6 +4,7 @@
#include "tag.h"
#include "refs.h"
#include "parse-options.h"
+#include "sha1-lookup.h"
#define CUTOFF_DATE_SLOP 86400 /* one day */
@@ -113,6 +114,34 @@ struct name_ref_data {
const char *ref_filter;
};
+static struct tip_table {
+ struct tip_table_entry {
+ unsigned char sha1[20];
+ const char *refname;
+ } *table;
+ int nr;
+ int alloc;
+ int sorted;
+} tip_table;
+
+static void add_to_tip_table(const unsigned char *sha1, const char *refname,
+ int shorten_unambiguous)
+{
+ refname = name_ref_abbrev(refname, shorten_unambiguous);
+
+ ALLOC_GROW(tip_table.table, tip_table.nr + 1, tip_table.alloc);
+ hashcpy(tip_table.table[tip_table.nr].sha1, sha1);
+ tip_table.table[tip_table.nr].refname = xstrdup(refname);
+ tip_table.nr++;
+ tip_table.sorted = 0;
+}
+
+static int tipcmp(const void *a_, const void *b_)
+{
+ const struct tip_table_entry *a = a_, *b = b_;
+ return hashcmp(a->sha1, b->sha1);
+}
+
static int name_ref(const char *path, const unsigned char *sha1, int flags, void *cb_data)
{
struct object *o = parse_object(sha1);
@@ -135,6 +164,8 @@ static int name_ref(const char *path, const unsigned char *sha1, int flags, void
}
}
+ add_to_tip_table(sha1, path, can_abbreviate_output);
+
while (o && o->type == OBJ_TAG) {
struct tag *t = (struct tag *) o;
if (!t->tagged)
@@ -151,6 +182,32 @@ static int name_ref(const char *path, const unsigned char *sha1, int flags, void
return 0;
}
+static const unsigned char *nth_tip_table_ent(size_t ix, void *table_)
+{
+ struct tip_table_entry *table = table_;
+ return table[ix].sha1;
+}
+
+static const char *get_exact_ref_match(const struct object *o)
+{
+ int found;
+
+ if (!tip_table.table || !tip_table.nr)
+ return NULL;
+
+ if (!tip_table.sorted) {
+ qsort(tip_table.table, tip_table.nr, sizeof(*tip_table.table),
+ tipcmp);
+ tip_table.sorted = 1;
+ }
+
+ found = sha1_pos(o->sha1, tip_table.table, tip_table.nr,
+ nth_tip_table_ent);
+ if (0 <= found)
+ return tip_table.table[found].refname;
+ return NULL;
+}
+
/* returns a static buffer */
static const char *get_rev_name(const struct object *o)
{
@@ -159,7 +216,7 @@ static const char *get_rev_name(const struct object *o)
struct commit *c;
if (o->type != OBJ_COMMIT)
- return NULL;
+ return get_exact_ref_match(o);
c = (struct commit *) o;
n = c->util;
if (!n)