path: root/builtin/describe.c
diff options
authorStefan Beller <>2017-06-30 19:14:05 (GMT)
committerJunio C Hamano <>2017-06-30 19:49:28 (GMT)
commit7663cdc86c860d5b5293a1dd4b0fb6c4e006d08e (patch)
tree19a347bfc7b3eb59f2f30c581c8408679001d764 /builtin/describe.c
parente0aaa1b6532cfce93d87af9bc813fb2e7a7ce9d7 (diff)
hashmap.h: compare function has access to a data field
When using the hashmap a common need is to have access to caller provided data in the compare function. A couple of times we abuse the keydata field to pass in the data needed. This happens for example in patch-ids.c. This patch changes the function signature of the compare function to have one more void pointer available. The pointer given for each invocation of the compare function must be defined in the init function of the hashmap and is just passed through. Documentation of this new feature is deferred to a later patch. This is a rather mechanical conversion, just adding the new pass-through parameter. However while at it improve the naming of the fields of all compare functions used by hashmaps by ensuring unused parameters are prefixed with 'unused_' and naming the parameters what they are (instead of 'unused' make it 'unused_keydata'). Signed-off-by: Stefan Beller <> Signed-off-by: Junio C Hamano <>
Diffstat (limited to 'builtin/describe.c')
1 files changed, 5 insertions, 3 deletions
diff --git a/builtin/describe.c b/builtin/describe.c
index 70eb144..8868f00 100644
--- a/builtin/describe.c
+++ b/builtin/describe.c
@@ -54,8 +54,10 @@ static const char *prio_names[] = {
N_("head"), N_("lightweight"), N_("annotated"),
-static int commit_name_cmp(const struct commit_name *cn1,
- const struct commit_name *cn2, const void *peeled)
+static int commit_name_cmp(const void *unused_cmp_data,
+ const struct commit_name *cn1,
+ const struct commit_name *cn2,
+ const void *peeled)
return oidcmp(&cn1->peeled, peeled ? peeled : &cn2->peeled);
@@ -501,7 +503,7 @@ int cmd_describe(int argc, const char **argv, const char *prefix)
return cmd_name_rev(args.argc, args.argv, prefix);
- hashmap_init(&names, (hashmap_cmp_fn) commit_name_cmp, 0);
+ hashmap_init(&names, (hashmap_cmp_fn) commit_name_cmp, NULL, 0);
for_each_rawref(get_name, NULL);
if (!names.size && !always)
die(_("No names found, cannot describe anything."));