builtin/submodule--helper: factor out submodule updating

diff --git a/oidmap.c b/oidmap.c
index 6db4fffcdb272d2227c8a7779a19597dc6102971..d9fb19ba6a354e376780fa0a3624642532a2f6cf 100644 (file)
--- a/oidmap.c
+++ b/oidmap.c
@@ -33,12 +33,19 @@ void oidmap_free(struct oidmap *map, int free_entries)
 
 void *oidmap_get(const struct oidmap *map, const struct object_id *key)
 {
+       if (!map->map.cmpfn)
+               return NULL;
+
        return hashmap_get_from_hash(&map->map, hash(key), key);
 }
 
 void *oidmap_remove(struct oidmap *map, const struct object_id *key)
 {
        struct hashmap_entry entry;
+
+       if (!map->map.cmpfn)
+               oidmap_init(map, 0);
+
        hashmap_entry_init(&entry, hash(key));
        return hashmap_remove(&map->map, &entry, key);
 }
@@ -46,6 +53,10 @@ void *oidmap_remove(struct oidmap *map, const struct object_id *key)
 void *oidmap_put(struct oidmap *map, void *entry)
 {
        struct oidmap_entry *to_put = entry;
+
+       if (!map->map.cmpfn)
+               oidmap_init(map, 0);
+
        hashmap_entry_init(&to_put->internal_entry, hash(&to_put->oid));
        return hashmap_put(&map->map, to_put);
 }