X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fhashmap.c;h=a59b880dffb25bb587f56714cbc03fb75cd2a7ee;hp=5a993b6e4761a36ba410c1f9b1cbba7a5de95a58;hb=5de6b302196f3a708a0ed36d88abd9e17bbc9d52;hpb=e99e38bbdcca3fe5956823bdb3d38544ccf93221

diff --git a/src/hashmap.c b/src/hashmap.c
index 5a993b6e4..a59b880df 100644
--- a/src/hashmap.c
+++ b/src/hashmap.c
@@ -296,6 +296,33 @@ int hashmap_remove_and_put(Hashmap *h, const void *old_key, const void *new_key,
         return 0;
 }
 
+int hashmap_remove_and_replace(Hashmap *h, const void *old_key, const void *new_key, void *value) {
+        struct hashmap_entry *e, *k;
+        unsigned old_hash, new_hash;
+
+        if (!h)
+                return -ENOENT;
+
+        old_hash = h->hash_func(old_key) % NBUCKETS;
+        if (!(e = hash_scan(h, old_hash, old_key)))
+                return -ENOENT;
+
+        new_hash = h->hash_func(new_key) % NBUCKETS;
+
+        if ((k = hash_scan(h, new_hash, new_key)))
+                if (e != k)
+                        remove_entry(h, k);
+
+        unlink_entry(h, e, old_hash);
+
+        e->key = new_key;
+        e->value = value;
+
+        link_entry(h, e, new_hash);
+
+        return 0;
+}
+
 void* hashmap_remove_value(Hashmap *h, const void *key, void *value) {
         struct hashmap_entry *e;
         unsigned hash;