Add rpmKeyringSize()

Return the number of primary keys in a keyring.

include/rpm/rpmkeyring.h

@@ -37,6 +37,14 @@ rpmKeyring rpmKeyringNew(void);
  */
 rpmKeyring rpmKeyringFree(rpmKeyring keyring);
 
+/** \ingroup rpmkeyring
+ * Get number of primary keys
+ * @param keyring	keyring handle
+ * @param count_subkeys	0 for primary keys only, 1 for all
+ * @return		Number of primary keys in the keyring
+ */
+size_t rpmKeyringSize(rpmKeyring keyring, int count_subkeys);
+
 /** \ingroup rpmkeyring
  * Add a public key to keyring.
  * @param keyring	keyring handle

rpmio/rpmkeyring.cc

@@ -71,6 +71,19 @@ rpmKeyring rpmKeyringFree(rpmKeyring keyring)
     return NULL;
 }
 
+size_t rpmKeyringSize(rpmKeyring keyring, int count_subkeys)
+{
+    if (!keyring) return 0;
+    rdlock lock(keyring->mutex);
+
+    size_t size = 0;
+    for (auto &pair : keyring->keys) {
+	if (count_subkeys or !pair.second->primarykey)
+	    size++;
+    }
+    return size;
+}
+
 rpmKeyringIterator rpmKeyringInitIterator(rpmKeyring keyring, int unused)
 {
     if (!keyring || unused != 0)