1 files changed, 46 insertions, 0 deletions
diff --git a/src/imap/imap-feature.c b/src/imap/imap-feature.c
new file mode 100644
index 0000000..d8d52b8
--- /dev/null
+++ b/src/imap/imap-feature.c
@@ -0,0 +1,46 @@
+/* Copyright (c) 2018 Dovecot authors, see the included COPYING file */
+
+#include "imap-common.h"
+#include "imap-feature.h"
+
+static ARRAY_TYPE(imap_feature) feature_register = ARRAY_INIT;
+
+bool imap_feature_lookup(const char *name, unsigned int *feature_idx_r)
+{
+	for (unsigned int idx = 0; idx < array_count(&feature_register); idx++) {
+		const struct imap_feature *feat =
+			array_idx(&feature_register, idx);
+		if (strcasecmp(name, feat->feature) == 0) {
+			*feature_idx_r = idx;
+			return TRUE;
+		}
+	}
+	return FALSE;
+}
+
+const struct imap_feature *imap_feature_idx(unsigned int feature_idx)
+{
+	return array_idx(&feature_register, feature_idx);
+}
+
+unsigned int
+imap_feature_register(const char *feature, enum mailbox_feature mailbox_features,
+		      imap_client_enable_callback_t *callback)
+{
+	struct imap_feature *feat = array_append_space(&feature_register);
+	feat->feature = feature;
+	feat->mailbox_features = mailbox_features;
+	feat->callback = callback;
+	return array_count(&feature_register)-1;
+}
+
+void imap_features_init(void)
+{
+	i_assert(!array_is_created(&feature_register));
+	i_array_init(&feature_register, 8);
+}
+
+void imap_features_deinit(void)
+{
+	array_free(&feature_register);
+}