--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/lib-imap-storage/imap-metadata.h	Sat Nov 15 02:27:27 2014 +0200
@@ -0,0 +1,57 @@
+#ifndef IMAP_METADATA_H
+#define IMAP_METADATA_H
+
+#define IMAP_METADATA_PRIVATE_PREFIX "/private"
+#define IMAP_METADATA_SHARED_PREFIX "/shared"
+
+struct imap_metadata_iter;
+struct imap_metadata_transaction;
+
+/* Checks whether IMAP metadata entry name is valid */
+bool imap_metadata_verify_entry_name(
+	const char *name, const char **error_r);
+
+/* Set IMAP metadata entry to value. */
+int imap_metadata_set(struct imap_metadata_transaction *imtrans,
+	const char *entry, const struct mail_attribute_value *value);
+/* Delete IMAP metadata entry. This is just a wrapper to
+   imap_metadata_set() with value->value=NULL. */
+int imap_metadata_unset(struct imap_metadata_transaction *imtrans,
+	const char *entry);
+/* Returns value for IMAP metadata entry. Returns 1 if value was returned,
+   0 if value wasn't found (set to NULL), -1 if error */
+int imap_metadata_get(struct imap_metadata_transaction *imtrans,
+	const char *entry, struct mail_attribute_value *value_r);
+/* Same as imap_metadata_get(), but the returned value may be either an
+   input stream or a string. */
+int imap_metadata_get_stream(struct imap_metadata_transaction *imtrans,
+	const char *entry, struct mail_attribute_value *value_r);
+
+/* Iterate through IMAP metadata entries names under the specified entry. */
+struct imap_metadata_iter *
+imap_metadata_iter_init(struct imap_metadata_transaction *imtrans,
+	const char *entry);
+/* Returns the next IMAP metadata entry name or NULL if there are no more
+   entries. */
+const char *imap_metadata_iter_next(struct imap_metadata_iter *iter);
+int imap_metadata_iter_deinit(struct imap_metadata_iter **_iter);
+
+struct imap_metadata_transaction *
+imap_metadata_transaction_begin(struct mailbox *box);
+struct imap_metadata_transaction *
+imap_metadata_transaction_begin_mailbox(struct mail_user *user,
+					const char *mailbox);
+struct imap_metadata_transaction *
+imap_metadata_transaction_begin_server(struct mail_user *user);
+
+int imap_metadata_transaction_commit(
+	struct imap_metadata_transaction **_imtrans,
+	enum mail_error *error_code_r, const char **error_r);
+void imap_metadata_transaction_rollback(
+	struct imap_metadata_transaction **_imtrans);
+const char *
+imap_metadata_transaction_get_last_error(
+	struct imap_metadata_transaction *imtrans,
+	enum mail_error *error_code_r);
+
+#endif