1 files changed, 37 insertions, 0 deletions
diff --git a/src/lib-storage/mail-thread.c b/src/lib-storage/mail-thread.c
new file mode 100644
index 0000000..9426d68
--- /dev/null
+++ b/src/lib-storage/mail-thread.c
@@ -0,0 +1,37 @@
+/* Copyright (c) 2009-2018 Dovecot authors, see the included COPYING file */
+
+#include "lib.h"
+#include "mail-thread.h"
+
+struct {
+	const char *name;
+	enum mail_thread_type type;
+} mail_thread_type_strings[] = {
+	{ "REFERENCES", MAIL_THREAD_REFERENCES },
+	{ "REFS", MAIL_THREAD_REFS },
+	{ "ORDEREDSUBJECT", MAIL_THREAD_ORDEREDSUBJECT }
+};
+
+bool mail_thread_type_parse(const char *str, enum mail_thread_type *type_r)
+{
+	unsigned int i;
+
+	for (i = 0; i < N_ELEMENTS(mail_thread_type_strings); i++) {
+		if (strcasecmp(str, mail_thread_type_strings[i].name) == 0) {
+			*type_r = mail_thread_type_strings[i].type;
+			return TRUE;
+		}
+	}
+	return FALSE;
+}
+
+const char *mail_thread_type_to_str(enum mail_thread_type type)
+{
+	unsigned int i;
+
+	for (i = 0; i < N_ELEMENTS(mail_thread_type_strings); i++) {
+		if (mail_thread_type_strings[i].type == type)
+			return mail_thread_type_strings[i].name;
+	}
+	i_panic("Unknown mail_thread_type %d", type);
+}