diff -r 51df4b5bdba2 -r 14c850aeee79 libpurple/protocols/ircv3/purpleircv3source.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libpurple/protocols/ircv3/purpleircv3source.h	Fri Oct 06 00:35:28 2023 -0500
@@ -0,0 +1,50 @@
+/*
+ * Purple - Internet Messaging Library
+ * Copyright (C) Pidgin Developers <devel@pidgin.im>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses/>.
+ */
+#if !defined(PURPLE_IRCV3_GLOBAL_HEADER_INSIDE) && \
+    !defined(PURPLE_IRCV3_COMPILATION)
+# error "only <libpurple/protocols/ircv3.h> may be included directly"
+#endif
+
+#ifndef PURPLE_IRCV3_SOURCE_H
+#define PURPLE_IRCV3_SOURCE_H
+
+#include <glib.h>
+#include <glib-object.h>
+
+G_BEGIN_DECLS
+
+/**
+ * purple_ircv3_source_parse:
+ * @source: The source to parse.
+ * @nick: (out) (transfer full): A return address for the nick.
+ * @user: (out) (transfer full): A return address for the user.
+ * @host: (out) (transfer full): A return address for the host.
+ *
+ * Parses a `source` string like `pidgy!~u@53unc8n42i868.irc` into its nick,
+ * user, and host parts per https://modern.ircdocs.horse/#source.
+ *
+ * If the user or host aren't present in @source, but a return address is
+ * provided for them, that pointer will be set to %NULL.
+ *
+ * Since: 3.0.0
+ */
+void purple_ircv3_source_parse(const char *source, char **nick, char **user, char **host);
+
+G_END_DECLS
+
+#endif /* PURPLE_IRCV3_SOURCE_H */