Add a passthrough mode flag

The simplest change required to handle the bracketed paste mode.

LICENSE

@@ -1,5 +1,5 @@
 Copyright (c) 2007-2014 Paul Evans <leonerd@leonerd.org.uk>
-Copyright (c) 2014-2021 Přemysl Eric Janouch <p@janouch.name>
+Copyright (c) 2014-2026 Přemysl Eric Janouch <p@janouch.name>
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

termo.c

@@ -893,6 +893,21 @@ peekkey (termo_t *tk, termo_key_t *key, int flags, size_t *nbytep)
 		tk->hightide = 0;
 	}
 
+	// A simple way of getting access to raw data, including the buffer.
+	if (tk->flags & TERMO_FLAG_PASSTHROUGH)
+	{
+		if (tk->buffcount == 0)
+			return tk->is_closed ? TERMO_RES_EOF : TERMO_RES_NONE;
+
+		key->type = TERMO_TYPE_KEY;
+		key->modifiers = 0;
+		key->multibyte[0] = key->code.codepoint = CHARAT (0);
+		key->multibyte[1] = 0;
+
+		*nbytep = 1;
+		return TERMO_RES_KEY;
+	}
+
 	termo_result_t ret;
 	termo_driver_node_t *p;
 	for (p = tk->drivers; p; p = p->next)

termo.h

@@ -196,7 +196,9 @@ enum
 	// Return ERROR on signal (EINTR) rather than retry
 	TERMO_FLAG_EINTR       = 1 << 7,
 	// Do not call termkey_start() in constructor
-	TERMO_FLAG_NOSTART     = 1 << 8
+	TERMO_FLAG_NOSTART     = 1 << 8,
+	// Blindly report every individual input byte as TERMO_TYPE_KEY
+	TERMO_FLAG_PASSTHROUGH = 1 << 9
 };
 
 enum