klish: Unfinished display help

bin/klish/interactive.c

@@ -300,6 +300,41 @@ bool_t completion_ack_cb(ktp_session_t *ktp, const faux_msg_t *msg, void *udata)
 }
 
 
+static void display_help(const tinyrl_t *tinyrl, faux_list_t *completions,
+	const char *prefix, size_t max)
+{
+	size_t width = tinyrl_width(tinyrl);
+	size_t cols = 0;
+	faux_list_node_t *iter = NULL;
+	faux_list_node_t *node = NULL;
+	size_t prefix_len = 0;
+	size_t cols_filled = 0;
+
+	if (prefix)
+		prefix_len = strlen(prefix);
+
+	// Find out column and rows number
+	if (max < width)
+		cols = (width + 1) / (prefix_len + max + 1); // For a space between words
+	else
+		cols = 1;
+
+	iter = faux_list_head(completions);
+	while ((node = faux_list_each_node(&iter))) {
+		char *compl = (char *)faux_list_data(node);
+		tinyrl_printf(tinyrl, "%*s%s",
+			(prefix_len + max + 1 - strlen(compl)),
+			prefix ? prefix : "",
+			compl);
+		cols_filled++;
+		if ((cols_filled >= cols) || (node == faux_list_tail(completions))) {
+			cols_filled = 0;
+			tinyrl_crlf(tinyrl);
+		}
+	}
+}
+
+
 bool_t help_ack_cb(ktp_session_t *ktp, const faux_msg_t *msg, void *udata)
 {
 	ctx_t *ctx = (ctx_t *)udata;