degesch: factor out buffer_goto()

And make M-[0-9] ding if there's no such buffer.

1 files changed, 16 insertions, 8 deletions

diff --git a/degesch.c b/degesch.c
index db07059..f65292a 100644
--- a/degesch.c
+++ b/degesch.c
@@ -938,6 +938,20 @@ buffer_activate (struct app_context *ctx, struct buffer *buffer)
 	refresh_prompt (ctx);
 }
 
+/// Activate the n-th buffer, counting from one
+static bool
+buffer_goto (struct app_context *ctx, int n)
+{
+	int i = 0;
+	LIST_FOR_EACH (struct buffer, iter, ctx->buffers)
+		if (++i == n)
+		{
+			buffer_activate (ctx, iter);
+			return true;
+		}
+	return false;
+}
+
 static void
 init_buffers (struct app_context *ctx)
 {
@@ -1328,15 +1342,9 @@ on_readline_goto_buffer (int count, int key)
 	if (n == 0)
 		n = 10;
 
-	// Activate the n-th buffer
-	int i = 0;
 	struct app_context *ctx = g_ctx;
-	LIST_FOR_EACH (struct buffer, iter, ctx->buffers)
-		if (++i == n)
-		{
-			buffer_activate (ctx, iter);
-			break;
-		}
+	if (!buffer_goto (ctx, n))
+		rl_ding ();
 	return 0;
 }