From fbf90504b837b6e982b6b508e7491a47896ced1b Mon Sep 17 00:00:00 2001
From: Timon Ringwald <timon.ringwald@m2xpert.com>
Date: Thu, 1 Oct 2020 15:54:08 +0200
Subject: [PATCH] fixed panic in Set method

---
 buffer.go | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/buffer.go b/buffer.go
index 6425b0d..6b83501 100644
--- a/buffer.go
+++ b/buffer.go
@@ -30,9 +30,17 @@ func NewBuffer(width, height int) *Buffer {
 	}
 }
 
+func (b *Buffer) x(x int) int {
+	return limit(x, 0, b.width-1)
+}
+
+func (b *Buffer) y(y int) int {
+	return limit(y, 0, b.height-1)
+}
+
 // Set sets the rune at position (x,y) to c
 func (b *Buffer) Set(x, y int, c rune) {
-	b.data[y][x] = c
+	b.data[b.y(y)][b.x(x)] = c
 }
 
 // Get returns the rune at position (x,y)