ANSI: make it so x position can't be negative

phpseclib · Jul 16, 2017 · 84d1628 · 84d1628 · terrafrost · Aug 24, 2017
1 parent 7606f81
commit 84d1628
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/phpseclib/File/ANSI.php b/phpseclib/File/ANSI.php
@@ -332,6 +332,9 @@ function appendString($source)
                             case preg_match('#\x1B\[(\d+)D#', $this->ansi, $match): // Move cursor left n lines
                                 $this->old_x = $this->x;
                                 $this->x-= $match[1];
+                                if ($this->x < 0) {
+                                    $this->x = 0;
+                                }
                                 break;
                             case preg_match('#\x1B\[(\d+);(\d+)r#', $this->ansi, $match): // Set top and bottom lines of a window
                                 break;