From e8df59be59e7e8b7964f96fea645a20e246d6a9f Mon Sep 17 00:00:00 2001
From: Dave Murphy <davem@devkitpro.org>
Date: Sat, 13 Dec 2014 02:32:21 +0000
Subject: [PATCH] check parameters are valid as we parse

---
 libctru/source/console.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/libctru/source/console.c b/libctru/source/console.c
index 081473e..a6e4ce2 100644
--- a/libctru/source/console.c
+++ b/libctru/source/console.c
@@ -207,14 +207,19 @@ ssize_t con_write(struct _reent *r,int fd,const char *ptr, size_t len) {
 
 		if ( chr == 0x1b && *tmp == '[' ) {
 			bool escaping = true;
-			char *escapeseq	= tmp;
-			int escapelen = 0;
+			char *escapeseq	= tmp++;
+			int escapelen = 1;
+			i++; count++;
 
 			do {
 				chr = *(tmp++);
 				i++; count++; escapelen++;
 				int parameter, assigned, consumed;
 
+				// make sure parameters are positive values and delimited by semicolon
+				if((chr >= '0' && chr <= '9') || chr == ';')
+					continue;
+
 				switch (chr) {
 					//---------------------------------------
 					// Cursor directional movement