From 2c6a5df89dfba9a54f3bb09d145ef13081c76bf1 Mon Sep 17 00:00:00 2001
From: gameblabla <gameblabla@openmailbox.org>
Date: Thu, 18 Jul 2019 02:28:55 +0200
Subject: [PATCH] psxbios: Add checks for strlen.

Per what Nocash documentation says.
---
 libpcsxcore/psxbios.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libpcsxcore/psxbios.c b/libpcsxcore/psxbios.c
index 13cfe733..cd2fb0c5 100644
--- a/libpcsxcore/psxbios.c
+++ b/libpcsxcore/psxbios.c
@@ -666,6 +666,11 @@ void psxBios_strncpy() { // 0x1a
 void psxBios_strlen() { // 0x1b
 	char *p = (char *)Ra0;
 	v0 = 0;
+	if (a0 == 0)
+	{
+		pc0 = ra;
+		return;
+	}
 	while (*p++) v0++;
 	pc0 = ra;
 }
-- 
2.39.2