From: gameblabla <gameblabla@openmailbox.org>
Date: Thu, 18 Jul 2019 00:28:22 +0000 (+0200)
Subject: psxbios: Add checks for strcpy & strncpy.
X-Git-Tag: r23~156^2~23
X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?p=pcsx_rearmed.git;a=commitdiff_plain;h=c3d791f109093fb502a6674c13bd1196d94bca14

psxbios: Add checks for strcpy & strncpy.

This should be closer to documentation.
---

diff --git a/libpcsxcore/psxbios.c b/libpcsxcore/psxbios.c
index be3abb8c..13cfe733 100644
--- a/libpcsxcore/psxbios.c
+++ b/libpcsxcore/psxbios.c
@@ -630,6 +630,12 @@ void psxBios_strncmp() { // 0x18
 
 void psxBios_strcpy() { // 0x19
 	char *p1 = (char *)Ra0, *p2 = (char *)Ra1;
+	if (a0 == 0 || a1 == 0)
+	{
+		v0 = 0;
+		pc0 = ra;
+		return;
+	}
 	while ((*p1++ = *p2++) != '\0');
 
 	v0 = a0; pc0 = ra;
@@ -638,7 +644,12 @@ void psxBios_strcpy() { // 0x19
 void psxBios_strncpy() { // 0x1a
 	char *p1 = (char *)Ra0, *p2 = (char *)Ra1;
 	s32 n = a2, i;
-
+	if (a0 == 0 || a1 == 0)
+	{
+		v0 = 0;
+		pc0 = ra;
+		return;
+	}
 	for (i = 0; i < n; i++) {
 		if ((*p1++ = *p2++) == '\0') {
 			while (++i < n) {