From 3d80d454ce6ec80456f071decab98be50e7f6dae Mon Sep 17 00:00:00 2001
From: JosJuice <josjuice@gmail.com>
Date: Sat, 12 Nov 2016 16:19:10 +0100
Subject: [PATCH] HLE_OS: Implement %n in GetStringVA

%n writes to a pointer that's provided as a parameter.
We didn't have a custom implementation of this before,
meaning that %n would trigger a write to the host
memory instead of the emulated memory!
---
 Source/Core/Core/HLE/HLE_OS.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Source/Core/Core/HLE/HLE_OS.cpp b/Source/Core/Core/HLE/HLE_OS.cpp
index d181971e9d..300cb57cc6 100644
--- a/Source/Core/Core/HLE/HLE_OS.cpp
+++ b/Source/Core/Core/HLE/HLE_OS.cpp
@@ -137,6 +137,11 @@ std::string GetStringVA(u32 strReg)
         result += StringFromFormat("%x", (u32)Parameter);
         break;
 
+      case 'n':
+        PowerPC::HostWrite_U32(static_cast<u32>(result.size()), static_cast<u32>(Parameter));
+        // %n doesn't output anything, so the result variable is untouched
+        break;
+
       default:
         result += StringFromFormat(ArgumentBuffer.c_str(), Parameter);
         break;