From 191565a1b8e8edfdd468f5c77cdbad4520287ff1 Mon Sep 17 00:00:00 2001
From: Subv <subv2112@gmail.com>
Date: Mon, 6 Nov 2017 15:12:15 -0500
Subject: [PATCH] HLE/NS: Added a function to launch titles installed to the
 virtual NAND/SD card.

It uses AM::GetTitleContentPath to retrieve the path of the program to launch.
---
 src/core/hle/service/ns/ns.cpp | 23 +++++++++++++++++++++++
 src/core/hle/service/ns/ns.h   |  4 ++++
 2 files changed, 27 insertions(+)

diff --git a/src/core/hle/service/ns/ns.cpp b/src/core/hle/service/ns/ns.cpp
index 9e19c38bf9..9616cc8f6b 100644
--- a/src/core/hle/service/ns/ns.cpp
+++ b/src/core/hle/service/ns/ns.cpp
@@ -2,12 +2,35 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include <cinttypes>
+#include "core/hle/service/am/am.h"
 #include "core/hle/service/ns/ns.h"
 #include "core/hle/service/ns/ns_s.h"
+#include "core/loader/loader.h"
 
 namespace Service {
 namespace NS {
 
+Kernel::SharedPtr<Kernel::Process> LaunchTitle(FS::MediaType media_type, u64 title_id) {
+    std::string path = AM::GetTitleContentPath(media_type, title_id);
+    auto loader = Loader::GetLoader(path);
+
+    if (!loader) {
+        LOG_WARNING(Service_NS, "Could not find .app for title 0x%016" PRIx64, title_id);
+        return nullptr;
+    }
+
+    Kernel::SharedPtr<Kernel::Process> process;
+    Loader::ResultStatus result = loader->Load(process);
+
+    if (result != Loader::ResultStatus::Success) {
+        LOG_WARNING(Service_NS, "Error loading .app for title 0x%016" PRIx64, title_id);
+        return nullptr;
+    }
+
+    return process;
+}
+
 void InstallInterfaces(SM::ServiceManager& service_manager) {
     std::make_shared<NS_S>()->InstallAsService(service_manager);
 }
diff --git a/src/core/hle/service/ns/ns.h b/src/core/hle/service/ns/ns.h
index c3d67d98c8..6fb171c1a4 100644
--- a/src/core/hle/service/ns/ns.h
+++ b/src/core/hle/service/ns/ns.h
@@ -4,11 +4,15 @@
 
 #pragma once
 
+#include "core/hle/kernel/process.h"
 #include "core/hle/service/service.h"
 
 namespace Service {
 namespace NS {
 
+/// Loads and launches the title identified by title_id in the specified media type.
+Kernel::SharedPtr<Kernel::Process> LaunchTitle(FS::MediaType media_type, u64 title_id);
+
 /// Registers all NS services with the specified service manager.
 void InstallInterfaces(SM::ServiceManager& service_manager);