From 70a510bd8f2f8d150abe632c94dc9a3eb247e43f Mon Sep 17 00:00:00 2001
From: Zach Hilman <zachhilman@gmail.com>
Date: Thu, 9 Aug 2018 20:49:45 -0400
Subject: bis_factory: Add partial implementation of BISFactory Creates and
 stores RegisteredCaches for user and system NAND, as creation of a
 RegisteredCache is expensive.

---
 src/core/file_sys/bis_factory.cpp | 24 ++++++++++++++++++++++++
 src/core/file_sys/bis_factory.h   | 30 ++++++++++++++++++++++++++++++
 2 files changed, 54 insertions(+)
 create mode 100644 src/core/file_sys/bis_factory.cpp
 create mode 100644 src/core/file_sys/bis_factory.h

diff --git a/src/core/file_sys/bis_factory.cpp b/src/core/file_sys/bis_factory.cpp
new file mode 100644
index 000000000..7d0de733b
--- /dev/null
+++ b/src/core/file_sys/bis_factory.cpp
@@ -0,0 +1,24 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/file_sys/bis_factory.h"
+
+namespace FileSys {
+
+BISFactory::BISFactory(VirtualDir nand_root_)
+    : nand_root(std::move(nand_root_)),
+      sysnand_cache(std::make_shared<RegisteredCache>(
+          nand_root->GetDirectoryRelative("/system/Contents/registered"))),
+      usrnand_cache(std::make_shared<RegisteredCache>(
+          nand_root->GetDirectoryRelative("/user/Contents/registered"))) {}
+
+std::shared_ptr<RegisteredCache> BISFactory::GetSystemNANDContents() const {
+    return sysnand_cache;
+}
+
+std::shared_ptr<RegisteredCache> BISFactory::GetUserNANDContents() const {
+    return usrnand_cache;
+}
+
+} // namespace FileSys
diff --git a/src/core/file_sys/bis_factory.h b/src/core/file_sys/bis_factory.h
new file mode 100644
index 000000000..a970a5e2e
--- /dev/null
+++ b/src/core/file_sys/bis_factory.h
@@ -0,0 +1,30 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include "core/loader/loader.h"
+#include "registered_cache.h"
+
+namespace FileSys {
+
+/// File system interface to the Built-In Storage
+/// This is currently missing accessors to BIS partitions, but seemed like a good place for the NAND
+/// registered caches.
+class BISFactory {
+public:
+    explicit BISFactory(VirtualDir nand_root);
+
+    std::shared_ptr<RegisteredCache> GetSystemNANDContents() const;
+    std::shared_ptr<RegisteredCache> GetUserNANDContents() const;
+
+private:
+    VirtualDir nand_root;
+
+    std::shared_ptr<RegisteredCache> sysnand_cache;
+    std::shared_ptr<RegisteredCache> usrnand_cache;
+};
+
+} // namespace FileSys
-- 
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