From 4082c4eda6d8282abf0ba7763ed4fd66ecd176f1 Mon Sep 17 00:00:00 2001
From: Zach Hilman <zachhilman@gmail.com>
Date: Thu, 6 Dec 2018 20:28:51 -0500
Subject: [PATCH] savedata_factory: Partially implement IVFC save sizes using
files
This stores a file in the save directory called '.yuzu_save_size' which stores the two save sizes (normal area and journaled area) sequentially as u64s.
---
src/core/file_sys/savedata_factory.cpp | 30 ++++++++++++++++++++++++++
src/core/file_sys/savedata_factory.h | 8 +++++++
2 files changed, 38 insertions(+)
diff --git a/src/core/file_sys/savedata_factory.cpp b/src/core/file_sys/savedata_factory.cpp
index d63b7f19b..54f5b698a 100644
--- a/src/core/file_sys/savedata_factory.cpp
+++ b/src/core/file_sys/savedata_factory.cpp
@@ -13,6 +13,8 @@
namespace FileSys {
+constexpr const char* SAVE_DATA_SIZE_FILENAME = ".yuzu_save_size";
+
std::string SaveDataDescriptor::DebugInfo() const {
return fmt::format("[type={:02X}, title_id={:016X}, user_id={:016X}{:016X}, save_id={:016X}]",
static_cast<u8>(type), title_id, user_id[1], user_id[0], save_id);
@@ -132,4 +134,32 @@ std::string SaveDataFactory::GetFullPath(SaveDataSpaceId space, SaveDataType typ
}
}
+SaveDataSize SaveDataFactory::ReadSaveDataSize(SaveDataType type, u64 title_id,
+ u128 user_id) const {
+ const auto path = GetFullPath(SaveDataSpaceId::NandUser, type, title_id, user_id, 0);
+ const auto dir = GetOrCreateDirectoryRelative(this->dir, path);
+
+ const auto size_file = dir->GetFile(SAVE_DATA_SIZE_FILENAME);
+ if (size_file == nullptr || size_file->GetSize() < sizeof(SaveDataSize))
+ return {0, 0};
+
+ SaveDataSize out;
+ if (size_file->ReadObject(&out) != sizeof(SaveDataSize))
+ return {0, 0};
+ return out;
+}
+
+void SaveDataFactory::WriteSaveDataSize(SaveDataType type, u64 title_id, u128 user_id,
+ SaveDataSize new_value) {
+ const auto path = GetFullPath(SaveDataSpaceId::NandUser, type, title_id, user_id, 0);
+ const auto dir = GetOrCreateDirectoryRelative(this->dir, path);
+
+ const auto size_file = dir->CreateFile(SAVE_DATA_SIZE_FILENAME);
+ if (size_file == nullptr)
+ return;
+
+ size_file->Resize(sizeof(SaveDataSize));
+ size_file->WriteObject(new_value);
+}
+
} // namespace FileSys
diff --git a/src/core/file_sys/savedata_factory.h b/src/core/file_sys/savedata_factory.h
index bd4919610..3a1caf292 100644
--- a/src/core/file_sys/savedata_factory.h
+++ b/src/core/file_sys/savedata_factory.h
@@ -46,6 +46,11 @@ struct SaveDataDescriptor {
};
static_assert(sizeof(SaveDataDescriptor) == 0x40, "SaveDataDescriptor has incorrect size.");
+struct SaveDataSize {
+ u64 normal;
+ u64 journal;
+};
+
/// File system interface to the SaveData archive
class SaveDataFactory {
public:
@@ -60,6 +65,9 @@ public:
static std::string GetFullPath(SaveDataSpaceId space, SaveDataType type, u64 title_id,
u128 user_id, u64 save_id);
+ SaveDataSize ReadSaveDataSize(SaveDataType type, u64 title_id, u128 user_id) const;
+ void WriteSaveDataSize(SaveDataType type, u64 title_id, u128 user_id, SaveDataSize new_value);
+
private:
VirtualDir dir;
};