Archives: Implemented ExtSaveData and SharedExtSaveData

They will be stored in /extsavedata/SDMC and /extsavedata/NAND respectively.
Also redirect some APT_A functions to their APT_U equivalents.
Implemented the gamecoin.dat file in SharedExtSaveData in the PTM module.
Implemented formatting the savegame.
Retake a previous savegame if it exists instead of reporting them as not formatted every time a game is loaded.

1 files changed, 18 insertions, 7 deletions

diff --git a/src/core/file_sys/archive_savedata.cpp b/src/core/file_sys/archive_savedata.cpp
index 97853567..280d4ff5 100644
--- a/src/core/file_sys/archive_savedata.cpp
+++ b/src/core/file_sys/archive_savedata.cpp
@@ -16,18 +16,29 @@
 
 namespace FileSys {
 
-Archive_SaveData::Archive_SaveData(const std::string& mount_point, u64 program_id)
-        : DiskArchive(mount_point + Common::StringFromFormat("%016X", program_id) + DIR_SEP) {
+Archive_SaveData::Archive_SaveData(const std::string& mount_point)
+        : DiskArchive(mount_point) {
     LOG_INFO(Service_FS, "Directory %s set as SaveData.", this->mount_point.c_str());
 }
 
-bool Archive_SaveData::Initialize() {
-    if (!FileUtil::CreateFullPath(mount_point)) {
-        LOG_ERROR(Service_FS, "Unable to create SaveData path.");
-        return false;
+ResultCode Archive_SaveData::Open(const Path& path) {
+    if (concrete_mount_point.empty())
+        concrete_mount_point = Common::StringFromFormat("%s%016X", mount_point.c_str(), Kernel::g_program_id) + DIR_SEP;
+    if (!FileUtil::Exists(concrete_mount_point)) {
+        // When a SaveData archive is created for the first time, it is not yet formatted
+        // and the save file/directory structure expected by the game has not yet been initialized. 
+        // Returning the NotFormatted error code will signal the game to provision the SaveData archive 
+        // with the files and folders that it expects. 
+        return ResultCode(ErrorDescription::FS_NotFormatted, ErrorModule::FS,
+            ErrorSummary::InvalidState, ErrorLevel::Status);
     }
+    return RESULT_SUCCESS;
+}
 
-    return true;
+ResultCode Archive_SaveData::Format(const Path& path) const {
+    FileUtil::DeleteDirRecursively(concrete_mount_point);
+    FileUtil::CreateFullPath(concrete_mount_point);
+    return RESULT_SUCCESS;
 }
 
 } // namespace FileSys