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.

src/core/hle/service/fs/archive.cpp

@@ -11,6 +11,7 @@
 #include "common/math_util.h"
 
 #include "core/file_sys/archive_savedata.h"
+#include "core/file_sys/archive_extsavedata.h"
 #include "core/file_sys/archive_backend.h"
 #include "core/file_sys/archive_sdmc.h"
 #include "core/file_sys/directory_backend.h"
@@ -224,25 +225,20 @@ static Archive* GetArchive(ArchiveHandle handle) {
     return (itr == handle_map.end()) ? nullptr : itr->second;
 }
 
-ResultVal<ArchiveHandle> OpenArchive(ArchiveIdCode id_code) {
+ResultVal<ArchiveHandle> OpenArchive(ArchiveIdCode id_code, FileSys::Path& archive_path) {
     LOG_TRACE(Service_FS, "Opening archive with id code 0x%08X", id_code);
 
     auto itr = id_code_map.find(id_code);
     if (itr == id_code_map.end()) {
-        if (id_code == ArchiveIdCode::SaveData) {
-            // 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. 
-            // The FormatSaveData service call will create the SaveData archive when it is called.
-            return ResultCode(ErrorDescription::FS_NotFormatted, ErrorModule::FS,
-                              ErrorSummary::InvalidState, ErrorLevel::Status);
-        }
         // TODO: Verify error against hardware
         return ResultCode(ErrorDescription::NotFound, ErrorModule::FS,
                           ErrorSummary::NotFound, ErrorLevel::Permanent);
     }
 
+    ResultCode res = itr->second->backend->Open(archive_path);
+    if (!res.IsSuccess())
+        return res;
+
     // This should never even happen in the first place with 64-bit handles, 
     while (handle_map.count(next_handle) != 0) {
         ++next_handle;
@@ -395,25 +391,14 @@ ResultVal<Handle> OpenDirectoryFromArchive(ArchiveHandle archive_handle, const F
 }
 
 ResultCode FormatSaveData() {
-    // TODO(Subv): Actually wipe the savedata folder after creating or opening it
-
     // Do not create the archive again if it already exists
-    if (id_code_map.find(ArchiveIdCode::SaveData) != id_code_map.end())
-        return UnimplementedFunction(ErrorModule::FS); // TODO(Subv): Find the correct error code
-
-    // Create the SaveData archive
-    std::string savedata_directory = FileUtil::GetUserPath(D_SAVEDATA_IDX);
-    auto savedata_archive = Common::make_unique<FileSys::Archive_SaveData>(savedata_directory,
-        Kernel::g_program_id);
-
-    if (savedata_archive->Initialize()) {
-        CreateArchive(std::move(savedata_archive), ArchiveIdCode::SaveData);
-        return RESULT_SUCCESS;
-    } else {
-        LOG_ERROR(Service_FS, "Can't instantiate SaveData archive with path %s",
-            savedata_archive->GetMountPoint().c_str());
-        return UnimplementedFunction(ErrorModule::FS); // TODO(Subv): Find the proper error code
+    auto archive_itr = id_code_map.find(ArchiveIdCode::SaveData);
+    if (archive_itr == id_code_map.end()) {
+        return UnimplementedFunction(ErrorModule::FS); // TODO(Subv): Find the right error
     }
+
+    // Use an empty path, we do not use it when formatting the savedata
+    return archive_itr->second->backend->Format(FileSys::Path());
 }
 
 /// Initialize archives
@@ -430,6 +415,26 @@ void ArchiveInit() {
         CreateArchive(std::move(sdmc_archive), ArchiveIdCode::SDMC);
     else
         LOG_ERROR(Service_FS, "Can't instantiate SDMC archive with path %s", sdmc_directory.c_str());
+    
+    // Create the SaveData archive
+    std::string savedata_directory = FileUtil::GetUserPath(D_SAVEDATA_IDX);
+    auto savedata_archive = Common::make_unique<FileSys::Archive_SaveData>(savedata_directory);
+    CreateArchive(std::move(savedata_archive), ArchiveIdCode::SaveData);
+
+    std::string extsavedata_directory = FileUtil::GetUserPath(D_EXTSAVEDATA);
+    auto extsavedata_archive = Common::make_unique<FileSys::Archive_ExtSaveData>(extsavedata_directory);
+    if (extsavedata_archive->Initialize())
+        CreateArchive(std::move(extsavedata_archive), ArchiveIdCode::ExtSaveData);
+    else
+        LOG_ERROR(Service_FS, "Can't instantiate ExtSaveData archive with path %s", extsavedata_directory.c_str());
+
+    std::string sharedextsavedata_directory = FileUtil::GetUserPath(D_EXTSAVEDATA);
+    auto sharedextsavedata_archive = Common::make_unique<FileSys::Archive_ExtSaveData>(sharedextsavedata_directory);
+    if (sharedextsavedata_archive->Initialize())
+        CreateArchive(std::move(sharedextsavedata_archive), ArchiveIdCode::SharedExtSaveData);
+    else
+        LOG_ERROR(Service_FS, "Can't instantiate SharedExtSaveData archive with path %s", 
+                  sharedextsavedata_directory.c_str());
 }
 
 /// Shutdown archives

src/core/hle/service/fs/archive.h

@@ -29,9 +29,10 @@ typedef u64 ArchiveHandle;
 /**
  * Opens an archive
  * @param id_code IdCode of the archive to open
+ * @param archive_path Path to the archive, used with Binary paths
  * @return Handle to the opened archive
  */
-ResultVal<ArchiveHandle> OpenArchive(ArchiveIdCode id_code);
+ResultVal<ArchiveHandle> OpenArchive(ArchiveIdCode id_code, FileSys::Path& archive_path);
 
 /**
  * Closes an archive

src/core/hle/service/fs/fs_user.cpp

@@ -107,14 +107,7 @@ static void OpenFileDirectly(Service::Interface* self) {
     LOG_DEBUG(Service_FS, "archive_path=%s file_path=%s, mode=%u attributes=%d",
               archive_path.DebugStr().c_str(), file_path.DebugStr().c_str(), mode.hex, attributes);
 
-    if (archive_path.GetType() != FileSys::Empty) {
-        LOG_ERROR(Service_FS, "archive LowPath type other than empty is currently unsupported");
-        cmd_buff[1] = UnimplementedFunction(ErrorModule::FS).raw;
-        cmd_buff[3] = 0;
-        return;
-    }
-
-    ResultVal<ArchiveHandle> archive_handle = OpenArchive(archive_id);
+    ResultVal<ArchiveHandle> archive_handle = OpenArchive(archive_id, archive_path);
     if (archive_handle.Failed()) {
         LOG_ERROR(Service_FS, "failed to get a handle for archive");
         cmd_buff[1] = archive_handle.Code().raw;
@@ -376,13 +369,7 @@ static void OpenArchive(Service::Interface* self) {
 
     LOG_DEBUG(Service_FS, "archive_path=%s", archive_path.DebugStr().c_str());
 
-    if (archive_path.GetType() != FileSys::Empty) {
-        LOG_ERROR(Service_FS, "archive LowPath type other than empty is currently unsupported");
-        cmd_buff[1] = UnimplementedFunction(ErrorModule::FS).raw;
-        return;
-    }
-
-    ResultVal<ArchiveHandle> handle = OpenArchive(archive_id);
+    ResultVal<ArchiveHandle> handle = OpenArchive(archive_id, archive_path);
     cmd_buff[1] = handle.Code().raw;
     if (handle.Succeeded()) {
         cmd_buff[2] = *handle & 0xFFFFFFFF;