1 files changed, 93 insertions, 0 deletions
diff --git a/src/core/file_sys/archive_source_sd_savedata.cpp b/src/core/file_sys/archive_source_sd_savedata.cpp
new file mode 100644
index 000000000..2d8a950a3
--- /dev/null
+++ b/src/core/file_sys/archive_source_sd_savedata.cpp
@@ -0,0 +1,93 @@
+// Copyright 2016 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/file_util.h"
+#include "common/logging/log.h"
+#include "common/string_util.h"
+#include "core/file_sys/archive_source_sd_savedata.h"
+#include "core/file_sys/savedata_archive.h"
+#include "core/hle/service/fs/archive.h"
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+// FileSys namespace
+
+namespace FileSys {
+
+namespace {
+
+std::string GetSaveDataContainerPath(const std::string& sdmc_directory) {
+    return Common::StringFromFormat("%sNintendo 3DS/%s/%s/title/", sdmc_directory.c_str(),
+                                    SYSTEM_ID.c_str(), SDCARD_ID.c_str());
+}
+
+std::string GetSaveDataPath(const std::string& mount_location, u64 program_id) {
+    u32 high = static_cast<u32>(program_id >> 32);
+    u32 low = static_cast<u32>(program_id & 0xFFFFFFFF);
+    return Common::StringFromFormat("%s%08x/%08x/data/00000001/", mount_location.c_str(), high,
+                                    low);
+}
+
+std::string GetSaveDataMetadataPath(const std::string& mount_location, u64 program_id) {
+    u32 high = static_cast<u32>(program_id >> 32);
+    u32 low = static_cast<u32>(program_id & 0xFFFFFFFF);
+    return Common::StringFromFormat("%s%08x/%08x/data/00000001.metadata", mount_location.c_str(),
+                                    high, low);
+}
+
+} // namespace
+
+ArchiveSource_SDSaveData::ArchiveSource_SDSaveData(const std::string& sdmc_directory)
+    : mount_point(GetSaveDataContainerPath(sdmc_directory)) {
+    LOG_INFO(Service_FS, "Directory %s set as SaveData.", mount_point.c_str());
+}
+
+ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveSource_SDSaveData::Open(u64 program_id) {
+    std::string concrete_mount_point = GetSaveDataPath(mount_point, program_id);
+    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);
+    }
+
+    auto archive = std::make_unique<SaveDataArchive>(std::move(concrete_mount_point));
+    return MakeResult<std::unique_ptr<ArchiveBackend>>(std::move(archive));
+}
+
+ResultCode ArchiveSource_SDSaveData::Format(u64 program_id,
+                                            const FileSys::ArchiveFormatInfo& format_info) {
+    std::string concrete_mount_point = GetSaveDataPath(mount_point, program_id);
+    FileUtil::DeleteDirRecursively(concrete_mount_point);
+    FileUtil::CreateFullPath(concrete_mount_point);
+
+    // Write the format metadata
+    std::string metadata_path = GetSaveDataMetadataPath(mount_point, program_id);
+    FileUtil::IOFile file(metadata_path, "wb");
+
+    if (file.IsOpen()) {
+        file.WriteBytes(&format_info, sizeof(format_info));
+        return RESULT_SUCCESS;
+    }
+    return RESULT_SUCCESS;
+}
+
+ResultVal<ArchiveFormatInfo> ArchiveSource_SDSaveData::GetFormatInfo(u64 program_id) const {
+    std::string metadata_path = GetSaveDataMetadataPath(mount_point, program_id);
+    FileUtil::IOFile file(metadata_path, "rb");
+
+    if (!file.IsOpen()) {
+        LOG_ERROR(Service_FS, "Could not open metadata information for archive");
+        // TODO(Subv): Verify error code
+        return ResultCode(ErrorDescription::FS_NotFormatted, ErrorModule::FS,
+                          ErrorSummary::InvalidState, ErrorLevel::Status);
+    }
+
+    ArchiveFormatInfo info = {};
+    file.ReadBytes(&info, sizeof(info));
+    return MakeResult<ArchiveFormatInfo>(info);
+}
+
+} // namespace FileSys