From 589b6427909dfc7a4b5ee1a64cb86d38d459b0f3 Mon Sep 17 00:00:00 2001
From: wwylele <wwylele@gmail.com>
Date: Tue, 29 Nov 2016 00:52:11 +0200
Subject: FileSys: Implement OtherSaveData

---
 src/core/file_sys/archive_other_savedata.cpp | 145 +++++++++++++++++++++++++++
 1 file changed, 145 insertions(+)
 create mode 100644 src/core/file_sys/archive_other_savedata.cpp

(limited to 'src/core/file_sys/archive_other_savedata.cpp')

diff --git a/src/core/file_sys/archive_other_savedata.cpp b/src/core/file_sys/archive_other_savedata.cpp
new file mode 100644
index 000000000..d3cf080da
--- /dev/null
+++ b/src/core/file_sys/archive_other_savedata.cpp
@@ -0,0 +1,145 @@
+// Copyright 2016 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <tuple>
+#include "core/file_sys/archive_other_savedata.h"
+#include "core/file_sys/errors.h"
+#include "core/hle/kernel/process.h"
+#include "core/hle/service/fs/archive.h"
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+// FileSys namespace
+
+namespace FileSys {
+
+// TODO(wwylele): The storage info in exheader should be checked before accessing these archives
+
+using Service::FS::MediaType;
+
+namespace {
+
+template <typename T>
+ResultVal<std::tuple<MediaType, u64>> ParsePath(const Path& path, T program_id_reader) {
+    if (path.GetType() != Binary) {
+        LOG_ERROR(Service_FS, "Wrong path type %d", static_cast<int>(path.GetType()));
+        return ERROR_INVALID_PATH;
+    }
+
+    std::vector<u8> vec_data = path.AsBinary();
+
+    if (vec_data.size() != 12) {
+        LOG_ERROR(Service_FS, "Wrong path length %zu", vec_data.size());
+        return ERROR_INVALID_PATH;
+    }
+
+    const u32* data = reinterpret_cast<const u32*>(vec_data.data());
+    auto media_type = static_cast<MediaType>(data[0]);
+
+    if (media_type != MediaType::SDMC && media_type != MediaType::GameCard) {
+        LOG_ERROR(Service_FS, "Unsupported media type %u", static_cast<u32>(media_type));
+
+        // Note: this is strange, but the error code was verified with a real 3DS
+        return ERROR_UNSUPPORTED_OPEN_FLAGS;
+    }
+
+    return MakeResult<std::tuple<MediaType, u64>>(media_type, program_id_reader(data));
+}
+
+ResultVal<std::tuple<MediaType, u64>> ParsePathPermitted(const Path& path) {
+    return ParsePath(path,
+                     [](const u32* data) -> u64 { return (data[1] << 8) | 0x0004000000000000ULL; });
+}
+
+ResultVal<std::tuple<MediaType, u64>> ParsePathGeneral(const Path& path) {
+    return ParsePath(
+        path, [](const u32* data) -> u64 { return data[1] | (static_cast<u64>(data[2]) << 32); });
+}
+
+} // namespace
+
+ArchiveFactory_OtherSaveDataPermitted::ArchiveFactory_OtherSaveDataPermitted(
+    std::shared_ptr<ArchiveSource_SDSaveData> sd_savedata)
+    : sd_savedata_source(sd_savedata) {}
+
+ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_OtherSaveDataPermitted::Open(
+    const Path& path) {
+    MediaType media_type;
+    u64 program_id;
+    CASCADE_RESULT(std::tie(media_type, program_id), ParsePathPermitted(path));
+
+    if (media_type == MediaType::GameCard) {
+        LOG_WARNING(Service_FS, "(stubbed) Unimplemented media type GameCard");
+        return ERROR_GAMECARD_NOT_INSERTED;
+    }
+
+    return sd_savedata_source->Open(program_id);
+}
+
+ResultCode ArchiveFactory_OtherSaveDataPermitted::Format(
+    const Path& path, const FileSys::ArchiveFormatInfo& format_info) {
+    LOG_ERROR(Service_FS, "Attempted to format a OtherSaveDataPermitted archive.");
+    return ERROR_INVALID_PATH;
+}
+
+ResultVal<ArchiveFormatInfo> ArchiveFactory_OtherSaveDataPermitted::GetFormatInfo(
+    const Path& path) const {
+    MediaType media_type;
+    u64 program_id;
+    CASCADE_RESULT(std::tie(media_type, program_id), ParsePathPermitted(path));
+
+    if (media_type == MediaType::GameCard) {
+        LOG_WARNING(Service_FS, "(stubbed) Unimplemented media type GameCard");
+        return ERROR_GAMECARD_NOT_INSERTED;
+    }
+
+    return sd_savedata_source->GetFormatInfo(program_id);
+}
+
+ArchiveFactory_OtherSaveDataGeneral::ArchiveFactory_OtherSaveDataGeneral(
+    std::shared_ptr<ArchiveSource_SDSaveData> sd_savedata)
+    : sd_savedata_source(sd_savedata) {}
+
+ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_OtherSaveDataGeneral::Open(
+    const Path& path) {
+    MediaType media_type;
+    u64 program_id;
+    CASCADE_RESULT(std::tie(media_type, program_id), ParsePathGeneral(path));
+
+    if (media_type == MediaType::GameCard) {
+        LOG_WARNING(Service_FS, "(stubbed) Unimplemented media type GameCard");
+        return ERROR_GAMECARD_NOT_INSERTED;
+    }
+
+    return sd_savedata_source->Open(program_id);
+}
+
+ResultCode ArchiveFactory_OtherSaveDataGeneral::Format(
+    const Path& path, const FileSys::ArchiveFormatInfo& format_info) {
+    MediaType media_type;
+    u64 program_id;
+    CASCADE_RESULT(std::tie(media_type, program_id), ParsePathGeneral(path));
+
+    if (media_type == MediaType::GameCard) {
+        LOG_WARNING(Service_FS, "(stubbed) Unimplemented media type GameCard");
+        return ERROR_GAMECARD_NOT_INSERTED;
+    }
+
+    return sd_savedata_source->Format(program_id, format_info);
+}
+
+ResultVal<ArchiveFormatInfo> ArchiveFactory_OtherSaveDataGeneral::GetFormatInfo(
+    const Path& path) const {
+    MediaType media_type;
+    u64 program_id;
+    CASCADE_RESULT(std::tie(media_type, program_id), ParsePathGeneral(path));
+
+    if (media_type == MediaType::GameCard) {
+        LOG_WARNING(Service_FS, "(stubbed) Unimplemented media type GameCard");
+        return ERROR_GAMECARD_NOT_INSERTED;
+    }
+
+    return sd_savedata_source->GetFormatInfo(program_id);
+}
+
+} // namespace FileSys
-- 
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