1 files changed, 283 insertions, 0 deletions

diff --git a/src/core/file_sys/savedata_archive.cpp b/src/core/file_sys/savedata_archive.cpp
new file mode 100644
index 000000000..f2e6a06bc
--- /dev/null
+++ b/src/core/file_sys/savedata_archive.cpp
@@ -0,0 +1,283 @@
+// 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 "core/file_sys/disk_archive.h"
+#include "core/file_sys/errors.h"
+#include "core/file_sys/path_parser.h"
+#include "core/file_sys/savedata_archive.h"
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+// FileSys namespace
+
+namespace FileSys {
+
+ResultVal<std::unique_ptr<FileBackend>> SaveDataArchive::OpenFile(const Path& path,
+                                                                  const Mode& mode) const {
+    LOG_DEBUG(Service_FS, "called path=%s mode=%01X", path.DebugStr().c_str(), mode.hex);
+
+    const PathParser path_parser(path);
+
+    if (!path_parser.IsValid()) {
+        LOG_ERROR(Service_FS, "Invalid path %s", path.DebugStr().c_str());
+        return ERROR_INVALID_PATH;
+    }
+
+    if (mode.hex == 0) {
+        LOG_ERROR(Service_FS, "Empty open mode");
+        return ERROR_UNSUPPORTED_OPEN_FLAGS;
+    }
+
+    if (mode.create_flag && !mode.write_flag) {
+        LOG_ERROR(Service_FS, "Create flag set but write flag not set");
+        return ERROR_UNSUPPORTED_OPEN_FLAGS;
+    }
+
+    const auto full_path = path_parser.BuildHostPath(mount_point);
+
+    switch (path_parser.GetHostStatus(mount_point)) {
+    case PathParser::InvalidMountPoint:
+        LOG_CRITICAL(Service_FS, "(unreachable) Invalid mount point %s", mount_point.c_str());
+        return ERROR_FILE_NOT_FOUND;
+    case PathParser::PathNotFound:
+        LOG_ERROR(Service_FS, "Path not found %s", full_path.c_str());
+        return ERROR_PATH_NOT_FOUND;
+    case PathParser::FileInPath:
+    case PathParser::DirectoryFound:
+        LOG_ERROR(Service_FS, "Unexpected file or directory in %s", full_path.c_str());
+        return ERROR_UNEXPECTED_FILE_OR_DIRECTORY;
+    case PathParser::NotFound:
+        if (!mode.create_flag) {
+            LOG_ERROR(Service_FS, "Non-existing file %s can't be open without mode create.",
+                      full_path.c_str());
+            return ERROR_FILE_NOT_FOUND;
+        } else {
+            // Create the file
+            FileUtil::CreateEmptyFile(full_path);
+        }
+        break;
+    }
+
+    FileUtil::IOFile file(full_path, mode.write_flag ? "r+b" : "rb");
+    if (!file.IsOpen()) {
+        LOG_CRITICAL(Service_FS, "(unreachable) Unknown error opening %s", full_path.c_str());
+        return ERROR_FILE_NOT_FOUND;
+    }
+
+    auto disk_file = std::make_unique<DiskFile>(std::move(file), mode);
+    return MakeResult<std::unique_ptr<FileBackend>>(std::move(disk_file));
+}
+
+ResultCode SaveDataArchive::DeleteFile(const Path& path) const {
+    const PathParser path_parser(path);
+
+    if (!path_parser.IsValid()) {
+        LOG_ERROR(Service_FS, "Invalid path %s", path.DebugStr().c_str());
+        return ERROR_INVALID_PATH;
+    }
+
+    const auto full_path = path_parser.BuildHostPath(mount_point);
+
+    switch (path_parser.GetHostStatus(mount_point)) {
+    case PathParser::InvalidMountPoint:
+        LOG_CRITICAL(Service_FS, "(unreachable) Invalid mount point %s", mount_point.c_str());
+        return ERROR_FILE_NOT_FOUND;
+    case PathParser::PathNotFound:
+        LOG_ERROR(Service_FS, "Path not found %s", full_path.c_str());
+        return ERROR_PATH_NOT_FOUND;
+    case PathParser::FileInPath:
+    case PathParser::DirectoryFound:
+    case PathParser::NotFound:
+        LOG_ERROR(Service_FS, "File not found %s", full_path.c_str());
+        return ERROR_FILE_NOT_FOUND;
+    }
+
+    if (FileUtil::Delete(full_path)) {
+        return RESULT_SUCCESS;
+    }
+
+    LOG_CRITICAL(Service_FS, "(unreachable) Unknown error deleting %s", full_path.c_str());
+    return ERROR_FILE_NOT_FOUND;
+}
+
+ResultCode SaveDataArchive::RenameFile(const Path& src_path, const Path& dest_path) const {
+    if (FileUtil::Rename(mount_point + src_path.AsString(), mount_point + dest_path.AsString())) {
+        return RESULT_SUCCESS;
+    }
+
+    // TODO(yuriks): This code probably isn't right, it'll return a Status even if the file didn't
+    // exist or similar. Verify.
+    return ResultCode(ErrorDescription::NoData, ErrorModule::FS, // TODO: verify description
+                      ErrorSummary::NothingHappened, ErrorLevel::Status);
+}
+
+template <typename T>
+static ResultCode DeleteDirectoryHelper(const Path& path, const std::string& mount_point,
+                                        T deleter) {
+    const PathParser path_parser(path);
+
+    if (!path_parser.IsValid()) {
+        LOG_ERROR(Service_FS, "Invalid path %s", path.DebugStr().c_str());
+        return ERROR_INVALID_PATH;
+    }
+
+    if (path_parser.IsRootDirectory())
+        return ERROR_DIRECTORY_NOT_EMPTY;
+
+    const auto full_path = path_parser.BuildHostPath(mount_point);
+
+    switch (path_parser.GetHostStatus(mount_point)) {
+    case PathParser::InvalidMountPoint:
+        LOG_CRITICAL(Service_FS, "(unreachable) Invalid mount point %s", mount_point.c_str());
+        return ERROR_PATH_NOT_FOUND;
+    case PathParser::PathNotFound:
+    case PathParser::NotFound:
+        LOG_ERROR(Service_FS, "Path not found %s", full_path.c_str());
+        return ERROR_PATH_NOT_FOUND;
+    case PathParser::FileInPath:
+    case PathParser::FileFound:
+        LOG_ERROR(Service_FS, "Unexpected file or directory %s", full_path.c_str());
+        return ERROR_UNEXPECTED_FILE_OR_DIRECTORY;
+    }
+
+    if (deleter(full_path)) {
+        return RESULT_SUCCESS;
+    }
+
+    LOG_ERROR(Service_FS, "Directory not empty %s", full_path.c_str());
+    return ERROR_DIRECTORY_NOT_EMPTY;
+}
+
+ResultCode SaveDataArchive::DeleteDirectory(const Path& path) const {
+    return DeleteDirectoryHelper(path, mount_point, FileUtil::DeleteDir);
+}
+
+ResultCode SaveDataArchive::DeleteDirectoryRecursively(const Path& path) const {
+    return DeleteDirectoryHelper(
+        path, mount_point, [](const std::string& p) { return FileUtil::DeleteDirRecursively(p); });
+}
+
+ResultCode SaveDataArchive::CreateFile(const FileSys::Path& path, u64 size) const {
+    const PathParser path_parser(path);
+
+    if (!path_parser.IsValid()) {
+        LOG_ERROR(Service_FS, "Invalid path %s", path.DebugStr().c_str());
+        return ERROR_INVALID_PATH;
+    }
+
+    const auto full_path = path_parser.BuildHostPath(mount_point);
+
+    switch (path_parser.GetHostStatus(mount_point)) {
+    case PathParser::InvalidMountPoint:
+        LOG_CRITICAL(Service_FS, "(unreachable) Invalid mount point %s", mount_point.c_str());
+        return ERROR_FILE_NOT_FOUND;
+    case PathParser::PathNotFound:
+        LOG_ERROR(Service_FS, "Path not found %s", full_path.c_str());
+        return ERROR_PATH_NOT_FOUND;
+    case PathParser::FileInPath:
+        LOG_ERROR(Service_FS, "Unexpected file in path %s", full_path.c_str());
+        return ERROR_UNEXPECTED_FILE_OR_DIRECTORY;
+    case PathParser::DirectoryFound:
+    case PathParser::FileFound:
+        LOG_ERROR(Service_FS, "%s already exists", full_path.c_str());
+        return ERROR_FILE_ALREADY_EXISTS;
+    }
+
+    if (size == 0) {
+        FileUtil::CreateEmptyFile(full_path);
+        return RESULT_SUCCESS;
+    }
+
+    FileUtil::IOFile file(full_path, "wb");
+    // Creates a sparse file (or a normal file on filesystems without the concept of sparse files)
+    // We do this by seeking to the right size, then writing a single null byte.
+    if (file.Seek(size - 1, SEEK_SET) && file.WriteBytes("", 1) == 1) {
+        return RESULT_SUCCESS;
+    }
+
+    LOG_ERROR(Service_FS, "Too large file");
+    return ResultCode(ErrorDescription::TooLarge, ErrorModule::FS, ErrorSummary::OutOfResource,
+                      ErrorLevel::Info);
+}
+
+ResultCode SaveDataArchive::CreateDirectory(const Path& path) const {
+    const PathParser path_parser(path);
+
+    if (!path_parser.IsValid()) {
+        LOG_ERROR(Service_FS, "Invalid path %s", path.DebugStr().c_str());
+        return ERROR_INVALID_PATH;
+    }
+
+    const auto full_path = path_parser.BuildHostPath(mount_point);
+
+    switch (path_parser.GetHostStatus(mount_point)) {
+    case PathParser::InvalidMountPoint:
+        LOG_CRITICAL(Service_FS, "(unreachable) Invalid mount point %s", mount_point.c_str());
+        return ERROR_FILE_NOT_FOUND;
+    case PathParser::PathNotFound:
+        LOG_ERROR(Service_FS, "Path not found %s", full_path.c_str());
+        return ERROR_PATH_NOT_FOUND;
+    case PathParser::FileInPath:
+        LOG_ERROR(Service_FS, "Unexpected file in path %s", full_path.c_str());
+        return ERROR_UNEXPECTED_FILE_OR_DIRECTORY;
+    case PathParser::DirectoryFound:
+    case PathParser::FileFound:
+        LOG_ERROR(Service_FS, "%s already exists", full_path.c_str());
+        return ERROR_DIRECTORY_ALREADY_EXISTS;
+    }
+
+    if (FileUtil::CreateDir(mount_point + path.AsString())) {
+        return RESULT_SUCCESS;
+    }
+
+    LOG_CRITICAL(Service_FS, "(unreachable) Unknown error creating %s", mount_point.c_str());
+    return ResultCode(ErrorDescription::NoData, ErrorModule::FS, ErrorSummary::Canceled,
+                      ErrorLevel::Status);
+}
+
+ResultCode SaveDataArchive::RenameDirectory(const Path& src_path, const Path& dest_path) const {
+    if (FileUtil::Rename(mount_point + src_path.AsString(), mount_point + dest_path.AsString()))
+        return RESULT_SUCCESS;
+
+    // TODO(yuriks): This code probably isn't right, it'll return a Status even if the file didn't
+    // exist or similar. Verify.
+    return ResultCode(ErrorDescription::NoData, ErrorModule::FS, // TODO: verify description
+                      ErrorSummary::NothingHappened, ErrorLevel::Status);
+}
+
+ResultVal<std::unique_ptr<DirectoryBackend>> SaveDataArchive::OpenDirectory(
+    const Path& path) const {
+    const PathParser path_parser(path);
+
+    if (!path_parser.IsValid()) {
+        LOG_ERROR(Service_FS, "Invalid path %s", path.DebugStr().c_str());
+        return ERROR_INVALID_PATH;
+    }
+
+    const auto full_path = path_parser.BuildHostPath(mount_point);
+
+    switch (path_parser.GetHostStatus(mount_point)) {
+    case PathParser::InvalidMountPoint:
+        LOG_CRITICAL(Service_FS, "(unreachable) Invalid mount point %s", mount_point.c_str());
+        return ERROR_FILE_NOT_FOUND;
+    case PathParser::PathNotFound:
+    case PathParser::NotFound:
+        LOG_ERROR(Service_FS, "Path not found %s", full_path.c_str());
+        return ERROR_PATH_NOT_FOUND;
+    case PathParser::FileInPath:
+    case PathParser::FileFound:
+        LOG_ERROR(Service_FS, "Unexpected file in path %s", full_path.c_str());
+        return ERROR_UNEXPECTED_FILE_OR_DIRECTORY;
+    }
+
+    auto directory = std::make_unique<DiskDirectory>(full_path);
+    return MakeResult<std::unique_ptr<DirectoryBackend>>(std::move(directory));
+}
+
+u64 SaveDataArchive::GetFreeBytes() const {
+    // TODO: Stubbed to return 1GiB
+    return 1024 * 1024 * 1024;
+}
+
+} // namespace FileSys