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service: filesystem: Return proper error codes for CreateFile 

This improves the accuracy of CreateFile by returning the correct error codes on certain conditions (parent directory does not exist, path already exists).

This fixes saving and the loading of existing saves in New Pokemon Snap
merge-requests/60/head
Morph 2021-05-01 09:33:00 +07:00
parent fa3ffff8de
commit 72b22fd433
2 changed files with 8 additions and 2 deletions
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1
src/core/file_sys/errors.h
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@ -9,6 +9,7 @@
namespace FileSys {
constexpr ResultCode ERROR_PATH_NOT_FOUND{ErrorModule::FS, 1};
constexpr ResultCode ERROR_PATH_ALREADY_EXISTS{ErrorModule::FS, 2};
constexpr ResultCode ERROR_ENTITY_NOT_FOUND{ErrorModule::FS, 1002};
constexpr ResultCode ERROR_SD_CARD_NOT_FOUND{ErrorModule::FS, 2001};
constexpr ResultCode ERROR_OUT_OF_BOUNDS{ErrorModule::FS, 3005};

9
src/core/hle/service/filesystem/filesystem.cpp
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@ -55,10 +55,15 @@ std::string VfsDirectoryServiceWrapper::GetName() const {
ResultCode VfsDirectoryServiceWrapper::CreateFile(const std::string& path_, u64 size) const {
std::string path(Common::FS::SanitizePath(path_));
auto dir = GetDirectoryRelativeWrapped(backing, Common::FS::GetParentPath(path));
// dir can be nullptr if path contains subdirectories, create those prior to creating the file.
if (dir == nullptr) {
dir = backing->CreateSubdirectory(Common::FS::GetParentPath(path));
return FileSys::ERROR_PATH_NOT_FOUND;
}
const auto entry_type = GetEntryType(path);
if (entry_type.Code() == RESULT_SUCCESS) {
return FileSys::ERROR_PATH_ALREADY_EXISTS;
}
auto file = dir->CreateFile(Common::FS::GetFilename(path));
if (file == nullptr) {
// TODO(DarkLordZach): Find a better error code for this