Virtual Filesystem (#597)

* Add VfsFile and VfsDirectory classes

* Finish abstract Vfs classes

* Implement RealVfsFile (computer fs backend)

* Finish RealVfsFile and RealVfsDirectory

* Finished OffsetVfsFile

* More changes

* Fix import paths

* Major refactor

* Remove double const

* Use experimental/filesystem or filesystem depending on compiler

* Port partition_filesystem

* More changes

* More Overhaul

* FSP_SRV fixes

* Fixes and testing

* Try to get filesystem to compile

* Filesystem on linux

* Remove std::filesystem and document/test

* Compile fixes

* Missing include

* Bug fixes

* Fixes

* Rename v_file and v_dir

* clang-format fix

* Rename NGLOG_* to LOG_*

* Most review changes

* Fix TODO

* Guess 'main' to be Directory by filename

1 files changed, 7 insertions, 17 deletions

diff --git a/src/core/loader/elf.cpp b/src/core/loader/elf.cpp
index b69e5c6ef..4bfd5f536 100644
--- a/src/core/loader/elf.cpp
+++ b/src/core/loader/elf.cpp
@@ -365,20 +365,17 @@ SectionID ElfReader::GetSectionByName(const char* name, int firstSection) const
 
 namespace Loader {
 
-AppLoader_ELF::AppLoader_ELF(FileUtil::IOFile&& file, std::string filename)
-    : AppLoader(std::move(file)), filename(std::move(filename)) {}
+AppLoader_ELF::AppLoader_ELF(FileSys::VirtualFile file) : AppLoader(std::move(file)) {}
 
-FileType AppLoader_ELF::IdentifyType(FileUtil::IOFile& file, const std::string&) {
+FileType AppLoader_ELF::IdentifyType(const FileSys::VirtualFile& file) {
     static constexpr u16 ELF_MACHINE_ARM{0x28};
 
     u32 magic = 0;
-    file.Seek(0, SEEK_SET);
-    if (1 != file.ReadArray<u32>(&magic, 1))
+    if (4 != file->ReadObject(&magic))
         return FileType::Error;
 
     u16 machine = 0;
-    file.Seek(18, SEEK_SET);
-    if (1 != file.ReadArray<u16>(&machine, 1))
+    if (2 != file->ReadObject(&machine, 18))
         return FileType::Error;
 
     if (Common::MakeMagic('\x7f', 'E', 'L', 'F') == magic && ELF_MACHINE_ARM == machine)
@@ -391,20 +388,13 @@ ResultStatus AppLoader_ELF::Load(Kernel::SharedPtr<Kernel::Process>& process) {
     if (is_loaded)
         return ResultStatus::ErrorAlreadyLoaded;
 
-    if (!file.IsOpen())
-        return ResultStatus::Error;
-
-    // Reset read pointer in case this file has been read before.
-    file.Seek(0, SEEK_SET);
-
-    size_t size = file.GetSize();
-    std::unique_ptr<u8[]> buffer(new u8[size]);
-    if (file.ReadBytes(&buffer[0], size) != size)
+    std::vector<u8> buffer = file->ReadAllBytes();
+    if (buffer.size() != file->GetSize())
         return ResultStatus::Error;
 
     ElfReader elf_reader(&buffer[0]);
     SharedPtr<CodeSet> codeset = elf_reader.LoadInto(Memory::PROCESS_IMAGE_VADDR);
-    codeset->name = filename;
+    codeset->name = file->GetName();
 
     process->LoadModule(codeset, codeset->entrypoint);
     process->svc_access_mask.set();