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file_sys: handle null romfs

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This commit is contained in:
Liam 2023-12-01 23:39:48 -05:00
parent e9a43bae6f
commit 45b6161582
5 changed files with 17 additions and 21 deletions
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21
src/core/file_sys/romfs.cpp
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@ -3,6 +3,7 @@
#include <memory>
#include "common/assert.h"
#include "common/common_types.h"
#include "common/string_util.h"
#include "common/swap.h"
@ -101,24 +102,30 @@ void ProcessDirectory(const VirtualFile& file, std::size_t dir_offset, std::size
} // Anonymous namespace
VirtualDir ExtractRomFS(VirtualFile file) {
RomFSHeader header{};
if (file->ReadObject(&header) != sizeof(RomFSHeader))
return nullptr;
auto root_container = std::make_shared<VectorVfsDirectory>();
if (!file) {
return root_container;
}
if (header.header_size != sizeof(RomFSHeader))
return nullptr;
RomFSHeader header{};
if (file->ReadObject(&header) != sizeof(RomFSHeader)) {
return root_container;
}
if (header.header_size != sizeof(RomFSHeader)) {
return root_container;
}
const u64 file_offset = header.file_meta.offset;
const u64 dir_offset = header.directory_meta.offset;
auto root_container = std::make_shared<VectorVfsDirectory>();
ProcessDirectory(file, dir_offset, file_offset, header.data_offset, 0, root_container);
if (auto root = root_container->GetSubdirectory(""); root) {
return std::make_shared<CachedVfsDirectory>(std::move(root));
}
ASSERT(false);
return nullptr;
}