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Implement reading from RomFS

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wheremyfoodat 2022-10-09 18:28:45 +03:00
parent 272cdefca1
commit df4cd0642d
10 changed files with 157 additions and 33 deletions
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16
include/fs/archive_base.hpp
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@ -44,6 +44,18 @@ struct FSPath {
u32 pointer; // Pointer to the actual path data
};
class ArchiveBase;
struct FileSession {
ArchiveBase* archive = nullptr;
FSPath path;
bool isOpen;
FileSession(ArchiveBase* archive, const FSPath& filePath, bool isOpen = true) : archive(archive), isOpen(isOpen) {
path = filePath;
}
};
class ArchiveBase {
protected:
using Result = u32;
@ -56,6 +68,10 @@ public:
virtual bool openFile(const FSPath& path) = 0;
virtual ArchiveBase* openArchive(FSPath& path) = 0;
// Read size bytes from a file starting at offset "offset" into a certain buffer in memory
// Returns the number of bytes read, or nullopt if the read failed
virtual std::optional<u32> readFile(FileSession* file, u64 offset, u32 size, u32 dataPointer) = 0;
ArchiveBase(Memory& mem) : mem(mem) {}
};

22
include/fs/archive_ncch.hpp
View file

@ -4,25 +4,11 @@ class SelfNCCHArchive : public ArchiveBase {
public:
SelfNCCHArchive(Memory& mem) : ArchiveBase(mem) {}
u64 getFreeBytes() override { return 0; }
const char* name() override { return "SelfNCCH"; }
bool openFile(const FSPath& path) override {
if (path.type != PathType::Binary) {
printf("Invalid SelfNCCH path type");
return false;
}
return true;
}
ArchiveBase* openArchive(FSPath& path) override {
if (path.type != PathType::Empty) {
printf("Invalid path type for SelfNCCH archive: %d\n", path.type);
return nullptr;
}
return this;
}
bool openFile(const FSPath& path) override;
ArchiveBase* openArchive(FSPath& path) override;
std::optional<u32> readFile(FileSession* file, u64 offset, u32 size, u32 dataPointer) override;
};