vfs_vector: Add VFS backend for std::array

Allows using constexpr/static const data with VFS.
This commit is contained in:
Zach Hilman 2018-11-15 22:33:52 -05:00
parent 2c6efda235
commit 34cd56980f

View File

@ -8,6 +8,58 @@
namespace FileSys {
// An implementation of VfsFile that is backed by a statically-sized array
template <std::size_t size>
class ArrayVfsFile : public VfsFile {
public:
ArrayVfsFile(std::array<u8, size> data, std::string name = "", VirtualDir parent = nullptr)
: data(std::move(data)), name(std::move(name)), parent(std::move(parent)) {}
std::string GetName() const override {
return name;
}
std::size_t GetSize() const override {
return size;
}
bool Resize(std::size_t new_size) override {
return false;
}
std::shared_ptr<VfsDirectory> GetContainingDirectory() const override {
return parent;
}
bool IsWritable() const override {
return false;
}
bool IsReadable() const override {
return true;
}
std::size_t Read(u8* data_, std::size_t length, std::size_t offset) const override {
const auto read = std::min(length, size - offset);
std::memcpy(data_, data.data() + offset, read);
return read;
}
std::size_t Write(const u8* data, std::size_t length, std::size_t offset) override {
return 0;
}
bool Rename(std::string_view name) override {
this->name = name;
return true;
}
private:
std::array<u8, size> data;
std::string name;
VirtualDir parent;
};
// An implementation of VfsFile that is backed by a vector optionally supplied upon construction
class VectorVfsFile : public VfsFile {
public: