Class fstream

src/fl/stl/fstream.h:299–400

// ============================================================================

class fstream {
private:
    filebuf_ptr mHandle;
    fl::size_t mLastRead;
    bool mGood;
    bool mEof;
    bool mFail;
    int mLocalError;

    void updateState() {
        if (mHandle && mHandle->is_open()) {
            mEof = mHandle->is_eof();
            mFail = mHandle->has_error() || (mLocalError != 0);
            mGood = !mEof && !mFail;
        } else {
            mGood = false;
            mEof = false;
            mFail = true;
        }
    }

public:
    fstream() FL_NOEXCEPT : mLastRead(0), mGood(false), mEof(false), mFail(true), mLocalError(0) {}

    explicit fstream(const char* path, ios::openmode mode = ios::in | ios::out);

    explicit fstream(filebuf_ptr handle);

    ~fstream() FL_NOEXCEPT;

    // Non-copyable
    fstream(const fstream&) FL_NOEXCEPT = delete;
    fstream& operator=(const fstream&) = delete;

    // Moveable
    fstream(fstream&& other) FL_NOEXCEPT
        : mHandle(other.mHandle), mLastRead(other.mLastRead),
          mGood(other.mGood), mEof(other.mEof), mFail(other.mFail),
          mLocalError(other.mLocalError) {
        other.mHandle.reset();
        other.mLastRead = 0;
        other.mGood = false;
        other.mEof = false;
        other.mFail = true;
        other.mLocalError = 0;
    }

    fstream& operator=(fstream&& other) FL_NOEXCEPT {
        if (this != &other) {
            close();
            mHandle = other.mHandle;
            mLastRead = other.mLastRead;
            mGood = other.mGood;
            mEof = other.mEof;
            mFail = other.mFail;
            mLocalError = other.mLocalError;
            other.mHandle.reset();
            other.mLastRead = 0;