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// Copyright (C) 2022 Luke Shumaker <lukeshu@lukeshu.com>
//
// SPDX-License-Identifier: GPL-2.0-or-later
package diskio
type statefulFile[A ~int64] struct {
inner File[A]
pos A
}
var _ File[assertAddr] = (*statefulFile[assertAddr])(nil)
func NewStatefulFile[A ~int64](file File[A]) *statefulFile[A] {
return &statefulFile[A]{
inner: file,
}
}
func (sf *statefulFile[A]) Name() string { return sf.inner.Name() }
func (sf *statefulFile[A]) Size() A { return sf.inner.Size() }
func (sf *statefulFile[A]) Close() error { return sf.inner.Close() }
func (sf *statefulFile[A]) ReadAt(dat []byte, off A) (int, error) { return sf.inner.ReadAt(dat, off) }
func (sf *statefulFile[A]) WriteAt(dat []byte, off A) (int, error) { return sf.inner.WriteAt(dat, off) }
func (sf *statefulFile[A]) Read(dat []byte) (n int, err error) {
n, err = sf.ReadAt(dat, sf.pos)
sf.pos += A(n)
return n, err
}
func (sf *statefulFile[A]) ReadByte() (byte, error) {
var dat [1]byte
_, err := sf.Read(dat[:])
return dat[0], err
}
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