// WriteAt writes p at the current offset+off, wrapping at Cap()
func (wpr *Wrapper) WriteAt(p []byte, off int64) (n int, err error) {
wrap := NewWrapWriter(wpr.rwa, wpr.O+off, wpr.N)
w := limio.LimitWriter(wrap, wpr.N-off)
n, err = w.Write(p)
if wpr.L < off+int64(n) {
wpr.L = int64(n) + off
}
return n, err
}
func (buf *memory) Write(p []byte) (n int, err error) {
return limio.LimitWriter(buf.Buffer, Gap(buf)).Write(p)
}