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/* Copyright (C) 2021 Nicolas Peugnet <n.peugnet@free.fr>
This file is part of dna-backup.
dna-backup is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
dna-backup is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with dna-backup. If not, see <https://www.gnu.org/licenses/>. */
package dna
import (
"io"
"github.com/n-peugnet/dna-backup/utils"
)
type writer struct {
*utils.WriteCounter
trackSize int
}
func NewWriter(w io.Writer, trackSize int) io.WriteCloser {
return &writer{
WriteCounter: utils.NewWriteCounter(w),
trackSize: trackSize,
}
}
func (d *writer) Close() (err error) {
// add padding for the last track
padding := make([]byte, d.trackSize-d.Count()%d.trackSize)
if _, err = d.Write(padding); err != nil {
return err
}
return nil
}
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