// Copyright Terence J. Boldt (c)2021-2022
// Use of this source code is governed by an MIT
// license that can be found in the LICENSE file.

// This file provides access to read and write
// blocks on a ProDOS drive image

package prodos

import (
	"io"
)

// ReadBlock reads a block from a ProDOS volume into a byte array
func ReadBlock(reader io.ReaderAt, block int) ([]byte, error) {
	buffer := make([]byte, 512)

	_, err := reader.ReadAt(buffer, int64(block)*512)

	return buffer, err
}

// WriteBlock writes a block to a ProDOS volume from a byte array
func WriteBlock(writer io.WriterAt, block int, buffer []byte) error {
	_, err := writer.WriteAt(buffer, int64(block)*512)
	return err
}
