39 lines
975 B
Go
39 lines
975 B
Go
// Copyright Terence J. Boldt (c)2021-2023
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// Use of this source code is governed by an MIT
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// license that can be found in the LICENSE file.
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// This file provides access to read and write
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// blocks on a ProDOS drive image
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package prodos
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import (
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"errors"
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"fmt"
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"io"
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)
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// ReadBlock reads a block from a ProDOS volume into a byte array
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func ReadBlock(reader io.ReaderAt, block int) ([]byte, error) {
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buffer := make([]byte, 512)
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_, err := reader.ReadAt(buffer, int64(block)*512)
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if err != nil {
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errString := fmt.Sprintf("failed to read block %04X: %s", block, err.Error())
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err = errors.New(errString)
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}
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return buffer, err
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}
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// WriteBlock writes a block to a ProDOS volume from a byte array
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func WriteBlock(writer io.WriterAt, block int, buffer []byte) error {
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_, err := writer.WriteAt(buffer, int64(block)*512)
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if err != nil {
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errString := fmt.Sprintf("failed to write block %04X: %s", block, err.Error())
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err = errors.New(errString)
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}
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return err
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}
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