ProDOS-Utilities/prodos/host.go

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// Copyright Terence J. Boldt (c)2022-2023
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// Use of this source code is governed by an MIT
// license that can be found in the LICENSE file.
// This file provides access to generate a ProDOS drive image from a host directory
package prodos
import (
"encoding/binary"
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"errors"
"fmt"
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"os"
"path/filepath"
"strings"
"time"
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)
// AddFilesFromHostDirectory fills the root volume with files
// from the specified host directory
func AddFilesFromHostDirectory(
readerWriter ReaderWriterAt,
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directory string,
path string,
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recursive bool,
) error {
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path, err := makeFullPath(path, readerWriter)
if !strings.HasSuffix(path, "/") {
path = path + "/"
}
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files, err := os.ReadDir(directory)
if err != nil {
return err
}
for _, file := range files {
info, err := file.Info()
if err != nil {
return err
}
if file.Name()[0] != '.' && !file.IsDir() && info.Size() > 0 && info.Size() <= 0x1000000 {
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err = WriteFileFromFile(readerWriter, path, 0, 0, info.ModTime(), filepath.Join(directory, file.Name()), true)
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if err != nil {
return err
}
}
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if file.Name()[0] != '.' && recursive && file.IsDir() {
newPath := file.Name()
if len(newPath) > 15 {
newPath = newPath[0:15]
}
newFullPath := strings.ToUpper(path + newPath)
newHostDirectory := filepath.Join(directory, file.Name())
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err = CreateDirectory(readerWriter, newFullPath)
if err != nil {
return err
}
err = AddFilesFromHostDirectory(readerWriter, newHostDirectory, newFullPath+"/", recursive)
if err != nil {
return err
}
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}
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}
return nil
}
// WriteFileFromFile writes a file to a ProDOS volume from a host file
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func WriteFileFromFile(
readerWriter ReaderWriterAt,
pathName string,
fileType int,
auxType int,
modifiedTime time.Time,
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inFileName string,
ignoreDuplicates bool,
) error {
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inFile, err := os.ReadFile(inFileName)
if err != nil {
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errString := fmt.Sprintf("write from file failed: %s", err)
return errors.New(errString)
}
if auxType == 0 && fileType == 0 {
auxType, fileType, inFile, err = convertFileByType(inFileName, inFile)
if err != nil {
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errString := fmt.Sprintf("failed to convert file: %s", err)
return errors.New(errString)
}
}
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trimExtensions := false
if len(pathName) == 0 {
_, pathName = filepath.Split(inFileName)
pathName = strings.ToUpper(pathName)
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trimExtensions = true
}
if strings.HasSuffix(pathName, "/") {
trimExtensions = true
_, fileName := filepath.Split(inFileName)
pathName = strings.ToUpper(pathName + fileName)
}
if trimExtensions {
ext := filepath.Ext(pathName)
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if len(ext) > 0 {
switch ext {
case ".SYS", ".TXT", ".BAS", ".BIN":
pathName = strings.TrimSuffix(pathName, ext)
}
}
}
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paths := strings.SplitAfter(pathName, "/")
if len(paths[len(paths)-1]) > 15 {
paths[len(paths)-1] = paths[len(paths)-1][0:15]
pathName = strings.Join(paths, "")
}
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// skip if file already exists and ignoring duplicates
if ignoreDuplicates {
exists, err := FileExists(readerWriter, pathName)
if err != nil {
return err
}
if exists {
return nil
}
}
return WriteFile(readerWriter, pathName, fileType, auxType, time.Now(), modifiedTime, inFile)
}
func convertFileByType(inFileName string, inFile []byte) (int, int, []byte, error) {
fileType := 0x06 // default to BIN
auxType := 0x2000 // default to $2000
var err error
// Check for an AppleSingle file as produced by cc65
if // Magic number
binary.BigEndian.Uint32(inFile[0x00:]) == 0x00051600 &&
// Version number
binary.BigEndian.Uint32(inFile[0x04:]) == 0x00020000 &&
// Number of entries
binary.BigEndian.Uint16(inFile[0x18:]) == 0x0002 &&
// Data Fork ID
binary.BigEndian.Uint32(inFile[0x1A:]) == 0x00000001 &&
// Offset
binary.BigEndian.Uint32(inFile[0x1E:]) == 0x0000003A &&
// Length
binary.BigEndian.Uint32(inFile[0x22:]) == uint32(len(inFile))-0x3A &&
// ProDOS File Info ID
binary.BigEndian.Uint32(inFile[0x26:]) == 0x0000000B &&
// Offset
binary.BigEndian.Uint32(inFile[0x2A:]) == 0x00000032 &&
// Length
binary.BigEndian.Uint32(inFile[0x2E:]) == 0x00000008 {
fileType = int(binary.BigEndian.Uint16(inFile[0x34:]))
auxType = int(binary.BigEndian.Uint32(inFile[0x36:]))
inFile = inFile[0x3A:]
} else {
// use extension to determine file type
ext := strings.ToUpper(filepath.Ext(inFileName))
switch ext {
case ".BAS":
inFile, err = ConvertTextToBasic(string(inFile))
fileType = 0xFC
auxType = 0x0801
if err != nil {
return 0, 0, nil, err
}
case ".SYS":
fileType = 0xFF
auxType = 0x2000
case ".BIN":
fileType = 0x06
auxType = 0x2000
case ".TXT":
inFile = []byte(strings.ReplaceAll(strings.ReplaceAll(string(inFile), "\r\n", "r"), "\n", "\r"))
fileType = 0x04
auxType = 0x0000
case ".JPG", ".PNG":
inFile = ConvertImageToHiResMonochrome(inFile)
fileType = 0x06
auxType = 0x2000
}
}
return auxType, fileType, inFile, err
}