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https://github.com/tjboldt/ProDOS-Utilities.git
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Initial commit with directory read
This commit is contained in:
Terence Boldt
parent
4348f912e4
commit
6fd22018e3
@ -1 +1,2 @@
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# ProDOS-Utilities
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# ProDOS-Utilities
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This project is just starting. It will eventually be a library in Golang to read and write files on a ProDOS hard drive image plus a command line interface. So far it is an experiment.
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42
main.go
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42
main.go
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package main
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import (
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"fmt"
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"os"
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"github.com/tjboldt/ProDOS-Utilities/prodos"
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)
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func main() {
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if len(os.Args) < 2 || len(os.Args) > 3 {
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fmt.Printf("Usage:")
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fmt.Printf(" ProDOS-Utilities DRIVE_IMAGE")
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fmt.Printf(" ProDOS-Utilities DRIVE_IMAGE /FULL_PATH")
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}
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fileName := os.Args[1]
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pathName := ""
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if len(os.Args) == 3 {
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pathName = os.Args[2]
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}
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// empty path or volume name means read root directory
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volumeHeader, fileEntries := prodos.ReadDirectory(fileName, pathName)
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fmt.Printf("VOLUME: %s\n\n", volumeHeader.VolumeName)
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fmt.Printf("NAME TYPE BLOCKS MODIFIED CREATED ENDFILE SUBTYPE\n\n")
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for i := 0; i < len(fileEntries); i++ {
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fmt.Printf("%-15s %s %7d %s %s %8d %8d\n",
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fileEntries[i].FileName,
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prodos.FileTypeToString(fileEntries[i].FileType),
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fileEntries[i].BlocksUsed,
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prodos.TimeToString(fileEntries[i].ModifiedTime),
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prodos.TimeToString(fileEntries[i].CreationTime),
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fileEntries[i].EndOfFile,
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fileEntries[i].AuxType,
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)
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}
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fmt.Printf("\n")
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}
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195
prodos/directory.go
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195
prodos/directory.go
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package prodos
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import (
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"fmt"
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"os"
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"strings"
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"time"
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)
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type VolumeHeader struct {
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VolumeName string
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CreationTime time.Time
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ActiveFileCount int
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BitmapStartBlock int
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TotalBlocks int
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NextBlock int
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EntryLength int
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EntriesPerBlock int
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}
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type DirectoryHeader struct {
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Name string
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ActiveFileCount int
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NextBlock int
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}
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const (
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StorageDeleted = 0
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StorageSeedling = 1
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StorageSapling = 2
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StorageTree = 3
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StoragePascal = 4
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StorageDirectory = 13
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)
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type FileEntry struct {
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StorageType int
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FileName string
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FileType int
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CreationTime time.Time
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StartingBlock int
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BlocksUsed int
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EndOfFile int
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Access int
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AuxType int
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ModifiedTime time.Time
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}
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func ReadDirectory(driveFileName string, path string) (VolumeHeader, []FileEntry) {
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file, err := os.OpenFile(driveFileName, os.O_RDWR, 0755)
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if err != nil {
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return VolumeHeader{}, nil
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}
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buffer := ReadBlock(file, 2)
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volumeHeader := ParseVolumeHeader(buffer)
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//dumpVolumeHeader(volumeHeader)
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if len(path) == 0 {
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path = fmt.Sprintf("/%s", volumeHeader.VolumeName)
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}
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path = strings.ToUpper(path)
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paths := strings.Split(path, "/")
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fileEntries := getFileEntriesInDirectory(file, 2, 1, paths)
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return volumeHeader, fileEntries
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}
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func getFileEntriesInDirectory(file *os.File, blockNumber int, currentPath int, paths []string) []FileEntry {
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//fmt.Printf("Parsing '%s'...\n", paths[currentPath])
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buffer := ReadBlock(file, blockNumber)
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directoryHeader := ParseDirectoryHeader(buffer)
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fileEntries := make([]FileEntry, directoryHeader.ActiveFileCount)
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entryOffset := 43 // start at offset after header
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activeEntries := 0
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entryNumber := 2 // header is essentially the first entry so start at 2
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nextBlock := directoryHeader.NextBlock
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matchedDirectory := (currentPath == len(paths)-1) && (paths[currentPath] == directoryHeader.Name)
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if !matchedDirectory && (currentPath == len(paths)-1) {
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// path not matched by last path part
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return nil
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}
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for {
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if entryNumber > 13 {
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entryOffset = 4
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entryNumber = 1
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if blockNumber == 0 {
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return nil
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}
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buffer = ReadBlock(file, nextBlock)
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nextBlock = int(buffer[2]) + int(buffer[3])*256
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}
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fileEntry := parseFileEntry(buffer[entryOffset : entryOffset+40])
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//DumpFileEntry(fileEntry)
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if fileEntry.StorageType != StorageDeleted {
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if matchedDirectory {
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fileEntries[activeEntries] = fileEntry
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} else if !matchedDirectory && fileEntry.FileType == 15 && paths[currentPath+1] == fileEntry.FileName {
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return getFileEntriesInDirectory(file, fileEntry.StartingBlock, currentPath+1, paths)
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}
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activeEntries++
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if matchedDirectory && activeEntries == directoryHeader.ActiveFileCount {
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return fileEntries[0:activeEntries]
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}
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}
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entryNumber++
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entryOffset += 39
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}
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}
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func parseFileEntry(buffer []byte) FileEntry {
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storageType := int(buffer[0] >> 4)
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fileNameLength := int(buffer[0] & 15)
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fileName := string(buffer[1 : fileNameLength+1])
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fileType := int(buffer[16])
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startingBlock := int(buffer[17]) + int(buffer[18])*256
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blocksUsed := int(buffer[19]) + int(buffer[20])*256
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endOfFile := int(buffer[21]) + int(buffer[22])*256 + int(buffer[23])*65536
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creationTime := DateTimeFromProDOS(buffer[24:28])
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access := int(buffer[30])
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auxType := int(buffer[31]) + int(buffer[32])*256
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modifiedTime := DateTimeFromProDOS((buffer[33:37]))
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fileEntry := FileEntry{
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StorageType: storageType,
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FileName: fileName,
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FileType: fileType,
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CreationTime: creationTime,
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StartingBlock: startingBlock,
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BlocksUsed: blocksUsed,
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EndOfFile: endOfFile,
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Access: access,
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AuxType: auxType,
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ModifiedTime: modifiedTime,
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}
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return fileEntry
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}
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func ParseVolumeHeader(buffer []byte) VolumeHeader {
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nextBlock := int(buffer[2]) + int(buffer[3])*256
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filenameLength := buffer[4] & 15
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volumeName := string(buffer[5 : filenameLength+5])
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creationTime := DateTimeFromProDOS(buffer[28:32])
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version := int(buffer[32])
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minVersion := int(buffer[33])
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entryLength := int(buffer[35])
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entriesPerBlock := int(buffer[36])
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fileCount := int(buffer[37]) + int(buffer[38])*256
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bitmapBlock := int(buffer[39]) + int(buffer[40])*256
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totalBlocks := int(buffer[41]) + int(buffer[42])*256
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if version > 0 || minVersion > 0 {
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panic("Unsupported ProDOS version")
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}
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volumeHeader := VolumeHeader{
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VolumeName: volumeName,
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CreationTime: creationTime,
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ActiveFileCount: fileCount,
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BitmapStartBlock: bitmapBlock,
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TotalBlocks: totalBlocks,
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NextBlock: nextBlock,
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EntriesPerBlock: entriesPerBlock,
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EntryLength: entryLength,
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}
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return volumeHeader
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}
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func ParseDirectoryHeader(buffer []byte) DirectoryHeader {
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nextBlock := int(buffer[2]) + int(buffer[3])*256
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filenameLength := buffer[4] & 15
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name := string(buffer[5 : filenameLength+5])
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fileCount := int(buffer[37]) + int(buffer[38])*256
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directoryEntry := DirectoryHeader{
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NextBlock: nextBlock,
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Name: name,
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ActiveFileCount: fileCount,
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}
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return directoryEntry
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}
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20
prodos/dumpBlock.go
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20
prodos/dumpBlock.go
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package prodos
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import "fmt"
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func DumpBlock(buffer []byte) {
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for i := 0; i < len(buffer); i += 16 {
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for j := i; j < i+16; j++ {
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fmt.Printf("%02X ", buffer[j])
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}
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for j := i; j < i+16; j++ {
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c := buffer[j] & 127
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if c >= 32 {
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fmt.Printf("%c", c)
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} else {
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fmt.Printf(".")
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}
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}
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fmt.Printf("\n")
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}
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}
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15
prodos/readblock.go
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15
prodos/readblock.go
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package prodos
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import (
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"os"
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)
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func ReadBlock(file *os.File, block int) []byte {
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buffer := make([]byte, 512)
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//fmt.Printf("Read block %d\n", block)
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file.ReadAt(buffer, int64(block)*512)
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return buffer
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}
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105
prodos/text.go
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105
prodos/text.go
Normal file
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package prodos
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import (
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"fmt"
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"strings"
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"time"
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)
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func TimeToString(printTime time.Time) string {
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return fmt.Sprintf("%04d-%s-%02d %02d:%02d",
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printTime.Year(),
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strings.ToUpper(printTime.Month().String()[0:3]),
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printTime.Day(),
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printTime.Hour(),
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printTime.Minute(),
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)
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}
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func FileTypeToString(fileType int) string {
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switch fileType {
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case 1:
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return "BAD"
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case 4:
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return "TXT"
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case 6:
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return "BIN"
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case 7:
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return "FNT"
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case 15:
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return "DIR"
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case 252:
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return "BAS"
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case 253:
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return "VAR"
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case 255:
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return "SYS"
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default:
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return fmt.Sprintf("$%02X", fileType)
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}
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/*
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File Type Preferred Use
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$00 Typeless file (SOS and ProDOS)
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$01 Bad block file
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$02 * Pascal code file
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$03 * Pascal text file
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$04 ASCII text file (SOS and ProDOS)
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$05 * Pascal data file
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$06 General binary file (SOS and ProDOS)
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$07 * Font file
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$08 Graphics screen file
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$09 * Business BASIC program file
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$0A * Business BASIC data file
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$0B * Word Processor file
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$0C * SOS system file
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$0D,$0E * SOS reserved
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$0F Directory file (SOS and ProDOS)
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$10 * RPS data file
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$11 * RPS index file
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$12 * AppleFile discard file
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$13 * AppleFile model file
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$14 * AppleFile report format file
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$15 * Screen Library file
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$16-$18 * SOS reserved
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$19 AppleWorks Data Base file
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$1A AppleWorks Word Processor file
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$1B AppleWorks Spreadsheet file
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$1C-$EE Reserved
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$EF Pascal area
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$F0 ProDOS CI added command file
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$F1-$F8 ProDOS user defined files 1-8
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$F9 ProDOS reserved
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$FA Integer BASIC program file
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$FB Integer BASIC variable file
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$FC Applesoft program file
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$FD Applesoft variables file
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$FE Relocatable code file (EDASM)
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$FF ProDOS system file
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*/
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}
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func DumpFileEntry(fileEntry FileEntry) {
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fmt.Printf("FileName: %s\n", fileEntry.FileName)
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fmt.Printf("Creation time: %d-%s-%d %02d:%02d\n", fileEntry.CreationTime.Year(), fileEntry.CreationTime.Month(), fileEntry.CreationTime.Day(), fileEntry.CreationTime.Hour(), fileEntry.CreationTime.Minute())
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fmt.Printf("Modified time: %d-%s-%d %02d:%02d\n", fileEntry.ModifiedTime.Year(), fileEntry.ModifiedTime.Month(), fileEntry.ModifiedTime.Day(), fileEntry.ModifiedTime.Hour(), fileEntry.ModifiedTime.Minute())
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fmt.Printf("AuxType: %04X\n", fileEntry.AuxType)
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fmt.Printf("EOF: %06X\n", fileEntry.EndOfFile)
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fmt.Printf("Blocks used: %04X\n", fileEntry.BlocksUsed)
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fmt.Printf("Starting block: %04X\n", fileEntry.StartingBlock)
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fmt.Printf("File type: %02X\n", fileEntry.FileType)
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fmt.Printf("Storage type: %02X\n", fileEntry.StorageType)
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fmt.Printf("\n")
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}
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func dumpVolumeHeader(volumeHeader VolumeHeader) {
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fmt.Printf("Next block: %d\n", volumeHeader.NextBlock)
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fmt.Printf("Volume name: %s\n", volumeHeader.VolumeName)
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fmt.Printf("Creation time: %d-%s-%d %02d:%02d\n", volumeHeader.CreationTime.Year(), volumeHeader.CreationTime.Month(), volumeHeader.CreationTime.Day(), volumeHeader.CreationTime.Hour(), volumeHeader.CreationTime.Minute())
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// fmt.Printf("ProDOS version (should be 0): %d\n", volumeHeader.Version)
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// fmt.Printf("ProDOS mininum version (should be 0): %d\n", minVersion)
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fmt.Printf("Entry length (should be 39): %d\n", volumeHeader.EntryLength)
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fmt.Printf("Entries per block (should be 13): %d\n", volumeHeader.EntriesPerBlock)
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fmt.Printf("File count: %d\n", volumeHeader.ActiveFileCount)
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fmt.Printf("Bitmap starting block: %d\n", volumeHeader.BitmapStartBlock)
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fmt.Printf("Total blocks: %d\n", volumeHeader.TotalBlocks)
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}
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58
prodos/time.go
Normal file
58
prodos/time.go
Normal file
@ -0,0 +1,58 @@
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package prodos
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import (
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"fmt"
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"time"
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)
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/* 49041 ($BF91) 49040 ($BF90)
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7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
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+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+
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DATE: | year | month | day |
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+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+
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7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
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+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+
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TIME: | hour | | minute |
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+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+
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49043 ($BF93) 49042 ($BF92)
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*/
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func DateTimeToProDOS(dateTime time.Time) []byte {
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fmt.Printf("Sending date/time...\n")
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year := dateTime.Year() % 100
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month := dateTime.Month()
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day := dateTime.Day()
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hour := dateTime.Hour()
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minute := dateTime.Minute()
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buffer := make([]byte, 4)
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buffer[0] = ((byte(month) & 15) << 5) + byte(day)
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buffer[1] = (byte(year) << 1) + (byte(month) >> 3)
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buffer[2] = byte(minute)
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buffer[3] = byte(hour)
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return buffer
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}
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func DateTimeFromProDOS(buffer []byte) time.Time {
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twoDigitYear := buffer[1] >> 1
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var year int
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if twoDigitYear < 76 {
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year = 2000 + int(twoDigitYear)
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} else {
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year = 1900 + int(twoDigitYear)
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}
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month := int(buffer[0]>>5 + buffer[1]&1)
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day := int(buffer[0] & 23)
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hour := int(buffer[3])
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minute := int(buffer[2])
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parsedTime := time.Date(year, time.Month(month), day, hour, minute, 0, 0, time.Local)
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return parsedTime
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}
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15
prodos/writeBlock.go
Normal file
15
prodos/writeBlock.go
Normal file
@ -0,0 +1,15 @@
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package prodos
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import (
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"fmt"
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"os"
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)
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func WriteBlock(file *os.File, block int, buffer []byte) {
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fmt.Printf("Write block %d\n", block)
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file.WriteAt(buffer, int64(block)*512)
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file.Sync()
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fmt.Printf("Write block completed\n")
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}
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