Class: ProDOSDisk

Inherits:
DSK
  • Object
show all
Defined in:
lib/ProDOSDisk.rb

Overview

for now, assumes 'ProDOS order'

Constant Summary

Constants inherited from DSK

DSK::DSK_FILE_LENGTH, DSK::DSK_IMAGE_EXTENSIONS, DSK::FILE_SYSTEMS, DSK::INTERLEAVES, DSK::NIB_FILE_LENGTH, DSK::SECTOR_ORDERS

Instance Attribute Summary collapse

Attributes inherited from DSK

#file_bytes, #sector_order, #source_filename, #track_count

Instance Method Summary collapse

Methods inherited from DSK

#add_file, #best_subclass, create_new, #delete_file, #disassemble_sector, #dump_sector, #files, #free_sector_list, #get_block, #get_sector, #hex_dump, #is_cpm?, #is_dos33?, is_dsk_file?, #is_modified_dos?, #is_nadol?, #is_pascal?, #is_prodos?, #make_file, read, #save_as, #set_boot_track, #set_sector

Constructor Details

#initialize(file_bytes, sector_order) ⇒ ProDOSDisk

Returns a new instance of ProDOSDisk.



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# File 'lib/ProDOSDisk.rb', line 23

def initialize(file_bytes,sector_order)
  super(file_bytes,sector_order)
  self.read_catalog
end

Instance Attribute Details

#volume_name ⇒ Object

Returns the value of attribute volume_name.



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# File 'lib/ProDOSDisk.rb', line 8

def volume_name
  @volume_name
end

Instance Method Details

#dump_block(block_no) ⇒ Object

concatenate all the blocks in the volume directory Volume Directory format is: (from "Beneath Apple ProDOS pp 4-10 - 4-12) FOR VOLUMES $00 STORAGE_TYPE/NAME_LENGTH $01-$0F FILE_NAME $10 RESERVED $11-$12 RESERVED $13-$14 RESERVED $15-$17 RESERVED $18-$1B CREATION $1C VERSION $1D MIN_VERSION $1E ACCESS $1F ENTRY_LENGTH $20 ENTRIES_PER_BLOCK $21-$22 FILE_COUNT $23-$24 BIT_MAP_POINTER $25-$26 TOTAL_BLOCKS

FOR FILES $00 STORAGE_TYPE/NAME_LENGTH $01-$0F FILE_NAME $10 FILE_TYPE $11-$12 KEY_POINTER $13-$14 BLOCKS_USED $15-$17 EOF $18-$1B CREATION $1C VERSION $1D MIN_VERSION $1E ACCESS $1F-$20 AUX_TYPE $21-$24 LAST_MOD $25-$26 HEADER_POINTER



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# File 'lib/ProDOSDisk.rb', line 67

def dump_block(block_no)
  s=hline
  s<<sprintf("BLOCK %03d\n",block_no)
  s<< "\t"
  block_data=get_block(block_no)
  (0..15).each {|x| s<<sprintf("%02X ",x) }
  s<<"\n"
  s<<hline
  (0..31).each {|line_number|
     lhs=""
     rhs=""
     start_byte=line_number*16
     line=block_data[start_byte..start_byte+15]
     line.each_byte {|byte|
        lhs<< sprintf("%02X ", byte)
        rhs<< (byte%128).chr.sub(/[\x00-\x1f]/,'.')
     }
    s<<sprintf("%03X\t%s %s\n",start_byte,lhs,rhs)
  }
  s
end

#dump_catalog ⇒ Object 



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# File 'lib/ProDOSDisk.rb', line 14

def dump_catalog
  s=""
  files.keys.sort.each { |file_name|   
    file=files[file_name]
    s<< "#{sprintf('% 6d',file.contents.length)}\t #{file.file_type} : $#{sprintf '%X',file.aux_type}\t#{file_name}\n"
  }
  s
end

#file_system ⇒ Object 



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# File 'lib/ProDOSDisk.rb', line 28

def file_system
  :prodos
end

#last_block ⇒ Object

what is the last block on this disk?



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# File 'lib/ProDOSDisk.rb', line 11

def last_block
  (self.track_count*8)-1
end

#read_catalog(starting_block = 2, dir_path = "") ⇒ Object 



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# File 'lib/ProDOSDisk.rb', line 89

def read_catalog(starting_block=2,dir_path="")
  next_block_no=starting_block
  while (next_block_no!=0)
    block=get_block(next_block_no)
    offset=4
    while (offset<(0x200-0x27))
      directory_entry=block[offset..offset+0x27]
      storage_type=directory_entry[0]>>4
      name_length=directory_entry[0]%0x10
      name=directory_entry[1..name_length]
      file_type=directory_entry[0x10]
      key_pointer=directory_entry[0x11]+directory_entry[0x12]*0x100
      blocks_used=directory_entry[0x13]+directory_entry[0x14]*0x100
      file_length=directory_entry[0x15]+directory_entry[0x16]*0x100+directory_entry[0x17]*0x10000
      aux_type=directory_entry[0x1f]+directory_entry[0x20]*0x100
      case storage_type
        when 0x00 then
          #nop
        when 0x01 then  #it's a seedling
          file_contents=get_block(key_pointer)
          files[name]=ProDOSFile.new(name,file_contents,file_type,aux_type)
        when 0x02 then  #it's a sapling
          block_list=[]
          index_block=get_block(key_pointer)
          0.upto((file_length/0x200)) do |i|
            block_list<<index_block[i]+(index_block[i+0x100]*0x100)
          end
          file_contents=""
          block_list.each do |next_block_no|
            if next_block_no==0 then
              file_contents+="\x00"*0x200
            elsif next_block_no>self.last_block then
              STDERR<<"file #{name} attempted to read bad block # #{next_block_no}\n"
              file_contents+="\x00"*0x200
            else
              file_contents+=get_block(next_block_no)
            end
          end
          file_contents=file_contents[0..file_length-1]
          files["#{dir_path}#{name}"]=ProDOSFile.new(name,file_contents,file_type,aux_type)            
        when 0x03 then  #it's a tree
          master_index_block=get_block(key_pointer)
          block_list=[]
          number_of_index_entries=1+(file_length/0x200)
          number_of_index_blocks=1+(number_of_index_entries/0x100)
          number_of_index_entries_in_last_block=number_of_index_entries-(number_of_index_blocks-1)*0x100
          0.upto(number_of_index_blocks-1) do |i|
            index_block_no=master_index_block[i]+master_index_block[i+0x100]*0x100
            index_block=get_block(index_block_no)
            if i==number_of_index_blocks-1 then 
              entries_in_this_index_block=number_of_index_entries_in_last_block
            else 
              entries_in_this_index_block=256
            end
            0.upto(entries_in_this_index_block-1) do |j|
              block_list<<index_block[j]+(index_block[j+0x100]*0x100)
            end
          end
          file_contents=""
          block_list.each do |next_block_no|
            if next_block_no==0 then
              file_contents+="\x00"*0x200
            else
              file_contents+=get_block(next_block_no)
            end
          end
          file_contents=file_contents[0..file_length-1]
          files["#{dir_path}#{name}"]=ProDOSFile.new(name,file_contents,file_type,aux_type)            
        when 0x0D then  #it's a subdirectory pointer
          read_catalog(key_pointer,"#{dir_path}#{name}/")
        when 0x0E then  #it's a subdirectory header
          #do nothing 
        when 0x0F then  #it's a volume            
          @volume_name=name 
        else 
#           raise "unknown storage_type #{sprintf '%02X',storage_type}"
          puts "skipping unknown storage_type #{sprintf '%02X',storage_type} for #{dir_path}#{name}"
      end      
      offset+=0x27
    end
    next_block_no=block[2]+block[3]*256
  end
end