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.



23
24
25
26
 
# 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.



8
9
10
 
# 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



67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
 
# 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 



14
15
16
17
18
19
20
21
 
# 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 



28
29
30
 
# File 'lib/ProDOSDisk.rb', line 28

def file_system
	:prodos
end

#last_block ⇒ Object

what is the last block on this disk?



11
12
13
 
# File 'lib/ProDOSDisk.rb', line 11

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

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



89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
 
# 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