Class: Mapi::Pst::Desc64

Inherits:
Struct
  • Object
show all
Includes:
RecursivelyEnumerable
Defined in:
lib/mapi/pst.rb

Overview

pst_desc

Constant Summary collapse

UNPACK_STR = 
'T3VV'
SIZE = 
32
BLOCK_SIZE =

descriptor blocks was 520 but bogus

512
COUNT_MAX =

guess as per Index64

15

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(data) ⇒ Desc64

Returns a new instance of Desc64.



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# File 'lib/mapi/pst.rb', line 479

def initialize data
  super(*Pst.unpack(data, UNPACK_STR))
  @children = []
end

Instance Attribute Details

#children ⇒ Object (readonly)

Returns the value of attribute children.



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# File 'lib/mapi/pst.rb', line 478

def children
  @children
end

#desc_id ⇒ Object

Returns the value of attribute desc_id

Returns:

  • (Object) —

    the current value of desc_id



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# File 'lib/mapi/pst.rb', line 469

def desc_id
  @desc_id
end

#idx2_id ⇒ Object

Returns the value of attribute idx2_id

Returns:

  • (Object) —

    the current value of idx2_id



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# File 'lib/mapi/pst.rb', line 469

def idx2_id
  @idx2_id
end

#idx_id ⇒ Object

Returns the value of attribute idx_id

Returns:

  • (Object) —

    the current value of idx_id



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# File 'lib/mapi/pst.rb', line 469

def idx_id
  @idx_id
end

#parent_desc_id ⇒ Object

Returns the value of attribute parent_desc_id

Returns:

  • (Object) —

    the current value of parent_desc_id



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# File 'lib/mapi/pst.rb', line 469

def parent_desc_id
  @parent_desc_id
end

#pst ⇒ Object

Returns the value of attribute pst.



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# File 'lib/mapi/pst.rb', line 477

def pst
  @pst
end

#u2 ⇒ Object

Returns the value of attribute u2

Returns:

  • (Object) —

    the current value of u2



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# File 'lib/mapi/pst.rb', line 469

def u2
  @u2
end

Class Method Details

.load_chain(io, header) ⇒ Object 



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# File 'lib/mapi/pst.rb', line 492

def self.load_chain io, header
  load_desc_rec io, header.index2, 0, 0x21
end

.load_desc_rec(io, offset, linku1, start_val) ⇒ Object 



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# File 'lib/mapi/pst.rb', line 496

def self.load_desc_rec io, offset, linku1, start_val
  io.seek offset
  buf = io.read BLOCK_SIZE
  descs = []
  item_count = buf[ITEM_COUNT_OFFSET_64]

  # not real desc
  #desc = Desc.new buf[BACKLINK_OFFSET, 4]
  #raise 'blah 1' unless desc.desc_id == linku1

  if buf[LEVEL_INDICATOR_OFFSET_64] == 0
    # leaf pointers
    raise "have too many active items in index (#{item_count})" if item_count > COUNT_MAX
    # split the data into item_count desc objects
    buf[0, SIZE * item_count].scan(/.{#{SIZE}}/mo).each_with_index do |data, i|
      desc = new data
      # first entry
      raise 'blah 3' if i == 0 and start_val != 0 and desc.desc_id != start_val
      break if desc.desc_id == 0
      descs << desc
    end
  else
    # node pointers
    raise "have too many active items in index (#{item_count})" if item_count > Index64::COUNT_MAX
    # split the data into item_count table pointers
    buf[0, Index64::SIZE * item_count].scan(/.{#{Index64::SIZE}}/mo).each_with_index do |data, i|
      start, u1, offset = Pst.unpack data, 'T3'
      # for the first value, we expect the start to be equal note that ids -1, so even for the
      # first we expect it to be equal. thats the 0x21 (dec 33) desc record. this means we assert
      # that the first desc record is always 33...
      # thats because 0x21 is the pst root itself...
      raise 'blah 3' if i == 0 and start_val != -1 and start != start_val
      # this shouldn't really happen i'd imagine
      break if start == 0
      descs += load_desc_rec io, offset, u1, start
    end
  end

  descs
end

Instance Method Details

#desc ⇒ Object 



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# File 'lib/mapi/pst.rb', line 484

def desc
  pst.idx_from_id idx_id
end

#each_child(&block) ⇒ Object 



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# File 'lib/mapi/pst.rb', line 537

def each_child(&block)
  @children.each(&block)
end

#list_index ⇒ Object 



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# File 'lib/mapi/pst.rb', line 488

def list_index
  pst.idx_from_id idx2_id
end