Class: Bayonetta::EFFFile::Directory

Inherits:
Object
  • Object
show all
Includes:
Alignment, Bayonetta::Endianness
Defined in:
lib/bayonetta/eff.rb

Constant Summary collapse

EXTENSIONS = 
{
  "TEX\0".b => "wtb",
  "MOD\0".b => "dat"
}
ALIGNMENT = 
{
  "TEX\0".b => 0x1000,
  "MOD\0".b => 0x1000,
  "EST\0".b => 0x10,
  "IDT\0".b => 0x10
}
KNOWN_DIRECTORIES = 
[
  "SAD\0".b,
  "SST\0".b,
  "TUV\0".b,
  "TEX\0".b,
  "MOD\0".b,
  "EST\0".b
]
KNOWN_STRUCTURE = 
[
  "TEX\0".b,
  "MOD\0".b,
  "EST\0".b,
  "IDT\0".b
]
UNKNOWN_STRUCTURE = 
KNOWN_DIRECTORIES - KNOWN_STRUCTURE

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(f, big) ⇒ Directory

Returns a new instance of Directory.



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# File 'lib/bayonetta/eff.rb', line 47

def initialize(f, big)
  @big = big
  if f
    @name = f.read(4)
    case @name
    when *UNKNOWN_STRUCTURE
      f.rewind
      @file_number = 1
      @file_infos = [[0, 0, f.size]]
      @files = [f]
    when *KNOWN_STRUCTURE
      uint = get_uint
      @file_number = f.read(4).unpack(uint).first
      @file_infos = @file_number.times.collect { |i|
        f.read(8).unpack("#{uint}2")
      }
      sorted_file_infos = @file_infos.sort { |e1, e2| e1[1] <=> e2[1] }
      sorted_file_infos.each_with_index { |info, i|
        id, offset = info
        if sorted_file_infos[i+1]
          size = sorted_file_infos[i+1][1] - offset
        else
          size = f.size - offset
        end
        info.push(size)
      }
      @files = @file_infos.collect { |id, offset, size|
        f.seek(offset)
        of = StringIO::new( f.read(size), "rb")
      }
    else
      raise "Unknown directory type: #{@name}!"
    end
    @extname = EXTENSIONS[@name]
    @extname = @name.delete("\x00").downcase unless @extname
  else
    @name = nil
    @file_number = 0
    @file_infos = []
    @files = []
  end
end

Instance Attribute Details

#big ⇒ Object (readonly)

Returns the value of attribute big.



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# File 'lib/bayonetta/eff.rb', line 17

def big
  @big
end

#file_infos ⇒ Object

Returns the value of attribute file_infos.



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# File 'lib/bayonetta/eff.rb', line 15

def file_infos
  @file_infos
end

#file_number ⇒ Object

Returns the value of attribute file_number.



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# File 'lib/bayonetta/eff.rb', line 14

def file_number
  @file_number
end

#files ⇒ Object

Returns the value of attribute files.



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# File 'lib/bayonetta/eff.rb', line 16

def files
  @files
end

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/bayonetta/eff.rb', line 18

def name
  @name
end

Instance Method Details

#compute_layout ⇒ Object 



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# File 'lib/bayonetta/eff.rb', line 119

def compute_layout
  case @name
  when *UNKNOWN_STRUCTURE
    raise "Unsupported file number #{@file_number}!" unless @file_number == 1
    @file_infos[0][1] = 0x0
    @file_infos[0][2]
  when *KNOWN_STRUCTURE
    current_offset = align(4 + 4 + @file_infos.length * 8, ALIGNMENT[@name])
    @file_infos = @file_infos.collect { |id, _, size|
      ret = [id, current_offset, size]
      current_offset += size
      current_offset = align(current_offset, ALIGNMENT[@name])
      ret
    }
    current_offset
  else
    raise "Invalid directory #{@name}!"
  end
end

#each ⇒ Object 



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# File 'lib/bayonetta/eff.rb', line 90

def each
  if block_given?
    @file_number.times { |i|
      yield ("%010d." % @file_infos[i][0])+@extname, @files[i]
    }
  else
    to_enum(:each)
  end
end

#push(id, f) ⇒ Object 



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# File 'lib/bayonetta/eff.rb', line 100

def push(id, f)
  f.rewind
  sz = f.size
  of = StringIO::new( f.read, "rb")
  @file_number += 1
  @files.push of
  @file_infos.push [id, nil, sz]
  self
end

#size ⇒ Object 



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# File 'lib/bayonetta/eff.rb', line 139

def size
  compute_layout
end

#to_stringio ⇒ Object 



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# File 'lib/bayonetta/eff.rb', line 143

def to_stringio
  total_size = compute_layout
  str = StringIO::new("\x00".b*total_size, "w+b")
  str.rewind

  case @name
  when *UNKNOWN_STRUCTURE
    f = @files[0]
    f.rewind
    str.write f.read
    f.rewind
  when *KNOWN_STRUCTURE
    uint = get_uint
    str.write @name
    str.write [@file_number].pack(uint)
    @file_infos.each { |id, offset, _|
      str.write [id, offset].pack("#{uint}*")
    }
    @file_number.times { |i|
      str.seek(@file_infos[i][1])
      f = @files[i]
      f.rewind
      str.write f.read
      f.rewind
    }
  end
  str.rewind
  str.close_write
  str
end