Module: RBStarbound::SBAsset6

Defined in:
lib/rbstarbound/sbasset6.rb

Class Attribute Summary collapse

Class Method Summary collapse

Class Attribute Details

.file_count ⇒ Object (readonly)

Returns the value of attribute file_count.



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# File 'lib/rbstarbound/sbasset6.rb', line 58

def file_count
  @file_count
end

.index ⇒ Object (readonly)

Returns the value of attribute index.



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# File 'lib/rbstarbound/sbasset6.rb', line 58

def index
  @index
end

.index_offset ⇒ Object (readonly)

Returns the value of attribute index_offset.



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# File 'lib/rbstarbound/sbasset6.rb', line 58

def index_offset
  @index_offset
end

.metadata ⇒ Object (readonly)

Returns the value of attribute metadata.



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# File 'lib/rbstarbound/sbasset6.rb', line 58

def metadata
  @metadata
end

.metadata_offset ⇒ Object (readonly)

Returns the value of attribute metadata_offset.



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# File 'lib/rbstarbound/sbasset6.rb', line 58

def metadata_offset
  @metadata_offset
end

.verbose ⇒ Object

Returns the value of attribute verbose.



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# File 'lib/rbstarbound/sbasset6.rb', line 57

def verbose
  @verbose
end

Class Method Details

.get(path) ⇒ Object

Raises:



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# File 'lib/rbstarbound/sbasset6.rb', line 14

def self.get(path)
  raise SBAsset6Error, 'No package file given' if @package.nil?
  offset, length = @index[path]
  rewind_to(offset)
  @package.read(length)
end

.meta_header ⇒ Object 



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# File 'lib/rbstarbound/sbasset6.rb', line 52

def self.meta_header
  @package.read(5)
end

.package(io) ⇒ Object

Raises:



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# File 'lib/rbstarbound/sbasset6.rb', line 7

def self.package(io)
  @package = io
  raise SBAsset6Error, 'No package file given' if @package.nil?
  read_header
  read_index
end

.read_header ⇒ Object

Raises:



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# File 'lib/rbstarbound/sbasset6.rb', line 21

def self.read_header
  rewind_to(0)
  header, @metadata_offset = @package.read(16).unpack('A8Q>')
  raise SBAsset6Error, 'Invalid header' unless header == 'SBAsset6'
  read_metadata
end

.read_index ⇒ Object 



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# File 'lib/rbstarbound/sbasset6.rb', line 28

def self.read_index
  puts 'Loading index...' if @verbose
  rewind_to(@index_offset)
  @index = {}
  @file_count.times do
    path = RBStarbound::SBON.read_string(@package)
    offset, length = @package.read(16).unpack('Q>Q>')
    @index[path] = [offset, length]
  end
  puts 'Index loaded.' if @verbose
end

.read_metadata ⇒ Object

Raises:



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# File 'lib/rbstarbound/sbasset6.rb', line 40

def self.read_metadata
  rewind_to(@metadata_offset)
  raise SBAsset6Error, 'Invalid index data' unless meta_header == 'INDEX'
  @metadata = RBStarbound::SBON.read_map(@package)
  @file_count = RBStarbound::SBON.read_varint(@package)
  @index_offset = @package.pos
end

.rewind_to(pos) ⇒ Object 



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# File 'lib/rbstarbound/sbasset6.rb', line 48

def self.rewind_to(pos)
  @package.seek(pos, IO::SEEK_SET)
end