Class: Mikunyan::TypeTree

Inherits:
Object
  • Object
show all
Defined in:
lib/mikunyan/type_tree.rb

Overview

Class for representing TypeTree

Defined Under Namespace

Classes: Node

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#nodes ⇒ Array<Mikunyan::TypeTree::Node>

list of all nodes

Returns:



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# File 'lib/mikunyan/type_tree.rb', line 9

def nodes
  @nodes
end

Class Method Details

.deserialize(obj) ⇒ Object

Creates TypeTree from serialized object

Parameters:

  • obj (Hash) 


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# File 'lib/mikunyan/type_tree.rb', line 126

def self.deserialize(obj)
  stack = []
  ret = TypeTree.new
  ret.nodes = obj['nodes'].map.with_index do |e, index|
    level = e['level'] || e['depth']
    parent = level > 0 ? stack[level - 1] : nil
    n = Node.new(
      version: e['version'],
      level: level,
      array?: e['is_array'],
      type: e['type'],
      name: e['name'],
      size: e['size'],
      index: index,
      flags: e['flags'],
      v18meta: e['v18meta'],
      parent: parent,
      children: []
    )
    parent.children << n if parent
    stack[level] = n
  end
  ret
end

.load(br, version) ⇒ Mikunyan::TypeTree

Creates TypeTree from binary string

Parameters:

Returns:



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# File 'lib/mikunyan/type_tree.rb', line 58

def self.load(br, version)
  if version == 10 || version >= 12
    node_count = br.i32u
    buffer_size = br.i32u
    nodes = Array.new(node_count) do
      Node.new(
        version: br.i16u,
        level: br.i8u,
        array?: br.bool,
        type: br.i32u,
        name: br.i32u,
        size: br.i32s,
        index: br.i32u,
        flags: br.i32u,
        v18meta: version >= 18 ? br.i64u : nil,
        children: []
      )
    end
    buffer = br.read(buffer_size)
    stack = []
    nodes.each do |n|
      n.type = Mikunyan::Constants.get_string_or_default(n.type, buffer)
      n.name = Mikunyan::Constants.get_string_or_default(n.name, buffer)
      if n.level > 0
        n.parent = stack[n.level - 1]
        n.parent.children << n
      end
      stack[n.level] = n
    end
  else
    nodes = []
    stack = []
    until stack.empty? && !nodes.empty?
      parent = stack.pop
      node = Node.new(
        type: br.cstr,
        name: br.cstr,
        size: br.i32s,
        index: br.i32u,
        array?: br.i32 != 0,
        version: br.i32u,
        flags: br.i32u,
        level: parent ? parent.level + 1 : 0,
        parent: parent,
        children: []
      )
      nodes << node
      parent.children << node if parent
      stack += Array.new(br.i32u, node)
    end
  end
  ret = TypeTree.new
  ret.nodes = nodes
  ret
end

.load_default(class_id, hash) ⇒ Mikunyan::TypeTree?

Create default TypeTree from hash string (if exists)

Parameters:

  • class_id (Integer)
  • hash (String)

Returns:



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# File 'lib/mikunyan/type_tree.rb', line 118

def self.load_default(class_id, hash)
  file = File.expand_path("../typetrees/#{class_id}/#{hash.unpack1('H*')}.json", __FILE__)
  return nil unless File.file?(file)
  TypeTree.deserialize(JSON.parse(File.read(file)))
end

Instance Method Details

#serialize ⇒ Object

Generates JSON-compatible serialized representation of typetree information



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# File 'lib/mikunyan/type_tree.rb', line 36

def serialize
  {
    'nodes' =>
      nodes.map do |e|
        {
          'version' => e.version,
          'level' => e.level,
          'is_array' => e.array?,
          'type' => e.type,
          'name' => e.name,
          'size' => e.size,
          'flags' => e.flags,
          'v18meta' => e.v18meta
        }
      end
  }
end

#tree ⇒ Mikunyan::TypeTree::Node?

Returns the root node of the typetree

Returns:



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# File 'lib/mikunyan/type_tree.rb', line 31

def tree
  nodes&.[](0)
end