Class: FFI::Generator::Parser

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

Class Method Summary collapse

Class Method Details

.generate(node) ⇒ Object 



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# File 'lib/generator/generator.rb', line 307

def generate(node)
  result = ""
  node.traverse do |node|
    if is_constant?(node)
      result << Constant.new(:node => node, :indent => @indent).to_s << "\n"
    elsif is_typedef?(node)
      typedef = Typedef.new(:node => node)
      Generator.add_type(typedef.symname, typedef.statement)
      if is_callback?(node)
        cb = Callback.new(:node => node, :indent => @indent).to_s << "\n"
        Generator.add_type(typedef.symname, ":#{typedef.symname}")
        result << cb.to_s
      end
    elsif is_enum?(node)
      e = Enum.new(:node => node, :indent => @indent)
      Generator.add_type(e.symname, Generator::TYPES['int'])
      result << e.to_s << "\n"
    elsif is_struct?(node)
      s = Structure.new(:node => node, :indent => @indent)
      Generator.add_type(s.symname, "struct #{s.symname}")
      result << s.to_s
    elsif is_union?(node)
      s = Union.new(:node => node, :indent => @indent)
      Generator.add_type(s.symname, "union #{s.symname}")
      result << s.to_s
    elsif is_function_decl?(node)
      result << Function.new(:node => node, :indent => @indent).to_s << "\n"
    elsif node.name == 'insert' and not is_insert_runtime?(node)
      result << get_verbatim(node)
    end       
  end
  result
end

.get_verbatim(node) ⇒ Object 



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# File 'lib/generator/generator.rb', line 279

def get_verbatim(node)
  node.xpath("./attributelist/attribute[@name='code']").first['value']
end

.is_callback?(node) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/generator/generator.rb', line 304

def is_callback?(node)
  (node / "./attributelist/attribute[@name='decl']").first['value'] =~ /^p\.f\(/
end

.is_constant?(node) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/generator/generator.rb', line 286

def is_constant?(node)
  node.name == 'constant'
end

.is_enum?(node) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/generator/generator.rb', line 289

def is_enum?(node)
  node.name == 'enum'
end

.is_function_decl?(node) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/generator/generator.rb', line 292

def is_function_decl?(node)
  node.name == 'cdecl' and (node / "./attributelist/attribute[@name='kind']").first['value'] == 'function'
end

.is_insert_runtime?(node) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/generator/generator.rb', line 282

def is_insert_runtime?(node)
  section = node.xpath("./attributelist/attribute[@name='section']")
  section.first['value'] == 'runtime' if section.first
end

.is_struct?(node) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/generator/generator.rb', line 295

def is_struct?(node)
  node.name == 'class' and (node / "./attributelist/attribute[@name='kind']").first['value'] == 'struct'
end

.is_typedef?(node) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/generator/generator.rb', line 301

def is_typedef?(node)
  node.name == 'cdecl' and (node / "./attributelist/attribute[@name='kind']").first['value'] == 'typedef'
end

.is_union?(node) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/generator/generator.rb', line 298

def is_union?(node)
  node.name == 'class' and (node / "./attributelist/attribute[@name='kind']").first['value'] == 'union'
end