gl.xml の型情報(<types>)から typedef 名 → Cの型名 の対応関係を作るスクリプト (*) https://cvs.khronos.org/svn/repos/ogl/trunk/doc/registry/public/api/gl.xml

extract_type.rb

# $ ruby extract_type.rb
# GLenum => unsigned int 
# GLboolean => unsigned char 
# GLbitfield => unsigned int 
# GLvoid => void 
# GLbyte => signed char 
# GLshort => short 
# GLint => int 
# GLclampx => int 
# GLubyte => unsigned char 
# GLushort => unsigned short 
# GLuint => unsigned int 
# ...

require 'nokogiri'

GLTypeMapEntry = Struct.new( :def_name, :ctype_name )
gl_type_map = []

doc = Nokogiri::XML(open("./gl.xml"))

doc.xpath('registry/types/type').each do |type_tag|
  # Skip stddef/khrplatform/inttypes to process actual GL types
  name_attr = type_tag['name']
  next if name_attr == 'stddef' || name_attr == 'khrplatform' || name_attr == 'inttypes'

  # Skip ES1/2 types
  api_attr = type_tag['api']
  if api_attr != nil
    next if api_attr == 'gles1' || api_attr == 'gles2'
  end

  # Analyze the content of <type>...</type>
  content = type_tag.text
  name_tag = type_tag.at('name')
  if name_tag != nil
    # ex.) <type>typedef float <name>GLfloat</name>;</type>
    def_name = name_tag.text # ex.) def_name <- GLfloat
    ctype_name = content.chomp(def_name + ';').sub('typedef ','') # ex.) ctype_name <- float
  else
    # The actual type of 'GLhandleARB' should be changed depending on your platform (#ifdef __APPLE__, ...)
    def_name = name_attr
    ctype_name = "Needs tweaking by hand..."
  end

  # Store the result into name -> ctype map
  map_entry = GLTypeMapEntry.new
  map_entry.def_name = def_name
  map_entry.ctype_name = ctype_name
  gl_type_map << map_entry
end

gl_type_map.each do |t|
  print "#{t.def_name} => #{t.ctype_name}\n"
end