Add methods to add C functions, enums, structs and unions

[tamdaz]

Description

Generate C libs where it is possible to add functions, structs, enums and unions.

Code generation

libc_type = Crygen::Types::LibC.new("C")
libc_type.add_function("getch", "Int32")
libc_type.add_function("time", "Int32")
libc_type.add_function("getpid", "Int32")
libc_type.add_struct("TimeZone", [
  {"field_one", "Int32"},
  {"field_two", "Int32"},
])
libc_type.add_struct("DateTime", [
  {"timestamp", "Int64"},
])
libc_type.add_union("IntOrFloat", [
  {"some_int", "Int32"},
  {"some_float", "Float64"},
])
libc_type.add_union("CharOrString", [
  {"some_char", "Char"},
  {"some_string", "String"},
])

puts libc_type.generate

Code output

lib C
  struct TimeZone
    field_one : Int32
    field_two : Int32
  end

  struct DateTime
    timestamp : Int64
  end

  union IntOrFloat
    some_int : Int32
    some_float : Float64
  end

  union CharOrString
    some_char : Char
    some_string : String
  end

  fun getch : Int32
  fun time : Int32
  fun getpid : Int32
end