text: /*
   * Copyright (c) 2010, Wayne Meissner
   *
   * Copyright (c) 2008-2013, Ruby FFI project contributors
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *     * Redistributions of source code must retain the above copyright
   *       notice, this list of conditions and the following disclaimer.
   *     * Redistributions in binary form must reproduce the above copyright
   *       notice, this list of conditions and the following disclaimer in the
   *       documentation and/or other materials provided with the distribution.
   *     * Neither the name of the Ruby FFI project nor the
   *       names of its contributors may be used to endorse or promote products
   *       derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
   * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #include <ruby.h>
  
  #include <ffi.h>
  #include "rbffi.h"
  
  #include "Type.h"
  #include "MappedType.h"
  
  
  static VALUE mapped_allocate(VALUE);
  static VALUE mapped_initialize(VALUE, VALUE);
  static void mapped_mark(MappedType *);
  static ID id_native_type, id_to_native, id_from_native;
  
  VALUE rbffi_MappedTypeClass = Qnil;
  
  static VALUE
  mapped_allocate(VALUE klass)
  {
      MappedType* m;
  
      VALUE obj = Data_Make_Struct(klass, MappedType, mapped_mark, -1, m);
  
      m->rbConverter = Qnil;
      m->rbType = Qnil;
      m->type = NULL;
      m->base.nativeType = NATIVE_MAPPED;
      m->base.ffiType = &ffi_type_void;
      
      return obj;
  }
  
  /*
   * call-seq: initialize(converter)
   * @param [#native_type, #to_native, #from_native] converter +converter+ must respond to
   *  all these methods
   * @return [self]
   */
  static VALUE
  mapped_initialize(VALUE self, VALUE rbConverter)
  {
      MappedType* m = NULL;
      
      if (!rb_respond_to(rbConverter, id_native_type)) {
          rb_raise(rb_eNoMethodError, "native_type method not implemented");
      }
  
      if (!rb_respond_to(rbConverter, id_to_native)) {
          rb_raise(rb_eNoMethodError, "to_native method not implemented");
      }
  
      if (!rb_respond_to(rbConverter, id_from_native)) {
          rb_raise(rb_eNoMethodError, "from_native method not implemented");
      }
      
      Data_Get_Struct(self, MappedType, m);
      m->rbType = rb_funcall2(rbConverter, id_native_type, 0, NULL);
      if (!(rb_obj_is_kind_of(m->rbType, rbffi_TypeClass))) {
          rb_raise(rb_eTypeError, "native_type did not return instance of FFI::Type");
      }
  
      m->rbConverter = rbConverter;
      Data_Get_Struct(m->rbType, Type, m->type);
      m->base.ffiType = m->type->ffiType;
      
      return self;
  }
  
  static void
  mapped_mark(MappedType* m)
  {
      rb_gc_mark(m->rbType);
      rb_gc_mark(m->rbConverter);
  }
  
  /*
   * call-seq: mapped_type.native_type
   * @return [Type]
   * Get native type of mapped type.
   */
  static VALUE
  mapped_native_type(VALUE self)
  {
      MappedType*m = NULL;
      Data_Get_Struct(self, MappedType, m);
  
      return m->rbType;
  }
  
  /*
   * call-seq: mapped_type.to_native(*args)
   * @param args depends on {FFI::DataConverter} used to initialize +self+
   */
  static VALUE
  mapped_to_native(int argc, VALUE* argv, VALUE self)
  {
      MappedType*m = NULL;
      
      Data_Get_Struct(self, MappedType, m);
      
      return rb_funcall2(m->rbConverter, id_to_native, argc, argv);
  }
  
  /*
   * call-seq: mapped_type.from_native(*args)
   * @param args depends on {FFI::DataConverter} used to initialize +self+
   */
  static VALUE
  mapped_from_native(int argc, VALUE* argv, VALUE self)
  {
      MappedType*m = NULL;
      
      Data_Get_Struct(self, MappedType, m);
  
      return rb_funcall2(m->rbConverter, id_from_native, argc, argv);
  }
  
  void
  rbffi_MappedType_Init(VALUE moduleFFI)
  {
      /* 
       * Document-class: FFI::Type::Mapped < FFI::Type
       */
      rbffi_MappedTypeClass = rb_define_class_under(rbffi_TypeClass, "Mapped", rbffi_TypeClass);
      
      rb_global_variable(&rbffi_MappedTypeClass);
  
      id_native_type = rb_intern("native_type");
      id_to_native = rb_intern("to_native");
      id_from_native = rb_intern("from_native");
  
      rb_define_alloc_func(rbffi_MappedTypeClass, mapped_allocate);
      rb_define_method(rbffi_MappedTypeClass, "initialize", mapped_initialize, 1);
      rb_define_method(rbffi_MappedTypeClass, "type", mapped_native_type, 0);
      rb_define_method(rbffi_MappedTypeClass, "native_type", mapped_native_type, 0);
      rb_define_method(rbffi_MappedTypeClass, "to_native", mapped_to_native, -1);
      rb_define_method(rbffi_MappedTypeClass, "from_native", mapped_from_native, -1);
  }
  
  