text: // Protocol Buffers - Google's data interchange format
  // Copyright 2008 Google Inc.  All rights reserved.
  // https://developers.google.com/protocol-buffers/
  //
  // 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 Google Inc. 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 THE COPYRIGHT
  // OWNER OR CONTRIBUTORS 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.
  
  #ifndef RUBY_PROTOBUF_CONVERT_H_
  #define RUBY_PROTOBUF_CONVERT_H_
  
  #include <ruby/ruby.h>
  
  #include "protobuf.h"
  #include "ruby-upb.h"
  
  // Converts |ruby_val| to a upb_msgval according to |type_info|.
  //
  // The |arena| parameter indicates the lifetime of the container where this
  // value will be assigned. It is used as follows:
  // - If type is string or bytes, the string data will be copied into |arena|.
  // - If type is message, and we need to auto-construct a message due to implicit
  //   conversions (eg. Time -> Google::Protobuf::Timestamp), the new message
  //   will be created in |arena|.
  // - If type is message and the Ruby value is a message instance, we will fuse
  //   the message's arena into |arena|, to ensure that this message outlives the
  //   container.
  upb_msgval Convert_RubyToUpb(VALUE ruby_val, const char *name,
                               TypeInfo type_info, upb_arena *arena);
  
  // Converts |upb_val| to a Ruby VALUE according to |type_info|. This may involve
  // creating a Ruby wrapper object.
  //
  // The |arena| parameter indicates the arena that owns the lifetime of
  // |upb_val|. Any Ruby wrapper object that is created will reference |arena|
  // and ensure it outlives the wrapper.
  VALUE Convert_UpbToRuby(upb_msgval upb_val, TypeInfo type_info, VALUE arena);
  
  // Creates a deep copy of |msgval| in |arena|.
  upb_msgval Msgval_DeepCopy(upb_msgval msgval, TypeInfo type_info,
                             upb_arena *arena);
  
  // Returns true if |val1| and |val2| are equal. Their type is given by
  // |type_info|.
  bool Msgval_IsEqual(upb_msgval val1, upb_msgval val2, TypeInfo type_info);
  
  // Returns a hash value for the given upb_msgval.
  uint64_t Msgval_GetHash(upb_msgval val, TypeInfo type_info, uint64_t seed);
  
  #endif  // RUBY_PROTOBUF_CONVERT_H_
  