string_conversions.h

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#ifndef STRING_CONVERSIONS_GROUP
#define STRING_CONVERSIONS_GROUP

/*****************************************************************************\
*                                                                             *
*  Name   : string_conversions                                                *
*  Author : Various                                                           *
*                                                                             *
*******************************************************************************
* Copyright (c) 2007-$now By Author.  This program is free software; you can  *
* redistribute it and/or modify it under the terms of the GNU General Public  *
* License as published by the Free Software Foundation; either version 2 of   *
* the License or (at your option) any later version.  This is online at:      *
*     http://www.fsf.org/copyleft/gpl.html                                    *
* Please send any updates to: fred@gruntose.com                               *
\*****************************************************************************/


using namespace System;
using namespace System::Collections;

#include <basis/istring.h>

namespace hoople_api {

  public ref class string_conversions
  {
  public:

      static void convert(const String ^to_convert, istring &result) {
        result.reset();
        if (const_cast<String ^>(to_convert)->Length > 0) {
          // transcode the internal string down to utf8.
          cli::array<Byte> ^bytes = System::Text::Encoding::UTF8->GetBytes
              (const_cast<String ^>(to_convert));
          pin_ptr<const byte> value = &bytes[0];  // trap the memory for a sec.
          result = (const char *)value;
          value = nullptr;  // deallocate what we had pinned.
        }
      }

      static void convert(const istring &to_convert, String ^ %result) {
        result = nullptr;  // shake loose anything stored already.
        result = gcnew String(to_convert.observe());
      }

      // functional methods return the object of the type specified.
      // this is not as efficient as the procedural form above, but this
      // form lends itself to a functional programming style better.

      static istring to_istring(const String ^to_convert) {
        istring to_return;
        convert(to_convert, to_return);
        return to_return;
      }

      static String ^ to_mstring(const istring &to_convert) {
        String ^ to_return;
        convert(to_convert, to_return);
        return to_return;
      }
  };
}

#endif

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