////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2012-2022 The Octave Project Developers
//
// See the file COPYRIGHT.md in the top-level directory of this
// distribution or <https://octave.org/copyright/>.
//
// This file is part of Octave.
//
// Octave 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 3 of the License, or
// (at your option) any later version.
//
// Octave is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Octave; see the file COPYING.  If not, see
// <https://www.gnu.org/licenses/>.
//
////////////////////////////////////////////////////////////////////////

#if defined (HAVE_CONFIG_H)
#  include "config.h"
#endif

#include <algorithm>

#include "Array.h"
#include "base64-wrappers.h"
#include "oct-base64.h"

namespace octave
{
  bool
  base64_encode (const char *inc, const std::size_t inlen, char **out)
  {
    bool ret = false;

    std::ptrdiff_t outlen = octave_base64_encode_alloc_wrapper (inc, inlen, out);

    if (! out)
      {
        if (outlen == 0 && inlen != 0)
          (*current_liboctave_error_handler)
            ("base64_encode: input array too large");
        else
          (*current_liboctave_error_handler)
            ("base64_encode: memory allocation error");
      }
    else
      ret = true;

    return ret;
  }

  Array<double>
  base64_decode (const std::string& str)
  {
    Array<double> retval;

    double *out;
    std::ptrdiff_t outlen;

    bool ok
      = octave_base64_decode_alloc_wrapper (str.data (), str.length (),
                                            reinterpret_cast<char **> (&out),
                                            &outlen);

    if (! ok)
      (*current_liboctave_error_handler)
        ("base64_decode: input was not valid base64");

    if (! out)
      (*current_liboctave_error_handler)
        ("base64_decode: memory allocation error");

    if ((outlen % (sizeof (double) / sizeof (char))) != 0)
      {
        ::free (out);
        (*current_liboctave_error_handler)
          ("base64_decode: incorrect input size");
      }
    else
      {
        octave_idx_type len = (outlen * sizeof (char)) / sizeof (double);
        retval.resize (dim_vector (1, len));
        std::copy (out, out + len, retval.fortran_vec ());
        ::free (out);
      }

    return retval;
  }

  intNDArray<octave_uint8>
  base64_decode_bytes (const std::string& str)
  {
    intNDArray<octave_uint8> retval;

    char *out;
    std::ptrdiff_t outlen;

    bool ok
      = octave_base64_decode_alloc_wrapper (str.data (), str.length (),
                                            &out, &outlen);

    if (! ok)
      (*current_liboctave_error_handler)
        ("base64_decode: input was not valid base64");

    if (! out)
      (*current_liboctave_error_handler)
        ("base64_decode: memory allocation error");

    retval.resize (dim_vector (1, outlen));
    std::copy (out, out + outlen, retval.fortran_vec ());
    ::free (out);

    return retval;
  }
}
