////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 1993-2022 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 (octave_utils_h)
#define octave_utils_h 1

#include "octave-config.h"

#include <cstdarg>

#include <iosfwd>
#include <string>
#include <list>

#include "dMatrix.h"
#include "lo-utils.h"

class octave_value;
class octave_value_list;
class string_vector;

OCTAVE_NAMESPACE_BEGIN

  extern OCTINTERP_API bool valid_identifier (const char *s);
  extern OCTINTERP_API bool valid_identifier (const std::string& s);

  //! Helper class for `make_valid_name` function calls.
  //!
  //! Extracting options separately for multiple (e.g. 1000+) function calls
  //! avoids expensive repetitive parsing of the very same options.

  class
  OCTINTERP_API
  make_valid_name_options
  {
  public:

    //! Default options for `make_valid_name` function calls.
    //!
    //! Calling the constructor without arguments is equivalent to:
    //!
    //! @code{.cc}
    //! make_valid_name_options (ovl ("ReplacementStyle", "underscore",
    //!                               "Prefix", "x"));
    //! @endcode

    make_valid_name_options () = default;

    //! Extract attribute-value-pairs from an octave_value_list of strings.
    //!
    //! If attributes occur multiple times, the rightmost pair is chosen.
    //!
    //! @code{.cc}
    //! make_valid_name_options (ovl ("ReplacementStyle", "hex", ...));
    //! @endcode

    make_valid_name_options (const octave_value_list& args);

    //! @return ReplacementStyle, see `help matlab.lang.makeValidName`.

    const std::string&
    get_replacement_style () const { return m_replacement_style; }

    //! @return Prefix, see `help matlab.lang.makeValidName`.

    const std::string& get_prefix () const { return m_prefix; }

  private:

    std::string m_replacement_style{"underscore"};
    std::string m_prefix{"x"};
  };

  //! Modify @p str to be a valid variable name.
  //!
  //! @param str input string
  //! @param options see also `help matlab.lang.makeValidName`.
  //!
  //! @return true, if @p str was modified.

  extern OCTINTERP_API bool
  make_valid_name (std::string& str, const make_valid_name_options& options);

  extern OCTINTERP_API bool
  same_file (const std::string& f, const std::string& g);

  extern OCTINTERP_API int almost_match (const std::string& std,
                                         const std::string& s,
                                         int min_match_len = 1,
                                         int case_sens = 1);

  extern OCTINTERP_API int
  keyword_almost_match (const char * const *std, int *min_len,
                        const std::string& s, int min_toks_to_match,
                        int max_toks);

  extern OCTINTERP_API std::string
  search_path_for_file (const std::string&, const string_vector&);

  extern OCTINTERP_API string_vector
  search_path_for_all_files (const std::string&, const string_vector&);

  extern OCTINTERP_API std::string
  file_in_path (const std::string&, const std::string&);

  extern OCTINTERP_API std::string
  find_data_file_in_load_path  (const std::string& fcn,
                                const std::string& file,
                                bool require_regular_file = false);

  extern OCTINTERP_API std::string contents_file_in_path (const std::string&);

  extern OCTINTERP_API std::string fcn_file_in_path (const std::string&);

  extern OCTINTERP_API std::string do_string_escapes (const std::string& s);

  extern OCTINTERP_API const char * undo_string_escape (char c);

  extern OCTINTERP_API std::string undo_string_escapes (const std::string& s);

  extern OCTINTERP_API void
  check_dimensions (dim_vector& dim, const char *warnfor);

  extern OCTINTERP_API void
  get_dimensions (const octave_value& a, const char *warn_for,
                  dim_vector& dim);

  extern OCTINTERP_API void
  get_dimensions (const octave_value& a, const octave_value& b,
                  const char *warn_for, octave_idx_type& nr,
                  octave_idx_type& nc);

  extern OCTINTERP_API void
  get_dimensions (const octave_value& a, const char *warn_for,
                  octave_idx_type& nr, octave_idx_type& nc);

  extern OCTINTERP_API octave_idx_type
  dims_to_numel (const dim_vector& dims, const octave_value_list& idx);

  extern OCTINTERP_API Matrix
  identity_matrix (octave_idx_type nr, octave_idx_type nc);

  extern OCTINTERP_API FloatMatrix
  float_identity_matrix (octave_idx_type nr, octave_idx_type nc);

  extern OCTINTERP_API std::size_t
  format (std::ostream& os, const char *fmt, ...);

  extern OCTINTERP_API std::size_t
  vformat (std::ostream& os, const char *fmt, va_list args);

  extern OCTINTERP_API std::string
  vasprintf (const char *fmt, va_list args);

  extern OCTINTERP_API std::string asprintf (const char *fmt, ...);

  extern OCTINTERP_API void sleep (double seconds,
                                   bool do_graphics_events = false);

  extern OCTINTERP_API
  octave_value_list
  do_simple_cellfun (octave_value_list (*fcn) (const octave_value_list&, int),
                     const char *fcn_name, const octave_value_list& args,
                     int nargout);

  extern OCTINTERP_API
  octave_value
  do_simple_cellfun (octave_value_list (*fcn) (const octave_value_list&, int),
                     const char *fcn_name, const octave_value_list& args);

OCTAVE_NAMESPACE_END

#endif