/*

Copyright (C) 1996-2019 John W. Eaton

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 <stdlib.h>
#include <string.h>

#include "f77-fcn.h"
#include "quit.h"
#include "lo-error.h"

/* All the STOP statements in the Fortran routines have been replaced
   with a call to XSTOPX.

   XSTOPX calls the liboctave error handler.  In the Octave interpreter
   we set this to a function that throws an exception and transfers
   control to the enclosing try/catch block.  That is typically at the
   top-level REPL.  */

F77_RET_T
F77_FUNC (xstopx, XSTOPX) (F77_CONST_CHAR_ARG_DEF (s_arg, len)
                           F77_CHAR_ARG_LEN_DEF (len))
{
  const char *s = F77_CHAR_ARG_USE (s_arg);
  size_t slen = F77_CHAR_ARG_LEN_USE (s_arg, len);

  /* Skip printing message if it is just a single blank character.  */
  if (! (s && slen > 0 && ! (slen == 1 && *s == ' ')))
    {
      s = "unknown error in fortran subroutine";
      slen = strlen (s);
    }

  (*current_liboctave_error_handler) ("%.*s", (int) slen, s);

  F77_NORETURN (0)
}
