scheme_toplevel.c

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/* gEDA - GPL Electronic Design Automation
 * libgeda - gEDA's library - Scheme API
 * Copyright (C) 2010-2012 Peter Brett <peter@peter-b.co.uk>
 *
 * 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 program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111 USA
 */

#include <config.h>

#include "libgeda_priv.h"
#include "libgedaguile_priv.h"

SCM scheme_toplevel_fluid = SCM_UNDEFINED;

void
edascm_dynwind_toplevel (TOPLEVEL *toplevel)
{
  SCM s_toplevel = edascm_from_toplevel (toplevel);

  scm_dynwind_fluid (scheme_toplevel_fluid, s_toplevel);
}

SCM_DEFINE (edascm_current_toplevel, "%current-toplevel", 0, 0, 0,
            (),
            "Get the TOPLEVEL for the current dynamic context.")
{
  return scm_fluid_ref (scheme_toplevel_fluid);
}

TOPLEVEL *
edascm_c_current_toplevel ()
{
  SCM s_toplevel = edascm_current_toplevel ();

  EDASCM_ASSERT_SMOB_VALID(s_toplevel);

  return (TOPLEVEL *) SCM_SMOB_DATA (s_toplevel);
}

SCM_DEFINE (edascm_with_toplevel, "%with-toplevel", 2, 0, 0,
            (SCM toplevel, SCM thunk),
            "Call `thunk', setting the TOPLEVEL fluid to `toplevel'.")
{
  return scm_with_fluid (scheme_toplevel_fluid, toplevel, thunk);
}

SCM
edascm_c_with_toplevel (TOPLEVEL *toplevel, SCM (*func)(void *),
                        void *user_data)
{
  SCM s_toplevel = edascm_from_toplevel (toplevel);
  return scm_c_with_fluid (scheme_toplevel_fluid, s_toplevel, func, user_data);
}

static void
init_module_geda_core_toplevel ()
{
  /* Register the functions */
  #include "scheme_toplevel.x"

  /* Add them to the module's public definitions. */
  scm_c_export (s_edascm_with_toplevel, s_edascm_current_toplevel, NULL);
}

void
edascm_init_toplevel ()
{
  scheme_toplevel_fluid = scm_permanent_object (scm_make_fluid ());

  /* Define the (geda core toplevel) module */
  scm_c_define_module ("geda core toplevel",
                       init_module_geda_core_toplevel,
                       NULL);
}