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+/*=============================================================================*\
+ * File: pd_state.c
+ * Author: Bryan Jurish <moocow@ling.uni-potsdam.de>
+ * Description: finite state automata for Pd
+ *
+ * Copyright (c) 2004 Bryan Jurish.
+ *
+ * For information on usage and redistribution, and for a DISCLAIMER OF ALL
+ * WARRANTIES, see the file, "LICENSE.txt," in this distribution.
+ *
+ * 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.
+ *
+ * See file LICENSE for further informations on licensing terms.
+ *
+ * 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 02111-1307, USA.
+ *=============================================================================*/
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <pd_state.h>
+
+/*=====================================================================
+ * Structures and Types
+ *=====================================================================*/
+static t_class *pd_gfsm_state_class;
+
+
+/*=====================================================================
+ * pd_gfsm_state: Methods
+ *=====================================================================*/
+
+/*=====================================================================
+ * Constructors, etc.
+ */
+
+/*--------------------------------------------------------------------
+ * new()
+ */
+static void *pd_gfsm_state_new(t_symbol *sel, int argc, t_atom *argv)
+{
+ t_symbol *name = &s_;
+ t_pd_gfsm_state *x = (t_pd_gfsm_state *)pd_new(pd_gfsm_state_class);
+
+ //-- defaults
+ x->x_id = gfsmNoState;
+ gfsm_arciter_close(&x->x_arci);
+ x->x_open = FALSE;
+
+ //-- args
+ if (argc > 0) {
+ name = atom_getsymbolarg(0,argc,argv);
+ if (argc > 1) x->x_id = (gfsmStateId)atom_getfloatarg(1,argc,argv);
+ }
+
+ //-- bindings
+ x->x_automaton_pd = pd_gfsm_automaton_pd_get(name);
+ x->x_automaton_pd->x_refcnt++;
+
+ //-- outlets
+ x->x_valout = outlet_new(&x->x_obj, &s_anything); //-- value outlet
+
+ return (void *)x;
+}
+
+/*--------------------------------------------------------------------
+ * free
+ */
+static void pd_gfsm_state_free(t_pd_gfsm_state *x)
+{
+ gfsm_arciter_close(&x->x_arci);
+ pd_gfsm_automaton_pd_release(x->x_automaton_pd);
+
+ //-- do we need to do this?
+ outlet_free(x->x_valout);
+}
+
+/*=====================================================================
+ * Basic Accessors
+ */
+
+/*--------------------------------------------------------------------
+ * automaton
+ */
+static void pd_gfsm_state_automaton(t_pd_gfsm_state *x, t_symbol *name)
+{
+ gfsm_arciter_close(&x->x_arci);
+ x->x_open = FALSE;
+
+ if (name == x->x_automaton_pd->x_name) return;
+ pd_gfsm_automaton_pd_release(x->x_automaton_pd);
+
+ x->x_automaton_pd = pd_gfsm_automaton_pd_get(name);
+ ++x->x_automaton_pd->x_refcnt;
+}
+
+
+/*--------------------------------------------------------------------
+ * id
+ */
+static void pd_gfsm_state_id(t_pd_gfsm_state *x)
+{
+ SETSYMBOL(x->x_argv, gensym("id"));
+ if (x->x_id==gfsmNoState) SETSYMBOL(x->x_argv, &s_bang);
+ else SETFLOAT(x->x_argv, (t_float)(x->x_id));
+ outlet_anything(x->x_valout, gensym("id"), 1, x->x_argv);
+}
+
+/*--------------------------------------------------------------------
+ * set
+ */
+static void pd_gfsm_state_set(t_pd_gfsm_state *x, t_floatarg qf)
+{
+ if (qf<0) qf = -qf;
+ gfsm_arciter_close(&x->x_arci);
+ x->x_open = FALSE;
+ x->x_id = gfsm_automaton_ensure_state(x->x_automaton_pd->x_automaton, (gfsmStateId)qf);
+}
+
+/*--------------------------------------------------------------------
+ * degree
+ */
+static void pd_gfsm_state_degree(t_pd_gfsm_state *x)
+{
+ gfsmState *s = gfsm_automaton_find_state(x->x_automaton_pd->x_automaton, x->x_id);
+ SETFLOAT(x->x_argv, (s ? (t_float)gfsm_state_out_degree(s) : 0));
+ outlet_anything(x->x_valout, gensym("degree"), 1, x->x_argv);
+}
+
+/*=====================================================================
+ * Navigation
+ */
+
+/*--------------------------------------------------------------------
+ * utility: outlet_arc()
+ */
+static void pd_gfsm_state_outlet_arc(t_pd_gfsm_state *x, t_symbol *sel)
+{
+ //outlet_anything(x->x_opout, op, 0, NULL);
+ if (gfsm_arciter_ok(&x->x_arci)) {
+ gfsmArc *a = gfsm_arciter_arc(&x->x_arci);
+ SETFLOAT(x->x_argv, (t_float)(a->target));
+ SETFLOAT(x->x_argv+1, (t_float)(a->lower));
+ SETFLOAT(x->x_argv+2, (t_float)(a->upper));
+ SETFLOAT(x->x_argv+3, (t_float)(a->weight));
+ outlet_anything(x->x_valout, sel, 4, x->x_argv);
+ }
+ else {
+ SETSYMBOL(x->x_argv, &s_bang);
+ outlet_anything(x->x_valout, sel, 1, x->x_argv);
+ }
+}
+
+/*--------------------------------------------------------------------
+ * arc_first
+ */
+static void pd_gfsm_state_arc_first(t_pd_gfsm_state *x)
+{
+ gfsm_arciter_close(&x->x_arci);
+ gfsm_arciter_open(&x->x_arci, x->x_automaton_pd->x_automaton, x->x_id);
+ x->x_open = TRUE;
+ pd_gfsm_state_outlet_arc(x, gensym("arc_first"));
+}
+
+/*--------------------------------------------------------------------
+ * arc_next
+ */
+static void pd_gfsm_state_arc_next(t_pd_gfsm_state *x)
+{
+ gfsmState *s = gfsm_automaton_find_state(x->x_automaton_pd->x_automaton, x->x_id);
+ if (s) {
+ if (x->x_open && gfsm_arciter_ok(&x->x_arci)) {
+ gfsm_arciter_next(&x->x_arci);
+ } else if (!x->x_open) {
+ gfsm_arciter_open(&x->x_arci, x->x_automaton_pd->x_automaton, x->x_id);
+ x->x_open = TRUE;
+ }
+ }
+ pd_gfsm_state_outlet_arc(x, gensym("arc_next"));
+}
+
+/*--------------------------------------------------------------------
+ * arc_seek
+ */
+static void pd_gfsm_state_arc_seek(t_pd_gfsm_state *x, t_float flo, t_float fhi)
+{
+ gfsmState *s = gfsm_automaton_find_state(x->x_automaton_pd->x_automaton, x->x_id);
+ if (s) {
+ if (x->x_open && gfsm_arciter_ok(&x->x_arci)) {
+ gfsm_arciter_next(&x->x_arci);
+ } else if (!x->x_open) {
+ gfsm_arciter_open(&x->x_arci, x->x_automaton_pd->x_automaton, x->x_id);
+ x->x_open = TRUE;
+ }
+ }
+ gfsm_arciter_seek_both(&x->x_arci,
+ (flo < 0 ? gfsmNoLabel : ((gfsmLabelVal)flo)),
+ (fhi < 0 ? gfsmNoLabel : ((gfsmLabelVal)fhi)));
+ pd_gfsm_state_outlet_arc(x, gensym("arc_seek"));
+}
+
+
+/*--------------------------------------------------------------------
+ * arc_reset
+ */
+static void pd_gfsm_state_arc_reset(t_pd_gfsm_state *x)
+{
+ gfsm_arciter_close(&x->x_arci);
+ x->x_open = FALSE;
+}
+
+/*--------------------------------------------------------------------
+ * add_weight
+ */
+static void pd_gfsm_state_add_weight(t_pd_gfsm_state *x,
+ t_float fto,
+ t_float flo,
+ t_float fhi,
+ t_float w)
+{
+ gfsmStateId to = (fto < 0 ? (-fto) : ((gfsmStateId)fto));
+ gfsmLabelVal lo = (flo < 0 ? gfsmNoLabel : ((gfsmLabelVal)flo));
+ gfsmLabelVal hi = (fhi < 0 ? gfsmNoLabel : ((gfsmLabelVal)fhi));
+
+ if (x->x_open) pd_gfsm_state_arc_reset(x);
+
+ gfsm_arciter_open(&x->x_arci, x->x_automaton_pd->x_automaton, x->x_id);
+ gfsm_arciter_seek_both(&x->x_arci, lo, hi);
+
+ if (gfsm_arciter_ok(&x->x_arci)) {
+ gfsm_arciter_arc(&x->x_arci)->weight += w;
+ } else {
+ if (lo==gfsmNoLabel) lo = gfsmEpsilon;
+ if (hi==gfsmNoLabel) hi = gfsmEpsilon;
+ gfsm_automaton_add_arc(x->x_automaton_pd->x_automaton, x->x_id, to, lo, hi, w);
+ }
+
+ pd_gfsm_state_arc_reset(x);
+}
+
+
+
+/*=====================================================================
+ * Setup
+ */
+
+/*--------------------------------------------------------------------
+ * setup()
+ */
+void pd_gfsm_state_setup(void)
+{
+ //-- class
+ pd_gfsm_state_class = class_new(gensym("gfsm_state"),
+ (t_newmethod)pd_gfsm_state_new,
+ (t_method)pd_gfsm_state_free,
+ sizeof(t_pd_gfsm_state),
+ CLASS_DEFAULT,
+ A_GIMME, A_NULL);
+
+ //-- methods: automaton
+ class_addmethod(pd_gfsm_state_class,
+ (t_method)pd_gfsm_state_automaton,
+ gensym("automaton"),
+ A_DEFSYM, A_NULL);
+
+ //-- methods: id
+ class_addmethod(pd_gfsm_state_class, (t_method)pd_gfsm_state_id,
+ gensym("id"), A_NULL);
+ class_addmethod(pd_gfsm_state_class, (t_method)pd_gfsm_state_set,
+ gensym("set"), A_DEFFLOAT, A_NULL);
+
+ //-- methods: degree
+ class_addmethod(pd_gfsm_state_class, (t_method)pd_gfsm_state_degree,
+ gensym("degree"), A_NULL);
+
+ //-- methods: navigation
+ class_addmethod(pd_gfsm_state_class, (t_method)pd_gfsm_state_arc_first,
+ gensym("arc_first"), A_NULL);
+ class_addmethod(pd_gfsm_state_class, (t_method)pd_gfsm_state_arc_next,
+ gensym("arc_next"), A_NULL);
+ class_addmethod(pd_gfsm_state_class, (t_method)pd_gfsm_state_arc_seek,
+ gensym("arc_seek"), A_FLOAT, A_FLOAT, A_NULL);
+ class_addmethod(pd_gfsm_state_class, (t_method)pd_gfsm_state_arc_reset,
+ gensym("arc_reset"), A_NULL);
+
+ //-- methods: manipulation
+ class_addmethod(pd_gfsm_state_class, (t_method)pd_gfsm_state_add_weight,
+ gensym("add_weight"), A_FLOAT, A_FLOAT, A_FLOAT, A_FLOAT, A_NULL);
+
+ //-- help symbol
+ class_sethelpsymbol(pd_gfsm_state_class, gensym("gfsm_state-help.pd"));
+}
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