1 files changed, 78 insertions, 0 deletions
diff --git a/alternate.c b/alternate.c
new file mode 100644
index 0000000..a2d7ed0
--- /dev/null
+++ b/alternate.c
@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 1997-1999 Mark Danks.
+ * For information on usage and redistribution, and for a DISCLAIMER OF ALL
+ * WARRANTIES, see the file, "GEM.LICENSE.TERMS" in this distribution.
+ */
+
+#include "m_pd.h"
+
+/* -------------------------- alternate ------------------------------ */
+
+/* instance structure */
+
+static t_class *alternate_class;
+
+typedef struct _alternate
+{
+	t_object    x_obj;	        /* obligatory object header */
+	int	        a_which;	    /* which outlet to go out 0 = left, 1 = right    */
+	t_outlet    *t_out1;	    /* the outlet */
+	t_outlet    *t_out2;	    /* the other outlet */
+} t_alternate;
+
+static void alternate_list(t_alternate *x, t_symbol *s, int argc, t_atom *argv)
+{
+	static t_symbol *listSym = NULL;
+
+	if (!listSym)
+		listSym = gensym("list");
+
+    if (!x->a_which) outlet_list(x->t_out1, listSym, argc, argv);
+    else outlet_list(x->t_out2, listSym, argc, argv);
+    x->a_which++;
+    x->a_which = (x->a_which > 1) ? 0 : x->a_which;
+}
+
+static void alternate_float(t_alternate *x, t_floatarg n)
+{
+    if (!x->a_which) outlet_float(x->t_out1, n);
+    else outlet_float(x->t_out2, n);
+    x->a_which++;
+    x->a_which = (x->a_which > 1) ? 0 : x->a_which;
+}
+
+static void alternate_bang(t_alternate *x)
+{
+	if (!x->a_which) outlet_bang(x->t_out1);
+	else outlet_bang(x->t_out2);
+	x->a_which++;
+	x->a_which = (x->a_which > 1) ? 0 : x->a_which;
+}
+
+static void alternate_reset(t_alternate *x)
+{
+    x->a_which = 0;
+}
+
+static void *alternate_new(t_symbol *s) /* init vals in struc */
+{
+    t_alternate *x = (t_alternate *)pd_new(alternate_class);
+    x->t_out1 = outlet_new(&x->x_obj, 0);
+    x->t_out2 = outlet_new(&x->x_obj, 0);
+    x->a_which = 0;
+    return (x);
+}
+
+void alternate_setup(void)
+{
+    alternate_class = class_new(gensym("alternate"), (t_newmethod)alternate_new, 0,
+    	    	    	sizeof(t_alternate), 0, A_NULL);
+    class_addfloat(alternate_class, (t_method)alternate_float);
+    class_addbang(alternate_class, (t_method)alternate_bang);
+    class_addmethod(alternate_class, (t_method)alternate_reset, gensym("reset"), A_NULL);
+    class_addmethod(alternate_class, (t_method)alternate_list,
+    	    gensym("list"), A_GIMME, A_NULL); 
+
+	 class_sethelpsymbol(alternate_class, gensym("help-alternate"));
+}
+