1 files changed, 75 insertions, 0 deletions
diff --git a/cyclone/hammer/decide.c b/cyclone/hammer/decide.c
new file mode 100644
index 0000000..a612fbf
--- /dev/null
+++ b/cyclone/hammer/decide.c
@@ -0,0 +1,75 @@
+/* Copyright (c) 2002-2003 krzYszcz and others.
+ * For information on usage and redistribution, and for a DISCLAIMER OF ALL
+ * WARRANTIES, see the file, "LICENSE.txt," in this distribution.  */
+
+#include "m_pd.h"
+#include "common/loud.h"
+
+typedef struct _decide
+{
+    t_object      x_ob;
+    unsigned int  x_seed;
+} t_decide;
+
+static t_class *decide_class;
+
+/* the random bit algo is taken from NR (method II in 7.4) -- CHECKED */
+#define RBIT1      1
+#define RBIT2      2
+#define RBIT5      16
+#define RBIT18     131072
+#define RBIT_MASK  (RBIT1 + RBIT2 + RBIT5)
+
+static void decide_bang(t_decide *x)
+{
+    if (x->x_seed & RBIT18)
+    {
+	x->x_seed = ((x->x_seed ^ RBIT_MASK) << 1) | RBIT1;
+	outlet_float(((t_object *)x)->ob_outlet, 1);
+    }
+    else
+    {
+	x->x_seed <<= 1;
+	outlet_float(((t_object *)x)->ob_outlet, 0);
+    }
+}
+
+static void decide_float(t_decide *x, t_float f)
+{
+    /* CHECKED: float loudly rejected, int (any value) same as bang */
+    int i;
+    if (loud_checkint((t_pd *)x, f, &i, &s_float))
+	decide_bang(x);
+}
+
+static void decide_ft1(t_decide *x, t_floatarg f)
+{
+    int i = (int)f;  /* CHECKED */
+    if (i)  /* CHECKED: negative numbers are accepted */
+	x->x_seed = i;
+    else
+	x->x_seed = 123456789;  /* FIXME */
+}
+
+static void *decide_new(t_floatarg f)
+{
+    t_decide *x = (t_decide *)pd_new(decide_class);
+    x->x_seed = 123456789;  /* FIXME */
+    inlet_new((t_object *)x, (t_pd *)x, &s_float, gensym("ft1"));
+    outlet_new((t_object *)x, &s_float);
+    return (x);
+}
+
+void decide_setup(void)
+{
+    decide_class = class_new(gensym("decide"),
+			    (t_newmethod)decide_new, 0,
+			    sizeof(t_decide), 0,
+			    A_DEFFLOAT, 0);
+    class_addbang(decide_class, decide_bang);
+    class_addfloat(decide_class, decide_float);
+    class_addmethod(decide_class, (t_method)decide_ft1,
+		    gensym("ft1"), A_FLOAT, 0);
+    /* CHECKED list is auto-unfolded */
+    /* CHECKED doesn't understand "seed" */
+}