From 93f64df7a4eee1151d2b70d37ab17f04e58cbc46 Mon Sep 17 00:00:00 2001
From: Hans-Christoph Steiner <eighthave@users.sourceforge.net>
Date: Mon, 13 Dec 2010 01:37:22 +0000
Subject: refactored x_misc.c into cputime.c loadband.c namecanvas.c realtime.c
 random.c

svn path=/trunk/; revision=14600
---
 externals/vanilla/random.c | 75 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 externals/vanilla/random.c

(limited to 'externals/vanilla/random.c')

diff --git a/externals/vanilla/random.c b/externals/vanilla/random.c
new file mode 100644
index 00000000..67e4cf35
--- /dev/null
+++ b/externals/vanilla/random.c
@@ -0,0 +1,75 @@
+/* Copyright (c) 1997-1999 Miller Puckette.
+* For information on usage and redistribution, and for a DISCLAIMER OF ALL
+* WARRANTIES, see the file, "LICENSE.txt," in this distribution.  */
+
+/* misc. */
+
+#include "m_pd.h"
+#include "s_stuff.h"
+#include <math.h>
+#include <stdio.h>
+#include <string.h>
+#ifdef UNISTD
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/times.h>
+#include <sys/param.h>
+#include <unistd.h>
+#endif
+#ifdef MSW
+#include <wtypes.h>
+#include <time.h>
+#endif
+
+static t_class *random_class;
+
+typedef struct _random
+{
+    t_object x_obj;
+    t_float x_f;
+    unsigned int x_state;
+} t_random;
+
+
+static int makeseed(void)
+{
+    static unsigned int random_nextseed = 1489853723;
+    random_nextseed = random_nextseed * 435898247 + 938284287;
+    return (random_nextseed & 0x7fffffff);
+}
+
+static void *random_new(t_floatarg f)
+{
+    t_random *x = (t_random *)pd_new(random_class);
+    x->x_f = f;
+    x->x_state = makeseed();
+    floatinlet_new(&x->x_obj, &x->x_f);
+    outlet_new(&x->x_obj, &s_float);
+    return (x);
+}
+
+static void random_bang(t_random *x)
+{
+    int n = x->x_f, nval;
+    int range = (n < 1 ? 1 : n);
+    unsigned int randval = x->x_state;
+    x->x_state = randval = randval * 472940017 + 832416023;
+    nval = ((double)range) * ((double)randval)
+        * (1./4294967296.);
+    if (nval >= range) nval = range-1;
+    outlet_float(x->x_obj.ob_outlet, nval);
+}
+
+static void random_seed(t_random *x, t_float f, t_float glob)
+{
+    x->x_state = f;
+}
+
+static void random_setup(void)
+{
+    random_class = class_new(gensym("random"), (t_newmethod)random_new, 0,
+        sizeof(t_random), 0, A_DEFFLOAT, 0);
+    class_addbang(random_class, random_bang);
+    class_addmethod(random_class, (t_method)random_seed,
+        gensym("seed"), A_FLOAT, 0);
+}
-- 
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