1 files changed, 45 insertions, 0 deletions
diff --git a/externals/vanilla/exp~.c b/externals/vanilla/exp~.c
new file mode 100644
index 00000000..5296544b
--- /dev/null
+++ b/externals/vanilla/exp~.c
@@ -0,0 +1,45 @@
+/* Copyright (c) 1997-2001 Miller Puckette 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 <math.h>
+
+static t_class *exp_tilde_class;
+
+typedef struct _exp_tilde
+{
+    t_object x_obj;
+    t_float x_f;
+} t_exp_tilde;
+
+static void *exp_tilde_new(t_symbol *s, int argc, t_atom *argv)
+{
+    t_exp_tilde *x = (t_exp_tilde *)pd_new(exp_tilde_class);
+    outlet_new(&x->x_obj, &s_signal);
+    return (x);
+}
+
+t_int *exp_tilde_perform(t_int *w)
+{
+    t_sample *in1 = (t_sample *)(w[1]);
+    t_sample *out = (t_sample *)(w[2]);
+    int n = (int)(w[3]);
+    while (n--)
+        *out++ = exp(*in1++);
+    return (w+4);
+}
+
+static void exp_tilde_dsp(t_exp_tilde *x, t_signal **sp)
+{
+    dsp_add(exp_tilde_perform, 3,
+        sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n);
+}
+
+static void exp_tilde_setup(void)
+{
+    exp_tilde_class = class_new(gensym("exp~"), (t_newmethod)exp_tilde_new, 0,
+        sizeof(t_exp_tilde), 0, 0);
+    CLASS_MAINSIGNALIN(exp_tilde_class, t_exp_tilde, x_f);
+    class_addmethod(exp_tilde_class, (t_method)exp_tilde_dsp, gensym("dsp"), 0);
+}