1 files changed, 48 insertions, 0 deletions
diff --git a/cyclone/sickle/atan.c b/cyclone/sickle/atan.c
new file mode 100644
index 0000000..f541fa4
--- /dev/null
+++ b/cyclone/sickle/atan.c
@@ -0,0 +1,48 @@
+/* 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 <math.h>
+#include "m_pd.h"
+#include "sickle/sic.h"
+
+#if defined(NT) || defined(MACOSX)
+/* cf pd/src/x_arithmetic.c */
+#define atanf  atan
+#endif
+
+typedef t_sic t_atan;
+static t_class *atan_class;
+
+static t_int *atan_perform(t_int *w)
+{
+    int nblock = (int)(w[1]);
+    t_float *in = (t_float *)(w[2]);
+    t_float *out = (t_float *)(w[3]);
+    while (nblock--)
+    {
+	float f = *in++;
+	*out++ = atanf(f);  /* CHECKME no protection against NaNs */
+    }
+    return (w + 4);
+}
+
+static void atan_dsp(t_atan *x, t_signal **sp)
+{
+    dsp_add(atan_perform, 3, sp[0]->s_n, sp[0]->s_vec, sp[1]->s_vec);
+}
+
+static void *atan_new(void)
+{
+    t_atan *x = (t_atan *)pd_new(atan_class);
+    outlet_new((t_object *)x, &s_signal);
+    return (x);
+}
+
+void atan_tilde_setup(void)
+{
+    atan_class = class_new(gensym("atan~"),
+			   (t_newmethod)atan_new, 0,
+			   sizeof(t_atan), 0, 0);
+    sic_setup(atan_class, atan_dsp, SIC_FLOATTOSIGNAL);
+}