1 files changed, 48 insertions, 0 deletions
diff --git a/cyclone/sickle/acos.c b/cyclone/sickle/acos.c
new file mode 100644
index 0000000..1dd5719
--- /dev/null
+++ b/cyclone/sickle/acos.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 acosf  acos
+#endif
+
+typedef t_sic t_acos;
+static t_class *acos_class;
+
+static t_int *acos_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++ = acosf(f);  /* CHECKED no protection against NaNs */
+    }
+    return (w + 4);
+}
+
+static void acos_dsp(t_acos *x, t_signal **sp)
+{
+    dsp_add(acos_perform, 3, sp[0]->s_n, sp[0]->s_vec, sp[1]->s_vec);
+}
+
+static void *acos_new(void)
+{
+    t_acos *x = (t_acos *)pd_new(acos_class);
+    outlet_new((t_object *)x, &s_signal);
+    return (x);
+}
+
+void acos_tilde_setup(void)
+{
+    acos_class = class_new(gensym("acos~"),
+			   (t_newmethod)acos_new, 0,
+			   sizeof(t_acos), 0, 0);
+    sic_setup(acos_class, acos_dsp, SIC_FLOATTOSIGNAL);
+}