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authorIOhannes m zmölnig <zmoelnig@users.sourceforge.net>2005-03-22 20:58:25 +0000
committerIOhannes m zmölnig <zmoelnig@users.sourceforge.net>2005-03-22 20:58:25 +0000
commit2b60d55c919e7588f5aff15936e83c300b3660bb (patch)
tree14d860de7f28083d3756ad91b627de70f26788f6 /src/prime.c
parentc500bc542cb7cc78d6dac3f7da3bff626056b1aa (diff)
zexy-2.0:
- use of abstractions for objects that allow it - some objects are build both as externals and abstractions (as slower fallbacks) - code-layout is now 1:1 c-file<->object (this should allow for building of zexy as a collection of externals instead as a big library) - matrix-objects have moved to iemmatrix !! svn path=/trunk/externals/zexy/; revision=2641
Diffstat (limited to 'src/prime.c')
-rw-r--r--src/prime.c75
1 files changed, 75 insertions, 0 deletions
diff --git a/src/prime.c b/src/prime.c
new file mode 100644
index 0000000..2277019
--- /dev/null
+++ b/src/prime.c
@@ -0,0 +1,75 @@
+/******************************************************
+ *
+ * zexy - implementation file
+ *
+ * copyleft (c) IOhannes m zmölnig
+ *
+ * 1999:forum::für::umläute:2004
+ *
+ * institute of electronic music and acoustics (iem)
+ *
+ ******************************************************
+ *
+ * license: GNU General Public License v.2
+ *
+ ******************************************************/
+
+/* get the n-th prime number */
+
+#include "zexy.h"
+#include <math.h>
+
+
+static t_class *prime_class;
+
+typedef struct _prime {
+ t_object x_obj;
+} t_prime;
+
+
+void prime_float(t_prime *x, t_float f)
+{
+
+ unsigned int i=f;
+ unsigned int max_divisor;
+ unsigned int divisor=1;
+
+ if (f<2){
+ outlet_float(x->x_obj.ob_outlet, 0.0);
+ return;
+ }
+
+ if (!(i%2)){
+ outlet_float(x->x_obj.ob_outlet, (t_float)(i==2));
+ return;
+ }
+
+ max_divisor = sqrt(f)+1;
+
+ while ((divisor+=2)<max_divisor)
+ if (!(i%divisor)) {
+ outlet_float(x->x_obj.ob_outlet, 0.0);
+ return;
+ }
+
+ outlet_float(x->x_obj.ob_outlet, 1.0);
+}
+
+void *prime_new(void)
+{
+ t_prime *x = (t_prime *)pd_new(prime_class);
+
+ outlet_new(&x->x_obj, &s_float);
+
+ return (void *)x;
+}
+
+void prime_setup(void) {
+ prime_class = class_new(gensym("prime"),
+ (t_newmethod)prime_new,
+ 0, sizeof(t_prime),
+ CLASS_DEFAULT, 0);
+
+ class_addfloat(prime_class, prime_float);
+ zexy_register("prime");
+}