1 files changed, 123 insertions, 0 deletions
diff --git a/valve/valve.c b/valve/valve.c
new file mode 100644
index 0000000..5762201
--- /dev/null
+++ b/valve/valve.c
@@ -0,0 +1,123 @@
+/* takes a map like 0 1 3 4 7 and a route. if the route and the input are  */
+/* non-zero in the map, then the route is output from the object */
+#include "m_pd.h"
+#include <math.h>
+#include <string.h>
+#define MAXENTRIES 512
+#define LASTENTRY 511
+
+static t_class *valve_class;
+
+typedef struct _valve
+{
+  t_object x_obj;
+
+  t_atom *map;
+  int bufsize;
+
+  t_float input, router, max;
+  t_outlet *routed, *notrouted;
+
+  int flush;
+} t_valve;
+
+static void valve_map(t_valve *x, t_symbol *s, int n, t_atom *map)
+{
+  if (x->map) {
+    freebytes(x->map, x->bufsize * sizeof(t_atom));
+    x->map = 0;
+    x->bufsize = 0;
+  }
+
+  x->map = copybytes(map, n * sizeof(t_atom));
+  x->bufsize = n;
+}
+
+void valve_float(t_valve *x, t_floatarg fin)
+{
+  if (x->map) {
+    int arg, arga, argb;
+    arga = argb = 0;
+    float testa, testb;
+    testa = testb = 0;
+    x->input = fin;
+    arg = (int)x->input;
+    testa = fin < 0 ? 0 : atom_getfloatarg(arg, x->bufsize, x->map);
+    testb = x->router < 0 ? 0 : atom_getfloatarg(x->router, x->bufsize, x->map);
+    arga = (int)testa;
+    argb = (int)testb;
+    if(arga && argb) 
+      {
+	outlet_float(x->routed, x->router);
+      }
+    else if (!argb)
+      {
+	outlet_float(x->notrouted, argb);
+      }
+    else if (!arga && argb)
+      {
+	outlet_float(x->notrouted, arga);
+      }
+  }
+}
+
+void valve_set(t_valve *x, t_floatarg fmap, t_floatarg fval)
+{
+  if(fmap < x->bufsize && fmap >= 0)
+    {
+      int imap = (int)fmap;
+      SETFLOAT(&x->map[imap], fval);
+      x->max = fmap > x->max ? fmap : x->max;
+    }
+}
+
+void valve_clear(t_valve *x)
+{
+  if (x->map) {
+    freebytes(x->map, x->bufsize * sizeof(t_atom));
+    x->map = 0;
+    x->bufsize = 0;
+  }
+}
+
+void valve_debug(t_valve *x)
+{
+  int i;
+  for(i=0;i<x->bufsize;i++) {
+    float element = atom_getfloatarg(i, x->bufsize, x->map);
+    post("element %d = %d", i, element);
+  }
+  post("max = %d", x->max);
+}  
+
+void *valve_new(t_floatarg f) 
+{
+  t_valve *x = (t_valve *)pd_new(valve_class);
+  x->max = 0;
+  int i;
+  x->map = 0;
+  x->bufsize = 0;
+
+  floatinlet_new(&x->x_obj, &x->router);
+
+  x->routed = outlet_new(&x->x_obj, &s_float);
+  x->notrouted = outlet_new(&x->x_obj, &s_float);
+  return (void *)x;
+}
+
+void valve_setup(void) 
+{
+  valve_class = class_new(gensym("valve"),
+  (t_newmethod)valve_new,
+  0, sizeof(t_valve),
+  0, A_DEFFLOAT, 0);
+  post("|¬~¬~¬~¬~¬~¬valve~¬~¬~¬~¬~¬~¬|");
+  post("|~>^^^integer map router^^^<¬|");
+  post("|¬~¬~¬Edward Kelly 2007~¬~¬~¬|");
+  class_sethelpsymbol(valve_class, gensym("help-valve"));
+  class_addfloat(valve_class, valve_float);
+  class_addmethod(valve_class, (t_method)valve_set, gensym("set"), A_DEFFLOAT, A_DEFFLOAT, 0);
+  class_addmethod(valve_class, (t_method)valve_map, gensym("map"), A_GIMME, 0);
+  class_addmethod(valve_class, (t_method)valve_clear, gensym("clear"), A_DEFFLOAT, 0);
+  class_addmethod(valve_class, (t_method)valve_debug, gensym("debug"), A_DEFFLOAT, 0);
+}