1 files changed, 140 insertions, 0 deletions
diff --git a/src/tabminmax.c b/src/tabminmax.c
new file mode 100644
index 0000000..56307e2
--- /dev/null
+++ b/src/tabminmax.c
@@ -0,0 +1,140 @@
+/******************************************************
+ *
+ * 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
+ *
+ ******************************************************/
+
+/* hack : 2108:forum::für::umläute:1999 @ iem */
+
+#include "zexy.h"
+
+
+/* =================== tabminmax ====================== */
+
+static t_class *tabminmax_class;
+
+typedef struct _tabminmax
+{
+  t_object x_obj;
+  t_outlet*min_out, *max_out;
+  t_symbol *x_arrayname;
+  t_int startindex, stopindex;
+} t_tabminmax;
+
+static void tabminmax_bang(t_tabminmax *x)
+{
+  t_garray *A;
+  int npoints;
+  t_float *vec;
+
+  if (!(A = (t_garray *)pd_findbyclass(x->x_arrayname, garray_class)))
+    error("%s: no such array", x->x_arrayname->s_name);
+  else if (!garray_getfloatarray(A, &npoints, &vec))
+    error("%s: bad template for tabminmax", x->x_arrayname->s_name);
+  else
+    {
+      int n;
+      t_atom atombuf[2];
+      t_float min, max;
+      int mindex, maxdex;
+
+      int start=x->startindex;
+      int stop =x->stopindex;
+      if(start<0||start>stop)start=0;
+      if(stop<start||stop>npoints)stop=npoints;
+      npoints=stop-start;
+
+      min=vec[start];
+      max=vec[start];
+
+      mindex=start;
+      maxdex=start;
+      
+      for (n = 1; n < npoints; n++){
+	t_float val=vec[start+n];
+	if(val<min){
+	  mindex=start+n;
+	  min=val;
+	}
+	if(val>max){
+	  maxdex=start+n;
+	  max=val;
+	}
+      }
+
+      SETFLOAT(atombuf, max);
+      SETFLOAT(atombuf+1, maxdex);
+      outlet_list(x->max_out, &s_list, 2, atombuf);
+
+      SETFLOAT(atombuf, min);
+      SETFLOAT(atombuf+1, mindex);
+      outlet_list(x->min_out, &s_list, 2, atombuf);
+    }
+}
+
+static void tabminmax_list(t_tabminmax *x, t_symbol*s,int argc, t_atom*argv)
+{
+  int a,b;
+  switch(argc){
+  case 2:
+    a=atom_getint(argv);
+    b=atom_getint(argv+1);
+    x->startindex=(a<b)?a:b;
+    x->stopindex =(a>b)?a:b;
+    tabminmax_bang(x);
+    break;
+  default:
+    error("tabminmax: list must be 2 floats (is %d atoms)", argc);
+  }
+}
+
+static void tabminmax_set(t_tabminmax *x, t_symbol *s)
+{
+  x->x_arrayname = s;
+}
+
+static void *tabminmax_new(t_symbol *s)
+{
+  t_tabminmax *x = (t_tabminmax *)pd_new(tabminmax_class);
+  x->x_arrayname = s;
+  x->startindex=0;
+  x->stopindex=-1;
+  x->min_out=outlet_new(&x->x_obj, &s_list);
+  x->max_out=outlet_new(&x->x_obj, &s_list);
+
+  return (x);
+}
+
+static void tabminmax_helper(void)
+{
+  post("\n%c tabminmax - object : dumps a table as a package of floats", HEARTSYMBOL);
+  post("'set <table>'\t: read out another table\n"
+       "'bang'\t\t: get min and max of the table\n"
+       "outlet\t\t: table-data as package of floats");
+  post("creation\t: \"tabminmax <table>\"");
+
+}
+
+void tabminmax_setup(void)
+{
+  tabminmax_class = class_new(gensym("tabminmax"), (t_newmethod)tabminmax_new,
+			     0, sizeof(t_tabminmax), 0, A_DEFSYM, 0);
+  class_addbang(tabminmax_class, (t_method)tabminmax_bang);
+  class_addlist(tabminmax_class, (t_method)tabminmax_list);
+
+  class_addmethod(tabminmax_class, (t_method)tabminmax_set, gensym("set"),
+		  A_SYMBOL, 0);
+
+  class_addmethod(tabminmax_class, (t_method)tabminmax_helper, gensym("help"), 0);
+  class_sethelpsymbol(tabminmax_class, gensym("zexy/tabminmax"));
+}