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-rw-r--r--src/tabminmax.c140
1 files changed, 140 insertions, 0 deletions
diff --git a/src/tabminmax.c b/src/tabminmax.c
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+/******************************************************
+ *
+ * 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"));
+}