added more list operating objects

svn path=/trunk/externals/zexy/; revision=8246

1 files changed, 200 insertions, 0 deletions

diff --git a/src/listfind.c b/src/listfind.c
new file mode 100644
index 0000000..693181f
--- /dev/null
+++ b/src/listfind.c
@@ -0,0 +1,200 @@
+/******************************************************
+ *
+ * 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
+ *
+ ******************************************************/
+
+/* 2607:forum::für::umläute:2007 */
+
+
+#include "zexy.h"
+#include <string.h>
+
+//#define DEBUG
+
+#ifdef DEBUG
+# define DEBUGFUN(x) x
+#else
+# define DEBUGFUN(x)
+#endif
+
+
+/* ------------------------- listfind ------------------------------- */
+
+/* find a sublist in a list and return the index of the occurence (or indices if there are more) */
+
+static t_class *listfind_class;
+
+
+typedef struct _listfind
+{
+  t_object       x_obj;
+  t_outlet      *x_outlet;
+
+  int x_n;
+
+  t_inlet*x_listin;
+  int     x_argc;
+  t_atom *x_argv;
+} t_listfind;
+
+
+
+static void listfind_list2(t_listfind*x,t_symbol*s, int argc, t_atom*argv)
+{
+  if(x->x_argv!=0) {
+    freebytes(x->x_argv, sizeof(t_atom)*x->x_argc);
+  }
+  x->x_argc=0;
+  x->x_argv=0;
+
+  DEBUGFUN(post("list of length %d", argc));
+
+  if(argc>0) {
+    int i;
+    x->x_argc=argc;
+    x->x_argv=(t_atom*)getbytes((x->x_argc)*sizeof(t_atom));
+    for(i=0; i<argc; i++) {
+      x->x_argv[i]=argv[i];
+    }
+  }
+
+  DEBUGFUN(post("list2: %d %x", x->x_argc, x->x_argv));
+}
+
+static int atom_equals(t_atom*a1, t_atom*a2) {
+  if(a1->a_type!=a2->a_type) return 0;
+
+  return(a1->a_w.w_symbol==a2->a_w.w_symbol);  
+}
+
+static int list_equals(int count, t_atom*a1, t_atom*a2) {
+  int i=0;
+  for(i=0; i<count; i++, a1++, a2++) {
+    if(a1->a_type!=a2->a_type) 
+      return 0;
+    if(a1->a_w.w_symbol!=a2->a_w.w_symbol) // is it that simple?
+      return 0;
+  }
+  return 1;
+}
+
+static int listfind_find(int argc, t_atom*argv, int matchc, t_atom*matchv) {
+  int i=0;
+
+  if(matchc>argc)
+     return -1;
+  if(matchc==0)
+    return 0;
+
+  for(i=0; i<=(argc-matchc); i++, argv++) {
+    if(list_equals(matchc, argv, matchv))
+      return i;
+  }
+  return -1;
+}
+
+static void listfind_doit(t_outlet*out, int longcount, t_atom*longlist, int patterncount, t_atom*patternlist) {
+  int count=0;
+  int index;
+  int offset=0;
+
+  t_atom*ap=0;
+  int length=1+((patterncount>0)?(longcount/patterncount):longcount); /* we shan't have more hits than this! */
+  if(length<1) {
+    outlet_bang(out);
+  }
+  ap=(t_atom*)getbytes(length*sizeof(t_atom));
+
+  DEBUGFUN(post("expecting no more than %d results", length));
+
+  while((index=listfind_find(longcount-offset, longlist+offset, patterncount, patternlist))>=0) {
+    offset+=index;
+    SETFLOAT(ap+count, offset);
+
+    count++;
+
+    DEBUGFUN(post("new offset=%d", offset));
+    offset++; // proceed to the next element
+  }
+
+  DEBUGFUN(post("got %d results", count));
+
+  outlet_list(out, gensym("list"), count, ap);
+  freebytes(ap, length*sizeof(t_atom));
+}
+
+static void listfind_list(t_listfind *x, t_symbol *s, int argc, t_atom *argv)
+{
+#if 0
+  /* entire list hot: 
+   * this is more intuitive when searching a pattern in many lists 
+   */
+  listfind_doit(x->x_obj.ob_outlet, argc, argv, x->x_argc, x->x_argv);
+
+#else
+
+  /* pattern is hot
+   * this is compatible with foobar's [list-find]
+   * this is more intuitive when searching different patterns in a list
+   */
+  listfind_doit(x->x_obj.ob_outlet, x->x_argc, x->x_argv, argc, argv);
+
+#endif
+
+  /* personally i think that searching 1 pattern in many lists is more useful */
+}
+
+static void listfind_free(t_listfind *x)
+{ 
+  if(x->x_argv) {
+    freebytes(x->x_argv, x->x_argc*sizeof(int));
+    x->x_argv=0;
+    x->x_argc=0;
+  }
+  inlet_free(x->x_listin);
+
+}
+
+static void *listfind_new(t_symbol *s, int argc, t_atom *argv)
+{
+  t_listfind *x = (t_listfind *)pd_new(listfind_class);
+  ZEXY_USEVAR(s);
+
+  outlet_new(&x->x_obj, 0);
+  x->x_listin=inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("list"), gensym("lst2"));
+
+  x->x_argc=0;
+  x->x_argv=0;
+
+  listfind_list2(x, gensym("list"), argc, argv);
+
+  return (x);
+}
+
+
+static void listfind_help(t_listfind*x)
+{
+  post("\n%c listfind\t\t:: split lists into multiple sublists based on matches", HEARTSYMBOL);
+}
+
+void listfind_setup(void)
+{
+  listfind_class = class_new(gensym("listfind"), (t_newmethod)listfind_new, 
+                             (t_method)listfind_free, sizeof(t_listfind), 0, A_GIMME, 0);
+  class_addlist    (listfind_class, listfind_list);
+  class_addmethod  (listfind_class, (t_method)listfind_list2, gensym("lst2"), A_GIMME, 0);
+
+  class_addmethod(listfind_class, (t_method)listfind_help, gensym("help"), A_NULL);
+  zexy_register("listfind");
+}