--- rxvt-unicode/src/rxvtutil.C	2004/08/15 00:37:04	1.1
+++ rxvt-unicode/src/rxvtutil.C	2006/01/30 16:12:58	1.5
@@ -6,6 +6,8 @@
 
 class byteorder byteorder;
 
+unsigned int byteorder::e;
+
 byteorder::byteorder ()
 {
   union {
@@ -21,5 +23,62 @@
   e = w.u;
 }
 
+#if !HAVE_GCC_BUILTINS
+int ctz (unsigned int x) CONST
+{
+  int r = 0;
+
+  x &= -x; // this isolates the lowest bit
+
+  if (x & 0xaaaaaaaa) r +=  1;
+  if (x & 0xcccccccc) r +=  2;
+  if (x & 0xf0f0f0f0) r +=  4;
+  if (x & 0xff00ff00) r +=  8;
+  if (x & 0xffff0000) r += 16;
+
+  return r;
+}
+
+int popcount (unsigned int x) CONST
+{
+  x -=  (x >> 1) & 0x55555555;
+  x  = ((x >> 2) & 0x33333333) + (x & 0x33333333);
+  x  = ((x >> 4) + x) & 0x0f0f0f0f;
+  x *= 0x01010101;
+
+  return x >> 24;
+}
+#endif
+
+void *
+zero_initialized::operator new (size_t s)
+{
+  void *p = malloc (s);
+
+  memset (p, 0, s);
+  return p;
+}
+
+void
+zero_initialized::operator delete (void *p, size_t s)
+{
+  free (p);
+}
+
+static void *temp_buf;
+static uint32_t temp_len;
+
+void *
+rxvt_temp_buf (int len)
+{
+  if (len > temp_len)
+    { 
+      free (temp_buf);
+      temp_buf = malloc (len);
+      temp_len = len;
+    }
+  
+  return temp_buf;
+}