+ * \param dynar the dynar to sort
+ * \param color the color function of type (int (compar_fn*) (void*) (void*)). The return value of color is assumed to be 0, 1, or 2.
+ *
+ * At the end of the call, elements with color 0 are at the beginning of the dynar, elements with color 2 are at the end and elements with color 1 are in the middle.
+ *
+ * Remark: if the elements stored in the dynar are structures, the color
+ * function has to retrieve the field to sort first.
+ */
+XBT_PUBLIC(void) xbt_dynar_three_way_partition(xbt_dynar_t const dynar,
+ int_f_pvoid_t color)
+{
+ unsigned long int i;
+ unsigned long int p = -1;
+ unsigned long int q = dynar->used;
+ const unsigned long elmsize = dynar->elmsize;
+ void *tmp = xbt_malloc(elmsize);
+ void *elm;
+
+ for (i = 0; i < q;) {
+ void *elmi = _xbt_dynar_elm(dynar, i);
+ int colori = color(elmi);
+
+ if (colori == 1) {
+ ++i;
+ } else {
+ if (colori == 0) {
+ elm = _xbt_dynar_elm(dynar, ++p);
+ ++i;
+ } else { /* colori == 2 */
+ elm = _xbt_dynar_elm(dynar, --q);
+ }
+ if (elm != elmi) {
+ memcpy(tmp, elm, elmsize);
+ memcpy(elm, elmi, elmsize);
+ memcpy(elmi, tmp, elmsize);
+ }
+ }
+ }
+ xbt_free(tmp);
+}
+
+/** @brief Transform a dynar into a NULL terminated array.
+ * The dynar won't be usable afterwards.