src/share/vm/utilities/growableArray.hpp

*** 372,381 ****
--- 372,415 ----
    }
    // sort by fixed-stride sub arrays:
    void sort(int f(E*,E*), int stride) {
      qsort(_data, length() / stride, sizeof(E) * stride, (_sort_Fn)f);
    }
+ 
+   // Binary search and insertion utility.  Search array for element
+   // matching key according to the static compare function.  Insert
+   // that element is not already in the list.  Assumes the list is
+   // already sorted according to compare function.
+   template <int compare(const E&, const E&)> E insert_sorted(E& key) {
+     bool found;
+     int location = find_sorted<E, compare>(key, found);
+     if (!found) {
+       insert_before(location, key);
+     }
+     return at(location);
+   }
+ 
+   template <typename K, int compare(const K&, const E&)> int find_sorted(const K& key, bool& found) {
+     found = false;
+     int min = 0;
+     int max = length() - 1;
+   
+     while (max >= min) {
+       int mid = (max + min) / 2;
+       E value = at(mid);
+       int diff = compare(key, value);
+       if (diff > 0) {
+         min = mid + 1;
+       } else if (diff < 0) {
+         max = mid - 1;
+       } else {
+         found = true;
+         return mid;
+       }
+     }
+     return min;
+   }
  };
  
  // Global GrowableArray methods (one instance in the library per each 'E' type).
  
  template<class E> void GrowableArray<E>::grow(int j) {