*/
public abstract int size { get; }
+ /**
+ * Specifies whether this collection is empty.
+ */
+ public virtual bool is_empty { get { return size == 0; } }
+
/**
* Determines whether this collection contains the specified item.
*
* read-only collections.
*/
public abstract void clear ();
+
+ /**
+ * Adds all items in the input collection to this collection.
+ *
+ * @param collection the collection which items will be added to this
+ * collection.
+ *
+ * @return ``true`` if the collection has been changed, ``false`` otherwise
+ */
+ public virtual bool add_all (Collection<G> collection) {
+ bool changed = false;
+ for (Iterator<G> iter = collection.iterator (); iter.next ();) {
+ G item = iter.get ();
+ if (!contains (item)) {
+ add (item);
+ changed = true;
+ }
+ }
+ return changed;
+ }
+
+ /**
+ * Returns an array containing all of items from this collection.
+ *
+ * @return an array containing all of items from this collection
+ */
+ public virtual G[] to_array () {
+ var t = typeof (G);
+ if (t == typeof (bool)) {
+ return (G[]) to_bool_array ((Collection<bool>) this);
+ } else if (t == typeof (char)) {
+ return (G[]) to_char_array ((Collection<char>) this);
+ } else if (t == typeof (uchar)) {
+ return (G[]) to_uchar_array ((Collection<uchar>) this);
+ } else if (t == typeof (int)) {
+ return (G[]) to_int_array ((Collection<int>) this);
+ } else if (t == typeof (uint)) {
+ return (G[]) to_uint_array ((Collection<uint>) this);
+ } else if (t == typeof (int64)) {
+ return (G[]) to_int64_array ((Collection<int64>) this);
+ } else if (t == typeof (uint64)) {
+ return (G[]) to_uint64_array ((Collection<uint64>) this);
+ } else if (t == typeof (long)) {
+ return (G[]) to_long_array ((Collection<long>) this);
+ } else if (t == typeof (ulong)) {
+ return (G[]) to_ulong_array ((Collection<ulong>) this);
+ } else if (t == typeof (float)) {
+ return (G[]) to_float_array ((Collection<float>) this);
+ } else if (t == typeof (double)) {
+ return (G[]) to_double_array ((Collection<double>) this);
+ } else if (t.is_enum () || t.is_flags ()) {
+ return (G[]) to_int_array ((Collection<int>) this);
+ } else {
+ G[] array = new G[size];
+ int index = 0;
+ foreach (G element in this) {
+ array[index++] = (owned)element;
+ }
+ return array;
+ }
+ }
+
+ private static bool[] to_bool_array (Collection<bool> coll) {
+ bool[] array = new bool[coll.size];
+ int index = 0;
+ foreach (bool element in coll) {
+ array[index++] = element;
+ }
+ return array;
+ }
+
+ private static char[] to_char_array (Collection<char> coll) {
+ char[] array = new char[coll.size];
+ int index = 0;
+ foreach (char element in coll) {
+ array[index++] = element;
+ }
+ return array;
+ }
+
+ private static uchar[] to_uchar_array (Collection<uchar> coll) {
+ uchar[] array = new uchar[coll.size];
+ int index = 0;
+ foreach (uchar element in coll) {
+ array[index++] = element;
+ }
+ return array;
+ }
+
+ private static int[] to_int_array (Collection<int> coll) {
+ int[] array = new int[coll.size];
+ int index = 0;
+ foreach (int element in coll) {
+ array[index++] = element;
+ }
+ return array;
+ }
+
+ private static uint[] to_uint_array (Collection<uint> coll) {
+ uint[] array = new uint[coll.size];
+ int index = 0;
+ foreach (uint element in coll) {
+ array[index++] = element;
+ }
+ return array;
+ }
+
+ private static int64?[] to_int64_array (Collection<int64?> coll) {
+ int64?[] array = new int64?[coll.size];
+ int index = 0;
+ foreach (int64? element in coll) {
+ array[index++] = (owned)element;
+ }
+ return array;
+ }
+
+ private static uint64?[] to_uint64_array (Collection<uint64?> coll) {
+ uint64?[] array = new uint64?[coll.size];
+ int index = 0;
+ foreach (uint64? element in coll) {
+ array[index++] = (owned)element;
+ }
+ return array;
+ }
+
+ private static long[] to_long_array (Collection<long> coll) {
+ long[] array = new long[coll.size];
+ int index = 0;
+ foreach (long element in coll) {
+ array[index++] = element;
+ }
+ return array;
+ }
+
+ private static ulong[] to_ulong_array (Collection<ulong> coll) {
+ ulong[] array = new ulong[coll.size];
+ int index = 0;
+ foreach (ulong element in coll) {
+ array[index++] = element;
+ }
+ return array;
+ }
+
+ private static float?[] to_float_array (Collection<float?> coll) {
+ float?[] array = new float?[coll.size];
+ int index = 0;
+ foreach (float? element in coll) {
+ array[index++] = (owned)element;
+ }
+ return array;
+ }
+
+ private static double?[] to_double_array (Collection<double?> coll) {
+ double?[] array = new double?[coll.size];
+ int index = 0;
+ foreach (double? element in coll) {
+ array[index++] = (owned)element;
+ }
+ return array;
+ }
}
--- /dev/null
+/* timsort.vala
+ *
+ * Copyright (C) 2009 Didier Villevalois
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Author:
+ * Didier 'Ptitjes Villevalois <ptitjes@free.fr>
+ */
+
+/**
+ * A stable, adaptive, iterative mergesort that requires far fewer than n*lg(n)
+ * comparisons when running on partially sorted arrays, while offering
+ * performance comparable to a traditional mergesort when run on random arrays.
+ * Like all proper mergesorts, this sort is stable and runs O(n*log(n)) time
+ * (worst case). In the worst case, this sort requires temporary storage space
+ * for n/2 object references; in the best case, it requires only a small
+ * constant amount of space.
+ *
+ * This implementation was adapted from Tim Peters's list sort for Python,
+ * which is described in detail here:
+ * [[http://svn.python.org/projects/python/trunk/Objects/listsort.txt]]
+ *
+ * Tim's C code may be found here:
+ * [[http://svn.python.org/projects/python/trunk/Objects/listobject.c]]
+ *
+ * The underlying techniques are described in this paper (and may have even
+ * earlier origins):
+ *
+ * "Optimistic Sorting and Information Theoretic Complexity"
+ * Peter McIlroy
+ * SODA (Fourth Annual ACM-SIAM Symposium on Discrete Algorithms), pp
+ * 467-474, Austin, Texas, 25-27 January 1993.
+ */
+internal class Vala.TimSort<G> {
+
+ public static void sort<G> (List<G> list, CompareDataFunc<G> compare) {
+ if (list is ArrayList) {
+ TimSort.sort_arraylist<G> ((ArrayList<G>) list, compare);
+ } else {
+ TimSort.sort_list<G> (list, compare);
+ }
+ }
+
+ private static void sort_list<G> (List<G> list, CompareDataFunc<G> compare) {
+ TimSort<G> helper = new TimSort<G> ();
+
+ helper.list_collection = list;
+ helper.array = list.to_array ();
+ helper.list = helper.array;
+ helper.index = 0;
+ helper.size = list.size;
+ helper.compare = compare;
+
+ helper.do_sort ();
+
+ // TODO Use a list iterator and use iter.set (item)
+ list.clear ();
+ foreach (G item in helper.array) {
+ list.add (item);
+ }
+ }
+
+ private static void sort_arraylist<G> (ArrayList<G> list, CompareDataFunc<G> compare) {
+ TimSort<G> helper = new TimSort<G> ();
+
+ helper.list_collection = list;
+ helper.list = list._items;
+ helper.index = 0;
+ helper.size = list._size;
+ helper.compare = compare;
+
+ helper.do_sort ();
+ }
+
+ private const int MINIMUM_GALLOP = 7;
+
+ private List<G> list_collection;
+ private G[] array;
+ private void** list;
+ private int index;
+ private int size;
+ private Slice<G>[] pending;
+ private int minimum_gallop;
+ private unowned CompareDataFunc<G> compare;
+
+ private void do_sort () {
+ if (size < 2) {
+ return;
+ }
+
+ pending = new Slice<G>[0];
+ minimum_gallop = MINIMUM_GALLOP;
+
+ Slice<G> remaining = new Slice<G> (list, index, size);
+ int minimum_length = compute_minimum_run_length (remaining.length);
+
+ while (remaining.length > 0) {
+ // Get the next run
+ bool descending;
+ Slice<G> run = compute_longest_run (remaining, out descending);
+ #if DEBUG
+ message ("New run (%d, %d) %s", run.index, run.length,
+ descending ? "descending" : "ascending");
+ #endif
+ if (descending) {
+ run.reverse ();
+ }
+
+ // Extend it to minimum_length, if needed
+ if (run.length < minimum_length) {
+ int sorted_count = run.length;
+ run.length = int.min (minimum_length, remaining.length);
+ insertion_sort (run, sorted_count);
+ #if DEBUG
+ message ("Extended to (%d, %d) and sorted from index %d",
+ run.index, run.length, sorted_count);
+ #endif
+ }
+
+ // Move remaining after run
+ remaining.shorten_start (run.length);
+
+ // Add run to pending runs and try to merge
+ pending += (owned) run;
+ merge_collapse ();
+ }
+
+ assert (remaining.index == size);
+
+ merge_force_collapse ();
+
+ assert (pending.length == 1);
+ assert (pending[0].index == 0);
+ assert (pending[0].length == size);
+ }
+
+ private delegate bool LowerFunc (G left, G right);
+
+ private inline bool lower_than (G left, G right) {
+ return compare (left, right) < 0;
+ }
+
+ private inline bool lower_than_or_equal_to (G left, G right) {
+ return compare (left, right) <= 0;
+ }
+
+ private int compute_minimum_run_length (int length) {
+ int run_length = 0;
+ while (length >= 64) {
+ run_length |= length & 1;
+ length >>= 1;
+ }
+ return length + run_length;
+ }
+
+ private Slice<G> compute_longest_run (Slice<G> a, out bool descending) {
+ int run_length;
+ if (a.length <= 1) {
+ run_length = a.length;
+ descending = false;
+ } else {
+ run_length = 2;
+ if (lower_than (a.list[a.index + 1], a.list[a.index])) {
+ descending = true;
+ for (int i = a.index + 2; i < a.index + a.length; i++) {
+ if (lower_than (a.list[i], a.list[i-1])) {
+ run_length++;
+ } else {
+ break;
+ }
+ }
+ } else {
+ descending = false;
+ for (int i = a.index + 2; i < a.index + a.length; i++) {
+ if (lower_than (a.list[i], a.list[i-1])) {
+ break;
+ } else {
+ run_length++;
+ }
+ }
+ }
+ }
+ return new Slice<G> (a.list, a.index, run_length);
+ }
+
+ private void insertion_sort (Slice<G> a, int offset) {
+ #if DEBUG
+ message ("Sorting (%d, %d) at %d", a.index, a.length, offset);
+ #endif
+ for (int start = a.index + offset; start < a.index + a.length; start++) {
+ int left = a.index;
+ int right = start;
+ void* pivot = a.list[right];
+
+ while (left < right) {
+ int p = left + ((right - left) >> 1);
+ if (lower_than (pivot, a.list[p])) {
+ right = p;
+ } else {
+ left = p + 1;
+ }
+ }
+ assert (left == right);
+
+ Memory.move (&a.list[left + 1], &a.list[left], sizeof (G) * (start - left));
+ a.list[left] = pivot;
+ }
+ }
+
+ private void merge_collapse () {
+ #if DEBUG
+ message ("Merge Collapse");
+ #endif
+ int count = pending.length;
+ while (count > 1) {
+ #if DEBUG
+ message ("Pending count: %d", count);
+ if (count >= 3) {
+ message ("pending[count-3]=%p; pending[count-2]=%p; pending[count-1]=%p",
+ pending[count-3], pending[count-2], pending[count-1]);
+ }
+ #endif
+ if (count >= 3 && pending[count-3].length <= pending[count-2].length + pending[count-1].length) {
+ if (pending[count-3].length < pending[count-1].length) {
+ merge_at (count-3);
+ } else {
+ merge_at (count-2);
+ }
+ } else if (pending[count-2].length <= pending[count-1].length) {
+ merge_at (count-2);
+ } else {
+ break;
+ }
+ count = pending.length;
+ #if DEBUG
+ message ("New pending count: %d", count);
+ #endif
+ }
+ }
+
+ private void merge_force_collapse () {
+ #if DEBUG
+ message ("Merge Force Collapse");
+ #endif
+ int count = pending.length;
+ #if DEBUG
+ message ("Pending count: %d", count);
+ #endif
+ while (count > 1) {
+ if (count >= 3 && pending[count-3].length < pending[count-1].length) {
+ merge_at (count-3);
+ } else {
+ merge_at (count-2);
+ }
+ count = pending.length;
+ #if DEBUG
+ message ("New pending count: %d", count);
+ #endif
+ }
+ }
+
+ private void merge_at (int index) {
+ #if DEBUG
+ message ("Merge at %d", index);
+ #endif
+ Slice<G> a = (owned) pending[index];
+ Slice<G> b = (owned) pending[index + 1];
+
+ assert (a.length > 0);
+ assert (b.length > 0);
+ assert (a.index + a.length == b.index);
+
+ pending[index] = new Slice<G> (list, a.index, a.length + b.length);
+ pending.move (index + 2, index + 1, pending.length - index - 2);
+ pending.length -= 1;
+
+ int sorted_count = gallop_rightmost (b.peek_first (), a, 0);
+ a.shorten_start (sorted_count);
+ if (a.length == 0) {
+ return;
+ }
+
+ b.length = gallop_leftmost (a.peek_last (), b, b.length - 1);
+ if (b.length == 0) {
+ return;
+ }
+
+ if (a.length <= b.length) {
+ merge_low ((owned) a, (owned) b);
+ } else {
+ merge_high ((owned) a, (owned) b);
+ }
+ }
+
+ private int gallop_leftmost (G key, Slice<G> a, int hint) {
+ #if DEBUG
+ message ("Galop leftmost in (%d, %d), hint=%d", a.index, a.length, hint);
+ #endif
+ assert (0 <= hint);
+ assert (hint < a.length);
+
+ int p = a.index + hint;
+ int last_offset = 0;
+ int offset = 1;
+ if (lower_than (a.list[p], key)) {
+ int max_offset = a.length - hint;
+ while (offset < max_offset) {
+ if (lower_than (a.list[p + offset], key)) {
+ last_offset = offset;
+ offset <<= 1;
+ offset++;
+ } else {
+ break;
+ }
+ }
+
+ if (offset > max_offset) {
+ offset = max_offset;
+ }
+
+ last_offset = hint + last_offset;
+ offset = hint + offset;
+ } else {
+ int max_offset = hint + 1;
+ while (offset < max_offset) {
+ if (lower_than (a.list[p - offset], key)) {
+ break;
+ } else {
+ last_offset = offset;
+ offset <<= 1;
+ offset++;
+ }
+ }
+
+ if (offset > max_offset) {
+ offset = max_offset;
+ }
+
+ int temp_last_offset = last_offset;
+ int temp_offset = offset;
+ last_offset = hint - temp_offset;
+ offset = hint - temp_last_offset;
+ }
+
+ assert (-1 <= last_offset);
+ assert (last_offset < offset);
+ assert (offset <= a.length);
+
+ last_offset += 1;
+ while (last_offset < offset) {
+ int m = last_offset + ((offset - last_offset) >> 1);
+ if (lower_than (a.list[a.index + m], key)) {
+ last_offset = m + 1;
+ } else {
+ offset = m;
+ }
+ }
+
+ assert (last_offset == offset);
+ return offset;
+ }
+
+ private int gallop_rightmost (G key, Slice<G> a, int hint) {
+ #if DEBUG
+ message ("Galop rightmost in (%d, %d), hint=%d", a.index, a.length, hint);
+ #endif
+ assert (0 <= hint);
+ assert (hint < a.length);
+
+ int p = a.index + hint;
+ int last_offset = 0;
+ int offset = 1;
+ if (lower_than_or_equal_to (a.list[p], key)) {
+ int max_offset = a.length - hint;
+ while (offset < max_offset) {
+ if (lower_than_or_equal_to (a.list[p + offset], key)) {
+ last_offset = offset;
+ offset <<= 1;
+ offset++;
+ } else {
+ break;
+ }
+ }
+
+ if (offset > max_offset) {
+ offset = max_offset;
+ }
+
+ last_offset = hint + last_offset;
+ offset = hint + offset;
+ } else {
+ int max_offset = hint + 1;
+ while (offset < max_offset) {
+ if (lower_than_or_equal_to (a.list[p - offset], key)) {
+ break;
+ } else {
+ last_offset = offset;
+ offset <<= 1;
+ offset++;
+ }
+ }
+
+ if (offset > max_offset) {
+ offset = max_offset;
+ }
+
+ int temp_last_offset = last_offset;
+ int temp_offset = offset;
+ last_offset = hint - temp_offset;
+ offset = hint - temp_last_offset;
+ }
+
+ assert (-1 <= last_offset);
+ assert (last_offset < offset);
+ assert (offset <= a.length);
+
+ last_offset += 1;
+ while (last_offset < offset) {
+ int m = last_offset + ((offset - last_offset) >> 1);
+ if (lower_than_or_equal_to (a.list[a.index + m], key)) {
+ last_offset = m + 1;
+ } else {
+ offset = m;
+ }
+ }
+
+ assert (last_offset == offset);
+ return offset;
+ }
+
+ private void merge_low (owned Slice<G> a, owned Slice<G> b) {
+ #if DEBUG
+ message ("Merge low (%d, %d) (%d, %d)", a.index, a.length, b.index, b.length);
+ #endif
+ assert (a.length > 0);
+ assert (b.length > 0);
+ assert (a.index + a.length == b.index);
+
+ int minimum_gallop = this.minimum_gallop;
+ int dest = a.index;
+ a.copy ();
+
+ try {
+ list[dest++] = b.pop_first ();
+ if (a.length == 1 || b.length == 0) {
+ return;
+ }
+
+ while (true) {
+ int a_count = 0;
+ int b_count = 0;
+
+ while (true) {
+ if (lower_than (b.peek_first (), a.peek_first ())) {
+ list[dest++] = b.pop_first ();
+ if (b.length == 0) {
+ return;
+ }
+
+ b_count++;
+ a_count = 0;
+ if (b_count >= minimum_gallop) {
+ break;
+ }
+ } else {
+ list[dest++] = a.pop_first ();
+ if (a.length == 1) {
+ return;
+ }
+
+ a_count++;
+ b_count = 0;
+ if (a_count >= minimum_gallop) {
+ break;
+ }
+ }
+ }
+
+ minimum_gallop++;
+
+ while (true) {
+ minimum_gallop -= (minimum_gallop > 1 ? 1 : 0);
+ this.minimum_gallop = minimum_gallop;
+
+ a_count = gallop_rightmost (b.peek_first (), a, 0);
+ a.merge_in (list, a.index, dest, a_count);
+ dest += a_count;
+ a.shorten_start (a_count);
+ if (a.length <= 1) {
+ return;
+ }
+
+ list[dest++] = b.pop_first ();
+ if (b.length == 0) {
+ return;
+ }
+
+ b_count = gallop_leftmost (a.peek_first (), b, 0);
+ b.merge_in (list, b.index, dest, b_count);
+ dest += b_count;
+ b.shorten_start (b_count);
+ if (b.length == 0) {
+ return;
+ }
+
+ list[dest++] = a.pop_first ();
+ if (a.length == 1) {
+ return;
+ }
+
+ if (a_count < MINIMUM_GALLOP && b_count < MINIMUM_GALLOP) {
+ break;
+ }
+ }
+
+ minimum_gallop++;
+ this.minimum_gallop = minimum_gallop;
+ }
+ } finally {
+ assert (a.length >= 0);
+ assert (b.length >= 0);
+ b.merge_in (list, b.index, dest, b.length);
+ a.merge_in (list, a.index, dest + b.length, a.length);
+ }
+ }
+
+ private void merge_high (owned Slice<G> a, owned Slice<G> b) {
+ #if DEBUG
+ message ("Merge high (%d, %d) (%d, %d)", a.index, a.length, b.index, b.length);
+ #endif
+ assert (a.length > 0);
+ assert (b.length > 0);
+ assert (a.index + a.length == b.index);
+
+ int minimum_gallop = this.minimum_gallop;
+ int dest = b.index + b.length;
+ b.copy ();
+
+ try {
+ list[--dest] = a.pop_last ();
+ if (a.length == 0 || b.length == 1) {
+ return;
+ }
+
+ while (true) {
+ int a_count = 0;
+ int b_count = 0;
+
+ while (true) {
+ if (lower_than (b.peek_last (), a.peek_last ())) {
+ list[--dest] = a.pop_last ();
+ if (a.length == 0) {
+ return;
+ }
+
+ a_count++;
+ b_count = 0;
+ if (a_count >= minimum_gallop) {
+ break;
+ }
+ } else {
+ list[--dest] = b.pop_last ();
+ if (b.length == 1) {
+ return;
+ }
+
+ b_count++;
+ a_count = 0;
+ if (b_count >= minimum_gallop) {
+ break;
+ }
+ }
+ }
+
+ minimum_gallop++;
+
+ while (true) {
+ minimum_gallop -= (minimum_gallop > 1 ? 1 : 0);
+ this.minimum_gallop = minimum_gallop;
+
+ int k = gallop_rightmost (b.peek_last (), a, a.length - 1);
+ a_count = a.length - k;
+ a.merge_in_reversed (list, a.index + k, dest - a_count, a_count);
+ dest -= a_count;
+ a.shorten_end (a_count);
+ if (a.length == 0) {
+ return;
+ }
+
+ list[--dest] = b.pop_last ();
+ if (b.length == 1) {
+ return;
+ }
+
+ k = gallop_leftmost (a.peek_last (), b, b.length - 1);
+ b_count = b.length - k;
+ b.merge_in_reversed (list, b.index + k, dest - b_count, b_count);
+ dest -= b_count;
+ b.shorten_end (b_count);
+ if (b.length <= 1) {
+ return;
+ }
+
+ list[--dest] = a.pop_last ();
+ if (a.length == 0) {
+ return;
+ }
+
+ if (a_count < MINIMUM_GALLOP && b_count < MINIMUM_GALLOP) {
+ break;
+ }
+ }
+
+ minimum_gallop++;
+ this.minimum_gallop = minimum_gallop;
+ }
+ } finally {
+ assert (a.length >= 0);
+ assert (b.length >= 0);
+ a.merge_in_reversed (list, a.index, dest - a.length, a.length);
+ b.merge_in_reversed (list, b.index, dest - a.length - b.length, b.length);
+ }
+ }
+
+ [Compact]
+ private class Slice<G> {
+
+ public void** list;
+ public void** new_list;
+ public int index;
+ public int length;
+
+ public Slice (void** list, int index, int length) {
+ this.list = list;
+ this.index = index;
+ this.length = length;
+ }
+
+ ~Slice () {
+ if (new_list != null)
+ free (new_list);
+ }
+
+ public void copy () {
+ new_list = Memory.dup (&list[index], (uint) sizeof (G) * length);
+ list = new_list;
+ index = 0;
+ }
+
+ public inline void merge_in (void** dest_array, int index, int dest_index, int count) {
+ Memory.move (&dest_array[dest_index], &list[index], sizeof (G) * count);
+ }
+
+ public inline void merge_in_reversed (void** dest_array, int index, int dest_index, int count) {
+ Memory.move (&dest_array[dest_index], &list[index], sizeof (G) * count);
+ }
+
+ public inline void shorten_start (int n) {
+ index += n;
+ length -= n;
+ }
+
+ public inline void shorten_end (int n) {
+ length -= n;
+ }
+
+ public inline void* pop_first () {
+ length--;
+ return list[index++];
+ }
+
+ public inline void* pop_last () {
+ length--;
+ return list[index + length];
+ }
+
+ public inline unowned void* peek_first () {
+ return list[index];
+ }
+
+ public inline unowned void* peek_last () {
+ return list[index + length - 1];
+ }
+
+ public void reverse () {
+ int low = index;
+ int high = index + length - 1;
+ while (low < high) {
+ swap (low++, high--);
+ }
+ }
+
+ private inline void swap (int i, int j) {
+ void* temp = list[i];
+ list[i] = list[j];
+ list[j] = temp;
+ }
+ }
+}
+