X-Git-Url: http://git.buserror.net/cgi-bin/gitweb.cgi?p=polintos%2Fscott%2Fpriv.git;a=blobdiff_plain;f=include%2Fc%2B%2B%2Fstl%2Fstl%2F_algo.c;fp=include%2Fc%2B%2B%2Fstl%2Fstl%2F_algo.c;h=79745ba0e8c7f9b0ea52084bc632fbac80956652;hp=0000000000000000000000000000000000000000;hb=173d8903eb9d51a4ea7d7fa3e52dc86c9bb6d4f1;hpb=b024710fe2b60cd4a42a8993b61333d6cdb56ca3

diff --git a/include/c++/stl/stl/_algo.c b/include/c++/stl/stl/_algo.c
new file mode 100644
index 0000000..79745ba
--- /dev/null
+++ b/include/c++/stl/stl/_algo.c
@@ -0,0 +1,2012 @@
+/*
+ *
+ * Copyright (c) 1994
+ * Hewlett-Packard Company
+ *
+ * Copyright (c) 1996,1997
+ * Silicon Graphics Computer Systems, Inc.
+ *
+ * Copyright (c) 1997
+ * Moscow Center for SPARC Technology
+ *
+ * Copyright (c) 1999
+ * Boris Fomitchev
+ *
+ * This material is provided "as is", with absolutely no warranty expressed
+ * or implied. Any use is at your own risk.
+ *
+ * Permission to use or copy this software for any purpose is hereby granted
+ * without fee, provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ *
+ */
+
+#ifndef _STLP_ALGO_C
+#define _STLP_ALGO_C
+
+#if !defined (_STLP_INTERNAL_ALGO_H)
+#  include <stl/_algo.h>
+#endif
+
+#ifndef _STLP_INTERNAL_TEMPBUF_H
+#  include <stl/_tempbuf.h>
+#endif
+
+_STLP_BEGIN_NAMESPACE
+
+_STLP_MOVE_TO_PRIV_NAMESPACE
+
+template <class _BidirectionalIter, class _Distance, class _Compare>
+void __merge_without_buffer(_BidirectionalIter __first,
+                            _BidirectionalIter __middle,
+                            _BidirectionalIter __last,
+                            _Distance __len1, _Distance __len2,
+                            _Compare __comp);
+
+
+template <class _BidirectionalIter1, class _BidirectionalIter2,
+          class _BidirectionalIter3, class _Compare>
+_BidirectionalIter3 __merge_backward(_BidirectionalIter1 __first1,
+                                     _BidirectionalIter1 __last1,
+                                     _BidirectionalIter2 __first2,
+                                     _BidirectionalIter2 __last2,
+                                     _BidirectionalIter3 __result,
+                                     _Compare __comp);
+
+template <class _Tp>
+#if !(defined (__SUNPRO_CC) && (__SUNPRO_CC < 0x420 ))
+inline
+#endif
+const _Tp& __median(const _Tp& __a, const _Tp& __b, const _Tp& __c) {
+  if (__a < __b)
+    if (__b < __c)
+      return __b;
+    else if (__a < __c)
+      return __c;
+    else
+      return __a;
+  else if (__a < __c)
+    return __a;
+  else if (__b < __c)
+    return __c;
+  else
+    return __b;
+}
+
+template <class _Tp, class _Compare>
+#if !(defined (__SUNPRO_CC) && (__SUNPRO_CC < 0x420 ))
+inline
+#endif
+const _Tp&
+__median(const _Tp& __a, const _Tp& __b, const _Tp& __c, _Compare __comp) {
+  if (__comp(__a, __b)) {
+    _STLP_VERBOSE_ASSERT(!__comp(__b, __a), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+    if (__comp(__b, __c)) {
+      _STLP_VERBOSE_ASSERT(!__comp(__c, __b), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+      return __b;
+    }
+    else if (__comp(__a, __c)) {
+      _STLP_VERBOSE_ASSERT(!__comp(__c, __a), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+      return __c;
+    }
+    else
+      return __a;
+  }
+  else if (__comp(__a, __c)) {
+    _STLP_VERBOSE_ASSERT(!__comp(__c, __a), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+    return __a;
+  }
+  else if (__comp(__b, __c)) {
+    _STLP_VERBOSE_ASSERT(!__comp(__c, __b), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+    return __c;
+  }
+  else
+    return __b;
+}
+
+_STLP_MOVE_TO_STD_NAMESPACE
+
+template <class _ForwardIter1, class _ForwardIter2>
+_ForwardIter1 search(_ForwardIter1 __first1, _ForwardIter1 __last1,
+                     _ForwardIter2 __first2, _ForwardIter2 __last2) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first1, __last1))
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first2, __last2))
+  // Test for empty ranges
+  if (__first1 == __last1 || __first2 == __last2)
+    return __first1;
+
+  // Test for a pattern of length 1.
+  _ForwardIter2 __p1(__first2);
+
+  if ( ++__p1 == __last2 )
+    return find(__first1, __last1, *__first2);
+
+  // General case.
+
+  for ( ; ; ) { // __first1 != __last1 will be checked in find below
+    __first1 = find(__first1, __last1, *__first2);
+    if (__first1 == __last1)
+      return __last1;
+
+    _ForwardIter2 __p = __p1;
+    _ForwardIter1 __current = __first1;
+    if (++__current == __last1)
+      return __last1;
+
+    while (*__current == *__p) {
+      if (++__p == __last2)
+        return __first1;
+      if (++__current == __last1)
+        return __last1;
+    }
+
+    ++__first1;
+  }
+  return __first1;
+}
+
+_STLP_MOVE_TO_PRIV_NAMESPACE
+
+template <class _RandomAccessIter, class _Integer, class _Tp,
+          class _BinaryPred, class _Distance>
+_RandomAccessIter __search_n(_RandomAccessIter __first, _RandomAccessIter __last,
+                             _Integer __count, const _Tp& __val, _BinaryPred __pred,
+                             _Distance*, const random_access_iterator_tag &)
+{
+  _Distance __tailSize = __last - __first;
+  const _Distance __pattSize = __count;
+  const _Distance __skipOffset = __pattSize - 1;
+  _RandomAccessIter __backTrack;
+  _Distance __remainder, __prevRemainder;
+
+  for ( _RandomAccessIter __lookAhead = __first + __skipOffset; __tailSize >= __pattSize; __lookAhead += __pattSize ) { // the main loop...
+    //__lookAhead here is always pointing to the last element of next possible match.
+    __tailSize -= __pattSize;
+
+    while ( !__pred(*__lookAhead, __val) ) { // the skip loop...
+      if (__tailSize < __pattSize)
+        return __last;
+
+      __lookAhead += __pattSize;
+      __tailSize -= __pattSize;
+    }
+
+    if ( __skipOffset == 0 ) {
+      return (__lookAhead - __skipOffset); //Success
+    }
+
+    __remainder = __skipOffset;
+
+    for (__backTrack = __lookAhead; __pred(*--__backTrack, __val); ) {
+      if (--__remainder == 0)
+        return (__lookAhead - __skipOffset); //Success
+    }
+
+    if (__remainder > __tailSize)
+      return __last; //failure
+
+    __lookAhead += __remainder;
+    __tailSize -= __remainder;
+
+    while ( __pred(*__lookAhead, __val) ) {
+      __prevRemainder = __remainder;
+      __backTrack = __lookAhead;
+
+      do {
+        if (--__remainder == 0)
+          return (__lookAhead - __skipOffset); //Success
+      } while (__pred(*--__backTrack, __val));
+
+      //adjust remainder for next comparison
+      __remainder += __pattSize - __prevRemainder;
+
+      if (__remainder > __tailSize)
+        return __last; //failure
+
+      __lookAhead += __remainder;
+      __tailSize -= __remainder;
+    }
+
+    //__lookAhead here is always pointing to the element of the last mismatch.
+  }
+
+  return __last; //failure
+}
+
+template <class _ForwardIter, class _Integer, class _Tp,
+          class _Distance, class _BinaryPred>
+_ForwardIter __search_n(_ForwardIter __first, _ForwardIter __last,
+                        _Integer __count, const _Tp& __val, _BinaryPred __pred,
+                        _Distance*, const forward_iterator_tag &) {
+  for (; (__first != __last) && !__pred(*__first, __val); ++__first) {}
+  while (__first != __last) {
+    _Integer __n = __count - 1;
+    _ForwardIter __i = __first;
+    ++__i;
+    while (__i != __last && __n != 0 && __pred(*__i, __val)) {
+      ++__i;
+      --__n;
+    }
+    if (__n == 0)
+      return __first;
+    else if (__i != __last)
+      for (__first = ++__i; (__first != __last) && !__pred(*__first, __val); ++__first) {}
+    else
+      break;
+  }
+  return __last;
+}
+
+_STLP_MOVE_TO_STD_NAMESPACE
+
+// search_n.  Search for __count consecutive copies of __val.
+template <class _ForwardIter, class _Integer, class _Tp>
+_ForwardIter search_n(_ForwardIter __first, _ForwardIter __last,
+                      _Integer __count, const _Tp& __val) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __last))
+  if (__count <= 0)
+    return __first;
+  if (__count == 1)
+    //We use find when __count == 1 to use potential find overload.
+    return find(__first, __last, __val);
+  return _STLP_PRIV __search_n(__first, __last, __count, __val, equal_to<_Tp>(),
+                               _STLP_DISTANCE_TYPE(__first, _ForwardIter),
+                               _STLP_ITERATOR_CATEGORY(__first, _ForwardIter));
+}
+
+template <class _ForwardIter, class _Integer, class _Tp, class _BinaryPred>
+_ForwardIter search_n(_ForwardIter __first, _ForwardIter __last,
+                      _Integer __count, const _Tp& __val,
+                      _BinaryPred __binary_pred) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __last))
+  if (__count <= 0)
+    return __first;
+  return _STLP_PRIV __search_n(__first, __last, __count, __val, __binary_pred,
+                               _STLP_DISTANCE_TYPE(__first, _ForwardIter),
+                               _STLP_ITERATOR_CATEGORY(__first, _ForwardIter));
+}
+
+template <class _ForwardIter1, class _ForwardIter2>
+_ForwardIter1
+find_end(_ForwardIter1 __first1, _ForwardIter1 __last1,
+         _ForwardIter2 __first2, _ForwardIter2 __last2) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first1, __last1))
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first2, __last2))
+  return _STLP_PRIV __find_end(__first1, __last1, __first2, __last2,
+#if defined (_STLP_CLASS_PARTIAL_SPECIALIZATION)
+                               _STLP_ITERATOR_CATEGORY(__first1, _ForwardIter1),
+                               _STLP_ITERATOR_CATEGORY(__first2, _ForwardIter2),
+#else
+                               forward_iterator_tag(),
+                               forward_iterator_tag(),
+#endif
+                               _STLP_PRIV __equal_to(_STLP_VALUE_TYPE(__first1, _ForwardIter1))
+    );
+}
+
+// unique and unique_copy
+_STLP_MOVE_TO_PRIV_NAMESPACE
+
+template <class _InputIterator, class _OutputIterator, class _BinaryPredicate,
+          class _Tp>
+_STLP_INLINE_LOOP _OutputIterator
+__unique_copy(_InputIterator __first, _InputIterator __last,
+              _OutputIterator __result,
+              _BinaryPredicate __binary_pred, _Tp*) {
+  _Tp __val = *__first;
+  *__result = __val;
+  while (++__first != __last)
+    if (!__binary_pred(__val, *__first)) {
+      __val = *__first;
+      *++__result = __val;
+    }
+  return ++__result;
+}
+
+template <class _InputIter, class _OutputIter, class _BinaryPredicate>
+inline _OutputIter
+__unique_copy(_InputIter __first, _InputIter __last,_OutputIter __result,
+              _BinaryPredicate __binary_pred, const output_iterator_tag &) {
+  return __unique_copy(__first, __last, __result, __binary_pred, _STLP_VALUE_TYPE(__first, _InputIter));
+}
+
+template <class _InputIter, class _ForwardIter, class _BinaryPredicate>
+_STLP_INLINE_LOOP _ForwardIter
+__unique_copy(_InputIter __first, _InputIter __last, _ForwardIter __result,
+              _BinaryPredicate __binary_pred, const forward_iterator_tag &) {
+  *__result = *__first;
+  while (++__first != __last)
+    if (!__binary_pred(*__result, *__first)) *++__result = *__first;
+  return ++__result;
+}
+
+#if defined (_STLP_NONTEMPL_BASE_MATCH_BUG)
+template <class _InputIterator, class _BidirectionalIterator, class _BinaryPredicate>
+inline _BidirectionalIterator
+__unique_copy(_InputIterator __first, _InputIterator __last,
+              _BidirectionalIterator __result, _BinaryPredicate __binary_pred,
+              const bidirectional_iterator_tag &) {
+  return __unique_copy(__first, __last, __result, __binary_pred, forward_iterator_tag());
+}
+
+template <class _InputIterator, class _RandomAccessIterator, class _BinaryPredicate>
+inline _RandomAccessIterator
+__unique_copy(_InputIterator __first, _InputIterator __last,
+              _RandomAccessIterator __result, _BinaryPredicate __binary_pred,
+              const random_access_iterator_tag &) {
+  return __unique_copy(__first, __last, __result, __binary_pred, forward_iterator_tag());
+}
+#endif /* _STLP_NONTEMPL_BASE_MATCH_BUG */
+
+_STLP_MOVE_TO_STD_NAMESPACE
+
+template <class _InputIter, class _OutputIter>
+_OutputIter
+unique_copy(_InputIter __first, _InputIter __last, _OutputIter __result) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __last))
+  if (__first == __last) return __result;
+  return _STLP_PRIV __unique_copy(__first, __last, __result,
+                                  _STLP_PRIV __equal_to(_STLP_VALUE_TYPE(__first, _InputIter)),
+                                  _STLP_ITERATOR_CATEGORY(__result, _OutputIter));
+}
+
+template <class _InputIter, class _OutputIter, class _BinaryPredicate>
+_OutputIter
+unique_copy(_InputIter __first, _InputIter __last,_OutputIter __result,
+            _BinaryPredicate __binary_pred) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __last))
+  if (__first == __last) return __result;
+  return _STLP_PRIV __unique_copy(__first, __last, __result, __binary_pred,
+                                  _STLP_ITERATOR_CATEGORY(__result, _OutputIter));
+}
+
+// rotate and rotate_copy, and their auxiliary functions
+_STLP_MOVE_TO_PRIV_NAMESPACE
+
+template <class _ForwardIter, class _Distance>
+_ForwardIter __rotate_aux(_ForwardIter __first,
+                          _ForwardIter __middle,
+                          _ForwardIter __last,
+                          _Distance*,
+                          const forward_iterator_tag &) {
+  if (__first == __middle)
+    return __last;
+  if (__last  == __middle)
+    return __first;
+
+  _ForwardIter __first2 = __middle;
+  do {
+    swap(*__first++, *__first2++);
+    if (__first == __middle)
+      __middle = __first2;
+  } while (__first2 != __last);
+
+  _ForwardIter __new_middle = __first;
+
+  __first2 = __middle;
+
+  while (__first2 != __last) {
+    swap (*__first++, *__first2++);
+    if (__first == __middle)
+      __middle = __first2;
+    else if (__first2 == __last)
+      __first2 = __middle;
+  }
+
+  return __new_middle;
+}
+
+template <class _BidirectionalIter, class _Distance>
+_BidirectionalIter __rotate_aux(_BidirectionalIter __first,
+                                _BidirectionalIter __middle,
+                                _BidirectionalIter __last,
+                                _Distance*,
+                                const bidirectional_iterator_tag &) {
+  if (__first == __middle)
+    return __last;
+  if (__last  == __middle)
+    return __first;
+
+  __reverse(__first,  __middle, bidirectional_iterator_tag());
+  __reverse(__middle, __last,   bidirectional_iterator_tag());
+
+  while (__first != __middle && __middle != __last)
+    swap (*__first++, *--__last);
+
+  if (__first == __middle) {
+    __reverse(__middle, __last,   bidirectional_iterator_tag());
+    return __last;
+  }
+  else {
+    __reverse(__first,  __middle, bidirectional_iterator_tag());
+    return __first;
+  }
+}
+
+template <class _RandomAccessIter, class _Distance, class _Tp>
+_RandomAccessIter __rotate_aux(_RandomAccessIter __first,
+                               _RandomAccessIter __middle,
+                               _RandomAccessIter __last,
+                               _Distance *, _Tp *) {
+
+  _Distance __n = __last   - __first;
+  _Distance __k = __middle - __first;
+  _Distance __l = __n - __k;
+  _RandomAccessIter __result = __first + (__last - __middle);
+
+  if (__k == 0)  /* __first == middle */
+    return __last;
+
+  if (__k == __l) {
+    swap_ranges(__first, __middle, __middle);
+    return __result;
+  }
+
+  _Distance __d = __gcd(__n, __k);
+
+  for (_Distance __i = 0; __i < __d; __i++) {
+    _Tp __tmp = *__first;
+    _RandomAccessIter __p = __first;
+
+    if (__k < __l) {
+      for (_Distance __j = 0; __j < __l/__d; __j++) {
+        if (__p > __first + __l) {
+          *__p = *(__p - __l);
+          __p -= __l;
+        }
+
+        *__p = *(__p + __k);
+        __p += __k;
+      }
+    }
+
+    else {
+      for (_Distance __j = 0; __j < __k/__d - 1; __j ++) {
+        if (__p < __last - __k) {
+          *__p = *(__p + __k);
+          __p += __k;
+        }
+
+        *__p = * (__p - __l);
+        __p -= __l;
+      }
+    }
+
+    *__p = __tmp;
+    ++__first;
+  }
+
+  return __result;
+}
+
+template <class _RandomAccessIter, class _Distance>
+inline _RandomAccessIter
+__rotate_aux(_RandomAccessIter __first, _RandomAccessIter __middle, _RandomAccessIter __last,
+             _Distance * __dis, const random_access_iterator_tag &) {
+  return __rotate_aux(__first, __middle, __last,
+                      __dis, _STLP_VALUE_TYPE(__first, _RandomAccessIter));
+}
+
+template <class _ForwardIter>
+_ForwardIter
+__rotate(_ForwardIter __first, _ForwardIter __middle, _ForwardIter __last) {
+  _STLP_DEBUG_CHECK(__check_range(__first, __middle))
+  _STLP_DEBUG_CHECK(__check_range(__middle, __last))
+  return __rotate_aux(__first, __middle, __last,
+                      _STLP_DISTANCE_TYPE(__first, _ForwardIter),
+                      _STLP_ITERATOR_CATEGORY(__first, _ForwardIter));
+}
+
+_STLP_MOVE_TO_STD_NAMESPACE
+
+template <class _ForwardIter>
+void rotate(_ForwardIter __first, _ForwardIter __middle, _ForwardIter __last) {
+  _STLP_PRIV __rotate(__first, __middle, __last);
+}
+
+// Return a random number in the range [0, __n).  This function encapsulates
+// whether we're using rand (part of the standard C library) or lrand48
+// (not standard, but a much better choice whenever it's available).
+_STLP_MOVE_TO_PRIV_NAMESPACE
+
+template <class _Distance>
+inline _Distance __random_number(_Distance __n) {
+#ifdef _STLP_NO_DRAND48
+  return rand() % __n;
+#else
+  return lrand48() % __n;
+#endif
+}
+
+_STLP_MOVE_TO_STD_NAMESPACE
+
+template <class _RandomAccessIter>
+void random_shuffle(_RandomAccessIter __first,
+                    _RandomAccessIter __last) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __last))
+  if (__first == __last) return;
+  for (_RandomAccessIter __i = __first + 1; __i != __last; ++__i)
+    iter_swap(__i, __first + _STLP_PRIV __random_number((__i - __first) + 1));
+}
+
+template <class _RandomAccessIter, class _RandomNumberGenerator>
+void random_shuffle(_RandomAccessIter __first, _RandomAccessIter __last,
+                    _RandomNumberGenerator &__rand) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __last))
+  if (__first == __last) return;
+  for (_RandomAccessIter __i = __first + 1; __i != __last; ++__i)
+    iter_swap(__i, __first + __rand((__i - __first) + 1));
+}
+
+#if !defined (_STLP_NO_EXTENSIONS)
+// random_sample and random_sample_n (extensions, not part of the standard).
+template <class _ForwardIter, class _OutputIter, class _Distance>
+_OutputIter random_sample_n(_ForwardIter __first, _ForwardIter __last,
+                            _OutputIter __out_ite, const _Distance __n) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __last))
+  _Distance __remaining = distance(__first, __last);
+  _Distance __m = (min) (__n, __remaining);
+
+  while (__m > 0) {
+    if (_STLP_PRIV __random_number(__remaining) < __m) {
+      *__out_ite = *__first;
+      ++__out_ite;
+      --__m;
+    }
+
+    --__remaining;
+    ++__first;
+  }
+  return __out_ite;
+}
+
+
+template <class _ForwardIter, class _OutputIter, class _Distance,
+          class _RandomNumberGenerator>
+_OutputIter random_sample_n(_ForwardIter __first, _ForwardIter __last,
+                            _OutputIter __out_ite, const _Distance __n,
+                            _RandomNumberGenerator& __rand) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __last))
+  _Distance __remaining = distance(__first, __last);
+  _Distance __m = (min) (__n, __remaining);
+
+  while (__m > 0) {
+    if (__rand(__remaining) < __m) {
+      *__out_ite = *__first;
+      ++__out_ite;
+      --__m;
+    }
+
+    --__remaining;
+    ++__first;
+  }
+  return __out_ite;
+}
+
+_STLP_MOVE_TO_PRIV_NAMESPACE
+
+template <class _InputIter, class _RandomAccessIter, class _Distance>
+_RandomAccessIter __random_sample(_InputIter __first, _InputIter __last,
+                                  _RandomAccessIter __out_ite,
+                                  const _Distance __n) {
+  _Distance __m = 0;
+  _Distance __t = __n;
+  for ( ; __first != __last && __m < __n; ++__m, ++__first)
+    __out_ite[__m] = *__first;
+
+  while (__first != __last) {
+    ++__t;
+    _Distance __M = __random_number(__t);
+    if (__M < __n)
+      __out_ite[__M] = *__first;
+    ++__first;
+  }
+
+  return __out_ite + __m;
+}
+
+template <class _InputIter, class _RandomAccessIter,
+          class _RandomNumberGenerator, class _Distance>
+_RandomAccessIter __random_sample(_InputIter __first, _InputIter __last,
+                                  _RandomAccessIter __out_ite,
+                                  _RandomNumberGenerator& __rand,
+                                  const _Distance __n) {
+  _Distance __m = 0;
+  _Distance __t = __n;
+  for ( ; __first != __last && __m < __n; ++__m, ++__first)
+    __out_ite[__m] = *__first;
+
+  while (__first != __last) {
+    ++__t;
+    _Distance __M = __rand(__t);
+    if (__M < __n)
+      __out_ite[__M] = *__first;
+    ++__first;
+  }
+
+  return __out_ite + __m;
+}
+
+_STLP_MOVE_TO_STD_NAMESPACE
+
+template <class _InputIter, class _RandomAccessIter>
+_RandomAccessIter
+random_sample(_InputIter __first, _InputIter __last,
+              _RandomAccessIter __out_first, _RandomAccessIter __out_last) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __last))
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__out_first, __out_last))
+  return _STLP_PRIV __random_sample(__first, __last,
+                                    __out_first, __out_last - __out_first);
+}
+
+template <class _InputIter, class _RandomAccessIter, class _RandomNumberGenerator>
+_RandomAccessIter
+random_sample(_InputIter __first, _InputIter __last,
+              _RandomAccessIter __out_first, _RandomAccessIter __out_last,
+              _RandomNumberGenerator& __rand) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __last))
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__out_first, __out_last))
+  return _STLP_PRIV __random_sample(__first, __last,
+                                    __out_first, __rand,
+                                    __out_last - __out_first);
+}
+
+#endif /* _STLP_NO_EXTENSIONS */
+
+// partition, stable_partition, and their auxiliary functions
+_STLP_MOVE_TO_PRIV_NAMESPACE
+
+template <class _ForwardIter, class _Predicate>
+_STLP_INLINE_LOOP _ForwardIter __partition(_ForwardIter __first,
+                                           _ForwardIter __last,
+                                           _Predicate   __pred,
+                                           const forward_iterator_tag &) {
+  if (__first == __last) return __first;
+
+  while (__pred(*__first))
+    if (++__first == __last) return __first;
+
+  _ForwardIter __next = __first;
+
+  while (++__next != __last) {
+    if (__pred(*__next)) {
+      swap(*__first, *__next);
+      ++__first;
+    }
+  }
+  return __first;
+}
+
+template <class _BidirectionalIter, class _Predicate>
+_STLP_INLINE_LOOP _BidirectionalIter __partition(_BidirectionalIter __first,
+                                                 _BidirectionalIter __last,
+                                                 _Predicate __pred,
+                                                 const bidirectional_iterator_tag &) {
+  for (;;) {
+    for (;;) {
+      if (__first == __last)
+        return __first;
+      else if (__pred(*__first))
+        ++__first;
+      else
+        break;
+    }
+    --__last;
+    for (;;) {
+      if (__first == __last)
+        return __first;
+      else if (!__pred(*__last))
+        --__last;
+      else
+        break;
+    }
+    iter_swap(__first, __last);
+    ++__first;
+  }
+}
+
+#if defined (_STLP_NONTEMPL_BASE_MATCH_BUG)
+template <class _BidirectionalIter, class _Predicate>
+inline
+_BidirectionalIter __partition(_BidirectionalIter __first,
+                               _BidirectionalIter __last,
+                               _Predicate __pred,
+                               const random_access_iterator_tag &) {
+  return __partition(__first, __last, __pred, bidirectional_iterator_tag());
+}
+#endif
+
+_STLP_MOVE_TO_STD_NAMESPACE
+
+template <class _ForwardIter, class _Predicate>
+_ForwardIter partition(_ForwardIter __first, _ForwardIter __last, _Predicate   __pred) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __last))
+  return _STLP_PRIV __partition(__first, __last, __pred, _STLP_ITERATOR_CATEGORY(__first, _ForwardIter));
+}
+
+
+/* __pred_of_first: false if we know that __pred(*__first) is false,
+ *                  true when we don't know the result of __pred(*__first).
+ * __not_pred_of_before_last: true if we know that __pred(*--__last) is true,
+ *                            false when we don't know the result of __pred(*--__last).
+ */
+_STLP_MOVE_TO_PRIV_NAMESPACE
+
+template <class _ForwardIter, class _Predicate, class _Distance>
+_ForwardIter __inplace_stable_partition(_ForwardIter __first,
+                                        _ForwardIter __last,
+                                        _Predicate __pred, _Distance __len,
+                                        bool __pred_of_first, bool __pred_of_before_last) {
+  if (__len == 1)
+    return (__pred_of_first && (__pred_of_before_last || __pred(*__first))) ? __last : __first;
+  _ForwardIter __middle = __first;
+  _Distance __half_len = __len / 2;
+  advance(__middle, __half_len);
+  return __rotate(__inplace_stable_partition(__first, __middle, __pred, __half_len, __pred_of_first, false),
+                  __middle,
+                  __inplace_stable_partition(__middle, __last, __pred, __len - __half_len, true, __pred_of_before_last));
+}
+
+template <class _ForwardIter, class _Pointer, class _Predicate,
+          class _Distance>
+_ForwardIter __stable_partition_adaptive(_ForwardIter __first,
+                                         _ForwardIter __last,
+                                         _Predicate __pred, _Distance __len,
+                                         _Pointer __buffer, _Distance __buffer_size,
+                                         bool __pred_of_first, bool __pred_of_before_last) {
+  if (__len <= __buffer_size) {
+    _ForwardIter __result1 = __first;
+    _Pointer __result2 = __buffer;
+    if ((__first != __last) && (!__pred_of_first || __pred(*__first))) {
+      *__result2 = *__first;
+      ++__result2; ++__first; --__len;
+    }
+    for (; __first != __last ; ++__first, --__len) {
+      if (((__len == 1) && (__pred_of_before_last || __pred(*__first))) ||
+          ((__len != 1) && __pred(*__first))){
+        *__result1 = *__first;
+        ++__result1;
+      }
+      else {
+        *__result2 = *__first;
+        ++__result2;
+      }
+    }
+    copy(__buffer, __result2, __result1);
+    return __result1;
+  }
+  else {
+    _ForwardIter __middle = __first;
+    _Distance __half_len = __len / 2;
+    advance(__middle, __half_len);
+    return __rotate(__stable_partition_adaptive(
+                          __first, __middle, __pred,
+                          __half_len, __buffer, __buffer_size,
+                          __pred_of_first, false),
+                    __middle,
+                    __stable_partition_adaptive(
+                          __middle, __last, __pred,
+                          __len - __half_len, __buffer, __buffer_size,
+                          true, __pred_of_before_last));
+  }
+}
+
+template <class _ForwardIter, class _Predicate, class _Tp, class _Distance>
+inline _ForwardIter
+__stable_partition_aux_aux(_ForwardIter __first, _ForwardIter __last,
+                           _Predicate __pred, _Tp*, _Distance*, bool __pred_of_before_last = false) {
+  _Temporary_buffer<_ForwardIter, _Tp> __buf(__first, __last);
+  _STLP_MPWFIX_TRY    //*TY 06/01/2000 - they forget to call dtor for _Temporary_buffer if no try/catch block is present
+  return (__buf.size() > 0) ?
+    __stable_partition_adaptive(__first, __last, __pred,
+                                _Distance(__buf.requested_size()),
+                                __buf.begin(), __buf.size(),
+                                false, __pred_of_before_last)  :
+    __inplace_stable_partition(__first, __last, __pred,
+                               _Distance(__buf.requested_size()),
+                               false, __pred_of_before_last);
+  _STLP_MPWFIX_CATCH  //*TY 06/01/2000 - they forget to call dtor for _Temporary_buffer if no try/catch block is present
+}
+
+template <class _ForwardIter, class _Predicate>
+_ForwardIter
+__stable_partition_aux(_ForwardIter __first, _ForwardIter __last, _Predicate __pred,
+                       const forward_iterator_tag &) {
+  return __stable_partition_aux_aux(__first, __last, __pred,
+                                    _STLP_VALUE_TYPE(__first, _ForwardIter),
+                                    _STLP_DISTANCE_TYPE(__first, _ForwardIter));
+}
+
+template <class _BidirectIter, class _Predicate>
+_BidirectIter
+__stable_partition_aux(_BidirectIter __first, _BidirectIter __last, _Predicate __pred,
+                       const bidirectional_iterator_tag &) {
+  for (--__last;;) {
+    if (__first == __last)
+      return __first;
+    else if (!__pred(*__last))
+      --__last;
+    else
+      break;
+  }
+  ++__last;
+  //Here we know that __pred(*--__last) is true
+  return __stable_partition_aux_aux(__first, __last, __pred,
+                                    _STLP_VALUE_TYPE(__first, _BidirectIter),
+                                    _STLP_DISTANCE_TYPE(__first, _BidirectIter), true);
+}
+
+#if defined (_STLP_NONTEMPL_BASE_MATCH_BUG)
+template <class _BidirectIter, class _Predicate>
+_BidirectIter
+__stable_partition_aux(_BidirectIter __first, _BidirectIter __last, _Predicate __pred,
+                       const random_access_iterator_tag &) {
+  return __stable_partition_aux(__first, __last, __pred, bidirectional_iterator_tag());
+}
+#endif
+
+_STLP_MOVE_TO_STD_NAMESPACE
+
+template <class _ForwardIter, class _Predicate>
+_ForwardIter
+stable_partition(_ForwardIter __first, _ForwardIter __last, _Predicate __pred) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __last))
+  for (;;) {
+    if (__first == __last)
+      return __first;
+    else if (__pred(*__first))
+      ++__first;
+    else
+      break;
+  }
+  return _STLP_PRIV __stable_partition_aux(__first, __last, __pred,
+                                           _STLP_ITERATOR_CATEGORY(__first, _ForwardIter));
+}
+
+_STLP_MOVE_TO_PRIV_NAMESPACE
+
+template <class _RandomAccessIter, class _Tp, class _Compare>
+_RandomAccessIter __unguarded_partition(_RandomAccessIter __first,
+                                        _RandomAccessIter __last,
+                                        _Tp __pivot, _Compare __comp) {
+  for (;;) {
+    while (__comp(*__first, __pivot)) {
+      _STLP_VERBOSE_ASSERT(!__comp(__pivot, *__first), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+      ++__first;
+    }
+    --__last;
+    while (__comp(__pivot, *__last)) {
+      _STLP_VERBOSE_ASSERT(!__comp(*__last, __pivot), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+      --__last;
+    }
+    if (!(__first < __last))
+      return __first;
+    iter_swap(__first, __last);
+    ++__first;
+  }
+}
+
+// sort() and its auxiliary functions.
+#define __stl_threshold  16
+
+template <class _RandomAccessIter, class _Tp, class _Compare>
+void __unguarded_linear_insert(_RandomAccessIter __last, _Tp __val,
+                               _Compare __comp) {
+  _RandomAccessIter __next = __last;
+  --__next;
+  while (__comp(__val, *__next)) {
+    _STLP_VERBOSE_ASSERT(!__comp(*__next, __val), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+    *__last = *__next;
+    __last = __next;
+    --__next;
+  }
+  *__last = __val;
+}
+
+template <class _RandomAccessIter, class _Tp, class _Compare>
+inline void __linear_insert(_RandomAccessIter __first,
+                            _RandomAccessIter __last, _Tp __val, _Compare __comp) {
+  //*TY 12/26/1998 - added __val as a paramter
+  //  _Tp __val = *__last;        //*TY 12/26/1998 - __val supplied by caller
+  if (__comp(__val, *__first)) {
+    _STLP_VERBOSE_ASSERT(!__comp(*__first, __val), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+    copy_backward(__first, __last, __last + 1);
+    *__first = __val;
+  }
+  else
+    __unguarded_linear_insert(__last, __val, __comp);
+}
+
+template <class _RandomAccessIter, class _Tp, class _Compare>
+void __insertion_sort(_RandomAccessIter __first,
+                      _RandomAccessIter __last,
+                      _Tp *, _Compare __comp) {
+  if (__first == __last) return;
+  for (_RandomAccessIter __i = __first + 1; __i != __last; ++__i)
+    __linear_insert<_RandomAccessIter, _Tp, _Compare>(__first, __i, *__i, __comp);  //*TY 12/26/1998 - supply *__i as __val
+}
+
+template <class _RandomAccessIter, class _Tp, class _Compare>
+void __unguarded_insertion_sort_aux(_RandomAccessIter __first,
+                                    _RandomAccessIter __last,
+                                    _Tp*, _Compare __comp) {
+  for (_RandomAccessIter __i = __first; __i != __last; ++__i)
+    __unguarded_linear_insert<_RandomAccessIter, _Tp, _Compare>(__i, *__i, __comp);
+}
+
+template <class _RandomAccessIter, class _Compare>
+inline void __unguarded_insertion_sort(_RandomAccessIter __first,
+                                       _RandomAccessIter __last,
+                                       _Compare __comp) {
+  __unguarded_insertion_sort_aux(__first, __last, _STLP_VALUE_TYPE(__first, _RandomAccessIter), __comp);
+}
+
+template <class _RandomAccessIter, class _Compare>
+void __final_insertion_sort(_RandomAccessIter __first,
+                            _RandomAccessIter __last, _Compare __comp) {
+  if (__last - __first > __stl_threshold) {
+    __insertion_sort(__first, __first + __stl_threshold, _STLP_VALUE_TYPE(__first,_RandomAccessIter), __comp);
+    __unguarded_insertion_sort(__first + __stl_threshold, __last, __comp);
+  }
+  else
+    __insertion_sort(__first, __last, _STLP_VALUE_TYPE(__first,_RandomAccessIter), __comp);
+}
+
+template <class _RandomAccessIter, class _Tp, class _Size, class _Compare>
+void __introsort_loop(_RandomAccessIter __first,
+                      _RandomAccessIter __last, _Tp*,
+                      _Size __depth_limit, _Compare __comp) {
+  while (__last - __first > __stl_threshold) {
+    if (__depth_limit == 0) {
+      partial_sort(__first, __last, __last, __comp);
+      return;
+    }
+    --__depth_limit;
+    _RandomAccessIter __cut =
+      __unguarded_partition(__first, __last,
+                            _Tp(__median(*__first,
+                                         *(__first + (__last - __first)/2),
+                                         *(__last - 1), __comp)),
+       __comp);
+    __introsort_loop(__cut, __last, (_Tp*) 0, __depth_limit, __comp);
+    __last = __cut;
+  }
+}
+
+_STLP_MOVE_TO_STD_NAMESPACE
+
+template <class _RandomAccessIter>
+void sort(_RandomAccessIter __first, _RandomAccessIter __last) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __last))
+  if (__first != __last) {
+    _STLP_PRIV __introsort_loop(__first, __last,
+                                _STLP_VALUE_TYPE(__first, _RandomAccessIter),
+                                _STLP_PRIV __lg(__last - __first) * 2,
+                                _STLP_PRIV __less(_STLP_VALUE_TYPE(__first, _RandomAccessIter)));
+    _STLP_PRIV __final_insertion_sort(__first, __last,
+                                      _STLP_PRIV __less(_STLP_VALUE_TYPE(__first, _RandomAccessIter)));
+  }
+}
+
+template <class _RandomAccessIter, class _Compare>
+void sort(_RandomAccessIter __first, _RandomAccessIter __last, _Compare __comp) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __last))
+  if (__first != __last) {
+    _STLP_PRIV __introsort_loop(__first, __last,
+                                _STLP_VALUE_TYPE(__first, _RandomAccessIter),
+                                _STLP_PRIV __lg(__last - __first) * 2, __comp);
+    _STLP_PRIV __final_insertion_sort(__first, __last, __comp);
+  }
+}
+
+// stable_sort() and its auxiliary functions.
+_STLP_MOVE_TO_PRIV_NAMESPACE
+
+template <class _RandomAccessIter, class _Compare>
+void __inplace_stable_sort(_RandomAccessIter __first,
+                           _RandomAccessIter __last, _Compare __comp) {
+  if (__last - __first < 15) {
+    __insertion_sort(__first, __last, _STLP_VALUE_TYPE(__first,_RandomAccessIter), __comp);
+    return;
+  }
+  _RandomAccessIter __middle = __first + (__last - __first) / 2;
+  __inplace_stable_sort(__first, __middle, __comp);
+  __inplace_stable_sort(__middle, __last, __comp);
+  __merge_without_buffer(__first, __middle, __last,
+                         __middle - __first,
+                         __last - __middle,
+                         __comp);
+}
+
+template <class _RandomAccessIter1, class _RandomAccessIter2,
+          class _Distance, class _Compare>
+void __merge_sort_loop(_RandomAccessIter1 __first,
+                       _RandomAccessIter1 __last,
+                       _RandomAccessIter2 __result, _Distance __step_size,
+                       _Compare __comp) {
+  _Distance __two_step = 2 * __step_size;
+
+  while (__last - __first >= __two_step) {
+    __result = merge(__first, __first + __step_size,
+                     __first + __step_size, __first + __two_step,
+                     __result,
+                     __comp);
+    __first += __two_step;
+  }
+  __step_size = (min) (_Distance(__last - __first), __step_size);
+
+  merge(__first, __first + __step_size,
+        __first + __step_size, __last,
+        __result,
+        __comp);
+}
+
+const int __stl_chunk_size = 7;
+
+template <class _RandomAccessIter, class _Distance, class _Compare>
+void __chunk_insertion_sort(_RandomAccessIter __first,
+                            _RandomAccessIter __last,
+                            _Distance __chunk_size, _Compare __comp) {
+  while (__last - __first >= __chunk_size) {
+    __insertion_sort(__first, __first + __chunk_size,
+                     _STLP_VALUE_TYPE(__first,_RandomAccessIter), __comp);
+    __first += __chunk_size;
+  }
+  __insertion_sort(__first, __last, _STLP_VALUE_TYPE(__first,_RandomAccessIter), __comp);
+}
+
+template <class _RandomAccessIter, class _Pointer, class _Distance,
+          class _Compare>
+void __merge_sort_with_buffer(_RandomAccessIter __first,
+                              _RandomAccessIter __last, _Pointer __buffer,
+                              _Distance*, _Compare __comp) {
+  _Distance __len = __last - __first;
+  _Pointer __buffer_last = __buffer + __len;
+
+  _Distance __step_size = __stl_chunk_size;
+  __chunk_insertion_sort(__first, __last, __step_size, __comp);
+
+  while (__step_size < __len) {
+    __merge_sort_loop(__first, __last, __buffer, __step_size, __comp);
+    __step_size *= 2;
+    __merge_sort_loop(__buffer, __buffer_last, __first, __step_size, __comp);
+    __step_size *= 2;
+  }
+}
+
+template <class _BidirectionalIter1, class _BidirectionalIter2,
+          class _Distance>
+_BidirectionalIter1 __rotate_adaptive(_BidirectionalIter1 __first,
+                                      _BidirectionalIter1 __middle,
+                                      _BidirectionalIter1 __last,
+                                      _Distance __len1, _Distance __len2,
+                                      _BidirectionalIter2 __buffer,
+                                      _Distance __buffer_size) {
+  if (__len1 > __len2 && __len2 <= __buffer_size) {
+    _BidirectionalIter2 __buffer_end = copy(__middle, __last, __buffer);
+    copy_backward(__first, __middle, __last);
+    return copy(__buffer, __buffer_end, __first);
+  }
+  else if (__len1 <= __buffer_size) {
+    _BidirectionalIter2 __buffer_end = copy(__first, __middle, __buffer);
+    copy(__middle, __last, __first);
+    return copy_backward(__buffer, __buffer_end, __last);
+  }
+  else
+    return __rotate(__first, __middle, __last);
+}
+
+template <class _BidirectionalIter, class _Distance, class _Pointer,
+          class _Compare>
+void __merge_adaptive(_BidirectionalIter __first,
+                      _BidirectionalIter __middle,
+                      _BidirectionalIter __last,
+                      _Distance __len1, _Distance __len2,
+                      _Pointer __buffer, _Distance __buffer_size,
+                      _Compare __comp) {
+  if (__len1 <= __len2 && __len1 <= __buffer_size) {
+    _Pointer __buffer_end = copy(__first, __middle, __buffer);
+    merge(__buffer, __buffer_end, __middle, __last, __first, __comp);
+  }
+  else if (__len2 <= __buffer_size) {
+    _Pointer __buffer_end = copy(__middle, __last, __buffer);
+    __merge_backward(__first, __middle, __buffer, __buffer_end, __last,
+                     __comp);
+  }
+  else {
+    _BidirectionalIter __first_cut = __first;
+    _BidirectionalIter __second_cut = __middle;
+    _Distance __len11 = 0;
+    _Distance __len22 = 0;
+    if (__len1 > __len2) {
+      __len11 = __len1 / 2;
+      advance(__first_cut, __len11);
+      __second_cut = lower_bound(__middle, __last, *__first_cut, __comp);
+      __len22 += distance(__middle, __second_cut);
+    }
+    else {
+      __len22 = __len2 / 2;
+      advance(__second_cut, __len22);
+      __first_cut = upper_bound(__first, __middle, *__second_cut, __comp);
+      __len11 += distance(__first, __first_cut);
+    }
+    _BidirectionalIter __new_middle =
+      __rotate_adaptive(__first_cut, __middle, __second_cut, __len1 - __len11,
+                        __len22, __buffer, __buffer_size);
+    __merge_adaptive(__first, __first_cut, __new_middle, __len11,
+                     __len22, __buffer, __buffer_size, __comp);
+    __merge_adaptive(__new_middle, __second_cut, __last, __len1 - __len11,
+                     __len2 - __len22, __buffer, __buffer_size, __comp);
+  }
+}
+
+template <class _RandomAccessIter, class _Pointer, class _Distance,
+          class _Compare>
+void __stable_sort_adaptive(_RandomAccessIter __first,
+                            _RandomAccessIter __last, _Pointer __buffer,
+                            _Distance __buffer_size, _Compare __comp) {
+  _Distance __len = (__last - __first + 1) / 2;
+  _RandomAccessIter __middle = __first + __len;
+  if (__len > __buffer_size) {
+    __stable_sort_adaptive(__first, __middle, __buffer, __buffer_size,
+                           __comp);
+    __stable_sort_adaptive(__middle, __last, __buffer, __buffer_size,
+                           __comp);
+  }
+  else {
+    __merge_sort_with_buffer(__first, __middle, __buffer, (_Distance*)0,
+                               __comp);
+    __merge_sort_with_buffer(__middle, __last, __buffer, (_Distance*)0,
+                               __comp);
+  }
+  __merge_adaptive(__first, __middle, __last, _Distance(__middle - __first),
+                   _Distance(__last - __middle), __buffer, __buffer_size,
+                   __comp);
+}
+
+template <class _RandomAccessIter, class _Tp, class _Distance, class _Compare>
+void __stable_sort_aux(_RandomAccessIter __first,
+                       _RandomAccessIter __last, _Tp*, _Distance*,
+                       _Compare __comp) {
+  _Temporary_buffer<_RandomAccessIter, _Tp> buf(__first, __last);
+  if (buf.begin() == 0)
+    __inplace_stable_sort(__first, __last, __comp);
+  else
+    __stable_sort_adaptive(__first, __last, buf.begin(),
+                           _Distance(buf.size()),
+                           __comp);
+}
+
+_STLP_MOVE_TO_STD_NAMESPACE
+
+template <class _RandomAccessIter>
+void stable_sort(_RandomAccessIter __first,
+                 _RandomAccessIter __last) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __last))
+  _STLP_PRIV __stable_sort_aux(__first, __last,
+                               _STLP_VALUE_TYPE(__first, _RandomAccessIter),
+                               _STLP_DISTANCE_TYPE(__first, _RandomAccessIter),
+                               _STLP_PRIV __less(_STLP_VALUE_TYPE(__first, _RandomAccessIter)));
+}
+
+template <class _RandomAccessIter, class _Compare>
+void stable_sort(_RandomAccessIter __first,
+                 _RandomAccessIter __last, _Compare __comp) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __last))
+  _STLP_PRIV __stable_sort_aux(__first, __last,
+                               _STLP_VALUE_TYPE(__first, _RandomAccessIter),
+                               _STLP_DISTANCE_TYPE(__first, _RandomAccessIter),
+                               __comp);
+}
+
+// partial_sort, partial_sort_copy, and auxiliary functions.
+_STLP_MOVE_TO_PRIV_NAMESPACE
+
+template <class _RandomAccessIter, class _Tp, class _Compare>
+void __partial_sort(_RandomAccessIter __first, _RandomAccessIter __middle,
+                    _RandomAccessIter __last, _Tp*, _Compare __comp) {
+  make_heap(__first, __middle, __comp);
+  for (_RandomAccessIter __i = __middle; __i < __last; ++__i) {
+    if (__comp(*__i, *__first)) {
+      _STLP_VERBOSE_ASSERT(!__comp(*__first, *__i), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+      __pop_heap(__first, __middle, __i, _Tp(*__i), __comp,
+                 _STLP_DISTANCE_TYPE(__first, _RandomAccessIter));
+    }
+  }
+  sort_heap(__first, __middle, __comp);
+}
+
+_STLP_MOVE_TO_STD_NAMESPACE
+
+template <class _RandomAccessIter>
+void partial_sort(_RandomAccessIter __first,_RandomAccessIter __middle,
+                  _RandomAccessIter __last) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __middle))
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__middle, __last))
+  _STLP_PRIV __partial_sort(__first, __middle, __last, _STLP_VALUE_TYPE(__first, _RandomAccessIter),
+                            _STLP_PRIV __less(_STLP_VALUE_TYPE(__first, _RandomAccessIter)));
+}
+
+template <class _RandomAccessIter, class _Compare>
+void partial_sort(_RandomAccessIter __first,_RandomAccessIter __middle,
+                  _RandomAccessIter __last, _Compare __comp) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __middle))
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__middle, __last))
+  _STLP_PRIV __partial_sort(__first, __middle, __last, _STLP_VALUE_TYPE(__first, _RandomAccessIter), __comp);
+}
+
+_STLP_MOVE_TO_PRIV_NAMESPACE
+
+template <class _InputIter, class _RandomAccessIter, class _Compare,
+          class _Distance, class _Tp>
+_RandomAccessIter __partial_sort_copy(_InputIter __first,
+                                      _InputIter __last,
+                                      _RandomAccessIter __result_first,
+                                      _RandomAccessIter __result_last,
+                                      _Compare __comp, _Distance*, _Tp*) {
+  if (__result_first == __result_last) return __result_last;
+  _RandomAccessIter __result_real_last = __result_first;
+  while(__first != __last && __result_real_last != __result_last) {
+    *__result_real_last = *__first;
+    ++__result_real_last;
+    ++__first;
+  }
+  make_heap(__result_first, __result_real_last, __comp);
+  while (__first != __last) {
+    if (__comp(*__first, *__result_first)) {
+      _STLP_VERBOSE_ASSERT(!__comp(*__result_first, *__first), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+      __adjust_heap(__result_first, _Distance(0),
+                    _Distance(__result_real_last - __result_first),
+                    _Tp(*__first),
+                    __comp);
+    }
+    ++__first;
+  }
+  sort_heap(__result_first, __result_real_last, __comp);
+  return __result_real_last;
+}
+
+_STLP_MOVE_TO_STD_NAMESPACE
+
+template <class _InputIter, class _RandomAccessIter>
+_RandomAccessIter
+partial_sort_copy(_InputIter __first, _InputIter __last,
+                  _RandomAccessIter __result_first, _RandomAccessIter __result_last) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __last))
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__result_first, __result_last))
+  return _STLP_PRIV __partial_sort_copy(__first, __last, __result_first, __result_last,
+                                        _STLP_PRIV __less(_STLP_VALUE_TYPE(__first, _InputIter)),
+                                        _STLP_DISTANCE_TYPE(__result_first, _RandomAccessIter),
+                                        _STLP_VALUE_TYPE(__first, _InputIter));
+}
+
+template <class _InputIter, class _RandomAccessIter, class _Compare>
+_RandomAccessIter
+partial_sort_copy(_InputIter __first, _InputIter __last,
+                  _RandomAccessIter __result_first,
+                  _RandomAccessIter __result_last, _Compare __comp) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __last))
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__result_first, __result_last))
+  return _STLP_PRIV __partial_sort_copy(__first, __last, __result_first, __result_last,
+                                        __comp,
+                                        _STLP_DISTANCE_TYPE(__result_first, _RandomAccessIter),
+                                        _STLP_VALUE_TYPE(__first, _InputIter));
+}
+
+// nth_element() and its auxiliary functions.
+_STLP_MOVE_TO_PRIV_NAMESPACE
+
+template <class _RandomAccessIter, class _Tp, class _Compare>
+void __nth_element(_RandomAccessIter __first, _RandomAccessIter __nth,
+                   _RandomAccessIter __last, _Tp*, _Compare __comp) {
+  while (__last - __first > 3) {
+    _RandomAccessIter __cut =
+      __unguarded_partition(__first, __last,
+                            _Tp(__median(*__first,
+                                         *(__first + (__last - __first)/2),
+                                         *(__last - 1),
+                                         __comp)),
+                            __comp);
+    if (__cut <= __nth)
+      __first = __cut;
+    else
+      __last = __cut;
+  }
+  __insertion_sort(__first, __last, _STLP_VALUE_TYPE(__first,_RandomAccessIter), __comp);
+}
+
+_STLP_MOVE_TO_STD_NAMESPACE
+
+template <class _RandomAccessIter>
+void nth_element(_RandomAccessIter __first, _RandomAccessIter __nth,
+                 _RandomAccessIter __last) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __nth))
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__nth, __last))
+  _STLP_PRIV __nth_element(__first, __nth, __last, _STLP_VALUE_TYPE(__first, _RandomAccessIter),
+                           _STLP_PRIV __less(_STLP_VALUE_TYPE(__first, _RandomAccessIter)));
+}
+
+template <class _RandomAccessIter, class _Compare>
+void nth_element(_RandomAccessIter __first, _RandomAccessIter __nth,
+                 _RandomAccessIter __last, _Compare __comp) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __nth))
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__nth, __last))
+  _STLP_PRIV __nth_element(__first, __nth, __last, _STLP_VALUE_TYPE(__first, _RandomAccessIter), __comp);
+}
+
+// Binary search (lower_bound, upper_bound, equal_range, binary_search).
+_STLP_MOVE_TO_PRIV_NAMESPACE
+
+template <class _ForwardIter, class _Tp,
+          class _Compare1, class _Compare2, class _Distance>
+_ForwardIter __upper_bound(_ForwardIter __first, _ForwardIter __last, const _Tp& __val,
+                           _Compare1 __comp1, _Compare2 __comp2, _Distance*) {
+  _Distance __len = distance(__first, __last);
+  _Distance __half;
+
+  while (__len > 0) {
+    __half = __len >> 1;
+    _ForwardIter __middle = __first;
+    advance(__middle, __half);
+    if (__comp2(__val, *__middle)) {
+      _STLP_VERBOSE_ASSERT(!__comp1(*__middle, __val), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+      __len = __half;
+    }
+    else {
+      __first = __middle;
+      ++__first;
+      __len = __len - __half - 1;
+    }
+  }
+  return __first;
+}
+
+template <class _ForwardIter, class _Tp,
+          class _Compare1, class _Compare2, class _Distance>
+pair<_ForwardIter, _ForwardIter>
+__equal_range(_ForwardIter __first, _ForwardIter __last, const _Tp& __val,
+              _Compare1 __comp1, _Compare2 __comp2, _Distance* __dist) {
+  _Distance __len = distance(__first, __last);
+  _Distance __half;
+
+  while (__len > 0) {
+    __half = __len >> 1;
+    _ForwardIter __middle = __first;
+    advance(__middle, __half);
+    if (__comp1(*__middle, __val)) {
+      _STLP_VERBOSE_ASSERT(!__comp2(__val, *__middle), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+      __first = __middle;
+      ++__first;
+      __len = __len - __half - 1;
+    }
+    else if (__comp2(__val, *__middle)) {
+      _STLP_VERBOSE_ASSERT(!__comp1(*__middle, __val), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+      __len = __half;
+    }
+    else {
+      _ForwardIter __left = __lower_bound(__first, __middle, __val, __comp1, __comp2, __dist);
+      //Small optim: If lower_bound haven't found an equivalent value
+      //there is no need to call upper_bound.
+      if (__comp1(*__left, __val)) {
+        _STLP_VERBOSE_ASSERT(!__comp2(__val, *__left), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+        return pair<_ForwardIter, _ForwardIter>(__left, __left);
+      }
+      advance(__first, __len);
+      _ForwardIter __right = __upper_bound(++__middle, __first, __val, __comp1, __comp2, __dist);
+      return pair<_ForwardIter, _ForwardIter>(__left, __right);
+    }
+  }
+  return pair<_ForwardIter, _ForwardIter>(__first, __first);
+}
+
+_STLP_MOVE_TO_STD_NAMESPACE
+
+template <class _InputIter1, class _InputIter2, class _OutputIter>
+_OutputIter merge(_InputIter1 __first1, _InputIter1 __last1,
+                  _InputIter2 __first2, _InputIter2 __last2,
+                  _OutputIter __result) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first1, __last1))
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first2, __last2))
+  while (__first1 != __last1 && __first2 != __last2) {
+    if (*__first2 < *__first1) {
+      *__result = *__first2;
+      ++__first2;
+    }
+    else {
+      *__result = *__first1;
+      ++__first1;
+    }
+    ++__result;
+  }
+  return copy(__first2, __last2, copy(__first1, __last1, __result));
+}
+
+template <class _InputIter1, class _InputIter2, class _OutputIter,
+          class _Compare>
+_OutputIter merge(_InputIter1 __first1, _InputIter1 __last1,
+                  _InputIter2 __first2, _InputIter2 __last2,
+                  _OutputIter __result, _Compare __comp) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first1, __last1))
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first2, __last2))
+  while (__first1 != __last1 && __first2 != __last2) {
+    if (__comp(*__first2, *__first1)) {
+      _STLP_VERBOSE_ASSERT(!__comp(*__first1, *__first2), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+      *__result = *__first2;
+      ++__first2;
+    }
+    else {
+      *__result = *__first1;
+      ++__first1;
+    }
+    ++__result;
+  }
+  return copy(__first2, __last2, copy(__first1, __last1, __result));
+}
+
+_STLP_MOVE_TO_PRIV_NAMESPACE
+
+template <class _BidirectionalIter, class _Distance, class _Compare>
+void __merge_without_buffer(_BidirectionalIter __first,
+                            _BidirectionalIter __middle,
+                            _BidirectionalIter __last,
+                            _Distance __len1, _Distance __len2,
+                            _Compare __comp) {
+  if (__len1 == 0 || __len2 == 0)
+    return;
+  if (__len1 + __len2 == 2) {
+    if (__comp(*__middle, *__first)) {
+      _STLP_VERBOSE_ASSERT(!__comp(*__first, *__middle), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+      iter_swap(__first, __middle);
+    }
+    return;
+  }
+  _BidirectionalIter __first_cut = __first;
+  _BidirectionalIter __second_cut = __middle;
+  _Distance __len11 = 0;
+  _Distance __len22 = 0;
+  if (__len1 > __len2) {
+    __len11 = __len1 / 2;
+    advance(__first_cut, __len11);
+    __second_cut = lower_bound(__middle, __last, *__first_cut, __comp);
+    __len22 += distance(__middle, __second_cut);
+  }
+  else {
+    __len22 = __len2 / 2;
+    advance(__second_cut, __len22);
+    __first_cut = upper_bound(__first, __middle, *__second_cut, __comp);
+    __len11 +=distance(__first, __first_cut);
+  }
+  _BidirectionalIter __new_middle
+    = __rotate(__first_cut, __middle, __second_cut);
+  __merge_without_buffer(__first, __first_cut, __new_middle, __len11, __len22,
+                         __comp);
+  __merge_without_buffer(__new_middle, __second_cut, __last, __len1 - __len11,
+                         __len2 - __len22, __comp);
+}
+
+template <class _BidirectionalIter1, class _BidirectionalIter2,
+          class _BidirectionalIter3, class _Compare>
+_BidirectionalIter3 __merge_backward(_BidirectionalIter1 __first1,
+                                     _BidirectionalIter1 __last1,
+                                     _BidirectionalIter2 __first2,
+                                     _BidirectionalIter2 __last2,
+                                     _BidirectionalIter3 __result,
+                                     _Compare __comp) {
+  if (__first1 == __last1)
+    return copy_backward(__first2, __last2, __result);
+  if (__first2 == __last2)
+    return copy_backward(__first1, __last1, __result);
+  --__last1;
+  --__last2;
+  for (;;) {
+    if (__comp(*__last2, *__last1)) {
+      _STLP_VERBOSE_ASSERT(!__comp(*__last1, *__last2), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+      *--__result = *__last1;
+      if (__first1 == __last1)
+        return copy_backward(__first2, ++__last2, __result);
+      --__last1;
+    }
+    else {
+      *--__result = *__last2;
+      if (__first2 == __last2)
+        return copy_backward(__first1, ++__last1, __result);
+      --__last2;
+    }
+  }
+}
+
+template <class _BidirectionalIter, class _Tp,
+          class _Distance, class _Compare>
+inline void __inplace_merge_aux(_BidirectionalIter __first,
+                                _BidirectionalIter __middle,
+                                _BidirectionalIter __last, _Tp*, _Distance*,
+                                _Compare __comp) {
+  _Distance __len1 = distance(__first, __middle);
+  _Distance __len2 = distance(__middle, __last);
+
+  _Temporary_buffer<_BidirectionalIter, _Tp> __buf(__first, __last);
+  if (__buf.begin() == 0)
+    __merge_without_buffer(__first, __middle, __last, __len1, __len2, __comp);
+  else
+    __merge_adaptive(__first, __middle, __last, __len1, __len2,
+                     __buf.begin(), _Distance(__buf.size()),
+                     __comp);
+}
+
+_STLP_MOVE_TO_STD_NAMESPACE
+
+template <class _BidirectionalIter>
+void inplace_merge(_BidirectionalIter __first,
+                   _BidirectionalIter __middle,
+                   _BidirectionalIter __last) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __middle))
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__middle, __last))
+  if (__first == __middle || __middle == __last)
+    return;
+  _STLP_PRIV __inplace_merge_aux(__first, __middle, __last,
+                                 _STLP_VALUE_TYPE(__first, _BidirectionalIter), _STLP_DISTANCE_TYPE(__first, _BidirectionalIter),
+                                 _STLP_PRIV __less(_STLP_VALUE_TYPE(__first, _BidirectionalIter)));
+}
+
+template <class _BidirectionalIter, class _Compare>
+void inplace_merge(_BidirectionalIter __first,
+                   _BidirectionalIter __middle,
+                   _BidirectionalIter __last, _Compare __comp) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __middle))
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__middle, __last))
+  if (__first == __middle || __middle == __last)
+    return;
+  _STLP_PRIV __inplace_merge_aux(__first, __middle, __last,
+                                 _STLP_VALUE_TYPE(__first, _BidirectionalIter), _STLP_DISTANCE_TYPE(__first, _BidirectionalIter),
+                                 __comp);
+}
+
+_STLP_MOVE_TO_PRIV_NAMESPACE
+
+template <class _InputIter1, class _InputIter2, class _Compare>
+bool __includes(_InputIter1 __first1, _InputIter1 __last1,
+                _InputIter2 __first2, _InputIter2 __last2, _Compare __comp) {
+  _STLP_DEBUG_CHECK(__check_range(__first1, __last1))
+  _STLP_DEBUG_CHECK(__check_range(__first2, __last2))
+  while (__first1 != __last1 && __first2 != __last2)
+    if (__comp(*__first2, *__first1)) {
+      _STLP_VERBOSE_ASSERT(!__comp(*__first1, *__first2), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+      return false;
+    }
+    else if (__comp(*__first1, *__first2))
+      ++__first1;
+    else
+      ++__first1, ++__first2;
+
+  return __first2 == __last2;
+}
+
+_STLP_MOVE_TO_STD_NAMESPACE
+
+template <class _InputIter1, class _InputIter2, class _Compare>
+bool includes(_InputIter1 __first1, _InputIter1 __last1,
+              _InputIter2 __first2, _InputIter2 __last2, _Compare __comp) {
+  return _STLP_PRIV __includes(__first1, __last1, __first2, __last2, __comp);
+}
+
+template <class _InputIter1, class _InputIter2>
+bool includes(_InputIter1 __first1, _InputIter1 __last1,
+              _InputIter2 __first2, _InputIter2 __last2) {
+  return _STLP_PRIV __includes(__first1, __last1, __first2, __last2,
+                               _STLP_PRIV __less(_STLP_VALUE_TYPE(__first1, _InputIter1)));
+}
+
+_STLP_MOVE_TO_PRIV_NAMESPACE
+
+template <class _InputIter1, class _InputIter2, class _OutputIter,
+          class _Compare>
+_OutputIter __set_union(_InputIter1 __first1, _InputIter1 __last1,
+                        _InputIter2 __first2, _InputIter2 __last2,
+                        _OutputIter __result, _Compare __comp) {
+  _STLP_DEBUG_CHECK(__check_range(__first1, __last1))
+  _STLP_DEBUG_CHECK(__check_range(__first2, __last2))
+  while (__first1 != __last1 && __first2 != __last2) {
+    if (__comp(*__first1, *__first2)) {
+      _STLP_VERBOSE_ASSERT(!__comp(*__first2, *__first1), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+      *__result = *__first1;
+      ++__first1;
+    }
+    else if (__comp(*__first2, *__first1)) {
+      _STLP_VERBOSE_ASSERT(!__comp(*__first1, *__first2), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+      *__result = *__first2;
+      ++__first2;
+    }
+    else {
+      *__result = *__first1;
+      ++__first1;
+      ++__first2;
+    }
+    ++__result;
+  }
+  return copy(__first2, __last2, copy(__first1, __last1, __result));
+}
+
+_STLP_MOVE_TO_STD_NAMESPACE
+
+template <class _InputIter1, class _InputIter2, class _OutputIter>
+_OutputIter set_union(_InputIter1 __first1, _InputIter1 __last1,
+                      _InputIter2 __first2, _InputIter2 __last2,
+                      _OutputIter __result) {
+  return _STLP_PRIV __set_union(__first1, __last1, __first2, __last2, __result,
+                                _STLP_PRIV __less(_STLP_VALUE_TYPE(__first1, _InputIter1)));
+}
+
+template <class _InputIter1, class _InputIter2, class _OutputIter,
+          class _Compare>
+_OutputIter set_union(_InputIter1 __first1, _InputIter1 __last1,
+                      _InputIter2 __first2, _InputIter2 __last2,
+                      _OutputIter __result, _Compare __comp) {
+  return _STLP_PRIV __set_union(__first1, __last1, __first2, __last2, __result, __comp);
+}
+
+_STLP_MOVE_TO_PRIV_NAMESPACE
+
+template <class _InputIter1, class _InputIter2, class _OutputIter,
+          class _Compare>
+_OutputIter __set_intersection(_InputIter1 __first1, _InputIter1 __last1,
+                               _InputIter2 __first2, _InputIter2 __last2,
+                               _OutputIter __result, _Compare __comp) {
+  _STLP_DEBUG_CHECK(__check_range(__first1, __last1))
+  _STLP_DEBUG_CHECK(__check_range(__first2, __last2))
+  while (__first1 != __last1 && __first2 != __last2)
+    if (__comp(*__first1, *__first2)) {
+      _STLP_VERBOSE_ASSERT(!__comp(*__first2, *__first1), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+      ++__first1;
+    }
+    else if (__comp(*__first2, *__first1))
+      ++__first2;
+    else {
+      *__result = *__first1;
+      ++__first1;
+      ++__first2;
+      ++__result;
+    }
+  return __result;
+}
+
+_STLP_MOVE_TO_STD_NAMESPACE
+
+template <class _InputIter1, class _InputIter2, class _OutputIter>
+_OutputIter set_intersection(_InputIter1 __first1, _InputIter1 __last1,
+                             _InputIter2 __first2, _InputIter2 __last2,
+                             _OutputIter __result) {
+  return _STLP_PRIV __set_intersection(__first1, __last1, __first2, __last2, __result,
+                                       _STLP_PRIV __less(_STLP_VALUE_TYPE(__first1, _InputIter1)));
+}
+
+template <class _InputIter1, class _InputIter2, class _OutputIter,
+          class _Compare>
+_OutputIter set_intersection(_InputIter1 __first1, _InputIter1 __last1,
+                             _InputIter2 __first2, _InputIter2 __last2,
+                             _OutputIter __result, _Compare __comp) {
+  return _STLP_PRIV __set_intersection(__first1, __last1, __first2, __last2, __result, __comp);
+}
+
+_STLP_MOVE_TO_PRIV_NAMESPACE
+
+template <class _InputIter1, class _InputIter2, class _OutputIter,
+          class _Compare>
+_OutputIter __set_difference(_InputIter1 __first1, _InputIter1 __last1,
+                             _InputIter2 __first2, _InputIter2 __last2,
+                             _OutputIter __result, _Compare __comp) {
+  _STLP_DEBUG_CHECK(__check_range(__first1, __last1))
+  _STLP_DEBUG_CHECK(__check_range(__first2, __last2))
+  while (__first1 != __last1 && __first2 != __last2)
+    if (__comp(*__first1, *__first2)) {
+      _STLP_VERBOSE_ASSERT(!__comp(*__first2, *__first1), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+      *__result = *__first1;
+      ++__first1;
+      ++__result;
+    }
+    else if (__comp(*__first2, *__first1))
+      ++__first2;
+    else {
+      ++__first1;
+      ++__first2;
+    }
+  return copy(__first1, __last1, __result);
+}
+
+_STLP_MOVE_TO_STD_NAMESPACE
+
+template <class _InputIter1, class _InputIter2, class _OutputIter>
+_OutputIter set_difference(_InputIter1 __first1, _InputIter1 __last1,
+                           _InputIter2 __first2, _InputIter2 __last2,
+                           _OutputIter __result) {
+  return _STLP_PRIV __set_difference(__first1, __last1, __first2, __last2, __result,
+                                     _STLP_PRIV __less(_STLP_VALUE_TYPE(__first1, _InputIter1)));
+}
+
+template <class _InputIter1, class _InputIter2, class _OutputIter,
+          class _Compare>
+_OutputIter set_difference(_InputIter1 __first1, _InputIter1 __last1,
+                           _InputIter2 __first2, _InputIter2 __last2,
+                           _OutputIter __result, _Compare __comp) {
+  return _STLP_PRIV __set_difference(__first1, __last1, __first2, __last2, __result, __comp);
+}
+
+_STLP_MOVE_TO_PRIV_NAMESPACE
+
+template <class _InputIter1, class _InputIter2, class _OutputIter, class _Compare>
+_OutputIter
+__set_symmetric_difference(_InputIter1 __first1, _InputIter1 __last1,
+                           _InputIter2 __first2, _InputIter2 __last2,
+                           _OutputIter __result, _Compare __comp) {
+  _STLP_DEBUG_CHECK(__check_range(__first1, __last1))
+  _STLP_DEBUG_CHECK(__check_range(__first2, __last2))
+  while (__first1 != __last1 && __first2 != __last2) {
+    if (__comp(*__first1, *__first2)) {
+      _STLP_VERBOSE_ASSERT(!__comp(*__first2, *__first1), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+      *__result = *__first1;
+      ++__first1;
+      ++__result;
+    }
+    else if (__comp(*__first2, *__first1)) {
+      *__result = *__first2;
+      ++__first2;
+      ++__result;
+    }
+    else {
+      ++__first1;
+      ++__first2;
+    }
+  }
+  return copy(__first2, __last2, copy(__first1, __last1, __result));
+}
+
+_STLP_MOVE_TO_STD_NAMESPACE
+
+template <class _InputIter1, class _InputIter2, class _OutputIter>
+_OutputIter
+set_symmetric_difference(_InputIter1 __first1, _InputIter1 __last1,
+                         _InputIter2 __first2, _InputIter2 __last2,
+                         _OutputIter __result) {
+  return _STLP_PRIV __set_symmetric_difference(__first1, __last1, __first2, __last2, __result,
+                                               _STLP_PRIV __less(_STLP_VALUE_TYPE(__first1, _InputIter1)));
+}
+
+template <class _InputIter1, class _InputIter2, class _OutputIter, class _Compare>
+_OutputIter
+set_symmetric_difference(_InputIter1 __first1, _InputIter1 __last1,
+                         _InputIter2 __first2, _InputIter2 __last2,
+                         _OutputIter __result,
+                         _Compare __comp) {
+  return _STLP_PRIV __set_symmetric_difference(__first1, __last1, __first2, __last2, __result, __comp);
+}
+
+// min_element and max_element, with and without an explicitly supplied
+// comparison function.
+
+template <class _ForwardIter>
+_ForwardIter max_element(_ForwardIter __first, _ForwardIter __last) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __last))
+  if (__first == __last) return __first;
+  _ForwardIter __result = __first;
+  while (++__first != __last)
+    if (*__result < *__first)
+      __result = __first;
+  return __result;
+}
+
+template <class _ForwardIter, class _Compare>
+_ForwardIter max_element(_ForwardIter __first, _ForwardIter __last,
+                         _Compare __comp) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __last))
+  if (__first == __last) return __first;
+  _ForwardIter __result = __first;
+  while (++__first != __last) {
+    if (__comp(*__result, *__first)) {
+      _STLP_VERBOSE_ASSERT(!__comp(*__first, *__result), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+      __result = __first;
+    }
+  }
+  return __result;
+}
+
+template <class _ForwardIter>
+_ForwardIter min_element(_ForwardIter __first, _ForwardIter __last) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __last))
+  if (__first == __last) return __first;
+  _ForwardIter __result = __first;
+  while (++__first != __last)
+    if (*__first < *__result)
+      __result = __first;
+  return __result;
+}
+
+template <class _ForwardIter, class _Compare>
+_ForwardIter min_element(_ForwardIter __first, _ForwardIter __last,
+                         _Compare __comp) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __last))
+  if (__first == __last) return __first;
+  _ForwardIter __result = __first;
+  while (++__first != __last) {
+    if (__comp(*__first, *__result)) {
+      _STLP_VERBOSE_ASSERT(!__comp(*__result, *__first), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+      __result = __first;
+    }
+  }
+  return __result;
+}
+
+// next_permutation and prev_permutation, with and without an explicitly
+// supplied comparison function.
+_STLP_MOVE_TO_PRIV_NAMESPACE
+
+template <class _BidirectionalIter, class _Compare>
+bool __next_permutation(_BidirectionalIter __first, _BidirectionalIter __last,
+                        _Compare __comp) {
+  _STLP_DEBUG_CHECK(__check_range(__first, __last))
+  if (__first == __last)
+    return false;
+  _BidirectionalIter __i = __first;
+  ++__i;
+  if (__i == __last)
+    return false;
+  __i = __last;
+  --__i;
+
+  for(;;) {
+    _BidirectionalIter __ii = __i;
+    --__i;
+    if (__comp(*__i, *__ii)) {
+      _STLP_VERBOSE_ASSERT(!__comp(*__ii, *__i), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+      _BidirectionalIter __j = __last;
+      while (!__comp(*__i, *--__j)) {}
+      iter_swap(__i, __j);
+      reverse(__ii, __last);
+      return true;
+    }
+    if (__i == __first) {
+      reverse(__first, __last);
+      return false;
+    }
+  }
+#if defined (_STLP_NEED_UNREACHABLE_RETURN)
+    return false;
+#endif
+}
+
+_STLP_MOVE_TO_STD_NAMESPACE
+
+template <class _BidirectionalIter>
+bool next_permutation(_BidirectionalIter __first, _BidirectionalIter __last) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __last))
+  return _STLP_PRIV __next_permutation(__first, __last,
+                                       _STLP_PRIV __less(_STLP_VALUE_TYPE(__first, _BidirectionalIter)));
+}
+
+template <class _BidirectionalIter, class _Compare>
+bool next_permutation(_BidirectionalIter __first, _BidirectionalIter __last,
+                      _Compare __comp) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __last))
+  return _STLP_PRIV __next_permutation(__first, __last, __comp);
+}
+
+_STLP_MOVE_TO_PRIV_NAMESPACE
+
+template <class _BidirectionalIter, class _Compare>
+bool __prev_permutation(_BidirectionalIter __first, _BidirectionalIter __last,
+                        _Compare __comp) {
+  if (__first == __last)
+    return false;
+  _BidirectionalIter __i = __first;
+  ++__i;
+  if (__i == __last)
+    return false;
+  __i = __last;
+  --__i;
+
+  for(;;) {
+    _BidirectionalIter __ii = __i;
+    --__i;
+    if (__comp(*__ii, *__i)) {
+      _STLP_VERBOSE_ASSERT(!__comp(*__i, *__ii), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+      _BidirectionalIter __j = __last;
+      while (!__comp(*--__j, *__i)) {}
+      iter_swap(__i, __j);
+      reverse(__ii, __last);
+      return true;
+    }
+    if (__i == __first) {
+      reverse(__first, __last);
+      return false;
+    }
+  }
+#if defined (_STLP_NEED_UNREACHABLE_RETURN)
+    return false;
+#endif
+}
+
+_STLP_MOVE_TO_STD_NAMESPACE
+
+template <class _BidirectionalIter>
+bool prev_permutation(_BidirectionalIter __first, _BidirectionalIter __last) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __last))
+  return _STLP_PRIV __prev_permutation(__first, __last,
+                                       _STLP_PRIV __less(_STLP_VALUE_TYPE(__first, _BidirectionalIter)));
+}
+
+template <class _BidirectionalIter, class _Compare>
+bool prev_permutation(_BidirectionalIter __first, _BidirectionalIter __last,
+                      _Compare __comp) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __last))
+  return _STLP_PRIV __prev_permutation(__first, __last, __comp);
+}
+
+#if !defined (_STLP_NO_EXTENSIONS)
+
+// is_heap, a predicate testing whether or not a range is
+// a heap.  This function is an extension, not part of the C++
+// standard.
+_STLP_MOVE_TO_PRIV_NAMESPACE
+
+template <class _RandomAccessIter, class _Distance, class _StrictWeakOrdering>
+bool __is_heap(_RandomAccessIter __first, _StrictWeakOrdering __comp,
+               _Distance __n) {
+  _Distance __parent = 0;
+  for (_Distance __child = 1; __child < __n; ++__child) {
+    if (__comp(__first[__parent], __first[__child])) {
+      _STLP_VERBOSE_ASSERT(!__comp(__first[__child], __first[__parent]), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+      return false;
+    }
+    if ((__child & 1) == 0)
+      ++__parent;
+  }
+  return true;
+}
+
+_STLP_MOVE_TO_STD_NAMESPACE
+
+template <class _RandomAccessIter>
+bool is_heap(_RandomAccessIter __first, _RandomAccessIter __last) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __last))
+  return _STLP_PRIV __is_heap(__first, _STLP_PRIV __less(_STLP_VALUE_TYPE(__first, _RandomAccessIter)), __last - __first);
+}
+
+template <class _RandomAccessIter, class _StrictWeakOrdering>
+bool is_heap(_RandomAccessIter __first, _RandomAccessIter __last,
+             _StrictWeakOrdering __comp) {
+  _STLP_DEBUG_CHECK(_STLP_PRIV __check_range(__first, __last))
+  return _STLP_PRIV __is_heap(__first, __comp, __last - __first);
+}
+
+
+_STLP_MOVE_TO_PRIV_NAMESPACE
+
+template <class _ForwardIter, class _StrictWeakOrdering>
+bool __is_sorted(_ForwardIter __first, _ForwardIter __last,
+                 _StrictWeakOrdering __comp) {
+  _STLP_DEBUG_CHECK(__check_range(__first, __last))
+  if (__first == __last)
+    return true;
+
+  _ForwardIter __next = __first;
+  for (++__next; __next != __last; __first = __next, ++__next) {
+    if (__comp(*__next, *__first)) {
+      _STLP_VERBOSE_ASSERT(!__comp(*__first, *__next), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+      return false;
+    }
+  }
+
+  return true;
+}
+
+_STLP_MOVE_TO_STD_NAMESPACE
+#endif /* _STLP_NO_EXTENSIONS */
+
+_STLP_END_NAMESPACE
+
+#undef __stl_threshold
+
+#endif /* _STLP_ALGO_C */
+// Local Variables:
+// mode:C++
+// End: