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extern/STLport/5.2.1/stlport/stl/_heap.c

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+/*
+ *
+ *
+ * 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_HEAP_C
+#define _STLP_HEAP_C
+
+#ifndef _STLP_INTERNAL_HEAP_H
+# include <stl/_heap.h>
+#endif
+
+#ifndef _STLP_INTERNAL_ITERATOR_BASE_H
+# include <stl/_iterator_base.h>
+#endif
+
+_STLP_BEGIN_NAMESPACE
+
+template <class _RandomAccessIterator, class _Distance, class _Tp>
+_STLP_INLINE_LOOP
+void
+__push_heap(_RandomAccessIterator __first,
+            _Distance __holeIndex, _Distance __topIndex, _Tp __val)
+{
+  _Distance __parent = (__holeIndex - 1) / 2;
+  while (__holeIndex > __topIndex && *(__first + __parent) < __val) {
+    *(__first + __holeIndex) = *(__first + __parent);
+    __holeIndex = __parent;
+    __parent = (__holeIndex - 1) / 2;
+  }
+  *(__first + __holeIndex) = __val;
+}
+
+template <class _RandomAccessIterator, class _Distance, class _Tp>
+inline void
+__push_heap_aux(_RandomAccessIterator __first,
+                _RandomAccessIterator __last, _Distance*, _Tp*)
+{
+  __push_heap(__first, _Distance((__last - __first) - 1), _Distance(0),
+              _Tp(*(__last - 1)));
+}
+
+template <class _RandomAccessIterator>
+void
+push_heap(_RandomAccessIterator __first, _RandomAccessIterator __last)
+{
+  __push_heap_aux(__first, __last,
+                  _STLP_DISTANCE_TYPE(__first, _RandomAccessIterator), _STLP_VALUE_TYPE(__first, _RandomAccessIterator));
+}
+
+
+template <class _RandomAccessIterator, class _Distance, class _Tp,
+          class _Compare>
+_STLP_INLINE_LOOP
+void
+__push_heap(_RandomAccessIterator __first, _Distance __holeIndex,
+            _Distance __topIndex, _Tp __val, _Compare __comp)
+{
+  _Distance __parent = (__holeIndex - 1) / 2;
+  while (__holeIndex > __topIndex && __comp(*(__first + __parent), __val)) {
+    _STLP_VERBOSE_ASSERT(!__comp(__val, *(__first + __parent)), _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+    *(__first + __holeIndex) = *(__first + __parent);
+    __holeIndex = __parent;
+    __parent = (__holeIndex - 1) / 2;
+  }
+  *(__first + __holeIndex) = __val;
+}
+
+template <class _RandomAccessIterator, class _Compare,
+          class _Distance, class _Tp>
+inline void
+__push_heap_aux(_RandomAccessIterator __first,
+                _RandomAccessIterator __last, _Compare __comp,
+                _Distance*, _Tp*)
+{
+  __push_heap(__first, _Distance((__last - __first) - 1), _Distance(0),
+              _Tp(*(__last - 1)), __comp);
+}
+
+template <class _RandomAccessIterator, class _Compare>
+void
+push_heap(_RandomAccessIterator __first, _RandomAccessIterator __last,
+          _Compare __comp)
+{
+  __push_heap_aux(__first, __last, __comp,
+                  _STLP_DISTANCE_TYPE(__first, _RandomAccessIterator), _STLP_VALUE_TYPE(__first, _RandomAccessIterator));
+}
+
+template <class _RandomAccessIterator, class _Distance, class _Tp>
+void
+__adjust_heap(_RandomAccessIterator __first, _Distance __holeIndex,
+              _Distance __len, _Tp __val) {
+  _Distance __topIndex = __holeIndex;
+  _Distance __secondChild = 2 * __holeIndex + 2;
+  while (__secondChild < __len) {
+    if (*(__first + __secondChild) < *(__first + (__secondChild - 1)))
+      __secondChild--;
+    *(__first + __holeIndex) = *(__first + __secondChild);
+    __holeIndex = __secondChild;
+    __secondChild = 2 * (__secondChild + 1);
+  }
+  if (__secondChild == __len) {
+    *(__first + __holeIndex) = *(__first + (__secondChild - 1));
+    __holeIndex = __secondChild - 1;
+  }
+  __push_heap(__first, __holeIndex, __topIndex, __val);
+}
+
+
+template <class _RandomAccessIterator, class _Tp>
+inline void
+__pop_heap_aux(_RandomAccessIterator __first, _RandomAccessIterator __last, _Tp*) {
+  __pop_heap(__first, __last - 1, __last - 1,
+             _Tp(*(__last - 1)), _STLP_DISTANCE_TYPE(__first, _RandomAccessIterator));
+}
+
+template <class _RandomAccessIterator>
+void pop_heap(_RandomAccessIterator __first,
+        _RandomAccessIterator __last) {
+  __pop_heap_aux(__first, __last, _STLP_VALUE_TYPE(__first, _RandomAccessIterator));
+}
+
+template <class _RandomAccessIterator, class _Distance,
+          class _Tp, class _Compare>
+void
+__adjust_heap(_RandomAccessIterator __first, _Distance __holeIndex,
+              _Distance __len, _Tp __val, _Compare __comp)
+{
+  _Distance __topIndex = __holeIndex;
+  _Distance __secondChild = 2 * __holeIndex + 2;
+  while (__secondChild < __len) {
+    if (__comp(*(__first + __secondChild), *(__first + (__secondChild - 1)))) {
+      _STLP_VERBOSE_ASSERT(!__comp(*(__first + (__secondChild - 1)), *(__first + __secondChild)),
+                           _StlMsg_INVALID_STRICT_WEAK_PREDICATE)
+      __secondChild--;
+    }
+    *(__first + __holeIndex) = *(__first + __secondChild);
+    __holeIndex = __secondChild;
+    __secondChild = 2 * (__secondChild + 1);
+  }
+  if (__secondChild == __len) {
+    *(__first + __holeIndex) = *(__first + (__secondChild - 1));
+    __holeIndex = __secondChild - 1;
+  }
+  __push_heap(__first, __holeIndex, __topIndex, __val, __comp);
+}
+
+
+template <class _RandomAccessIterator, class _Tp, class _Compare>
+inline void
+__pop_heap_aux(_RandomAccessIterator __first,
+               _RandomAccessIterator __last, _Tp*, _Compare __comp)
+{
+  __pop_heap(__first, __last - 1, __last - 1, _Tp(*(__last - 1)), __comp,
+             _STLP_DISTANCE_TYPE(__first, _RandomAccessIterator));
+}
+
+
+template <class _RandomAccessIterator, class _Compare>
+void
+pop_heap(_RandomAccessIterator __first,
+         _RandomAccessIterator __last, _Compare __comp)
+{
+    __pop_heap_aux(__first, __last, _STLP_VALUE_TYPE(__first, _RandomAccessIterator), __comp);
+}
+
+template <class _RandomAccessIterator, class _Tp, class _Distance>
+_STLP_INLINE_LOOP
+void
+__make_heap(_RandomAccessIterator __first,
+            _RandomAccessIterator __last, _Tp*, _Distance*)
+{
+  if (__last - __first < 2) return;
+  _Distance __len = __last - __first;
+  _Distance __parent = (__len - 2)/2;
+
+  for (;;) {
+    __adjust_heap(__first, __parent, __len, _Tp(*(__first + __parent)));
+    if (__parent == 0) return;
+    __parent--;
+  }
+}
+
+template <class _RandomAccessIterator>
+void
+make_heap(_RandomAccessIterator __first, _RandomAccessIterator __last)
+{
+  __make_heap(__first, __last,
+              _STLP_VALUE_TYPE(__first, _RandomAccessIterator), _STLP_DISTANCE_TYPE(__first, _RandomAccessIterator));
+}
+
+template <class _RandomAccessIterator, class _Compare,
+          class _Tp, class _Distance>
+_STLP_INLINE_LOOP
+void
+__make_heap(_RandomAccessIterator __first, _RandomAccessIterator __last,
+            _Compare __comp, _Tp*, _Distance*)
+{
+  if (__last - __first < 2) return;
+  _Distance __len = __last - __first;
+  _Distance __parent = (__len - 2)/2;
+
+  for (;;) {
+    __adjust_heap(__first, __parent, __len, _Tp(*(__first + __parent)),
+                  __comp);
+    if (__parent == 0) return;
+    __parent--;
+  }
+}
+
+template <class _RandomAccessIterator, class _Compare>
+void
+make_heap(_RandomAccessIterator __first,
+          _RandomAccessIterator __last, _Compare __comp)
+{
+  __make_heap(__first, __last, __comp,
+              _STLP_VALUE_TYPE(__first, _RandomAccessIterator), _STLP_DISTANCE_TYPE(__first, _RandomAccessIterator));
+}
+
+_STLP_END_NAMESPACE
+
+#endif /*  _STLP_HEAP_C */
+
+// Local Variables:
+// mode:C++
+// End: