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authorpeter <peter@FreeBSD.org>2008-06-01 00:03:21 +0000
committerpeter <peter@FreeBSD.org>2008-06-01 00:03:21 +0000
commita2be5f0c15218b0177d73b17d9bcb7589965d685 (patch)
treec9f0cd9c22378356a1716d32e13e70bc90f98b9c /libg++/libstdc++/stl/heap.h
parent9e0f3cc19c9df1594c9cc36cfd8fddc83c52ad12 (diff)
downloadFreeBSD-src-a2be5f0c15218b0177d73b17d9bcb7589965d685.zip
FreeBSD-src-a2be5f0c15218b0177d73b17d9bcb7589965d685.tar.gz
Reorganize the gcc vendor import work area. This flattens out a bunch
of unnecessary path components that are relics of cvs2svn. (These are directory moves)
Diffstat (limited to 'libg++/libstdc++/stl/heap.h')
-rw-r--r--libg++/libstdc++/stl/heap.h193
1 files changed, 193 insertions, 0 deletions
diff --git a/libg++/libstdc++/stl/heap.h b/libg++/libstdc++/stl/heap.h
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+++ b/libg++/libstdc++/stl/heap.h
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+/*
+ *
+ * Copyright (c) 1994
+ * Hewlett-Packard Company
+ *
+ * Permission to use, copy, modify, distribute and sell this software
+ * and its documentation for any purpose is hereby granted without fee,
+ * provided that the above copyright notice appear in all copies and
+ * that both that copyright notice and this permission notice appear
+ * in supporting documentation. Hewlett-Packard Company makes no
+ * representations about the suitability of this software for any
+ * purpose. It is provided "as is" without express or implied warranty.
+ *
+ */
+
+#ifndef HEAP_H
+#define HEAP_H
+
+template <class RandomAccessIterator, class Distance, class T>
+void __push_heap(RandomAccessIterator first, Distance holeIndex,
+ Distance topIndex, T value) {
+ Distance parent = (holeIndex - 1) / 2;
+ while (holeIndex > topIndex && *(first + parent) < value) {
+ *(first + holeIndex) = *(first + parent);
+ holeIndex = parent;
+ parent = (holeIndex - 1) / 2;
+ }
+ *(first + holeIndex) = value;
+}
+
+template <class RandomAccessIterator, class T>
+inline void __push_heap_aux(RandomAccessIterator first,
+ RandomAccessIterator last, T*) {
+ __push_heap(first, (last - first) - 1, 0, T(*(last - 1)));
+}
+
+template <class RandomAccessIterator>
+inline void push_heap(RandomAccessIterator first, RandomAccessIterator last) {
+ __push_heap_aux(first, last, value_type(first));
+}
+
+template <class RandomAccessIterator, class Distance, class T, class Compare>
+void __push_heap(RandomAccessIterator first, Distance holeIndex,
+ Distance topIndex, T value, Compare comp) {
+ Distance parent = (holeIndex - 1) / 2;
+ while (holeIndex > topIndex && comp(*(first + parent), value)) {
+ *(first + holeIndex) = *(first + parent);
+ holeIndex = parent;
+ parent = (holeIndex - 1) / 2;
+ }
+ *(first + holeIndex) = value;
+}
+
+template <class RandomAccessIterator, class Compare, class T>
+inline void __push_heap_aux(RandomAccessIterator first,
+ RandomAccessIterator last, Compare comp, T*) {
+ __push_heap(first, (last - first) - 1, 0, T(*(last - 1)), comp);
+}
+
+template <class RandomAccessIterator, class Compare>
+inline void push_heap(RandomAccessIterator first, RandomAccessIterator last,
+ Compare comp) {
+ __push_heap_aux(first, last, comp, value_type(first));
+}
+
+template <class RandomAccessIterator, class Distance, class T>
+void __adjust_heap(RandomAccessIterator first, Distance holeIndex,
+ Distance len, T value) {
+ 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, value);
+}
+
+template <class RandomAccessIterator, class T, class Distance>
+inline void __pop_heap(RandomAccessIterator first, RandomAccessIterator last,
+ RandomAccessIterator result, T value, Distance*) {
+ *result = *first;
+ __adjust_heap(first, Distance(0), Distance(last - first), value);
+}
+
+template <class RandomAccessIterator, class T>
+inline void __pop_heap_aux(RandomAccessIterator first,
+ RandomAccessIterator last, T*) {
+ __pop_heap(first, last - 1, last - 1, T(*(last - 1)), distance_type(first));
+}
+
+template <class RandomAccessIterator>
+inline void pop_heap(RandomAccessIterator first, RandomAccessIterator last) {
+ __pop_heap_aux(first, last, value_type(first));
+}
+
+template <class RandomAccessIterator, class Distance, class T, class Compare>
+void __adjust_heap(RandomAccessIterator first, Distance holeIndex,
+ Distance len, T value, Compare comp) {
+ Distance topIndex = holeIndex;
+ Distance secondChild = 2 * holeIndex + 2;
+ while (secondChild < len) {
+ if (comp(*(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, value, comp);
+}
+
+template <class RandomAccessIterator, class T, class Compare, class Distance>
+inline void __pop_heap(RandomAccessIterator first, RandomAccessIterator last,
+ RandomAccessIterator result, T value, Compare comp,
+ Distance*) {
+ *result = *first;
+ __adjust_heap(first, Distance(0), Distance(last - first), value, comp);
+}
+
+template <class RandomAccessIterator, class T, class Compare>
+inline void __pop_heap_aux(RandomAccessIterator first,
+ RandomAccessIterator last, T*, Compare comp) {
+ __pop_heap(first, last - 1, last - 1, T(*(last - 1)), comp,
+ distance_type(first));
+}
+
+template <class RandomAccessIterator, class Compare>
+inline void pop_heap(RandomAccessIterator first, RandomAccessIterator last,
+ Compare comp) {
+ __pop_heap_aux(first, last, value_type(first), comp);
+}
+
+template <class RandomAccessIterator, class T, class Distance>
+void __make_heap(RandomAccessIterator first, RandomAccessIterator last, T*,
+ Distance*) {
+ if (last - first < 2) return;
+ Distance len = last - first;
+ Distance parent = (len - 2)/2;
+
+ while (true) {
+ __adjust_heap(first, parent, len, T(*(first + parent)));
+ if (parent == 0) return;
+ parent--;
+ }
+}
+
+template <class RandomAccessIterator>
+inline void make_heap(RandomAccessIterator first, RandomAccessIterator last) {
+ __make_heap(first, last, value_type(first), distance_type(first));
+}
+
+template <class RandomAccessIterator, class Compare, class T, class Distance>
+void __make_heap(RandomAccessIterator first, RandomAccessIterator last,
+ Compare comp, T*, Distance*) {
+ if (last - first < 2) return;
+ Distance len = last - first;
+ Distance parent = (len - 2)/2;
+
+ while (true) {
+ __adjust_heap(first, parent, len, T(*(first + parent)), comp);
+ if (parent == 0) return;
+ parent--;
+ }
+}
+
+template <class RandomAccessIterator, class Compare>
+inline void make_heap(RandomAccessIterator first, RandomAccessIterator last,
+ Compare comp) {
+ __make_heap(first, last, comp, value_type(first), distance_type(first));
+}
+
+template <class RandomAccessIterator>
+void sort_heap(RandomAccessIterator first, RandomAccessIterator last) {
+ while (last - first > 1) pop_heap(first, last--);
+}
+
+template <class RandomAccessIterator, class Compare>
+void sort_heap(RandomAccessIterator first, RandomAccessIterator last,
+ Compare comp) {
+ while (last - first > 1) pop_heap(first, last--, comp);
+}
+
+#endif
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