41104fd541
2001-06-22 Phil Edwards <pme@sources.redhat.com> * include/*: Revert comment/license change from yesterday for all except libsupc++/unwind-cxx.h. * src/bitset.cc: Likewise. * src/strstream.cc: Likewise. From-SVN: r43513
315 lines
10 KiB
C++
315 lines
10 KiB
C++
/*
|
|
*
|
|
* 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.
|
|
*
|
|
* Copyright (c) 1997
|
|
* Silicon Graphics Computer Systems, Inc.
|
|
*
|
|
* 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. Silicon Graphics makes no
|
|
* representations about the suitability of this software for any
|
|
* purpose. It is provided "as is" without express or implied warranty.
|
|
*/
|
|
|
|
/* NOTE: This is an internal header file, included by other STL headers.
|
|
* You should not attempt to use it directly.
|
|
*/
|
|
|
|
#ifndef _CPP_BITS_STL_HEAP_H
|
|
#define _CPP_BITS_STL_HEAP_H 1
|
|
|
|
namespace std
|
|
{
|
|
|
|
// Heap-manipulation functions: push_heap, pop_heap, make_heap, sort_heap.
|
|
|
|
template <class _RandomAccessIterator, class _Distance, class _Tp>
|
|
void
|
|
__push_heap(_RandomAccessIterator __first,
|
|
_Distance __holeIndex, _Distance __topIndex, _Tp __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 _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>
|
|
inline void
|
|
push_heap(_RandomAccessIterator __first, _RandomAccessIterator __last)
|
|
{
|
|
// concept requirements
|
|
__glibcpp_function_requires(_Mutable_RandomAccessIteratorConcept<
|
|
_RandomAccessIterator>);
|
|
__glibcpp_function_requires(_LessThanComparableConcept<
|
|
typename iterator_traits<_RandomAccessIterator>::value_type>);
|
|
|
|
__push_heap_aux(__first, __last,
|
|
__distance_type(__first), __value_type(__first));
|
|
}
|
|
|
|
template <class _RandomAccessIterator, class _Distance, class _Tp,
|
|
class _Compare>
|
|
void
|
|
__push_heap(_RandomAccessIterator __first, _Distance __holeIndex,
|
|
_Distance __topIndex, _Tp __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 _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>
|
|
inline void
|
|
push_heap(_RandomAccessIterator __first, _RandomAccessIterator __last,
|
|
_Compare __comp)
|
|
{
|
|
// concept requirements
|
|
__glibcpp_function_requires(_Mutable_RandomAccessIteratorConcept<
|
|
_RandomAccessIterator>);
|
|
|
|
__push_heap_aux(__first, __last, __comp,
|
|
__distance_type(__first), __value_type(__first));
|
|
}
|
|
|
|
template <class _RandomAccessIterator, class _Distance, class _Tp>
|
|
void
|
|
__adjust_heap(_RandomAccessIterator __first, _Distance __holeIndex,
|
|
_Distance __len, _Tp __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 _Tp, class _Distance>
|
|
inline void
|
|
__pop_heap(_RandomAccessIterator __first, _RandomAccessIterator __last,
|
|
_RandomAccessIterator __result, _Tp __value, _Distance*)
|
|
{
|
|
*__result = *__first;
|
|
__adjust_heap(__first, _Distance(0), _Distance(__last - __first), __value);
|
|
}
|
|
|
|
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)), __distance_type(__first));
|
|
}
|
|
|
|
template <class _RandomAccessIterator>
|
|
inline void pop_heap(_RandomAccessIterator __first,
|
|
_RandomAccessIterator __last)
|
|
{
|
|
// concept requirements
|
|
__glibcpp_function_requires(_Mutable_RandomAccessIteratorConcept<
|
|
_RandomAccessIterator>);
|
|
__glibcpp_function_requires(_LessThanComparableConcept<
|
|
typename iterator_traits<_RandomAccessIterator>::value_type>);
|
|
|
|
__pop_heap_aux(__first, __last, __value_type(__first));
|
|
}
|
|
|
|
template <class _RandomAccessIterator, class _Distance,
|
|
class _Tp, class _Compare>
|
|
void
|
|
__adjust_heap(_RandomAccessIterator __first, _Distance __holeIndex,
|
|
_Distance __len, _Tp __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 _Tp, class _Compare,
|
|
class _Distance>
|
|
inline void
|
|
__pop_heap(_RandomAccessIterator __first, _RandomAccessIterator __last,
|
|
_RandomAccessIterator __result, _Tp __value, _Compare __comp,
|
|
_Distance*)
|
|
{
|
|
*__result = *__first;
|
|
__adjust_heap(__first, _Distance(0), _Distance(__last - __first),
|
|
__value, __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,
|
|
__distance_type(__first));
|
|
}
|
|
|
|
template <class _RandomAccessIterator, class _Compare>
|
|
inline void
|
|
pop_heap(_RandomAccessIterator __first,
|
|
_RandomAccessIterator __last, _Compare __comp)
|
|
{
|
|
// concept requirements
|
|
__glibcpp_function_requires(_Mutable_RandomAccessIteratorConcept<
|
|
_RandomAccessIterator>);
|
|
|
|
__pop_heap_aux(__first, __last, __value_type(__first), __comp);
|
|
}
|
|
|
|
template <class _RandomAccessIterator, class _Tp, class _Distance>
|
|
void
|
|
__make_heap(_RandomAccessIterator __first,
|
|
_RandomAccessIterator __last, _Tp*, _Distance*)
|
|
{
|
|
if (__last - __first < 2) return;
|
|
_Distance __len = __last - __first;
|
|
_Distance __parent = (__len - 2)/2;
|
|
|
|
while (true) {
|
|
__adjust_heap(__first, __parent, __len, _Tp(*(__first + __parent)));
|
|
if (__parent == 0) return;
|
|
__parent--;
|
|
}
|
|
}
|
|
|
|
template <class _RandomAccessIterator>
|
|
inline void
|
|
make_heap(_RandomAccessIterator __first, _RandomAccessIterator __last)
|
|
{
|
|
// concept requirements
|
|
__glibcpp_function_requires(_Mutable_RandomAccessIteratorConcept<
|
|
_RandomAccessIterator>);
|
|
__glibcpp_function_requires(_LessThanComparableConcept<
|
|
typename iterator_traits<_RandomAccessIterator>::value_type>);
|
|
|
|
__make_heap(__first, __last,
|
|
__value_type(__first), __distance_type(__first));
|
|
}
|
|
|
|
template <class _RandomAccessIterator, class _Compare,
|
|
class _Tp, class _Distance>
|
|
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;
|
|
|
|
while (true) {
|
|
__adjust_heap(__first, __parent, __len, _Tp(*(__first + __parent)),
|
|
__comp);
|
|
if (__parent == 0) return;
|
|
__parent--;
|
|
}
|
|
}
|
|
|
|
template <class _RandomAccessIterator, class _Compare>
|
|
inline void
|
|
make_heap(_RandomAccessIterator __first,
|
|
_RandomAccessIterator __last, _Compare __comp)
|
|
{
|
|
// concept requirements
|
|
__glibcpp_function_requires(_Mutable_RandomAccessIteratorConcept<
|
|
_RandomAccessIterator>);
|
|
|
|
__make_heap(__first, __last, __comp,
|
|
__value_type(__first), __distance_type(__first));
|
|
}
|
|
|
|
template <class _RandomAccessIterator>
|
|
void sort_heap(_RandomAccessIterator __first, _RandomAccessIterator __last)
|
|
{
|
|
// concept requirements
|
|
__glibcpp_function_requires(_Mutable_RandomAccessIteratorConcept<
|
|
_RandomAccessIterator>);
|
|
__glibcpp_function_requires(_LessThanComparableConcept<
|
|
typename iterator_traits<_RandomAccessIterator>::value_type>);
|
|
|
|
while (__last - __first > 1)
|
|
pop_heap(__first, __last--);
|
|
}
|
|
|
|
template <class _RandomAccessIterator, class _Compare>
|
|
void
|
|
sort_heap(_RandomAccessIterator __first,
|
|
_RandomAccessIterator __last, _Compare __comp)
|
|
{
|
|
// concept requirements
|
|
__glibcpp_function_requires(_Mutable_RandomAccessIteratorConcept<
|
|
_RandomAccessIterator>);
|
|
|
|
while (__last - __first > 1)
|
|
pop_heap(__first, __last--, __comp);
|
|
}
|
|
|
|
} // namespace std
|
|
|
|
#endif /* _CPP_BITS_STL_HEAP_H */
|
|
|
|
// Local Variables:
|
|
// mode:C++
|
|
// End:
|