_heap.h

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// -*- C++ -*-
 
#ifndef _RWSTD_RW_HEAP_H_INCLUDED
#define _RWSTD_RW_HEAP_H_INCLUDED
 
#ifndef _RWSTD_RW_ALGOBASE_H_INCLUDED
#  include <rw/_algobase.h>
#endif   // _RWSTD_RW_ALGOBASE_H_INCLUDED
 
#ifndef _RWSTD_RW_ITERBASE_H_INCLUDED
#  include <rw/_iterbase.h>
#endif   // _RWSTD_RW_ITERBASE_H_INCLUDED
 
 
_RWSTD_NAMESPACE (std) {
 
 
// 25.3.6 - Heap operations
 
// helper to work around the lack of iterator_traits
_EXPORT
template <class _RandomAccessIter, class _Dist, class _TypeT,
          class _Compare>
void __push_heap (_RandomAccessIter, _Dist, _Dist, _TypeT, _Compare);
 
 
template <class _RandomAccessIter, class _Dist, class _Compare>
inline void
__push_heap (_RandomAccessIter __first, _RandomAccessIter __last,
             _Dist*, _Compare __comp)
{
    __push_heap (__first, _Dist (__last - __first), _Dist (), *__last, __comp);
}
 
// 25.3.6.1
template <class _RandomAccessIter, class _Compare>
inline void push_heap (_RandomAccessIter __first, _RandomAccessIter __last,
                       _Compare __comp)
{
    _RWSTD_ASSERT_RANGE (__first, __last);
 
    if (!(__first == __last))
        __push_heap (__first, --__last,
                     _RWSTD_DIFFERENCE_TYPE (_RandomAccessIter), __comp);
}
 
 
// 25.3.6.1
template <class _RandomAccessIter>
inline void push_heap (_RandomAccessIter __first, _RandomAccessIter __last)
{
    _STD::push_heap (__first, __last, _RWSTD_LESS (_RandomAccessIter));
}
 
 
_EXPORT
template <class _RandomAccessIter, class _Dist, class _TypeT,
          class _Compare>
void __adjust_heap (_RandomAccessIter, _Dist, _Dist, _TypeT, _Compare);
 
 
// helper to work around the lack of iterator_traits
template <class _RandomAccessIter, class _TypeT, class _Compare, class _Dist>
inline void
__pop_heap (_RandomAccessIter __first, _RandomAccessIter __last,
            _RandomAccessIter __res, _TypeT __val, _Compare __cmp, _Dist*)
{
    *__res = *__first;
    __adjust_heap (__first, _Dist (), _Dist (__last - __first), __val, __cmp);
}
 
 
// 25.3.6.2
template <class _RandomAccessIter, class _Compare>
inline void
pop_heap (_RandomAccessIter __first, _RandomAccessIter __last, _Compare __comp)
{
    _RWSTD_ASSERT_RANGE (__first, __last);
 
    if (!(__first == __last)) {
        --__last;
        __pop_heap (__first, __last, __last, *__last, __comp,
                    _RWSTD_DIFFERENCE_TYPE (_RandomAccessIter));
    }
}
 
 
// 25.3.6.2
template <class _RandomAccessIter>
inline void pop_heap (_RandomAccessIter __first, _RandomAccessIter __last)
{
    _STD::pop_heap (__first, __last, _RWSTD_LESS (_RandomAccessIter));
}
 
 
_EXPORT
template <class _RandomAccessIter, class _Compare, class _Dist>
void __make_heap (_RandomAccessIter, _RandomAccessIter, _Compare, _Dist*);
 
 
// 25.3.6.3
template <class _RandomAccessIter, class _Compare>
inline void make_heap (_RandomAccessIter __first, _RandomAccessIter __last,
                       _Compare __comp)
{
    _RWSTD_ASSERT_RANGE (__first, __last);
 
    if (!(__last - __first < 2))
        __make_heap (__first, __last, __comp,
                     _RWSTD_DIFFERENCE_TYPE (_RandomAccessIter));
}
 
 
// 25.3.6.3
template <class _RandomAccessIter>
inline void make_heap (_RandomAccessIter __first, _RandomAccessIter __last)
{
    _STD::make_heap (__first, __last, _RWSTD_LESS (_RandomAccessIter));
}
 
 
// 25.3.6.4
template <class _RandomAccessIter, class _Compare>
inline void sort_heap (_RandomAccessIter __first, _RandomAccessIter __last,
                       _Compare __comp)
{
    _RWSTD_ASSERT_RANGE (__first, __last);
 
    for (; __last - __first > 1; --__last)
        _STD::pop_heap (__first, __last, __comp);
}
 
 
// 25.3.6.4
template <class _RandomAccessIter>
inline void sort_heap (_RandomAccessIter __first, _RandomAccessIter __last)
{
    _STD::sort_heap (__first, __last, _RWSTD_LESS (_RandomAccessIter));
}
 
 
}   // namespace std
 
 
#ifdef _RWSTD_NO_IMPLICIT_INCLUSION
#  include <rw/_heap.cc>
#endif
 
 
#endif   // _RWSTD_RW_HEAP_H_INCLUDED