282 lines
8.1 KiB
C++
282 lines
8.1 KiB
C++
/***************************************************************************
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*
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* _algobase.h - Declarations and inline definitions of frequently used
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* C++ Standard Library algorithms
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*
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* This is an internal header file used to implement the C++ Standard
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* Library. It should never be #included directly by a program.
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*
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* $Id: _algobase.h 550991 2007-06-26 23:58:07Z sebor $
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*
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***************************************************************************
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* permissions and limitations under the License.
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*
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* Copyright 1994-2005 Rogue Wave Software.
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*
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***************************************************************************
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*
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* Copyright (c) 1994
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* Hewlett-Packard Company
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*
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* Permission to use, copy, modify, distribute and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation. Hewlett-Packard Company makes no
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* representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*
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**************************************************************************/
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#ifndef _RWSTD_RW_ALGOBASE_H_INCLUDED
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#define _RWSTD_RW_ALGOBASE_H_INCLUDED
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#include <rw/_pair.h> // for pair
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#include <rw/_iterbase.h> // for iterator_traits, __rw_debug_iter
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_RWSTD_NAMESPACE (std) {
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// 25.3.7, p1
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template <class _TypeT>
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inline const _TypeT& (min)(const _TypeT& __a, const _TypeT& __b)
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{
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return __b < __a ? __b : __a;
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}
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template <class _TypeT, class _Compare>
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inline const _TypeT& (min)(const _TypeT& __a, const _TypeT& __b, _Compare __cmp)
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{
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return __cmp (__b, __a) ? __b : __a;
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}
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// 25.3.7, p3
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template <class _TypeT>
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inline const _TypeT& (max)(const _TypeT& __a, const _TypeT& __b)
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{
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return __a < __b ? __b : __a;
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}
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template <class _TypeT, class _Compare>
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inline const _TypeT&
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(max)(const _TypeT& __a, const _TypeT& __b, _Compare __cmp)
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{
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return !(__cmp (__a, __b) == false) ? __b : __a;
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}
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// 25.2.1, p1
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template <class _InputIter, class _OutputIter>
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inline _OutputIter
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copy (_InputIter __first, _InputIter __last, _OutputIter __res)
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{
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_RWSTD_ASSERT_RANGE (__first, __last);
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for (; !(__first == __last); ++__first,++__res)
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*__res = *__first;
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return __res;
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}
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// 25.2.1, p5
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template <class _BidirIter1, class _BidirIter2>
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inline _BidirIter2
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copy_backward (_BidirIter1 __first, _BidirIter1 __last, _BidirIter2 __res)
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{
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_RWSTD_ASSERT_RANGE (__first, __last);
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while (!(__first == __last))
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*--__res = *--__last;
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return __res;
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}
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// 25.2.5
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template <class _FwdIter, class _TypeT>
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inline void fill (_FwdIter __first, _FwdIter __last, const _TypeT &__val)
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{
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_RWSTD_ASSERT_RANGE (__first, __last);
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for ( ; !(__first == __last); ++__first)
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*__first = __val;
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}
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template <class _OutputIter, class _Size, class _TypeT>
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inline void fill_n (_OutputIter __first, _Size __n, const _TypeT &__val)
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{
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// Size must be convertible to integral type but need not itself be one
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// Complexity:
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// Exactly n if n is positive, or 0 otherwise, assignments.
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// (see lwg issue 426 for the complexity when n is not positive)
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for (_RWSTD_PTRDIFF_T __inx = __n; 0 < __inx; --__inx, ++__first)
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*__first = __val;
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}
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} // namespace std
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_RWSTD_NAMESPACE (__rw) {
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// `less than' function object - used by non-predicate forms
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// of algorithms to invoke the predicate forms for code reuse
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struct __rw_lt
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{
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template <class _TypeT, class _TypeU>
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bool operator() (const _TypeT &__lhs, const _TypeU &__rhs) const {
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// cast away constness in case operator<
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// takes a non-const argument
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return _RWSTD_CONST_CAST (_TypeT&, __lhs)
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< _RWSTD_CONST_CAST (_TypeU&, __rhs);
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}
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};
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# define _RWSTD_LESS(ignore) _RW::__rw_lt ()
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// swaps values of 2 (possibly distinct) types
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template <class _TypeT, class _TypeU>
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inline void __rw_swap (_TypeT& __a, _TypeU& __b)
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{
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// _TypeT must satisfy Assignable and CopyConstructible
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_TypeT __tmp = __a;
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__a = __b;
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__b = __tmp;
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}
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} // namespace __rw
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_RWSTD_NAMESPACE (std) {
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// 25.2.2, p1
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template <class _TypeT>
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inline void swap (_TypeT& __a, _TypeT& __b)
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{
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// lwg issue 227 - _TypeT must satisfy Assignable and CopyConstructible
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_TypeT __tmp = __a;
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__a = __b;
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__b = __tmp;
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}
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// 25.2.2, p7
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template <class _FwdIter1, class _FwdIter2>
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inline void iter_swap (_FwdIter1 __a, _FwdIter2 __b)
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{
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// std::iterator_traits<_FwdIter[12]>::value_type must satisfy
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// both Assignable and CopyConstructible
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#ifndef _RWSTD_NO_CLASS_PARTIAL_SPEC
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// accommodate _FwdIter::operator*() that returns an rvalue that
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// doesn't bind to a non-const reference e.g., vector<bool>::reference
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_TYPENAME iterator_traits<_FwdIter1>::reference __ref1 (*__a);
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_TYPENAME iterator_traits<_FwdIter2>::reference __ref2 (*__b);
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_RW::__rw_swap (__ref1, __ref2);
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#else // if defined (_RWSTD_NO_CLASS_PARTIAL_SPEC)
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// the return type of std::iterator_traits<_FwdIter>::operator*()
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// must be (convertible to) a true reference (i.e., value_type&)
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_RW::__rw_swap (*__a, *__b);
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#endif // _RWSTD_NO_CLASS_PARTIAL_SPEC
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}
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// 25.1.7 - Mismatch
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template <class _InputIter1, class _InputIter2>
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inline pair<_InputIter1, _InputIter2>
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mismatch (_InputIter1 __first1, _InputIter1 __last1, _InputIter2 __first2)
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{
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_RWSTD_ASSERT_RANGE (__first1, __last1);
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while (!(__first1 == __last1) && *__first1 == *__first2) {
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++__first1;
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++__first2;
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}
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return pair<_InputIter1, _InputIter2> (__first1, __first2);
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}
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template <class _InputIter1, class _InputIter2, class _BinaryPredicate>
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inline pair<_InputIter1, _InputIter2>
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mismatch (_InputIter1 __first1, _InputIter1 __last1,
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_InputIter2 __first2, _BinaryPredicate __pred)
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{
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_RWSTD_ASSERT_RANGE (__first1, __last1);
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while ( !(__first1 == __last1)
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&& !(__pred (*__first1, *__first2) == false)) {
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++__first1;
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++__first2;
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}
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return pair<_InputIter1, _InputIter2> (__first1, __first2);
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}
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// 25.1.8 - Equal
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template <class _InputIter1, class _InputIter2>
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inline bool
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equal (_InputIter1 __first1, _InputIter1 __last1, _InputIter2 __first2)
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{
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return __last1 == _STD::mismatch (__first1, __last1, __first2).first;
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}
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template <class _InputIter1, class _InputIter2, class _BinaryPredicate>
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inline bool equal (_InputIter1 __first1, _InputIter1 __last1,
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_InputIter2 __first2, _BinaryPredicate __pred)
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{
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return __last1 == _STD::mismatch (__first1, __last1,
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__first2, __pred).first;
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}
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// 25.3.8 - Lexicographical Comparison
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_EXPORT
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template <class _InputIter1, class _InputIter2>
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bool lexicographical_compare (_InputIter1 __first1, _InputIter1 __last1,
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_InputIter2 __first2, _InputIter2 __last2);
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_EXPORT
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template <class _InputIter1, class _InputIter2, class _Compare>
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bool lexicographical_compare(_InputIter1 __first1, _InputIter1 __last1,
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_InputIter2 __first2, _InputIter2 __last2,
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_Compare __comp);
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} // namespace std
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#ifdef _RWSTD_NO_IMPLICIT_INCLUSION
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# include <rw/_algobase.cc>
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#endif // _RWSTD_NO_IMPLICIT_INCLUSION
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#endif // _RWSTD_RW_ALGOBASE_H_INCLUDED
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