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02d92e3b70
2001-07-17 Stephen M. Webb <stephen@bregmasoft.com>r All occurrences of the __value_type() and __distance_type() functions, which were required to support the HP STL, have been removed along with all the auxiliary forwarding functions that were required to support their use. The __iterator_category() function was pretty much left alone because there was no benefit to removing it and its use made code just a little more readable. Incidences of distance() with nonstandard argument list were replaced by calls to the standard function (only in the files affected by the removal of the other HP functions). The signature of the rotate() algorithm was changed to match the standard. Headers were reformatted under C++STYLE guidelines (indentation, linebreaks, typename keyword). * include/bits/stl_algo.h: replaced __value_type() and __distance_type() with iterator_traits, eliminated auxiliary support functions required to support said function usage. Changed nonstandard distance() call to standard call. * include/bits/stl_algobase.h: Same. * include/bits/stl_heap.h: Same. * include/bits/stl_numeric.h: Same. * include/bits/stl_uninitialized.h: Same. * include/bits/stl_iterator_base_types.h (__value_type()): Removed. (__distance_type()): Removed. (value_type()): Gone. (distance_type()): Done in. (iterator_category()): Hasta la vista, baby. * include/bits/stl_iterator_base_funcs.h (iterator_category()): Replaced with __iterator_category(). * include/backward/iterator.h: moved definition of value_type(), distance_type(), and iterator_category() out of std:: and into here. * testsuite/23_containers/vector_ctor.cc (test03): New testcases. * testsuite/23_containers/vector_modifiers.cc (test03): New testcases. * testsuite/25_algorithms/rotate.cc: New testcase. * testsuite/25_algorithms/copy.cc: New testcase. * testsuite/25_algorithms/sort.cc: Same. * testsuite/25_algorithms/heap.cc: Same. * testsuite/25_algorithms/partition.cc: Same. * testsuite/25_algorithms/binary_search.cc: Same. * testsuite/26_numerics/sum_diff.cc: Ditto. From-SVN: r44117
747 lines
24 KiB
C++
747 lines
24 KiB
C++
// Bits and pieces used in algorithms -*- C++ -*-
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// Copyright (C) 2001 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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// USA.
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// As a special exception, you may use this file as part of a free software
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// library without restriction. Specifically, if other files instantiate
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// templates or use macros or inline functions from this file, or you compile
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// this file and link it with other files to produce an executable, this
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// file does not by itself cause the resulting executable to be covered by
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// the GNU General Public License. This exception does not however
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// invalidate any other reasons why the executable file might be covered by
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// the GNU General Public License.
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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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* Copyright (c) 1996-1998
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* Silicon Graphics Computer Systems, Inc.
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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. Silicon Graphics 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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/* NOTE: This is an internal header file, included by other STL headers.
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* You should not attempt to use it directly.
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*/
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#ifndef __SGI_STL_INTERNAL_ALGOBASE_H
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#define __SGI_STL_INTERNAL_ALGOBASE_H
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#include <bits/c++config.h>
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#include <bits/stl_pair.h>
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#include <bits/type_traits.h>
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#include <bits/std_cstring.h>
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#include <bits/std_climits.h>
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#include <bits/std_cstdlib.h>
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#include <bits/std_cstddef.h>
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#include <new>
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#include <bits/std_iosfwd.h>
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#include <bits/stl_iterator_base_types.h>
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#include <bits/stl_iterator_base_funcs.h>
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#include <bits/stl_iterator.h>
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#include <bits/concept_check.h>
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namespace std
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{
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// swap and iter_swap
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template<typename _ForwardIter1, typename _ForwardIter2>
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inline void
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iter_swap(_ForwardIter1 __a, _ForwardIter2 __b)
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{
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typedef typename iterator_traits<_ForwardIter1>::value_type _ValueType1;
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typedef typename iterator_traits<_ForwardIter2>::value_type _ValueType2;
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// concept requirements
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__glibcpp_function_requires(_Mutable_ForwardIteratorConcept<_ForwardIter1>);
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__glibcpp_function_requires(_Mutable_ForwardIteratorConcept<_ForwardIter2>);
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__glibcpp_function_requires(_ConvertibleConcept<_ValueType1, _ValueType2>);
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__glibcpp_function_requires(_ConvertibleConcept<_ValueType2, _ValueType1>);
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_ValueType1 __tmp = *__a;
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*__a = *__b;
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*__b = __tmp;
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}
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template<typename _Tp>
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inline void
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swap(_Tp& __a, _Tp& __b)
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{
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// concept requirements
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__glibcpp_function_requires(_SGIAssignableConcept<_Tp>);
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_Tp __tmp = __a;
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__a = __b;
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__b = __tmp;
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}
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//--------------------------------------------------
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// min and max
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#undef min
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#undef max
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template<typename _Tp>
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inline const _Tp&
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min(const _Tp& __a, const _Tp& __b)
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{
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// concept requirements
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__glibcpp_function_requires(_LessThanComparableConcept<_Tp>);
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//return __b < __a ? __b : __a;
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if (__b < __a) return __b; return __a;
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}
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template<typename _Tp>
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inline const _Tp&
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max(const _Tp& __a, const _Tp& __b)
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{
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// concept requirements
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__glibcpp_function_requires(_LessThanComparableConcept<_Tp>);
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//return __a < __b ? __b : __a;
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if (__a < __b) return __b; return __a;
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}
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template<typename _Tp, typename _Compare>
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inline const _Tp&
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min(const _Tp& __a, const _Tp& __b, _Compare __comp)
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{
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//return __comp(__b, __a) ? __b : __a;
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if (__comp(__b, __a)) return __b; return __a;
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}
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template<typename _Tp, typename _Compare>
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inline const _Tp&
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max(const _Tp& __a, const _Tp& __b, _Compare __comp)
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{
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//return __comp(__a, __b) ? __b : __a;
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if (__comp(__a, __b)) return __b; return __a;
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}
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//--------------------------------------------------
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// copy
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// All of these auxiliary functions serve two purposes. (1) Replace
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// calls to copy with memmove whenever possible. (Memmove, not memcpy,
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// because the input and output ranges are permitted to overlap.)
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// (2) If we're using random access iterators, then write the loop as
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// a for loop with an explicit count.
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template<typename _InputIter, typename _OutputIter>
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inline _OutputIter
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__copy(_InputIter __first, _InputIter __last,
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_OutputIter __result,
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input_iterator_tag)
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{
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for ( ; __first != __last; ++__result, ++__first)
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*__result = *__first;
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return __result;
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}
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template<typename _RandomAccessIter, typename _OutputIter>
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inline _OutputIter
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__copy(_RandomAccessIter __first, _RandomAccessIter __last,
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_OutputIter __result,
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random_access_iterator_tag)
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{
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typedef typename iterator_traits<_RandomAccessIter>::difference_type
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_Distance;
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for (_Distance __n = __last - __first; __n > 0; --__n) {
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*__result = *__first;
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++__first;
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++__result;
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}
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return __result;
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}
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template<typename _Tp>
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inline _Tp*
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__copy_trivial(const _Tp* __first, const _Tp* __last, _Tp* __result)
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{
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memmove(__result, __first, sizeof(_Tp) * (__last - __first));
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return __result + (__last - __first);
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}
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template<typename _InputIter, typename _OutputIter>
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inline _OutputIter
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__copy_aux2(_InputIter __first, _InputIter __last,
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_OutputIter __result, __false_type)
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{ return __copy(__first, __last, __result, __iterator_category(__first)); }
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template<typename _InputIter, typename _OutputIter>
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inline _OutputIter
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__copy_aux2(_InputIter __first, _InputIter __last,
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_OutputIter __result, __true_type)
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{ return __copy(__first, __last, __result, __iterator_category(__first)); }
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template<typename _Tp>
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inline _Tp*
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__copy_aux2(_Tp* __first, _Tp* __last,
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_Tp* __result, __true_type)
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{ return __copy_trivial(__first, __last, __result); }
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template<typename _Tp>
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inline _Tp*
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__copy_aux2(const _Tp* __first, const _Tp* __last,
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_Tp* __result, __true_type)
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{ return __copy_trivial(__first, __last, __result); }
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template<typename _InputIter, typename _OutputIter>
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inline _OutputIter
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__copy_ni2(_InputIter __first, _InputIter __last,
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_OutputIter __result, __true_type)
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{
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typedef typename iterator_traits<_InputIter>::value_type
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_ValueType;
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typedef typename __type_traits<_ValueType>::has_trivial_assignment_operator
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_Trivial;
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return _OutputIter(__copy_aux2(__first, __last,
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__result.base(),
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_Trivial()));
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}
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template<typename _InputIter, typename _OutputIter>
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inline _OutputIter
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__copy_ni2(_InputIter __first, _InputIter __last,
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_OutputIter __result, __false_type)
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{
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typedef typename iterator_traits<_InputIter>::value_type
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_ValueType;
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typedef typename __type_traits<_ValueType>::has_trivial_assignment_operator
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_Trivial;
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return __copy_aux2(__first, __last,
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__result,
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_Trivial());
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}
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template<typename _InputIter, typename _OutputIter>
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inline _OutputIter
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__copy_ni1(_InputIter __first, _InputIter __last,
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_OutputIter __result, __true_type)
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{
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typedef typename _Is_normal_iterator<_OutputIter>::_Normal __Normal;
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return __copy_ni2(__first.base(), __last.base(), __result, __Normal());
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}
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template<typename _InputIter, typename _OutputIter>
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inline _OutputIter
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__copy_ni1(_InputIter __first, _InputIter __last,
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_OutputIter __result, __false_type)
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{
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typedef typename _Is_normal_iterator<_OutputIter>::_Normal __Normal;
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return __copy_ni2(__first, __last, __result, __Normal());
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}
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template<typename _InputIter, typename _OutputIter>
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inline _OutputIter
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copy(_InputIter __first, _InputIter __last, _OutputIter __result)
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{
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// concept requirements
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__glibcpp_function_requires(_InputIteratorConcept<_InputIter>);
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__glibcpp_function_requires(_OutputIteratorConcept<_OutputIter,
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typename iterator_traits<_InputIter>::value_type>);
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typedef typename _Is_normal_iterator<_InputIter>::_Normal __Normal;
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return __copy_ni1(__first, __last, __result, __Normal());
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}
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//--------------------------------------------------
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// copy_backward
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template<typename _BidirectionalIter1, typename _BidirectionalIter2>
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inline _BidirectionalIter2
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__copy_backward(_BidirectionalIter1 __first, _BidirectionalIter1 __last,
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_BidirectionalIter2 __result,
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bidirectional_iterator_tag)
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{
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while (__first != __last)
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*--__result = *--__last;
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return __result;
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}
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template<typename _RandomAccessIter, typename _BidirectionalIter>
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inline _BidirectionalIter
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__copy_backward(_RandomAccessIter __first, _RandomAccessIter __last,
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_BidirectionalIter __result,
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random_access_iterator_tag)
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{
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typename iterator_traits<_RandomAccessIter>::difference_type __n;
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for (__n = __last - __first; __n > 0; --__n)
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*--__result = *--__last;
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return __result;
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}
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// This dispatch class is a workaround for compilers that do not
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// have partial ordering of function templates. All we're doing is
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// creating a specialization so that we can turn a call to copy_backward
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// into a memmove whenever possible.
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template<typename _BidirectionalIter1, typename _BidirectionalIter2,
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typename _BoolType>
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struct __copy_backward_dispatch
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{
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static _BidirectionalIter2
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copy(_BidirectionalIter1 __first, _BidirectionalIter1 __last,
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_BidirectionalIter2 __result)
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{
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return __copy_backward(__first, __last,
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__result,
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__iterator_category(__first));
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}
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};
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template<typename _Tp>
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struct __copy_backward_dispatch<_Tp*, _Tp*, __true_type>
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{
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static _Tp*
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copy(const _Tp* __first, const _Tp* __last, _Tp* __result)
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{
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const ptrdiff_t _Num = __last - __first;
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memmove(__result - _Num, __first, sizeof(_Tp) * _Num);
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return __result - _Num;
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}
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};
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template<typename _Tp>
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struct __copy_backward_dispatch<const _Tp*, _Tp*, __true_type>
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{
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static _Tp*
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copy(const _Tp* __first, const _Tp* __last, _Tp* __result)
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{
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return __copy_backward_dispatch<_Tp*, _Tp*, __true_type>
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::copy(__first, __last, __result);
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}
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};
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template<typename _BI1, typename _BI2>
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inline _BI2
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__copy_backward_aux(_BI1 __first, _BI1 __last, _BI2 __result)
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{
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typedef typename __type_traits<typename iterator_traits<_BI2>::value_type>
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::has_trivial_assignment_operator _Trivial;
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return __copy_backward_dispatch<_BI1, _BI2, _Trivial>
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::copy(__first, __last, __result);
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}
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template <typename _BI1, typename _BI2>
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inline _BI2
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__copy_backward_output_normal_iterator(_BI1 __first, _BI1 __last,
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_BI2 __result, __true_type)
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{ return _BI2(__copy_backward_aux(__first, __last, __result.base())); }
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template <typename _BI1, typename _BI2>
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inline _BI2
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__copy_backward_output_normal_iterator(_BI1 __first, _BI1 __last,
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_BI2 __result, __false_type)
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{ return __copy_backward_aux(__first, __last, __result); }
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template <typename _BI1, typename _BI2>
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inline _BI2
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__copy_backward_input_normal_iterator(_BI1 __first, _BI1 __last,
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_BI2 __result, __true_type)
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{
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typedef typename _Is_normal_iterator<_BI2>::_Normal __Normal;
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return __copy_backward_output_normal_iterator(__first.base(), __last.base(),
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__result, __Normal());
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}
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template <typename _BI1, typename _BI2>
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inline _BI2
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__copy_backward_input_normal_iterator(_BI1 __first, _BI1 __last,
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_BI2 __result, __false_type)
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{
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typedef typename _Is_normal_iterator<_BI2>::_Normal __Normal;
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return __copy_backward_output_normal_iterator(__first, __last, __result,
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__Normal());
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}
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template <typename _BI1, typename _BI2>
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inline _BI2
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copy_backward(_BI1 __first, _BI1 __last, _BI2 __result)
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{
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// concept requirements
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__glibcpp_function_requires(_BidirectionalIteratorConcept<_BI1>);
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__glibcpp_function_requires(_Mutable_BidirectionalIteratorConcept<_BI2>);
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__glibcpp_function_requires(_ConvertibleConcept<
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typename iterator_traits<_BI1>::value_type,
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typename iterator_traits<_BI2>::value_type>);
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typedef typename _Is_normal_iterator<_BI1>::_Normal __Normal;
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return __copy_backward_input_normal_iterator(__first, __last, __result,
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__Normal());
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}
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//--------------------------------------------------
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// copy_n (not part of the C++ standard)
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template<typename _InputIter, typename _Size, typename _OutputIter>
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pair<_InputIter, _OutputIter>
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__copy_n(_InputIter __first, _Size __count,
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_OutputIter __result,
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input_iterator_tag)
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{
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for ( ; __count > 0; --__count) {
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*__result = *__first;
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++__first;
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++__result;
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}
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return pair<_InputIter, _OutputIter>(__first, __result);
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}
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template<typename _RAIter, typename _Size, typename _OutputIter>
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inline pair<_RAIter, _OutputIter>
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__copy_n(_RAIter __first, _Size __count,
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_OutputIter __result,
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random_access_iterator_tag)
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{
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_RAIter __last = __first + __count;
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return pair<_RAIter, _OutputIter>(__last, copy(__first, __last, __result));
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}
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template<typename _InputIter, typename _Size, typename _OutputIter>
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inline pair<_InputIter, _OutputIter>
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copy_n(_InputIter __first, _Size __count, _OutputIter __result)
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{
|
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// concept requirements
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__glibcpp_function_requires(_InputIteratorConcept<_InputIter>);
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|
__glibcpp_function_requires(_OutputIteratorConcept<_OutputIter,
|
|
typename iterator_traits<_InputIter>::value_type>);
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return __copy_n(__first, __count, __result, __iterator_category(__first));
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}
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//--------------------------------------------------
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// fill and fill_n
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template<typename _ForwardIter, typename _Tp>
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void
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fill(_ForwardIter __first, _ForwardIter __last, const _Tp& __value)
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{
|
|
// concept requirements
|
|
__glibcpp_function_requires(_Mutable_ForwardIteratorConcept<_ForwardIter>);
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for ( ; __first != __last; ++__first)
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|
*__first = __value;
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|
}
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template<typename _OutputIter, typename _Size, typename _Tp>
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_OutputIter
|
|
fill_n(_OutputIter __first, _Size __n, const _Tp& __value)
|
|
{
|
|
// concept requirements
|
|
__glibcpp_function_requires(_OutputIteratorConcept<_OutputIter,_Tp>);
|
|
|
|
for ( ; __n > 0; --__n, ++__first)
|
|
*__first = __value;
|
|
return __first;
|
|
}
|
|
|
|
// Specialization: for one-byte types we can use memset.
|
|
|
|
inline void
|
|
fill(unsigned char* __first, unsigned char* __last, const unsigned char& __c)
|
|
{
|
|
unsigned char __tmp = __c;
|
|
memset(__first, __tmp, __last - __first);
|
|
}
|
|
|
|
inline void
|
|
fill(signed char* __first, signed char* __last, const signed char& __c)
|
|
{
|
|
signed char __tmp = __c;
|
|
memset(__first, static_cast<unsigned char>(__tmp), __last - __first);
|
|
}
|
|
|
|
inline void
|
|
fill(char* __first, char* __last, const char& __c)
|
|
{
|
|
char __tmp = __c;
|
|
memset(__first, static_cast<unsigned char>(__tmp), __last - __first);
|
|
}
|
|
|
|
template<typename _Size>
|
|
inline unsigned char*
|
|
fill_n(unsigned char* __first, _Size __n, const unsigned char& __c)
|
|
{
|
|
fill(__first, __first + __n, __c);
|
|
return __first + __n;
|
|
}
|
|
|
|
template<typename _Size>
|
|
inline signed char*
|
|
fill_n(char* __first, _Size __n, const signed char& __c)
|
|
{
|
|
fill(__first, __first + __n, __c);
|
|
return __first + __n;
|
|
}
|
|
|
|
template<typename _Size>
|
|
inline char*
|
|
fill_n(char* __first, _Size __n, const char& __c)
|
|
{
|
|
fill(__first, __first + __n, __c);
|
|
return __first + __n;
|
|
}
|
|
|
|
|
|
//--------------------------------------------------
|
|
// equal and mismatch
|
|
|
|
template<typename _InputIter1, typename _InputIter2>
|
|
pair<_InputIter1, _InputIter2>
|
|
mismatch(_InputIter1 __first1, _InputIter1 __last1,
|
|
_InputIter2 __first2)
|
|
{
|
|
// concept requirements
|
|
__glibcpp_function_requires(_InputIteratorConcept<_InputIter1>);
|
|
__glibcpp_function_requires(_InputIteratorConcept<_InputIter2>);
|
|
__glibcpp_function_requires(_EqualityComparableConcept<
|
|
typename iterator_traits<_InputIter1>::value_type>);
|
|
__glibcpp_function_requires(_EqualityComparableConcept<
|
|
typename iterator_traits<_InputIter2>::value_type>);
|
|
|
|
while (__first1 != __last1 && *__first1 == *__first2) {
|
|
++__first1;
|
|
++__first2;
|
|
}
|
|
return pair<_InputIter1, _InputIter2>(__first1, __first2);
|
|
}
|
|
|
|
template<typename _InputIter1, typename _InputIter2, typename _BinaryPredicate>
|
|
pair<_InputIter1, _InputIter2>
|
|
mismatch(_InputIter1 __first1, _InputIter1 __last1,
|
|
_InputIter2 __first2,
|
|
_BinaryPredicate __binary_pred)
|
|
{
|
|
// concept requirements
|
|
__glibcpp_function_requires(_InputIteratorConcept<_InputIter1>);
|
|
__glibcpp_function_requires(_InputIteratorConcept<_InputIter2>);
|
|
|
|
while (__first1 != __last1 && __binary_pred(*__first1, *__first2)) {
|
|
++__first1;
|
|
++__first2;
|
|
}
|
|
return pair<_InputIter1, _InputIter2>(__first1, __first2);
|
|
}
|
|
|
|
template<typename _InputIter1, typename _InputIter2>
|
|
inline bool
|
|
equal(_InputIter1 __first1, _InputIter1 __last1,
|
|
_InputIter2 __first2)
|
|
{
|
|
// concept requirements
|
|
__glibcpp_function_requires(_InputIteratorConcept<_InputIter1>);
|
|
__glibcpp_function_requires(_InputIteratorConcept<_InputIter2>);
|
|
__glibcpp_function_requires(_EqualOpConcept<
|
|
typename iterator_traits<_InputIter1>::value_type,
|
|
typename iterator_traits<_InputIter2>::value_type>);
|
|
|
|
for ( ; __first1 != __last1; ++__first1, ++__first2)
|
|
if (!(*__first1 == *__first2))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
template<typename _InputIter1, typename _InputIter2, typename _BinaryPredicate>
|
|
inline bool
|
|
equal(_InputIter1 __first1, _InputIter1 __last1,
|
|
_InputIter2 __first2,
|
|
_BinaryPredicate __binary_pred)
|
|
{
|
|
// concept requirements
|
|
__glibcpp_function_requires(_InputIteratorConcept<_InputIter1>);
|
|
__glibcpp_function_requires(_InputIteratorConcept<_InputIter2>);
|
|
|
|
for ( ; __first1 != __last1; ++__first1, ++__first2)
|
|
if (!__binary_pred(*__first1, *__first2))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
//--------------------------------------------------
|
|
// lexicographical_compare and lexicographical_compare_3way.
|
|
// (the latter is not part of the C++ standard.)
|
|
|
|
template<typename _InputIter1, typename _InputIter2>
|
|
bool
|
|
lexicographical_compare(_InputIter1 __first1, _InputIter1 __last1,
|
|
_InputIter2 __first2, _InputIter2 __last2)
|
|
{
|
|
// concept requirements
|
|
__glibcpp_function_requires(_InputIteratorConcept<_InputIter1>);
|
|
__glibcpp_function_requires(_InputIteratorConcept<_InputIter2>);
|
|
__glibcpp_function_requires(_LessThanComparableConcept<
|
|
typename iterator_traits<_InputIter1>::value_type>);
|
|
__glibcpp_function_requires(_LessThanComparableConcept<
|
|
typename iterator_traits<_InputIter2>::value_type>);
|
|
|
|
for ( ; __first1 != __last1 && __first2 != __last2
|
|
; ++__first1, ++__first2) {
|
|
if (*__first1 < *__first2)
|
|
return true;
|
|
if (*__first2 < *__first1)
|
|
return false;
|
|
}
|
|
return __first1 == __last1 && __first2 != __last2;
|
|
}
|
|
|
|
template<typename _InputIter1, typename _InputIter2, typename _Compare>
|
|
bool
|
|
lexicographical_compare(_InputIter1 __first1, _InputIter1 __last1,
|
|
_InputIter2 __first2, _InputIter2 __last2,
|
|
_Compare __comp)
|
|
{
|
|
// concept requirements
|
|
__glibcpp_function_requires(_InputIteratorConcept<_InputIter1>);
|
|
__glibcpp_function_requires(_InputIteratorConcept<_InputIter2>);
|
|
|
|
for ( ; __first1 != __last1 && __first2 != __last2
|
|
; ++__first1, ++__first2) {
|
|
if (__comp(*__first1, *__first2))
|
|
return true;
|
|
if (__comp(*__first2, *__first1))
|
|
return false;
|
|
}
|
|
return __first1 == __last1 && __first2 != __last2;
|
|
}
|
|
|
|
inline bool
|
|
lexicographical_compare(const unsigned char* __first1, const unsigned char* __last1,
|
|
const unsigned char* __first2, const unsigned char* __last2)
|
|
{
|
|
const size_t __len1 = __last1 - __first1;
|
|
const size_t __len2 = __last2 - __first2;
|
|
const int __result = memcmp(__first1, __first2, min(__len1, __len2));
|
|
return __result != 0 ? __result < 0 : __len1 < __len2;
|
|
}
|
|
|
|
inline bool
|
|
lexicographical_compare(const char* __first1, const char* __last1,
|
|
const char* __first2, const char* __last2)
|
|
{
|
|
#if CHAR_MAX == SCHAR_MAX
|
|
return lexicographical_compare((const signed char*) __first1,
|
|
(const signed char*) __last1,
|
|
(const signed char*) __first2,
|
|
(const signed char*) __last2);
|
|
#else /* CHAR_MAX == SCHAR_MAX */
|
|
return lexicographical_compare((const unsigned char*) __first1,
|
|
(const unsigned char*) __last1,
|
|
(const unsigned char*) __first2,
|
|
(const unsigned char*) __last2);
|
|
#endif /* CHAR_MAX == SCHAR_MAX */
|
|
}
|
|
|
|
template<typename _InputIter1, typename _InputIter2>
|
|
int
|
|
__lexicographical_compare_3way(_InputIter1 __first1, _InputIter1 __last1,
|
|
_InputIter2 __first2, _InputIter2 __last2)
|
|
{
|
|
while (__first1 != __last1 && __first2 != __last2) {
|
|
if (*__first1 < *__first2)
|
|
return -1;
|
|
if (*__first2 < *__first1)
|
|
return 1;
|
|
++__first1;
|
|
++__first2;
|
|
}
|
|
if (__first2 == __last2) {
|
|
return !(__first1 == __last1);
|
|
}
|
|
else {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
inline int
|
|
__lexicographical_compare_3way(const unsigned char* __first1,
|
|
const unsigned char* __last1,
|
|
const unsigned char* __first2,
|
|
const unsigned char* __last2)
|
|
{
|
|
const ptrdiff_t __len1 = __last1 - __first1;
|
|
const ptrdiff_t __len2 = __last2 - __first2;
|
|
const int __result = memcmp(__first1, __first2, min(__len1, __len2));
|
|
return __result != 0 ? __result
|
|
: (__len1 == __len2 ? 0 : (__len1 < __len2 ? -1 : 1));
|
|
}
|
|
|
|
inline int
|
|
__lexicographical_compare_3way(const char* __first1, const char* __last1,
|
|
const char* __first2, const char* __last2)
|
|
{
|
|
#if CHAR_MAX == SCHAR_MAX
|
|
return __lexicographical_compare_3way(
|
|
(const signed char*) __first1,
|
|
(const signed char*) __last1,
|
|
(const signed char*) __first2,
|
|
(const signed char*) __last2);
|
|
#else
|
|
return __lexicographical_compare_3way((const unsigned char*) __first1,
|
|
(const unsigned char*) __last1,
|
|
(const unsigned char*) __first2,
|
|
(const unsigned char*) __last2);
|
|
#endif
|
|
}
|
|
|
|
template<typename _InputIter1, typename _InputIter2>
|
|
int
|
|
lexicographical_compare_3way(_InputIter1 __first1, _InputIter1 __last1,
|
|
_InputIter2 __first2, _InputIter2 __last2)
|
|
{
|
|
// concept requirements
|
|
__glibcpp_function_requires(_InputIteratorConcept<_InputIter1>);
|
|
__glibcpp_function_requires(_InputIteratorConcept<_InputIter2>);
|
|
__glibcpp_function_requires(_LessThanComparableConcept<
|
|
typename iterator_traits<_InputIter1>::value_type>);
|
|
__glibcpp_function_requires(_LessThanComparableConcept<
|
|
typename iterator_traits<_InputIter2>::value_type>);
|
|
|
|
return __lexicographical_compare_3way(__first1, __last1, __first2, __last2);
|
|
}
|
|
|
|
} // namespace std
|
|
|
|
#endif /* __SGI_STL_INTERNAL_ALGOBASE_H */
|
|
|
|
// Local Variables:
|
|
// mode:C++
|
|
// End:
|