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729e3d3f01
2001-11-02 Phil Edwards <pme@gcc.gnu.org> * config/io/c_io_stdio.h: Correct grammar in comments. * docs/doxygen/Intro.3: Expand "top-level" man page. * docs/doxygen/doxygroups.cc: New module definitions (comments). * docs/doxygen/mainpage.doxy: Tweaks. * docs/doxygen/run_doxygen: Update Doxygen version, massage man pages. Add @file hooks so that headers are considered to be documented. * include/bits/basic_ios.h, include/bits/basic_file.h, include/bits/basic_string.h, include/bits/boost_concept_check.h, include/bits/char_traits.h, include/bits/codecvt.h, include/bits/concept_check.h, include/bits/cpp_type_traits.h, include/bits/fpos.h, include/bits/gslice.h, include/bits/gslice_array.h, include/bits/indirect_array.h, include/bits/ios_base.h, include/bits/locale_facets.h, include/bits/localefwd.h, include/bits/mask_array.h, include/bits/pthread_allocimpl.h, include/bits/slice.h, include/bits/slice_array.h, include/bits/std_algorithm.h, include/bits/std_bitset.h, include/bits/std_complex.h, include/bits/std_deque.h, include/bits/std_fstream.h, include/bits/std_functional.h, include/bits/std_iomanip.h, include/bits/std_ios.h, include/bits/std_iosfwd.h, include/bits/std_iostream.h, include/bits/std_istream.h, include/bits/std_iterator.h, include/bits/std_limits.h, include/bits/std_list.h, include/bits/std_locale.h, include/bits/std_map.h, include/bits/std_memory.h, include/bits/std_numeric.h, include/bits/std_ostream.h, include/bits/std_queue.h, include/bits/std_set.h, include/bits/std_sstream.h, include/bits/std_stack.h, include/bits/std_streambuf.h, include/bits/std_string.h, include/bits/std_utility.h, include/bits/std_valarray.h, include/bits/std_vector.h, include/bits/stl_algo.h, include/bits/stl_alloc.h, include/bits/stl_bvector.h, include/bits/stl_construct.h, include/bits/stl_deque.h, include/bits/stl_heap.h, include/bits/stl_iterator.h, include/bits/stl_iterator_base_funcs.h, include/bits/stl_iterator_base_types.h, include/bits/stl_list.h, include/bits/stl_map.h, include/bits/stl_multimap.h, include/bits/stl_multiset.h, include/bits/stl_numeric.h, include/bits/stl_pair.h, include/bits/stl_pthread_alloc.h, include/bits/stl_queue.h, include/bits/stl_raw_storage_iter.h, include/bits/stl_relops.h, include/bits/stl_set.h, include/bits/stl_stack.h, include/bits/stl_tempbuf.h, include/bits/stl_threads.h, include/bits/stl_tree.h, include/bits/stl_uninitialized.h, include/bits/stl_vector.h, include/bits/stream_iterator.h, include/bits/streambuf_iterator.h, include/bits/stringfwd.h, include/bits/type_traits.h, include/bits/valarray_array.h, include/bits/valarray_meta.h: Add hooks, tweak comments only. * include/bits/stl_algobase.h (swap, min, iter_swap): Also document these functions. * include/bits/stl_function.h: Tweak link comments. From-SVN: r46717
775 lines
25 KiB
C++
775 lines
25 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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/** @file stl_algobase.h
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* This is an internal header file, included by other library 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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/**
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* @brief Swaps the contents of two iterators.
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* @param a An iterator.
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* @param b Another iterator.
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* @return Nothing.
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*
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* This function swaps the values pointed to by two iterators, not the
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* iterators themselves.
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*/
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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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/**
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* @brief Swaps two values.
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* @param a A thing of arbitrary type.
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* @param b Another thing of arbitrary type.
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* @return Nothing.
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*
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* This is the simple classic generic implementation. It will work on
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* any type which has a copy constructor and an assignment operator.
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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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/**
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* @brief This does what you think it does.
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* @param a A thing of arbitrary type.
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* @param b Another thing of arbitrary type.
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* @return The lesser of the parameters.
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*
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* This is the simple classic generic implementation. It will work on
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* temporary expressions, since they are only evaluated once, unlike a
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* preprocessor macro.
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*/
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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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|
|
|
//--------------------------------------------------
|
|
// copy_n (not part of the C++ standard)
|
|
|
|
template<typename _InputIter, typename _Size, typename _OutputIter>
|
|
pair<_InputIter, _OutputIter>
|
|
__copy_n(_InputIter __first, _Size __count,
|
|
_OutputIter __result,
|
|
input_iterator_tag)
|
|
{
|
|
for ( ; __count > 0; --__count) {
|
|
*__result = *__first;
|
|
++__first;
|
|
++__result;
|
|
}
|
|
return pair<_InputIter, _OutputIter>(__first, __result);
|
|
}
|
|
|
|
template<typename _RAIter, typename _Size, typename _OutputIter>
|
|
inline pair<_RAIter, _OutputIter>
|
|
__copy_n(_RAIter __first, _Size __count,
|
|
_OutputIter __result,
|
|
random_access_iterator_tag)
|
|
{
|
|
_RAIter __last = __first + __count;
|
|
return pair<_RAIter, _OutputIter>(__last, copy(__first, __last, __result));
|
|
}
|
|
|
|
template<typename _InputIter, typename _Size, typename _OutputIter>
|
|
inline pair<_InputIter, _OutputIter>
|
|
copy_n(_InputIter __first, _Size __count, _OutputIter __result)
|
|
{
|
|
// concept requirements
|
|
__glibcpp_function_requires(_InputIteratorConcept<_InputIter>)
|
|
__glibcpp_function_requires(_OutputIteratorConcept<_OutputIter,
|
|
typename iterator_traits<_InputIter>::value_type>)
|
|
|
|
return __copy_n(__first, __count, __result, __iterator_category(__first));
|
|
}
|
|
|
|
//--------------------------------------------------
|
|
// fill and fill_n
|
|
|
|
|
|
template<typename _ForwardIter, typename _Tp>
|
|
void
|
|
fill(_ForwardIter __first, _ForwardIter __last, const _Tp& __value)
|
|
{
|
|
// concept requirements
|
|
__glibcpp_function_requires(_Mutable_ForwardIteratorConcept<_ForwardIter>)
|
|
|
|
for ( ; __first != __last; ++__first)
|
|
*__first = __value;
|
|
}
|
|
|
|
template<typename _OutputIter, typename _Size, typename _Tp>
|
|
_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:
|