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Diffstat (limited to 'gcc-4.4.3/libstdc++-v3/include/bits/stl_algobase.h')
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diff --git a/gcc-4.4.3/libstdc++-v3/include/bits/stl_algobase.h b/gcc-4.4.3/libstdc++-v3/include/bits/stl_algobase.h new file mode 100644 index 000000000..2cef9237d --- /dev/null +++ b/gcc-4.4.3/libstdc++-v3/include/bits/stl_algobase.h @@ -0,0 +1,1153 @@ +// Core algorithmic facilities -*- C++ -*- + +// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 +// Free Software Foundation, Inc. +// +// This file is part of the GNU ISO C++ Library. This library is free +// software; you can redistribute it and/or modify it under the +// terms of the GNU General Public License as published by the +// Free Software Foundation; either version 3, or (at your option) +// any later version. + +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// Under Section 7 of GPL version 3, you are granted additional +// permissions described in the GCC Runtime Library Exception, version +// 3.1, as published by the Free Software Foundation. + +// You should have received a copy of the GNU General Public License and +// a copy of the GCC Runtime Library Exception along with this program; +// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see +// <http://www.gnu.org/licenses/>. + +/* + * + * Copyright (c) 1994 + * Hewlett-Packard Company + * + * Permission to use, copy, modify, distribute and sell this software + * and its documentation for any purpose is hereby granted without fee, + * provided that the above copyright notice appear in all copies and + * that both that copyright notice and this permission notice appear + * in supporting documentation. Hewlett-Packard Company makes no + * representations about the suitability of this software for any + * purpose. It is provided "as is" without express or implied warranty. + * + * + * Copyright (c) 1996-1998 + * Silicon Graphics Computer Systems, Inc. + * + * Permission to use, copy, modify, distribute and sell this software + * and its documentation for any purpose is hereby granted without fee, + * provided that the above copyright notice appear in all copies and + * that both that copyright notice and this permission notice appear + * in supporting documentation. Silicon Graphics makes no + * representations about the suitability of this software for any + * purpose. It is provided "as is" without express or implied warranty. + */ + +/** @file stl_algobase.h + * This is an internal header file, included by other library headers. + * You should not attempt to use it directly. + */ + +#ifndef _STL_ALGOBASE_H +#define _STL_ALGOBASE_H 1 + +#include <bits/c++config.h> +#include <cstddef> +#include <bits/functexcept.h> +#include <bits/cpp_type_traits.h> +#include <ext/type_traits.h> +#include <ext/numeric_traits.h> +#include <bits/stl_pair.h> +#include <bits/stl_iterator_base_types.h> +#include <bits/stl_iterator_base_funcs.h> +#include <bits/stl_iterator.h> +#include <bits/concept_check.h> +#include <debug/debug.h> +#include <bits/move.h> // For std::swap and _GLIBCXX_MOVE + +_GLIBCXX_BEGIN_NAMESPACE(std) + + // See http://gcc.gnu.org/ml/libstdc++/2004-08/msg00167.html: in a + // nutshell, we are partially implementing the resolution of DR 187, + // when it's safe, i.e., the value_types are equal. + template<bool _BoolType> + struct __iter_swap + { + template<typename _ForwardIterator1, typename _ForwardIterator2> + static void + iter_swap(_ForwardIterator1 __a, _ForwardIterator2 __b) + { + typedef typename iterator_traits<_ForwardIterator1>::value_type + _ValueType1; + _ValueType1 __tmp = _GLIBCXX_MOVE(*__a); + *__a = _GLIBCXX_MOVE(*__b); + *__b = _GLIBCXX_MOVE(__tmp); + } + }; + + template<> + struct __iter_swap<true> + { + template<typename _ForwardIterator1, typename _ForwardIterator2> + static void + iter_swap(_ForwardIterator1 __a, _ForwardIterator2 __b) + { + swap(*__a, *__b); + } + }; + + /** + * @brief Swaps the contents of two iterators. + * @ingroup mutating_algorithms + * @param a An iterator. + * @param b Another iterator. + * @return Nothing. + * + * This function swaps the values pointed to by two iterators, not the + * iterators themselves. + */ + template<typename _ForwardIterator1, typename _ForwardIterator2> + inline void + iter_swap(_ForwardIterator1 __a, _ForwardIterator2 __b) + { + typedef typename iterator_traits<_ForwardIterator1>::value_type + _ValueType1; + typedef typename iterator_traits<_ForwardIterator2>::value_type + _ValueType2; + + // concept requirements + __glibcxx_function_requires(_Mutable_ForwardIteratorConcept< + _ForwardIterator1>) + __glibcxx_function_requires(_Mutable_ForwardIteratorConcept< + _ForwardIterator2>) + __glibcxx_function_requires(_ConvertibleConcept<_ValueType1, + _ValueType2>) + __glibcxx_function_requires(_ConvertibleConcept<_ValueType2, + _ValueType1>) + + typedef typename iterator_traits<_ForwardIterator1>::reference + _ReferenceType1; + typedef typename iterator_traits<_ForwardIterator2>::reference + _ReferenceType2; + std::__iter_swap<__are_same<_ValueType1, _ValueType2>::__value + && __are_same<_ValueType1&, _ReferenceType1>::__value + && __are_same<_ValueType2&, _ReferenceType2>::__value>:: + iter_swap(__a, __b); + } + + /** + * @brief Swap the elements of two sequences. + * @ingroup mutating_algorithms + * @param first1 A forward iterator. + * @param last1 A forward iterator. + * @param first2 A forward iterator. + * @return An iterator equal to @p first2+(last1-first1). + * + * Swaps each element in the range @p [first1,last1) with the + * corresponding element in the range @p [first2,(last1-first1)). + * The ranges must not overlap. + */ + template<typename _ForwardIterator1, typename _ForwardIterator2> + _ForwardIterator2 + swap_ranges(_ForwardIterator1 __first1, _ForwardIterator1 __last1, + _ForwardIterator2 __first2) + { + // concept requirements + __glibcxx_function_requires(_Mutable_ForwardIteratorConcept< + _ForwardIterator1>) + __glibcxx_function_requires(_Mutable_ForwardIteratorConcept< + _ForwardIterator2>) + __glibcxx_requires_valid_range(__first1, __last1); + + for (; __first1 != __last1; ++__first1, ++__first2) + std::iter_swap(__first1, __first2); + return __first2; + } + + /** + * @brief This does what you think it does. + * @ingroup sorting_algorithms + * @param a A thing of arbitrary type. + * @param b Another thing of arbitrary type. + * @return The lesser of the parameters. + * + * This is the simple classic generic implementation. It will work on + * temporary expressions, since they are only evaluated once, unlike a + * preprocessor macro. + */ + template<typename _Tp> + inline const _Tp& + min(const _Tp& __a, const _Tp& __b) + { + // concept requirements + __glibcxx_function_requires(_LessThanComparableConcept<_Tp>) + //return __b < __a ? __b : __a; + if (__b < __a) + return __b; + return __a; + } + + /** + * @brief This does what you think it does. + * @ingroup sorting_algorithms + * @param a A thing of arbitrary type. + * @param b Another thing of arbitrary type. + * @return The greater of the parameters. + * + * This is the simple classic generic implementation. It will work on + * temporary expressions, since they are only evaluated once, unlike a + * preprocessor macro. + */ + template<typename _Tp> + inline const _Tp& + max(const _Tp& __a, const _Tp& __b) + { + // concept requirements + __glibcxx_function_requires(_LessThanComparableConcept<_Tp>) + //return __a < __b ? __b : __a; + if (__a < __b) + return __b; + return __a; + } + + /** + * @brief This does what you think it does. + * @ingroup sorting_algorithms + * @param a A thing of arbitrary type. + * @param b Another thing of arbitrary type. + * @param comp A @link comparison_functors comparison functor@endlink. + * @return The lesser of the parameters. + * + * This will work on temporary expressions, since they are only evaluated + * once, unlike a preprocessor macro. + */ + template<typename _Tp, typename _Compare> + inline const _Tp& + min(const _Tp& __a, const _Tp& __b, _Compare __comp) + { + //return __comp(__b, __a) ? __b : __a; + if (__comp(__b, __a)) + return __b; + return __a; + } + + /** + * @brief This does what you think it does. + * @ingroup sorting_algorithms + * @param a A thing of arbitrary type. + * @param b Another thing of arbitrary type. + * @param comp A @link comparison_functors comparison functor@endlink. + * @return The greater of the parameters. + * + * This will work on temporary expressions, since they are only evaluated + * once, unlike a preprocessor macro. + */ + template<typename _Tp, typename _Compare> + inline const _Tp& + max(const _Tp& __a, const _Tp& __b, _Compare __comp) + { + //return __comp(__a, __b) ? __b : __a; + if (__comp(__a, __b)) + return __b; + return __a; + } + + + // If _Iterator is a __normal_iterator return its base (a plain pointer, + // normally) otherwise return it untouched. See copy, fill, ... + template<typename _Iterator, + bool _IsNormal = __is_normal_iterator<_Iterator>::__value> + struct __niter_base + { + static _Iterator + __b(_Iterator __it) + { return __it; } + }; + + template<typename _Iterator> + struct __niter_base<_Iterator, true> + { + static typename _Iterator::iterator_type + __b(_Iterator __it) + { return __it.base(); } + }; + + // Likewise, for move_iterator. + template<typename _Iterator, + bool _IsMove = __is_move_iterator<_Iterator>::__value> + struct __miter_base + { + static _Iterator + __b(_Iterator __it) + { return __it; } + }; + + template<typename _Iterator> + struct __miter_base<_Iterator, true> + { + static typename _Iterator::iterator_type + __b(_Iterator __it) + { return __it.base(); } + }; + + // All of these auxiliary structs serve two purposes. (1) Replace + // calls to copy with memmove whenever possible. (Memmove, not memcpy, + // because the input and output ranges are permitted to overlap.) + // (2) If we're using random access iterators, then write the loop as + // a for loop with an explicit count. + + template<bool, bool, typename> + struct __copy_move + { + template<typename _II, typename _OI> + static _OI + __copy_m(_II __first, _II __last, _OI __result) + { + for (; __first != __last; ++__result, ++__first) + *__result = *__first; + return __result; + } + }; + +#ifdef __GXX_EXPERIMENTAL_CXX0X__ + template<typename _Category> + struct __copy_move<true, false, _Category> + { + template<typename _II, typename _OI> + static _OI + __copy_m(_II __first, _II __last, _OI __result) + { + for (; __first != __last; ++__result, ++__first) + *__result = std::move(*__first); + return __result; + } + }; +#endif + + template<> + struct __copy_move<false, false, random_access_iterator_tag> + { + template<typename _II, typename _OI> + static _OI + __copy_m(_II __first, _II __last, _OI __result) + { + typedef typename iterator_traits<_II>::difference_type _Distance; + for(_Distance __n = __last - __first; __n > 0; --__n) + { + *__result = *__first; + ++__first; + ++__result; + } + return __result; + } + }; + +#ifdef __GXX_EXPERIMENTAL_CXX0X__ + template<> + struct __copy_move<true, false, random_access_iterator_tag> + { + template<typename _II, typename _OI> + static _OI + __copy_m(_II __first, _II __last, _OI __result) + { + typedef typename iterator_traits<_II>::difference_type _Distance; + for(_Distance __n = __last - __first; __n > 0; --__n) + { + *__result = std::move(*__first); + ++__first; + ++__result; + } + return __result; + } + }; +#endif + + template<bool _IsMove> + struct __copy_move<_IsMove, true, random_access_iterator_tag> + { + template<typename _Tp> + static _Tp* + __copy_m(const _Tp* __first, const _Tp* __last, _Tp* __result) + { + __builtin_memmove(__result, __first, + sizeof(_Tp) * (__last - __first)); + return __result + (__last - __first); + } + }; + + template<bool _IsMove, typename _II, typename _OI> + inline _OI + __copy_move_a(_II __first, _II __last, _OI __result) + { + typedef typename iterator_traits<_II>::value_type _ValueTypeI; + typedef typename iterator_traits<_OI>::value_type _ValueTypeO; + typedef typename iterator_traits<_II>::iterator_category _Category; + const bool __simple = (__is_pod(_ValueTypeI) + && __is_pointer<_II>::__value + && __is_pointer<_OI>::__value + && __are_same<_ValueTypeI, _ValueTypeO>::__value); + + return std::__copy_move<_IsMove, __simple, + _Category>::__copy_m(__first, __last, __result); + } + + // Helpers for streambuf iterators (either istream or ostream). + // NB: avoid including <iosfwd>, relatively large. + template<typename _CharT> + struct char_traits; + + template<typename _CharT, typename _Traits> + class istreambuf_iterator; + + template<typename _CharT, typename _Traits> + class ostreambuf_iterator; + + template<bool _IsMove, typename _CharT> + typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value, + ostreambuf_iterator<_CharT, char_traits<_CharT> > >::__type + __copy_move_a2(_CharT*, _CharT*, + ostreambuf_iterator<_CharT, char_traits<_CharT> >); + + template<bool _IsMove, typename _CharT> + typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value, + ostreambuf_iterator<_CharT, char_traits<_CharT> > >::__type + __copy_move_a2(const _CharT*, const _CharT*, + ostreambuf_iterator<_CharT, char_traits<_CharT> >); + + template<bool _IsMove, typename _CharT> + typename __gnu_cxx::__enable_if<__is_char<_CharT>::__value, + _CharT*>::__type + __copy_move_a2(istreambuf_iterator<_CharT, char_traits<_CharT> >, + istreambuf_iterator<_CharT, char_traits<_CharT> >, _CharT*); + + template<bool _IsMove, typename _II, typename _OI> + inline _OI + __copy_move_a2(_II __first, _II __last, _OI __result) + { + return _OI(std::__copy_move_a<_IsMove> + (std::__niter_base<_II>::__b(__first), + std::__niter_base<_II>::__b(__last), + std::__niter_base<_OI>::__b(__result))); + } + + /** + * @brief Copies the range [first,last) into result. + * @ingroup mutating_algorithms + * @param first An input iterator. + * @param last An input iterator. + * @param result An output iterator. + * @return result + (first - last) + * + * This inline function will boil down to a call to @c memmove whenever + * possible. Failing that, if random access iterators are passed, then the + * loop count will be known (and therefore a candidate for compiler + * optimizations such as unrolling). Result may not be contained within + * [first,last); the copy_backward function should be used instead. + * + * Note that the end of the output range is permitted to be contained + * within [first,last). + */ + template<typename _II, typename _OI> + inline _OI + copy(_II __first, _II __last, _OI __result) + { + // concept requirements + __glibcxx_function_requires(_InputIteratorConcept<_II>) + __glibcxx_function_requires(_OutputIteratorConcept<_OI, + typename iterator_traits<_II>::value_type>) + __glibcxx_requires_valid_range(__first, __last); + + return (std::__copy_move_a2<__is_move_iterator<_II>::__value> + (std::__miter_base<_II>::__b(__first), + std::__miter_base<_II>::__b(__last), __result)); + } + +#ifdef __GXX_EXPERIMENTAL_CXX0X__ + /** + * @brief Moves the range [first,last) into result. + * @ingroup mutating_algorithms + * @param first An input iterator. + * @param last An input iterator. + * @param result An output iterator. + * @return result + (first - last) + * + * This inline function will boil down to a call to @c memmove whenever + * possible. Failing that, if random access iterators are passed, then the + * loop count will be known (and therefore a candidate for compiler + * optimizations such as unrolling). Result may not be contained within + * [first,last); the move_backward function should be used instead. + * + * Note that the end of the output range is permitted to be contained + * within [first,last). + */ + template<typename _II, typename _OI> + inline _OI + move(_II __first, _II __last, _OI __result) + { + // concept requirements + __glibcxx_function_requires(_InputIteratorConcept<_II>) + __glibcxx_function_requires(_OutputIteratorConcept<_OI, + typename iterator_traits<_II>::value_type>) + __glibcxx_requires_valid_range(__first, __last); + + return (std::__copy_move_a2<true> + (std::__miter_base<_II>::__b(__first), + std::__miter_base<_II>::__b(__last), __result)); + } + +#define _GLIBCXX_MOVE3(_Tp, _Up, _Vp) std::move(_Tp, _Up, _Vp) +#else +#define _GLIBCXX_MOVE3(_Tp, _Up, _Vp) std::copy(_Tp, _Up, _Vp) +#endif + + template<bool, bool, typename> + struct __copy_move_backward + { + template<typename _BI1, typename _BI2> + static _BI2 + __copy_move_b(_BI1 __first, _BI1 __last, _BI2 __result) + { + while (__first != __last) + *--__result = *--__last; + return __result; + } + }; + +#ifdef __GXX_EXPERIMENTAL_CXX0X__ + template<typename _Category> + struct __copy_move_backward<true, false, _Category> + { + template<typename _BI1, typename _BI2> + static _BI2 + __copy_move_b(_BI1 __first, _BI1 __last, _BI2 __result) + { + while (__first != __last) + *--__result = std::move(*--__last); + return __result; + } + }; +#endif + + template<> + struct __copy_move_backward<false, false, random_access_iterator_tag> + { + template<typename _BI1, typename _BI2> + static _BI2 + __copy_move_b(_BI1 __first, _BI1 __last, _BI2 __result) + { + typename iterator_traits<_BI1>::difference_type __n; + for (__n = __last - __first; __n > 0; --__n) + *--__result = *--__last; + return __result; + } + }; + +#ifdef __GXX_EXPERIMENTAL_CXX0X__ + template<> + struct __copy_move_backward<true, false, random_access_iterator_tag> + { + template<typename _BI1, typename _BI2> + static _BI2 + __copy_move_b(_BI1 __first, _BI1 __last, _BI2 __result) + { + typename iterator_traits<_BI1>::difference_type __n; + for (__n = __last - __first; __n > 0; --__n) + *--__result = std::move(*--__last); + return __result; + } + }; +#endif + + template<bool _IsMove> + struct __copy_move_backward<_IsMove, true, random_access_iterator_tag> + { + template<typename _Tp> + static _Tp* + __copy_move_b(const _Tp* __first, const _Tp* __last, _Tp* __result) + { + const ptrdiff_t _Num = __last - __first; + __builtin_memmove(__result - _Num, __first, sizeof(_Tp) * _Num); + return __result - _Num; + } + }; + + template<bool _IsMove, typename _BI1, typename _BI2> + inline _BI2 + __copy_move_backward_a(_BI1 __first, _BI1 __last, _BI2 __result) + { + typedef typename iterator_traits<_BI1>::value_type _ValueType1; + typedef typename iterator_traits<_BI2>::value_type _ValueType2; + typedef typename iterator_traits<_BI1>::iterator_category _Category; + const bool __simple = (__is_pod(_ValueType1) + && __is_pointer<_BI1>::__value + && __is_pointer<_BI2>::__value + && __are_same<_ValueType1, _ValueType2>::__value); + + return std::__copy_move_backward<_IsMove, __simple, + _Category>::__copy_move_b(__first, + __last, + __result); + } + + template<bool _IsMove, typename _BI1, typename _BI2> + inline _BI2 + __copy_move_backward_a2(_BI1 __first, _BI1 __last, _BI2 __result) + { + return _BI2(std::__copy_move_backward_a<_IsMove> + (std::__niter_base<_BI1>::__b(__first), + std::__niter_base<_BI1>::__b(__last), + std::__niter_base<_BI2>::__b(__result))); + } + + /** + * @brief Copies the range [first,last) into result. + * @ingroup mutating_algorithms + * @param first A bidirectional iterator. + * @param last A bidirectional iterator. + * @param result A bidirectional iterator. + * @return result - (first - last) + * + * The function has the same effect as copy, but starts at the end of the + * range and works its way to the start, returning the start of the result. + * This inline function will boil down to a call to @c memmove whenever + * possible. Failing that, if random access iterators are passed, then the + * loop count will be known (and therefore a candidate for compiler + * optimizations such as unrolling). + * + * Result may not be in the range [first,last). Use copy instead. Note + * that the start of the output range may overlap [first,last). + */ + template<typename _BI1, typename _BI2> + inline _BI2 + copy_backward(_BI1 __first, _BI1 __last, _BI2 __result) + { + // concept requirements + __glibcxx_function_requires(_BidirectionalIteratorConcept<_BI1>) + __glibcxx_function_requires(_Mutable_BidirectionalIteratorConcept<_BI2>) + __glibcxx_function_requires(_ConvertibleConcept< + typename iterator_traits<_BI1>::value_type, + typename iterator_traits<_BI2>::value_type>) + __glibcxx_requires_valid_range(__first, __last); + + return (std::__copy_move_backward_a2<__is_move_iterator<_BI1>::__value> + (std::__miter_base<_BI1>::__b(__first), + std::__miter_base<_BI1>::__b(__last), __result)); + } + +#ifdef __GXX_EXPERIMENTAL_CXX0X__ + /** + * @brief Moves the range [first,last) into result. + * @ingroup mutating_algorithms + * @param first A bidirectional iterator. + * @param last A bidirectional iterator. + * @param result A bidirectional iterator. + * @return result - (first - last) + * + * The function has the same effect as move, but starts at the end of the + * range and works its way to the start, returning the start of the result. + * This inline function will boil down to a call to @c memmove whenever + * possible. Failing that, if random access iterators are passed, then the + * loop count will be known (and therefore a candidate for compiler + * optimizations such as unrolling). + * + * Result may not be in the range [first,last). Use move instead. Note + * that the start of the output range may overlap [first,last). + */ + template<typename _BI1, typename _BI2> + inline _BI2 + move_backward(_BI1 __first, _BI1 __last, _BI2 __result) + { + // concept requirements + __glibcxx_function_requires(_BidirectionalIteratorConcept<_BI1>) + __glibcxx_function_requires(_Mutable_BidirectionalIteratorConcept<_BI2>) + __glibcxx_function_requires(_ConvertibleConcept< + typename iterator_traits<_BI1>::value_type, + typename iterator_traits<_BI2>::value_type>) + __glibcxx_requires_valid_range(__first, __last); + + return (std::__copy_move_backward_a2<true> + (std::__miter_base<_BI1>::__b(__first), + std::__miter_base<_BI1>::__b(__last), __result)); + } + +#define _GLIBCXX_MOVE_BACKWARD3(_Tp, _Up, _Vp) std::move_backward(_Tp, _Up, _Vp) +#else +#define _GLIBCXX_MOVE_BACKWARD3(_Tp, _Up, _Vp) std::copy_backward(_Tp, _Up, _Vp) +#endif + + template<typename _ForwardIterator, typename _Tp> + inline typename + __gnu_cxx::__enable_if<!__is_scalar<_Tp>::__value, void>::__type + __fill_a(_ForwardIterator __first, _ForwardIterator __last, + const _Tp& __value) + { + for (; __first != __last; ++__first) + *__first = __value; + } + + template<typename _ForwardIterator, typename _Tp> + inline typename + __gnu_cxx::__enable_if<__is_scalar<_Tp>::__value, void>::__type + __fill_a(_ForwardIterator __first, _ForwardIterator __last, + const _Tp& __value) + { + const _Tp __tmp = __value; + for (; __first != __last; ++__first) + *__first = __tmp; + } + + // Specialization: for char types we can use memset. + template<typename _Tp> + inline typename + __gnu_cxx::__enable_if<__is_byte<_Tp>::__value, void>::__type + __fill_a(_Tp* __first, _Tp* __last, const _Tp& __c) + { + const _Tp __tmp = __c; + __builtin_memset(__first, static_cast<unsigned char>(__tmp), + __last - __first); + } + + /** + * @brief Fills the range [first,last) with copies of value. + * @ingroup mutating_algorithms + * @param first A forward iterator. + * @param last A forward iterator. + * @param value A reference-to-const of arbitrary type. + * @return Nothing. + * + * This function fills a range with copies of the same value. For char + * types filling contiguous areas of memory, this becomes an inline call + * to @c memset or @c wmemset. + */ + template<typename _ForwardIterator, typename _Tp> + inline void + fill(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value) + { + // concept requirements + __glibcxx_function_requires(_Mutable_ForwardIteratorConcept< + _ForwardIterator>) + __glibcxx_requires_valid_range(__first, __last); + + std::__fill_a(std::__niter_base<_ForwardIterator>::__b(__first), + std::__niter_base<_ForwardIterator>::__b(__last), __value); + } + + template<typename _OutputIterator, typename _Size, typename _Tp> + inline typename + __gnu_cxx::__enable_if<!__is_scalar<_Tp>::__value, _OutputIterator>::__type + __fill_n_a(_OutputIterator __first, _Size __n, const _Tp& __value) + { + for (; __n > 0; --__n, ++__first) + *__first = __value; + return __first; + } + + template<typename _OutputIterator, typename _Size, typename _Tp> + inline typename + __gnu_cxx::__enable_if<__is_scalar<_Tp>::__value, _OutputIterator>::__type + __fill_n_a(_OutputIterator __first, _Size __n, const _Tp& __value) + { + const _Tp __tmp = __value; + for (; __n > 0; --__n, ++__first) + *__first = __tmp; + return __first; + } + + template<typename _Size, typename _Tp> + inline typename + __gnu_cxx::__enable_if<__is_byte<_Tp>::__value, _Tp*>::__type + __fill_n_a(_Tp* __first, _Size __n, const _Tp& __c) + { + std::__fill_a(__first, __first + __n, __c); + return __first + __n; + } + + /** + * @brief Fills the range [first,first+n) with copies of value. + * @ingroup mutating_algorithms + * @param first An output iterator. + * @param n The count of copies to perform. + * @param value A reference-to-const of arbitrary type. + * @return The iterator at first+n. + * + * This function fills a range with copies of the same value. For char + * types filling contiguous areas of memory, this becomes an inline call + * to @c memset or @ wmemset. + */ + template<typename _OI, typename _Size, typename _Tp> + inline _OI + fill_n(_OI __first, _Size __n, const _Tp& __value) + { + // concept requirements + __glibcxx_function_requires(_OutputIteratorConcept<_OI, _Tp>) + + return _OI(std::__fill_n_a(std::__niter_base<_OI>::__b(__first), + __n, __value)); + } + + template<bool _BoolType> + struct __equal + { + template<typename _II1, typename _II2> + static bool + equal(_II1 __first1, _II1 __last1, _II2 __first2) + { + for (; __first1 != __last1; ++__first1, ++__first2) + if (!(*__first1 == *__first2)) + return false; + return true; + } + }; + + template<> + struct __equal<true> + { + template<typename _Tp> + static bool + equal(const _Tp* __first1, const _Tp* __last1, const _Tp* __first2) + { + return !__builtin_memcmp(__first1, __first2, sizeof(_Tp) + * (__last1 - __first1)); + } + }; + + template<typename _II1, typename _II2> + inline bool + __equal_aux(_II1 __first1, _II1 __last1, _II2 __first2) + { + typedef typename iterator_traits<_II1>::value_type _ValueType1; + typedef typename iterator_traits<_II2>::value_type _ValueType2; + const bool __simple = (__is_integer<_ValueType1>::__value + && __is_pointer<_II1>::__value + && __is_pointer<_II2>::__value + && __are_same<_ValueType1, _ValueType2>::__value); + + return std::__equal<__simple>::equal(__first1, __last1, __first2); + } + + + template<typename, typename> + struct __lc_rai + { + template<typename _II1, typename _II2> + static _II1 + __newlast1(_II1, _II1 __last1, _II2, _II2) + { return __last1; } + + template<typename _II> + static bool + __cnd2(_II __first, _II __last) + { return __first != __last; } + }; + + template<> + struct __lc_rai<random_access_iterator_tag, random_access_iterator_tag> + { + template<typename _RAI1, typename _RAI2> + static _RAI1 + __newlast1(_RAI1 __first1, _RAI1 __last1, + _RAI2 __first2, _RAI2 __last2) + { + const typename iterator_traits<_RAI1>::difference_type + __diff1 = __last1 - __first1; + const typename iterator_traits<_RAI2>::difference_type + __diff2 = __last2 - __first2; + return __diff2 < __diff1 ? __first1 + __diff2 : __last1; + } + + template<typename _RAI> + static bool + __cnd2(_RAI, _RAI) + { return true; } + }; + + template<bool _BoolType> + struct __lexicographical_compare + { + template<typename _II1, typename _II2> + static bool __lc(_II1, _II1, _II2, _II2); + }; + + template<bool _BoolType> + template<typename _II1, typename _II2> + bool + __lexicographical_compare<_BoolType>:: + __lc(_II1 __first1, _II1 __last1, _II2 __first2, _II2 __last2) + { + typedef typename iterator_traits<_II1>::iterator_category _Category1; + typedef typename iterator_traits<_II2>::iterator_category _Category2; + typedef std::__lc_rai<_Category1, _Category2> __rai_type; + + __last1 = __rai_type::__newlast1(__first1, __last1, + __first2, __last2); + for (; __first1 != __last1 && __rai_type::__cnd2(__first2, __last2); + ++__first1, ++__first2) + { + if (*__first1 < *__first2) + return true; + if (*__first2 < *__first1) + return false; + } + return __first1 == __last1 && __first2 != __last2; + } + + template<> + struct __lexicographical_compare<true> + { + template<typename _Tp, typename _Up> + static bool + __lc(const _Tp* __first1, const _Tp* __last1, + const _Up* __first2, const _Up* __last2) + { + const size_t __len1 = __last1 - __first1; + const size_t __len2 = __last2 - __first2; + const int __result = __builtin_memcmp(__first1, __first2, + std::min(__len1, __len2)); + return __result != 0 ? __result < 0 : __len1 < __len2; + } + }; + + template<typename _II1, typename _II2> + inline bool + __lexicographical_compare_aux(_II1 __first1, _II1 __last1, + _II2 __first2, _II2 __last2) + { + typedef typename iterator_traits<_II1>::value_type _ValueType1; + typedef typename iterator_traits<_II2>::value_type _ValueType2; + const bool __simple = + (__is_byte<_ValueType1>::__value && __is_byte<_ValueType2>::__value + && !__gnu_cxx::__numeric_traits<_ValueType1>::__is_signed + && !__gnu_cxx::__numeric_traits<_ValueType2>::__is_signed + && __is_pointer<_II1>::__value + && __is_pointer<_II2>::__value); + + return std::__lexicographical_compare<__simple>::__lc(__first1, __last1, + __first2, __last2); + } + +_GLIBCXX_END_NAMESPACE + +_GLIBCXX_BEGIN_NESTED_NAMESPACE(std, _GLIBCXX_STD_P) + + /** + * @brief Tests a range for element-wise equality. + * @ingroup non_mutating_algorithms + * @param first1 An input iterator. + * @param last1 An input iterator. + * @param first2 An input iterator. + * @return A boolean true or false. + * + * This compares the elements of two ranges using @c == and returns true or + * false depending on whether all of the corresponding elements of the + * ranges are equal. + */ + template<typename _II1, typename _II2> + inline bool + equal(_II1 __first1, _II1 __last1, _II2 __first2) + { + // concept requirements + __glibcxx_function_requires(_InputIteratorConcept<_II1>) + __glibcxx_function_requires(_InputIteratorConcept<_II2>) + __glibcxx_function_requires(_EqualOpConcept< + typename iterator_traits<_II1>::value_type, + typename iterator_traits<_II2>::value_type>) + __glibcxx_requires_valid_range(__first1, __last1); + + return std::__equal_aux(std::__niter_base<_II1>::__b(__first1), + std::__niter_base<_II1>::__b(__last1), + std::__niter_base<_II2>::__b(__first2)); + } + + /** + * @brief Tests a range for element-wise equality. + * @ingroup non_mutating_algorithms + * @param first1 An input iterator. + * @param last1 An input iterator. + * @param first2 An input iterator. + * @param binary_pred A binary predicate @link functors + * functor@endlink. + * @return A boolean true or false. + * + * This compares the elements of two ranges using the binary_pred + * parameter, and returns true or + * false depending on whether all of the corresponding elements of the + * ranges are equal. + */ + template<typename _IIter1, typename _IIter2, typename _BinaryPredicate> + inline bool + equal(_IIter1 __first1, _IIter1 __last1, + _IIter2 __first2, _BinaryPredicate __binary_pred) + { + // concept requirements + __glibcxx_function_requires(_InputIteratorConcept<_IIter1>) + __glibcxx_function_requires(_InputIteratorConcept<_IIter2>) + __glibcxx_requires_valid_range(__first1, __last1); + + for (; __first1 != __last1; ++__first1, ++__first2) + if (!bool(__binary_pred(*__first1, *__first2))) + return false; + return true; + } + + /** + * @brief Performs "dictionary" comparison on ranges. + * @ingroup sorting_algorithms + * @param first1 An input iterator. + * @param last1 An input iterator. + * @param first2 An input iterator. + * @param last2 An input iterator. + * @return A boolean true or false. + * + * "Returns true if the sequence of elements defined by the range + * [first1,last1) is lexicographically less than the sequence of elements + * defined by the range [first2,last2). Returns false otherwise." + * (Quoted from [25.3.8]/1.) If the iterators are all character pointers, + * then this is an inline call to @c memcmp. + */ + template<typename _II1, typename _II2> + inline bool + lexicographical_compare(_II1 __first1, _II1 __last1, + _II2 __first2, _II2 __last2) + { + // concept requirements + typedef typename iterator_traits<_II1>::value_type _ValueType1; + typedef typename iterator_traits<_II2>::value_type _ValueType2; + __glibcxx_function_requires(_InputIteratorConcept<_II1>) + __glibcxx_function_requires(_InputIteratorConcept<_II2>) + __glibcxx_function_requires(_LessThanOpConcept<_ValueType1, _ValueType2>) + __glibcxx_function_requires(_LessThanOpConcept<_ValueType2, _ValueType1>) + __glibcxx_requires_valid_range(__first1, __last1); + __glibcxx_requires_valid_range(__first2, __last2); + + return std::__lexicographical_compare_aux + (std::__niter_base<_II1>::__b(__first1), + std::__niter_base<_II1>::__b(__last1), + std::__niter_base<_II2>::__b(__first2), + std::__niter_base<_II2>::__b(__last2)); + } + + /** + * @brief Performs "dictionary" comparison on ranges. + * @ingroup sorting_algorithms + * @param first1 An input iterator. + * @param last1 An input iterator. + * @param first2 An input iterator. + * @param last2 An input iterator. + * @param comp A @link comparison_functors comparison functor@endlink. + * @return A boolean true or false. + * + * The same as the four-parameter @c lexicographical_compare, but uses the + * comp parameter instead of @c <. + */ + template<typename _II1, typename _II2, typename _Compare> + bool + lexicographical_compare(_II1 __first1, _II1 __last1, + _II2 __first2, _II2 __last2, _Compare __comp) + { + typedef typename iterator_traits<_II1>::iterator_category _Category1; + typedef typename iterator_traits<_II2>::iterator_category _Category2; + typedef std::__lc_rai<_Category1, _Category2> __rai_type; + + // concept requirements + __glibcxx_function_requires(_InputIteratorConcept<_II1>) + __glibcxx_function_requires(_InputIteratorConcept<_II2>) + __glibcxx_requires_valid_range(__first1, __last1); + __glibcxx_requires_valid_range(__first2, __last2); + + __last1 = __rai_type::__newlast1(__first1, __last1, __first2, __last2); + for (; __first1 != __last1 && __rai_type::__cnd2(__first2, __last2); + ++__first1, ++__first2) + { + if (__comp(*__first1, *__first2)) + return true; + if (__comp(*__first2, *__first1)) + return false; + } + return __first1 == __last1 && __first2 != __last2; + } + + /** + * @brief Finds the places in ranges which don't match. + * @ingroup non_mutating_algorithms + * @param first1 An input iterator. + * @param last1 An input iterator. + * @param first2 An input iterator. + * @return A pair of iterators pointing to the first mismatch. + * + * This compares the elements of two ranges using @c == and returns a pair + * of iterators. The first iterator points into the first range, the + * second iterator points into the second range, and the elements pointed + * to by the iterators are not equal. + */ + template<typename _InputIterator1, typename _InputIterator2> + pair<_InputIterator1, _InputIterator2> + mismatch(_InputIterator1 __first1, _InputIterator1 __last1, + _InputIterator2 __first2) + { + // concept requirements + __glibcxx_function_requires(_InputIteratorConcept<_InputIterator1>) + __glibcxx_function_requires(_InputIteratorConcept<_InputIterator2>) + __glibcxx_function_requires(_EqualOpConcept< + typename iterator_traits<_InputIterator1>::value_type, + typename iterator_traits<_InputIterator2>::value_type>) + __glibcxx_requires_valid_range(__first1, __last1); + + while (__first1 != __last1 && *__first1 == *__first2) + { + ++__first1; + ++__first2; + } + return pair<_InputIterator1, _InputIterator2>(__first1, __first2); + } + + /** + * @brief Finds the places in ranges which don't match. + * @ingroup non_mutating_algorithms + * @param first1 An input iterator. + * @param last1 An input iterator. + * @param first2 An input iterator. + * @param binary_pred A binary predicate @link functors + * functor@endlink. + * @return A pair of iterators pointing to the first mismatch. + * + * This compares the elements of two ranges using the binary_pred + * parameter, and returns a pair + * of iterators. The first iterator points into the first range, the + * second iterator points into the second range, and the elements pointed + * to by the iterators are not equal. + */ + template<typename _InputIterator1, typename _InputIterator2, + typename _BinaryPredicate> + pair<_InputIterator1, _InputIterator2> + mismatch(_InputIterator1 __first1, _InputIterator1 __last1, + _InputIterator2 __first2, _BinaryPredicate __binary_pred) + { + // concept requirements + __glibcxx_function_requires(_InputIteratorConcept<_InputIterator1>) + __glibcxx_function_requires(_InputIteratorConcept<_InputIterator2>) + __glibcxx_requires_valid_range(__first1, __last1); + + while (__first1 != __last1 && bool(__binary_pred(*__first1, *__first2))) + { + ++__first1; + ++__first2; + } + return pair<_InputIterator1, _InputIterator2>(__first1, __first2); + } + +_GLIBCXX_END_NESTED_NAMESPACE + +// NB: This file is included within many other C++ includes, as a way +// of getting the base algorithms. So, make sure that parallel bits +// come in too if requested. +#ifdef _GLIBCXX_PARALLEL +# include <parallel/algobase.h> +#endif + +#endif |