464 lines
17 KiB
C++
464 lines
17 KiB
C++
/*
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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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* Copyright (c) 1996-1998
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* Silicon Graphics Computer Systems, Inc.
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*
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* Copyright (c) 1997
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* Moscow Center for SPARC Technology
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*
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* Copyright (c) 1999
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* Boris Fomitchev
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*
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* This material is provided "as is", with absolutely no warranty expressed
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* or implied. Any use is at your own risk.
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*
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* Permission to use or copy this software for any purpose is hereby granted
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* without fee, provided the above notices are retained on all copies.
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* Permission to modify the code and to distribute modified code is granted,
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* provided the above notices are retained, and a notice that the code was
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* modified is included with the above copyright notice.
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*
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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 _STLP_INTERNAL_ITERATOR_BASE_H
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#define _STLP_INTERNAL_ITERATOR_BASE_H
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#ifndef _STLP_CSTDDEF
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# include <cstddef>
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#endif
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# if defined (_STLP_IMPORT_VENDOR_CSTD) && ! defined (_STLP_VENDOR_GLOBAL_CSTD)
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_STLP_BEGIN_NAMESPACE
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using namespace _STLP_VENDOR_CSTD;
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_STLP_END_NAMESPACE
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#endif /* _STLP_IMPORT_VENDOR_CSTD */
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#ifndef __TYPE_TRAITS_H
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# include <stl/type_traits.h>
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#endif
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_STLP_BEGIN_NAMESPACE
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struct input_iterator_tag {};
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struct output_iterator_tag {};
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struct forward_iterator_tag : public input_iterator_tag {};
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struct bidirectional_iterator_tag : public forward_iterator_tag {};
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struct random_access_iterator_tag : public bidirectional_iterator_tag {};
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template <class _Category, class _Tp, __DFL_TMPL_PARAM(_Distance,ptrdiff_t),
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__DFL_TMPL_PARAM(_Pointer,_Tp*), __DFL_TMPL_PARAM(_Reference,_Tp&) >
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struct iterator {
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typedef _Category iterator_category;
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typedef _Tp value_type;
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typedef _Distance difference_type;
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typedef _Pointer pointer;
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typedef _Reference reference;
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};
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_STLP_TEMPLATE_NULL
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struct iterator<output_iterator_tag, void, void, void, void> {
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typedef output_iterator_tag iterator_category;
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#ifdef _STLP_CLASS_PARTIAL_SPECIALIZATION
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typedef void value_type;
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typedef void difference_type;
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typedef void pointer;
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typedef void reference;
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#endif
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};
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# ifdef _STLP_USE_OLD_HP_ITERATOR_QUERIES
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# define _STLP_ITERATOR_CATEGORY(_It, _Tp) iterator_category(_It)
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# define _STLP_DISTANCE_TYPE(_It, _Tp) distance_type(_It)
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# define _STLP_VALUE_TYPE(_It, _Tp) value_type(_It)
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# else
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# ifdef _STLP_CLASS_PARTIAL_SPECIALIZATION
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# define _STLP_VALUE_TYPE(_It, _Tp) (typename iterator_traits< _Tp >::value_type*)0
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# define _STLP_DISTANCE_TYPE(_It, _Tp) (typename iterator_traits< _Tp >::difference_type*)0
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# if defined (__BORLANDC__) || defined (__SUNPRO_CC) || ( defined (__MWERKS__) && (__MWERKS__ <= 0x2303)) || ( defined (__sgi) && defined (_COMPILER_VERSION)) || defined (__DMC__)
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# define _STLP_ITERATOR_CATEGORY(_It, _Tp) iterator_traits< _Tp >::iterator_category()
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# else
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# define _STLP_ITERATOR_CATEGORY(_It, _Tp) typename iterator_traits< _Tp >::iterator_category()
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# endif
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# else
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# define _STLP_ITERATOR_CATEGORY(_It, _Tp) __iterator_category(_It, _IsPtrType<_Tp>::_Ret())
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# define _STLP_DISTANCE_TYPE(_It, _Tp) (ptrdiff_t*)0
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# define _STLP_VALUE_TYPE(_It, _Tp) __value_type(_It, _IsPtrType<_Tp>::_Ret() )
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# endif
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# endif
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template <class _Iterator>
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struct iterator_traits {
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typedef typename _Iterator::iterator_category iterator_category;
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typedef typename _Iterator::value_type value_type;
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typedef typename _Iterator::difference_type difference_type;
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typedef typename _Iterator::pointer pointer;
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typedef typename _Iterator::reference reference;
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};
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# if defined (_STLP_CLASS_PARTIAL_SPECIALIZATION) && ! defined (__SUNPRO_CC)
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# define _STLP_DIFFERENCE_TYPE(_Iterator) typename iterator_traits<_Iterator>::difference_type
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# else
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# define _STLP_DIFFERENCE_TYPE(_Iterator) ptrdiff_t
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# endif
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# ifdef _STLP_CLASS_PARTIAL_SPECIALIZATION
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// fbp : this order keeps gcc happy
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template <class _Tp>
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struct iterator_traits<const _Tp*> {
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typedef random_access_iterator_tag iterator_category;
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typedef _Tp value_type;
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typedef ptrdiff_t difference_type;
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typedef const _Tp* pointer;
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typedef const _Tp& reference;
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};
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template <class _Tp>
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struct iterator_traits<_Tp*> {
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typedef random_access_iterator_tag iterator_category;
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typedef _Tp value_type;
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typedef ptrdiff_t difference_type;
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typedef _Tp* pointer;
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typedef _Tp& reference;
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};
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# if defined (__BORLANDC__)
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template <class _Tp>
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struct iterator_traits<_Tp* const> {
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typedef random_access_iterator_tag iterator_category;
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typedef _Tp value_type;
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typedef ptrdiff_t difference_type;
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typedef const _Tp* pointer;
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typedef const _Tp& reference;
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};
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# endif
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# endif /* _STLP_CLASS_PARTIAL_SPECIALIZATION */
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# if defined (_STLP_CLASS_PARTIAL_SPECIALIZATION) \
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|| (defined (_STLP_SIMULATE_PARTIAL_SPEC_FOR_TYPE_TRAITS) && ! defined (_STLP_NO_ARROW_OPERATOR))
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# define _STLP_POINTERS_SPECIALIZE( _TpP )
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# define _STLP_DEFINE_ARROW_OPERATOR pointer operator->() const { return &(operator*()); }
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# else
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# include <stl/_ptrs_specialize.h>
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# endif
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# ifndef _STLP_USE_OLD_HP_ITERATOR_QUERIES
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// The overloaded functions iterator_category, distance_type, and
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// value_type are not part of the C++ standard. (They have been
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// replaced by struct iterator_traits.) They are included for
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// backward compatibility with the HP STL.
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// We introduce internal names for these functions.
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# ifdef _STLP_CLASS_PARTIAL_SPECIALIZATION
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template <class _Iter>
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inline typename iterator_traits<_Iter>::iterator_category __iterator_category(const _Iter&) {
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typedef typename iterator_traits<_Iter>::iterator_category _Category;
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return _Category();
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}
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template <class _Iter>
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inline typename iterator_traits<_Iter>::difference_type* __distance_type(const _Iter&) {
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typedef typename iterator_traits<_Iter>::difference_type _diff_type;
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return __STATIC_CAST(_diff_type*,0);
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}
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template <class _Iter>
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inline typename iterator_traits<_Iter>::value_type* __value_type(const _Iter&) {
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typedef typename iterator_traits<_Iter>::value_type _value_type;
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return __STATIC_CAST(_value_type*,0);
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}
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# else
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template <class _Iter>
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inline random_access_iterator_tag
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__iterator_category(const _Iter&, const __true_type&) {
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return random_access_iterator_tag();
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}
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template <class _Iter>
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inline _STLP_TYPENAME_ON_RETURN_TYPE iterator_traits<_Iter>::iterator_category
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__iterator_category(const _Iter&, const __false_type&) {
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typedef typename iterator_traits<_Iter>::iterator_category _Category;
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return _Category();
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}
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template <class _Iter>
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inline ptrdiff_t* _STLP_CALL __distance_type(const _Iter&) { return (ptrdiff_t*)(0); }
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template <class _Iter>
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inline _STLP_TYPENAME_ON_RETURN_TYPE iterator_traits<_Iter>::value_type*
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__value_type(const _Iter&, const __false_type&) {
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typedef typename iterator_traits<_Iter>::value_type _value_type;
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return __STATIC_CAST(_value_type*,0);
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}
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template <class _Tp>
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inline _Tp*
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__value_type(const _Tp*, const __true_type&) {
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return __STATIC_CAST(_Tp*, 0);
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}
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# endif
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#else /* old queries */
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template <class _Category, class _Tp, class _Distance, class _Pointer, class _Reference>
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inline _Category _STLP_CALL iterator_category(const iterator<_Category,_Tp,_Distance,_Pointer,_Reference>&) { return _Category(); }
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template <class _Category, class _Tp, class _Distance, class _Pointer, class _Reference>
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inline _Tp* _STLP_CALL value_type(const iterator<_Category,_Tp,_Distance,_Pointer,_Reference>&) { return (_Tp*)(0); }
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template <class _Category, class _Tp, class _Distance, class _Pointer, class _Reference>
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inline _Distance* _STLP_CALL distance_type(const iterator<_Category,_Tp,_Distance,_Pointer,_Reference>&) { return (_Distance*)(0); }
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template <class _Tp>
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inline random_access_iterator_tag _STLP_CALL iterator_category(const _Tp*) { return random_access_iterator_tag(); }
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template <class _Tp>
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inline _Tp* _STLP_CALL value_type(const _Tp*) { return (_Tp*)(0); }
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template <class _Tp>
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inline ptrdiff_t* _STLP_CALL distance_type(const _Tp*) { return (ptrdiff_t*)(0); }
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#endif /* _STLP_USE_OLD_HP_ITERATOR_QUERIES */
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# if ! defined (_STLP_NO_ANACHRONISMS)
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// The base classes input_iterator, output_iterator, forward_iterator,
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// bidirectional_iterator, and random_access_iterator are not part of
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// the C++ standard. (They have been replaced by struct iterator.)
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// They are included for backward compatibility with the HP STL.
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template <class _Tp, class _Distance> struct input_iterator :
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public iterator <input_iterator_tag, _Tp, _Distance, _Tp*, _Tp&> {};
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struct output_iterator : public iterator <output_iterator_tag, void, void, void, void> {};
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template <class _Tp, class _Distance> struct forward_iterator :
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public iterator<forward_iterator_tag, _Tp, _Distance, _Tp*, _Tp&> {};
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template <class _Tp, class _Distance> struct bidirectional_iterator :
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public iterator<bidirectional_iterator_tag, _Tp, _Distance, _Tp*, _Tp&> {};
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template <class _Tp, class _Distance> struct random_access_iterator :
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public iterator<random_access_iterator_tag, _Tp, _Distance, _Tp*, _Tp&> {};
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# if defined (_STLP_BASE_MATCH_BUG) && defined (_STLP_USE_OLD_HP_ITERATOR_QUERIES)
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template <class _Tp, class _Distance>
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inline input_iterator_tag _STLP_CALL
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iterator_category(const input_iterator<_Tp, _Distance>&) { return input_iterator_tag(); }
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inline output_iterator_tag _STLP_CALL
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iterator_category(const output_iterator&) { return output_iterator_tag(); }
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template <class _Tp, class _Distance>
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inline forward_iterator_tag _STLP_CALL
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iterator_category(const forward_iterator<_Tp, _Distance>&) { return forward_iterator_tag(); }
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template <class _Tp, class _Distance>
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inline bidirectional_iterator_tag _STLP_CALL
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iterator_category(const bidirectional_iterator<_Tp, _Distance>&) { return bidirectional_iterator_tag(); }
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template <class _Tp, class _Distance>
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inline random_access_iterator_tag _STLP_CALL
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iterator_category(const random_access_iterator<_Tp, _Distance>&) { return random_access_iterator_tag(); }
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template <class _Tp, class _Distance>
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inline _Tp* _STLP_CALL value_type(const input_iterator<_Tp, _Distance>&) { return (_Tp*)(0); }
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template <class _Tp, class _Distance>
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inline _Tp* _STLP_CALL value_type(const forward_iterator<_Tp, _Distance>&) { return (_Tp*)(0); }
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template <class _Tp, class _Distance>
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inline _Tp* _STLP_CALL value_type(const bidirectional_iterator<_Tp, _Distance>&) { return (_Tp*)(0); }
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template <class _Tp, class _Distance>
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inline _Tp* _STLP_CALL value_type(const random_access_iterator<_Tp, _Distance>&) { return (_Tp*)(0); }
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template <class _Tp, class _Distance>
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inline _Distance* _STLP_CALL distance_type(const input_iterator<_Tp, _Distance>&) { return (_Distance*)(0); }
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template <class _Tp, class _Distance>
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inline _Distance* _STLP_CALL distance_type(const forward_iterator<_Tp, _Distance>&) { return (_Distance*)(0); }
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template <class _Tp, class _Distance>
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inline _Distance* _STLP_CALL distance_type(const bidirectional_iterator<_Tp, _Distance>&) { return (_Distance*)(0);}
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template <class _Tp, class _Distance>
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inline _Distance* _STLP_CALL distance_type(const random_access_iterator<_Tp, _Distance>&) { return (_Distance*)(0); }
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# endif /* BASE_MATCH */
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#endif /* _STLP_NO_ANACHRONISMS */
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template <class _InputIterator, class _Distance>
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inline void _STLP_CALL __distance(const _InputIterator& __first, const _InputIterator& __last,
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_Distance& __n, const input_iterator_tag &) {
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_InputIterator __it(__first);
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while (__it != __last) { ++__it; ++__n; }
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}
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# if defined (_STLP_NONTEMPL_BASE_MATCH_BUG)
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template <class _ForwardIterator, class _Distance>
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inline void _STLP_CALL __distance(const _ForwardIterator& __first, const _ForwardIterator& __last,
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_Distance& __n, const forward_iterator_tag &) {
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_ForwardIterator __it(__first);
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while (__it != __last) { ++__first; ++__n; }
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}
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template <class _BidirectionalIterator, class _Distance>
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_STLP_INLINE_LOOP void _STLP_CALL __distance(const _BidirectionalIterator& __first,
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const _BidirectionalIterator& __last,
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_Distance& __n, const bidirectional_iterator_tag &) {
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_BidirectionalIterator __it(__first);
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while (__it != __last) { ++__it; ++__n; }
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}
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# endif
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template <class _RandomAccessIterator, class _Distance>
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inline void _STLP_CALL __distance(const _RandomAccessIterator& __first,
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const _RandomAccessIterator& __last,
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_Distance& __n, const random_access_iterator_tag &) {
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__n += __last - __first;
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}
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#ifndef _STLP_NO_ANACHRONISMS
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template <class _InputIterator, class _Distance>
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inline void _STLP_CALL distance(const _InputIterator& __first,
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const _InputIterator& __last, _Distance& __n) {
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__distance(__first, __last, __n, _STLP_ITERATOR_CATEGORY(__first, _InputIterator));
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}
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#endif
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template <class _InputIterator>
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inline _STLP_DIFFERENCE_TYPE(_InputIterator) _STLP_CALL
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__distance(const _InputIterator& __first, const _InputIterator& __last, const input_iterator_tag &) {
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_STLP_DIFFERENCE_TYPE(_InputIterator) __n = 0;
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_InputIterator __it(__first);
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while (__it != __last) {
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++__it; ++__n;
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}
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return __n;
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}
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# if defined (_STLP_NONTEMPL_BASE_MATCH_BUG)
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template <class _ForwardIterator>
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inline _STLP_DIFFERENCE_TYPE(_ForwardIterator) _STLP_CALL
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__distance(const _ForwardIterator& __first, const _ForwardIterator& __last,
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const forward_iterator_tag &)
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{
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_STLP_DIFFERENCE_TYPE(_ForwardIterator) __n = 0;
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_ForwardIterator __it(__first);
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while (__it != __last) {
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++__it; ++__n;
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}
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return __n;
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}
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template <class _BidirectionalIterator>
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_STLP_INLINE_LOOP _STLP_DIFFERENCE_TYPE(_BidirectionalIterator) _STLP_CALL
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__distance(const _BidirectionalIterator& __first,
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const _BidirectionalIterator& __last,
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const bidirectional_iterator_tag &) {
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_STLP_DIFFERENCE_TYPE(_BidirectionalIterator) __n = 0;
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_BidirectionalIterator __it(__first);
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while (__it != __last) {
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++__it; ++__n;
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}
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return __n;
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}
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# endif
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template <class _RandomAccessIterator>
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inline _STLP_DIFFERENCE_TYPE(_RandomAccessIterator) _STLP_CALL
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__distance(const _RandomAccessIterator& __first, const _RandomAccessIterator& __last,
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const random_access_iterator_tag &) {
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return __last - __first;
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}
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template <class _InputIterator>
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inline _STLP_DIFFERENCE_TYPE(_InputIterator) _STLP_CALL
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distance(const _InputIterator& __first, const _InputIterator& __last) {
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return __distance(__first, __last, _STLP_ITERATOR_CATEGORY(__first, _InputIterator));
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}
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// fbp: those are being used for iterator/const_iterator definitions everywhere
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template <class _Tp>
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struct _Nonconst_traits;
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template <class _Tp>
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struct _Const_traits {
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typedef _Tp value_type;
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typedef const _Tp& reference;
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typedef const _Tp* pointer;
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typedef _Nonconst_traits<_Tp> _Non_const_traits;
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};
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template <class _Tp>
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struct _Nonconst_traits {
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typedef _Tp value_type;
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typedef _Tp& reference;
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typedef _Tp* pointer;
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typedef _Nonconst_traits<_Tp> _Non_const_traits;
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};
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# if defined (_STLP_BASE_TYPEDEF_BUG)
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// this workaround is needed for SunPro 4.0.1
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template <class _Traits>
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struct __cnst_traits_aux : private _Traits
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{
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typedef typename _Traits::value_type value_type;
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};
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# define __TRAITS_VALUE_TYPE(_Traits) __cnst_traits_aux<_Traits>::value_type
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# else
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# define __TRAITS_VALUE_TYPE(_Traits) _Traits::value_type
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# endif
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# if defined (_STLP_MSVC)
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// MSVC specific
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template <class _InputIterator, class _Dist>
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inline void _STLP_CALL _Distance(_InputIterator __first,
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_InputIterator __last, _Dist& __n) {
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__distance(__first, __last, __n, _STLP_ITERATOR_CATEGORY(__first, _InputIterator));
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}
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# endif
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template <class _InputIter, class _Distance>
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_STLP_INLINE_LOOP void _STLP_CALL __advance(_InputIter& __i, _Distance __n, const input_iterator_tag &) {
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while (__n--) ++__i;
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}
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// fbp : added output iterator tag variant
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template <class _InputIter, class _Distance>
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_STLP_INLINE_LOOP void _STLP_CALL __advance(_InputIter& __i, _Distance __n, const output_iterator_tag &) {
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while (__n--) ++__i;
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}
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# if defined (_STLP_NONTEMPL_BASE_MATCH_BUG)
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template <class _ForwardIterator, class _Distance>
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_STLP_INLINE_LOOP void _STLP_CALL __advance(_ForwardIterator& i, _Distance n, const forward_iterator_tag &) {
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while (n--) ++i;
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}
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# endif
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template <class _BidirectionalIterator, class _Distance>
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_STLP_INLINE_LOOP void _STLP_CALL __advance(_BidirectionalIterator& __i, _Distance __n,
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const bidirectional_iterator_tag &) {
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if (__n > 0)
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while (__n--) ++__i;
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else
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while (__n++) --__i;
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}
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template <class _RandomAccessIterator, class _Distance>
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inline void _STLP_CALL __advance(_RandomAccessIterator& __i, _Distance __n,
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const random_access_iterator_tag &) {
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__i += __n;
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}
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template <class _InputIterator, class _Distance>
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inline void _STLP_CALL advance(_InputIterator& __i, _Distance __n) {
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__advance(__i, __n, _STLP_ITERATOR_CATEGORY(__i, _InputIterator));
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}
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_STLP_END_NAMESPACE
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# if defined (_STLP_DEBUG) && ! defined (_STLP_DEBUG_H)
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# include <stl/debug/_debug.h>
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# endif
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#endif /* _STLP_INTERNAL_ITERATOR_BASE_H */
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// Local Variables:
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// mode:C++
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// End:
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