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+/*
+ *
+ * Copyright 2009, The Android Open Source Project
+ * 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.
+ */
+
+/* NOTE: This is an internal header file, included by other STL headers.
+ * You should not attempt to use it directly.
+ */
+
+#ifndef __SGI_STL_INTERNAL_ITERATOR_BASE_H
+#define __SGI_STL_INTERNAL_ITERATOR_BASE_H
+
+// This file contains all of the general iterator-related utilities.
+// The internal file stl_iterator.h contains predefined iterators,
+// such as front_insert_iterator and istream_iterator.
+
+#include <concept_checks.h>
+
+struct input_iterator_tag {};
+struct output_iterator_tag {};
+struct forward_iterator_tag : public input_iterator_tag {};
+struct bidirectional_iterator_tag : public forward_iterator_tag {};
+struct random_access_iterator_tag : public bidirectional_iterator_tag {};
+
+// The base classes input_iterator, output_iterator, forward_iterator,
+// bidirectional_iterator, and random_access_iterator are not part of
+// the C++ standard. (They have been replaced by struct iterator.)
+// They are included for backward compatibility with the HP STL.
+
+template <class _Tp, class _Distance> struct input_iterator {
+ typedef input_iterator_tag iterator_category;
+ typedef _Tp value_type;
+ typedef _Distance difference_type;
+ typedef _Tp* pointer;
+ typedef _Tp& reference;
+};
+
+struct output_iterator {
+ typedef output_iterator_tag iterator_category;
+ typedef void value_type;
+ typedef void difference_type;
+ typedef void pointer;
+ typedef void reference;
+};
+
+template <class _Tp, class _Distance> struct forward_iterator {
+ typedef forward_iterator_tag iterator_category;
+ typedef _Tp value_type;
+ typedef _Distance difference_type;
+ typedef _Tp* pointer;
+ typedef _Tp& reference;
+};
+
+
+template <class _Tp, class _Distance> struct bidirectional_iterator {
+ typedef bidirectional_iterator_tag iterator_category;
+ typedef _Tp value_type;
+ typedef _Distance difference_type;
+ typedef _Tp* pointer;
+ typedef _Tp& reference;
+};
+
+template <class _Tp, class _Distance> struct random_access_iterator {
+ typedef random_access_iterator_tag iterator_category;
+ typedef _Tp value_type;
+ typedef _Distance difference_type;
+ typedef _Tp* pointer;
+ typedef _Tp& reference;
+};
+
+template <class _Category, class _Tp, class _Distance = ptrdiff_t,
+ class _Pointer = _Tp*, class _Reference = _Tp&>
+struct iterator {
+ typedef _Category iterator_category;
+ typedef _Tp value_type;
+ typedef _Distance difference_type;
+ typedef _Pointer pointer;
+ typedef _Reference reference;
+};
+
+template <class _Iterator>
+struct iterator_traits {
+ typedef typename _Iterator::iterator_category iterator_category;
+ typedef typename _Iterator::value_type value_type;
+ typedef typename _Iterator::difference_type difference_type;
+ typedef typename _Iterator::pointer pointer;
+ typedef typename _Iterator::reference reference;
+};
+
+template <class _Tp>
+struct iterator_traits<_Tp*> {
+ typedef random_access_iterator_tag iterator_category;
+ typedef _Tp value_type;
+ typedef ptrdiff_t difference_type;
+ typedef _Tp* pointer;
+ typedef _Tp& reference;
+};
+
+template <class _Tp>
+struct iterator_traits<const _Tp*> {
+ typedef random_access_iterator_tag iterator_category;
+ typedef _Tp value_type;
+ typedef ptrdiff_t difference_type;
+ typedef const _Tp* pointer;
+ typedef const _Tp& reference;
+};
+
+// The overloaded functions iterator_category, distance_type, and
+// value_type are not part of the C++ standard. (They have been
+// replaced by struct iterator_traits.) They are included for
+// backward compatibility with the HP STL.
+
+// We introduce internal names for these functions.
+
+template <class _Iter>
+inline typename iterator_traits<_Iter>::iterator_category
+__iterator_category(const _Iter&)
+{
+ typedef typename iterator_traits<_Iter>::iterator_category _Category;
+ return _Category();
+}
+
+template <class _Iter>
+inline typename iterator_traits<_Iter>::difference_type*
+__distance_type(const _Iter&)
+{
+ return static_cast<typename iterator_traits<_Iter>::difference_type*>(0);
+}
+
+template <class _Iter>
+inline typename iterator_traits<_Iter>::value_type*
+__value_type(const _Iter&)
+{
+ return static_cast<typename iterator_traits<_Iter>::value_type*>(0);
+}
+
+template <class _Iter>
+inline typename iterator_traits<_Iter>::iterator_category
+iterator_category(const _Iter& __i) { return __iterator_category(__i); }
+
+
+template <class _Iter>
+inline typename iterator_traits<_Iter>::difference_type*
+distance_type(const _Iter& __i) { return __distance_type(__i); }
+
+template <class _Iter>
+inline typename iterator_traits<_Iter>::value_type*
+value_type(const _Iter& __i) { return __value_type(__i); }
+
+#define __ITERATOR_CATEGORY(__i) __iterator_category(__i)
+#define __DISTANCE_TYPE(__i) __distance_type(__i)
+#define __VALUE_TYPE(__i) __value_type(__i)
+
+template <class _InputIterator, class _Distance>
+inline void __distance(_InputIterator __first, _InputIterator __last,
+ _Distance& __n, input_iterator_tag)
+{
+ while (__first != __last) { ++__first; ++__n; }
+}
+
+template <class _RandomAccessIterator, class _Distance>
+inline void __distance(_RandomAccessIterator __first,
+ _RandomAccessIterator __last,
+ _Distance& __n, random_access_iterator_tag)
+{
+ __STL_REQUIRES(_RandomAccessIterator, _RandomAccessIterator);
+ __n += __last - __first;
+}
+
+template <class _InputIterator, class _Distance>
+inline void distance(_InputIterator __first,
+ _InputIterator __last, _Distance& __n)
+{
+ __STL_REQUIRES(_InputIterator, _InputIterator);
+ __distance(__first, __last, __n, iterator_category(__first));
+}
+
+#ifdef __STL_CLASS_PARTIAL_SPECIALIZATION
+
+template <class _InputIterator>
+inline typename iterator_traits<_InputIterator>::difference_type
+__distance(_InputIterator __first, _InputIterator __last, input_iterator_tag)
+{
+ typename iterator_traits<_InputIterator>::difference_type __n = 0;
+ while (__first != __last) {
+ ++__first; ++__n;
+ }
+ return __n;
+}
+
+template <class _RandomAccessIterator>
+inline typename iterator_traits<_RandomAccessIterator>::difference_type
+__distance(_RandomAccessIterator __first, _RandomAccessIterator __last,
+ random_access_iterator_tag) {
+ __STL_REQUIRES(_RandomAccessIterator, _RandomAccessIterator);
+ return __last - __first;
+}
+
+template <class _InputIterator>
+inline typename iterator_traits<_InputIterator>::difference_type
+distance(_InputIterator __first, _InputIterator __last) {
+ typedef typename iterator_traits<_InputIterator>::iterator_category
+ _Category;
+ __STL_REQUIRES(_InputIterator, _InputIterator);
+ return __distance(__first, __last, _Category());
+}
+
+#endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */
+
+template <class _InputIter, class _Distance>
+inline void __advance(_InputIter& __i, _Distance __n, input_iterator_tag) {
+ while (__n--) ++__i;
+}
+
+#if defined(__sgi) && !defined(__GNUC__) && (_MIPS_SIM != _MIPS_SIM_ABI32)
+#pragma set woff 1183
+#endif
+
+template <class _BidirectionalIterator, class _Distance>
+inline void __advance(_BidirectionalIterator& __i, _Distance __n,
+ bidirectional_iterator_tag) {
+ __STL_REQUIRES(_BidirectionalIterator, _BidirectionalIterator);
+ if (__n >= 0)
+ while (__n--) ++__i;
+ else
+ while (__n++) --__i;
+}
+
+#if defined(__sgi) && !defined(__GNUC__) && (_MIPS_SIM != _MIPS_SIM_ABI32)
+#pragma reset woff 1183
+#endif
+
+template <class _RandomAccessIterator, class _Distance>
+inline void __advance(_RandomAccessIterator& __i, _Distance __n,
+ random_access_iterator_tag) {
+ __STL_REQUIRES(_RandomAccessIterator, _RandomAccessIterator);
+ __i += __n;
+}
+
+template <class _InputIterator, class _Distance>
+inline void advance(_InputIterator& __i, _Distance __n) {
+ __STL_REQUIRES(_InputIterator, _InputIterator);
+ __advance(__i, __n, iterator_category(__i));
+}
+
+#endif /* __SGI_STL_INTERNAL_ITERATOR_BASE_H */
+
+
+
+// Local Variables:
+// mode:C++
+// End: