69 lines
1.6 KiB
C++
69 lines
1.6 KiB
C++
#pragma once
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#if defined(DXX_BUILD_DESCENT_I) || defined(DXX_BUILD_DESCENT_II)
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#include <iterator>
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#include "dxxsconf.h"
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#include "object.h"
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#include "segment.h"
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namespace detail
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{
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template <typename>
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struct unspecified_pointer_t;
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};
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template <typename T>
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class segment_object_iterator_t : public std::iterator<std::forward_iterator_tag, T, std::ptrdiff_t, typename detail::unspecified_pointer_t<T>, T>, T
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{
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using T::m_ptr;
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using T::m_idx;
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public:
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segment_object_iterator_t(T o) :
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T(o)
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{
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}
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T operator *() { return *static_cast<T *>(this); }
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segment_object_iterator_t &operator++()
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{
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const auto ni = m_ptr->next;
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m_ptr = (ni == object_none) ? nullptr : m_ptr + (static_cast<std::size_t>(ni) - static_cast<std::size_t>(m_idx));
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m_idx = ni;
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return *this;
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}
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bool operator==(const segment_object_iterator_t &rhs) const
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{
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return m_idx == rhs.m_idx;
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}
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bool operator!=(const segment_object_iterator_t &rhs) const
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{
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return !(*this == rhs);
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}
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};
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template <typename T>
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struct segment_object_range_t
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{
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segment_object_iterator_t<T> b;
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segment_object_range_t(T o) :
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b(o)
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{
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}
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segment_object_iterator_t<T> begin() const { return b; }
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segment_object_iterator_t<T> end() const { return T(object_none); }
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};
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__attribute_warn_unused_result
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static inline segment_object_range_t<objptridx_t> objects_in(segment &s)
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{
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return s.objects == object_none ? objptridx(object_none) : objptridx(s.objects);
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}
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__attribute_warn_unused_result
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static inline segment_object_range_t<cobjptridx_t> objects_in(const segment &s)
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{
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return s.objects == object_none ? cobjptridx(object_none) : cobjptridx(s.objects);
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}
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#endif
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