71 lines
1.4 KiB
C++
71 lines
1.4 KiB
C++
#pragma once
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#include "base/assert.hpp"
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namespace detail
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{
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template <class T, class TPtr>
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class array_impl
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{
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protected:
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TPtr m_p;
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size_t m_size;
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public:
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typedef T value_type;
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typedef T const & const_reference;
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typedef T & reference;
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array_impl(TPtr p, size_t sz) : m_p(p), m_size(sz) {}
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T const & operator[](size_t i) const
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{
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ASSERT_LESS(i, m_size, ());
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return m_p[i];
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}
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T const & back() const
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{
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ASSERT_GREATER(m_size, 0, ());
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return m_p[m_size - 1];
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}
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size_t size() const { return m_size; }
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bool empty() const { return (m_size == 0); }
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};
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} // namespace detail
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template <class T>
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class array_read : public detail::array_impl<T, T const *>
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{
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public:
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array_read(T const * p, size_t sz) : detail::array_impl<T, T const *>(p, sz) {}
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};
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template <class TCont>
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array_read<typename TCont::value_type> make_read_adapter(TCont const & cont)
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{
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return array_read<typename TCont::value_type>(cont.empty() ? 0 : &cont[0], cont.size());
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}
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template <class T>
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class array_write : public detail::array_impl<T, T *>
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{
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size_t m_capacity;
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typedef detail::array_impl<T, T *> base_t;
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public:
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template <class TCont>
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explicit array_write(TCont & cont)
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: detail::array_impl<T, T *>(cont.empty() ? 0 : &cont[0], 0)
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, m_capacity(cont.size())
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{}
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void push_back(T const & t)
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{
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ASSERT_LESS(base_t::m_size, m_capacity, ());
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base_t::m_p[base_t::m_size++] = t;
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}
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};
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