ossrv_pub/boost_apis/boost/scoped_array.hpp
author Pat Downey <patd@symbian.org>
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#ifndef BOOST_SCOPED_ARRAY_HPP_INCLUDED
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#define BOOST_SCOPED_ARRAY_HPP_INCLUDED
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//  (C) Copyright Greg Colvin and Beman Dawes 1998, 1999.
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//  Copyright (c) 2001, 2002 Peter Dimov
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//
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//  Distributed under the Boost Software License, Version 1.0. (See
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//  accompanying file LICENSE_1_0.txt or copy at
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//  http://www.boost.org/LICENSE_1_0.txt)
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//
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//  http://www.boost.org/libs/smart_ptr/scoped_array.htm
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//
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#include <boost/assert.hpp>
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#include <boost/checked_delete.hpp>
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#include <boost/config.hpp>   // in case ptrdiff_t not in std
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#include <boost/detail/workaround.hpp>
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#include <cstddef>            // for std::ptrdiff_t
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namespace boost
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{
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// Debug hooks
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#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
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void sp_array_constructor_hook(void * p);
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void sp_array_destructor_hook(void * p);
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#endif
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//  scoped_array extends scoped_ptr to arrays. Deletion of the array pointed to
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//  is guaranteed, either on destruction of the scoped_array or via an explicit
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//  reset(). Use shared_array or std::vector if your needs are more complex.
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template<class T> class scoped_array // noncopyable
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{
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private:
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    T * ptr;
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    scoped_array(scoped_array const &);
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    scoped_array & operator=(scoped_array const &);
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    typedef scoped_array<T> this_type;
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public:
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    typedef T element_type;
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    explicit scoped_array(T * p = 0) : ptr(p) // never throws
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    {
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#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
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        boost::sp_array_constructor_hook(ptr);
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#endif
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    }
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    ~scoped_array() // never throws
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    {
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#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
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        boost::sp_array_destructor_hook(ptr);
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#endif
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        boost::checked_array_delete(ptr);
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    }
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    void reset(T * p = 0) // never throws
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    {
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        BOOST_ASSERT(p == 0 || p != ptr); // catch self-reset errors
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        this_type(p).swap(*this);
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    }
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    T & operator[](std::ptrdiff_t i) const // never throws
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    {
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        BOOST_ASSERT(ptr != 0);
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        BOOST_ASSERT(i >= 0);
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        return ptr[i];
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    }
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    T * get() const // never throws
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    {
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        return ptr;
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    }
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    // implicit conversion to "bool"
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#if defined(__SUNPRO_CC) && BOOST_WORKAROUND(__SUNPRO_CC, <= 0x530)
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    operator bool () const
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    {
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        return ptr != 0;
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    }
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#elif defined(__MWERKS__) && BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003))
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    typedef T * (this_type::*unspecified_bool_type)() const;
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    operator unspecified_bool_type() const // never throws
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    {
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        return ptr == 0? 0: &this_type::get;
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    }
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#else 
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    typedef T * this_type::*unspecified_bool_type;
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    operator unspecified_bool_type() const // never throws
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    {
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        return ptr == 0? 0: &this_type::ptr;
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    }
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#endif
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    bool operator! () const // never throws
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    {
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        return ptr == 0;
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    }
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    void swap(scoped_array & b) // never throws
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    {
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        T * tmp = b.ptr;
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        b.ptr = ptr;
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        ptr = tmp;
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    }
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};
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template<class T> inline void swap(scoped_array<T> & a, scoped_array<T> & b) // never throws
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{
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    a.swap(b);
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}
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} // namespace boost
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#endif  // #ifndef BOOST_SCOPED_ARRAY_HPP_INCLUDED