external/bsd/atf/dist/atf-c++/detail/auto_array.hpp

   1 //
   2 // Automated Testing Framework (atf)
   3 //
   4 // Copyright (c) 2007 The NetBSD Foundation, Inc.
   5 // All rights reserved.
   6 //
   7 // Redistribution and use in source and binary forms, with or without
   8 // modification, are permitted provided that the following conditions
   9 // are met:
  10 // 1. Redistributions of source code must retain the above copyright
  11 //    notice, this list of conditions and the following disclaimer.
  12 // 2. Redistributions in binary form must reproduce the above copyright
  13 //    notice, this list of conditions and the following disclaimer in the
  14 //    documentation and/or other materials provided with the distribution.
  15 //
  16 // THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
  17 // CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
  18 // INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  19 // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20 // IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY
  21 // DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22 // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  23 // GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  24 // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  25 // IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  26 // OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  27 // IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28 //
  29
  30 #if !defined(_ATF_CXX_AUTO_ARRAY_HPP_)
  31 #define _ATF_CXX_AUTO_ARRAY_HPP_
  32
  33 #include <cstddef>
  34
  35 namespace atf {
  36
  37 // ------------------------------------------------------------------------
  38 // The "auto_array" class.
  39 // ------------------------------------------------------------------------
  40
  41 template< class T >
  42 struct auto_array_ref {
  43     T* m_ptr;
  44
  45     explicit auto_array_ref(T*);
  46 };
  47
  48 template< class T >
  49 auto_array_ref< T >::auto_array_ref(T* ptr) :
  50     m_ptr(ptr)
  51 {
  52 }
  53
  54 template< class T >
  55 class auto_array {
  56     T* m_ptr;
  57
  58 public:
  59     auto_array(T* = NULL) throw();
  60     auto_array(auto_array< T >&) throw();
  61     auto_array(auto_array_ref< T >) throw();
  62     ~auto_array(void) throw();
  63
  64     T* get(void) throw();
  65     const T* get(void) const throw();
  66     T* release(void) throw();
  67     void reset(T* = NULL) throw();
  68
  69     auto_array< T >& operator=(auto_array< T >&) throw();
  70     auto_array< T >& operator=(auto_array_ref< T >) throw();
  71
  72     T& operator[](int) throw();
  73     operator auto_array_ref< T >(void) throw();
  74 };
  75
  76 template< class T >
  77 auto_array< T >::auto_array(T* ptr)
  78     throw() :
  79     m_ptr(ptr)
  80 {
  81 }
  82
  83 template< class T >
  84 auto_array< T >::auto_array(auto_array< T >& ptr)
  85     throw() :
  86     m_ptr(ptr.release())
  87 {
  88 }
  89
  90 template< class T >
  91 auto_array< T >::auto_array(auto_array_ref< T > ref)
  92     throw() :
  93     m_ptr(ref.m_ptr)
  94 {
  95 }
  96
  97 template< class T >
  98 auto_array< T >::~auto_array(void)
  99     throw()
 100 {
 101     if (m_ptr != NULL)
 102         delete [] m_ptr;
 103 }
 104
 105 template< class T >
 106 T*
 107 auto_array< T >::get(void)
 108     throw()
 109 {
 110     return m_ptr;
 111 }
 112
 113 template< class T >
 114 const T*
 115 auto_array< T >::get(void)
 116     const throw()
 117 {
 118     return m_ptr;
 119 }
 120
 121 template< class T >
 122 T*
 123 auto_array< T >::release(void)
 124     throw()
 125 {
 126     T* ptr = m_ptr;
 127     m_ptr = NULL;
 128     return ptr;
 129 }
 130
 131 template< class T >
 132 void
 133 auto_array< T >::reset(T* ptr)
 134     throw()
 135 {
 136     if (m_ptr != NULL)
 137         delete [] m_ptr;
 138     m_ptr = ptr;
 139 }
 140
 141 template< class T >
 142 auto_array< T >&
 143 auto_array< T >::operator=(auto_array< T >& ptr)
 144     throw()
 145 {
 146     reset(ptr.release());
 147     return *this;
 148 }
 149
 150 template< class T >
 151 auto_array< T >&
 152 auto_array< T >::operator=(auto_array_ref< T > ref)
 153     throw()
 154 {
 155     if (m_ptr != ref.m_ptr) {
 156         delete [] m_ptr;
 157         m_ptr = ref.m_ptr;
 158     }
 159     return *this;
 160 }
 161
 162 template< class T >
 163 T&
 164 auto_array< T >::operator[](int pos)
 165     throw()
 166 {
 167     return m_ptr[pos];
 168 }
 169
 170 template< class T >
 171 auto_array< T >::operator auto_array_ref< T >(void)
 172     throw()
 173 {
 174     return auto_array_ref< T >(release());
 175 }
 176
 177 } // namespace atf
 178
 179 #endif // !defined(_ATF_CXX_AUTO_ARRAY_HPP_)