headers/cpp/std/indirect_array.h

   1 // The template and inlines for the -*- C++ -*- indirect_array class.
   2
   3 // Copyright (C) 1997-1999 Cygnus Solutions
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 2, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING.  If not, write to the Free
  18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19 // USA.
  20
  21 // As a special exception, you may use this file as part of a free software
  22 // library without restriction.  Specifically, if other files instantiate
  23 // templates or use macros or inline functions from this file, or you compile
  24 // this file and link it with other files to produce an executable, this
  25 // file does not by itself cause the resulting executable to be covered by
  26 // the GNU General Public License.  This exception does not however
  27 // invalidate any other reasons why the executable file might be covered by
  28 // the GNU General Public License.
  29
  30 // Written by Gabriel Dos Reis <Gabriel.Dos-Reis@DPTMaths.ENS-Cachan.Fr>
  31
  32 #ifndef __INDIRECT_ARRAY__
  33 #define __INDIRECT_ARRAY__
  34
  35 extern "C++" {
  36
  37 template <class _Tp> class indirect_array
  38 {
  39 public:
  40     typedef _Tp value_type;
  41
  42     void operator=  (const valarray<_Tp>&) const;
  43     void operator*= (const valarray<_Tp>&) const;
  44     void operator/= (const valarray<_Tp>&) const;
  45     void operator%= (const valarray<_Tp>&) const;
  46     void operator+= (const valarray<_Tp>&) const;
  47     void operator-= (const valarray<_Tp>&) const;
  48     void operator^= (const valarray<_Tp>&) const;
  49     void operator&= (const valarray<_Tp>&) const;
  50     void operator|= (const valarray<_Tp>&) const;
  51     void operator<<= (const valarray<_Tp>&) const;
  52     void operator>>= (const valarray<_Tp>&) const;
  53     void operator= (const _Tp&);
  54
  55     template<class _Dom>
  56     void operator=  (const _Expr<_Dom, _Tp>&) const;
  57     template<class _Dom>
  58     void operator*= (const _Expr<_Dom, _Tp>&) const;
  59     template<class _Dom>
  60     void operator/= (const _Expr<_Dom, _Tp>&) const;
  61     template<class _Dom>
  62     void operator%= (const _Expr<_Dom, _Tp>&) const;
  63     template<class _Dom>
  64     void operator+= (const _Expr<_Dom, _Tp>&) const;
  65     template<class _Dom>
  66     void operator-= (const _Expr<_Dom, _Tp>&) const;
  67     template<class _Dom>
  68     void operator^= (const _Expr<_Dom, _Tp>&) const;
  69     template<class _Dom>
  70     void operator&= (const _Expr<_Dom, _Tp>&) const;
  71     template<class _Dom>
  72     void operator|= (const _Expr<_Dom, _Tp>&) const;
  73     template<class _Dom>
  74     void operator<<= (const _Expr<_Dom, _Tp>&) const;
  75     template<class _Dom>
  76     void operator>>= (const _Expr<_Dom, _Tp>&) const;
  77
  78 private:
  79     indirect_array (const indirect_array&);
  80     indirect_array (_Array<_Tp>, size_t, _Array<size_t>);
  81
  82     friend class valarray<_Tp>;
  83     friend class gslice_array<_Tp>;
  84
  85     const size_t         _M_sz;
  86     const _Array<size_t> _M_index;
  87     const _Array<_Tp>    _M_array;
  88
  89     // not implemented
  90     indirect_array ();
  91     indirect_array& operator= (const indirect_array&);
  92 };
  93
  94 template<typename _Tp>
  95 inline indirect_array<_Tp>::indirect_array(const indirect_array<_Tp>& __a)
  96         : _M_sz (__a._M_sz), _M_index (__a._M_index),
  97           _M_array (__a._M_array) {}
  98
  99 template<typename _Tp>
 100 inline
 101 indirect_array<_Tp>::indirect_array (_Array<_Tp> __a, size_t __s,
 102                                      _Array<size_t> __i)
 103         : _M_sz (__s), _M_index (__i), _M_array (__a) {}
 104
 105
 106 template<typename _Tp>
 107 inline void
 108 indirect_array<_Tp>::operator= (const _Tp& __t)
 109 { __valarray_fill(_M_array, _M_index, _M_sz, __t); }
 110
 111 template<typename _Tp>
 112 inline void
 113 indirect_array<_Tp>::operator= (const valarray<_Tp>& __v) const
 114 { __valarray_copy (_Array<_Tp> (__v), _M_sz, _M_array, _M_index); }
 115
 116 template<typename _Tp>
 117 template<class _Dom>
 118 inline void
 119 indirect_array<_Tp>::operator= (const _Expr<_Dom,_Tp>& __e) const
 120 { __valarray_copy (__e, _M_sz, _M_array, _M_index); }
 121
 122 #undef _DEFINE_VALARRAY_OPERATOR
 123 #define _DEFINE_VALARRAY_OPERATOR(op, name)                             \
 124 template<typename _Tp>                                                  \
 125 inline void                                                             \
 126 indirect_array<_Tp>::operator##op##= (const valarray<_Tp>& __v) const   \
 127 {                                                                       \
 128   _Array_augmented_##name (_M_array, _M_index, _Array<_Tp> (__v), _M_sz); \
 129 }                                                                       \
 130                                                                         \
 131 template<typename _Tp> template<class _Dom>                             \
 132 inline void                                                             \
 133 indirect_array<_Tp>::operator##op##= (const _Expr<_Dom,_Tp>& __e) const \
 134 {                                                                       \
 135   _Array_augmented_##name (_M_array, _M_index, __e, _M_sz);             \
 136 }
 137
 138 _DEFINE_VALARRAY_OPERATOR(*, multiplies)
 139 _DEFINE_VALARRAY_OPERATOR(/, divides)
 140 _DEFINE_VALARRAY_OPERATOR(%, modulus)
 141 _DEFINE_VALARRAY_OPERATOR(+, plus)
 142 _DEFINE_VALARRAY_OPERATOR(-, minus)
 143 _DEFINE_VALARRAY_OPERATOR(^, xor)
 144 _DEFINE_VALARRAY_OPERATOR(&, and)
 145 _DEFINE_VALARRAY_OPERATOR(|, or)
 146 _DEFINE_VALARRAY_OPERATOR(<<, shift_left)
 147 _DEFINE_VALARRAY_OPERATOR(>>, shift_right)
 148
 149 #undef _DEFINE_VALARRAY_OPERATOR
 150
 151 } // extern "C++"
 152
 153 #endif // __INDIRECT_ARRAY__
 154
 155 // Local Variables:
 156 // mode:c++
 157 // End: