headers/cpp/std/gslice_array.h

   1 // The template and inlines for the -*- C++ -*- gslice_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 __GSLICE_ARRAY__
  33 #define __GSLICE_ARRAY__
  34
  35 extern "C++" {
  36
  37 template<typename _Tp> class gslice_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     _Array<_Tp>    _M_array;
  80     const valarray<size_t>& _M_index;
  81
  82     friend class valarray<_Tp>;
  83
  84     gslice_array (_Array<_Tp>, const valarray<size_t>&);
  85
  86     // this constructor needs to be implemented.
  87     gslice_array (const gslice_array&);
  88
  89     // not implemented
  90     gslice_array();
  91     gslice_array& operator= (const gslice_array&);
  92 };
  93
  94 template<typename _Tp>
  95 inline
  96 gslice_array<_Tp>::gslice_array (_Array<_Tp> __a,
  97                                  const valarray<size_t>& __i)
  98         : _M_array (__a), _M_index (__i) {}
  99
 100
 101 template<typename _Tp>
 102 inline
 103 gslice_array<_Tp>::gslice_array (const gslice_array<_Tp>& __a)
 104         : _M_array (__a._M_array), _M_index (__a._M_index) {}
 105
 106
 107 template<typename _Tp>
 108 inline void
 109 gslice_array<_Tp>::operator= (const _Tp& __t)
 110 {
 111     __valarray_fill (_M_array, _Array<size_t>(_M_index),
 112                      _M_index.size(), __t);
 113 }
 114
 115 template<typename _Tp>
 116 inline void
 117 gslice_array<_Tp>::operator= (const valarray<_Tp>& __v) const
 118 {
 119     __valarray_copy (_Array<_Tp> (__v), __v.size (),
 120                      _M_array, _Array<size_t>(_M_index));
 121 }
 122
 123 template<typename _Tp>
 124 template<class E>
 125 inline void
 126 gslice_array<_Tp>::operator= (const _Expr<E, _Tp>& __e) const
 127 {
 128     __valarray_copy (__e, _M_index.size(), _M_array,
 129                      _Array<size_t>(_M_index));
 130 }
 131
 132 #undef _DEFINE_VALARRAY_OPERATOR
 133 #define _DEFINE_VALARRAY_OPERATOR(op, name)                             \
 134 template<typename _Tp>                                                  \
 135 inline void                                                             \
 136 gslice_array<_Tp>::operator##op##= (const valarray<_Tp>& __v) const     \
 137 {                                                                       \
 138     _Array_augmented_##name (_M_array, _Array<size_t>(_M_index),        \
 139                               _Array<_Tp> (__v), __v.size ());          \
 140 }                                                                       \
 141                                                                         \
 142 template<typename _Tp> template<class E>                                \
 143 inline void                                                             \
 144 gslice_array<_Tp>::operator##op##= (const _Expr<E, _Tp>& __e) const     \
 145 {                                                                       \
 146     _Array_augmented_##name (_M_array, _Array<size_t>(_M_index), __e,   \
 147                               _M_index.size());                         \
 148 }
 149
 150 _DEFINE_VALARRAY_OPERATOR(*, multiplies)
 151 _DEFINE_VALARRAY_OPERATOR(/, divides)
 152 _DEFINE_VALARRAY_OPERATOR(%, modulus)
 153 _DEFINE_VALARRAY_OPERATOR(+, plus)
 154 _DEFINE_VALARRAY_OPERATOR(-, minus)
 155 _DEFINE_VALARRAY_OPERATOR(^, xor)
 156 _DEFINE_VALARRAY_OPERATOR(&, and)
 157 _DEFINE_VALARRAY_OPERATOR(|, or)
 158 _DEFINE_VALARRAY_OPERATOR(<<, shift_left)
 159 _DEFINE_VALARRAY_OPERATOR(>>, shift_right)
 160
 161 #undef _DEFINE_VALARRAY_OPERATOR
 162
 163 } // extern "C++"
 164
 165
 166 #endif // __GSLICE_ARRAY__
 167
 168 // Local Variables:
 169 // mode:c++
 170 // End: