headers/cpp/std/mask_array.h

   1 // The template and inlines for the -*- C++ -*- mask_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 __MASK_ARRAY__
  33 #define __MASK_ARRAY__
  34
  35 extern "C++" {
  36
  37 template <class _T> class mask_array
  38 {
  39 public:
  40     typedef _T value_type;
  41
  42     void operator=  (const valarray<_T>&) const;
  43     void operator*= (const valarray<_T>&) const;
  44     void operator/= (const valarray<_T>&) const;
  45     void operator%= (const valarray<_T>&) const;
  46     void operator+= (const valarray<_T>&) const;
  47     void operator-= (const valarray<_T>&) const;
  48     void operator^= (const valarray<_T>&) const;
  49     void operator&= (const valarray<_T>&) const;
  50     void operator|= (const valarray<_T>&) const;
  51     void operator<<=(const valarray<_T>&) const;
  52     void operator>>=(const valarray<_T>&) const;
  53     void operator= (const _T&);
  54
  55     template<class _Dom>
  56     void operator=  (const _Expr<_Dom,_T>&) const;
  57     template<class _Dom>
  58     void operator*= (const _Expr<_Dom,_T>&) const;
  59     template<class _Dom>
  60     void operator/= (const _Expr<_Dom,_T>&) const;
  61     template<class _Dom>
  62     void operator%= (const _Expr<_Dom,_T>&) const;
  63     template<class _Dom>
  64     void operator+= (const _Expr<_Dom,_T>&) const;
  65     template<class _Dom>
  66     void operator-= (const _Expr<_Dom,_T>&) const;
  67     template<class _Dom>
  68     void operator^= (const _Expr<_Dom,_T>&) const;
  69     template<class _Dom>
  70     void operator&= (const _Expr<_Dom,_T>&) const;
  71     template<class _Dom>
  72     void operator|= (const _Expr<_Dom,_T>&) const;
  73     template<class _Dom>
  74     void operator<<=(const _Expr<_Dom,_T>&) const;
  75     template<class _Dom>
  76     void operator>>=(const _Expr<_Dom,_T>&) const;
  77
  78 private:
  79     mask_array (_Array<_T>, size_t, _Array<bool>);
  80     friend class valarray<_T>;
  81
  82     const size_t       _M_sz;
  83     const _Array<bool> _M_mask;
  84     const _Array<_T>   _M_array;
  85
  86     mask_array (const mask_array&);
  87
  88     // not implemented
  89     mask_array ();
  90     mask_array& operator= (const mask_array&);
  91 };
  92
  93 template<typename _Tp>
  94 inline mask_array<_Tp>::mask_array (const mask_array<_Tp>& a)
  95         : _M_sz (a._M_sz), _M_mask (a._M_mask), _M_array (a._M_array) {}
  96
  97 template<typename _T>
  98 inline
  99 mask_array<_T>::mask_array (_Array<_T> __a, size_t __s, _Array<bool> __m)
 100         : _M_sz (__s), _M_mask (__m), _M_array (__a) {}
 101
 102 template<typename _T>
 103 inline void
 104 mask_array<_T>::operator= (const _T& __t)
 105 { __valarray_fill (_M_array, _M_sz, _M_mask, __t); }
 106
 107 template<typename _T>
 108 inline void
 109 mask_array<_T>::operator= (const valarray<_T>& __v) const
 110 { __valarray_copy (_Array<_T> (__v), __v.size (), _M_array, _M_mask); }
 111
 112 template<typename _T>
 113 template<class E>
 114 inline void
 115 mask_array<_T>::operator= (const _Expr<E, _T>& __e) const
 116 { __valarray_copy (__e, __e.size (), _M_array, _M_mask); }
 117
 118 #undef _DEFINE_VALARRAY_OPERATOR
 119 #define _DEFINE_VALARRAY_OPERATOR(op, name)                             \
 120 template<typename _T>                                                   \
 121 inline void                                                             \
 122 mask_array<_T>::operator##op##= (const valarray<_T>& __v) const         \
 123 {                                                                       \
 124   _Array_augmented_##name (_M_array, _M_mask,                           \
 125                            _Array<_T> (__v), __v.size ());              \
 126 }                                                                       \
 127                                                                         \
 128 template<typename _T> template<class E>                                 \
 129 inline void                                                             \
 130 mask_array<_T>::operator##op##= (const _Expr<E, _T>& __e) const         \
 131 {                                                                       \
 132   _Array_augmented_##name (_M_array, _M_mask, __e, __e.size ());        \
 133 }
 134
 135 _DEFINE_VALARRAY_OPERATOR(*, multiplies)
 136 _DEFINE_VALARRAY_OPERATOR(/, divides)
 137 _DEFINE_VALARRAY_OPERATOR(%, modulus)
 138 _DEFINE_VALARRAY_OPERATOR(+, plus)
 139 _DEFINE_VALARRAY_OPERATOR(-, minus)
 140 _DEFINE_VALARRAY_OPERATOR(^, xor)
 141 _DEFINE_VALARRAY_OPERATOR(&, and)
 142 _DEFINE_VALARRAY_OPERATOR(|, or)
 143 _DEFINE_VALARRAY_OPERATOR(<<, shift_left)
 144 _DEFINE_VALARRAY_OPERATOR(>>, shift_right)
 145
 146 #undef _DEFINE_VALARRAY_OPERATOR
 147
 148 } // extern "C++"
 149
 150 #endif // __MASK_ARRAY__
 151
 152 // Local Variables:
 153 // mode:c++
 154 // End: