# mask_array.h

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    00001 // The template and inlines for the -*- C++ -*- mask_array class.
    00002
    00003 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002
    00004 //  Free Software Foundation, Inc.
    00005 //
    00006 // This file is part of the GNU ISO C++ Library.  This library is free
    00007 // software; you can redistribute it and/or modify it under the
    00008 // terms of the GNU General Public License as published by the
    00009 // Free Software Foundation; either version 2, or (at your option)
    00010 // any later version.
    00011
    00012 // This library is distributed in the hope that it will be useful,
    00013 // but WITHOUT ANY WARRANTY; without even the implied warranty of
    00014 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    00015 // GNU General Public License for more details.
    00016
    00017 // You should have received a copy of the GNU General Public License along
    00018 // with this library; see the file COPYING.  If not, write to the Free
    00019 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
    00020 // USA.
    00021
    00022 // As a special exception, you may use this file as part of a free software
    00023 // library without restriction.  Specifically, if other files instantiate
    00024 // templates or use macros or inline functions from this file, or you compile
    00025 // this file and link it with other files to produce an executable, this
    00026 // file does not by itself cause the resulting executable to be covered by
    00027 // the GNU General Public License.  This exception does not however
    00028 // invalidate any other reasons why the executable file might be covered by
    00029 // the GNU General Public License.
    00030
    00031 // Written by Gabriel Dos Reis <Gabriel.Dos-Reis@DPTMaths.ENS-Cachan.Fr>
    00032
    00038 #ifndef _CPP_BITS_MASK_ARRAY_H
    00039 #define _CPP_BITS_MASK_ARRAY_H 1
    00040
    00041 #pragma GCC system_header
    00042
    00043 namespace std {
    00044
    00045   template <class _Tp>
    00046     class mask_array
    00047     {
    00048     public:
    00049       typedef _Tp value_type;
    00050
    00051       void operator=(const valarray<_Tp>&) const;
    00052       void operator*=(const valarray<_Tp>&) const;
    00053       void operator/=(const valarray<_Tp>&) const;
    00054       void operator%=(const valarray<_Tp>&) const;
    00055       void operator+=(const valarray<_Tp>&) const;
    00056       void operator-=(const valarray<_Tp>&) const;
    00057       void operator^=(const valarray<_Tp>&) const;
    00058       void operator&=(const valarray<_Tp>&) const;
    00059       void operator|=(const valarray<_Tp>&) const;
    00060       void operator<<=(const valarray<_Tp>&) const;
    00061       void operator>>=(const valarray<_Tp>&) const;
    00062       void operator=(const _Tp&) const;
    00063
    00064         //        ~mask_array ();
    00065
    00066       template<class _Dom>
    00067         void operator=(const _Expr<_Dom,_Tp>&) const;
    00068       template<class _Dom>
    00069         void operator*=(const _Expr<_Dom,_Tp>&) const;
    00070       template<class _Dom>
    00071         void operator/=(const _Expr<_Dom,_Tp>&) const;
    00072       template<class _Dom>
    00073         void operator%=(const _Expr<_Dom,_Tp>&) const;
    00074       template<class _Dom>
    00075         void operator+=(const _Expr<_Dom,_Tp>&) const;
    00076       template<class _Dom>
    00077         void operator-=(const _Expr<_Dom,_Tp>&) const;
    00078       template<class _Dom>
    00079         void operator^=(const _Expr<_Dom,_Tp>&) const;
    00080       template<class _Dom>
    00081         void operator&=(const _Expr<_Dom,_Tp>&) const;
    00082       template<class _Dom>
    00083         void operator|=(const _Expr<_Dom,_Tp>&) const;
    00084       template<class _Dom>
    00085         void operator<<=(const _Expr<_Dom,_Tp>&) const;
    00086       template<class _Dom>
    00087         void operator>>=(const _Expr<_Dom,_Tp>&) const;
    00088
    00089     private:
    00090       mask_array(_Array<_Tp>, size_t, _Array<bool>);
    00091       friend class valarray<_Tp>;
    00092
    00093       const size_t       _M_sz;
    00094       const _Array<bool> _M_mask;
    00095       const _Array<_Tp>   _M_array;
    00096
    00097       mask_array (const mask_array&);
    00098
    00099       // not implemented
    00100       mask_array();
    00101       mask_array& operator=(const mask_array&);
    00102     };
    00103
    00104
    00105   template<typename _Tp>
    00106     inline mask_array<_Tp>::mask_array(const mask_array<_Tp>& a)
    00107       : _M_sz(a._M_sz), _M_mask(a._M_mask), _M_array(a._M_array) {}
    00108
    00109   template<typename _Tp>
    00110     inline
    00111     mask_array<_Tp>::mask_array(_Array<_Tp> __a, size_t __s, _Array<bool> __m)
    00112       : _M_sz(__s), _M_mask(__m), _M_array(__a) {}
    00113
    00114   template<typename _Tp>
    00115     inline void
    00116     mask_array<_Tp>::operator=(const _Tp& __t) const
    00117     { __valarray_fill(_M_array, _M_sz, _M_mask, __t); }
    00118
    00119   template<typename _Tp>
    00120     inline void
    00121     mask_array<_Tp>::operator=(const valarray<_Tp>& __v) const
    00122     { __valarray_copy(_Array<_Tp>(__v), __v.size(), _M_array, _M_mask); }
    00123
    00124   template<typename _Tp>
    00125     template<class _Ex>
    00126       inline void
    00127       mask_array<_Tp>::operator=(const _Expr<_Ex, _Tp>& __e) const
    00128       { __valarray_copy(__e, __e.size(), _M_array, _M_mask); }
    00129
    00130 #undef _DEFINE_VALARRAY_OPERATOR
    00131 #define _DEFINE_VALARRAY_OPERATOR(_Op, _Name)               \
    00132   template<typename _Tp>                        \
    00133     inline void                             \
    00134     mask_array<_Tp>::operator _Op##=(const valarray<_Tp>& __v) const    \
    00135     {                                   \
    00136       _Array_augmented_##_Name(_M_array, _M_mask,           \
    00137                    _Array<_Tp>(__v), __v.size());       \
    00138     }                                   \
    00139                                     \
    00140   template<typename _Tp>                                                \
    00141     template<class _Dom>                                    \
    00142       inline void                           \
    00143       mask_array<_Tp>::operator _Op##=(const _Expr<_Dom, _Tp>& __e) const\
    00144       {                                 \
    00145     _Array_augmented_##_Name(_M_array, _M_mask, __e, __e.size());   \
    00146       }
    00147
    00148 _DEFINE_VALARRAY_OPERATOR(*, __multiplies)
    00149 _DEFINE_VALARRAY_OPERATOR(/, __divides)
    00150 _DEFINE_VALARRAY_OPERATOR(%, __modulus)
    00151 _DEFINE_VALARRAY_OPERATOR(+, __plus)
    00152 _DEFINE_VALARRAY_OPERATOR(-, __minus)
    00153 _DEFINE_VALARRAY_OPERATOR(^, __bitwise_xor)
    00154 _DEFINE_VALARRAY_OPERATOR(&, __bitwise_and)
    00155 _DEFINE_VALARRAY_OPERATOR(|, __bitwise_or)
    00156 _DEFINE_VALARRAY_OPERATOR(<<, __shift_left)
    00157 _DEFINE_VALARRAY_OPERATOR(>>, __shift_right)
    00158
    00159 #undef _DEFINE_VALARRAY_OPERATOR
    00160
    00161 } // std::
    00162
    00163 #endif /* _CPP_BITS_MASK_ARRAY_H */
    00164
    00165 // Local Variables:
    00166 // mode:c++
    00167 // End: