mask_array.h

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00001 // The template and inlines for the -*- C++ -*- mask_array class.
00002 
00003 // Copyright (C) 1997-2001 Free Software Foundation, Inc.
00004 //
00005 // This file is part of the GNU ISO C++ Library.  This library is free
00006 // software; you can redistribute it and/or modify it under the
00007 // terms of the GNU General Public License as published by the
00008 // Free Software Foundation; either version 2, or (at your option)
00009 // any later version.
00010 
00011 // This library is distributed in the hope that it will be useful,
00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014 // GNU General Public License for more details.
00015 
00016 // You should have received a copy of the GNU General Public License along
00017 // with this library; see the file COPYING.  If not, write to the Free
00018 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
00019 // USA.
00020 
00021 // As a special exception, you may use this file as part of a free software
00022 // library without restriction.  Specifically, if other files instantiate
00023 // templates or use macros or inline functions from this file, or you compile
00024 // this file and link it with other files to produce an executable, this
00025 // file does not by itself cause the resulting executable to be covered by
00026 // the GNU General Public License.  This exception does not however
00027 // invalidate any other reasons why the executable file might be covered by
00028 // the GNU General Public License.
00029 
00030 // Written by Gabriel Dos Reis <Gabriel.Dos-Reis@DPTMaths.ENS-Cachan.Fr>
00031 
00037 #ifndef _CPP_BITS_MASK_ARRAY_H
00038 #define _CPP_BITS_MASK_ARRAY_H 1
00039 
00040 #pragma GCC system_header
00041 
00042 namespace std {
00043 
00044     template <class _Tp> class mask_array
00045     { 
00046     public:
00047         typedef _Tp value_type;
00048     
00049         void operator=  (const valarray<_Tp>&) const;
00050         void operator*= (const valarray<_Tp>&) const;
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 _Tp&);
00061     
00062         //        ~mask_array ();
00063         
00064         template<class _Dom>
00065         void operator=  (const _Expr<_Dom,_Tp>&) const;
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 
00087     private:
00088         mask_array (_Array<_Tp>, size_t, _Array<bool>);
00089         friend class valarray<_Tp>;
00090         
00091         const size_t       _M_sz;
00092         const _Array<bool> _M_mask;
00093         const _Array<_Tp>   _M_array;
00094         
00095         mask_array (const mask_array&);
00096         
00097         // not implemented
00098         mask_array ();
00099         mask_array& operator= (const mask_array&);
00100     };
00101 
00102 
00103     template<typename _Tp>
00104     inline mask_array<_Tp>::mask_array (const mask_array<_Tp>& a)
00105             : _M_sz (a._M_sz), _M_mask (a._M_mask), _M_array (a._M_array) {}
00106 
00107     template<typename _Tp>
00108     inline 
00109     mask_array<_Tp>::mask_array (_Array<_Tp> __a, size_t __s, _Array<bool> __m)
00110             : _M_sz (__s), _M_mask (__m), _M_array (__a) {}
00111     
00112     //    template<typename _Tp>
00113     //    inline mask_array<_Tp>::~mask_array () {}
00114     
00115     template<typename _Tp>
00116     inline void
00117     mask_array<_Tp>::operator= (const _Tp& __t)
00118     { __valarray_fill (_M_array, _M_sz, _M_mask, __t); }
00119     
00120     template<typename _Tp>
00121     inline void
00122     mask_array<_Tp>::operator= (const valarray<_Tp>& __v) const
00123     { __valarray_copy (_Array<_Tp> (__v), __v.size (), _M_array, _M_mask); }
00124 
00125     template<typename _Tp>
00126     template<class E>
00127     inline void
00128     mask_array<_Tp>::operator= (const _Expr<E, _Tp>& __e) const
00129     { __valarray_copy (__e, __e.size (), _M_array, _M_mask); }
00130 
00131 #undef _DEFINE_VALARRAY_OPERATOR
00132 #define _DEFINE_VALARRAY_OPERATOR(op, name)             \
00133 template<typename _Tp>                          \
00134 inline void                             \
00135 mask_array<_Tp>::operator op##= (const valarray<_Tp>& __v) const    \
00136 {                                   \
00137   _Array_augmented_##name (_M_array, _M_mask,               \
00138                            _Array<_Tp> (__v), __v.size ());     \
00139 }                                   \
00140                                     \
00141 template<typename _Tp> template<class E>                \
00142 inline void                             \
00143 mask_array<_Tp>::operator op##= (const _Expr<E, _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(^, xor)
00154 _DEFINE_VALARRAY_OPERATOR(&, and)
00155 _DEFINE_VALARRAY_OPERATOR(|, 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:

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