gslice_array.h

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00001 // The template and inlines for the -*- C++ -*- gslice_array class.
00002 
00003 // Copyright (C) 1997, 1998, 1999, 2000, 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_GSLICE_ARRAY
00038 #define _CPP_BITS_GSLICE_ARRAY 1
00039 
00040 #pragma GCC system_header
00041 
00042 namespace std {
00043 
00044     template<typename _Tp> class gslice_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         template<class _Dom>
00063         void operator= (const _Expr<_Dom,_Tp>&) const;
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         
00085     private:
00086         _Array<_Tp>    _M_array;
00087         const valarray<size_t>& _M_index;
00088         
00089         friend class valarray<_Tp>;
00090         
00091         gslice_array (_Array<_Tp>, const valarray<size_t>&);
00092 
00093         // this constructor needs to be implemented.
00094         gslice_array (const gslice_array&);
00095 
00096         // not implemented
00097         gslice_array();
00098         gslice_array& operator= (const gslice_array&);
00099     };
00100 
00101     template<typename _Tp>
00102     inline
00103     gslice_array<_Tp>::gslice_array (_Array<_Tp> __a,
00104                                      const valarray<size_t>& __i)
00105             : _M_array (__a), _M_index (__i) {}
00106 
00107 
00108     template<typename _Tp>
00109     inline
00110     gslice_array<_Tp>::gslice_array (const gslice_array<_Tp>& __a)
00111             : _M_array (__a._M_array), _M_index (__a._M_index) {}
00112 
00113     
00114     template<typename _Tp>
00115     inline void
00116     gslice_array<_Tp>::operator= (const _Tp& __t) 
00117     { 
00118         __valarray_fill (_M_array, _Array<size_t>(_M_index),
00119                          _M_index.size(), __t); 
00120     }
00121 
00122     template<typename _Tp>
00123     inline void
00124     gslice_array<_Tp>::operator= (const valarray<_Tp>& __v) const
00125     {
00126         __valarray_copy (_Array<_Tp> (__v), __v.size (),
00127                          _M_array, _Array<size_t>(_M_index));
00128     }
00129 
00130     template<typename _Tp>
00131     template<class E>
00132     inline void
00133     gslice_array<_Tp>::operator= (const _Expr<E, _Tp>& __e) const
00134     {
00135         __valarray_copy (__e, _M_index.size(), _M_array,
00136                          _Array<size_t>(_M_index));
00137     }
00138 
00139 #undef _DEFINE_VALARRAY_OPERATOR
00140 #define _DEFINE_VALARRAY_OPERATOR(op, name)             \
00141 template<typename _Tp>                          \
00142 inline void                             \
00143 gslice_array<_Tp>::operator op##= (const valarray<_Tp>& __v) const  \
00144 {                                   \
00145     _Array_augmented_##name (_M_array, _Array<size_t>(_M_index),    \
00146                               _Array<_Tp> (__v), __v.size ());      \
00147 }                                   \
00148                                     \
00149 template<typename _Tp> template<class E>                    \
00150 inline void                                 \
00151 gslice_array<_Tp>::operator op##= (const _Expr<E, _Tp>& __e) const  \
00152 {                                   \
00153     _Array_augmented_##name (_M_array, _Array<size_t>(_M_index), __e,   \
00154                               _M_index.size());             \
00155 }
00156 
00157 _DEFINE_VALARRAY_OPERATOR(*, multiplies)
00158 _DEFINE_VALARRAY_OPERATOR(/, divides)    
00159 _DEFINE_VALARRAY_OPERATOR(%, modulus)
00160 _DEFINE_VALARRAY_OPERATOR(+, plus)    
00161 _DEFINE_VALARRAY_OPERATOR(-, minus)
00162 _DEFINE_VALARRAY_OPERATOR(^, xor)
00163 _DEFINE_VALARRAY_OPERATOR(&, and)
00164 _DEFINE_VALARRAY_OPERATOR(|, or)
00165 _DEFINE_VALARRAY_OPERATOR(<<, shift_left)
00166 _DEFINE_VALARRAY_OPERATOR(>>, shift_right)
00167 
00168 #undef _DEFINE_VALARRAY_OPERATOR
00169 
00170 } // std::
00171 
00172 #endif /* _CPP_BITS_GSLICE_ARRAY */
00173 
00174 // Local Variables:
00175 // mode:c++
00176 // End:

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