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 
00032 /** @file gslice_array.h
00033  *  This is an internal header file, included by other library headers.
00034  *  You should not attempt to use it directly.
00035  */
00036 
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>
00045     class gslice_array
00046     {
00047     public:
00048       typedef _Tp value_type;
00049 
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 valarray<_Tp>&) const;
00061       void operator=(const _Tp&) const;
00062 
00063       template<class _Dom>
00064         void operator=(const _Expr<_Dom,_Tp>&) const;
00065       template<class _Dom>
00066         void operator*=(const _Expr<_Dom,_Tp>&) const;
00067       template<class _Dom>
00068         void operator/=(const _Expr<_Dom,_Tp>&) const;
00069       template<class _Dom>
00070         void operator%=(const _Expr<_Dom,_Tp>&) const;
00071       template<class _Dom>
00072         void operator+=(const _Expr<_Dom,_Tp>&) const;
00073       template<class _Dom>
00074         void operator-=(const _Expr<_Dom,_Tp>&) const;
00075       template<class _Dom>
00076         void operator^=(const _Expr<_Dom,_Tp>&) const;
00077       template<class _Dom>
00078         void operator&=(const _Expr<_Dom,_Tp>&) const;
00079       template<class _Dom>
00080         void operator|=(const _Expr<_Dom,_Tp>&) const;
00081       template<class _Dom>
00082         void operator<<=(const _Expr<_Dom,_Tp>&) const;
00083       template<class _Dom>
00084         void operator>>=(const _Expr<_Dom,_Tp>&) const;
00085         
00086     private:
00087       _Array<_Tp>    _M_array;
00088       const valarray<size_t>& _M_index;
00089         
00090       friend class valarray<_Tp>;
00091       
00092       gslice_array(_Array<_Tp>, const valarray<size_t>&);
00093 
00094       // this constructor needs to be implemented.
00095       gslice_array(const gslice_array&);
00096 
00097       // not implemented
00098       gslice_array();
00099       gslice_array& operator= (const gslice_array&);
00100     };
00101 
00102   template<typename _Tp>
00103     inline
00104     gslice_array<_Tp>::gslice_array(_Array<_Tp> __a,
00105                     const valarray<size_t>& __i)
00106       : _M_array(__a), _M_index(__i) {}
00107 
00108 
00109   template<typename _Tp>
00110     inline
00111     gslice_array<_Tp>::gslice_array(const gslice_array<_Tp>& __a)
00112       : _M_array(__a._M_array), _M_index(__a._M_index) {}
00113 
00114     
00115   template<typename _Tp>
00116     inline void
00117     gslice_array<_Tp>::operator=(const _Tp& __t) const
00118     { 
00119       __valarray_fill(_M_array, _Array<size_t>(_M_index),
00120               _M_index.size(), __t); 
00121     }
00122 
00123   template<typename _Tp>
00124     inline void
00125     gslice_array<_Tp>::operator=(const valarray<_Tp>& __v) const
00126     {
00127       __valarray_copy(_Array<_Tp>(__v), __v.size(),
00128               _M_array, _Array<size_t>(_M_index));
00129     }
00130 
00131   template<typename _Tp>
00132     template<class _Dom>
00133       inline void
00134       gslice_array<_Tp>::operator=(const _Expr<_Dom, _Tp>& __e) const
00135       {
00136     __valarray_copy (__e, _M_index.size(), _M_array,
00137              _Array<size_t>(_M_index));
00138       }
00139 
00140 #undef _DEFINE_VALARRAY_OPERATOR
00141 #define _DEFINE_VALARRAY_OPERATOR(_Op, _Name)               \
00142   template<typename _Tp>                        \
00143     inline void                             \
00144     gslice_array<_Tp>::operator _Op##=(const valarray<_Tp>& __v) const  \
00145     {                                   \
00146       _Array_augmented_##_Name(_M_array, _Array<size_t>(_M_index),  \
00147                   _Array<_Tp>(__v), __v.size());        \
00148     }                                   \
00149                                     \
00150   template<typename _Tp>                                                \
00151     template<class _Dom>                                    \
00152       inline void                           \
00153       gslice_array<_Tp>::operator _Op##= (const _Expr<_Dom, _Tp>& __e) const\
00154       {                                 \
00155     _Array_augmented_##_Name(_M_array, _Array<size_t>(_M_index), __e,\
00156                  _M_index.size());          \
00157       }
00158 
00159 _DEFINE_VALARRAY_OPERATOR(*, __multiplies)
00160 _DEFINE_VALARRAY_OPERATOR(/, __divides)    
00161 _DEFINE_VALARRAY_OPERATOR(%, __modulus)
00162 _DEFINE_VALARRAY_OPERATOR(+, __plus)    
00163 _DEFINE_VALARRAY_OPERATOR(-, __minus)
00164 _DEFINE_VALARRAY_OPERATOR(^, __bitwise_xor)
00165 _DEFINE_VALARRAY_OPERATOR(&, __bitwise_and)
00166 _DEFINE_VALARRAY_OPERATOR(|, __bitwise_or)
00167 _DEFINE_VALARRAY_OPERATOR(<<, __shift_left)
00168 _DEFINE_VALARRAY_OPERATOR(>>, __shift_right)
00169 
00170 #undef _DEFINE_VALARRAY_OPERATOR
00171 
00172 } // std::
00173 
00174 #endif /* _CPP_BITS_GSLICE_ARRAY */
00175 
00176 // Local Variables:
00177 // mode:c++
00178 // End:

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