# slice_array.h

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    00001 // The template and inlines for the -*- C++ -*- slice_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_SLICE_ARRAY_H
    00038 #define _CPP_BITS_SLICE_ARRAY_H 1
    00039
    00040 #pragma GCC system_header
    00041
    00042 namespace std
    00043 {
    00044
    00045     template<typename _Tp>
    00046     class slice_array
    00047     {
    00048     public:
    00049         typedef _Tp value_type;
    00050
    00051       // This constructor is implemented since we need to return a value.
    00052       slice_array (const slice_array&);
    00053
    00054       // This operator must be public.  See DR-253.
    00055       slice_array& operator= (const slice_array&);
    00056
    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 valarray<_Tp>&) const;
    00063         void operator^=  (const valarray<_Tp>&) const;
    00064         void operator&=  (const valarray<_Tp>&) const;
    00065         void operator|=  (const valarray<_Tp>&) const;
    00066         void operator<<= (const valarray<_Tp>&) const;
    00067         void operator>>= (const valarray<_Tp>&) const;
    00068         void operator= (const _Tp &);
    00069         //        ~slice_array ();
    00070
    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         template<class _Dom>
    00086         void operator&=  (const _Expr<_Dom,_Tp>&) const;
    00087         template<class _Dom>
    00088         void operator|=  (const _Expr<_Dom,_Tp>&) const;
    00089         template<class _Dom>
    00090         void operator<<= (const _Expr<_Dom,_Tp>&) const;
    00091         template<class _Dom>
    00092         void operator>>= (const _Expr<_Dom,_Tp>&) const;
    00093
    00094     private:
    00095         friend class valarray<_Tp>;
    00096         slice_array(_Array<_Tp>, const slice&);
    00097
    00098         const size_t     _M_sz;
    00099         const size_t     _M_stride;
    00100         const _Array<_Tp> _M_array;
    00101
    00102         // not implemented
    00103         slice_array ();
    00104     };
    00105
    00106     template<typename _Tp>
    00107     inline slice_array<_Tp>::slice_array (_Array<_Tp> __a, const slice& __s)
    00108             : _M_sz (__s.size ()), _M_stride (__s.stride ()),
    00109               _M_array (__a.begin () + __s.start ()) {}
    00110
    00111
    00112     template<typename _Tp>
    00113     inline slice_array<_Tp>::slice_array(const slice_array<_Tp>& a)
    00114             : _M_sz(a._M_sz), _M_stride(a._M_stride), _M_array(a._M_array) {}
    00115
    00116     //    template<typename _Tp>
    00117     //    inline slice_array<_Tp>::~slice_array () {}
    00118
    00119   template<typename _Tp>
    00120   inline slice_array<_Tp>&
    00121   slice_array<_Tp>::operator=(const slice_array<_Tp>& __a)
    00122   {
    00123     __valarray_copy(_M_array, _M_sz, _M_stride, __a._M_array, __a._M_stride);
    00124     return *this;
    00125   }
    00126
    00127
    00128     template<typename _Tp>
    00129     inline void
    00130     slice_array<_Tp>::operator= (const _Tp& __t)
    00131     { __valarray_fill (_M_array, _M_sz, _M_stride, __t); }
    00132
    00133     template<typename _Tp>
    00134     inline void
    00135     slice_array<_Tp>::operator= (const valarray<_Tp>& __v) const
    00136     { __valarray_copy (_Array<_Tp> (__v), _M_array, _M_sz, _M_stride); }
    00137
    00138     template<typename _Tp>
    00139     template<class _Dom>
    00140     inline void
    00141     slice_array<_Tp>::operator= (const _Expr<_Dom,_Tp>& __e) const
    00142     { __valarray_copy (__e, _M_sz, _M_array, _M_stride); }
    00143
    00144 #undef _DEFINE_VALARRAY_OPERATOR
    00145 #define _DEFINE_VALARRAY_OPERATOR(op, name)             \
    00146 template<typename _Tp>                          \
    00147 inline void                             \
    00148 slice_array<_Tp>::operator op##= (const valarray<_Tp>& __v) const   \
    00149 {                                   \
    00150   _Array_augmented_##name (_M_array, _M_sz, _M_stride, _Array<_Tp> (__v));\
    00151 }                                   \
    00152                                     \
    00153 template<typename _Tp> template<class _Dom>             \
    00154 inline void                             \
    00155 slice_array<_Tp>::operator op##= (const _Expr<_Dom,_Tp>& __e) const \
    00156 {                                   \
    00157     _Array_augmented_##name (_M_array, _M_stride, __e, _M_sz);      \
    00158 }
    00159
    00160
    00161 _DEFINE_VALARRAY_OPERATOR(*, multiplies)
    00162 _DEFINE_VALARRAY_OPERATOR(/, divides)
    00163 _DEFINE_VALARRAY_OPERATOR(%, modulus)
    00164 _DEFINE_VALARRAY_OPERATOR(+, plus)
    00165 _DEFINE_VALARRAY_OPERATOR(-, minus)
    00166 _DEFINE_VALARRAY_OPERATOR(^, xor)
    00167 _DEFINE_VALARRAY_OPERATOR(&, and)
    00168 _DEFINE_VALARRAY_OPERATOR(|, or)
    00169 _DEFINE_VALARRAY_OPERATOR(<<, shift_left)
    00170 _DEFINE_VALARRAY_OPERATOR(>>, shift_right)
    00171
    00172 #undef _DEFINE_VALARRAY_OPERATOR
    00173
    00174 } // std::
    00175
    00176 #endif /* _CPP_BITS_SLICE_ARRAY_H */
    00177
    00178 // Local Variables:
    00179 // mode:c++
    00180 // End: