631 lines
21 KiB
C++
631 lines
21 KiB
C++
// The template and inlines for the -*- C++ -*- internal _Array helper class.
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// Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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// USA.
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// As a special exception, you may use this file as part of a free software
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// library without restriction. Specifically, if other files instantiate
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// templates or use macros or inline functions from this file, or you compile
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// this file and link it with other files to produce an executable, this
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// file does not by itself cause the resulting executable to be covered by
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// the GNU General Public License. This exception does not however
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// invalidate any other reasons why the executable file might be covered by
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// the GNU General Public License.
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// Written by Gabriel Dos Reis <Gabriel.Dos-Reis@DPTMaths.ENS-Cachan.Fr>
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/** @file valarray_array.h
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* This is an internal header file, included by other library headers.
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* You should not attempt to use it directly.
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*/
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#ifndef _CPP_BITS_ARRAY_H
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#define _CPP_BITS_ARRAY_H 1
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#pragma GCC system_header
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#include <bits/c++config.h>
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#include <bits/cpp_type_traits.h>
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#include <cstdlib>
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#include <cstring>
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#include <new>
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namespace std
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{
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//
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// Helper functions on raw pointers
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//
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// We get memory by the old fashion way
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inline void*
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__valarray_get_memory(size_t __n)
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{ return operator new(__n); }
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template<typename _Tp>
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inline _Tp*__restrict__
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__valarray_get_storage(size_t __n)
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{
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return static_cast<_Tp*__restrict__>
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(__valarray_get_memory(__n * sizeof(_Tp)));
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}
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// Return memory to the system
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inline void
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__valarray_release_memory(void* __p)
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{ operator delete(__p); }
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// Turn a raw-memory into an array of _Tp filled with _Tp()
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// This is required in 'valarray<T> v(n);'
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template<typename _Tp, bool>
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struct _Array_default_ctor
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{
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// Please note that this isn't exception safe. But
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// valarrays aren't required to be exception safe.
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inline static void
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_S_do_it(_Tp* __restrict__ __b, _Tp* __restrict__ __e)
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{ while (__b != __e) new(__b++) _Tp(); }
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};
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template<typename _Tp>
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struct _Array_default_ctor<_Tp, true>
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{
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// For fundamental types, it suffices to say 'memset()'
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inline static void
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_S_do_it(_Tp* __restrict__ __b, _Tp* __restrict__ __e)
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{ memset(__b, 0, (__e - __b)*sizeof(_Tp)); }
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};
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template<typename _Tp>
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inline void
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__valarray_default_construct(_Tp* __restrict__ __b, _Tp* __restrict__ __e)
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{
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_Array_default_ctor<_Tp, __is_fundamental<_Tp>::_M_type>::
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_S_do_it(__b, __e);
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}
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// Turn a raw-memory into an array of _Tp filled with __t
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// This is the required in valarray<T> v(n, t). Also
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// used in valarray<>::resize().
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template<typename _Tp, bool>
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struct _Array_init_ctor
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{
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// Please note that this isn't exception safe. But
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// valarrays aren't required to be exception safe.
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inline static void
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_S_do_it(_Tp* __restrict__ __b, _Tp* __restrict__ __e, const _Tp __t)
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{ while (__b != __e) new(__b++) _Tp(__t); }
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};
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template<typename _Tp>
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struct _Array_init_ctor<_Tp, true>
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{
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inline static void
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_S_do_it(_Tp* __restrict__ __b, _Tp* __restrict__ __e, const _Tp __t)
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{ while (__b != __e) *__b++ = __t; }
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};
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template<typename _Tp>
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inline void
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__valarray_fill_construct(_Tp* __restrict__ __b, _Tp* __restrict__ __e,
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const _Tp __t)
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{
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_Array_init_ctor<_Tp, __is_fundamental<_Tp>::_M_type>::
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_S_do_it(__b, __e, __t);
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}
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//
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// copy-construct raw array [__o, *) from plain array [__b, __e)
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// We can't just say 'memcpy()'
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//
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template<typename _Tp, bool>
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struct _Array_copy_ctor
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{
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// Please note that this isn't exception safe. But
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// valarrays aren't required to be exception safe.
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inline static void
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_S_do_it(const _Tp* __restrict__ __b, const _Tp* __restrict__ __e,
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_Tp* __restrict__ __o)
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{ while (__b != __e) new(__o++) _Tp(*__b++); }
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};
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template<typename _Tp>
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struct _Array_copy_ctor<_Tp, true>
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{
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inline static void
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_S_do_it(const _Tp* __restrict__ __b, const _Tp* __restrict__ __e,
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_Tp* __restrict__ __o)
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{ memcpy(__o, __b, (__e - __b)*sizeof(_Tp)); }
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};
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template<typename _Tp>
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inline void
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__valarray_copy_construct(const _Tp* __restrict__ __b,
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const _Tp* __restrict__ __e,
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_Tp* __restrict__ __o)
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{
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_Array_copy_ctor<_Tp, __is_fundamental<_Tp>::_M_type>::
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_S_do_it(__b, __e, __o);
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}
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// copy-construct raw array [__o, *) from strided array __a[<__n : __s>]
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template<typename _Tp>
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inline void
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__valarray_copy_construct (const _Tp* __restrict__ __a, size_t __n,
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size_t __s, _Tp* __restrict__ __o)
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{
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if (__is_fundamental<_Tp>::_M_type)
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while (__n--) { *__o++ = *__a; __a += __s; }
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else
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while (__n--) { new(__o++) _Tp(*__a); __a += __s; }
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}
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// copy-construct raw array [__o, *) from indexed array __a[__i[<__n>]]
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template<typename _Tp>
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inline void
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__valarray_copy_construct (const _Tp* __restrict__ __a,
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const size_t* __restrict__ __i,
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_Tp* __restrict__ __o, size_t __n)
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{
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if (__is_fundamental<_Tp>::_M_type)
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while (__n--) *__o++ = __a[*__i++];
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else
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while (__n--) new (__o++) _Tp(__a[*__i++]);
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}
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// Do the necessary cleanup when we're done with arrays.
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template<typename _Tp>
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inline void
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__valarray_destroy_elements(_Tp* __restrict__ __b, _Tp* __restrict__ __e)
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{
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if (!__is_fundamental<_Tp>::_M_type)
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while (__b != __e) { __b->~_Tp(); ++__b; }
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}
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// Fill a plain array __a[<__n>] with __t
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template<typename _Tp>
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inline void
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__valarray_fill (_Tp* __restrict__ __a, size_t __n, const _Tp& __t)
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{ while (__n--) *__a++ = __t; }
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// fill strided array __a[<__n-1 : __s>] with __t
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template<typename _Tp>
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inline void
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__valarray_fill (_Tp* __restrict__ __a, size_t __n,
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size_t __s, const _Tp& __t)
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{ for (size_t __i=0; __i<__n; ++__i, __a+=__s) *__a = __t; }
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// fill indir ect array __a[__i[<__n>]] with __i
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template<typename _Tp>
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inline void
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__valarray_fill(_Tp* __restrict__ __a, const size_t* __restrict__ __i,
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size_t __n, const _Tp& __t)
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{ for (size_t __j=0; __j<__n; ++__j, ++__i) __a[*__i] = __t; }
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// copy plain array __a[<__n>] in __b[<__n>]
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// For non-fundamental types, it is wrong to say 'memcpy()'
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template<typename _Tp, bool>
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struct _Array_copier
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{
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inline static void
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_S_do_it(const _Tp* __restrict__ __a, size_t __n, _Tp* __restrict__ __b)
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{ while (__n--) *__b++ = *__a++; }
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};
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template<typename _Tp>
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struct _Array_copier<_Tp, true>
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{
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inline static void
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_S_do_it(const _Tp* __restrict__ __a, size_t __n, _Tp* __restrict__ __b)
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{ memcpy (__b, __a, __n * sizeof (_Tp)); }
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};
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// Copy a plain array __a[<__n>] into a play array __b[<>]
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template<typename _Tp>
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inline void
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__valarray_copy(const _Tp* __restrict__ __a, size_t __n,
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_Tp* __restrict__ __b)
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{
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_Array_copier<_Tp, __is_fundamental<_Tp>::_M_type>::
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_S_do_it(__a, __n, __b);
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}
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// Copy strided array __a[<__n : __s>] in plain __b[<__n>]
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template<typename _Tp>
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inline void
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__valarray_copy(const _Tp* __restrict__ __a, size_t __n, size_t __s,
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_Tp* __restrict__ __b)
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{ for (size_t __i=0; __i<__n; ++__i, ++__b, __a += __s) *__b = *__a; }
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// Copy a plain array __a[<__n>] into a strided array __b[<__n : __s>]
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template<typename _Tp>
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inline void
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__valarray_copy(const _Tp* __restrict__ __a, _Tp* __restrict__ __b,
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size_t __n, size_t __s)
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{ for (size_t __i=0; __i<__n; ++__i, ++__a, __b+=__s) *__b = *__a; }
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// Copy strided array __src[<__n : __s1>] into another
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// strided array __dst[< : __s2>]. Their sizes must match.
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template<typename _Tp>
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inline void
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__valarray_copy(const _Tp* __restrict__ __src, size_t __n, size_t __s1,
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_Tp* __restrict__ __dst, size_t __s2)
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{
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for (size_t __i = 0; __i < __n; ++__i)
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__dst[__i * __s2] = __src [ __i * __s1];
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}
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// Copy an indexed array __a[__i[<__n>]] in plain array __b[<__n>]
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template<typename _Tp>
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inline void
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__valarray_copy (const _Tp* __restrict__ __a,
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const size_t* __restrict__ __i,
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_Tp* __restrict__ __b, size_t __n)
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{ for (size_t __j=0; __j<__n; ++__j, ++__b, ++__i) *__b = __a[*__i]; }
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// Copy a plain array __a[<__n>] in an indexed array __b[__i[<__n>]]
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template<typename _Tp>
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inline void
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__valarray_copy (const _Tp* __restrict__ __a, size_t __n,
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_Tp* __restrict__ __b, const size_t* __restrict__ __i)
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{ for (size_t __j=0; __j<__n; ++__j, ++__a, ++__i) __b[*__i] = *__a; }
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// Copy the __n first elements of an indexed array __src[<__i>] into
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// another indexed array __dst[<__j>].
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template<typename _Tp>
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inline void
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__valarray_copy(const _Tp* __restrict__ __src, size_t __n,
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const size_t* __restrict__ __i,
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_Tp* __restrict__ __dst, const size_t* __restrict__ __j)
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{
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for (size_t __k = 0; __k < __n; ++__k)
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__dst[*__j++] = __src[*__i++];
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}
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//
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// Compute the sum of elements in range [__f, __l)
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// This is a naive algorithm. It suffers from cancelling.
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// In the future try to specialize
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// for _Tp = float, double, long double using a more accurate
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// algorithm.
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//
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template<typename _Tp>
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inline _Tp
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__valarray_sum(const _Tp* __restrict__ __f, const _Tp* __restrict__ __l)
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{
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_Tp __r = _Tp();
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while (__f != __l) __r += *__f++;
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return __r;
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}
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// Compute the product of all elements in range [__f, __l)
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template<typename _Tp>
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inline _Tp
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__valarray_product(const _Tp* __restrict__ __f,
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const _Tp* __restrict__ __l)
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{
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_Tp __r = _Tp(1);
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while (__f != __l) __r = __r * *__f++;
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return __r;
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}
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// Compute the min/max of an array-expression
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template<typename _Ta>
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inline typename _Ta::value_type
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__valarray_min(const _Ta& __a)
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{
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size_t __s = __a.size();
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typedef typename _Ta::value_type _Value_type;
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_Value_type __r = __s == 0 ? _Value_type() : __a[0];
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for (size_t __i = 1; __i < __s; ++__i)
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{
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_Value_type __t = __a[__i];
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if (__t < __r)
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__r = __t;
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}
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return __r;
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}
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template<typename _Ta>
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inline typename _Ta::value_type
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__valarray_max(const _Ta& __a)
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{
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size_t __s = __a.size();
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typedef typename _Ta::value_type _Value_type;
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_Value_type __r = __s == 0 ? _Value_type() : __a[0];
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for (size_t __i = 1; __i < __s; ++__i)
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{
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_Value_type __t = __a[__i];
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if (__t > __r)
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__r = __t;
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}
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return __r;
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}
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//
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// Helper class _Array, first layer of valarray abstraction.
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// All operations on valarray should be forwarded to this class
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// whenever possible. -- gdr
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//
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template<typename _Tp>
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struct _Array
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{
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explicit _Array (size_t);
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explicit _Array (_Tp* const __restrict__);
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explicit _Array (const valarray<_Tp>&);
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_Array (const _Tp* __restrict__, size_t);
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_Tp* begin () const;
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_Tp* const __restrict__ _M_data;
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};
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template<typename _Tp>
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inline void
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__valarray_fill (_Array<_Tp> __a, size_t __n, const _Tp& __t)
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{ __valarray_fill (__a._M_data, __n, __t); }
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template<typename _Tp>
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inline void
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__valarray_fill (_Array<_Tp> __a, size_t __n, size_t __s, const _Tp& __t)
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{ __valarray_fill (__a._M_data, __n, __s, __t); }
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template<typename _Tp>
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inline void
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__valarray_fill (_Array<_Tp> __a, _Array<size_t> __i,
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size_t __n, const _Tp& __t)
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{ __valarray_fill (__a._M_data, __i._M_data, __n, __t); }
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// Copy a plain array __a[<__n>] into a play array __b[<>]
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template<typename _Tp>
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inline void
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__valarray_copy(_Array<_Tp> __a, size_t __n, _Array<_Tp> __b)
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{ __valarray_copy(__a._M_data, __n, __b._M_data); }
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// Copy strided array __a[<__n : __s>] in plain __b[<__n>]
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template<typename _Tp>
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inline void
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__valarray_copy(_Array<_Tp> __a, size_t __n, size_t __s, _Array<_Tp> __b)
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{ __valarray_copy(__a._M_data, __n, __s, __b._M_data); }
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// Copy a plain array __a[<__n>] into a strided array __b[<__n : __s>]
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template<typename _Tp>
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inline void
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__valarray_copy(_Array<_Tp> __a, _Array<_Tp> __b, size_t __n, size_t __s)
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{ __valarray_copy(__a._M_data, __b._M_data, __n, __s); }
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// Copy strided array __src[<__n : __s1>] into another
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// strided array __dst[< : __s2>]. Their sizes must match.
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template<typename _Tp>
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inline void
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__valarray_copy(_Array<_Tp> __a, size_t __n, size_t __s1,
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_Array<_Tp> __b, size_t __s2)
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{ __valarray_copy(__a._M_data, __n, __s1, __b._M_data, __s2); }
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// Copy an indexed array __a[__i[<__n>]] in plain array __b[<__n>]
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template<typename _Tp>
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inline void
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__valarray_copy(_Array<_Tp> __a, _Array<size_t> __i,
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_Array<_Tp> __b, size_t __n)
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{ __valarray_copy(__a._M_data, __i._M_data, __b._M_data, __n); }
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// Copy a plain array __a[<__n>] in an indexed array __b[__i[<__n>]]
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template<typename _Tp>
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inline void
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__valarray_copy(_Array<_Tp> __a, size_t __n, _Array<_Tp> __b,
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_Array<size_t> __i)
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{ __valarray_copy(__a._M_data, __n, __b._M_data, __i._M_data); }
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// Copy the __n first elements of an indexed array __src[<__i>] into
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// another indexed array __dst[<__j>].
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template<typename _Tp>
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inline void
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__valarray_copy(_Array<_Tp> __src, size_t __n, _Array<size_t> __i,
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_Array<_Tp> __dst, _Array<size_t> __j)
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{
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__valarray_copy(__src._M_data, __n, __i._M_data,
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__dst._M_data, __j._M_data);
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}
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template<typename _Tp>
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inline
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_Array<_Tp>::_Array (size_t __n)
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: _M_data(__valarray_get_storage<_Tp>(__n))
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{ __valarray_default_construct(_M_data, _M_data + __n); }
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template<typename _Tp>
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inline
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_Array<_Tp>::_Array (_Tp* const __restrict__ __p) : _M_data (__p) {}
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template<typename _Tp>
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inline _Array<_Tp>::_Array (const valarray<_Tp>& __v)
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: _M_data (__v._M_data) {}
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template<typename _Tp>
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inline
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_Array<_Tp>::_Array (const _Tp* __restrict__ __b, size_t __s)
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: _M_data(__valarray_get_storage<_Tp>(__s))
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{ __valarray_copy_construct(__b, __s, _M_data); }
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template<typename _Tp>
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inline _Tp*
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_Array<_Tp>::begin () const
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{ return _M_data; }
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#define _DEFINE_ARRAY_FUNCTION(_Op, _Name) \
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template<typename _Tp> \
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inline void \
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_Array_augmented_##_Name (_Array<_Tp> __a, size_t __n, const _Tp& __t) \
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{ \
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for (_Tp* __p=__a._M_data; __p<__a._M_data+__n; ++__p) \
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*__p _Op##= __t; \
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} \
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\
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template<typename _Tp> \
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inline void \
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_Array_augmented_##_Name (_Array<_Tp> __a, size_t __n, _Array<_Tp> __b) \
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{ \
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_Tp* __p = __a._M_data; \
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for (_Tp* __q=__b._M_data; __q<__b._M_data+__n; ++__p, ++__q) \
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*__p _Op##= *__q; \
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} \
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\
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template<typename _Tp, class _Dom> \
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void \
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_Array_augmented_##_Name (_Array<_Tp> __a, \
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const _Expr<_Dom,_Tp>& __e, size_t __n) \
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{ \
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_Tp* __p (__a._M_data); \
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for (size_t __i=0; __i<__n; ++__i, ++__p) *__p _Op##= __e[__i]; \
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} \
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\
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template<typename _Tp> \
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inline void \
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_Array_augmented_##_Name (_Array<_Tp> __a, size_t __n, size_t __s, \
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_Array<_Tp> __b) \
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{ \
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_Tp* __q (__b._M_data); \
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for (_Tp* __p=__a._M_data; __p<__a._M_data+__s*__n; __p+=__s, ++__q) \
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*__p _Op##= *__q; \
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} \
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\
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template<typename _Tp> \
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inline void \
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_Array_augmented_##_Name (_Array<_Tp> __a, _Array<_Tp> __b, \
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size_t __n, size_t __s) \
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{ \
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_Tp* __q (__b._M_data); \
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for (_Tp* __p=__a._M_data; __p<__a._M_data+__n; ++__p, __q+=__s) \
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*__p _Op##= *__q; \
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} \
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\
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template<typename _Tp, class _Dom> \
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void \
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_Array_augmented_##_Name (_Array<_Tp> __a, size_t __s, \
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const _Expr<_Dom,_Tp>& __e, size_t __n) \
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{ \
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_Tp* __p (__a._M_data); \
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for (size_t __i=0; __i<__n; ++__i, __p+=__s) *__p _Op##= __e[__i]; \
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} \
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\
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template<typename _Tp> \
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inline void \
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_Array_augmented_##_Name (_Array<_Tp> __a, _Array<size_t> __i, \
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_Array<_Tp> __b, size_t __n) \
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{ \
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_Tp* __q (__b._M_data); \
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for (size_t* __j=__i._M_data; __j<__i._M_data+__n; ++__j, ++__q) \
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__a._M_data[*__j] _Op##= *__q; \
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} \
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\
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|
template<typename _Tp> \
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|
inline void \
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|
_Array_augmented_##_Name (_Array<_Tp> __a, size_t __n, \
|
|
_Array<_Tp> __b, _Array<size_t> __i) \
|
|
{ \
|
|
_Tp* __p (__a._M_data); \
|
|
for (size_t* __j=__i._M_data; __j<__i._M_data+__n; ++__j, ++__p) \
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|
*__p _Op##= __b._M_data[*__j]; \
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|
} \
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|
\
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|
template<typename _Tp, class _Dom> \
|
|
void \
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|
_Array_augmented_##_Name (_Array<_Tp> __a, _Array<size_t> __i, \
|
|
const _Expr<_Dom, _Tp>& __e, size_t __n) \
|
|
{ \
|
|
size_t* __j (__i._M_data); \
|
|
for (size_t __k=0; __k<__n; ++__k, ++__j) \
|
|
__a._M_data[*__j] _Op##= __e[__k]; \
|
|
} \
|
|
\
|
|
template<typename _Tp> \
|
|
void \
|
|
_Array_augmented_##_Name (_Array<_Tp> __a, _Array<bool> __m, \
|
|
_Array<_Tp> __b, size_t __n) \
|
|
{ \
|
|
bool* ok (__m._M_data); \
|
|
_Tp* __p (__a._M_data); \
|
|
for (_Tp* __q=__b._M_data; __q<__b._M_data+__n; ++__q, ++ok, ++__p) { \
|
|
while (! *ok) { \
|
|
++ok; \
|
|
++__p; \
|
|
} \
|
|
*__p _Op##= *__q; \
|
|
} \
|
|
} \
|
|
\
|
|
template<typename _Tp> \
|
|
void \
|
|
_Array_augmented_##_Name (_Array<_Tp> __a, size_t __n, \
|
|
_Array<_Tp> __b, _Array<bool> __m) \
|
|
{ \
|
|
bool* ok (__m._M_data); \
|
|
_Tp* __q (__b._M_data); \
|
|
for (_Tp* __p=__a._M_data; __p<__a._M_data+__n; ++__p, ++ok, ++__q) { \
|
|
while (! *ok) { \
|
|
++ok; \
|
|
++__q; \
|
|
} \
|
|
*__p _Op##= *__q; \
|
|
} \
|
|
} \
|
|
\
|
|
template<typename _Tp, class _Dom> \
|
|
void \
|
|
_Array_augmented_##_Name (_Array<_Tp> __a, _Array<bool> __m, \
|
|
const _Expr<_Dom, _Tp>& __e, size_t __n) \
|
|
{ \
|
|
bool* ok(__m._M_data); \
|
|
_Tp* __p (__a._M_data); \
|
|
for (size_t __i=0; __i<__n; ++__i, ++ok, ++__p) { \
|
|
while (! *ok) { \
|
|
++ok; \
|
|
++__p; \
|
|
} \
|
|
*__p _Op##= __e[__i]; \
|
|
} \
|
|
}
|
|
|
|
_DEFINE_ARRAY_FUNCTION(+, plus)
|
|
_DEFINE_ARRAY_FUNCTION(-, minus)
|
|
_DEFINE_ARRAY_FUNCTION(*, multiplies)
|
|
_DEFINE_ARRAY_FUNCTION(/, divides)
|
|
_DEFINE_ARRAY_FUNCTION(%, modulus)
|
|
_DEFINE_ARRAY_FUNCTION(^, xor)
|
|
_DEFINE_ARRAY_FUNCTION(|, or)
|
|
_DEFINE_ARRAY_FUNCTION(&, and)
|
|
_DEFINE_ARRAY_FUNCTION(<<, shift_left)
|
|
_DEFINE_ARRAY_FUNCTION(>>, shift_right)
|
|
|
|
#undef _DEFINE_VALARRAY_FUNCTION
|
|
|
|
} // std::
|
|
|
|
#ifdef _GLIBCPP_NO_TEMPLATE_EXPORT
|
|
# define export
|
|
# include <bits/valarray_array.tcc>
|
|
#endif
|
|
|
|
#endif /* _CPP_BITS_ARRAY_H */
|
|
|
|
// Local Variables:
|
|
// mode:c++
|
|
// End:
|