1// The template and inlines for the -*- C++ -*- internal _Array helper class. 2 3// Copyright (C) 1997-1999 Cygnus Solutions 4// 5// This file is part of the GNU ISO C++ Library. This library is free 6// software; you can redistribute it and/or modify it under the 7// terms of the GNU General Public License as published by the 8// Free Software Foundation; either version 2, or (at your option) 9// any later version. 10 11// This library is distributed in the hope that it will be useful, 12// but WITHOUT ANY WARRANTY; without even the implied warranty of 13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14// GNU General Public License for more details. 15 16// You should have received a copy of the GNU General Public License along 17// with this library; see the file COPYING. If not, write to the Free 18// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 19// USA. 20 21// As a special exception, you may use this file as part of a free software 22// library without restriction. Specifically, if other files instantiate 23// templates or use macros or inline functions from this file, or you compile 24// this file and link it with other files to produce an executable, this 25// file does not by itself cause the resulting executable to be covered by 26// the GNU General Public License. This exception does not however 27// invalidate any other reasons why the executable file might be covered by 28// the GNU General Public License. 29 30// Written by Gabriel Dos Reis <Gabriel.Dos-Reis@DPTMaths.ENS-Cachan.Fr> 31 32#ifndef __VALARRAY_ARRAY__ 33#define __VALARRAY_ARRAY__ 34 35#include <cstdlib> 36#include <cstring> 37 38extern "C++" { 39 40// 41// Helper functions on raw pointers 42// 43 44// fill plain array __a[<__n>] with __t 45template<typename _Tp> 46inline void 47__valarray_fill (_Tp* __restrict__ __a, size_t __n, const _Tp& __t) 48{ while (__n--) *__a++ = __t; } 49 50// fill strided array __a[<__n-1 : __s>] with __t 51template<typename _Tp> 52inline void 53__valarray_fill (_Tp* __restrict__ __a, size_t __n, 54 size_t __s, const _Tp& __t) 55{ for (size_t __i=0; __i<__n; ++__i, __a+=__s) *__a = __t; } 56 57// fill indirect array __a[__i[<__n>]] with __i 58template<typename _Tp> 59inline void 60__valarray_fill(_Tp* __restrict__ __a, const size_t* __restrict__ __i, 61 size_t __n, const _Tp& __t) 62{ for (size_t __j=0; __j<__n; ++__j, ++__i) __a[*__i] = __t; } 63 64// copy plain array __a[<__n>] in __b[<__n>] 65template<typename _Tp> 66inline void 67__valarray_copy (const _Tp* __restrict__ __a, size_t __n, 68 _Tp* __restrict__ __b) 69{ memcpy (__b, __a, __n * sizeof(_Tp)); } 70 71// copy strided array __a[<__n : __s>] in plain __b[<__n>] 72template<typename _Tp> 73inline void 74__valarray_copy (const _Tp* __restrict__ __a, size_t __n, size_t __s, 75 _Tp* __restrict__ __b) 76{ for (size_t __i=0; __i<__n; ++__i, ++__b, __a += __s) *__b = *__a; } 77 78// copy plain __a[<__n>] in strided __b[<__n : __s>] 79template<typename _Tp> 80inline void 81__valarray_copy (const _Tp* __restrict__ __a, _Tp* __restrict__ __b, 82 size_t __n, size_t __s) 83{ for (size_t __i=0; __i<__n; ++__i, ++__a, __b+=__s) *__b = *__a; } 84 85// copy indexed __a[__i[<__n>]] in plain __b[<__n>] 86template<typename _Tp> 87inline void 88__valarray_copy (const _Tp* __restrict__ __a, 89 const size_t* __restrict__ __i, 90 _Tp* __restrict__ __b, size_t __n) 91{ for (size_t __j=0; __j<__n; ++__j, ++__b, ++__i) *__b = __a[*__i]; } 92 93// copy plain __a[<__n>] in indexed __b[__i[<__n>]] 94template<typename _Tp> 95inline void 96__valarray_copy (const _Tp* __restrict__ __a, size_t __n, 97 _Tp* __restrict__ __b, const size_t* __restrict__ __i) 98{ for (size_t __j=0; __j<__n; ++__j, ++__a, ++__i) __b[*__i] = *__a; } 99 100// 101// Helper class _Array, first layer of valarray abstraction. 102// All operations on valarray should be forwarded to this class 103// whenever possible. -- gdr 104// 105 106template<typename _Tp> struct _Array { 107 108 explicit _Array (size_t); 109 explicit _Array (_Tp* const __restrict__); 110 explicit _Array (const valarray<_Tp>&); 111 _Array (const _Tp* __restrict__, size_t); 112 113 void free_data() const; 114 _Tp* begin () const; 115 116 _Tp* const __restrict__ _M_data; 117}; 118 119template<typename _Tp> 120inline void 121__valarray_fill (_Array<_Tp> __a, size_t __n, const _Tp& __t) 122{ __valarray_fill (__a._M_data, __n, __t); } 123 124template<typename _Tp> 125inline void 126__valarray_fill (_Array<_Tp> __a, size_t __n, size_t __s, const _Tp& __t) 127{ __valarray_fill (__a._M_data, __n, __s, __t); } 128 129template<typename _Tp> 130inline void 131__valarray_fill (_Array<_Tp> __a, _Array<size_t> __i, 132 size_t __n, const _Tp& __t) 133{ __valarray_fill (__a._M_data, __i._M_data, __n, __t); } 134 135template<typename _Tp> 136inline void 137__valarray_copy (_Array<_Tp> __a, size_t __n, _Array<_Tp> __b) 138{ __valarray_copy (__a._M_data, __n, __b._M_data); } 139 140template<typename _Tp> 141inline void 142__valarray_copy (_Array<_Tp> __a, size_t __n, size_t __s, _Array<_Tp> __b) 143{ __valarray_copy(__a._M_data, __n, __s, __b._M_data); } 144 145template<typename _Tp> 146inline void 147__valarray_copy (_Array<_Tp> __a, _Array<_Tp> __b, size_t __n, size_t __s) 148{ __valarray_copy (__a._M_data, __b._M_data, __n, __s); } 149 150template<typename _Tp> 151inline void 152__valarray_copy (_Array<_Tp> __a, _Array<size_t> __i, 153 _Array<_Tp> __b, size_t __n) 154{ __valarray_copy (__a._M_data, __i._M_data, __b._M_data, __n); } 155 156template<typename _Tp> 157inline void 158__valarray_copy (_Array<_Tp> __a, size_t __n, _Array<_Tp> __b, 159 _Array<size_t> __i) 160{ __valarray_copy (__a._M_data, __n, __b._M_data, __i._M_data); } 161 162template<typename _Tp> 163inline 164_Array<_Tp>::_Array (size_t __n) : _M_data (new _Tp[__n]) {} 165 166template<typename _Tp> 167inline 168_Array<_Tp>::_Array (_Tp* const __restrict__ __p) : _M_data (__p) {} 169 170template<typename _Tp> 171inline _Array<_Tp>::_Array (const valarray<_Tp>& __v) 172 : _M_data (__v._M_data) {} 173 174template<typename _Tp> 175inline 176_Array<_Tp>::_Array (const _Tp* __restrict__ __b, size_t __s) 177 : _M_data (new _Tp[__s]) { __valarray_copy (__b, __s, _M_data); } 178 179template<typename _Tp> 180inline void 181_Array<_Tp>::free_data() const { delete[] _M_data; } 182 183template<typename _Tp> 184inline _Tp* 185_Array<_Tp>::begin () const 186{ return _M_data; } 187 188#define _DEFINE_ARRAY_FUNCTION(_Op, _Name) \ 189template<typename _Tp> \ 190inline void \ 191_Array_augmented_##_Name (_Array<_Tp> __a, size_t __n, const _Tp& __t) \ 192{ \ 193 for (_Tp* __p=__a._M_data; __p<__a._M_data+__n; ++__p) \ 194 *__p _Op##= __t; \ 195} \ 196 \ 197template<typename _Tp> \ 198inline void \ 199_Array_augmented_##_Name (_Array<_Tp> __a, size_t __n, _Array<_Tp> __b) \ 200{ \ 201 _Tp* __p (__a._M_data); \ 202 for (_Tp* __q=__b._M_data; __q<__b._M_data+__n; ++__p, ++__q) \ 203 *__p _Op##= *__q; \ 204} \ 205 \ 206template<typename _Tp, class _Dom> \ 207void \ 208_Array_augmented_##_Name (_Array<_Tp> __a, \ 209 const _Expr<_Dom,_Tp>& __e, size_t __n) \ 210{ \ 211 _Tp* __p (__a._M_data); \ 212 for (size_t __i=0; __i<__n; ++__i, ++__p) *__p _Op##= __e[__i]; \ 213} \ 214 \ 215template<typename _Tp> \ 216inline void \ 217_Array_augmented_##_Name (_Array<_Tp> __a, size_t __n, size_t __s, \ 218 _Array<_Tp> __b) \ 219{ \ 220 _Tp* __q (__b._M_data); \ 221 for (_Tp* __p=__a._M_data; __p<__a._M_data+__s*__n; __p+=__s, ++__q) \ 222 *__p _Op##= *__q; \ 223} \ 224 \ 225template<typename _Tp> \ 226inline void \ 227_Array_augmented_##_Name (_Array<_Tp> __a, _Array<_Tp> __b, \ 228 size_t __n, size_t __s) \ 229{ \ 230 _Tp* __q (__b._M_data); \ 231 for (_Tp* __p=__a._M_data; __p<__a._M_data+__n; ++__p, __q+=__s) \ 232 *__p _Op##= *__q; \ 233} \ 234 \ 235template<typename _Tp, class _Dom> \ 236void \ 237_Array_augmented_##_Name (_Array<_Tp> __a, size_t __s, \ 238 const _Expr<_Dom,_Tp>& __e, size_t __n) \ 239{ \ 240 _Tp* __p (__a._M_data); \ 241 for (size_t __i=0; __i<__n; ++__i, __p+=__s) *__p _Op##= __e[__i]; \ 242} \ 243 \ 244template<typename _Tp> \ 245inline void \ 246_Array_augmented_##_Name (_Array<_Tp> __a, _Array<size_t> __i, \ 247 _Array<_Tp> __b, size_t __n) \ 248{ \ 249 _Tp* __q (__b._M_data); \ 250 for (size_t* __j=__i._M_data; __j<__i._M_data+__n; ++__j, ++__q) \ 251 __a._M_data[*__j] _Op##= *__q; \ 252} \ 253 \ 254template<typename _Tp> \ 255inline void \ 256_Array_augmented_##_Name (_Array<_Tp> __a, size_t __n, \ 257 _Array<_Tp> __b, _Array<size_t> __i) \ 258{ \ 259 _Tp* __p (__a._M_data); \ 260 for (size_t* __j=__i._M_data; __j<__i._M_data+__n; ++__j, ++__p) \ 261 *__p _Op##= __b._M_data[*__j]; \ 262} \ 263 \ 264template<typename _Tp, class _Dom> \ 265void \ 266_Array_augmented_##_Name (_Array<_Tp> __a, _Array<size_t> __i, \ 267 const _Expr<_Dom, _Tp>& __e, size_t __n) \ 268{ \ 269 size_t* __j (__i._M_data); \ 270 for (size_t __k=0; __k<__n; ++__k, ++__j) \ 271 __a._M_data[*__j] _Op##= __e[__k]; \ 272} \ 273 \ 274template<typename _Tp> \ 275void \ 276_Array_augmented_##_Name (_Array<_Tp> __a, _Array<bool> __m, \ 277 _Array<_Tp> __b, size_t __n) \ 278{ \ 279 bool* ok (__m._M_data); \ 280 _Tp* __p (__a._M_data); \ 281 for (_Tp* __q=__b._M_data; __q<__b._M_data+__n; ++__q, ++ok, ++__p) { \ 282 while (! *ok) { \ 283 ++ok; \ 284 ++__p; \ 285 } \ 286 *__p _Op##= *__q; \ 287 } \ 288} \ 289 \ 290template<typename _Tp> \ 291void \ 292_Array_augmented_##_Name (_Array<_Tp> __a, size_t __n, \ 293 _Array<_Tp> __b, _Array<bool> __m) \ 294{ \ 295 bool* ok (__m._M_data); \ 296 _Tp* __q (__b._M_data); \ 297 for (_Tp* __p=__a._M_data; __p<__a._M_data+__n; ++__p, ++ok, ++__q) { \ 298 while (! *ok) { \ 299 ++ok; \ 300 ++__q; \ 301 } \ 302 *__p _Op##= *__q; \ 303 } \ 304} \ 305 \ 306template<typename _Tp, class _Dom> \ 307void \ 308_Array_augmented_##_Name (_Array<_Tp> __a, _Array<bool> __m, \ 309 const _Expr<_Dom, _Tp>& __e, size_t __n) \ 310{ \ 311 bool* ok(__m._M_data); \ 312 _Tp* __p (__a._M_data); \ 313 for (size_t __i=0; __i<__n; ++__i, ++ok, ++__p) { \ 314 while (! *ok) { \ 315 ++ok; \ 316 ++__p; \ 317 } \ 318 *__p _Op##= __e[__i]; \ 319 } \ 320} 321 322_DEFINE_ARRAY_FUNCTION(+, plus) 323_DEFINE_ARRAY_FUNCTION(-, minus) 324_DEFINE_ARRAY_FUNCTION(*, multiplies) 325_DEFINE_ARRAY_FUNCTION(/, divides) 326_DEFINE_ARRAY_FUNCTION(%, modulus) 327_DEFINE_ARRAY_FUNCTION(^, xor) 328_DEFINE_ARRAY_FUNCTION(|, or) 329_DEFINE_ARRAY_FUNCTION(&, and) 330_DEFINE_ARRAY_FUNCTION(<<, shift_left) 331_DEFINE_ARRAY_FUNCTION(>>, shift_right) 332 333#undef _DEFINE_ARRAY_FUNCTION 334 335} // extern "C++" 336 337#ifdef _G_NO_VALARRAY_TEMPLATE_EXPORT 338# define export 339# include <std/valarray_array.tcc> 340#endif 341 342#endif // __VALARRAY_ARRAY__ 343 344// Local Variables: 345// mode:c++ 346// End: 347