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- // The template and inlines for the -*- C++ -*- internal _Array helper class.
-
- // Copyright (C) 1997, 1998, 1999, 2000, 2003
- // Free Software Foundation, Inc.
- //
- // This file is part of the GNU ISO C++ Library. This library is free
- // software; you can redistribute it and/or modify it under the
- // terms of the GNU General Public License as published by the
- // Free Software Foundation; either version 2, or (at your option)
- // any later version.
-
- // This library is distributed in the hope that it will be useful,
- // but WITHOUT ANY WARRANTY; without even the implied warranty of
- // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- // GNU General Public License for more details.
-
- // You should have received a copy of the GNU General Public License along
- // with this library; see the file COPYING. If not, write to the Free
- // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- // USA.
-
- // As a special exception, you may use this file as part of a free software
- // library without restriction. Specifically, if other files instantiate
- // templates or use macros or inline functions from this file, or you compile
- // this file and link it with other files to produce an executable, this
- // file does not by itself cause the resulting executable to be covered by
- // the GNU General Public License. This exception does not however
- // invalidate any other reasons why the executable file might be covered by
- // the GNU General Public License.
-
- // Written by Gabriel Dos Reis <Gabriel.Dos-Reis@DPTMaths.ENS-Cachan.Fr>
-
- /** @file valarray_array.h
- * This is an internal header file, included by other library headers.
- * You should not attempt to use it directly.
- */
-
- #ifndef _VALARRAY_ARRAY_H
- #define _VALARRAY_ARRAY_H 1
-
- #pragma GCC system_header
-
- #include <bits/c++config.h>
- #include <bits/cpp_type_traits.h>
- #include <cstdlib>
- #include <cstring>
- #include <new>
-
- namespace std
- {
- //
- // Helper functions on raw pointers
- //
-
- // We get memory by the old fashion way
- inline void*
- __valarray_get_memory(size_t __n)
- { return operator new(__n); }
-
- template<typename _Tp>
- inline _Tp*__restrict__
- __valarray_get_storage(size_t __n)
- {
- return static_cast<_Tp*__restrict__>
- (std::__valarray_get_memory(__n * sizeof(_Tp)));
- }
-
- // Return memory to the system
- inline void
- __valarray_release_memory(void* __p)
- { operator delete(__p); }
-
- // Turn a raw-memory into an array of _Tp filled with _Tp()
- // This is required in 'valarray<T> v(n);'
- template<typename _Tp, bool>
- struct _Array_default_ctor
- {
- // Please note that this isn't exception safe. But
- // valarrays aren't required to be exception safe.
- inline static void
- _S_do_it(_Tp* __restrict__ __b, _Tp* __restrict__ __e)
- { while (__b != __e) new(__b++) _Tp(); }
- };
-
- template<typename _Tp>
- struct _Array_default_ctor<_Tp, true>
- {
- // For fundamental types, it suffices to say 'memset()'
- inline static void
- _S_do_it(_Tp* __restrict__ __b, _Tp* __restrict__ __e)
- { std::memset(__b, 0, (__e - __b)*sizeof(_Tp)); }
- };
-
- template<typename _Tp>
- inline void
- __valarray_default_construct(_Tp* __restrict__ __b, _Tp* __restrict__ __e)
- {
- _Array_default_ctor<_Tp, __is_fundamental<_Tp>::_M_type>::
- _S_do_it(__b, __e);
- }
-
- // Turn a raw-memory into an array of _Tp filled with __t
- // This is the required in valarray<T> v(n, t). Also
- // used in valarray<>::resize().
- template<typename _Tp, bool>
- struct _Array_init_ctor
- {
- // Please note that this isn't exception safe. But
- // valarrays aren't required to be exception safe.
- inline static void
- _S_do_it(_Tp* __restrict__ __b, _Tp* __restrict__ __e, const _Tp __t)
- { while (__b != __e) new(__b++) _Tp(__t); }
- };
-
- template<typename _Tp>
- struct _Array_init_ctor<_Tp, true>
- {
- inline static void
- _S_do_it(_Tp* __restrict__ __b, _Tp* __restrict__ __e, const _Tp __t)
- { while (__b != __e) *__b++ = __t; }
- };
-
- template<typename _Tp>
- inline void
- __valarray_fill_construct(_Tp* __restrict__ __b, _Tp* __restrict__ __e,
- const _Tp __t)
- {
- _Array_init_ctor<_Tp, __is_fundamental<_Tp>::_M_type>::
- _S_do_it(__b, __e, __t);
- }
-
- //
- // copy-construct raw array [__o, *) from plain array [__b, __e)
- // We can't just say 'memcpy()'
- //
- template<typename _Tp, bool>
- struct _Array_copy_ctor
- {
- // Please note that this isn't exception safe. But
- // valarrays aren't required to be exception safe.
- inline static void
- _S_do_it(const _Tp* __restrict__ __b, const _Tp* __restrict__ __e,
- _Tp* __restrict__ __o)
- { while (__b != __e) new(__o++) _Tp(*__b++); }
- };
-
- template<typename _Tp>
- struct _Array_copy_ctor<_Tp, true>
- {
- inline static void
- _S_do_it(const _Tp* __restrict__ __b, const _Tp* __restrict__ __e,
- _Tp* __restrict__ __o)
- { std::memcpy(__o, __b, (__e - __b)*sizeof(_Tp)); }
- };
-
- template<typename _Tp>
- inline void
- __valarray_copy_construct(const _Tp* __restrict__ __b,
- const _Tp* __restrict__ __e,
- _Tp* __restrict__ __o)
- {
- _Array_copy_ctor<_Tp, __is_fundamental<_Tp>::_M_type>::
- _S_do_it(__b, __e, __o);
- }
-
- // copy-construct raw array [__o, *) from strided array __a[<__n : __s>]
- template<typename _Tp>
- inline void
- __valarray_copy_construct (const _Tp* __restrict__ __a, size_t __n,
- size_t __s, _Tp* __restrict__ __o)
- {
- if (__is_fundamental<_Tp>::_M_type)
- while (__n--) { *__o++ = *__a; __a += __s; }
- else
- while (__n--) { new(__o++) _Tp(*__a); __a += __s; }
- }
-
- // copy-construct raw array [__o, *) from indexed array __a[__i[<__n>]]
- template<typename _Tp>
- inline void
- __valarray_copy_construct (const _Tp* __restrict__ __a,
- const size_t* __restrict__ __i,
- _Tp* __restrict__ __o, size_t __n)
- {
- if (__is_fundamental<_Tp>::_M_type)
- while (__n--) *__o++ = __a[*__i++];
- else
- while (__n--) new (__o++) _Tp(__a[*__i++]);
- }
-
- // Do the necessary cleanup when we're done with arrays.
- template<typename _Tp>
- inline void
- __valarray_destroy_elements(_Tp* __restrict__ __b, _Tp* __restrict__ __e)
- {
- if (!__is_fundamental<_Tp>::_M_type)
- while (__b != __e) { __b->~_Tp(); ++__b; }
- }
-
- // Fill a plain array __a[<__n>] with __t
- template<typename _Tp>
- inline void
- __valarray_fill (_Tp* __restrict__ __a, size_t __n, const _Tp& __t)
- { while (__n--) *__a++ = __t; }
-
- // fill strided array __a[<__n-1 : __s>] with __t
- template<typename _Tp>
- inline void
- __valarray_fill (_Tp* __restrict__ __a, size_t __n,
- size_t __s, const _Tp& __t)
- { for (size_t __i=0; __i<__n; ++__i, __a+=__s) *__a = __t; }
-
- // fill indir ect array __a[__i[<__n>]] with __i
- template<typename _Tp>
- inline void
- __valarray_fill(_Tp* __restrict__ __a, const size_t* __restrict__ __i,
- size_t __n, const _Tp& __t)
- { for (size_t __j=0; __j<__n; ++__j, ++__i) __a[*__i] = __t; }
-
- // copy plain array __a[<__n>] in __b[<__n>]
- // For non-fundamental types, it is wrong to say 'memcpy()'
- template<typename _Tp, bool>
- struct _Array_copier
- {
- inline static void
- _S_do_it(const _Tp* __restrict__ __a, size_t __n, _Tp* __restrict__ __b)
- { while (__n--) *__b++ = *__a++; }
- };
-
- template<typename _Tp>
- struct _Array_copier<_Tp, true>
- {
- inline static void
- _S_do_it(const _Tp* __restrict__ __a, size_t __n, _Tp* __restrict__ __b)
- { std::memcpy (__b, __a, __n * sizeof (_Tp)); }
- };
-
- // Copy a plain array __a[<__n>] into a play array __b[<>]
- template<typename _Tp>
- inline void
- __valarray_copy(const _Tp* __restrict__ __a, size_t __n,
- _Tp* __restrict__ __b)
- {
- _Array_copier<_Tp, __is_fundamental<_Tp>::_M_type>::
- _S_do_it(__a, __n, __b);
- }
-
- // Copy strided array __a[<__n : __s>] in plain __b[<__n>]
- template<typename _Tp>
- inline void
- __valarray_copy(const _Tp* __restrict__ __a, size_t __n, size_t __s,
- _Tp* __restrict__ __b)
- { for (size_t __i=0; __i<__n; ++__i, ++__b, __a += __s) *__b = *__a; }
-
- // Copy a plain array __a[<__n>] into a strided array __b[<__n : __s>]
- template<typename _Tp>
- inline void
- __valarray_copy(const _Tp* __restrict__ __a, _Tp* __restrict__ __b,
- size_t __n, size_t __s)
- { for (size_t __i=0; __i<__n; ++__i, ++__a, __b+=__s) *__b = *__a; }
-
- // Copy strided array __src[<__n : __s1>] into another
- // strided array __dst[< : __s2>]. Their sizes must match.
- template<typename _Tp>
- inline void
- __valarray_copy(const _Tp* __restrict__ __src, size_t __n, size_t __s1,
- _Tp* __restrict__ __dst, size_t __s2)
- {
- for (size_t __i = 0; __i < __n; ++__i)
- __dst[__i * __s2] = __src [ __i * __s1];
- }
-
-
- // Copy an indexed array __a[__i[<__n>]] in plain array __b[<__n>]
- template<typename _Tp>
- inline void
- __valarray_copy (const _Tp* __restrict__ __a,
- const size_t* __restrict__ __i,
- _Tp* __restrict__ __b, size_t __n)
- { for (size_t __j=0; __j<__n; ++__j, ++__b, ++__i) *__b = __a[*__i]; }
-
- // Copy a plain array __a[<__n>] in an indexed array __b[__i[<__n>]]
- template<typename _Tp>
- inline void
- __valarray_copy (const _Tp* __restrict__ __a, size_t __n,
- _Tp* __restrict__ __b, const size_t* __restrict__ __i)
- { for (size_t __j=0; __j<__n; ++__j, ++__a, ++__i) __b[*__i] = *__a; }
-
- // Copy the __n first elements of an indexed array __src[<__i>] into
- // another indexed array __dst[<__j>].
- template<typename _Tp>
- inline void
- __valarray_copy(const _Tp* __restrict__ __src, size_t __n,
- const size_t* __restrict__ __i,
- _Tp* __restrict__ __dst, const size_t* __restrict__ __j)
- {
- for (size_t __k = 0; __k < __n; ++__k)
- __dst[*__j++] = __src[*__i++];
- }
-
- //
- // Compute the sum of elements in range [__f, __l)
- // This is a naive algorithm. It suffers from cancelling.
- // In the future try to specialize
- // for _Tp = float, double, long double using a more accurate
- // algorithm.
- //
- template<typename _Tp>
- inline _Tp
- __valarray_sum(const _Tp* __restrict__ __f, const _Tp* __restrict__ __l)
- {
- _Tp __r = _Tp();
- while (__f != __l) __r += *__f++;
- return __r;
- }
-
- // Compute the product of all elements in range [__f, __l)
- template<typename _Tp>
- inline _Tp
- __valarray_product(const _Tp* __restrict__ __f,
- const _Tp* __restrict__ __l)
- {
- _Tp __r = _Tp(1);
- while (__f != __l) __r = __r * *__f++;
- return __r;
- }
-
- // Compute the min/max of an array-expression
- template<typename _Ta>
- inline typename _Ta::value_type
- __valarray_min(const _Ta& __a)
- {
- size_t __s = __a.size();
- typedef typename _Ta::value_type _Value_type;
- _Value_type __r = __s == 0 ? _Value_type() : __a[0];
- for (size_t __i = 1; __i < __s; ++__i)
- {
- _Value_type __t = __a[__i];
- if (__t < __r)
- __r = __t;
- }
- return __r;
- }
-
- template<typename _Ta>
- inline typename _Ta::value_type
- __valarray_max(const _Ta& __a)
- {
- size_t __s = __a.size();
- typedef typename _Ta::value_type _Value_type;
- _Value_type __r = __s == 0 ? _Value_type() : __a[0];
- for (size_t __i = 1; __i < __s; ++__i)
- {
- _Value_type __t = __a[__i];
- if (__t > __r)
- __r = __t;
- }
- return __r;
- }
-
- //
- // Helper class _Array, first layer of valarray abstraction.
- // All operations on valarray should be forwarded to this class
- // whenever possible. -- gdr
- //
-
- template<typename _Tp>
- struct _Array
- {
- explicit _Array (size_t);
- explicit _Array (_Tp* const __restrict__);
- explicit _Array (const valarray<_Tp>&);
- _Array (const _Tp* __restrict__, size_t);
-
- _Tp* begin () const;
-
- _Tp* const __restrict__ _M_data;
- };
-
- template<typename _Tp>
- inline void
- __valarray_fill (_Array<_Tp> __a, size_t __n, const _Tp& __t)
- { std::__valarray_fill (__a._M_data, __n, __t); }
-
- template<typename _Tp>
- inline void
- __valarray_fill (_Array<_Tp> __a, size_t __n, size_t __s, const _Tp& __t)
- { std::__valarray_fill (__a._M_data, __n, __s, __t); }
-
- template<typename _Tp>
- inline void
- __valarray_fill (_Array<_Tp> __a, _Array<size_t> __i,
- size_t __n, const _Tp& __t)
- { std::__valarray_fill (__a._M_data, __i._M_data, __n, __t); }
-
- // Copy a plain array __a[<__n>] into a play array __b[<>]
- template<typename _Tp>
- inline void
- __valarray_copy(_Array<_Tp> __a, size_t __n, _Array<_Tp> __b)
- { std::__valarray_copy(__a._M_data, __n, __b._M_data); }
-
- // Copy strided array __a[<__n : __s>] in plain __b[<__n>]
- template<typename _Tp>
- inline void
- __valarray_copy(_Array<_Tp> __a, size_t __n, size_t __s, _Array<_Tp> __b)
- { std::__valarray_copy(__a._M_data, __n, __s, __b._M_data); }
-
- // Copy a plain array __a[<__n>] into a strided array __b[<__n : __s>]
- template<typename _Tp>
- inline void
- __valarray_copy(_Array<_Tp> __a, _Array<_Tp> __b, size_t __n, size_t __s)
- { __valarray_copy(__a._M_data, __b._M_data, __n, __s); }
-
- // Copy strided array __src[<__n : __s1>] into another
- // strided array __dst[< : __s2>]. Their sizes must match.
- template<typename _Tp>
- inline void
- __valarray_copy(_Array<_Tp> __a, size_t __n, size_t __s1,
- _Array<_Tp> __b, size_t __s2)
- { std::__valarray_copy(__a._M_data, __n, __s1, __b._M_data, __s2); }
-
-
- // Copy an indexed array __a[__i[<__n>]] in plain array __b[<__n>]
- template<typename _Tp>
- inline void
- __valarray_copy(_Array<_Tp> __a, _Array<size_t> __i,
- _Array<_Tp> __b, size_t __n)
- { std::__valarray_copy(__a._M_data, __i._M_data, __b._M_data, __n); }
-
- // Copy a plain array __a[<__n>] in an indexed array __b[__i[<__n>]]
- template<typename _Tp>
- inline void
- __valarray_copy(_Array<_Tp> __a, size_t __n, _Array<_Tp> __b,
- _Array<size_t> __i)
- { std::__valarray_copy(__a._M_data, __n, __b._M_data, __i._M_data); }
-
- // Copy the __n first elements of an indexed array __src[<__i>] into
- // another indexed array __dst[<__j>].
- template<typename _Tp>
- inline void
- __valarray_copy(_Array<_Tp> __src, size_t __n, _Array<size_t> __i,
- _Array<_Tp> __dst, _Array<size_t> __j)
- {
- std::__valarray_copy(__src._M_data, __n, __i._M_data,
- __dst._M_data, __j._M_data);
- }
-
- template<typename _Tp>
- inline
- _Array<_Tp>::_Array (size_t __n)
- : _M_data(__valarray_get_storage<_Tp>(__n))
- { std::__valarray_default_construct(_M_data, _M_data + __n); }
-
- template<typename _Tp>
- inline
- _Array<_Tp>::_Array (_Tp* const __restrict__ __p) : _M_data (__p) {}
-
- template<typename _Tp>
- inline _Array<_Tp>::_Array (const valarray<_Tp>& __v)
- : _M_data (__v._M_data) {}
-
- template<typename _Tp>
- inline
- _Array<_Tp>::_Array (const _Tp* __restrict__ __b, size_t __s)
- : _M_data(__valarray_get_storage<_Tp>(__s))
- { std::__valarray_copy_construct(__b, __s, _M_data); }
-
- template<typename _Tp>
- inline _Tp*
- _Array<_Tp>::begin () const
- { return _M_data; }
-
- #define _DEFINE_ARRAY_FUNCTION(_Op, _Name) \
- template<typename _Tp> \
- inline void \
- _Array_augmented_##_Name (_Array<_Tp> __a, size_t __n, const _Tp& __t) \
- { \
- for (_Tp* __p=__a._M_data; __p<__a._M_data+__n; ++__p) \
- *__p _Op##= __t; \
- } \
- \
- template<typename _Tp> \
- inline void \
- _Array_augmented_##_Name (_Array<_Tp> __a, size_t __n, _Array<_Tp> __b) \
- { \
- _Tp* __p = __a._M_data; \
- for (_Tp* __q=__b._M_data; __q<__b._M_data+__n; ++__p, ++__q) \
- *__p _Op##= *__q; \
- } \
- \
- template<typename _Tp, class _Dom> \
- void \
- _Array_augmented_##_Name (_Array<_Tp> __a, \
- const _Expr<_Dom,_Tp>& __e, size_t __n) \
- { \
- _Tp* __p (__a._M_data); \
- for (size_t __i=0; __i<__n; ++__i, ++__p) *__p _Op##= __e[__i]; \
- } \
- \
- template<typename _Tp> \
- inline void \
- _Array_augmented_##_Name (_Array<_Tp> __a, size_t __n, size_t __s, \
- _Array<_Tp> __b) \
- { \
- _Tp* __q (__b._M_data); \
- for (_Tp* __p=__a._M_data; __p<__a._M_data+__s*__n; __p+=__s, ++__q) \
- *__p _Op##= *__q; \
- } \
- \
- template<typename _Tp> \
- inline void \
- _Array_augmented_##_Name (_Array<_Tp> __a, _Array<_Tp> __b, \
- size_t __n, size_t __s) \
- { \
- _Tp* __q (__b._M_data); \
- for (_Tp* __p=__a._M_data; __p<__a._M_data+__n; ++__p, __q+=__s) \
- *__p _Op##= *__q; \
- } \
- \
- template<typename _Tp, class _Dom> \
- void \
- _Array_augmented_##_Name (_Array<_Tp> __a, size_t __s, \
- const _Expr<_Dom,_Tp>& __e, size_t __n) \
- { \
- _Tp* __p (__a._M_data); \
- for (size_t __i=0; __i<__n; ++__i, __p+=__s) *__p _Op##= __e[__i]; \
- } \
- \
- template<typename _Tp> \
- inline void \
- _Array_augmented_##_Name (_Array<_Tp> __a, _Array<size_t> __i, \
- _Array<_Tp> __b, size_t __n) \
- { \
- _Tp* __q (__b._M_data); \
- for (size_t* __j=__i._M_data; __j<__i._M_data+__n; ++__j, ++__q) \
- __a._M_data[*__j] _Op##= *__q; \
- } \
- \
- template<typename _Tp> \
- inline void \
- _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) \
- *__p _Op##= __b._M_data[*__j]; \
- } \
- \
- template<typename _Tp, class _Dom> \
- void \
- _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(^, __bitwise_xor)
- _DEFINE_ARRAY_FUNCTION(|, __bitwise_or)
- _DEFINE_ARRAY_FUNCTION(&, __bitwise_and)
- _DEFINE_ARRAY_FUNCTION(<<, __shift_left)
- _DEFINE_ARRAY_FUNCTION(>>, __shift_right)
-
- #undef _DEFINE_VALARRAY_FUNCTION
- } // namespace std
-
- #ifndef _GLIBCXX_EXPORT_TEMPLATE
- # include <bits/valarray_array.tcc>
- #endif
-
- #endif /* _ARRAY_H */
-