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81 lines
2.8 KiB
81 lines
2.8 KiB
5 years ago
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/***************************************************************************
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*
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* valaray.cc - Declarations for the Standard Library valarray
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*
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* $Id: valarray.cc 172106 2011-11-02 17:04:12Z statham $
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*
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***************************************************************************
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*
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* Copyright (c) 1994-2001 Rogue Wave Software, Inc. All Rights Reserved.
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*
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* This computer software is owned by Rogue Wave Software, Inc. and is
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* protected by U.S. copyright laws and other laws and by international
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* treaties. This computer software is furnished by Rogue Wave Software,
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* Inc. pursuant to a written license agreement and may be used, copied,
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* transmitted, and stored only in accordance with the terms of such
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* license and with the inclusion of the above copyright notice. This
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* computer software or any other copies thereof may not be provided or
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* otherwise made available to any other person.
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*
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* U.S. Government Restricted Rights. This computer software is provided
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* with Restricted Rights. Use, duplication, or disclosure by the
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* Government is subject to restrictions as set forth in subparagraph (c)
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* (1) (ii) of The Rights in Technical Data and Computer Software clause
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* at DFARS 252.227-7013 or subparagraphs (c) (1) and (2) of the
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* Commercial Computer Software--Restricted Rights at 48 CFR 52.227-19,
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* as applicable. Manufacturer is Rogue Wave Software, Inc., 5500
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* Flatiron Parkway, Boulder, Colorado 80301 USA.
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*
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**************************************************************************/
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_RWSTD_NAMESPACE_BEGIN (std)
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template <class _TypeT>
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inline valarray<_TypeT> valarray<_TypeT>::shift (int __n) const
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{
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if (0 == __n)
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return *this;
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if (size () <= size_t (__n < 0 ? -__n : __n))
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return valarray (_TypeT (), size ());
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_RW::__rw_array <_TypeT> __tmp =
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_RW::__rw_array <_TypeT> (_TypeT (), size ());
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// 26.3.2.7, p5 - negative n shifts right, positive left
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if (__n < 0)
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copy (_C_array.begin (), _C_array.end () + __n, __tmp.begin () - __n);
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else
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copy (_C_array.begin () + __n, _C_array.end (), __tmp.begin ());
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return valarray (__tmp);
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}
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template <class _TypeT>
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inline valarray<_TypeT> valarray<_TypeT>::cshift (int __n) const
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{
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// compute non-negative modulus - the sign of (a % b) is
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// implementation-defined if either argument is negative (5.6, p4)
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ptrdiff_t __mod = __n % ptrdiff_t (size ());
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size_t __rem = __mod < 0 ? -__mod : __mod;
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if (0 == __rem)
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return *this;
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_RW::__rw_array <_TypeT> __tmp (size ());
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// 26.3.2.7, p7 - negative n rotates right, positive left
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rotate_copy (_C_array.begin (),
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__n < 0 ? _C_array.end () - __rem : _C_array.begin () + __rem,
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_C_array.end (), __tmp.begin ());
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return valarray (__tmp);
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}
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_RWSTD_NAMESPACE_END // std
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