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// -*- C++ -*- |
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// |
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// Copyright (C) 2010-2013 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 3, or (at your option) |
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// any later version. |
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// |
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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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// Under Section 7 of GPL version 3, you are granted additional |
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// permissions described in the GCC Runtime Library Exception, version |
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// 3.1, as published by the Free Software Foundation. |
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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 COPYING3. If not see |
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// . |
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/** @file profile/impl/profiler_algos.h |
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* @brief Algorithms used by the profile extension. |
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* |
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* This file is needed to avoid including \ or \. |
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* Including those files would result in recursive includes. |
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* These implementations are oversimplified. In general, efficiency may be |
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* sacrificed to minimize maintenance overhead. |
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*/ |
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#ifndef _GLIBCXX_PROFILE_PROFILER_ALGOS_H |
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#define _GLIBCXX_PROFILE_PROFILER_ALGOS_H 1 |
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namespace __gnu_profile |
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{ |
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/* Helper for __top_n. Insert in sorted vector, but not beyond Nth elem. */ |
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template |
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void |
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__insert_top_n(_Container& __output, |
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const typename _Container::value_type& __value, |
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typename _Container::size_type __n) |
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{ |
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typename _Container::iterator __it = __output.begin(); |
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typename _Container::size_type __count = 0; |
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// Skip up to N - 1 elements larger than VALUE. |
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// XXX: Could do binary search for random iterators. |
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while (true) |
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{ |
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if (__count >= __n) |
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// VALUE is not in top N. |
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return; |
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if (__it == __output.end()) |
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break; |
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if (*__it < __value) |
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break; |
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++__it; |
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++__count; |
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} |
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__output.insert(__it, __value); |
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} |
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/* Copy the top N elements in INPUT, sorted in reverse order, to OUTPUT. */ |
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template |
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void |
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__top_n(const _Container& __input, _Container& __output, |
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typename _Container::size_type __n) |
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{ |
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__output.clear(); |
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typename _Container::const_iterator __it; |
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for (__it = __input.begin(); __it != __input.end(); ++__it) |
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__insert_top_n(__output, *__it, __n); |
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} |
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/* Simplified clone of std::for_each. */ |
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template |
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_Function |
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__for_each(_InputIterator __first, _InputIterator __last, _Function __f) |
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{ |
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for (; __first != __last; ++__first) |
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__f(*__first); |
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return __f; |
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} |
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/* Simplified clone of std::remove. */ |
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template |
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_ForwardIterator |
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__remove(_ForwardIterator __first, _ForwardIterator __last, |
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const _Tp& __value) |
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{ |
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if(__first == __last) |
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return __first; |
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_ForwardIterator __result = __first; |
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++__first; |
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for(; __first != __last; ++__first) |
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if(!(*__first == __value)) |
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{ |
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*__result = *__first; |
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++__result; |
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} |
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return __result; |
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} |
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} // namespace __gnu_profile |
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#endif /* _GLIBCXX_PROFILE_PROFILER_ALGOS_H */ |