72 lines
2.2 KiB
C
72 lines
2.2 KiB
C
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// KernelUtilsOrders.h
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//
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// Copyright (c) 2003, Ingo Weinhold (bonefish@cs.tu-berlin.de)
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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// Except as contained in this notice, the name of a copyright holder shall
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// not be used in advertising or otherwise to promote the sale, use or other
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// dealings in this Software without prior written authorization of the
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// copyright holder.
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#ifndef _KERNEL_UTILS_ORDERS_H
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#define _KERNEL_UTILS_ORDERS_H
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namespace KernelUtilsOrder {
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// Ascending
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/*! \brief A compare function object implying and ascending order.
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The < operator must be defined on the template argument type.
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*/
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template<typename Value>
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class Ascending {
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public:
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inline int operator()(const Value &a, const Value &b) const
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{
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if (a < b)
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return -1;
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else if (b < a)
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return 1;
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return 0;
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}
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};
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// Descending
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/*! \brief A compare function object implying and descending order.
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The < operator must be defined on the template argument type.
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*/
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template<typename Value>
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class Descending {
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public:
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inline int operator()(const Value &a, const Value &b) const
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{
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if (a < b)
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return -1;
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else if (b < a)
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return 1;
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return 0;
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}
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};
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} // namespace KernelUtilsOrder
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#endif // _KERNEL_UTILS_ORDERS_H
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