76 lines
2.0 KiB
C++
76 lines
2.0 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsAlgorithm_h___
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#define nsAlgorithm_h___
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#include "nsCharTraits.h" // for |nsCharSourceTraits|, |nsCharSinkTraits|
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template <class T>
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inline T
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NS_ROUNDUP(const T& aA, const T& aB)
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{
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return ((aA + (aB - 1)) / aB) * aB;
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}
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// We use these instead of std::min/max because we can't include the algorithm
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// header in all of XPCOM because the stl wrappers will error out when included
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// in parts of XPCOM. These functions should never be used outside of XPCOM.
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template <class T>
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inline const T&
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XPCOM_MIN(const T& aA, const T& aB)
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{
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return aB < aA ? aB : aA;
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}
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// Must return b when a == b in case a is -0
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template <class T>
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inline const T&
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XPCOM_MAX(const T& aA, const T& aB)
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{
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return aA > aB ? aA : aB;
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}
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namespace mozilla {
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template <class T>
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inline const T&
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clamped(const T& aA, const T& aMin, const T& aMax)
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{
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MOZ_ASSERT(aMax >= aMin,
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"clamped(): aMax must be greater than or equal to aMin");
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return XPCOM_MIN(XPCOM_MAX(aA, aMin), aMax);
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}
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} // namespace mozilla
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template <class InputIterator, class T>
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inline uint32_t
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NS_COUNT(InputIterator& aFirst, const InputIterator& aLast, const T& aValue)
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{
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uint32_t result = 0;
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for (; aFirst != aLast; ++aFirst)
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if (*aFirst == aValue) {
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++result;
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}
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return result;
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}
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template <class InputIterator, class OutputIterator>
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inline OutputIterator&
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copy_string(const InputIterator& aFirst, const InputIterator& aLast,
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OutputIterator& aResult)
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{
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typedef nsCharSourceTraits<InputIterator> source_traits;
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typedef nsCharSinkTraits<OutputIterator> sink_traits;
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sink_traits::write(aResult, source_traits::read(aFirst),
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source_traits::readable_distance(aFirst, aLast));
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return aResult;
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}
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#endif // !defined(nsAlgorithm_h___)
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