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78 lines
1.9 KiB
C++
78 lines
1.9 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
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T
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NS_ROUNDUP( const T& a, const T& b )
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{
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return ((a + (b - 1)) / b) * b;
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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
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const T&
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XPCOM_MIN( const T& a, const T& b )
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{
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return b < a ? b : a;
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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
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const T&
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XPCOM_MAX( const T& a, const T& b )
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{
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return a > b ? a : b;
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}
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namespace mozilla {
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template <class T>
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inline
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const T&
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clamped( const T& a, const T& min, const T& max )
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{
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NS_ABORT_IF_FALSE(max >= min, "clamped(): max must be greater than or equal to min");
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return XPCOM_MIN(XPCOM_MAX(a, min), max);
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}
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}
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template <class InputIterator, class T>
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inline
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uint32_t
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NS_COUNT( InputIterator& first, const InputIterator& last, const T& value )
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{
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uint32_t result = 0;
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for ( ; first != last; ++first )
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if ( *first == value )
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++result;
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return result;
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}
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template <class InputIterator, class OutputIterator>
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inline
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OutputIterator&
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copy_string( const InputIterator& first, const InputIterator& last, OutputIterator& result )
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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(result, source_traits::read(first), source_traits::readable_distance(first, last));
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return result;
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}
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#endif // !defined(nsAlgorithm_h___)
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