106 lines
2.5 KiB
C++
106 lines
2.5 KiB
C++
/*++
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Copyright (c) 2000 Microsoft Corporation
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Module Name:
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FusionAlgorithm.h
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Abstract:
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Stuff inspired by and copied from <algorithm>.
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See also NVseeLibAlgorithm.
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StdFind
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ReverseFind
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StdSwap
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Author:
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Jay M. Krell (a-JayK) May 2000
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Revision History:
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--*/
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#pragma once
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/*-----------------------------------------------------------------------------
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code based on <algorithm>
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-----------------------------------------------------------------------------*/
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template<typename InputIterator, typename T>
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inline InputIterator
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StdFind(
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InputIterator begin,
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InputIterator end,
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const T& valueToFind
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)
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{
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for (; begin != end ; ++begin)
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{
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if (*begin == valueToFind)
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{
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break;
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}
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}
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return begin;
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}
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/*-----------------------------------------------------------------------------
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This is not in the STL in this form; it is there like so:
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std::vector<T> v;
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T valueToFind;
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i = std::find(v.rbegin(), v.rend(), valueToFind);
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if (i != v.rend())
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..
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where rbegin and rend are implemented via the
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supplied "iterator adaptor" std::reverse_iterator<>:
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typedef std::reverse_iterator<const_iterator, value_type,
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const_reference, const_reference *, difference_type>
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const_reverse_iterator;
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const_reverse_iterator rbegin() const
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{return const_reverse_iterator(end()); }
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const_reverse_iterator rend() const
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{return const_reverse_iterator(begin()); }
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It is actually very elegant I believe, but I haven't used it, and we don't
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have an equivalent to std::reverse_iterator.
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-----------------------------------------------------------------------------*/
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/* InputIterator isn't quite the right name here, since we use -- instead of ++. */
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template<typename InputIterator, typename T>
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inline InputIterator
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ReverseFind(
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InputIterator begin,
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InputIterator end,
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const T& valueToFind
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)
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{
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for ( InputIterator scan = end ; scan != begin ; )
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{
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if (*--scan == valueToFind)
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{
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return scan;
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}
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}
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return end;
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}
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/*-----------------------------------------------------------------------------
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you should specialize this to memberwise swap, doing so
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usually makes it impossible for Swap to fail; two CFusionStringBuffers
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with the same heap can be swapped with no chance of failure
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-----------------------------------------------------------------------------*/
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template<typename T>
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inline VOID
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StdSwap(
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T& x,
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T& y
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)
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{
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T temp = x;
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x = y;
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y = temp;
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}
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