99 lines
3.2 KiB
C
99 lines
3.2 KiB
C
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/******************************************************************************************[Sort.h]
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Copyright (c) 2003-2007, Niklas Een, Niklas Sorensson
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Copyright (c) 2007-2010, Niklas Sorensson
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Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
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associated documentation files (the "Software"), to deal in the Software without restriction,
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including without limitation the rights to use, copy, modify, merge, publish, distribute,
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sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all copies or
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substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
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NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
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OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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**************************************************************************************************/
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#ifndef Glucose_Sort_h
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#define Glucose_Sort_h
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#include "mtl/Vec.h"
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//=================================================================================================
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// Some sorting algorithms for vec's
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namespace Glucose {
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template<class T>
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struct LessThan_default {
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bool operator () (T x, T y) { return x < y; }
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};
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template <class T, class LessThan>
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void selectionSort(T* array, int size, LessThan lt)
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{
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int i, j, best_i;
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T tmp;
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for (i = 0; i < size-1; i++){
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best_i = i;
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for (j = i+1; j < size; j++){
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if (lt(array[j], array[best_i]))
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best_i = j;
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}
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tmp = array[i]; array[i] = array[best_i]; array[best_i] = tmp;
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}
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}
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template <class T> static inline void selectionSort(T* array, int size) {
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selectionSort(array, size, LessThan_default<T>()); }
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template <class T, class LessThan>
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void sort(T* array, int size, LessThan lt)
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{
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if (size <= 15)
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selectionSort(array, size, lt);
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else{
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T pivot = array[size / 2];
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T tmp;
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int i = -1;
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int j = size;
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for(;;){
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do i++; while(lt(array[i], pivot));
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do j--; while(lt(pivot, array[j]));
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if (i >= j) break;
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tmp = array[i]; array[i] = array[j]; array[j] = tmp;
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}
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sort(array , i , lt);
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sort(&array[i], size-i, lt);
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}
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}
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template <class T> static inline void sort(T* array, int size) {
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sort(array, size, LessThan_default<T>()); }
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//=================================================================================================
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// For 'vec's:
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template <class T, class LessThan> void sort(vec<T>& v, LessThan lt) {
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sort((T*)v, v.size(), lt); }
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template <class T> void sort(vec<T>& v) {
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sort(v, LessThan_default<T>()); }
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//=================================================================================================
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}
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#endif
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