File indexing completed on 2024-12-22 05:13:36

 /*
     SPDX-FileCopyrightText: 2015 Ivan Cukic <ivan.cukic(at)kde.org>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #ifndef UTILS_SLIDE_H
 #define UTILS_SLIDE_H
 
 #include <algorithm>
 
 // Inspired by C++ Seasoning talk by Sean Parent
 
 namespace kamd
 {
 namespace utils
 {
 template<typename Iterator>
 void slide(Iterator f, Iterator l, Iterator p)
 {
     if (p < f) {
         std::rotate(p, f, l);
     } else if (l < p) {
         std::rotate(f, l, p);
     }
 }
 
 template<typename Iterator>
 void slide_one(Iterator f, Iterator p)
 {
     slide(f, f + 1, p);
 }
 
 template<typename Iterator>
 void move_one(Iterator from, Iterator to)
 {
     if (from < to) {
         while (from != to) {
             using std::swap;
             swap(*from, *(from + 1));
             ++from;
         }
     } else {
         while (from != to) {
             using std::swap;
             swap(*from, *(from - 1));
             --from;
         }
     }
 }
 
 } // namespace utils
 } // namespace kamd
 
 #endif // UTILS_SLIDE_H