整理

include/boost/move/algo/detail/search.hpp

@@ -0,0 +1,79 @@
+//////////////////////////////////////////////////////////////////////////////
+//
+// (C) Copyright Ion Gaztanaga 2022-2022.
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+// See http://www.boost.org/libs/move for documentation.
+//
+//////////////////////////////////////////////////////////////////////////////
+#ifndef BOOST_MOVE_DETAIL_SEARCH_HPP
+#define BOOST_MOVE_DETAIL_SEARCH_HPP
+
+#include <boost/move/detail/iterator_traits.hpp>
+
+#if defined(BOOST_CLANG) || (defined(BOOST_GCC) && (BOOST_GCC >= 40600))
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wsign-conversion"
+#endif
+
+namespace boost {
+namespace movelib {
+
+template <class RandIt, class T, class Compare>
+RandIt lower_bound
+   (RandIt first, const RandIt last, const T& key, Compare comp)
+{
+   typedef typename iter_size<RandIt>::type size_type;
+   size_type len = size_type(last - first);
+   RandIt middle;
+
+   while (len) {
+      size_type step = size_type(len >> 1);
+      middle = first;
+      middle += step;
+
+      if (comp(*middle, key)) {
+         first = ++middle;
+         len = size_type(len - (step + 1));
+      }
+      else{
+         len = step;
+      }
+   }
+   return first;
+}
+
+template <class RandIt, class T, class Compare>
+RandIt upper_bound
+   (RandIt first, const RandIt last, const T& key, Compare comp)
+{
+   typedef typename iter_size<RandIt>::type size_type;
+   size_type len = size_type(last - first);
+   RandIt middle;
+
+   while (len) {
+      size_type step = size_type(len >> 1);
+      middle = first;
+      middle += step;
+
+      if (!comp(key, *middle)) {
+         first = ++middle;
+         len = size_type(len - (step + 1));
+      }
+      else{
+         len = step;
+      }
+   }
+   return first;
+}
+
+}  //namespace movelib {
+}  //namespace boost {
+
+#if defined(BOOST_CLANG) || (defined(BOOST_GCC) && (BOOST_GCC >= 40600))
+#pragma GCC diagnostic pop
+#endif
+
+#endif   //#define BOOST_MOVE_DETAIL_SEARCH_HPP