Add more CTL content

ctl/sort.h

@@ -0,0 +1,44 @@
+// -*-mode:c++;indent-tabs-mode:nil;c-basic-offset:4;tab-width:8;coding:utf-8-*-
+// vi: set et ft=cpp ts=4 sts=4 sw=4 fenc=utf-8 :vi
+#ifndef CTL_SORT_H_
+#define CTL_SORT_H_
+#include "iterator_traits.h"
+#include "less.h"
+#include "partition.h"
+
+namespace ctl {
+
+namespace detail {
+
+template<typename RandomIt, typename Compare>
+void
+quicksort(RandomIt first, RandomIt last, Compare comp)
+{
+    if (first < last) {
+        auto pivot = ctl::partition(first, last, comp);
+        quicksort(first, pivot, comp);
+        quicksort(pivot + 1, last, comp);
+    }
+}
+
+} // namespace detail
+
+template<typename RandomIt, typename Compare>
+void
+sort(RandomIt first, RandomIt last, Compare comp)
+{
+    detail::quicksort(first, last, comp);
+}
+
+template<typename RandomIt>
+void
+sort(RandomIt first, RandomIt last)
+{
+    sort(first,
+         last,
+         ctl::less<typename ctl::iterator_traits<RandomIt>::value_type>());
+}
+
+} // namespace ctl
+
+#endif // CTL_SORT_H_