Imported gcc-4.4.3

[msp430-gcc.git] / libstdc++-v3 / testsuite / 25_algorithms / nth_element / 2.cc

diff --git a/libstdc++-v3/testsuite/25_algorithms/nth_element/2.cc b/libstdc++-v3/testsuite/25_algorithms/nth_element/2.cc
new file mode 100644 (file)
index 0000000..248c77b
--- /dev/null
+++ b/libstdc++-v3/testsuite/25_algorithms/nth_element/2.cc
@@ -0,0 +1,80 @@
+// Copyright (C) 2006, 2007, 2009 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+// 25.3.2 [lib.alg.nth.element]
+
+// { dg-options "-DMAX_SIZE=256" { target simulator } }
+
+#ifndef MAX_SIZE
+#define MAX_SIZE (1 << 10)
+#endif
+
+#include <vector>
+#include <algorithm>
+#include <testsuite_hooks.h>
+
+void
+test_set(std::vector<unsigned>& v, unsigned size)
+{
+  v.clear();
+
+  for (unsigned i = 0; i < size; i += 4)
+    {
+      v.push_back(i / 2);
+      v.push_back((size - 2) - (i / 2));
+    }
+  for (unsigned i = 1; i < size; i += 2)
+    v.push_back(i);
+}
+
+void
+do_test01(unsigned size)
+{
+  bool test __attribute__((unused)) = true;
+
+  std::vector<unsigned> v, s;
+
+  for (unsigned j = 0; j < size; ++j)
+    {
+      test_set(v, size);
+      s = v;
+      std::sort(s.begin(), s.end());
+      
+      std::nth_element(v.begin(), v.begin() + j, v.end());
+
+      VERIFY( v[j] == s[j] );
+      
+      for (unsigned i = 0; i < j; ++i)
+       VERIFY( !(v[j] < v[i]) );
+
+      for (unsigned i = j; i < v.size(); ++i)
+       VERIFY( !(v[i] < v[j]) );
+    }
+}
+
+void
+test01()
+{
+  for (unsigned size = 4; size <= MAX_SIZE; size <<= 1)
+    do_test01(size);
+}
+
+int main()
+{
+  test01();
+  return 0;
+}