X-Git-Url: https://oss.titaniummirror.com/gitweb?a=blobdiff_plain;f=libstdc%2B%2B-v3%2Ftestsuite%2F25_algorithms%2Fnth_element%2F2.cc;fp=libstdc%2B%2B-v3%2Ftestsuite%2F25_algorithms%2Fnth_element%2F2.cc;h=248c77be8cb7d5bd454aa3b74eb24908c3066509;hb=6fed43773c9b0ce596dca5686f37ac3fc0fa11c0;hp=0000000000000000000000000000000000000000;hpb=27b11d56b743098deb193d510b337ba22dc52e5c;p=msp430-gcc.git 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 index 00000000..248c77be --- /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 +// . + +// 25.3.2 [lib.alg.nth.element] + +// { dg-options "-DMAX_SIZE=256" { target simulator } } + +#ifndef MAX_SIZE +#define MAX_SIZE (1 << 10) +#endif + +#include +#include +#include + +void +test_set(std::vector& 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 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; +}