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- //----------------------------------------------------------------------------
- /// @file test_flat_stable_sort.cpp
- /// @brief test program of the flat_stable_sort algorithm
- ///
- /// @author Copyright (c) 2017 Francisco José Tapia (fjtapia@gmail.com )\n
- /// Distributed under the Boost Software License, Version 1.0.\n
- /// ( See accompanying file LICENSE_1_0.txt or copy at
- /// http://www.boost.org/LICENSE_1_0.txt )
- /// @version 0.1
- ///
- /// @remarks
- //-----------------------------------------------------------------------------
- #include <algorithm>
- #include <iostream>
- #include <random>
- #include <vector>
- #include <ciso646>
- #include <boost/sort/flat_stable_sort/flat_stable_sort.hpp>
- #include <boost/test/included/test_exec_monitor.hpp>
- #include <boost/test/test_tools.hpp>
- using namespace boost::sort;
- void test1 ( );
- void test2 ( );
- void test3 ( );
- //---------------- stability test -----------------------------------
- struct xk
- {
- unsigned tail : 4;
- unsigned num : 28;
- xk ( uint32_t n =0 , uint32_t t =0): tail (t), num(n){};
- bool operator< (xk A) const { return (num < A.num); };
- };
- void test1 ( )
- {
- typedef typename std::vector< xk >::iterator iter_t;
- typedef std::less< xk > compare_t;
- std::mt19937_64 my_rand (0);
- const uint32_t NMAX = 100000;
- std::vector< xk > V1, V2;
- V1.reserve (NMAX);
- for (uint32_t i = 0; i < 8; ++i) {
- for (uint32_t k = 0; k < NMAX; ++k) {
- uint32_t NM = my_rand ( );
- xk G;
- G.num = NM >> 3;
- G.tail = i;
- V1.push_back (G);
- };
- };
- V2 = V1;
- flat_stable_sort< iter_t, compare_t > (V1.begin ( ), V1.end ( ), compare_t ( ));
- std::stable_sort (V2.begin ( ), V2.end ( ));
- BOOST_CHECK (V1.size ( ) == V2.size ( ));
- for (uint32_t i = 0; i < V1.size ( ); ++i) {
- BOOST_CHECK (V1[ i ].num == V2[ i ].num and
- V1[ i ].tail == V2[ i ].tail);
- };
- };
- void test2 (void)
- {
- typedef std::less< uint64_t > compare_t;
- const uint32_t NElem = 100000;
- std::vector< uint64_t > V1,V2;
- std::mt19937_64 my_rand (0);
- compare_t comp;
- // ------------------------ random elements -------------------------------
- for (uint32_t i = 0; i < NElem; ++i) V1.push_back (my_rand ( ) % NElem);
- V2 = V1;
- flat_stable_sort (V1.begin ( ), V1.end ( ), comp);
- std::stable_sort (V2.begin ( ), V2.end ( ), comp);
- for (unsigned i = 0; i < NElem; i++) {
- BOOST_CHECK (V2[ i ] == V1[ i ]);
- };
- // --------------------------- sorted elements ----------------------------
- V1.clear ( );
- for (uint32_t i = 0; i < NElem; ++i) V1.push_back (i);
- flat_stable_sort (V1.begin ( ), V1.end ( ), comp);
- for (unsigned i = 1; i < NElem; i++) {
- BOOST_CHECK (V1[ i - 1 ] <= V1[ i ]);
- };
- //-------------------------- reverse sorted elements ----------------------
- V1.clear ( );
- for (uint32_t i = 0; i < NElem; ++i) V1.push_back (NElem - i);
- flat_stable_sort (V1.begin ( ), V1.end ( ), comp);
- for (unsigned i = 1; i < NElem; i++) {
- BOOST_CHECK (V1[ i - 1 ] <= V1[ i ]);
- };
- //---------------------------- equal elements ----------------------------
- V1.clear ( );
- for (uint32_t i = 0; i < NElem; ++i) V1.push_back (1000);
- flat_stable_sort (V1.begin ( ), V1.end ( ), comp);
- for (unsigned i = 1; i < NElem; i++) {
- BOOST_CHECK (V1[ i - 1 ] == V1[ i ]);
- };
- };
- void test3 (void)
- {
- typedef typename std::vector<xk>::iterator iter_t;
- typedef std::less<xk> compare_t;
- std::mt19937 my_rand (0);
- std::vector<xk> V ;
- const uint32_t NELEM = 100000;
- V.reserve(NELEM * 10);
- for (uint32_t k =0 ; k < 10 ; ++k)
- { for ( uint32_t i =0 ; i < NELEM ; ++i)
- { V.emplace_back(i , k);
- };
- iter_t first = V.begin() + (k * NELEM);
- iter_t last = first + NELEM ;
- std::shuffle( first, last, my_rand);
- };
- flat_stable_sort( V.begin() , V.end(), compare_t());
- for ( uint32_t i =0 ; i < ( NELEM * 10); ++i)
- { BOOST_CHECK ( V[i].num == (i / 10) and V[i].tail == (i %10) );
- };
- }
- int test_main (int, char *[])
- {
- test1 ( );
- test2 ( );
- test3 ( );
- return 0;
- };
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