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// (C) Copyright Jesse Williamson 2009
// Use, modification and distribution are subject to 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)
#include <iostream>
#include <vector>
#include <boost/config.hpp>
#include <boost/algorithm/clamp.hpp>
#define BOOST_TEST_MAIN
#include <boost/test/unit_test.hpp>
namespace ba = boost::algorithm;
BOOST_CONSTEXPR bool intGreater ( int lhs, int rhs ) { return lhs > rhs; }
BOOST_CONSTEXPR bool doubleGreater ( double lhs, double rhs ) { return lhs > rhs; }
class custom {
public:
custom ( int x ) : v(x) {}
custom ( const custom &rhs ) : v(rhs.v) {}
~custom () {}
custom & operator = ( const custom &rhs ) { v = rhs.v; return *this; }
bool operator < ( const custom &rhs ) const { return v < rhs.v; }
bool operator == ( const custom &rhs ) const { return v == rhs.v; } // need this for the test
std::ostream & print ( std::ostream &os ) const { return os << v; }
int v;
};
std::ostream & operator << ( std::ostream & os, const custom &x ) { return x.print ( os ); }
bool customLess ( const custom &lhs, const custom &rhs ) { return lhs.v < rhs.v; }
void test_ints()
{
// Inside the range, equal to the endpoints, and outside the endpoints.
BOOST_CHECK_EQUAL ( 3, ba::clamp ( 3, 1, 10 ));
BOOST_CHECK_EQUAL ( 1, ba::clamp ( 1, 1, 10 ));
BOOST_CHECK_EQUAL ( 1, ba::clamp ( 0, 1, 10 ));
BOOST_CHECK_EQUAL ( 10, ba::clamp ( 10, 1, 10 ));
BOOST_CHECK_EQUAL ( 10, ba::clamp ( 11, 1, 10 ));
BOOST_CXX14_CONSTEXPR bool constexpr_res = (
ba::clamp ( 3, 1, 10 ) == 3
);
BOOST_CHECK( constexpr_res );
BOOST_CHECK_EQUAL ( 3, ba::clamp ( 3, 10, 1, intGreater ));
BOOST_CHECK_EQUAL ( 1, ba::clamp ( 1, 10, 1, intGreater ));
BOOST_CHECK_EQUAL ( 1, ba::clamp ( 0, 10, 1, intGreater ));
BOOST_CHECK_EQUAL ( 10, ba::clamp ( 10, 10, 1, intGreater ));
BOOST_CHECK_EQUAL ( 10, ba::clamp ( 11, 10, 1, intGreater ));
// Negative numbers
BOOST_CHECK_EQUAL ( -3, ba::clamp ( -3, -10, -1 ));
BOOST_CHECK_EQUAL ( -1, ba::clamp ( -1, -10, -1 ));
BOOST_CHECK_EQUAL ( -1, ba::clamp ( 0, -10, -1 ));
BOOST_CHECK_EQUAL ( -10, ba::clamp ( -10, -10, -1 ));
BOOST_CHECK_EQUAL ( -10, ba::clamp ( -11, -10, -1 ));
// Mixed positive and negative numbers
BOOST_CHECK_EQUAL ( 5, ba::clamp ( 5, -10, 10 ));
BOOST_CHECK_EQUAL ( -10, ba::clamp ( -10, -10, 10 ));
BOOST_CHECK_EQUAL ( -10, ba::clamp ( -15, -10, 10 ));
BOOST_CHECK_EQUAL ( 10, ba::clamp ( 10, -10, 10 ));
BOOST_CHECK_EQUAL ( 10, ba::clamp ( 15, -10, 10 ));
// Unsigned
BOOST_CHECK_EQUAL ( 5U, ba::clamp ( 5U, 1U, 10U ));
BOOST_CHECK_EQUAL ( 1U, ba::clamp ( 1U, 1U, 10U ));
BOOST_CHECK_EQUAL ( 1U, ba::clamp ( 0U, 1U, 10U ));
BOOST_CHECK_EQUAL ( 10U, ba::clamp ( 10U, 1U, 10U ));
BOOST_CHECK_EQUAL ( 10U, ba::clamp ( 15U, 1U, 10U ));
// Mixed (1)
BOOST_CHECK_EQUAL ( 5U, ba::clamp ( 5U, 1, 10 ));
BOOST_CHECK_EQUAL ( 1U, ba::clamp ( 1U, 1, 10 ));
BOOST_CHECK_EQUAL ( 1U, ba::clamp ( 0U, 1, 10 ));
BOOST_CHECK_EQUAL ( 10U, ba::clamp ( 10U, 1, 10 ));
BOOST_CHECK_EQUAL ( 10U, ba::clamp ( 15U, 1, 10 ));
// Mixed (3)
BOOST_CHECK_EQUAL ( 5U, ba::clamp ( 5U, 1, 10. ));
BOOST_CHECK_EQUAL ( 1U, ba::clamp ( 1U, 1, 10. ));
BOOST_CHECK_EQUAL ( 1U, ba::clamp ( 0U, 1, 10. ));
BOOST_CHECK_EQUAL ( 10U, ba::clamp ( 10U, 1, 10. ));
BOOST_CHECK_EQUAL ( 10U, ba::clamp ( 15U, 1, 10. ));
short foo = 50;
BOOST_CHECK_EQUAL ( 56, ba::clamp ( foo, 56.9, 129 ));
BOOST_CHECK_EQUAL ( 24910, ba::clamp ( foo, 12345678, 123456999 ));
}
void test_floats()
{
// Inside the range, equal to the endpoints, and outside the endpoints.
BOOST_CHECK_EQUAL ( 3.0, ba::clamp ( 3.0, 1.0, 10.0 ));
BOOST_CHECK_EQUAL ( 1.0, ba::clamp ( 1.0, 1.0, 10.0 ));
BOOST_CHECK_EQUAL ( 1.0, ba::clamp ( 0.0, 1.0, 10.0 ));
BOOST_CHECK_EQUAL ( 10.0, ba::clamp ( 10.0, 1.0, 10.0 ));
BOOST_CHECK_EQUAL ( 10.0, ba::clamp ( 11.0, 1.0, 10.0 ));
BOOST_CHECK_EQUAL ( 3.0, ba::clamp ( 3.0, 10.0, 1.0, doubleGreater ));
BOOST_CHECK_EQUAL ( 1.0, ba::clamp ( 1.0, 10.0, 1.0, doubleGreater ));
BOOST_CHECK_EQUAL ( 1.0, ba::clamp ( 0.0, 10.0, 1.0, doubleGreater ));
BOOST_CHECK_EQUAL ( 10.0, ba::clamp ( 10.0, 10.0, 1.0, doubleGreater ));
BOOST_CHECK_EQUAL ( 10.0, ba::clamp ( 11.0, 10.0, 1.0, doubleGreater ));
// Negative numbers
BOOST_CHECK_EQUAL ( -3.f, ba::clamp ( -3.f, -10.f, -1.f ));
BOOST_CHECK_EQUAL ( -1.f, ba::clamp ( -1.f, -10.f, -1.f ));
BOOST_CHECK_EQUAL ( -1.f, ba::clamp ( 0.f, -10.f, -1.f ));
BOOST_CHECK_EQUAL ( -10.f, ba::clamp ( -10.f, -10.f, -1.f ));
BOOST_CHECK_EQUAL ( -10.f, ba::clamp ( -11.f, -10.f, -1.f ));
// Mixed positive and negative numbers
BOOST_CHECK_EQUAL ( 5.f, ba::clamp ( 5.f, -10.f, 10.f ));
BOOST_CHECK_EQUAL ( -10.f, ba::clamp ( -10.f, -10.f, 10.f ));
BOOST_CHECK_EQUAL ( -10.f, ba::clamp ( -15.f, -10.f, 10.f ));
BOOST_CHECK_EQUAL ( 10.f, ba::clamp ( 10.f, -10.f, 10.f ));
BOOST_CHECK_EQUAL ( 10.f, ba::clamp ( 15.f, -10.f, 10.f ));
// Mixed (1)
BOOST_CHECK_EQUAL ( 5.f, ba::clamp ( 5.f, -10., 10. ));
BOOST_CHECK_EQUAL ( -10.f, ba::clamp ( -10.f, -10., 10. ));
BOOST_CHECK_EQUAL ( -10.f, ba::clamp ( -15.f, -10., 10. ));
BOOST_CHECK_EQUAL ( 10.f, ba::clamp ( 10.f, -10., 10. ));
BOOST_CHECK_EQUAL ( 10.f, ba::clamp ( 15.f, -10., 10. ));
// Mixed (2)
BOOST_CHECK_EQUAL ( 5.f, ba::clamp ( 5.f, -10, 10 ));
BOOST_CHECK_EQUAL ( -10.f, ba::clamp ( -10.f, -10, 10 ));
BOOST_CHECK_EQUAL ( -10.f, ba::clamp ( -15.f, -10, 10 ));
BOOST_CHECK_EQUAL ( 10.f, ba::clamp ( 10.f, -10, 10 ));
BOOST_CHECK_EQUAL ( 10.f, ba::clamp ( 15.f, -10, 10 ));
}
void test_custom()
{
// Inside the range, equal to the endpoints, and outside the endpoints.
BOOST_CHECK_EQUAL ( custom( 3), ba::clamp ( custom( 3), custom(1), custom(10)));
BOOST_CHECK_EQUAL ( custom( 1), ba::clamp ( custom( 1), custom(1), custom(10)));
BOOST_CHECK_EQUAL ( custom( 1), ba::clamp ( custom( 0), custom(1), custom(10)));
BOOST_CHECK_EQUAL ( custom(10), ba::clamp ( custom(10), custom(1), custom(10)));
BOOST_CHECK_EQUAL ( custom(10), ba::clamp ( custom(11), custom(1), custom(10)));
BOOST_CHECK_EQUAL ( custom( 3), ba::clamp ( custom( 3), custom(1), custom(10), customLess ));
BOOST_CHECK_EQUAL ( custom( 1), ba::clamp ( custom( 1), custom(1), custom(10), customLess ));
BOOST_CHECK_EQUAL ( custom( 1), ba::clamp ( custom( 0), custom(1), custom(10), customLess ));
BOOST_CHECK_EQUAL ( custom(10), ba::clamp ( custom(10), custom(1), custom(10), customLess ));
BOOST_CHECK_EQUAL ( custom(10), ba::clamp ( custom(11), custom(1), custom(10), customLess ));
// Fail!!
// BOOST_CHECK_EQUAL ( custom(1), ba::clamp ( custom(11), custom(1), custom(10)));
}
#define elementsof(v) (sizeof (v) / sizeof (v[0]))
#define a_begin(v) (&v[0])
#define a_end(v) (v + elementsof (v))
#define a_range(v) v
#define b_e(v) a_begin(v),a_end(v)
void test_int_range ()
{
int inputs [] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 19, 99, 999, -1, -3, -99, 234234 };
int outputs [] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 10, -1, -1, -1, 10 };
std::vector<int> results;
std::vector<int> in_v;
std::copy ( a_begin(inputs), a_end(inputs), std::back_inserter ( in_v ));
ba::clamp_range ( a_begin(inputs), a_end(inputs), std::back_inserter ( results ), -1, 10 );
BOOST_CHECK ( std::equal ( results.begin(), results.end (), outputs ));
results.clear ();
ba::clamp_range ( in_v.begin (), in_v.end (), std::back_inserter ( results ), -1, 10 );
BOOST_CHECK ( std::equal ( results.begin(), results.end (), outputs ));
results.clear ();
ba::clamp_range ( a_begin(inputs), a_end(inputs), std::back_inserter ( results ), 10, -1, intGreater );
BOOST_CHECK ( std::equal ( results.begin(), results.end (), outputs ));
results.clear ();
ba::clamp_range ( in_v.begin (), in_v.end (), std::back_inserter ( results ), 10, -1, intGreater );
BOOST_CHECK ( std::equal ( results.begin(), results.end (), outputs ));
results.clear ();
ba::clamp_range ( a_range(inputs), std::back_inserter ( results ), -1, 10 );
BOOST_CHECK ( std::equal ( results.begin(), results.end (), outputs ));
results.clear ();
ba::clamp_range ( in_v, std::back_inserter ( results ), -1, 10 );
BOOST_CHECK ( std::equal ( results.begin(), results.end (), outputs ));
results.clear ();
ba::clamp_range ( a_range(inputs), std::back_inserter ( results ), 10, -1, intGreater );
BOOST_CHECK ( std::equal ( results.begin(), results.end (), outputs ));
results.clear ();
ba::clamp_range ( in_v, std::back_inserter ( results ), 10, -1, intGreater );
BOOST_CHECK ( std::equal ( results.begin(), results.end (), outputs ));
results.clear ();
int junk[elementsof(inputs)];
ba::clamp_range ( inputs, junk, 10, -1, intGreater );
BOOST_CHECK ( std::equal ( b_e(junk), outputs ));
}
void test_constexpr()
{
// Inside the range, equal to the endpoints, and outside the endpoints.
{
BOOST_CXX14_CONSTEXPR bool check_inside = (3 == ba::clamp ( 3, 1, 10 ));
BOOST_CHECK(check_inside);
BOOST_CXX14_CONSTEXPR bool check_min = (1 == ba::clamp ( 1, 1, 10 ));
BOOST_CHECK(check_min);
BOOST_CXX14_CONSTEXPR bool check_min_out = (1 == ba::clamp ( 0, 1, 10 ));
BOOST_CHECK(check_min_out);
BOOST_CXX14_CONSTEXPR bool check_max = (10 == ba::clamp ( 10, 1, 10 ));
BOOST_CHECK(check_max);
BOOST_CXX14_CONSTEXPR bool check_max_out = (10 == ba::clamp ( 11, 1, 10 ));
BOOST_CHECK(check_max_out);
}
{
BOOST_CXX14_CONSTEXPR bool check_inside = (3 == ba::clamp ( 3, 10, 1, intGreater ));
BOOST_CHECK(check_inside);
BOOST_CXX14_CONSTEXPR bool check_min = (1 == ba::clamp ( 1, 10, 1, intGreater ));
BOOST_CHECK(check_min);
BOOST_CXX14_CONSTEXPR bool check_min_out = (1 == ba::clamp ( 0, 10, 1, intGreater ));
BOOST_CHECK(check_min_out);
BOOST_CXX14_CONSTEXPR bool check_max = (10 == ba::clamp ( 10, 10, 1, intGreater ));
BOOST_CHECK(check_max);
BOOST_CXX14_CONSTEXPR bool check_max_out = (10 == ba::clamp ( 11, 10, 1, intGreater ));
BOOST_CHECK(check_max_out);
}
// Negative numbers
{
BOOST_CXX14_CONSTEXPR bool check_inside = (-3 == ba::clamp ( -3, -10, -1 ));
BOOST_CHECK(check_inside);
BOOST_CXX14_CONSTEXPR bool check_max = (-1 == ba::clamp ( -1, -10, -1 ));
BOOST_CHECK(check_max);
BOOST_CXX14_CONSTEXPR bool check_max_out = (-1 == ba::clamp ( 0, -10, -1 ));
BOOST_CHECK(check_max_out);
BOOST_CXX14_CONSTEXPR bool check_min = (-10 == ba::clamp ( -10, -10, -1 ));
BOOST_CHECK(check_min);
BOOST_CXX14_CONSTEXPR bool check_min_out = (-10 == ba::clamp ( -11, -10, -1 ));
BOOST_CHECK(check_min_out);
}
// Mixed positive and negative numbers
{
BOOST_CXX14_CONSTEXPR bool check_inside = (5 == ba::clamp ( 5, -10, 10 ));
BOOST_CHECK(check_inside);
BOOST_CXX14_CONSTEXPR bool check_min = (-10 == ba::clamp ( -10, -10, 10 ));
BOOST_CHECK(check_min);
BOOST_CXX14_CONSTEXPR bool check_min_out = (-10 == ba::clamp ( -15, -10, 10 ));
BOOST_CHECK(check_min_out);
BOOST_CXX14_CONSTEXPR bool check_max = (10 == ba::clamp ( 10, -10, 10 ));
BOOST_CHECK(check_max);
BOOST_CXX14_CONSTEXPR bool check_max_out = (10 == ba::clamp ( 15, -10, 10 ));
BOOST_CHECK(check_max_out);
}
// Unsigned
{
BOOST_CXX14_CONSTEXPR bool check_inside = (5U == ba::clamp ( 5U, 1U, 10U ));
BOOST_CHECK(check_inside);
BOOST_CXX14_CONSTEXPR bool check_min = (1U == ba::clamp ( 1U, 1U, 10U ));
BOOST_CHECK(check_min);
BOOST_CXX14_CONSTEXPR bool check_min_out = (1U == ba::clamp ( 0U, 1U, 10U ));
BOOST_CHECK(check_min_out);
BOOST_CXX14_CONSTEXPR bool check_max = (10U == ba::clamp ( 10U, 1U, 10U ));
BOOST_CHECK(check_max);
BOOST_CXX14_CONSTEXPR bool check_max_out = (10U == ba::clamp ( 15U, 1U, 10U ));
BOOST_CHECK(check_max_out);
}
// Mixed (1)
{
BOOST_CXX14_CONSTEXPR bool check_inside = (5U == ba::clamp ( 5U, 1, 10 ));
BOOST_CHECK(check_inside);
BOOST_CXX14_CONSTEXPR bool check_min = (1U == ba::clamp ( 1U, 1, 10 ));
BOOST_CHECK(check_min);
BOOST_CXX14_CONSTEXPR bool check_min_out = (1U == ba::clamp ( 0U, 1, 10 ));
BOOST_CHECK(check_min_out);
BOOST_CXX14_CONSTEXPR bool check_max = (10U == ba::clamp ( 10U, 1, 10 ));
BOOST_CHECK(check_max);
BOOST_CXX14_CONSTEXPR bool check_max_out = (10U == ba::clamp ( 15U, 1, 10 ));
BOOST_CHECK(check_max_out);
}
// Mixed (3)
{
BOOST_CXX14_CONSTEXPR bool check_inside = (5U == ba::clamp ( 5U, 1, 10. ));
BOOST_CHECK(check_inside);
BOOST_CXX14_CONSTEXPR bool check_min = (1U == ba::clamp ( 1U, 1, 10. ));
BOOST_CHECK(check_min);
BOOST_CXX14_CONSTEXPR bool check_min_out = (1U == ba::clamp ( 0U, 1, 10. ));
BOOST_CHECK(check_min_out);
BOOST_CXX14_CONSTEXPR bool check_max = (10U == ba::clamp ( 10U, 1, 10. ));
BOOST_CHECK(check_max);
BOOST_CXX14_CONSTEXPR bool check_max_out = (10U == ba::clamp ( 15U, 1, 10. ));
BOOST_CHECK(check_max_out);
}
{
BOOST_CXX14_CONSTEXPR short foo = 50;
BOOST_CXX14_CONSTEXPR bool check_float = ( 56 == ba::clamp ( foo, 56.9, 129 ));
BOOST_CHECK(check_float);
BOOST_CXX14_CONSTEXPR bool check_over = ( 24910 == ba::clamp ( foo, 12345678, 123456999 ));
BOOST_CHECK(check_over);
}
}
BOOST_AUTO_TEST_CASE( test_main )
{
test_ints ();
test_floats ();
test_custom ();
test_int_range ();
test_constexpr ();
// test_float_range ();
// test_custom_range ();
}
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