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Intial checkin of 'clamp' algorithm

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[SVN r54414]
This commit is contained in:
Marshall Clow
2009-06-27 19:53:55 +00:00
parent 40de115990
commit 1a11c579d6
3 changed files with 174 additions and 0 deletions
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clamp/test/Jamfile.v2 Normal file
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# Boost.All Library test Jamfile
#
# Copyright (C) 2009 Jesse Williamson
#
# Use, modification, and distribution is 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)
#
import testing ;
{
test-suite algorithm/clamp:
: [ run clamp_test.cpp
: : : : clamp ]
;
}

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clamp/test/clamp_test.cpp Normal file
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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 <boost/config.hpp>
#include <boost/algorithm/clamp.hpp>
#include <boost/test/included/test_exec_monitor.hpp>
namespace ba = boost::algorithm;
void test_ints()
{
// Inside the range, equal to the endpoints, and outside the endpoints.
BOOST_CHECK_EQUAL ( 3, ba::clamp ( 1, 10, 3 ));
BOOST_CHECK_EQUAL ( 1, ba::clamp ( 1, 10, 1 ));
BOOST_CHECK_EQUAL ( 1, ba::clamp ( 1, 10, 0 ));
BOOST_CHECK_EQUAL ( 10, ba::clamp ( 1, 10, 10 ));
BOOST_CHECK_EQUAL ( 10, ba::clamp ( 1, 10, 11 ));
// Negative numbers
BOOST_CHECK_EQUAL ( -3, ba::clamp ( -10, -1, -3 ));
BOOST_CHECK_EQUAL ( -1, ba::clamp ( -10, -1, -1 ));
BOOST_CHECK_EQUAL ( -1, ba::clamp ( -10, -1, 0 ));
BOOST_CHECK_EQUAL ( -10, ba::clamp ( -10, -1, -10 ));
BOOST_CHECK_EQUAL ( -10, ba::clamp ( -10, -1, -11 ));
// Mixed positive and negative numbers
BOOST_CHECK_EQUAL ( 5, ba::clamp ( -10, 10, 5 ));
BOOST_CHECK_EQUAL ( -10, ba::clamp ( -10, 10, -10 ));
BOOST_CHECK_EQUAL ( -10, ba::clamp ( -10, 10, -15 ));
BOOST_CHECK_EQUAL ( 10, ba::clamp ( -10, 10, 10 ));
BOOST_CHECK_EQUAL ( 10, ba::clamp ( -10, 10, 15 ));
// Unsigned
BOOST_CHECK_EQUAL ( 5U, ba::clamp ( 1U, 10U, 5U ));
BOOST_CHECK_EQUAL ( 1U, ba::clamp ( 1U, 10U, 1U ));
BOOST_CHECK_EQUAL ( 1U, ba::clamp ( 1U, 10U, 0U ));
BOOST_CHECK_EQUAL ( 10U, ba::clamp ( 1U, 10U, 10U ));
BOOST_CHECK_EQUAL ( 10U, ba::clamp ( 1U, 10U, 15U ));
}
void test_floats()
{
// Inside the range, equal to the endpoints, and outside the endpoints.
BOOST_CHECK_EQUAL ( 3.0, ba::clamp ( 1.0, 10.0, 3.0 ));
BOOST_CHECK_EQUAL ( 1.0, ba::clamp ( 1.0, 10.0, 1.0 ));
BOOST_CHECK_EQUAL ( 1.0, ba::clamp ( 1.0, 10.0, 0.0 ));
BOOST_CHECK_EQUAL ( 10.0, ba::clamp ( 1.0, 10.0, 10.0 ));
BOOST_CHECK_EQUAL ( 10.0, ba::clamp ( 1.0, 10.0, 11.0 ));
// Negative numbers
BOOST_CHECK_EQUAL ( -3.f, ba::clamp ( -10.f, -1.f, -3.f ));
BOOST_CHECK_EQUAL ( -1.f, ba::clamp ( -10.f, -1.f, -1.f ));
BOOST_CHECK_EQUAL ( -1.f, ba::clamp ( -10.f, -1.f, 0.f ));
BOOST_CHECK_EQUAL ( -10.f, ba::clamp ( -10.f, -1.f, -10.f ));
BOOST_CHECK_EQUAL ( -10.f, ba::clamp ( -10.f, -1.f, -11.f ));
// Mixed positive and negative numbers
BOOST_CHECK_EQUAL ( 5.f, ba::clamp ( -10.f, 10.f, 5.f ));
BOOST_CHECK_EQUAL ( -10.f, ba::clamp ( -10.f, 10.f, -10.f ));
BOOST_CHECK_EQUAL ( -10.f, ba::clamp ( -10.f, 10.f, -15.f ));
BOOST_CHECK_EQUAL ( 10.f, ba::clamp ( -10.f, 10.f, 10.f ));
BOOST_CHECK_EQUAL ( 10.f, ba::clamp ( -10.f, 10.f, 15.f ));
}
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; }
bool operator <= ( const custom &rhs ) const { return v <= rhs.v; }
bool operator >= ( const custom &rhs ) const { return v >= rhs.v; }
std::ostream & print ( std::ostream &os ) const { return os << v; }
private:
int v;
};
std::ostream & operator << ( std::ostream & os, const custom &x ) { return x.print ( os ); }
void test_custom()
{
// Inside the range, equal to the endpoints, and outside the endpoints.
BOOST_CHECK_EQUAL ( custom( 3), ba::clamp ( custom(1), custom(10), custom( 3)));
BOOST_CHECK_EQUAL ( custom( 1), ba::clamp ( custom(1), custom(10), custom( 1)));
BOOST_CHECK_EQUAL ( custom( 1), ba::clamp ( custom(1), custom(10), custom( 0)));
BOOST_CHECK_EQUAL ( custom(10), ba::clamp ( custom(1), custom(10), custom(10)));
BOOST_CHECK_EQUAL ( custom(10), ba::clamp ( custom(1), custom(10), custom(11)));
// Fail!!
// BOOST_CHECK_EQUAL ( custom(1), ba::clamp ( custom(1), custom(10), custom(11)));
}
int test_main( int , char* [] )
{
test_ints ();
test_floats ();
test_custom ();
return 0;
}