1 //---------------------------------------------------------------------------//
2 // Copyright (c) 2013 Kyle Lutz <kyle.r.lutz@gmail.com>
3 //
4 // Distributed under the Boost Software License, Version 1.0
5 // See accompanying file LICENSE_1_0.txt or copy at
6 // http://www.boost.org/LICENSE_1_0.txt
7 //
8 // See http://boostorg.github.com/compute for more information.
9 //---------------------------------------------------------------------------//
10
11 #ifndef BOOST_COMPUTE_ALGORITHM_REMOVE_HPP
12 #define BOOST_COMPUTE_ALGORITHM_REMOVE_HPP
13
14 #include <boost/static_assert.hpp>
15
16 #include <boost/compute/lambda.hpp>
17 #include <boost/compute/system.hpp>
18 #include <boost/compute/algorithm/remove_if.hpp>
19 #include <boost/compute/type_traits/vector_size.hpp>
20 #include <boost/compute/type_traits/is_device_iterator.hpp>
21
22 namespace boost {
23 namespace compute {
24
25 /// Removes each element equal to \p value in the range [\p first,
26 /// \p last).
27 ///
28 /// Space complexity: \Omega(3n)
29 ///
30 /// \see remove_if()
31 template<class Iterator, class T>
remove(Iterator first,Iterator last,const T & value,command_queue & queue=system::default_queue ())32 inline Iterator remove(Iterator first,
33 Iterator last,
34 const T &value,
35 command_queue &queue = system::default_queue())
36 {
37 BOOST_STATIC_ASSERT(is_device_iterator<Iterator>::value);
38 typedef typename std::iterator_traits<Iterator>::value_type value_type;
39
40 using ::boost::compute::_1;
41 using ::boost::compute::lambda::all;
42
43 if(vector_size<value_type>::value == 1){
44 return ::boost::compute::remove_if(first,
45 last,
46 _1 == value,
47 queue);
48 }
49 else {
50 return ::boost::compute::remove_if(first,
51 last,
52 all(_1 == value),
53 queue);
54 }
55 }
56
57 } // end compute namespace
58 } // end boost namespace
59
60 #endif // BOOST_COMPUTE_ALGORITHM_REMOVE_HPP
61