ViennaCL - The Vienna Computing Library  1.7.0
Free open-source GPU-accelerated linear algebra and solver library.
slice.hpp
Go to the documentation of this file.
1 #ifndef VIENNACL_SLICE_HPP_
2 #define VIENNACL_SLICE_HPP_
3 
4 /* =========================================================================
5  Copyright (c) 2010-2015, Institute for Microelectronics,
6  Institute for Analysis and Scientific Computing,
7  TU Wien.
8  Portions of this software are copyright by UChicago Argonne, LLC.
9 
10  -----------------
11  ViennaCL - The Vienna Computing Library
12  -----------------
13 
14  Project Head: Karl Rupp rupp@iue.tuwien.ac.at
15 
16  (A list of authors and contributors can be found in the manual)
17 
18  License: MIT (X11), see file LICENSE in the base directory
19 ============================================================================= */
20 
25 #include <vector>
26 #include <stddef.h>
27 #include <assert.h>
28 #include "viennacl/forwards.h"
29 
30 namespace viennacl
31 {
32 
37 template<typename SizeT /* see forwards.h for default argument*/,
38  typename DistanceT /* see forwards.h for default argument*/>
39 class basic_slice
40 {
41 public:
42  typedef SizeT size_type;
43  typedef DistanceT difference_type;
44  typedef size_type value_type;
45  typedef value_type const_reference;
46  typedef const_reference reference;
47 
48  basic_slice() : start_(0), stride_(1), size_(0) {}
49  basic_slice(size_type start_index,
50  size_type stride_arg,
51  size_type size_arg) : start_(start_index), stride_(stride_arg), size_(size_arg) {}
52 
53 
54  size_type start() const { return start_; }
55  size_type stride() const { return stride_; }
56  size_type size() const { return size_; }
57 
58  const_reference operator()(size_type i) const
59  {
60  assert(i < size());
61  return start_ + i * stride_;
62  }
63  const_reference operator[](size_type i) const { return operator()(i); }
64 
65  bool operator==(const basic_slice & s) const { return (start_ == s.start_) && (stride_ == s.stride_) && (size_ == s.size_); }
66  bool operator!=(const basic_slice & s) const { return !(*this == s); }
67 
68 private:
69  size_type start_;
70  size_type stride_;
71  size_type size_;
72 };
73 
74 
75 }
76 
77 #endif
const_reference reference
Definition: slice.hpp:46
bool operator==(const basic_slice &s) const
Definition: slice.hpp:65
const_reference operator[](size_type i) const
Definition: slice.hpp:63
size_type size() const
Definition: slice.hpp:56
size_type value_type
Definition: slice.hpp:44
This file provides the forward declarations for the main types used within ViennaCL.
bool operator!=(const basic_slice &s) const
Definition: slice.hpp:66
Main namespace in ViennaCL. Holds all the basic types such as vector, matrix, etc. and defines operations upon them.
Definition: cpu_ram.hpp:34
size_type start() const
Definition: slice.hpp:54
basic_slice(size_type start_index, size_type stride_arg, size_type size_arg)
Definition: slice.hpp:49
size_type stride() const
Definition: slice.hpp:55
value_type const_reference
Definition: slice.hpp:45
A slice class that refers to an interval [start, stop), where 'start' is included, and 'stop' is excluded.
Definition: forwards.h:429
const_reference operator()(size_type i) const
Definition: slice.hpp:58
DistanceT difference_type
Definition: slice.hpp:43