blob: 7cc4dc8e167a1af11674d04bdd0f991144426427 [file] [log] [blame]
Junxiao Shi4ce0bcf2016-09-03 07:09:03 +00001/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2/**
3 * Copyright (c) 2013-2016 Regents of the University of California.
4 *
5 * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
6 *
7 * ndn-cxx library is free software: you can redistribute it and/or modify it under the
8 * terms of the GNU Lesser General Public License as published by the Free Software
9 * Foundation, either version 3 of the License, or (at your option) any later version.
10 *
11 * ndn-cxx library is distributed in the hope that it will be useful, but WITHOUT ANY
12 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
13 * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
14 *
15 * You should have received copies of the GNU General Public License and GNU Lesser
16 * General Public License along with ndn-cxx, e.g., in COPYING.md file. If not, see
17 * <http://www.gnu.org/licenses/>.
18 *
19 * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
20 */
21
22#ifndef NDN_CXX_SECURITY_TRANSFORM_STRIP_SPACE_HPP
23#define NDN_CXX_SECURITY_TRANSFORM_STRIP_SPACE_HPP
24
25#include "transform-base.hpp"
26#include <bitset>
27#include <climits>
28
29namespace ndn {
30namespace security {
31namespace transform {
32
33/** \brief strip whitespace characters from a stream
34 *
35 * This transform interprets the input as a byte string, and puts all bytes except
36 * whitespace characters on the output.
37 */
38class StripSpace : public Transform
39{
40public:
41 static const char* const DEFAULT_WHITESPACES;
42
43 explicit
44 StripSpace(const char* whitespaces = DEFAULT_WHITESPACES);
45
46private:
47 virtual size_t
48 convert(const uint8_t* buf, size_t buflen) final;
49
50private:
51 static constexpr size_t CHARMAP_SIZE = 1 << CHAR_BIT;
52 std::bitset<CHARMAP_SIZE> m_isWhitespace; // char => whether char is whitespace
53};
54
55/** \brief constructs a StripSpace transform
56 * \param whitespaces characters classified as whitespaces, terminated with null
57 */
58unique_ptr<Transform>
59stripSpace(const char* whitespaces = StripSpace::DEFAULT_WHITESPACES);
60
61} // namespace transform
62} // namespace security
63} // namespace ndn
64
65#endif // NDN_CXX_SECURITY_TRANSFORM_STRIP_SPACE_HPP