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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/**
* Copyright (c) 2013-2016 Regents of the University of California.
*
* This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
*
* ndn-cxx library is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later version.
*
* ndn-cxx library is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
*
* You should have received copies of the GNU General Public License and GNU Lesser
* General Public License along with ndn-cxx, e.g., in COPYING.md file. If not, see
* <http://www.gnu.org/licenses/>.
*
* See AUTHORS.md for complete list of ndn-cxx authors and contributors.
*/
#ifndef NDN_CXX_SECURITY_TRANSFORM_STRIP_SPACE_HPP
#define NDN_CXX_SECURITY_TRANSFORM_STRIP_SPACE_HPP
#include "transform-base.hpp"
#include <bitset>
#include <climits>
namespace ndn {
namespace security {
namespace transform {
/** \brief strip whitespace characters from a stream
*
* This transform interprets the input as a byte string, and puts all bytes except
* whitespace characters on the output.
*/
class StripSpace : public Transform
{
public:
static const char* const DEFAULT_WHITESPACES;
explicit
StripSpace(const char* whitespaces = DEFAULT_WHITESPACES);
private:
virtual size_t
convert(const uint8_t* buf, size_t buflen) final;
private:
static constexpr size_t CHARMAP_SIZE = 1 << CHAR_BIT;
std::bitset<CHARMAP_SIZE> m_isWhitespace; // char => whether char is whitespace
};
/** \brief constructs a StripSpace transform
* \param whitespaces characters classified as whitespaces, terminated with null
*/
unique_ptr<Transform>
stripSpace(const char* whitespaces = StripSpace::DEFAULT_WHITESPACES);
} // namespace transform
} // namespace security
} // namespace ndn
#endif // NDN_CXX_SECURITY_TRANSFORM_STRIP_SPACE_HPP