otbStringUtils.h

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/*
 * Copyright (C) 2005-2022 Centre National d'Etudes Spatiales (CNES)
 *
 * This file is part of Orfeo Toolbox
 *
 *     https://www.orfeo-toolbox.org/
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
#ifndef otbStringUtils_h
#define otbStringUtils_h
 
 
#include <string>
#include <vector>
#include <limits>
#include <stdexcept>
 
#if defined(__GNUC__) || defined(__clang__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wshadow"
#pragma GCC diagnostic ignored "-Wunused-parameter"
#pragma GCC diagnostic ignored "-Wunused-local-typedefs"
#include <boost/lexical_cast.hpp>
#include <boost/algorithm/string.hpp>
#include <boost/algorithm/string/predicate.hpp>
#include <boost/utility/enable_if.hpp>
#pragma GCC diagnostic pop
#else
#include <boost/lexical_cast.hpp>
#include <boost/algorithm/string.hpp>
#include <boost/algorithm/string/predicate.hpp>
#include <boost/utility/enable_if.hpp>
#endif
 
namespace otb
{
namespace Utils
{
template <typename Res, typename In>
inline Res LexicalCast(In const& in, std::string const& kind)
{
  try
  {
    return boost::lexical_cast<Res>(in);
  }
  catch (boost::bad_lexical_cast&)
  {
    std::ostringstream oss;
    oss << "Cannot decode '" << in << "' as this is not a valid value for '" << kind << "'";
    throw std::runtime_error(oss.str());
  }
}
 
template <typename T>
void ConvertStringToVector(std::string const& str, T& ret, std::string const& errmsg, const char* delims = " ")
{
  typedef std::vector<boost::iterator_range<std::string::const_iterator>> ListType;
 
  ListType split;
 
  boost::split(split, str, boost::is_any_of(delims));
 
  for (size_t i = 0; i < split.size(); i++)
  {
    typename T::value_type value = LexicalCast<typename T::value_type>(split[i], errmsg);
    ret.push_back(value);
  }
}
 
template <typename T>
void SplitStringToSingleKeyValue(const std::string& str, std::string& key, T& value, const T& defValue, std::string const& errmsg,
                                 const std::string delims = "=")
{
 
  typedef boost::iterator_range<std::string::const_iterator> BoostRangeIteratorType;
  typedef std::list<BoostRangeIteratorType>                  ListType;
 
  ListType split;
 
  boost::split(split, str, boost::is_any_of(delims), boost::token_compress_on);
 
  typename ListType::iterator it  = split.begin();
  BoostRangeIteratorType      kIt = boost::trim_copy((*it));
  key.assign(kIt.begin(), kIt.end());
  ++it;
 
  if (it != split.end())
  {
    value = LexicalCast<T>(boost::trim_copy(*it), errmsg);
    ++it;
  }
  else
  {
    value = defValue;
  }
}
} // end namespace Utils
} // end namespace otb
 
#endif // otbStringUtils_h