split_string.h

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// Copyright 2002-2021 CEA LIST
// SPDX-FileCopyrightText: 2022 CEA LIST <gael.de-chalendar@cea.fr>
//
// SPDX-License-Identifier: MIT
 
#ifndef DEEPLIMA_INCLUDE_SPLIT_STR_H
#define DEEPLIMA_INCLUDE_SPLIT_STR_H
 
#include <string>
#include <vector>
#include <cstdlib>
#include <stdexcept>
#include <limits>
 
namespace deeplima
{
namespace utils
{
 
inline std::vector<std::string> split(const std::string &str, char delim)
{
  size_t start;
  size_t end = 0;
  std::vector<std::string> parts;
 
  while ((start = str.find_first_not_of(delim, end)) != std::string::npos)
  {
    end = str.find(delim, start);
    parts.push_back(str.substr(start, end - start));
  }
 
  return parts;
}
 
inline std::vector<size_t> split_list_of_nums(const std::string &str, char delim)
{
  std::vector<std::string> temp = split(str, delim);
  std::vector<size_t> res;
  res.reserve(temp.size());
 
  for (const std::string& s : temp)
  {
    char *p_end = nullptr;
    long int t = strtol(s.c_str(), &p_end, 10);
    if (p_end != s.data() + s.size())
    {
      throw std::range_error("Can't parse \"" + str + "\"");
    }
    if (t <= 0)
    {
      throw std::range_error("Can't parse \"" + str + "\": value " + std::to_string(t) + " must be > 0");
    }
    if (size_t(t) >= std::numeric_limits<size_t>::max())
    {
      throw std::range_error("Can't parse \"" + str + "\": value " + std::to_string(t) + " is too high");
    }
    res.push_back(size_t(t));
  }
 
  return res;
}
 
template< class InputIt, class Pred >
inline std::string join(InputIt begin, InputIt end, Pred f)
{
  std::string s;
  for (auto i = begin; i != end; ++i)
  {
    if (s.size() > 0)
    {
      s += " ";
    }
    s += f(*i);
  }
  return s;
}
 
} // namespace utils
} // namespace deeplima
 
#endif