StringUtils.cpp

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#include "StringUtils.h"
 
#include <algorithm>
#include <cctype>
#include <regex>
#include <sstream>
#include <string>
#include <utility>
#include <vector>
 
namespace core::utils {
 
std::string trim(std::string s) {
  const auto notSpace = [](unsigned char c) {
    return !std::isspace(c);
  };
  s.erase(s.begin(), std::find_if(s.begin(), s.end(), notSpace));
  s.erase(std::find_if(s.rbegin(), s.rend(), notSpace).base(), s.end());
  return s;
}
 
std::string lowerAscii(std::string s) {
  for (auto& ch : s)
    ch = static_cast<char>(std::tolower(static_cast<unsigned char>(ch)));
  return s;
}
 
std::string collapseWhitespace(std::string s) {
  static const std::regex spacesRe(R"(\s+)");
  s = std::regex_replace(std::move(s), spacesRe, " ");
  return trim(std::move(s));
}
 
std::vector<std::string> splitWhitespace(const std::string& s) {
  std::istringstream iss(s);
  std::vector<std::string> out;
  std::string t;
  while (iss >> t)
    out.push_back(std::move(t));
  return out;
}
 
} // namespace core::utils