string_utils.hpp

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/* common.hpp                                                             */
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#pragma once
 
#include <cstring>
#include <ranges>
 
namespace kn::string_utils {
/** Trims a string */
inline std::string trim(const std::string_view& str) {
  auto isSpace = [](unsigned char c) { return std::isspace(c); };
  auto first = std::ranges::find_if_not(str, isSpace);
  if (first == str.end()) {
    return {};
  }
 
  auto last = std::ranges::find_if_not(std::views::reverse(str), isSpace);
  auto baseIt = last.base();
 
  return {first, baseIt};
}
 
/** Converts a string to lower case */
inline std::string to_lower(const std::string_view& str) {
  auto v = str | std::views::transform([](uint8_t c) { return static_cast<char>(std::tolower(c)); });
  return {v.begin(), v.end()};
}
}  // namespace kn::string_utils