Function ParseOSReleaseLine

Source/cmCMakeHostSystemInformationCommand.cxx:220–326

}

cm::optional<std::pair<std::string, std::string>> ParseOSReleaseLine(
  std::string const& line)
{
  std::string key;
  std::string value;

  char prev = 0;
  enum ParserState
  {
    PARSE_KEY_1ST,
    PARSE_KEY,
    FOUND_EQ,
    PARSE_SINGLE_QUOTE_VALUE,
    PARSE_DBL_QUOTE_VALUE,
    PARSE_VALUE,
    IGNORE_REST
  } state = PARSE_KEY_1ST;

  for (auto ch : line) {
    switch (state) {
      case PARSE_KEY_1ST:
        if (cmsysString_isalpha(ch) || ch == '_') {
          key += ch;
          state = PARSE_KEY;
        } else if (!cmsysString_isspace(ch)) {
          state = IGNORE_REST;
        }
        break;

      case PARSE_KEY:
        if (ch == '=') {
          state = FOUND_EQ;
        } else if (cmsysString_isalnum(ch) || ch == '_') {
          key += ch;
        } else {
          state = IGNORE_REST;
        }
        break;

      case FOUND_EQ:
        switch (ch) {
          case '\'':
            state = PARSE_SINGLE_QUOTE_VALUE;
            break;
          case '"':
            state = PARSE_DBL_QUOTE_VALUE;
            break;
          case '#':
          case '\\':
            state = IGNORE_REST;
            break;
          default:
            value += ch;
            state = PARSE_VALUE;
        }
        break;

      case PARSE_SINGLE_QUOTE_VALUE: