Function parseConfigLine

src/tscore/MatcherUtils.cc:427–620

char* parseConfigLine(char* line, matcher_line* p_line, const matcher_tags* tags) Parse out a config file line suitable for passing to a ControlMatcher object If successful, nullptr is returned. If unsuccessful, a static error string is returned

//     a static error string is returned
//
const char *
parseConfigLine(char *line, matcher_line *p_line, const matcher_tags *tags)
{
  enum pState {
    FIND_LABEL,
    PARSE_LABEL,
    PARSE_VAL,
    START_PARSE_VAL,
    CONSUME,
  };

  pState       state       = FIND_LABEL;
  bool         inQuote     = false;
  char        *copyForward = nullptr;
  char        *copyFrom    = nullptr;
  char        *s           = line;
  char        *label       = nullptr;
  char        *val         = nullptr;
  int          num_el      = 0;
  matcher_type type        = MATCH_NONE;

  // Zero out the parsed line structure
  memset(p_line, 0, sizeof(matcher_line));

  if (*s == '\0') {
    return nullptr;
  }

  do {
    switch (state) {
    case FIND_LABEL:
      if (!isspace(*s)) {
        state = PARSE_LABEL;
        label = s;
      }
      s++;
      break;
    case PARSE_LABEL:
      if (*s == '=') {
        *s    = '\0';
        state = START_PARSE_VAL;
      }
      s++;
      break;
    case START_PARSE_VAL:
      // Init state needed for parsing values
      copyForward = nullptr;
      copyFrom    = nullptr;

      if (*s == '"') {
        inQuote = true;
        val     = s + 1;
      } else if (*s == '\\') {
        inQuote = false;
        val     = s + 1;
      } else {
        inQuote = false;
        val     = s;