Function evaluateString

src/bzfs/bzfs.cpp:1733–1799

static std::string evaluateString(const std::string& raw) {
  std::string eval;
  const int rawLen = (int)raw.size();
  for (int i = 0; i < rawLen; i++) {
    char current = raw[i];
    if (current != '\\') {
      eval += current;
    }
    else {
      char next = raw[i + 1];
      switch (next) {
        case '\\' : {
          eval += '\\';
          i++;
          break;
        }
        case 'n' : {
          eval += "\\n";
          i++;
          break;
        }
        case '{' : {
          unsigned int start = (i + 2);
          std::string::size_type end = raw.find_first_of('}', start);
          if (end == std::string::npos) {
            i = rawLen; // unterminated, ignore the rest of the string
          }
          else {
            const std::string var = raw.substr(start, end - start);
            i += (end - start) + 2;
            if (BZDB.isSet(var)) {
              eval += BZDB.get(var);
            }
            else {
              eval += "*BADBZDB*";
            }
          }
          break;
        }
        case '(' : {
          unsigned int start = (i + 2);
          std::string::size_type end = raw.find_first_of(')', start);
          if (end == std::string::npos) {
            i = rawLen; // unterminated, ignore the rest of the string
          }
          else {
            const std::string var = raw.substr(start, end - start);
            i += (end - start) + 2;
            if (var == "uptime") {
              char buffer[16];
              const float uptime = (float)(BzTime::getCurrent() - BzTime::getStartTime());
              snprintf(buffer, 16, "%i", (int)uptime);
              eval += buffer;
            }
            else {
              eval += "*BADVAR*";
            }
          }