/* static */ RTCString RTCString::joinEx(const RTCList<RTCString, RTCString *> &a_rList, const RTCString &a_rstrPrefix /* = "" */, const RTCString &a_rstrSep /* = "" */) { RTCString strRet; if (a_rList.size() > 1) { /* calc the required size */ size_t cbNeeded = a_rstrSep.length() * (a_rList.size() - 1) + 1; cbNeeded += a_rstrPrefix.length() * (a_rList.size() - 1) + 1; for (size_t i = 0; i < a_rList.size(); ++i) cbNeeded += a_rList.at(i).length(); strRet.reserve(cbNeeded); /* do the appending. */ for (size_t i = 0; i < a_rList.size() - 1; ++i) { if (a_rstrPrefix.isNotEmpty()) strRet.append(a_rstrPrefix); strRet.append(a_rList.at(i)); strRet.append(a_rstrSep); } strRet.append(a_rList.last()); } /* special case: one list item. */ else if (a_rList.size() > 0) { if (a_rstrPrefix.isNotEmpty()) strRet.append(a_rstrPrefix); strRet.append(a_rList.last()); } return strRet; }