+ std::string::size_type colon = parameter.find(':');
+ if (colon == std::string::npos)
+ return MODEACTION_DENY;
+
+ std::string duration = parameter.substr(colon+1);
+ if ((IS_LOCAL(source)) && ((duration.length() > 10) || (!IsValidDuration(duration))))
+ return MODEACTION_DENY;
+
+ unsigned int len = ConvToInt(parameter.substr(0, colon));
+ int time = ServerInstance->Duration(duration);
+ if (len == 0 || time < 0)
+ return MODEACTION_DENY;
+ if (len > maxlines && IS_LOCAL(source))
+ return MODEACTION_DENY;
+ if (len > maxlines)
+ len = maxlines;
+ if (parameter == channel->GetModeParameter(this))
+ return MODEACTION_DENY;
+
+ HistoryList* history = ext.get(channel);
+ if (history)
+ {
+ // Shrink the list if the new line number limit is lower than the old one
+ if (len < history->lines.size())
+ history->lines.erase(history->lines.begin(), history->lines.begin() + (history->lines.size() - len));
+
+ history->maxlen = len;
+ history->maxtime = time;
+ }
+ else
+ {
+ ext.set(channel, new HistoryList(len, time));
+ }