+void Channel::SetPrefix(User* user, char prefix, unsigned int prefix_value, bool adding)
+{
+ prefixlist::iterator n = prefixes.find(user);
+ prefixtype pfx = std::make_pair(prefix,prefix_value);
+ if (adding)
+ {
+ if (n != prefixes.end())
+ {
+ if (std::find(n->second.begin(), n->second.end(), pfx) == n->second.end())
+ {
+ n->second.push_back(pfx);
+ /* We must keep prefixes in rank order, largest first.
+ * This is for two reasons, firstly because x-chat *ass-u-me's* this
+ * state, and secondly it turns out to be a benefit to us later.
+ * See above in GetPrefix().
+ */
+ std::sort(n->second.begin(), n->second.end(), ModeParser::PrefixComparison);
+ }
+ }
+ else
+ {
+ pfxcontainer one;
+ one.push_back(pfx);
+ prefixes.insert(std::make_pair<User*,pfxcontainer>(user, one));
+ }
+ }
+ else
+ {
+ if (n != prefixes.end())
+ {
+ pfxcontainer::iterator x = std::find(n->second.begin(), n->second.end(), pfx);
+ if (x != n->second.end())
+ n->second.erase(x);
+ }
+ }
+}