+bool irc::insensitive_swo::operator()(const std::string& a, const std::string& b) const
+{
+ const unsigned char* charmap = national_case_insensitive_map;
+ std::string::size_type asize = a.size();
+ std::string::size_type bsize = b.size();
+ std::string::size_type maxsize = std::min(asize, bsize);
+
+ for (std::string::size_type i = 0; i < maxsize; i++)
+ {
+ unsigned char A = charmap[(unsigned char)a[i]];
+ unsigned char B = charmap[(unsigned char)b[i]];
+ if (A > B)
+ return false;
+ else if (A < B)
+ return true;
+ }
+ return (asize < bsize);
+}
+
+size_t irc::insensitive::operator()(const std::string &s) const
+{
+ /* XXX: NO DATA COPIES! :)
+ * The hash function here is practically
+ * a copy of the one in STL's hash_fun.h,
+ * only with *x replaced with national_case_insensitive_map[*x].
+ * This avoids a copy to use hash<const char*>
+ */
+ register size_t t = 0;
+ for (std::string::const_iterator x = s.begin(); x != s.end(); ++x) /* ++x not x++, as its faster */
+ t = 5 * t + national_case_insensitive_map[(unsigned char)*x];
+ return t;
+}
+