return true;
}
+/*
+ * Create a string of form "foo!bar@fubar" given foo, bar and fubar
+ * as the parameters. If NULL, they become "*".
+ */
+#define NUH_BUFSIZE (NICKLEN + USERLEN + HOSTLEN + 10)
+static char *make_nick_user_host(char *namebuf, const char *nick,
+ const char *name, const char *host)
+{
+ snprintf(namebuf, NUH_BUFSIZE, "%s!%s@%s", nick, name, host);
+ return namebuf;
+}
+
+/*
+ * pretty_mask
+ *
+ * by Carlo Wood (Run), 05 Oct 1998.
+ *
+ * Canonify a mask.
+ *
+ * When the nick is longer then NICKLEN, it is cut off (its an error of course).
+ * When the user name or host name are too long (USERLEN and HOSTLEN
+ * respectively) then they are cut off at the start with a '*'.
+ *
+ * The following transformations are made:
+ *
+ * 1) xxx -> nick!*@*
+ * 2) xxx.xxx -> *!*@host
+ * 3) xxx!yyy -> nick!user@*
+ * 4) xxx@yyy -> *!user@host
+ * 5) xxx!yyy@zzz -> nick!user@host
+ */
+char *pretty_mask(char *mask)
+{
+ static char star[2] = { '*', 0 };
+ static char retmask[NUH_BUFSIZE] = "";
+ char *last_dot = NULL;
+ char *ptr = NULL;
+
+ /* Case 1: default */
+ char *nick = mask;
+ char *user = star;
+ char *host = star;
+
+ /* Do a _single_ pass through the characters of the mask: */
+ for (ptr = mask; *ptr; ++ptr)
+ {
+ if (*ptr == '!')
+ {
+ /* Case 3 or 5: Found first '!' (without finding a '@' yet) */
+ user = ++ptr;
+ host = star;
+ }
+ else if (*ptr == '@')
+ {
+ /* Case 4: Found last '@' (without finding a '!' yet) */
+ nick = star;
+ user = mask;
+ host = ++ptr;
+ }
+ else if (*ptr == '.')
+ {
+ /* Case 2: Found last '.' (without finding a '!' or '@' yet) */
+ last_dot = ptr;
+ continue;
+ }
+ else
+ continue;
+ for (; *ptr; ++ptr)
+ {
+ if (*ptr == '@')
+ {
+ /* Case 4 or 5: Found last '@' */
+ host = ptr + 1;
+ }
+ }
+ break;
+ }
+ if (user == star && last_dot)
+ {
+ /* Case 2: */
+ nick = star;
+ user = star;
+ host = mask;
+ }
+ /* Check lengths */
+ if (nick != star)
+ {
+ char *nick_end = (user != star) ? user - 1 : ptr;
+ if (nick_end - nick > NICKLEN)
+ nick[NICKLEN] = 0;
+ *nick_end = 0;
+ }
+ if (user != star)
+ {
+ char *user_end = (host != star) ? host - 1 : ptr;
+ if (user_end - user > USERLEN)
+ {
+ user = user_end - USERLEN;
+ *user = '*';
+ }
+ *user_end = 0;
+ }
+ if (host != star && ptr - host > HOSTLEN)
+ {
+ host = ptr - HOSTLEN;
+ *host = '*';
+ }
+ return make_nick_user_host(retmask, nick, user, host);
+}