Tidy up old-style slice syntax, and use string methods for CTCP parsing.

client/handlers.go

@@ -43,10 +43,10 @@ func (conn *Conn) dispatchEvent(line *Line) {
 	// handlers to cope with the possibilities.
 	if line.Cmd == "PRIVMSG" &&
 		len(line.Args[1]) > 2 &&
-		line.Args[1][0] == '\001' &&
-		line.Args[1][len(line.Args[1])-1] == '\001' {
+		strings.HasPrefix(line.Args[1], "\001") &&
+		strings.HasSuffix(line.Args[1], "\001") {
 		// WOO, it's a CTCP message
-		t := strings.SplitN(line.Args[1][1:len(line.Args[1])-1], " ", 2)
+		t := strings.SplitN(strings.Trim(line.Args[1], "\001"), " ", 2)
 		if len(t) > 1 {
 			// Replace the line with the unwrapped CTCP
 			line.Args[1] = t[1]
@@ -197,7 +197,7 @@ func (conn *Conn) h_QUIT(line *Line) {
 func (conn *Conn) h_MODE(line *Line) {
 	// channel modes first
 	if ch := conn.GetChannel(line.Args[0]); ch != nil {
-		conn.ParseChannelModes(ch, line.Args[1], line.Args[2:len(line.Args)])
+		conn.ParseChannelModes(ch, line.Args[1], line.Args[2:])
 	} else if n := conn.GetNick(line.Args[0]); n != nil {
 		// nick mode change, should be us
 		if n != conn.Me {
@@ -232,9 +232,8 @@ func (conn *Conn) h_311(line *Line) {
 
 // Handle 324 mode reply
 func (conn *Conn) h_324(line *Line) {
-	// XXX: copypasta from MODE, needs tidying.
 	if ch := conn.GetChannel(line.Args[1]); ch != nil {
-		conn.ParseChannelModes(ch, line.Args[2], line.Args[3:len(line.Args)])
+		conn.ParseChannelModes(ch, line.Args[2], line.Args[3:])
 	} else {
 		conn.error("irc.324(): buh? received MODE settings for unknown channel %s", line.Args[1])
 	}
@@ -281,7 +280,7 @@ func (conn *Conn) h_353(line *Line) {
 			}
 			switch c := nick[0]; c {
 			case '~', '&', '@', '%', '+':
-				nick = nick[1:len(nick)]
+				nick = nick[1:]
 				fallthrough
 			default:
 				n := conn.GetNick(nick)

client/line.go

@@ -22,10 +22,10 @@ func parseLine(s string) *Line {
 	if s[0] == ':' {
 		// remove a source and parse it
 		if idx := strings.Index(s, " "); idx != -1 {
-			line.Src, s = s[1:idx], s[idx+1:len(s)]
+			line.Src, s = s[1:idx], s[idx+1:]
 		} else {
 			// pretty sure we shouldn't get here ...
-			line.Src = s[1:len(s)]
+			line.Src = s[1:]
 			return line
 		}
 
@@ -33,9 +33,9 @@ func parseLine(s string) *Line {
 		line.Host = line.Src
 		nidx, uidx := strings.Index(line.Src, "!"), strings.Index(line.Src, "@")
 		if uidx != -1 && nidx != -1 {
-			line.Nick = line.Src[0:nidx]
+			line.Nick = line.Src[:nidx]
 			line.Ident = line.Src[nidx+1:uidx]
-			line.Host = line.Src[uidx+1 : len(line.Src)]
+			line.Host = line.Src[uidx+1:]
 		}
 	}
 
@@ -49,7 +49,7 @@ func parseLine(s string) *Line {
 	}
 	line.Cmd = strings.ToUpper(args[0])
 	if len(args) > 1 {
-		line.Args = args[1:len(args)]
+		line.Args = args[1:]
 	}
 	return line
 }

client/nickchan.go

@@ -127,14 +127,14 @@ func (conn *Conn) ParseChannelModes(ch *Channel, modes string, modeargs []string
 			ch.Modes.OperOnly = modeop
 		case 'k':
 			if len(modeargs) != 0 {
-				ch.Modes.Key, modeargs = modeargs[0], modeargs[1:len(modeargs)]
+				ch.Modes.Key, modeargs = modeargs[0], modeargs[1:]
 			} else {
 				conn.error("irc.ParseChanModes(): buh? not enough arguments to process MODE %s %s%s", ch.Name, modestr, m)
 			}
 		case 'l':
 			if len(modeargs) != 0 {
 				ch.Modes.Limit, _ = strconv.Atoi(modeargs[0])
-				modeargs = modeargs[1:len(modeargs)]
+				modeargs = modeargs[1:]
 			} else {
 				conn.error("irc.ParseChanModes(): buh? not enough arguments to process MODE %s %s%s", ch.Name, modestr, m)
 			}
@@ -154,7 +154,7 @@ func (conn *Conn) ParseChannelModes(ch *Channel, modes string, modeargs []string
 					case 'v':
 						p.Voice = modeop
 					}
-					modeargs = modeargs[1:len(modeargs)]
+					modeargs = modeargs[1:]
 				} else {
 					conn.error("irc.ParseChanModes(): MODE %s %s%s %s: buh? state tracking failure.", ch.Name, modestr, m, modeargs[0])
 				}