Quit with Ctrl-Q

gilo.go

@@ -14,17 +14,29 @@ func isAscii(char rune) bool {
 }
 
 func isCtrl(char rune) bool {
-	if ! isAscii(char) {
+	if !isAscii(char) {
 		return false
 	}
 
-	ord:= int(char)
+	ord := int(char)
 
 	return ord == 0x7f || ord < 0x20
 }
 
-// Put the terminal in
-func goRaw() *term.State {
+// Return the input code of a Ctrl-key chord.
+func ctrlKey(char rune) rune {
+	ord := int(char)
+	raw := ord & 0x1f
+
+	if !isCtrl(rune(raw)) {
+		return 0
+	}
+
+	return rune(raw)
+}
+
+// Put the terminal in raw mode
+func rawOn() *term.State {
 	oldState, err := term.MakeRaw(int(os.Stdin.Fd()))
 	if err != nil {
 		panic(err)
@@ -33,6 +45,14 @@ func goRaw() *term.State {
 	return oldState
 }
 
+// Restore the terminal to canonical mode
+func rawOff(oldState *term.State) {
+	err := term.Restore(int(os.Stdin.Fd()), oldState)
+	if err != nil {
+		panic(err)
+	}
+}
+
 // Print a formatted string to stdout, with CRLF line endings for proper terminal formatting
 func outLn(format string, a ...interface{}) {
 	formatted := fmt.Sprintf(format, a...)
@@ -42,8 +62,8 @@ func outLn(format string, a ...interface{}) {
 
 func main() {
 	// Go to proper raw mode, but restore canonical mode at extit
-	oldState := goRaw()
-	defer term.Restore(int(os.Stdin.Fd()), oldState)
+	oldState := rawOn()
+	defer rawOff(oldState)
 
 	reader := bufio.NewReader(os.Stdin)
 
@@ -55,7 +75,7 @@ func main() {
 
 		// Ugliest syntax structure ever?
 		switch {
-		case char == 'q':
+		case char == ctrlKey('q'):
 			outLn("bye!")
 			return
 		case isCtrl(char):