peripheral fingerprinting will now consider meta information in the filename

eg. (PADDLE) indicates that a paddle is to be used

Author: JetSetIlly

hardware/peripherals/fingerprint.go

@@ -17,6 +17,7 @@ package peripherals
 
 import (
 	"fmt"
+	"strings"
 
 	"github.com/jetsetilly/gopher2600/cartridgeloader"
 	"github.com/jetsetilly/gopher2600/hardware/peripherals/atarivox"
@@ -43,6 +44,12 @@ func Fingerprint(port plugging.PortID, loader cartridgeloader.Loader) ports.NewP
 		panic(fmt.Sprintf("cannot fingerprint for port %v", port))
 	}
 
+	// scan filename for any mention of a controller. this takes priority over everything else
+	p := fingerprintFilename(loader.Filename)
+	if p != nil {
+		return p
+	}
+
 	// atarivox and savekey are the most specific peripheral. because atarivox
 	// includes the functionality of savekey we need to check atarivox first
 	if fingerprintAtariVox(port, loader) {
@@ -73,6 +80,23 @@ func Fingerprint(port plugging.PortID, loader cartridgeloader.Loader) ports.NewP
 	return controllers.NewStick
 }
 
+func fingerprintFilename(name string) ports.NewPeripheral {
+	name = strings.ToUpper(name)
+	if strings.Contains(name, "(PADDLE)") {
+		return controllers.NewPaddles
+	}
+	if strings.Contains(name, "(GAMEPAD)") {
+		return controllers.NewGamepad
+	}
+	if strings.Contains(name, "(KEYPAD)") {
+		return controllers.NewKeypad
+	}
+	if strings.Contains(name, "(JOYSTICK)") {
+		return controllers.NewStick
+	}
+	return nil
+}
+
 // fingerprinting beyond the first 64k or so of cartridge data can result in
 // very slow fingerprinting, particular if looking at a large file that is not a
 // cartridge file at all