start adding x32 support

internal/xair/option.go

@@ -0,0 +1,18 @@
+package xair
+
+import "strings"
+
+type Option func(*engine)
+
+func WithKind(kind string) Option {
+	if strings.EqualFold(kind, "x32") {
+		return func(c *engine) {
+			c.Kind = kind
+			c.addressMap = x32AddressMap
+		}
+	}
+	return func(c *engine) {
+		c.Kind = "xair"
+		c.addressMap = xairAddressMap
+	}
+}