新增options来配置

options.go

@@ -0,0 +1,34 @@
+package gotdx
+
+const (
+	_defaultTCPAddress = "119.147.212.81:7709"
+	_defaultRetryTimes = 3
+)
+
+type Options struct {
+	TCPAddress    string // 服务器地址
+	MaxRetryTimes int    // 重试次数
+}
+
+func defaultOptions() *Options {
+	return &Options{
+		TCPAddress:    _defaultTCPAddress,
+		MaxRetryTimes: _defaultRetryTimes,
+	}
+}
+
+func applyOptions(opts ...Option) *Options {
+	o := defaultOptions()
+	for _, opt := range opts {
+		opt(o)
+	}
+	return o
+}
+
+type Option func(options *Options)
+
+func WithTCPAddress(tcpAddress string) Option {
+	return func(o *Options) {
+		o.TCPAddress = tcpAddress
+	}
+}