add more

lazy.go

@@ -0,0 +1,20 @@
+package rei
+
+import (
+	"errors"
+	"strings"
+	"unicode"
+
+	"github.com/FloatTech/zbputils/file"
+)
+
+// 下载并获取本 engine 文件夹下的懒加载数据
+func (e *Engine) GetLazyData(filename string, isDataMustEqual bool) ([]byte, error) {
+	if e.datafolder == "" {
+		return nil, errors.New("datafolder is empty")
+	}
+	if !strings.HasSuffix(e.datafolder, "/") || !strings.HasPrefix(e.datafolder, "data/") || !unicode.IsUpper(rune(e.datafolder[5])) {
+		return nil, errors.New("invalid datafolder")
+	}
+	return file.GetLazyData(e.datafolder+filename, isDataMustEqual)
+}