TEngine 6

UnityProject/Packages/YooAsset/Runtime/FileSystem/FileVerifyHelper.cs

@@ -0,0 +1,45 @@
+using System;
+using System.IO;
+
+namespace YooAsset
+{
+    internal class FileVerifyHelper
+    {
+        /// <summary>
+        /// 文件校验
+        /// </summary>
+        public static EFileVerifyResult FileVerify(string filePath, long fileSize, string fileCRC, EFileVerifyLevel verifyLevel)
+        {
+            try
+            {
+                if (File.Exists(filePath) == false)
+                    return EFileVerifyResult.DataFileNotExisted;
+
+                // 先验证文件大小
+                long size = FileUtility.GetFileSize(filePath);
+                if (size < fileSize)
+                    return EFileVerifyResult.FileNotComplete;
+                else if (size > fileSize)
+                    return EFileVerifyResult.FileOverflow;
+
+                // 再验证文件CRC
+                if (verifyLevel == EFileVerifyLevel.High)
+                {
+                    string crc = HashUtility.FileCRC32(filePath);
+                    if (crc == fileCRC)
+                        return EFileVerifyResult.Succeed;
+                    else
+                        return EFileVerifyResult.FileCrcError;
+                }
+                else
+                {
+                    return EFileVerifyResult.Succeed;
+                }
+            }
+            catch (Exception)
+            {
+                return EFileVerifyResult.Exception;
+            }
+        }
+    }
+}