BS 0.0.1 EasySave初步

2025-06-27 19:51:53 +08:00
parent 5aa5998d22
commit e5bc6a2592
60 changed files with 8785 additions and 29 deletions
--- a/Convention/Runtime/EasySave/Streams/EasySaveStream.cs
+++ b/Convention/Runtime/EasySave/Streams/EasySaveStream.cs
@@ -0,0 +1,92 @@
+using System.IO;
+using System.IO.Compression;
+using System;
+
+namespace Convention.EasySave.Internal
+{
+	public static class EasySaveStream
+	{
+		public static Stream CreateStream(EasySaveSettings settings, EasySaveFileMode fileMode)
+		{
+            bool isWriteStream = (fileMode != EasySaveFileMode.Read);
+            Stream stream = null;
+
+            // Check that the path is in a valid format. This will throw an exception if not.
+            new FileInfo(settings.FullPath);
+
+            try
+            {
+                if (settings.location == EasySave.Location.InternalMS)
+                {
+                    // There's no point in creating an empty MemoryStream if we're only reading from it.
+                    if (!isWriteStream)
+                        return null;
+                    stream = new MemoryStream(settings.bufferSize);
+                }
+                else if (settings.location == EasySave.Location.File)
+                {
+                    if (!isWriteStream && !EasySaveIO.FileExists(settings.FullPath))
+                        return null;
+                    stream = new EasySaveFileStream(settings.FullPath, fileMode, settings.bufferSize, false);
+                }
+
+                return CreateStream(stream, settings, fileMode);
+            }
+            catch(System.Exception e)
+            {
+                if (stream != null)
+                    stream.Dispose();
+                throw;
+            }
+		}
+
+		public static Stream CreateStream(Stream stream, EasySaveSettings settings, EasySaveFileMode fileMode)
+		{
+            try
+            {
+                bool isWriteStream = (fileMode != EasySaveFileMode.Read);
+
+			    #if !DISABLE_ENCRYPTION
+                // Encryption
+			    if(settings.encryptionType != EasySave.EncryptionType.None && stream.GetType() != typeof(UnbufferedCryptoStream))
+			    {
+				    EncryptionAlgorithm alg = null;
+				    if(settings.encryptionType == EasySave.EncryptionType.AES)
+					    alg = new AESEncryptionAlgorithm();
+				    stream = new UnbufferedCryptoStream(stream, !isWriteStream, settings.encryptionPassword, settings.bufferSize, alg);
+			    }
+                #endif
+
+                // Compression
+                if (settings.compressionType != EasySave.CompressionType.None && stream.GetType() != typeof(GZipStream))
+                {
+                    if (settings.compressionType == EasySave.CompressionType.Gzip)
+                        stream = isWriteStream ? new GZipStream(stream, CompressionMode.Compress) : new GZipStream(stream, CompressionMode.Decompress);
+                }
+
+                return stream;
+            }
+            catch (System.Exception e)
+            {
+                if (stream != null)
+                    stream.Dispose();
+                if (e.GetType() == typeof(System.Security.Cryptography.CryptographicException))
+                    throw new System.Security.Cryptography.CryptographicException("Could not decrypt file. Please ensure that you are using the same password used to encrypt the file.");
+                else
+                    throw;
+            }
+        }
+
+        public static void CopyTo(Stream source, Stream destination)
+        {
+        #if UNITY_2019_1_OR_NEWER
+            source.CopyTo(destination);
+        #else
+            byte[] buffer = new byte[2048];
+            int bytesRead;
+            while ((bytesRead = source.Read(buffer, 0, buffer.Length)) > 0)
+                destination.Write(buffer, 0, bytesRead);
+        #endif
+        }
+	}
+}