Very early SevenZip WIP version

ROMVault2/SupportedFiles/ICompress.cs

@@ -0,0 +1,40 @@
+using System.IO;
+
+namespace ROMVault2.SupportedFiles
+{
+    public interface ICompress
+    {
+        int LocalFilesCount();
+
+        string Filename(int i);
+        ulong? LocalHeader(int i);
+        ulong UncompressedSize(int i);
+        byte[] CRC32(int i);
+        ZipReturn FileStatus(int i);
+        byte[] MD5(int i);
+        byte[] SHA1(int i);
+
+
+        ZipOpenType ZipOpen { get; }
+
+        ZipReturn ZipFileOpen(string newFilename, long timestamp, bool readHeaders);
+        void ZipFileClose();
+        ZipReturn ZipFileOpenWriteStream(bool raw, bool trrntzip, string filename, ulong uncompressedSize, ushort compressionMethod, out Stream stream);
+        ZipReturn ZipFileCloseReadStream();
+        void DeepScan();
+
+
+        ZipStatus ZipStatus { get; }
+
+        string ZipFilename { get; }
+        long TimeStamp { get; }
+
+        void ZipFileAddDirectory();
+
+        ZipReturn ZipFileCreate(string newFilename);
+        ZipReturn ZipFileCloseWriteStream(byte[] crc32);
+        ZipReturn ZipFileRollBack();
+        void ZipFileCloseFailed();
+
+    }
+}