First Public Release.

2014-09-23 12:06:15 -07:00
parent 5ce43ac380
commit 5179fafbc0
102 changed files with 46849 additions and 0 deletions
--- a/ROMVault2/SupportedFiles/Files/UnCompFiles.cs
+++ b/ROMVault2/SupportedFiles/Files/UnCompFiles.cs
@@ -0,0 +1,70 @@
+/******************************************************
+ *     ROMVault2 is written by Gordon J.              *
+ *     Contact gordon@romvault.com                    *
+ *     Copyright 2014                                 *
+ ******************************************************/
+
+using System.IO;
+using System.Security.Cryptography;
+using ROMVault2.SupportedFiles.Zip.ZLib;
+
+namespace ROMVault2.SupportedFiles.Files
+{
+    public static class UnCompFiles
+    {
+        private const int Buffersize = 4096;
+        private static readonly byte[] Buffer;
+
+        static UnCompFiles()
+        {
+            Buffer = new byte[Buffersize];
+        }
+
+        public static int CheckSumRead(string filename, bool testDeep, out byte[] crc, out byte[] bMD5, out byte[] bSHA1)
+        {
+            bMD5 = null;
+            bSHA1 = null;
+            crc = null;
+
+            Stream ds;
+            int errorCode = IO.FileStream.OpenFileRead(filename, out ds);
+            if (errorCode != 0)
+                return errorCode;
+
+            CRC32Hash crc32 = new CRC32Hash();
+
+            MD5 md5 = null;
+            if (testDeep) md5 = MD5.Create();
+            SHA1 sha1 = null;
+            if (testDeep) sha1 = SHA1.Create();
+
+            long sizetogo = ds.Length;
+        
+            while (sizetogo > 0)
+            {
+                int sizenow = sizetogo > Buffersize ? Buffersize : (int)sizetogo;
+
+                ds.Read(Buffer, 0, sizenow);
+                crc32.TransformBlock(Buffer, 0, sizenow, null, 0);
+                if (testDeep) md5.TransformBlock(Buffer, 0, sizenow, null, 0);
+                if (testDeep) sha1.TransformBlock(Buffer, 0, sizenow, null, 0);
+                sizetogo -= sizenow;
+            }
+
+            crc32.TransformFinalBlock(Buffer, 0, 0);
+            if (testDeep) md5.TransformFinalBlock(Buffer, 0, 0);
+            if (testDeep) sha1.TransformFinalBlock(Buffer, 0, 0);
+
+            ds.Close();
+
+            crc = crc32.Hash;
+            if (testDeep) bMD5 = md5.Hash;
+            if (testDeep) bSHA1 = sha1.Hash;
+
+            return 0;
+        }
+
+
+
+    }
+}