Refactor image classes and split them to smaller files.

DiscImageChef.DiscImages/QCOW2/Constants.cs

@@ -0,0 +1,64 @@
+// /***************************************************************************
+// The Disc Image Chef
+// ----------------------------------------------------------------------------
+//
+// Filename       : Constants.cs
+// Author(s)      : Natalia Portillo <claunia@claunia.com>
+//
+// Component      : Disk image plugins.
+//
+// --[ Description ] ----------------------------------------------------------
+//
+//     Contains constants for QEMU Copy-On-Write v2 disk images.
+//
+// --[ License ] --------------------------------------------------------------
+//
+//     This library is free software; you can redistribute it and/or modify
+//     it under the terms of the GNU Lesser General Public License as
+//     published by the Free Software Foundation; either version 2.1 of the
+//     License, or (at your option) any later version.
+//
+//     This library is distributed in the hope that it will be useful, but
+//     WITHOUT ANY WARRANTY; without even the implied warranty of
+//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+//     Lesser General Public License for more details.
+//
+//     You should have received a copy of the GNU Lesser General Public
+//     License along with this library; if not, see <http://www.gnu.org/licenses/>.
+//
+// ----------------------------------------------------------------------------
+// Copyright © 2011-2018 Natalia Portillo
+// ****************************************************************************/
+
+namespace DiscImageChef.DiscImages
+{
+    public partial class Qcow2
+    {
+        /// <summary>
+        ///     Magic number: 'Q', 'F', 'I', 0xFB
+        /// </summary>
+        const uint QCOW_MAGIC = 0x514649FB;
+        const uint QCOW_VERSION2        = 2;
+        const uint QCOW_VERSION3        = 3;
+        const uint QCOW_ENCRYPTION_NONE = 0;
+        const uint QCOW_ENCRYPTION_AES  = 1;
+
+        const ulong QCOW_FEATURE_DIRTY   = 0x01;
+        const ulong QCOW_FEATURE_CORRUPT = 0x02;
+        const ulong QCOW_FEATURE_MASK    = 0xFFFFFFFFFFFFFFFC;
+
+        const ulong QCOW_COMPAT_FEATURE_LAZY_REFCOUNTS = 0x01;
+        const ulong QCOW_AUTO_CLEAR_FEATURE_BITMAP     = 0x01;
+
+        const ulong QCOW_FLAGS_MASK = 0x3FFFFFFFFFFFFFFF;
+        const ulong QCOW_COPIED     = 0x8000000000000000;
+        const ulong QCOW_COMPRESSED = 0x4000000000000000;
+
+        const ulong QCOW_HEADER_EXTENSION_BACKING_FILE  = 0xE2792ACA;
+        const ulong QCOW_HEADER_EXTENSION_FEATURE_TABLE = 0x6803F857;
+        const ulong QCOW_HEADER_EXTENSION_BITMAPS       = 0x23852875;
+
+        const int MAX_CACHE_SIZE     = 16777216;
+        const int MAX_CACHED_SECTORS = MAX_CACHE_SIZE / 512;
+    }
+}