Engine directory for ticket #1

Engine/source/core/memVolume.h

@@ -0,0 +1,132 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) 2012 GarageGames, LLC
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+//-----------------------------------------------------------------------------
+#ifndef _MEMVOLUME_H_
+#define _MEMVOLUME_H_
+
+#ifndef _VOLUME_H_
+#include "core/volume.h"
+#endif
+
+#ifndef _TDICTIONARY_H_
+#include "core/util/tDictionary.h"
+#endif 
+
+namespace Torque
+{
+   using namespace FS;
+
+   namespace Mem
+   {
+
+      struct MemFileData;
+      struct MemDirectoryData;
+      class MemDirectory;
+
+      //-----------------------------------------------------------------------------
+      class MemFileSystem: public FileSystem
+      {
+      public:
+         MemFileSystem(String volume);
+         ~MemFileSystem();
+
+         String   getTypeStr() const { return "Mem"; }
+
+         FileNodeRef resolve(const Path& path);
+         FileNodeRef create(const Path& path,FileNode::Mode);
+         bool remove(const Path& path);
+         bool rename(const Path& from,const Path& to);
+         Path mapTo(const Path& path);
+         Path mapFrom(const Path& path);
+
+      private:
+         String mVolume;
+         MemDirectoryData* mRootDir;
+
+         MemDirectory* getParentDir(const Path& path, FileNodeRef& parentRef);
+      };
+
+      //-----------------------------------------------------------------------------
+      /// Mem stdio file access.
+      /// This class makes use the fopen, fread and fwrite for buffered io.
+      class MemFile: public File
+      {
+      public:
+         MemFile(MemFileSystem* fs, MemFileData* fileData);
+         virtual ~MemFile();
+
+         Path getName() const;
+         Status getStatus() const;
+         bool getAttributes(Attributes*);
+
+         U32 getPosition();
+         U32 setPosition(U32,SeekMode);
+
+         bool open(AccessMode);
+         bool close();
+
+         U32 read(void* dst, U32 size);
+         U32 write(const void* src, U32 size);
+
+      private:
+         U32 calculateChecksum();
+
+         MemFileSystem* mFileSystem;
+         MemFileData* mFileData;
+         Status   mStatus;
+         U32 mCurrentPos;
+
+         bool _updateInfo();
+         void _updateStatus();
+      };
+
+
+      //-----------------------------------------------------------------------------
+
+      class MemDirectory: public Directory
+      {
+      public:
+         MemDirectory(MemFileSystem* fs, MemDirectoryData* dir);
+         ~MemDirectory();
+
+         Path getName() const;
+         Status getStatus() const;
+         bool getAttributes(Attributes*);
+
+         bool open();
+         bool close();
+         bool read(Attributes*);
+
+      private:
+         friend class MemFileSystem;
+         MemFileSystem* mFileSystem;
+         MemDirectoryData* mDirectoryData;
+
+         U32 calculateChecksum();         
+         
+         Status   mStatus;
+         U32 mSearchIndex;         
+      };
+
+   } // Namespace
+} // Namespace
+
+#endif