diff -r 000000000000 -r 31a43d94cc26 include/MemoryMap.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/include/MemoryMap.h	Sun Sep 20 15:14:12 2009 -0700
@@ -0,0 +1,53 @@
+/*
+ *  MemoryMap.h
+ *  Ottoman
+ *
+ *  Created by Jens Alfke on 9/17/09.
+ *  Copyright 2009 Jens Alfke. All rights reserved.
+ *  BSD-Licensed: See the file "LICENSE.txt" for details.
+ */
+
+#include "File.h"
+
+namespace Mooseyard {
+    
+    /** A flexible memory-map on a file, which can handle multiple discontiguous mapped regions.
+        Clients usually access this functionality through File, which delegates to it. */
+    class MemoryMap {
+    public:
+        MemoryMap (File* file)                          :_file(file), _nRegions(0), _regions(NULL) { }
+        ~MemoryMap();
+        
+        void mapRegion (off_t position, size_t length);
+        const void* mappedPosition (off_t position) const;
+        
+    private:
+        UNCOPYABLE(MemoryMap);
+        class Region;
+        const void* _at (off_t) const;
+        
+        File *_file;
+        int _nRegions;
+        Region **_regions;
+    };
+    
+    
+    class MemoryMap::Region {
+    public:
+        Region (File*, off_t position, size_t length);
+        ~Region();
+        off_t position() const                  {return _position;}
+        size_t length() const                   {return _length;}
+        off_t end() const                       {return _position + _length;}
+        bool setLength (size_t);          // Returns false if it failed
+        const void* mappedPosition(off_t);
+    private:
+        UNCOPYABLE(Region);
+        File* const _file;
+        const off_t _position;
+        size_t _length;
+        const uint8_t *_start;
+    };
+    
+    
+}