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+// file : cult/mm/buffer.hxx
+// author : Boris Kolpackov <boris@kolpackov.net>
+// copyright : Copyright (c) 2005-2010 Boris Kolpackov
+// license : GNU GPL v2 + exceptions; see accompanying LICENSE file
+
+#ifndef CULT_MM_BUFFER_HXX
+#define CULT_MM_BUFFER_HXX
+
+#include <cult/types/fundamental.hxx>
+
+#include <cult/mm/exception.hxx>
+
+namespace Cult
+{
+ namespace MM
+ {
+ //@@ why can't capacity be zero?
+ //
+
+ class Buffer
+ {
+ public:
+ struct Bounds: virtual Exception {};
+ struct ZeroCapacity: virtual Exception {};
+
+ public:
+ virtual
+ ~Buffer ();
+
+ Buffer (Size capacity, Size size = 0)
+ throw (ZeroCapacity, Bounds, BadAlloc);
+
+ Buffer (Void const*, Size size);
+
+ Buffer (Buffer const& other);
+
+ private:
+ Buffer&
+ operator= (Buffer const&);
+
+ public:
+ Size
+ capacity () const throw ();
+
+ // Returns true if the underlying buffer has been moved.
+ //
+ Boolean
+ capacity (Size capacity) throw (ZeroCapacity, Bounds, BadAlloc);
+
+ public:
+ Size
+ size () const throw ();
+
+ Void
+ size (Size size) throw (Bounds);
+
+ public:
+ Index
+ position () const throw ();
+
+ Void
+ position (Index) throw (Bounds);
+
+ public:
+ Char const*
+ data () const;
+
+ Char*
+ data ();
+
+ private:
+ Void* b_;
+ Size c_, s_, p_;
+ };
+ }
+
+ using MM::Buffer;
+}
+
+#endif // CULT_MM_BUFFER_HXX