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+#ifndef ucoolib_hal_i2c_i2c_slave_data_buffer_hh
+#define ucoolib_hal_i2c_i2c_slave_data_buffer_hh
+// ucoolib - Microcontroller object oriented library. {{{
+//
+// Copyright (C) 2013 Nicolas Schodet
+//
+// APBTeam:
+// Web: http://apbteam.org/
+// Email: team AT apbteam DOT org
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// This program 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 General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+//
+// }}}
+#include "ucoolib/intf/i2c.hh"
+
+namespace ucoo {
+
+/// Data sink and source for I2C slave. Store any received data and data to
+/// send in buffers.
+class I2cSlaveDataBuffer : public I2cSlave::DataHandler
+{
+ public:
+ /// Constructor, take buffers.
+ I2cSlaveDataBuffer (char *send_buf, int send_size,
+ char *recv_buf, int recv_size);
+ /// Update slave internal buffer, will be sent to master on request.
+ void update (const char *buf, int count);
+ /// If data has been received, copy it to provided buffer and return its
+ /// size. Else, return 0.
+ int poll (char *buf, int count);
+ /// See I2cSlave::DataHandler::to_send.
+ int to_send (char *buf, int count);
+ /// See I2cSlave::DataHandler::to_recv.
+ void to_recv (const char *buf, int count);
+ private:
+ char *send_buf_;
+ int send_size_, send_count_;
+ char *recv_buf_;
+ int recv_size_, recv_count_;
+};
+
+/// Same as I2cSlaveDataBuffer, but include buffers.
+template<int send_size, int recv_size>
+class I2cSlaveDataBufferSize : public I2cSlaveDataBuffer
+{
+ public:
+ /// Default constructor.
+ I2cSlaveDataBufferSize ()
+ : I2cSlaveDataBuffer (send_array_, sizeof (send_array_),
+ recv_array_, sizeof (recv_array_))
+ { }
+ private:
+ char send_array_[send_size];
+ char recv_array_[recv_size];
+};
+
+} // namespace ucoo
+
+#endif // ucoolib_hal_i2c_i2c_slave_data_buffer_hh