[Tinyos-2-commits] CVS: tinyos-2.x/tos/system CrcC.nc,NONE,1.1

[Prabal Dutta]

Update of /cvsroot/tinyos/tinyos-2.x/tos/system
In directory sc8-pr-cvs10.sourceforge.net:/tmp/cvs-serv26805

Added Files:
	CrcC.nc 
Log Message:
Port to T2

--- NEW FILE: CrcC.nc ---
/*                                                                      tab:2
 *
 * "Copyright (c) 2000-2007 The Regents of the University of
 * California.  All rights reserved.
 *
 * Permission to use, copy, modify, and distribute this software and
 * its documentation for any purpose, without fee, and without written
 * agreement is hereby granted, provided that the above copyright
 * notice, the following two paragraphs and the author appear in all
 * copies of this software.
 * 
 * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY
 * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
 * DAMAGES ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS
 * DOCUMENTATION, EVEN IF THE UNIVERSITY OF CALIFORNIA HAS BEEN
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE
 * PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF
 * CALIFORNIA HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT,
 * UPDATES, ENHANCEMENTS, OR MODIFICATIONS."
 *
 */

/**
 * Wrapper around the CRC-16 primitive to allow computing the CRC
 * value of a byte array.
 *
 * @author Jonathan Hui <jwhui at cs.berkeley.edu>
 */
#include <crc.h>

module CrcC {
  provides interface Crc;
}
implementation {

  command uint16_t Crc.crc16(void* buf, uint8_t len) {
    uint8_t* tmp = (uint8_t*)buf;
    uint16_t crc;
    for (crc = 0; len > 0; len--) {
      crc = crcByte(crc, *tmp++);
    }
    return crc;
  }
}