text: /*====================================================================*
   *
   *   Copyright (c) 2013 Qualcomm Atheros, Inc.
   *
   *   All rights reserved.
   *
   *   Redistribution and use in source and binary forms, with or
   *   without modification, are permitted (subject to the limitations
   *   in the disclaimer below) provided that the following conditions
   *   are met:
   *
   *   * Redistributions of source code must retain the above copyright
   *     notice, this list of conditions and the following disclaimer.
   *
   *   * Redistributions in binary form must reproduce the above
   *     copyright notice, this list of conditions and the following
   *     disclaimer in the documentation and/or other materials
   *     provided with the distribution.
   *
   *   * Neither the name of Qualcomm Atheros nor the names of
   *     its contributors may be used to endorse or promote products
   *     derived from this software without specific prior written
   *     permission.
   *
   *   NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE
   *   GRANTED BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE
   *   COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
   *   IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   *   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   *   PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
   *   OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   *   NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   *   LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   *   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   *   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
   *   OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   *   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   *--------------------------------------------------------------------*/
  
  /*====================================================================*
   *
   *   signed NVMSelect (struct plc * plc, signed old (struct plc *), signed new (struct plc *));
   *
   *   plc.h
   *
   *   read the .nvm header to determine file format; rewind the file
   *   then call the right function to execute the applets;
   *
   *
   *   Contributor(s):
   *      Charles Maier
   *
   *--------------------------------------------------------------------*/
  
  #ifndef NVMSELECT_SOURCE
  #define NVMSELECT_SOURCE
  
  #include "../tools/error.h"
  #include "../tools/files.h"
  #include "../plc/plc.h"
  
  signed NVMSelect (struct plc * plc, signed old (struct plc *), signed new (struct plc *))
  
  {
  	uint32_t version;
  	if (lseek (plc->NVM.file, 0, SEEK_SET))
  	{
  		error (1, errno, FILE_CANTHOME, plc->NVM.name);
  	}
  	if (read (plc->NVM.file, &version, sizeof (version)) != sizeof (version))
  	{
  		error (1, errno, FILE_CANTREAD, plc->NVM.name);
  	}
  	if (lseek (plc->NVM.file, 0, SEEK_SET))
  	{
  		error (1, errno, FILE_CANTHOME, plc->NVM.name);
  	}
  	return (LE32TOH (version) == 0x60000000? old (plc): new (plc));
  }
  
  
  #endif
  
  