csu3_am335x/EVSE/GPL/open-plc-utils-0.3/pib/pibfile.c

/*====================================================================*
 *
 *   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)
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 *   OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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 *--------------------------------------------------------------------*/

/*====================================================================*
 *
 *   signed pibfile (struct _file_ const * file);
 *
 *   pib.h
 *
 *   confirm that pib->file is a valid PIB file; determine if the
 *   file is a panther/lynx image chain or flat file and call the
 *   correct functions;
 *
 *
 *   Contributor(s):
 *	Charles Maier
 *
 *--------------------------------------------------------------------*/

#ifndef PIBFILE_SOURCE
#define PIBFILE_SOURCE

#include <stdio.h>
#include <stdint.h>
#include <unistd.h>
#include <memory.h>
#include <errno.h>

#include "../tools/memory.h"
#include "../tools/files.h"
#include "../tools/error.h"
#include "../pib/pib.h"

signed pibfile (struct _file_ const * file)

{
	uint32_t version;
	if (read (file->file, &version, sizeof (version)) != sizeof (version))
	{
		error (1, errno, FILE_CANTREAD, file->name);
	}
	if (lseek (file->file, 0, SEEK_SET))
	{
		error (1, errno, FILE_CANTHOME, file->name);
	}
	if (LE32TOH (version) == 0x60000000)
	{
		return (-1);
	}
	if (LE32TOH (version) == 0x00010001)
	{
		return (pibfile2 (file));
	}
	return (pibfile1 (file));
}


#endif