    /*====================================================================*
     *
     *   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.
     *
     *--------------------------------------------------------------------*/

    /*====================================================================*
     *
     *   pibcomp.c - Qualcomm Atheros Parameter Information Block Compare Utility
     *
     *
     *   Contributor(s):
     *      Nathaniel Houghton <nhoughto@qca.qualcomm.com>
     *	Charles Maier <cmaier@qca.qualcomm.com>
     *
     *--------------------------------------------------------------------*/

    /*====================================================================*
     *   system header files;
     *--------------------------------------------------------------------*/

    #include <unistd.h>
    #include <stdlib.h>
    #include <string.h>
    #include <ctype.h>
    #include <errno.h>
    #include <sys/stat.h>

    /*====================================================================*
     *   custom header files;
     *--------------------------------------------------------------------*/

    #include "../tools/getoptv.h"
    #include "../tools/number.h"
    #include "../tools/memory.h"
    #include "../tools/error.h"
    #include "../tools/flags.h"
    #include "../tools/chars.h"
    #include "../tools/sizes.h"
    #include "../tools/files.h"
    #include "../nvm/nvm.h"
    #include "../pib/pib.h"

    /*====================================================================*
     *   custom source files;
     *--------------------------------------------------------------------*/

    #ifndef MAKEFILE
    #include "../tools/getoptv.c"
    #include "../tools/putoptv.c"
    #include "../tools/version.c"
    #include "../tools/hexview.c"
    #include "../tools/hexoffset.c"
    #include "../tools/error.c"
    #include "../tools/checksum32.c"
    #include "../tools/fdchecksum32.c"
    #endif

    #ifndef MAKEFILE
    #include "../nvm/nvmseek2.c"
    #endif

    /*====================================================================*
     *
     *   void function (char const * filename [], flag_t flags);
     *
     *   read object definitions from stdin and use them to compare two
     *   files; dump only those objects that differ on stdout;
     *
     *
     *--------------------------------------------------------------------*/

    static void function (char const * filename [], flag_t flags)

    {
    	unsigned file;
    	unsigned object = 0;
    	unsigned lineno = 1;
    	signed fd [2];
    	signed length = 0;
    	off_t origin [2];
    	off_t offset [2];
    	off_t extent [2];
    	char memory [_ADDRSIZE+1];
    	char symbol [_NAMESIZE];
    	char string [_LINESIZE];
    	char * sp;
    	signed c;
    	for (file = 0; file < SIZEOF (fd); file++)
    	{
    		uint32_t version;
    		if ((fd [file] = open (filename [file], O_BINARY|O_RDONLY)) == -1)
    		{
    			error (1, errno, "%s", filename [file]);
    		}
    		if (read (fd [file], &version, sizeof (version)) != sizeof (version))
    		{
    			error (1, errno, FILE_CANTREAD, filename [file]);
    		}
    		if ((extent [file] = lseek (fd [file], 0, SEEK_END)) == (off_t)(-1))
    		{
    			error (1, 0, FILE_CANTSIZE, filename [file]);
    		}
    		if ((origin [file] = lseek (fd [file], 0, SEEK_SET)))
    		{
    			error (1, errno, FILE_CANTHOME, filename [file]);
    		}
    		if (LE32TOH (version) == 0x60000000)
    		{
    			error (1, ENOTSUP, "%s is not a PIB file", filename [file]);
    		}
    		if (LE32TOH (version) == 0x00010001)
    		{
    			struct nvm_header2 nvm_header;
    			if (nvmseek2 (fd [file], filename [file], &nvm_header, NVM_IMAGE_PIB))
    			{
    				error (1, ENOTSUP, "%s is not a PIB file", filename [file]);
    			}
    			origin [file] = lseek (fd [file], 0, SEEK_CUR);
    		}
    	}
    	if (origin [0] != origin [1])
    	{
    		error (0, EINVAL, "PIBs have different offsets");
    	}
    	memset (offset, 0, sizeof (offset));
    	while ((c = getc (stdin)) != EOF)
    	{
    		if ((c == '#') || (c == ';'))
    		{
    			do
    			{
    				c = getc (stdin);
    			}
    			while (nobreak (c));
    			lineno++;
    			continue;
    		}
    		if (isspace (c))
    		{
    			if (c == '\n')
    			{
    				lineno++;
    			}
    			continue;
    		}
    		if (c == '+')
    		{
    			do
    			{
    				c = getc (stdin);
    			}
    			while (isblank (c));
    		}
    		length = 0;
    		while (isdigit (c))
    		{
    			length *= 10;
    			length += c - '0';
    			c = getc (stdin);
    		}
    		while (isblank (c))
    		{
    			c = getc (stdin);
    		}
    		sp = symbol;
    		if (isalpha (c) || (c == '_'))
    		{
    			do
    			{
    				*sp++ = (char)(c);
    				c = getc (stdin);
    			}
    			while (isident (c));
    		}
    		while (isblank (c))
    		{
    			c = getc (stdin);
    		}
    		if (c == '[')
    		{
    			*sp++ = (char)(c);
    			c = getc (stdin);
    			while (isblank (c))
    			{
    				c = getc (stdin);
    			}
    			while (isdigit (c))
    			{
    				*sp++ = (char)(c);
    				c = getc (stdin);
    			}
    			while (isblank (c))
    			{
    				c = getc (stdin);
    			}
    			*sp = (char)(0);
    			if (c != ']')
    			{
    				error (1, EINVAL, "Have '%s' but need ']' on line %d", symbol, lineno);
    			}
    			*sp++ = (char)(c);
    			c = getc (stdin);
    		}
    		*sp = (char)(0);
    		while (isblank (c))
    		{
    			c = getc (stdin);
    		}
    		sp = string;
    		while (nobreak (c))
    		{
    			*sp++ = (char)(c);
    			c = getc (stdin);
    		}
    		*sp = (char)(0);
    		if (length > 0)
    		{

    #if defined (WIN32)

    			char * buffer [2];
    			buffer [0] = (char *)(emalloc (length));
    			buffer [1] = (char *)(emalloc (length));

    #else

    			byte buffer [2][length];

    #endif

    			if ((read (fd [0], buffer [0], length) == length) && (read (fd [1], buffer [1], length) == length))
    			{
    				if (memcmp (buffer [0], buffer [1], length))
    				{
    					if (!object++)
    					{
    						for (c = 0; c < _ADDRSIZE + 65; c++)
    						{
    							putc ('-', stdout);
    						}
    						putc ('\n', stdout);
    					}
    					printf ("%s %d %s\n", hexoffset (memory, sizeof (memory), offset [0]), length, symbol);
    					for (c = 0; c < _ADDRSIZE; c++)
    					{
    						putc ('-', stdout);
    					}
    					printf (" %s\n", filename [0]);
    					hexview (buffer [0], offset [0], length, stdout);
    					for (c = 0; c < _ADDRSIZE; c++)
    					{
    						putc ('-', stdout);
    					}
    					printf (" %s\n", filename [1]);
    					hexview (buffer [1], offset [1], length, stdout);
    					for (c = 0; c < _ADDRSIZE + 65; c++)
    					{
    						putc ('-', stdout);
    					}
    					putc ('\n', stdout);
    				}
    			}

    #if defined (WIN32)

    			free (buffer [0]);
    			free (buffer [1]);

    #endif

    		}
    		offset [0] += length;
    		offset [1] += length;
    		lineno++;
    	}
    	if (_allclr (flags, PIB_SILENCE))
    	{
    		offset [0] += origin [0];
    		offset [1] += origin [1];
    		for (file = 0; file < SIZEOF (extent); file++)
    		{
    			if (offset [file] < extent [file])
    			{
    				error (0, 0, "%s exceeds definition by " OFF_T_SPEC " bytes", filename [file], extent [file] - offset [file]);
    			}
    			if (offset [file] > extent [file])
    			{
    				error (0, 0, "definition exceeds %s by " OFF_T_SPEC " bytes", filename [file], offset [file] - extent [file]);
    			}
    		}
    		if (extent [0] > extent [1])
    		{
    			error (0, 0, "%s exceeds %s by " OFF_T_SPEC " bytes", filename [0], filename [1], extent [0] - extent [1]);
    		}
    		if (extent [1] > extent [0])
    		{
    			error (0, 0, "%s exceeds %s by " OFF_T_SPEC " bytes", filename [1], filename [0], extent [1] - extent [0]);
    		}
    	}
    	close (fd [0]);
    	close (fd [1]);
    	return;
    }

    /*====================================================================*
     *
     *   int main (int argc, char const * argv []);
     *
     *
     *
     *--------------------------------------------------------------------*/

    int main (int argc, char const * argv [])

    {
    	static char const * optv [] =
    	{
    		"f:qv",
    		"file1 file2",
    		"Qualcomm Atheros Parameter Information Block Compare Utility",
    		"f f\tobject definition file",
    		"q\tquiet mode",
    		"v\tverbose mode",
    		(char const *)(0)
    	};
    	flag_t flags = (flag_t)(0);
    	signed c;
    	optind = 1;
    	while ((c = getoptv (argc, argv, optv)) != -1)
    	{
    		switch (c)
    		{
    		case 'f':
    			if (!freopen (optarg, "rb", stdin))
    			{
    				error (1, errno, "%s", optarg);
    			}
    			break;
    		case 'q':
    			_setbits (flags, PIB_SILENCE);
    			break;
    		case 'v':
    			_setbits (flags, PIB_VERBOSE);
    			break;
    		default:
    			break;
    		}
    	}
    	argc -= optind;
    	argv += optind;
    	if (argc != 2)
    	{
    		error (1, 0, "Need two files to compare.");
    	}
    	function (argv, flags);
    	return (0);
    }

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