imgtools/romtools/rombuild/fcw.pl
author Richard Taylor <richard.i.taylor@nokia.com>
Fri, 30 Apr 2010 16:52:27 +0100
branchwip
changeset 506 efe4a967495a
parent 0 044383f39525
permissions -rw-r--r--
test changes for abiv1 kit property
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#
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# Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).
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# All rights reserved.
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# This component and the accompanying materials are made available
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# under the terms of the License "Eclipse Public License v1.0"
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# which accompanies this distribution, and is available
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# at the URL "http://www.eclipse.org/legal/epl-v10.html".
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#
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# Initial Contributors:
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# Nokia Corporation - initial contribution.
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#
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# Contributors:
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#
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# Description: 
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# fcw.pl - compare two files as 32-bit words
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#
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use strict;
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if (@ARGV!=2)
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	{
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#........1.........2.........3.........4.........5.........6.........7.....
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	print <<USAGE_EOF;
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Usage:
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  fcw file1 file2     -- compare two files
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USAGE_EOF
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	exit 1;
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	}
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my $left=@ARGV[0];
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my $right=@ARGV[1];
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open LEFT, $left or problem("Cannot open $left") and return;
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open RIGHT, $right or problem("Cannot open $right") and return;
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binmode LEFT;
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binmode RIGHT;
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if (compare_streams())
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	{
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	print "Files are identical\n";
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	}
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sub compare_streams
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	{
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	my $same = 1;
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	my $offset = 0;
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	my $leftbuf;
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	my $rightbuf;
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	BINARY_COMPARISON: while (1)
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		{
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		my $leftlen = read LEFT,  $leftbuf,  4096;
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		my $rightlen= read RIGHT, $rightbuf, 4096;
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		if ($rightlen == 0 && $leftlen == 0)
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			{
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			return $same;
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			}
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		if ($leftbuf eq $rightbuf)
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			{
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			$offset += $leftlen;
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			}
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		else
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			{
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			my @leftwords = unpack "V*", $leftbuf;
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			my @rightwords = unpack "V*", $rightbuf;
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			foreach $_ (@leftwords)
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				{
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				if ($_ != @rightwords[0])
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					{
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					printf "%06x: %08x != %08x\n", $offset, $_, @rightwords[0];
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					}
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				shift @rightwords;
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				$offset+=4;
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				}
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			$same=0;
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			}
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		}
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	}
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