bintools/evalid/EvalidCompare.pm.bak
changeset 664 44b0e894b7ab
parent 655 3f65fd25dfd4
child 676 b5e6747818a9
equal deleted inserted replaced
654:7c11c3d8d025 664:44b0e894b7ab
       
     1 #
       
     2 # Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).
       
     3 # All rights reserved.
       
     4 # This component and the accompanying materials are made available
       
     5 # under the terms of the License "Eclipse Public License v1.0"
       
     6 # which accompanies this distribution, and is available
       
     7 # at the URL "http://www.eclipse.org/legal/epl-v10.html".
       
     8 #
       
     9 # Initial Contributors:
       
    10 # Nokia Corporation - initial contribution.
       
    11 #
       
    12 # Contributors:
       
    13 #
       
    14 # Description: 
       
    15 #
       
    16 
       
    17 package EvalidCompare;
       
    18 
       
    19 use strict;
       
    20 our $VERSION = '1.00';
       
    21 use IO::Handle;
       
    22 use IO::File;
       
    23 use Cwd;
       
    24 
       
    25 use File::Temp qw/ tempfile tempdir /;
       
    26 use File::Find;
       
    27 use File::Path;
       
    28 use File::Basename;
       
    29 use File::Copy;
       
    30 
       
    31 #
       
    32 # Constants.
       
    33 #
       
    34 
       
    35 my %typeLookup = (
       
    36       'ARM PE-COFF executable' => 'ignore',
       
    37       'E32 EXE' => 'e32',
       
    38       'E32 DLL' => 'e32',
       
    39       'Uncompressed E32 EXE' => 'e32',
       
    40       'Uncompressed E32 DLL' => 'e32',
       
    41       'Compressed E32 EXE' => 'e32',
       
    42       'Compressed E32 DLL' => 'e32',
       
    43       'Intel DLL' => 'intel_pe',
       
    44       'Intel EXE' => 'intel_pe',
       
    45       'MSDOS EXE' => 'intel_pe',
       
    46       'Intel object' => 'intel',
       
    47       'Intel library' => 'intel',
       
    48       'ELF library' => 'elf',
       
    49       'ARM object' => 'arm',
       
    50       'ARM library' => 'arm',
       
    51       'unknown format' => 'identical',
       
    52       'Java class' => 'identical',
       
    53       'ZIP file' => 'zip',
       
    54       'Permanent File Store' => 'permanent_file_store',
       
    55       'SIS file' => 'identical',
       
    56       'MSVC database' => 'ignore',
       
    57       'MAP file' => 'map',
       
    58       'SGML file' => 'sgml',
       
    59       'Preprocessed text' => 'preprocessed_text',
       
    60       'ELF file' => 'elf',
       
    61       'Unknown COFF object' => 'identical',
       
    62       'Unknown library' => 'identical',
       
    63       'chm file' => 'chm_file',
       
    64 	  'Header file' => 'header',
       
    65 	  'Distribution Policy' => 'distpol'
       
    66      );
       
    67 
       
    68 
       
    69 # %TEMPDIR% and %FILE% are magic words for the expandor
       
    70 # they will be replaced with suitable values when used
       
    71 # they also enabled an order of expandor arguments where the filename is not last
       
    72 my %typeHandler = (
       
    73       e32 => {reader => 'elf2e32 --dump --e32input=', filter => \&Elf2E32Filter},
       
    74       arm => {reader => 'nm --no-sort', filter => \&NmFilter, retry => 1, relative_paths => 1},
       
    75       elf => {reader => 'elfdump -i', filter => \&ElfDumpFilter, rawretry => 1},
       
    76       intel => {reader => '%EPOCROOT%epoc32\gcc_mingw\bin\nm --no-sort', filter => \&NmFilter, rawretry => 1, relative_paths => 1, skipstderr => 1},
       
    77       intel_pe => {reader => 'pe_dump', filter => \&FilterNone, rawretry => 1},
       
    78 	  zip => {reader => '"'.$FindBin::Bin.'/unzip" -l -v', filter => \&UnzipFilter, rawretry => 1},
       
    79       map => {filter => \&MapFilter, skipblanks => 1},
       
    80       sgml => {filter => \&SgmlFilter},
       
    81       preprocessed_text => {filter => \&PreprocessedTextFilter},
       
    82       permanent_file_store => {reader => 'pfsdump -c -v', filter => \&PermanentFileStoreFilter, rawretry => 1, relative_paths => 1},
       
    83       ignore => {filter => \&FilterAll},
       
    84       chm_file => {expandor => 'hh -decompile %TEMPDIR% %FILE%', rawretry => 1},
       
    85 	  header => {filter => \&FilterCVSTags},
       
    86 	  distpol => {filter => \&DistributionPolicyFilter}
       
    87      );
       
    88 
       
    89 
       
    90 #
       
    91 # Globals.
       
    92 #
       
    93 
       
    94 my $log;
       
    95 my $verbose;
       
    96 my $toRoot;
       
    97 my $dumpDir;
       
    98 
       
    99 undef $dumpDir;
       
   100 
       
   101 
       
   102 #
       
   103 # Public.
       
   104 #
       
   105 
       
   106 sub CompareFiles {
       
   107   my $file1 = shift;
       
   108   my $file2 = shift;
       
   109   $verbose = defined($_[0]) ? shift : 0;
       
   110   $log = defined($_[0]) ? shift : *STDOUT;
       
   111   # Try binary compare first (to keep semantics the same as evalid)...
       
   112   if (DoCompareFiles($file1, $file2, 'unknown format')) {
       
   113     return 1,'identical';
       
   114   }
       
   115   my $type = IdentifyFileType($file1);
       
   116   if ($typeLookup{$type} eq 'identical') {
       
   117     return 0,$type; # We already know a binary compare is going to return false.
       
   118   }
       
   119   return DoCompareFiles($file1, $file2, $type),$type;
       
   120 }
       
   121 
       
   122 sub GenerateSignature {
       
   123   my $file = shift;
       
   124   $dumpDir = shift;
       
   125   $verbose = defined($_[0]) ? shift : 0;
       
   126   $log = defined($_[0]) ? shift : *STDOUT;
       
   127   my $md5;
       
   128 
       
   129   if (eval "require Digest::MD5") { # Prefer Digest::MD5, if available.
       
   130     $md5 = Digest::MD5->new();
       
   131   } elsif (eval "require MD5") { # Try old version of MD5, if available.
       
   132     $md5 = new MD5;
       
   133   } elsif (eval "require Digest::Perl::MD5") { # Try Perl (Slow) version of MD5, if available.
       
   134     $md5 = Digest::Perl::MD5->new();
       
   135   } else {
       
   136     die "Error: Cannot load any MD5 Modules";
       
   137   }
       
   138 
       
   139   my $type = IdentifyFileType($file);
       
   140   WriteFilteredData($file, $type, $md5);
       
   141   return $md5->hexdigest(), $type;
       
   142 }
       
   143 
       
   144 
       
   145 #
       
   146 # Private.
       
   147 #
       
   148 
       
   149 sub IdentifyFileType {
       
   150   my $file = shift;
       
   151   open (FILE, $file) or die "Error: Couldn't open \"$file\" for reading: $!\n";
       
   152   binmode (FILE);
       
   153   my $typeBuf;
       
   154   read (FILE, $typeBuf, 512);
       
   155   close (FILE);
       
   156   my ($uid1, $uid2, $uid3, $checksum) = unpack "V4", $typeBuf;
       
   157 
       
   158   # NB. Need to use the s modifier so that '.' will match \x0A
       
   159 
       
   160   if ($typeBuf =~ /^.\x00\x00\x10.{12}EPOC.{8}(....).{12}(.)..(.)/s) {
       
   161     # E32 Image file with a 0x100000?? UID1
       
   162     # $2 is the flag field indicating an EXE or a DLL
       
   163     # $3 is the flag byte indicating compressable executables
       
   164     # $1 is the format field indicating compression type
       
   165     # See e32tools\inc\e32image.h
       
   166     #
       
   167     my $typename = "E32 EXE";
       
   168     if ((ord $2) & 0x1) {
       
   169       $typename = "E32 DLL";
       
   170     }
       
   171     if ((ord $3) >= 0x1) {
       
   172     if ((ord $1) != 0) {
       
   173         $typename = "Compressed $typename";
       
   174     }
       
   175     else {
       
   176         $typename = "Uncompressed $typename";
       
   177     }
       
   178     }
       
   179     return $typename;
       
   180   }
       
   181 
       
   182   if ($typeBuf =~ /^\x4D\x5A.{38}\x00{20}(....)/s) {
       
   183     # A standard 64-byte MS-DOS header with e_magic == IMAGE_DOS_SIGNATURE
       
   184     # $1 is e_lfanew, which we expect to point to a COFF header
       
   185 
       
   186     my $offset = unpack "V",$1;
       
   187     if ($offset + 24 <= length $typeBuf) {
       
   188       $typeBuf = substr $typeBuf, $offset;
       
   189     }
       
   190     else {
       
   191       open FILE, $file or die "Error: Couldn't open \"$file\" for reading: $!\n";
       
   192       binmode FILE;
       
   193       seek FILE, $offset, 0;
       
   194       read FILE, $typeBuf, 512;
       
   195       close FILE;
       
   196     }
       
   197 
       
   198     if ($typeBuf =~ /^PE\0\0\x4c\x01.{16}(..)/s) {
       
   199       # A PE signature "PE\0\0" followed by a COFF header with
       
   200       # machine type IMAGE_FILE_MACHINE_I386
       
   201       # $1 is the characteristics field
       
   202       #
       
   203       if ((unpack "v",$1) & 0x2000) {
       
   204     return "Intel DLL";
       
   205       }
       
   206       else {
       
   207     return "Intel EXE";
       
   208       }
       
   209     }
       
   210   elsif($typeBuf =~ /^PE\0\0\0\x0a/) {
       
   211   # A PE signature "PE\0\0" followed by ARM COFF file magic value 0xA00
       
   212     return "ARM PE-COFF executable";
       
   213   }
       
   214     else {
       
   215       return "MSDOS EXE";
       
   216     }
       
   217   }
       
   218 
       
   219   if ($typeBuf =~ /^(\x4c\x01|\x00\x0A).(\x00|\x01).{4}...\x00/s) {
       
   220     # COFF header with less than 512 sections and a symbol table
       
   221     # at an offset no greater than 0x00ffffff
       
   222 
       
   223     if ($1 eq "\x4c\x01") {
       
   224       return "Intel object";
       
   225     }
       
   226     elsif ($1 eq "\x00\x0A") {
       
   227       return "ARM object";
       
   228     }
       
   229     else {
       
   230       return "Unknown COFF object";
       
   231     }
       
   232   }
       
   233 
       
   234   if ($typeBuf =~ /^!<arch>\x0A(.{48}([0-9 ]{9})\x60\x0A(......))/s) {
       
   235     # library - could be MARM or WINS
       
   236 
       
   237     $typeBuf = $1;
       
   238     my $member_start = 8;
       
   239 
       
   240     open (FILE, $file) or die "Error: Couldn't open \"$file\" for reading: $!\n";
       
   241     binmode (FILE);
       
   242     
       
   243     while ($typeBuf =~ /^.{48}([0-9 ]{9})\x60\x0A(......)/s) {
       
   244       # $1 is the size of the archive member, $2 is first 6 bytes of the file
       
   245       # There may be several different sorts of file in the archive, and we
       
   246       # need to scan through until we find a type we recognize:
       
   247       # $2 == 0x0A00 would be ARM COFF, 0x014C would be Intel COFF
       
   248       if ($2 =~ /^\x00\x0A/) {
       
   249   close FILE;
       
   250   return "ARM library";
       
   251       }
       
   252       if ($2 =~ /^\x4C\x01/) {
       
   253   close FILE;
       
   254   return "Intel library";
       
   255       }
       
   256 	  my $elfBuf =  $2;
       
   257       if ($2 =~ /^\x7F\x45\x4C\x46/) {
       
   258   close FILE;
       
   259 		my $dataEncodingLib = substr($elfBuf, 5, 6);
       
   260 		if ( $dataEncodingLib =~ /^\x02/) {	
       
   261 			# e_ident[EI_DATA] == 2 (Data Encoding ELFDATA2MSB - big endian)
       
   262 			# this is not supported by Elfdump hence it is treated as 'unknown format'
       
   263 		return 'unknown library';
       
   264 		}
       
   265 		else {
       
   266 		return "ELF library";
       
   267 		}
       
   268 	 }
       
   269 
       
   270       $member_start += 60 + $1;
       
   271       if ($member_start & 0x1) {
       
   272         $member_start += 1;  # align to multiple of 2 bytes
       
   273       }
       
   274       seek FILE, $member_start, 0;
       
   275       read FILE, $typeBuf, 512;
       
   276     }
       
   277     close FILE;
       
   278     return "Unknown library";
       
   279   }
       
   280 
       
   281   if ($typeBuf =~ /^\xCA\xFE\xBA\xBE/) {
       
   282     # Java class file - should have match as a straight binary comparison
       
   283     return "Java class";
       
   284   }
       
   285 
       
   286   if ($typeBuf =~ /^PK\x03\x04/) {
       
   287     # ZIP file
       
   288     return "ZIP file";
       
   289   }
       
   290 
       
   291   if ($uid1 && $uid1==0x10000050) {
       
   292     # Permanent File Store
       
   293     return "Permanent File Store";
       
   294   }
       
   295 
       
   296   if ($uid1 && $uid2 && $uid3 && $checksum && $uid3==0x10000419) {
       
   297     if (($uid1==0x100002c3 && $uid2==0x1000006d && $checksum==0x128ca96f)  # narrow
       
   298   ||  ($uid1==0x10003b0b && $uid2==0x1000006d && $checksum==0x75e21a1d)  # unicode
       
   299   ||  ($uid1==0x10009205 && $uid2==0x10003a12 && $checksum==0x986a0c25)) # new format
       
   300       {
       
   301       # SIS file
       
   302       return "SIS file";
       
   303       }
       
   304   }
       
   305 
       
   306   if ($typeBuf =~ /^Microsoft [^\x0A]+ [Dd]atabase/s) {
       
   307     return "MSVC database";
       
   308   }
       
   309 
       
   310   if ($typeBuf =~ /^\S.+ needed due to / || $typeBuf =~ /^Archive member included.*because of file/) {
       
   311     # GCC MAP file
       
   312     return "MAP file";
       
   313   }
       
   314 
       
   315   if ($typeBuf =~ /Preferred load address is/) {
       
   316     # Developer Studio MAP file
       
   317     return "MAP file";
       
   318   }
       
   319 
       
   320   if ($typeBuf =~ /^Address\s+Size\s+Name\s+Subname\s+Module/) {
       
   321     # CodeWarrior MAP file
       
   322     return "MAP file";
       
   323   }
       
   324 
       
   325   if ($typeBuf =~ /^ARM Linker,/) {
       
   326     # RVCT MAP file
       
   327     return "MAP file";
       
   328   }
       
   329 
       
   330   if ($typeBuf =~ /<!DOCTYPE/i) {
       
   331     # XML or HTML file - need to ignore javadoc generation dates
       
   332     return "SGML file";
       
   333   }
       
   334 
       
   335   if ($typeBuf =~ /^# 1 ".*"(\x0D|\x0A)/s) {
       
   336     # Output of CPP
       
   337     return "Preprocessed text";
       
   338   }
       
   339 
       
   340   if ($typeBuf =~ /^\x7F\x45\x4C\x46/) {
       
   341 	my $dataEncoding = substr($typeBuf, 5, 6);
       
   342 	if ( $dataEncoding =~ /^\x02/) {	
       
   343 	  # e_ident[EI_DATA] == 2 (Data Encoding ELFDATA2MSB - big endian)
       
   344 	  # this is not supported by Elfdump hence it is treated as 'unknown format'
       
   345 	   return 'unknown format';
       
   346 	}
       
   347 	else {
       
   348 		return "ELF file";;
       
   349 	}
       
   350    }
       
   351   
       
   352   if ($typeBuf =~/^ITSF/) {
       
   353     # chm file
       
   354     return "chm file";
       
   355   }
       
   356 
       
   357   if ($file =~ m/\.(iby|h|hby|hrh|oby|rsg|cpp)$/i) {
       
   358     return "Header file";
       
   359   }
       
   360   
       
   361   if ($file =~ /distribution\.policy$/i) {
       
   362 	return "Distribution Policy"
       
   363   }
       
   364 
       
   365   return 'unknown format';
       
   366 }
       
   367 
       
   368 sub WriteFilteredData {
       
   369   my $file = shift;
       
   370   my $type = shift;
       
   371   my $md5 = shift;
       
   372   my $dumpDirExpandedFile = shift;
       
   373 
       
   374   my (@dumpDirBuffer);
       
   375 
       
   376   unless (exists $typeLookup{$type}) {
       
   377     die "Invalid file type \"$type\"";
       
   378   }
       
   379   $type = $typeLookup{$type};
       
   380   
       
   381   # Check to see if this file type requires expanding first
       
   382   if (exists $typeHandler{$type}->{expandor})
       
   383   {
       
   384     my $expandor = $typeHandler{$type}->{expandor};
       
   385     # Create two temporary directories
       
   386     my $tempdir = tempdir ( "EvalidExpand_XXXXXX", DIR => File::Spec->tmpdir, CLEANUP => 1);
       
   387 
       
   388     # Build the Expandor commandline
       
   389     $expandor =~ s/%TEMPDIR%/$tempdir/g;
       
   390     $expandor =~ s/%FILE%/$file/g;
       
   391     
       
   392     # Expand files
       
   393     my $output = `$expandor 2>&1`;
       
   394     print($log "Expanding using $expandor output was:-\n$output") if ($verbose);
       
   395     if ($? > 0)
       
   396     {
       
   397       print ($log "$expandor exited with $?") if ($verbose);
       
   398       # set type to be identical for retry if raw
       
   399       if ($typeHandler{$type}->{rawretry} == 1)
       
   400       {
       
   401         $type = 'identical';
       
   402       } else {
       
   403         print "ERROR: failed to start $expandor (" .($?). ") - reporting failure\n";
       
   404       }
       
   405     } else {    
       
   406       # Process all files in $tempdir
       
   407       my @FileList;
       
   408       find(sub { push @FileList, $File::Find::name if (! -d);}, $tempdir);
       
   409       foreach my $expandfile (@FileList)
       
   410       {
       
   411 	  my $dumpDirExpandedFilename = "";
       
   412       	
       
   413       if ($dumpDir)
       
   414       	{
       
   415 	  	$dumpDirExpandedFilename = $expandfile;
       
   416 		$dumpDirExpandedFilename =~ s/^.*EvalidExpand_\w+//;
       
   417 	  	$dumpDirExpandedFilename = $file.$dumpDirExpandedFilename;
       
   418       	}
       
   419       	
       
   420       my $type = IdentifyFileType($expandfile);
       
   421       
       
   422       &WriteFilteredData($expandfile, $type, $md5, $dumpDirExpandedFilename);
       
   423       }
       
   424     }
       
   425   }  elsif ($type ne 'identical') {
       
   426     unless (exists $typeHandler{$type}) {
       
   427       die "Invalid comparison type \"$type\"";
       
   428     }
       
   429     my $reader = $typeHandler{$type}->{reader};
       
   430     my $filter = $typeHandler{$type}->{filter};
       
   431     my $retry = $typeHandler{$type}->{retry} || 0;
       
   432     my $rawretry = $typeHandler{$type}->{rawretry} || 0;
       
   433 	my $skipblanks = $typeHandler{$type}->{skipblanks} || 0;
       
   434     my $relativePaths = $typeHandler{$type}->{relative_paths} || 0;
       
   435     my $dosPaths = $typeHandler{$type}->{dos_paths} || 0;
       
   436 
       
   437 	my $skipstderr = $typeHandler{$type}->{skipstderr} || 0;
       
   438 	my $redirectstd = "2>&1";
       
   439 	
       
   440 	if ($skipstderr) {
       
   441 		$redirectstd = "2>NUL";
       
   442 	}
       
   443 	  
       
   444     if ($relativePaths) {
       
   445       $file = RelativePath($file);
       
   446     }
       
   447     if ($dosPaths) {
       
   448       $file =~ s/\//\\/g;       # convert to DOS-style backslash separators
       
   449     }
       
   450     
       
   451     my $raw;
       
   452     if ($reader) {
       
   453       $raw = IO::File->new("$reader \"$file\" $redirectstd |") or die "Error: Couldn't run \"$reader $file\": $!\n";
       
   454     }
       
   455     else {
       
   456       $raw = IO::File->new("$file") or die "Error: Couldn't open \"$file\": $!\n";
       
   457     }
       
   458     while (my $line = <$raw>) {
       
   459       &$filter(\$line);
       
   460 	  next if $skipblanks and $line =~ /^\s*$/;
       
   461       $md5->add($line);
       
   462       push @dumpDirBuffer, $line if ($dumpDir);
       
   463     }
       
   464     Drain($raw);
       
   465     $raw->close();
       
   466 
       
   467     # Retry once if reader failed and reader has retry specified
       
   468     if ((($?>>8) != 0) && ($retry == 1))
       
   469     {
       
   470       print "Warning: $reader failed (" .($?>>8). ") on $file - retrying\n";
       
   471       # Reset MD5
       
   472       $md5->reset;
       
   473       undef @dumpDirBuffer if ($dumpDir);
       
   474       $raw = IO::File->new("$reader \"$file\" $redirectstd |") or die "Error: Couldn't run \"$reader $file\": $!\n";
       
   475       while (my $line = <$raw>)
       
   476       {
       
   477         &$filter(\$line);
       
   478 		next if $skipblanks and $line =~ /^\s*$/;
       
   479         $md5->add($line);
       
   480         push @dumpDirBuffer, $line if ($dumpDir);
       
   481       }
       
   482       Drain($raw);
       
   483       $raw->close();
       
   484       if (($?>>8) != 0)
       
   485       {
       
   486         print "Error: $reader failed again (" .($?>>8) .") on $file - reporting failure\n";
       
   487       }
       
   488     }
       
   489 
       
   490     # Retry as raw if specified
       
   491     if (($?>>8) != 0) {
       
   492       if ($rawretry)
       
   493       {
       
   494           if ($reader =~ /^pfsdump/) { 
       
   495               print "Warning: $reader failed (". ($?>>8) .") on file $file - retrying as raw binary\n";
       
   496           }
       
   497           else {
       
   498               print "Info: something wrong to execute $reader (". ($?>>8) .") on file $file - retrying as raw binary\n";
       
   499           }
       
   500           # Set type to be identical so it will try it as a raw binary stream
       
   501           $type = 'identical';
       
   502       } else {
       
   503         print "Error: $reader failed (". ($?>>8) .") on file $file - not retrying as raw binary\n";
       
   504       }
       
   505     }
       
   506   }
       
   507   if ($type eq 'identical') {
       
   508     # Reset md5 as it might have been used in reader section
       
   509     $md5->reset;
       
   510 	undef @dumpDirBuffer if ($dumpDir);
       
   511     # Treat 'identical' as a special case - no filtering, just write raw binary stream.
       
   512     my $raw = IO::File->new($file) or die "Error: Couldn't open \"$file\" for reading: $!\n";
       
   513     binmode($raw);
       
   514     my $buf;
       
   515     while ($raw->read($buf, 4096)) {
       
   516       $md5->add($buf);
       
   517     }
       
   518     $raw->close();
       
   519   }
       
   520 
       
   521   my $dumpDirFilename = $file;
       
   522   $dumpDirFilename = $dumpDirExpandedFile if ($dumpDirExpandedFile);
       
   523   dumpDescriptiveOutput ($file, $dumpDirFilename, @dumpDirBuffer) if ($dumpDir);
       
   524   
       
   525   # Make sure the $? is reset for the next file otherwise it will report errors
       
   526   $? = 0;
       
   527 }
       
   528 
       
   529 sub DoCompareFiles {
       
   530   my $file1 = shift;
       
   531   my $file2 = shift;
       
   532   my $type = shift;
       
   533   my $same = 0;
       
   534   unless (exists $typeLookup{$type}) {
       
   535     die "Invalid file type \"$type\"";
       
   536   }
       
   537   
       
   538   $type = $typeLookup{$type};
       
   539   
       
   540   # Check to see if this file type requires expanding first
       
   541   if (exists $typeHandler{$type}->{expandor})
       
   542   {
       
   543     $same = &ExpandAndCompareFiles($file1, $file2, $typeHandler{$type}->{expandor});
       
   544     # Check for Expanding error
       
   545     if ($same == -1)
       
   546     {
       
   547       if ($typeHandler{$type}->{rawretry} == 1)
       
   548       {
       
   549         # Set type to be identical if rawrety is set
       
   550         $type = 'identical';
       
   551         print($log "Warning: Expandor $typeHandler{$type}->{expandor} failed for $file1 or $file2 : retrying as raw\n") if ($verbose);
       
   552       } else {
       
   553         die "Error: Expandor $typeHandler{$type}->{expandor} failed for $file1 or $file2\n";
       
   554       }
       
   555     } else {
       
   556       return $same;
       
   557     }
       
   558   }
       
   559     
       
   560   if ($type ne 'identical')
       
   561   {
       
   562     unless (exists $typeHandler{$type}) {
       
   563       die "Invalid comparison type \"$type\"";
       
   564     }
       
   565     
       
   566     my $reader = $typeHandler{$type}->{reader};
       
   567     my $filter = $typeHandler{$type}->{filter};
       
   568     my $retry = $typeHandler{$type}->{retry} || 0;
       
   569 	my $skipblanks= $typeHandler{$type}->{skipblanks} || 0;
       
   570     my $rawretry = $typeHandler{$type}->{rawretry} || 0;
       
   571     my $relativePaths = $typeHandler{$type}->{relative_paths} || 0;
       
   572 	my $skipstderr = $typeHandler{$type}->{skipstderr} || 0;
       
   573 	my $redirectstd = "2>&1";
       
   574 	
       
   575 	if ($skipstderr) {
       
   576 		$redirectstd = "2>NUL";
       
   577 	}
       
   578     
       
   579     if ($relativePaths) {
       
   580       $file1 = RelativePath($file1);
       
   581       $file2 = RelativePath($file2);
       
   582     }
       
   583     my $fileHandle1;
       
   584     my $fileHandle2;
       
   585     if ($reader) {
       
   586       $fileHandle1 = IO::File->new("$reader \"$file1\" $redirectstd |") or die "Error: Couldn't run \"$reader $file1\": $!\n";
       
   587       $fileHandle2 = IO::File->new("$reader \"$file2\" $redirectstd |") or die "Error: Couldn't run \"$reader $file2\": $!\n";
       
   588     }
       
   589     else {
       
   590       $fileHandle1 = IO::File->new("$file1") or die "Error: Couldn't open \"$file1\": $!\n";
       
   591       $fileHandle2 = IO::File->new("$file2") or die "Error: Couldn't open \"$file2\": $!\n";
       
   592     }
       
   593 	$same = CompareTexts($fileHandle1, $fileHandle2, $filter, $file1, $skipblanks);
       
   594     Drain($fileHandle1, $fileHandle2);
       
   595 
       
   596     $fileHandle1->close();
       
   597     my $status1 = $?>>8;
       
   598     $fileHandle2->close();
       
   599     my $status2 = $?>>8;
       
   600     if (($retry) && ($status1 != 0 or $status2 != 0))
       
   601     {
       
   602       print ($log "Warning: $reader failed ($status1, $status2) - retrying\n");
       
   603 
       
   604       # Repeat previous code by hand, rather than calling DoCompareFiles
       
   605       # again: if it's a systematic failure that would be a never ending loop...
       
   606 
       
   607       $fileHandle1 = IO::File->new("$reader \"$file1\" $redirectstd |") or die "Error: Couldn't run \"$reader $file1\": $!\n";
       
   608       $fileHandle2 = IO::File->new("$reader \"$file2\" $redirectstd |") or die "Error: Couldn't run \"$reader $file2\": $!\n";
       
   609 	  $same = CompareTexts($fileHandle1, $fileHandle2, $filter, $file1, $skipblanks);
       
   610       Drain($fileHandle1, $fileHandle2);
       
   611       $fileHandle1->close();
       
   612       $status1 = $?>>8;
       
   613       $fileHandle2->close();
       
   614       $status2 = $?>>8;
       
   615       if ($status1 != 0 or $status2 != 0)
       
   616       {
       
   617         print ($log "Warning: $reader failed again ($status1, $status2) - reporting failure\n");
       
   618         $same = 0;
       
   619       }
       
   620     }
       
   621 
       
   622     # Retry as raw if specified
       
   623     if (($rawretry)&& ($status1 != 0 or $status2 != 0))
       
   624     {
       
   625       if ($rawretry)
       
   626       {
       
   627         print ($log "Warning: $reader failed (" .($?>>8). ") on a file retrying as raw binary\n");
       
   628         # Set type to be identical so it will try it as a raw binary stream
       
   629         $type = 'identical';
       
   630       } else {
       
   631         print ($log "Error: $reader failed (" .($?>>8). ") on a file not retrying as raw binary\n");
       
   632       }
       
   633     }
       
   634 
       
   635   }
       
   636 
       
   637   if ($type eq 'identical') {
       
   638     # Treat 'identical' as a special case - no filtering, just do raw binary stream comparison.
       
   639     my $fileHandle1 = IO::File->new($file1) or die "Error: Couldn't open \"$file1\" for reading: $!\n";
       
   640     my $fileHandle2 = IO::File->new($file2) or die "Error: Couldn't open \"$file2\" for reading: $!\n";
       
   641     binmode($fileHandle1);
       
   642     binmode($fileHandle2);
       
   643     $same = CompareStreams($fileHandle1, $fileHandle2, $file1);
       
   644   }
       
   645 
       
   646   # Make sure the $? is reset for the next file otherwise it will report errors
       
   647   $? = 0;
       
   648 
       
   649   return $same;
       
   650 }
       
   651 
       
   652 sub CompareStreams {
       
   653   my $fileHandle1 = shift;
       
   654   my $fileHandle2 = shift;
       
   655   my $filename = shift;
       
   656   my $same = 1;
       
   657   my $offset = -4096;
       
   658   my $buf1;
       
   659   my $buf2;
       
   660   while ($same) {
       
   661     my $len1 = $fileHandle1->read($buf1, 4096);
       
   662     my $len2 = $fileHandle2->read($buf2, 4096);
       
   663     if ($len1 == 0 and $len2 == 0) {
       
   664       return 1;
       
   665     }
       
   666     $same = $buf1 eq $buf2;
       
   667     $offset += 4096;
       
   668   }
       
   669   if ($verbose) {
       
   670     my @bytes1 = unpack "C*", $buf1;
       
   671     my @bytes2 = unpack "C*", $buf2;
       
   672     foreach my $thisByte (@bytes1) {
       
   673       if ($thisByte != $bytes2[0]) {
       
   674 	printf $log "Binary comparison: %s failed at byte %d: %02x != %02x\n", $filename, $offset, $thisByte, $bytes2[0];
       
   675 	last;
       
   676       }
       
   677       shift @bytes2;
       
   678       $offset+=1;
       
   679     }
       
   680   }
       
   681   return 0;
       
   682 }
       
   683 
       
   684 sub NextSignificantLine {
       
   685 	my $filehandle = shift;
       
   686 	my $linenumber = shift;
       
   687 	my $cleanersub = shift;
       
   688 	my $skipblanks = shift;
       
   689 
       
   690 	while (!eof($filehandle)) {
       
   691 		my $line = <$filehandle>;
       
   692 		$$linenumber++;
       
   693 		$cleanersub->(\$line);
       
   694 		return $line if !$skipblanks or $line !~ /^\s*$/;
       
   695 	}
       
   696 	return undef; # on eof
       
   697 }
       
   698 
       
   699 sub CompareTexts {
       
   700 	my $filehandle1 = shift;
       
   701 	my $filehandle2 = shift;
       
   702 	my $cleaner = shift;
       
   703 	my $filename = shift;
       
   704 	my $skipblanks = shift;
       
   705 	my $lineNum1 = 0;
       
   706 	my $lineNum2 = 0;
       
   707 
       
   708 	while (1) {
       
   709 		my $line1 = NextSignificantLine($filehandle1, \$lineNum1, $cleaner, $skipblanks);
       
   710 		my $line2 = NextSignificantLine($filehandle2, \$lineNum2, $cleaner, $skipblanks);
       
   711 
       
   712 		return 0 if defined($line1) != defined($line2); # eof vs. significant content
       
   713 		return 1 if !defined($line1) and !defined($line2); # eof on both files
       
   714 
       
   715 		if ($line1 ne $line2) {
       
   716 			printf($log "Text comparison: %s failed at lines %d/%d\n< %s> %s\n",
       
   717 			$filename, $lineNum1, $lineNum2, $line1, $line2) if $verbose;
       
   718 			return 0;
       
   719 		}
       
   720 	}
       
   721 }
       
   722 
       
   723 sub Drain {
       
   724   foreach my $handle (@_) {
       
   725     while (my $line = <$handle>) {
       
   726     }
       
   727   }
       
   728 }
       
   729 
       
   730 sub RelativePath {
       
   731   my $name = shift;
       
   732   if (($name =~ /^\\[^\\]/) || ($name =~ /^\//)) {  # abs path (unix or windows), not UNC
       
   733     unless ($toRoot) {
       
   734       $toRoot = getcwd();
       
   735       $toRoot =~ s/\//\\/g;
       
   736       $toRoot =~ s/^[a-zA-Z]:\\(.*)$/$1/;
       
   737       $toRoot =~ s/[^\\]+/../g;
       
   738       if ($toRoot =~ /^$/) {
       
   739   $toRoot = '.';    # because we are starting in the root
       
   740       }
       
   741     }
       
   742     return $toRoot.$name;
       
   743   }
       
   744   return $name;
       
   745 }
       
   746 
       
   747 # Function to expand compressed formats and recompare expanded files
       
   748 # This is the file against file implementation
       
   749 # It returns one identical / non indentical result based on all files in the
       
   750 # expanded content. i.e one non identical expanded file will cause the non
       
   751 # expanded file to be reported as non identical.
       
   752 sub ExpandAndCompareFiles
       
   753 {
       
   754   my $file1 = shift;
       
   755   my $file2 = shift;
       
   756   my $expandor = shift;
       
   757   
       
   758   # Create two temporary directories
       
   759   my $tempdir1 = tempdir ( "EvalidExpand_XXXXXX", DIR => File::Spec->tmpdir, CLEANUP => 1);
       
   760   my $tempdir2 = tempdir ( "EvalidExpand_XXXXXX", DIR => File::Spec->tmpdir, CLEANUP => 1);
       
   761   
       
   762   # Build the Expandor commandline
       
   763   my $cmd1 = $expandor;
       
   764   $cmd1 =~ s/%TEMPDIR%/$tempdir1/g;
       
   765   $cmd1 =~ s/%FILE%/$file1/g;
       
   766   
       
   767   my $cmd2 = $expandor;
       
   768   $cmd2 =~ s/%TEMPDIR%/$tempdir2/g;
       
   769   $cmd2 =~ s/%FILE%/$file2/g;
       
   770   
       
   771   # Expand files
       
   772   my $output = `$cmd1 2>&1`;
       
   773   print($log "Expanding using $cmd1 output was:-\n$output") if ($verbose);
       
   774   if ($? > 0)
       
   775   {
       
   776     print ($log "$cmd1 exited with $?") if ($verbose);
       
   777     return -1;
       
   778   }
       
   779   
       
   780   $output = `$cmd2 2>&1`;
       
   781   print($log "Expanding using $cmd2 output was:-\n$output") if ($verbose);
       
   782   if ($? > 0)
       
   783   {
       
   784     print ($log "$cmd2 exited with $?") if ($verbose);
       
   785     return -1;
       
   786   }
       
   787   
       
   788   # Produce full filelist of expanded files without directory names
       
   789   my %iFileList1;
       
   790   $tempdir1 =~ s#\\#/#g; # Make sure the dir seperators are / for consistent and easier matching.
       
   791   find sub {
       
   792             if (!-d)
       
   793             {
       
   794               my ($fixedpath) = $File::Find::name;
       
   795               $fixedpath =~ s#\\#/#g;
       
   796               my ($relpath) = $File::Find::name =~ /$tempdir1(.*)/i;
       
   797               $iFileList1{$relpath} = "left";
       
   798             }
       
   799           }, $tempdir1;
       
   800 
       
   801   my %iFileList2;
       
   802   $tempdir2 =~ s#\\#/#g; # Make sure the dir seperators are / for consistent and easier matching.
       
   803   find sub {
       
   804             if (!-d)
       
   805             {
       
   806               my ($fixedpath) = $File::Find::name;
       
   807               $fixedpath =~ s#\\#/#g;
       
   808               my ($relpath) = $File::Find::name =~ /$tempdir2(.*)/i;
       
   809               $iFileList2{$relpath} = "right";
       
   810             }
       
   811           }, $tempdir2;
       
   812   
       
   813   #Work out the if the two file lists are different
       
   814   foreach my $file (sort keys %iFileList1)
       
   815   {
       
   816     if (! defined $iFileList2{$file})
       
   817     {
       
   818       # If the filename does not exist in the second filelist the compressed files cannot be the same.
       
   819       print ($log "Did not find $file in $file2\n") if ($verbose);
       
   820       return 0;
       
   821     } else {
       
   822       delete $iFileList2{$file}
       
   823     }
       
   824   }
       
   825   
       
   826   # There are extra files in the second compressed file therefore the compressed files cannot be the same.
       
   827   if (scalar(keys %iFileList2) > 0)
       
   828   {
       
   829     print ($log "$file2 contained more files than $file1\n") if ($verbose);
       
   830     return 0;
       
   831   }
       
   832   
       
   833   print($log "Comparing content\n") if ($verbose);
       
   834   #filelist1 and filelist2 contain all the same filenames, now compare the contents of each file
       
   835   my $same = -1; # Variable to store collated result of comparison, assume an error
       
   836   foreach my $file (keys %iFileList1)
       
   837   {
       
   838     my $type; 
       
   839     ($same, $type) = CompareFiles($tempdir1.$file,$tempdir2.$file, $verbose, $log);
       
   840     print ($log "Comparing $tempdir1.$file against $tempdir2.$file\n") if ($verbose);
       
   841     last if ($same == 0); # do not bother comparing more files if one of the expanded files is different.
       
   842   }
       
   843   
       
   844   #Cleanup the temporary directories
       
   845   rmtree([$tempdir1,$tempdir2]);
       
   846   
       
   847   return $same;
       
   848 }
       
   849 
       
   850 # Create descriptive versions of input files in response to the -d option to MD5 generation
       
   851 sub dumpDescriptiveOutput ($$@)
       
   852 	{
       
   853 	my ($originalFile, $dumpDirFile, @content) = @_;
       
   854 
       
   855 	my $currentDir = cwd;
       
   856 	my $drive = "";
       
   857 	$dumpDirFile =~ s/^.://;  # Remove drive letter 
       
   858 	
       
   859 	$drive = $1 if ($currentDir =~ /^(\w{1}:)\//);
       
   860 
       
   861 	my $DUMPFILE = $dumpDir;
       
   862 	$DUMPFILE = cwd."\\$dumpDir" if ($dumpDir !~ /^(\\|\/|\w{1}:\\)/);
       
   863 	$DUMPFILE = $drive.$dumpDir if ($dumpDir =~ /^\\/);
       
   864 	$DUMPFILE .= "\\" if ($DUMPFILE !~ /(\\|\/)$/);
       
   865 	$DUMPFILE .= $dumpDirFile;
       
   866 	$DUMPFILE =~ s/\//\\/g;
       
   867 
       
   868 	# This is most likely to come about due to maintaining path structures in expanded archives e.g. .chm files
       
   869 	if (length ($DUMPFILE) > 255)
       
   870 		{
       
   871 		print ("Warning: Not attempting to create \"$DUMPFILE\" as it exceeds Windows MAX_PATH limit.\n");
       
   872 		return;
       
   873 		}
       
   874 
       
   875 	mkpath (dirname ($DUMPFILE));
       
   876 
       
   877 	my $success = 0;
       
   878 
       
   879 	if (@content)
       
   880 		{
       
   881 		if (open DUMPFILE, "> $DUMPFILE")
       
   882 			{
       
   883 			print DUMPFILE $_ foreach (@content);
       
   884 			close DUMPFILE;
       
   885 			$success = 1;
       
   886 			}
       
   887 		}
       
   888 	else
       
   889 		{
       
   890 		$success = 1 if (copy ($originalFile, $DUMPFILE));
       
   891 		}
       
   892 
       
   893 	print ("Warning: Cannot create \"$DUMPFILE\".\n") if (!$success);
       
   894 	}
       
   895 
       
   896 
       
   897 #
       
   898 # Filters.
       
   899 #
       
   900 
       
   901 sub Elf2E32Filter {
       
   902   my $line = shift;
       
   903   if ($$line =~ /Time Stamp:|E32ImageFile|Header CRC:/) { # Ignore time stamps, file name and Header CRC which uses the timestamp.
       
   904     $$line = '';
       
   905   }
       
   906   if ($$line =~ /imports from /) {
       
   907   	$$line = lc $$line;	# DLL names are not case-sensitive in the Symbian platform loader
       
   908   }
       
   909 }
       
   910 
       
   911 sub ElfDumpFilter {
       
   912   my $line = shift;
       
   913   $$line  =~ s/^\tProgram header offset.*$/Program header offset/;
       
   914   $$line  =~ s/^\tSection header offset.*$/Section header offset/;
       
   915   $$line  =~ s/#<DLL>(\S+\.\S+)#<\\DLL>/#<DLL>\L$1\E#<\\DLL>/; # DLL names are not case-sensitive in the Symbian platform loader
       
   916   if ($$line =~ /^\.(rel\.)?debug_/) {
       
   917 	$$line = ''; # additional debug-related information - not considered significant
       
   918 	}
       
   919 }
       
   920 
       
   921 sub NmFilter {
       
   922   my $line = shift;
       
   923   $$line =~ s/^.*:$//;                # ignore the filenames
       
   924   $$line =~ s/\.\.\\[^(]*\\//g;
       
   925   $$line =~ s/\.\.\/[^(]*\///g;  # ignore pathnames of object files
       
   926   $$line =~ s/^BFD: (.*)$//;		# ignore the Binary File Descriptor(BFD) warning messages
       
   927   if ($$line =~ /^(.+ (_head|_))\w+_(EPOC32_\w+(_LIB|_iname))$/i) {
       
   928     # dlltool uses the "-o" argument string as the basis for a "unique symbol", but
       
   929     # doesn't turn the name into a canonical form first.
       
   930     # dh.o:
       
   931     #          U ________EPOC32_RELEASE_ARM4_UREL_EIKCOCTL_LIB_iname
       
   932     # 00000000 ? _head_______EPOC32_RELEASE_ARM4_UREL_EIKCOCTL_LIB
       
   933     $$line = uc "$1_..._$3\n";
       
   934   }
       
   935 }
       
   936 
       
   937 
       
   938 sub MapFilter {
       
   939   my $line = shift;
       
   940   $$line =~ s/([d-z])\d*s_?\d+\.o/$1s999.o/;                     # ignore the names of intermediate files in .LIB
       
   941   $$line =~ s/([d-z])\d*([ht])\.o/$1$2.o/;                       # ignore the names of intermediate files in .LIB
       
   942   $$line =~ s-/-\\-go;                                           # convert / into \
       
   943   $$line =~ s/(\.\.\\|.:\\)[^(]*\\//g;                           # ignore pathnames of object files
       
   944   $$line =~ s/\.stab.*$//;                                       # ignore .stab and .stabstr lines
       
   945   $$line =~ s/0x.*size before relaxing//;                        # ignore additional comments about .stab and .stabstr
       
   946   $$line =~ s/(_head|_)\w+_(EPOC32_\w+(_LIB|_iname))/$1_,,,_$3/; # dlltool-generated unique symbols
       
   947   $$line =~ s/Timestamp is .*$//;                                # ignore timestamps in DevStudio map files
       
   948   if ($$line =~ /^ARM Linker,/) {      
       
   949 	$$line = '';
       
   950   }																 # ignore the message that armlink's license will expire. (in RVCT MAP file)
       
   951   if ($$line =~ /^Your license/) {								 
       
   952 	$$line = '';
       
   953   }
       
   954   $$line =~ s/\s__T\d{8}\s/ __Tnnnnnnnn /;                       # ignore RVCT generated internal symbols
       
   955   if ($$line =~ /0x00000000   Number         0 /) {              # ignore filenames in RVCT link maps
       
   956     $$line = '';
       
   957   }
       
   958   
       
   959   # Ignore various case differences:
       
   960   
       
   961   ## RVCT
       
   962   
       
   963   # source filenames turning up in mangled symbols e.g.:
       
   964   #     __sti___13_BALServer_cpp                 0x000087c9   Thumb Code    52  BALServer.o(.text)
       
   965   $$line =~ s/^(\s+__sti___\d+_)(\w+)(.*\(\.text\))$/$1\L$2\E$3/;
       
   966   
       
   967   # object filenames e.g.:
       
   968   #     .text                                    0x0000a01c   Section      164  AssertE.o(.text)
       
   969   $$line =~ s/^(\s+\.text\s+0x[0-9A-Fa-f]{8}\s+Section\s+\d+\s+)(.+)(\(\.text\))$/$1\L$2\E$3/;
       
   970   
       
   971   ## WINSCW
       
   972   
       
   973   # import/static libraries processed listed in the last section e.g.:
       
   974   #1      EDLL.LIB
       
   975   #99     EDLL.LIB (not used)
       
   976   $$line =~ s/^(\d{1,2} {5,6})(\w+\.lib)( \(not used\)|)$/$1\L$2\E$3/i;
       
   977 }
       
   978 
       
   979 sub UnzipFilter {
       
   980   my $line = shift;
       
   981   $$line =~ s/^Archive:.*$/Archive/;                 # ignore the archive names
       
   982   # Line format of unzip -l -v
       
   983   # Length   Method    Size  Ratio   Date   Time   CRC-32    Name, Date can be dd-mm-yy or mm/dd/yy
       
   984   $$line =~ s/ (\d+).*? ..-..-..\s+..:.. / ($1) 99-99-99 99:99 /;  # ignore (Method Size Ratio Date Time) on contained files
       
   985   $$line =~ s^ (\d+).*? ..\/..\/..\s+..:.. ^ ($1) 99-99-99 99:99 ^;  # ignore (Method Size Ratio Date Time) on contained files
       
   986 }
       
   987 
       
   988 sub SgmlFilter {
       
   989   my $line = shift;
       
   990   $$line =~ s/<!--.*-->//;  # ignore comments such as "generated by javadoc"
       
   991 }
       
   992 
       
   993 sub PreprocessedTextFilter {
       
   994   my $line = shift;
       
   995   $$line =~ s/^# \d+ ".*"( \d)?$//;  # ignore #include history
       
   996 }
       
   997 
       
   998 sub FilterCVSTags {
       
   999   my $line = shift;
       
  1000   $$line =~ s#//\s+\$(?:Id|Name|Header|Date|DateTime|Change|File|Revision|Author):.*\$$##m;
       
  1001   # Remove tags like:
       
  1002   # // $Id: //my/perforce/here $
       
  1003   # which may be inserted into source code by some licensees
       
  1004 }
       
  1005 
       
  1006 sub PermanentFileStoreFilter {
       
  1007   my $line = shift;
       
  1008   $$line =~ s/^Dumping .*$/Dumping (file)/;  # ignore the source file names
       
  1009 }
       
  1010 
       
  1011 sub DistributionPolicyFilter {
       
  1012   my $line = shift;
       
  1013   $$line =~ s/# DistPolGen.*//;
       
  1014 }
       
  1015 
       
  1016 sub FilterAll {
       
  1017   my $line = shift;
       
  1018   $$line = '';
       
  1019 }
       
  1020 
       
  1021 sub FilterNone {
       
  1022 }
       
  1023 
       
  1024 1;
       
  1025 
       
  1026 __END__
       
  1027 
       
  1028 =head1 NAME
       
  1029 
       
  1030 EvalidCompare.pm - Utilities for comparing the contents of files.
       
  1031 
       
  1032 =head1 DESCRIPTION
       
  1033 
       
  1034 This package has been largely factored out of the C<e32toolp> tool C<evalid>. The main pieces of borrowed functionality are the ability to identify file types by examining their content, and the ability to filter irrelevant data out of files to allow comparisons to be performed. This refactoring was done in order to allow both direct and indirect comparisons of files to be supported. Direct comparisions are done by reading a pair of files (in the same way the C<evalid> does). Indirect comparisons are done by generating MD5 signatures of the files to be compared. The later method allows comparisons to be performed much more efficiently, because only one file need be present provided the signature of the other is known.
       
  1035 
       
  1036 =head1 INTERFACE
       
  1037 
       
  1038 =head2 CompareFiles
       
  1039 
       
  1040 Expects to be passed a pair of file names. May optionally also be passed a verbosity level (defaults to 0) and a file handle for logging purposes (defaults to *STDIN). Returns 1 if the files match, 0 if not. Firstly does a raw binary compare of the two files. If they match, no further processing is done and 1 is returned. If not, the type of the first file is found and the files are re-compared, this time ignoring data known to be irrelevant for the file type. The result of this compare is then returned.
       
  1041 
       
  1042 =head2 GenerateSignature
       
  1043 
       
  1044 Expects to be passed a file name. May optionally also be passed a verbosity level (defaults to 0) and a file handle for logging purposes (defaults to *STDIN). Returns an MD5 signature of the specified file contents, having ignored irrelevant data associted with its type. This signature may subsequently be used to verify that the contents of the file has not been altered in a significant way.
       
  1045 
       
  1046 =head1 KNOWN BUGS
       
  1047 
       
  1048 None.
       
  1049 
       
  1050 =head1 COPYRIGHT
       
  1051 
       
  1052  Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).
       
  1053  All rights reserved.
       
  1054  This component and the accompanying materials are made available
       
  1055  under the terms of the License "Eclipse Public License v1.0"
       
  1056  which accompanies this distribution, and is available
       
  1057  at the URL "http://www.eclipse.org/legal/epl-v10.html".
       
  1058 
       
  1059  Initial Contributors:
       
  1060  Nokia Corporation - initial contribution.
       
  1061 
       
  1062  Contributors:
       
  1063 
       
  1064  Description: 
       
  1065 
       
  1066 =cut
       
  1067 
       
  1068 __END__