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|
BEGIN {
if ($ENV{PERL_CORE}) {
chdir 't' if -d 't';
@INC = '../lib';
}
}
use lib 't';
use strict;
use warnings;
use bytes;
use Test::More ;
use ZlibTestUtils;
BEGIN {
# use Test::NoWarnings, if available
my $extra = 0 ;
$extra = 1
if eval { require Test::NoWarnings ; import Test::NoWarnings; 1 };
plan tests => 595 + $extra ;
use_ok('Compress::Zlib', 2) ;
use_ok('IO::Compress::Deflate', qw($DeflateError)) ;
use_ok('IO::Uncompress::Inflate', qw($InflateError)) ;
use_ok('Compress::Zlib::FileConstants');
}
sub ReadHeaderInfo
{
my $string = shift || '' ;
my %opts = @_ ;
my $buffer ;
ok my $def = new IO::Compress::Deflate \$buffer, %opts ;
is $def->write($string), length($string) ;
ok $def->close ;
#print "ReadHeaderInfo\n"; hexDump(\$buffer);
ok my $inf = new IO::Uncompress::Inflate \$buffer ;
my $uncomp ;
#ok $inf->read($uncomp) ;
my $actual = 0 ;
my $status = 1 ;
while (($status = $inf->read($uncomp)) > 0) {
$actual += $status ;
}
is $actual, length($string) ;
is $uncomp, $string;
ok ! $inf->error() ;
ok $inf->eof() ;
ok my $hdr = $inf->getHeaderInfo();
ok $inf->close ;
return $hdr ;
}
sub ReadHeaderInfoZlib
{
my $string = shift || '' ;
my %opts = @_ ;
my $buffer ;
ok my $def = new Compress::Zlib::Deflate AppendOutput => 1, %opts ;
cmp_ok $def->deflate($string, $buffer), '==', Z_OK;
cmp_ok $def->flush($buffer), '==', Z_OK;
#print "ReadHeaderInfoZlib\n"; hexDump(\$buffer);
ok my $inf = new IO::Uncompress::Inflate \$buffer ;
my $uncomp ;
#ok $inf->read($uncomp) ;
my $actual = 0 ;
my $status = 1 ;
while (($status = $inf->read($uncomp)) > 0) {
$actual += $status ;
}
is $actual, length($string) ;
is $uncomp, $string;
ok ! $inf->error() ;
ok $inf->eof() ;
ok my $hdr = $inf->getHeaderInfo();
ok $inf->close ;
return $hdr ;
}
sub printHeaderInfo
{
my $buffer = shift ;
my $inf = new IO::Uncompress::Inflate \$buffer ;
my $hdr = $inf->getHeaderInfo();
no warnings 'uninitialized' ;
while (my ($k, $v) = each %$hdr) {
print " $k -> $v\n" ;
}
}
# Check the Deflate Header Parameters
#========================================
my $name = "test.gz" ;
my $lex = new LexFile $name ;
{
title "Check default header settings" ;
my $string = <<EOM;
some text
EOM
my $hdr = ReadHeaderInfo($string);
is $hdr->{CM}, 8, " CM is 8";
is $hdr->{FDICT}, 0, " FDICT is 0";
}
{
title "Check user-defined header settings match zlib" ;
my $string = <<EOM;
some text
EOM
my @tests = (
[ {-Level => 0}, { FLEVEL => ZLIB_FLG_LEVEL_FASTEST} ],
[ {-Level => 1}, { FLEVEL => ZLIB_FLG_LEVEL_FASTEST} ],
[ {-Level => 2}, { FLEVEL => ZLIB_FLG_LEVEL_FAST } ],
[ {-Level => 3}, { FLEVEL => ZLIB_FLG_LEVEL_FAST } ],
[ {-Level => 4}, { FLEVEL => ZLIB_FLG_LEVEL_FAST } ],
[ {-Level => 5}, { FLEVEL => ZLIB_FLG_LEVEL_FAST } ],
[ {-Level => 6}, { FLEVEL => ZLIB_FLG_LEVEL_DEFAULT} ],
[ {-Level => 7}, { FLEVEL => ZLIB_FLG_LEVEL_SLOWEST} ],
[ {-Level => 8}, { FLEVEL => ZLIB_FLG_LEVEL_SLOWEST} ],
[ {-Level => 9}, { FLEVEL => ZLIB_FLG_LEVEL_SLOWEST} ],
[ {-Level => Z_NO_COMPRESSION }, { FLEVEL => ZLIB_FLG_LEVEL_FASTEST} ],
[ {-Level => Z_BEST_SPEED }, { FLEVEL => ZLIB_FLG_LEVEL_FASTEST} ],
[ {-Level => Z_BEST_COMPRESSION}, { FLEVEL => ZLIB_FLG_LEVEL_SLOWEST} ],
[ {-Level => Z_DEFAULT_COMPRESSION}, { FLEVEL => ZLIB_FLG_LEVEL_DEFAULT} ],
[ {-Strategy => Z_HUFFMAN_ONLY}, { FLEVEL => ZLIB_FLG_LEVEL_FASTEST} ],
[ {-Strategy => Z_HUFFMAN_ONLY,
-Level => 3 }, { FLEVEL => ZLIB_FLG_LEVEL_FASTEST} ],
);
foreach my $test (@tests)
{
my $opts = $test->[0] ;
my $expect = $test->[1] ;
my @title ;
while (my ($k, $v) = each %$opts)
{
push @title, "$k => $v";
}
title " Set @title";
my $hdr = ReadHeaderInfo($string, %$opts);
my $hdr1 = ReadHeaderInfoZlib($string, %$opts);
is $hdr->{CM}, 8, " CM is 8";
is $hdr->{CINFO}, 7, " CINFO is 7";
is $hdr->{FDICT}, 0, " FDICT is 0";
while (my ($k, $v) = each %$expect)
{
if (ZLIB_VERNUM >= 0x1220)
{ is $hdr->{$k}, $v, " $k is $v" }
else
{ ok 1, " Skip test for $k" }
}
is $hdr->{CM}, $hdr1->{CM}, " CM matches";
is $hdr->{CINFO}, $hdr1->{CINFO}, " CINFO matches";
is $hdr->{FDICT}, $hdr1->{FDICT}, " FDICT matches";
is $hdr->{FLEVEL}, $hdr1->{FLEVEL}, " FLEVEL matches";
is $hdr->{FCHECK}, $hdr1->{FCHECK}, " FCHECK matches";
}
}
{
title "No compressed data at all";
my $hdr = ReadHeaderInfo("");
is $hdr->{CM}, 8, " CM is 8";
is $hdr->{FDICT}, 0, " FDICT is 0";
ok defined $hdr->{ADLER32}, " ADLER32 is defined" ;
is $hdr->{ADLER32}, 1, " ADLER32 is 1";
}
{
# Header Corruption Tests
my $string = <<EOM;
some text
EOM
my $good ;
ok my $x = new IO::Compress::Deflate \$good ;
ok $x->write($string) ;
ok $x->close ;
{
title "Header Corruption - FCHECK failure - 1st byte wrong";
my $buffer = $good ;
substr($buffer, 0, 1) = "\x00" ;
ok ! new IO::Uncompress::Inflate \$buffer, -Transparent => 0 ;
like $IO::Uncompress::Inflate::InflateError, '/Header Error: CRC mismatch/',
"CRC mismatch";
}
{
title "Header Corruption - FCHECK failure - 2nd byte wrong";
my $buffer = $good ;
substr($buffer, 1, 1) = "\x00" ;
ok ! new IO::Uncompress::Inflate \$buffer, -Transparent => 0 ;
like $IO::Uncompress::Inflate::InflateError, '/Header Error: CRC mismatch/',
"CRC mismatch";
}
sub mkZlibHdr
{
my $method = shift ;
my $cinfo = shift ;
my $fdict = shift ;
my $level = shift ;
my $cmf = ($method & 0x0F) ;
$cmf |= (($cinfo & 0x0F) << 4) ;
my $flg = (($level & 0x03) << 6) ;
$flg |= (($fdict & 0x01) << 5) ;
my $fcheck = 31 - ($cmf * 256 + $flg) % 31 ;
$flg |= $fcheck ;
#print "check $fcheck\n";
return pack("CC", $cmf, $flg) ;
}
{
title "Header Corruption - CM not 8";
my $buffer = $good ;
my $header = mkZlibHdr(3, 6, 0, 3);
substr($buffer, 0, 2) = $header;
my $un = new IO::Uncompress::Inflate \$buffer, -Transparent => 0 ;
ok ! new IO::Uncompress::Inflate \$buffer, -Transparent => 0 ;
like $IO::Uncompress::Inflate::InflateError, '/Header Error: Not Deflate \(CM is 3\)/',
" Not Deflate";
}
}
{
# Trailer Corruption tests
my $string = <<EOM;
some text
EOM
my $good ;
ok my $x = new IO::Compress::Deflate \$good ;
ok $x->write($string) ;
ok $x->close ;
foreach my $trim (-4 .. -1)
{
my $got = $trim + 4 ;
foreach my $s (0, 1)
{
title "Trailer Corruption - Trailer truncated to $got bytes, strict $s" ;
my $buffer = $good ;
my $expected_trailing = substr($good, -4, 4) ;
substr($expected_trailing, $trim) = '';
substr($buffer, $trim) = '';
writeFile($name, $buffer) ;
ok my $gunz = new IO::Uncompress::Inflate $name, Strict => $s;
my $uncomp ;
if ($s)
{
ok $gunz->read($uncomp) < 0 ;
like $IO::Uncompress::Inflate::InflateError,"/Trailer Error: trailer truncated. Expected 4 bytes, got $got/",
"Trailer Error";
}
else
{
is $gunz->read($uncomp), length $string ;
}
ok $gunz->eof() ;
ok $uncomp eq $string;
ok $gunz->close ;
}
}
{
title "Trailer Corruption - CRC Wrong, strict" ;
my $buffer = $good ;
my $crc = unpack("N", substr($buffer, -4, 4));
substr($buffer, -4, 4) = pack('N', $crc+1);
writeFile($name, $buffer) ;
ok my $gunz = new IO::Uncompress::Inflate $name, Strict => 1;
my $uncomp ;
ok $gunz->read($uncomp) < 0 ;
like $IO::Uncompress::Inflate::InflateError,'/Trailer Error: CRC mismatch/',
"Trailer Error: CRC mismatch";
ok $gunz->eof() ;
ok ! ${ $gunz->trailingData() } ;
ok $uncomp eq $string;
ok $gunz->close ;
}
{
title "Trailer Corruption - CRC Wrong, no strict" ;
my $buffer = $good ;
my $crc = unpack("N", substr($buffer, -4, 4));
substr($buffer, -4, 4) = pack('N', $crc+1);
writeFile($name, $buffer) ;
ok my $gunz = new IO::Uncompress::Inflate $name, Strict => 0;
my $uncomp ;
ok $gunz->read($uncomp) >= 0 ;
ok $gunz->eof() ;
ok ! ${ $gunz->trailingData() } ;
ok $uncomp eq $string;
ok $gunz->close ;
}
}
|
