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|
use lib 't';
use strict;
use warnings;
use bytes;
use Test::More ;
use CompTestUtils;
sub run
{
my $CompressClass = identify();
my $UncompressClass = getInverse($CompressClass);
my $Error = getErrorRef($CompressClass);
my $UnError = getErrorRef($UncompressClass);
# my $hello = <<EOM ;
#hello world
#this is a test
#some more stuff on this line
#and finally...
#EOM
# ASCII hex equivalent of the text above. This makes the test
# harness behave identically on an EBCDIC platform.
my $hello =
"\x68\x65\x6c\x6c\x6f\x20\x77\x6f\x72\x6c\x64\x0a\x74\x68\x69\x73" .
"\x20\x69\x73\x20\x61\x20\x74\x65\x73\x74\x0a\x73\x6f\x6d\x65\x20" .
"\x6d\x6f\x72\x65\x20\x73\x74\x75\x66\x66\x20\x6f\x6e\x20\x74\x68" .
"\x69\x73\x20\x6c\x69\x6e\x65\x0a\x61\x6e\x64\x20\x66\x69\x6e\x61" .
"\x6c\x6c\x79\x2e\x2e\x2e\x0a" ;
my $blocksize = 10 ;
my ($info, $compressed) = mkComplete($CompressClass, $hello);
my $header_size = $info->{HeaderLength};
my $trailer_size = $info->{TrailerLength};
my $fingerprint_size = $info->{FingerprintLength};
ok 1, "Compressed size is " . length($compressed) ;
ok 1, "Fingerprint size is $fingerprint_size" ;
ok 1, "Header size is $header_size" ;
ok 1, "Trailer size is $trailer_size" ;
foreach my $fb ( qw( filehandle buffer ) )
{
for my $trans ( 0 .. 1)
{
title "Truncating $CompressClass, Source $fb, Transparent $trans";
foreach my $i (1 .. $fingerprint_size-1)
{
my $lex = new LexFile my $name ;
my $input;
title "Fingerprint Truncation - length $i, Transparent $trans";
my $part = substr($compressed, 0, $i);
if ($fb eq 'filehandle')
{
writeFile($name, $part);
$input = $name ;
}
else
{
$input = \$part;
}
my $gz = new $UncompressClass $input,
-BlockSize => $blocksize,
-Transparent => $trans;
if ($trans) {
ok $gz;
ok ! $gz->error() ;
my $buff ;
is $gz->read($buff, 5000), length($part) ;
ok $buff eq $part ;
ok $gz->eof() ;
$gz->close();
}
else {
ok !$gz;
}
}
#
# Any header corruption past the fingerprint is considered catastrophic
# so even if Transparent is set, it should still fail
#
foreach my $i ($fingerprint_size .. $header_size -1)
{
my $lex = new LexFile my $name ;
my $input;
title "Header Truncation - length $i, Source $fb, Transparent $trans";
my $part = substr($compressed, 0, $i);
if ($fb eq 'filehandle')
{
writeFile($name, $part);
$input = $name ;
}
else
{
$input = \$part;
}
ok ! defined new $UncompressClass $input,
-BlockSize => $blocksize,
-Transparent => $trans;
#ok $gz->eof() ;
}
# Test corruption directly after the header
# In this case the uncompression object will have been created,
# so need to check that subsequent reads from the object fail
if ($header_size > 0)
{
for my $mode (qw(block line para record slurp))
{
title "Corruption after header - Mode $mode, Source $fb, Transparent $trans";
my $lex = new LexFile my $name ;
my $input;
my $part = substr($compressed, 0, $header_size);
# Append corrupt data
$part .= "\xFF" x 100 ;
if ($fb eq 'filehandle')
{
writeFile($name, $part);
$input = $name ;
}
else
{
$input = \$part;
}
ok my $gz = new $UncompressClass $input,
-Strict => 1,
-BlockSize => $blocksize,
-Transparent => $trans
or diag $$UnError;
my $un ;
my $status = 1;
if ($mode eq 'block')
{
$status = $gz->read($un) ;
is $status, -1, "got -1";
}
else
{
if ($mode eq 'line')
{
$status = <$gz>;
}
elsif ($mode eq 'para')
{
local $/ = "\n\n";
$status = <$gz>;
}
elsif ($mode eq 'record')
{
local $/ = \ 4;
$status = <$gz>;
}
elsif ($mode eq 'slurp')
{
local $/ ;
$status = <$gz>;
}
is $status, undef, "got undef";
}
ok $gz->error() ;
$gz->close();
}
}
# Back to truncation tests
foreach my $i ($header_size .. length($compressed) - 1 - $trailer_size)
{
next if $i == 0 ;
for my $mode (qw(block line))
{
title "Compressed Data Truncation - length $i, MOde $mode, Source $fb, Transparent $trans";
my $lex = new LexFile my $name ;
my $input;
my $part = substr($compressed, 0, $i);
if ($fb eq 'filehandle')
{
writeFile($name, $part);
$input = $name ;
}
else
{
$input = \$part;
}
ok my $gz = new $UncompressClass $input,
-Strict => 1,
-BlockSize => $blocksize,
-Transparent => $trans
or diag $$UnError;
my $un ;
if ($mode eq 'block')
{
my $status = 1 ;
$status = $gz->read($un) while $status > 0 ;
cmp_ok $status, "<", 0 ;
}
else
{
1 while <$gz> ;
}
ok $gz->error() ;
cmp_ok $gz->errorNo(), '<', 0 ;
# ok $gz->eof()
# or die "EOF";
$gz->close();
}
}
# RawDeflate and Zstandard do not have a trailer
next if $CompressClass eq 'IO::Compress::RawDeflate' ;
next if $CompressClass eq 'IO::Compress::Zstd' ;
title "Compressed Trailer Truncation";
foreach my $i (length($compressed) - $trailer_size .. length($compressed) -1 )
{
foreach my $lax (0, 1)
{
my $lex = new LexFile my $name ;
my $input;
ok 1, "Compressed Trailer Truncation - Length $i, Lax $lax, Transparent $trans" ;
my $part = substr($compressed, 0, $i);
if ($fb eq 'filehandle')
{
writeFile($name, $part);
$input = $name ;
}
else
{
$input = \$part;
}
ok my $gz = new $UncompressClass $input,
-BlockSize => $blocksize,
-Strict => !$lax,
-Append => 1,
-Transparent => $trans;
my $un = '';
my $status = 1 ;
$status = $gz->read($un) while $status > 0 ;
if ($lax)
{
is $un, $hello;
is $status, 0
or diag "Status $status Error is " . $gz->error() ;
ok $gz->eof()
or diag "Status $status Error is " . $gz->error() ;
ok ! $gz->error() ;
}
else
{
cmp_ok $status, "<", 0
or diag "Status $status Error is " . $gz->error() ;
ok $gz->eof()
or diag "Status $status Error is " . $gz->error() ;
ok $gz->error() ;
}
$gz->close();
}
}
}
}
}
1;
|
