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Merge pull request #6 from anall/wip/preset_dictionary
Expose liblzma's 'preset_dict' feature
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,86 @@ | ||
| BEGIN { | ||
| if ($ENV{PERL_CORE}) { | ||
| chdir 't' if -d 't'; | ||
| @INC = ("../lib", "lib/compress"); | ||
| } | ||
| } | ||
|
|
||
| use lib qw(t); | ||
| use strict; | ||
| use warnings; | ||
| use bytes; | ||
|
|
||
| use Test::More tests => 15; | ||
|
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| BEGIN { use_ok('Compress::Raw::Lzma', 2); } | ||
|
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| my $dict = "sphinx of black quartz judge my vow"; | ||
| my $to_compress = "sphinx of black quartz judge my vow" x 100; | ||
|
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| my $filter = Lzma::Filter::Lzma2( | ||
| PresetDict => \$dict, | ||
| DictSize => 1024 * 1024 * 8, | ||
| Lc => 0, | ||
| Lp => 3, | ||
| Pb => LZMA_PB_MAX, | ||
| Mode => LZMA_MODE_NORMAL, | ||
| Nice => 128, | ||
| Mf => LZMA_MF_HC4, | ||
| Depth => 77); | ||
|
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| my $filter_no_dict = Lzma::Filter::Lzma2( | ||
| DictSize => 1024 * 1024 * 8, | ||
| Lc => 0, | ||
| Lp => 3, | ||
| Pb => LZMA_PB_MAX, | ||
| Mode => LZMA_MODE_NORMAL, | ||
| Nice => 128, | ||
| Mf => LZMA_MF_HC4, | ||
| Depth => 77); | ||
|
|
||
| my ($x,$err,$status); | ||
| my $out_no_dict; | ||
| { | ||
| (my $enc, $err) = Compress::Raw::Lzma::RawEncoder->new(Filter => [$filter_no_dict], AppendOutput => 1); | ||
| ok $enc; | ||
| cmp_ok $err, '==', LZMA_OK, " status is LZMA_OK"; | ||
|
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||
| my $tmp = $to_compress; | ||
| $status = $enc->code($tmp, $out_no_dict); | ||
| cmp_ok $status, '==', LZMA_OK, " status is LZMA_OK"; | ||
|
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||
| cmp_ok $enc->flush($out_no_dict), '==', LZMA_STREAM_END, " flush returned LZMA_STREAM_END"; | ||
| } | ||
|
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||
| my $out_dict; | ||
| { | ||
| my ($x,$err,$status); | ||
| (my $enc, $err) = Compress::Raw::Lzma::RawEncoder->new(Filter => [$filter], AppendOutput => 1); | ||
| ok $enc; | ||
| cmp_ok $err, '==', LZMA_OK, " status is LZMA_OK"; | ||
|
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||
| my $tmp = $to_compress; | ||
| $status = $enc->code($tmp, $out_dict); | ||
| cmp_ok $status, '==', LZMA_OK, " status is LZMA_OK"; | ||
|
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| cmp_ok $enc->flush($out_dict), '==', LZMA_STREAM_END, " flush returned LZMA_STREAM_END"; | ||
|
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| cmp_ok length($out_dict), '<', length($out_no_dict), " compressed w/ dictionary is shorter than without"; | ||
| } | ||
|
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| substr($dict,0,2) = 'xx'; # clobber the dictionary, just to make sure this doesn't break anything | ||
|
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| my $out_decompressed; | ||
| { | ||
| my ($x,$err,$status); | ||
| (my $dec, $err) = Compress::Raw::Lzma::RawDecoder->new(Filter => [$filter], AppendOutput => 1); | ||
| ok $dec; | ||
| cmp_ok $err, '==', LZMA_OK, " status is LZMA_OK"; | ||
|
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||
| my $out; | ||
| $status = $dec->code($out_dict, $out_decompressed); | ||
| cmp_ok $status, '==', LZMA_STREAM_END " status is LZMA_STREAM_END"; | ||
|
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| is length($out_decompressed), length($to_compress); | ||
| ok $out_decompressed eq $to_compress; | ||
| } |