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LibCompress: Implement the XZ delta filter

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This commit is contained in:
Tim Schumacher 2023-10-22 19:49:41 +02:00 • committed by Jelle Raaijmakers
parent f0b08e9dea
commit 786e654dfd
3 changed files with 102 additions and 3 deletions
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8
Tests/LibCompress/TestXz.cpp
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@ -1183,8 +1183,8 @@ TEST_CASE(xz_utils_good_1_3delta_lzma2)
auto stream = MUST(try_make<FixedMemoryStream>(compressed));
auto decompressor = MUST(Compress::XzDecompressor::create(move(stream)));
// TODO: This uses the currently unimplemented delta filter.
(void)decompressor->read_until_eof(PAGE_SIZE);
auto buffer = TRY_OR_FAIL(decompressor->read_until_eof(PAGE_SIZE));
EXPECT_EQ(buffer.span(), xz_utils_lorem_ipsum.bytes());
}
TEST_CASE(xz_utils_good_1_arm64_lzma2_1)
@ -1864,7 +1864,9 @@ TEST_CASE(xz_utils_unsupported_filter_flags_2)
auto stream = MUST(try_make<FixedMemoryStream>(compressed));
auto decompressor = MUST(Compress::XzDecompressor::create(move(stream)));
// TODO: The delta filter is currently unimplemented. However, once it is implemented, we likely want to mirror the recommended behavior of the specification anyways.
// TODO: We don't yet check whether the filter chain satisfies the "can't be the last filter"
// requirement. We just happen to get the result right because we try to uncompress the
// test case and fail.
auto buffer_or_error = decompressor->read_until_eof(PAGE_SIZE);
EXPECT(buffer_or_error.is_error());
}