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LibCompress: Switch ZlibCompressor
to a constructor pattern
We don't have anything fallible in the constructor yet, but what's there should be fallible and once we switch to Core::Stream it will be fallible.
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23a9d62f39
commit
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3 changed files with 21 additions and 18 deletions
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@ -68,16 +68,22 @@ u32 ZlibDecompressor::checksum()
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return m_checksum;
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}
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ZlibCompressor::ZlibCompressor(OutputStream& stream, ZlibCompressionLevel compression_level)
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: m_output_stream(stream)
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ErrorOr<NonnullOwnPtr<ZlibCompressor>> ZlibCompressor::construct(OutputStream& stream, ZlibCompressionLevel compression_level)
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{
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// Zlib only defines Deflate as a compression method.
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auto compression_method = ZlibCompressionMethod::Deflate;
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write_header(compression_method, compression_level);
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auto zlib_compressor = TRY(adopt_nonnull_own_or_enomem(new (nothrow) ZlibCompressor(stream, compression_level)));
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zlib_compressor->write_header(compression_method, compression_level);
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return zlib_compressor;
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}
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ZlibCompressor::ZlibCompressor(OutputStream& stream, ZlibCompressionLevel compression_level)
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: m_output_stream(stream)
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// FIXME: Find a way to compress with Deflate's "Best" compression level.
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m_compressor = make<DeflateCompressor>(stream, static_cast<DeflateCompressor::CompressionLevel>(compression_level));
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, m_compressor(make<DeflateCompressor>(stream, static_cast<DeflateCompressor::CompressionLevel>(compression_level)))
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{
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}
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ZlibCompressor::~ZlibCompressor()
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@ -139,17 +145,17 @@ void ZlibCompressor::finish()
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m_finished = true;
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}
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Optional<ByteBuffer> ZlibCompressor::compress_all(ReadonlyBytes bytes, ZlibCompressionLevel compression_level)
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ErrorOr<ByteBuffer> ZlibCompressor::compress_all(ReadonlyBytes bytes, ZlibCompressionLevel compression_level)
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{
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DuplexMemoryStream output_stream;
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ZlibCompressor zlib_stream { output_stream, compression_level };
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auto zlib_stream = TRY(ZlibCompressor::construct(output_stream, compression_level));
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zlib_stream.write_or_error(bytes);
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zlib_stream->write_or_error(bytes);
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zlib_stream.finish();
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zlib_stream->finish();
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if (zlib_stream.handle_any_error())
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return {};
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if (zlib_stream->handle_any_error())
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return Error::from_string_literal("Underlying ZlibStream indicated an error");
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return output_stream.copy_into_contiguous_buffer();
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}
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