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LibCompress: Make the Zlib decompressor fail gracefuly

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This commit adds a verify-less try_create method to the Zlib
decompressor to allow for graceful failures of parsing the
Zlib headers.
This commit is contained in:
Idan Horowitz 2021-03-15 17:03:42 +02:00 • committed by Andreas Kling
parent a7b5a58509
commit f532421c9c
2 changed files with 33 additions and 19 deletions
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7
Userland/Libraries/LibCompress/Zlib.h
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@ -34,21 +34,22 @@ namespace Compress {
class Zlib {
public:
Zlib(ReadonlyBytes data);
Optional<ByteBuffer> decompress();
u32 checksum();
static Optional<Zlib> try_create(ReadonlyBytes data);
static Optional<ByteBuffer> decompress_all(ReadonlyBytes);
private:
Zlib(const ReadonlyBytes& data);
u8 m_compression_method;
u8 m_compression_info;
u8 m_check_bits;
u8 m_has_dictionary;
u8 m_compression_level;
u32 m_checksum;
u32 m_checksum { 0 };
ReadonlyBytes m_input_data;
ReadonlyBytes m_data_bytes;
};