Function QuickLZDecompress

library/cpp/par/compression.cpp:57–79

    }

    void QuickLZDecompress(TVector<char>* dst) {
        if (!dst) {
            return;
        }
        int srcSize = dst->ysize();
        if (srcSize < SIZEOF_SIGNATURE) {
            return;
        }
        if (*(int*)dst->data() != N_SIGNATURE) {
            return;
        }
        TVector<char> unpacked;
        const ICodec* usedCodec = GetCodec();
        for (size_t i = SIZEOF_SIGNATURE; i < (*dst).size();) {
            TBlockLen packedBlockSize = *(TBlockLen*)(dst->data() + i);
            TStringBuf srcDataBlock{dst->data() + i + sizeof(TBlockLen), packedBlockSize};
            size_t unpackedPreviousSize = unpacked.size();
            unpacked.yresize(unpackedPreviousSize + usedCodec->DecompressedLength(srcDataBlock));
            unpacked.yresize(unpackedPreviousSize + usedCodec->Decompress(srcDataBlock, unpacked.data() + unpackedPreviousSize));
            i += packedBlockSize + sizeof(TBlockLen);
        }
        dst->swap(unpacked);
    }
}