Method decompress

code/Common/Compression.cpp:133–173

static constexpr size_t MYBLOCK = 32786;

size_t Compression::decompress(const void *data, size_t in, std::vector<char> &uncompressed) {
    ai_assert(mImpl != nullptr);
    if (data == nullptr || in == 0) {
        return 0l;
    }

    mImpl->mZSstream.next_in = (Bytef*)(data);
    mImpl->mZSstream.avail_in = (uInt)in;

    int ret = 0;
    size_t total = 0l;
    const int flushMode = getFlushMode(mImpl->mFlushMode);
    if (flushMode == Z_FINISH) {
        mImpl->mZSstream.avail_out = static_cast<uInt>(uncompressed.size());
        mImpl->mZSstream.next_out = reinterpret_cast<Bytef *>(&*uncompressed.begin());
        ret = inflate(&mImpl->mZSstream, Z_FINISH);

        if (ret != Z_STREAM_END && ret != Z_OK) {
            throw DeadlyImportError("Compression", "Failure decompressing this file using gzip.");
        }
        total = mImpl->mZSstream.avail_out;
    } else {
        do {
            Bytef block[MYBLOCK] = {};
            mImpl->mZSstream.avail_out = MYBLOCK;
            mImpl->mZSstream.next_out = block;

            ret = inflate(&mImpl->mZSstream, flushMode);

            if (ret != Z_STREAM_END && ret != Z_OK) {
                throw DeadlyImportError("Compression", "Failure decompressing this file using gzip.");
            }
            const size_t have = MYBLOCK - mImpl->mZSstream.avail_out;
            total += have;
            uncompressed.resize(total);
            ::memcpy(uncompressed.data() + total - have, block, have);
        } while (ret != Z_STREAM_END);
    }

    return total;
}

size_t Compression::decompressBlock(const void *data, size_t in, char *out, size_t availableOut) {
    ai_assert(mImpl != nullptr);