Method open_chunk_iterator

ogsr_engine/xrCore/FS.cpp:215–256

}

IReader* IReader::open_chunk_iterator(u32& ID, IReader* _prev)
{
    if (0 == _prev)
    {
        // first
        rewind();
    }
    else
    {
        // next
        seek(_prev->iterpos);
        _prev->close();
    }

    //	open
    if (elapsed() < static_cast<long>(sizeof(u32) * 2))
        return nullptr;

    ID = r_u32();
    size_t _size = r_u32();

    //На всякий случай тут тоже так сделаем по аналогии с find_chunk()
    if (elapsed() < static_cast<long>(_size))
    {
        Msg("!![%s] chunk [%u] has invalid size [%lu], return elapsed size [%d]", __FUNCTION__, ID, _size, elapsed());
        _size = elapsed();
    }

    if (ID & CFS_CompressMark)
    {
        // compressed
        u8* dest;
        size_t dest_sz;
        _decompressLZ(&dest, &dest_sz, pointer(), _size);
        return xr_new<CTempReader>(dest, dest_sz, tell() + _size);
    }
    else
    {
        // normal
        return xr_new<IReader>(pointer(), _size, tell() + _size);
    }
}

constexpr unsigned char boms[]{0xef, 0xbb, 0xbf};