Method decodeRunLengthMulti

src/OpenLoco/src/S5/SawyerStream.cpp:159–191

}

void SawyerStreamReader::decodeRunLengthMulti(MemoryStream& buffer, std::span<const std::byte> data)
{
    for (size_t i = 0; i < data.size(); i++)
    {
        if (data[i] == std::byte{ 0xFF })
        {
            i++;
            if (i >= data.size())
            {
                throw Exception::RuntimeError(exceptionInvalidRLE);
            }
            buffer.writeValue(data[i]);
        }
        else
        {
            auto offset = static_cast<int32_t>(data[i] >> 3) - 32;
            assert(offset < 0);
            if (static_cast<size_t>(-offset) > buffer.getLength())
            {
                throw Exception::RuntimeError(exceptionInvalidRLE);
            }
            auto copySrc = buffer.data() + buffer.getLength() + offset;
            auto copyLen = (static_cast<size_t>(data[i]) & 7) + 1;

            // Copy it to temp buffer first as we can't copy buffer to itself due to potential
            // realloc in between reserve and push
            std::byte copyBuffer[32];
            assert(copyLen <= sizeof(copyBuffer));
            std::memcpy(copyBuffer, copySrc, copyLen);
            buffer.write(copyBuffer, copyLen);
        }
    }
}

void SawyerStreamReader::decodeRotate(MemoryStream& buffer, std::span<const std::byte> data)
{