Suggest a lossless highly efficient RLE library

Hi,

I have a bit vector which is nothing but a stream of unsigned char
bytes. Since it's a bit vector it's nothing but number of 0s and 1s.
The length of the vector is as high as 10000000 bytes.
It's a very sparse bit vector.

I am looking for a lossless Run Length Compression library which can
also allow me to do AND/R types of binary operations on the
compressed data w/o having to decompress it myself in the code.

Can anyone suggest me a good library for this?

Thanks.