— Function: const char * gsl_qrng_name (const gsl_qrng * q)

This function returns a pointer to the name of the generator.

— Function: size_t gsl_qrng_size (const gsl_qrng * q)
— Function: void * gsl_qrng_state (const gsl_qrng * q)

These functions return a pointer to the state of generator r and its size. You can use this information to access the state directly. For example, the following code will write the state of a generator to a stream,

          void * state = gsl_qrng_state (q);
          size_t n = gsl_qrng_size (q);
          fwrite (state, n, 1, stream);