Function sxt_fixed_packed_multiexponentiation 

pub unsafe extern "C" fn sxt_fixed_packed_multiexponentiation(
    res: *mut c_void,
    handle: *const sxt_multiexp_handle,
    output_bit_table: *const c_uint,
    num_outputs: c_uint,
    n: c_uint,
    scalars: *const u8,
)

Compute a multiexponentiation of scalars in packed format using a handle to pre-specified generators.

On completion res contains an array of size num_outputs for the multiexponentiation of the given scalars array.

An entry output_bit_table[output_index] specifies the number of scalar bits used for output_index.

Put bit_sum = sum_{output_index} output_bit_table[output_index] and let num_bytes denote the smallest integer greater than or equal to bit_sum that is a multiple of 8.

scalars specifies a contiguous multi-dimension num_bytes by n array laid out in a packed column-major order as specified by output_bit_table. A given row determines the scalar exponents for generator g_i with the output scalars packed contiguously and padded with zeros.

Note: res must match the generator type of the curve. See sxt_multiexp_handle_new for the types.