Function common_shim_sampler_prev_str 

pub unsafe extern "C" fn common_shim_sampler_prev_str(
    smpl: *mut common_shim_sampler,
    ctx: *mut llama_context,
    n: i32,
    out_buf: *mut c_char,
    out_len: usize,
    expected_len: *mut usize,
) -> i32