Function blosc_sys::blosc_cbuffer_sizes

pub unsafe extern "C" fn blosc_cbuffer_sizes(
    cbuffer: *const c_void, 
    nbytes: *mut size_t, 
    cbytes: *mut size_t, 
    blocksize: *mut size_t
)

Return information about a compressed buffer, namely the number of uncompressed bytes (nbytes) and compressed (cbytes). It also returns the blocksize (which is used internally for doing the compression by blocks).

You only need to pass the first BLOSC_MIN_HEADER_LENGTH bytes of a compressed buffer for this call to work.

This function should always succeed.