Function blosc_sys::blosc_cbuffer_metainfo [−] [src]

pub unsafe extern "C" fn blosc_cbuffer_metainfo(
    cbuffer: *const c_void, 
    typesize: *mut size_t, 
    flags: *mut c_int
)

Return information about a compressed buffer, namely the type size (typesize), as well as some internal flags.

The flags is a set of bits, where the currently used ones are: * bit 0: whether the shuffle filter has been applied or not * bit 1: whether the internal buffer is a pure memcpy or not

You can use the BLOSC_DOSHUFFLE, BLOSC_DOBITSHUFFLE and BLOSC_MEMCPYED symbols for extracting the interesting bits (e.g. flags & BLOSC_DOSHUFFLE says whether the buffer is byte-shuffled or not).

This function should always succeed.