Function zstd_sys::ZSTD_getFrameHeader

pub unsafe extern "C" fn ZSTD_getFrameHeader(
    zfhPtr: *mut ZSTD_frameHeader,
    src: *const c_void,
    srcSize: usize
) -> usize

ZSTD_getFrameHeader() : decode Frame Header, or requires larger srcSize. @return : 0, zfhPtr is correctly filled, >0, srcSize is too small, value is wanted srcSize amount, or an error code, which can be tested using ZSTD_isError()