Function zstd_sys::ZSTD_initCStream

pub unsafe extern "C" fn ZSTD_initCStream(
    zcs: *mut ZSTD_CStream, 
    compressionLevel: c_int
) -> usize

Equivalent to:

ZSTD_CCtx_reset(zcs, ZSTD_reset_session_only);
ZSTD_CCtx_refCDict(zcs, NULL); // clear the dictionary (if any)
ZSTD_CCtx_setParameter(zcs, ZSTD_c_compressionLevel, compressionLevel);