Function ZSTD_compressCCtx
unsafe extern C { unwind: false } fn ZSTD_compressCCtx(cctx: *mut ZSTD_CCtx, dst: *mut c_void, dstCapacity: usize, src: *const c_void, srcSize: usize, compressionLevel: c_int) -> usize
ZSTD_compressCCtx() :
Same as ZSTD_compress(), using an explicit ZSTD_CCtx.
Important : in order to mirror ZSTD_compress() behavior,
this function compresses at the requested compression level,
ignoring any other advanced parameter .
If any advanced parameter was set using the advanced API,
they will all be reset. Only @compressionLevel remains.