Function ZSTD_CCtx_loadDictionary

pub unsafe extern "C" fn ZSTD_CCtx_loadDictionary(
    cctx: *mut ZSTD_CCtx,
    dict: *const c_void,
    dictSize: usize,
) -> usize

ZSTD_CCtx_loadDictionary() : Requires v1.4.0+ Create an internal CDict from dict buffer. Decompression will have to use same dictionary. @result : 0, or an error code (which can be tested with ZSTD_isError()). Special: Loading a NULL (or 0-size) dictionary invalidates previous dictionary, meaning “return to no-dictionary mode”. Note 1 : Dictionary is sticky, it will be used for all future compressed frames, until parameters are reset, a new dictionary is loaded, or the dictionary is explicitly invalidated by loading a NULL dictionary. Note 2 : Loading a dictionary involves building tables. It’s also a CPU consuming operation, with non-negligible impact on latency. Tables are dependent on compression parameters, and for this reason, compression parameters can no longer be changed after loading a dictionary. Note 3 :dict content will be copied internally. Use experimental ZSTD_CCtx_loadDictionary_byReference() to reference content instead. In such a case, dictionary buffer must outlive its users. Note 4 : Use ZSTD_CCtx_loadDictionary_advanced() to precisely select how dictionary content must be interpreted. Note 5 : This method does not benefit from LDM (long distance mode). If you want to employ LDM on some large dictionary content, prefer employing ZSTD_CCtx_refPrefix() described below.