Function deflateStateCheck

zlib/deflate.c:538–556

========================================================================= * Check for a valid deflate stream state. Return 0 if ok, 1 if not. */

 * Check for a valid deflate stream state. Return 0 if ok, 1 if not.
 */
local int deflateStateCheck(z_streamp strm) {
    deflate_state *s;
    if (strm == Z_NULL ||
        strm->zalloc == (alloc_func)0 || strm->zfree == (free_func)0)
        return 1;
    s = strm->state;
    if (s == Z_NULL || s->strm != strm || (s->status != INIT_STATE &&
#ifdef GZIP
                                           s->status != GZIP_STATE &&
#endif
                                           s->status != EXTRA_STATE &&
                                           s->status != NAME_STATE &&
                                           s->status != COMMENT_STATE &&
                                           s->status != HCRC_STATE &&
                                           s->status != BUSY_STATE &&
                                           s->status != FINISH_STATE))
        return 1;
    return 0;
}

/* ========================================================================= */
int ZEXPORT deflateSetDictionary(z_streamp strm, const Bytef *dictionary,