handling nil case for refprefix

2020-04-07 14:41:53 -07:00
parent 794f03459e
commit 1658ae75cd
1 changed files with 5 additions and 3 deletions
@@ -945,9 +945,11 @@ size_t ZSTD_CCtx_refPrefix_advanced(
 {
    RETURN_ERROR_IF(cctx->streamStage != zcss_init, stage_wrong);
    ZSTD_clearAllDicts(cctx);
-    cctx->prefixDict.dict = prefix;
-    cctx->prefixDict.dictSize = prefixSize;
-    cctx->prefixDict.dictContentType = dictContentType;
+    if (prefix != NULL && prefixSize > 0) {
+        cctx->prefixDict.dict = prefix;
+        cctx->prefixDict.dictSize = prefixSize;
+        cctx->prefixDict.dictContentType = dictContentType;
+    }
    return 0;
 }