Provide an interface for fuzzing sequence producer plugins

tests/fuzz/dictionary_loader.c

@@ -20,6 +20,7 @@
 #include "fuzz_helpers.h"
 #include "zstd_helpers.h"
 #include "fuzz_data_producer.h"
+#include "fuzz_third_party_seq_prod.h"
 
 /**
  * Compresses the data and returns the compressed size or an error.
@@ -35,7 +36,7 @@ static size_t compress(void* compressed, size_t compressedCapacity,
     if (refPrefix)
         FUZZ_ZASSERT(ZSTD_CCtx_refPrefix_advanced(
             cctx, dict, dictSize, dictContentType));
-    else 
+    else
         FUZZ_ZASSERT(ZSTD_CCtx_loadDictionary_advanced(
             cctx, dict, dictSize, dictLoadMethod, dictContentType));
     size_t const compressedSize = ZSTD_compress2(
@@ -67,6 +68,7 @@ static size_t decompress(void* result, size_t resultCapacity,
 
 int LLVMFuzzerTestOneInput(const uint8_t *src, size_t size)
 {
+    FUZZ_SEQ_PROD_SETUP();
     FUZZ_dataProducer_t *producer = FUZZ_dataProducer_create(src, size);
     int const refPrefix = FUZZ_dataProducer_uint32Range(producer, 0, 1) != 0;
     ZSTD_dictLoadMethod_e const dlm =
@@ -99,5 +101,6 @@ out:
     free(cBuf);
     free(rBuf);
     FUZZ_dataProducer_free(producer);
+    FUZZ_SEQ_PROD_TEARDOWN();
     return 0;
 }