Making fuzzers use dataProducer api instead of random seed for decisions

1 files changed, 25 insertions, 0 deletions

diff --git a/ossfuzz/fuzz_data_producer.c b/ossfuzz/fuzz_data_producer.c
index 992f5a7..f35bd8a 100644
--- a/ossfuzz/fuzz_data_producer.c
+++ b/ossfuzz/fuzz_data_producer.c
@@ -39,6 +39,31 @@ uint32_t FUZZ_dataProducer_uint32(FUZZ_dataProducer_t *producer, uint32_t min,
   return min + result % (range + 1);
 }
 
+LZ4F_frameInfo_t FUZZ_dataProducer_frameInfo(FUZZ_dataProducer_t* producer)
+{
+    LZ4F_frameInfo_t info = LZ4F_INIT_FRAMEINFO;
+    info.blockSizeID = FUZZ_dataProducer_uint32(producer, LZ4F_max64KB - 1, LZ4F_max4MB);
+    if (info.blockSizeID < LZ4F_max64KB) {
+        info.blockSizeID = LZ4F_default;
+    }
+    info.blockMode = FUZZ_dataProducer_uint32(producer, LZ4F_blockLinked, LZ4F_blockIndependent);
+    info.contentChecksumFlag = FUZZ_dataProducer_uint32(producer, LZ4F_noContentChecksum,
+                                           LZ4F_contentChecksumEnabled);
+    info.blockChecksumFlag = FUZZ_dataProducer_uint32(producer, LZ4F_noBlockChecksum,
+                                         LZ4F_blockChecksumEnabled);
+    return info;
+}
+
+LZ4F_preferences_t FUZZ_dataProducer_preferences(FUZZ_dataProducer_t* producer)
+{
+    LZ4F_preferences_t prefs = LZ4F_INIT_PREFERENCES;
+    prefs.frameInfo = FUZZ_dataProducer_frameInfo(producer);
+    prefs.compressionLevel = FUZZ_dataProducer_uint32(producer, 0, LZ4HC_CLEVEL_MAX + 3) - 3;
+    prefs.autoFlush = FUZZ_dataProducer_uint32(producer, 0, 1);
+    prefs.favorDecSpeed = FUZZ_dataProducer_uint32(producer, 0, 1);
+    return prefs;
+}
+
 size_t FUZZ_dataProducer_remainingBytes(FUZZ_dataProducer_t *producer){
   return producer->size;
 }