bloom: add test helper to return murmur3 hash

In bloom.h, murmur3_seeded_v2() is exported for the use of test murmur3
hash. To clarify that murmur3_seeded_v2() is exported solely for testing
purposes, a new helper function test_murmur3_seeded() was added instead
of exporting murmur3_seeded_v2() directly.

Signed-off-by: Lidong Yan <502024330056@smail.nju.edu.cn>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 3 insertions, 9 deletions

diff --git a/bloom.h b/bloom.h
index 6e46489a20..a9ded1822f 100644
--- a/bloom.h
+++ b/bloom.h
@@ -78,15 +78,6 @@ int load_bloom_filter_from_graph(struct commit_graph *g,
 				 struct bloom_filter *filter,
 				 uint32_t graph_pos);
 
-/*
- * Calculate the murmur3 32-bit hash value for the given data
- * using the given seed.
- * Produces a uniformly distributed hash value.
- * Not considered to be cryptographically secure.
- * Implemented as described in https://en.wikipedia.org/wiki/MurmurHash#Algorithm
- */
-uint32_t murmur3_seeded_v2(uint32_t seed, const char *data, size_t len);
-
 void fill_bloom_key(const char *data,
 		    size_t len,
 		    struct bloom_key *key,
@@ -137,4 +128,7 @@ int bloom_filter_contains(const struct bloom_filter *filter,
 			  const struct bloom_key *key,
 			  const struct bloom_filter_settings *settings);
 
+uint32_t test_bloom_murmur3_seeded(uint32_t seed, const char *data, size_t len,
+				   int version);
+
 #endif