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| author |  Garima Singh <garima.singh@microsoft.com> | 2020-03-30 00:31:24 +0000 |
|---|---|---|
| committer |  Junio C Hamano <gitster@pobox.com> | 2020-03-30 09:59:53 -0700 |
| commit | f52207a45ca9e7cfbe431f4ffff79b3fdbcf3a37 (patch) | |
| tree | f0cec587c23bece10b7daf2fe2ea9a0a3e8596f0 /t/helper/test-bloom.c | |
| parent | commit-graph: define and use MAX_NUM_CHUNKS (diff) | |
| download | tgif-f52207a45ca9e7cfbe431f4ffff79b3fdbcf3a37.tar.xz | |
bloom.c: add the murmur3 hash implementation
In preparation for computing changed paths Bloom filters,
implement the Murmur3 hash algorithm as described in [1].
It hashes the given data using the given seed and produces
a uniformly distributed hash value.
[1] https://en.wikipedia.org/wiki/MurmurHash#Algorithm
Helped-by: Derrick Stolee <dstolee@microsoft.com>
Helped-by: Szeder Gábor <szeder.dev@gmail.com>
Reviewed-by: Jakub Narębski <jnareb@gmail.com>
Signed-off-by: Garima Singh <garima.singh@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 't/helper/test-bloom.c')
| -rw-r--r-- | t/helper/test-bloom.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/t/helper/test-bloom.c b/t/helper/test-bloom.c new file mode 100644 index 0000000000..60ee204368 --- /dev/null +++ b/t/helper/test-bloom.c @@ -0,0 +1,13 @@ +#include "git-compat-util.h" +#include "bloom.h" +#include "test-tool.h" + +int cmd__bloom(int argc, const char **argv) +{ + if (!strcmp(argv[1], "get_murmur3")) { + uint32_t hashed = murmur3_seeded(0, argv[2], strlen(argv[2])); + printf("Murmur3 Hash with seed=0:0x%08x\n", hashed); + } + + return 0; +}
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