diff options
author | Yu Ping <ping.yu@intel.com> | 2020-02-21 22:36:20 +0800 |
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committer | Florin Coras <fcoras@cisco.com> | 2020-02-22 00:30:48 +0000 |
commit | 54346b61f91008c5098243b588f184ad92ad29c9 (patch) | |
tree | 60116fad568970aee2538a081de0560b0487db8c /nginx/src/core/ngx_murmurhash.c | |
parent | 4b0794f139564682503fcd2f59c7bcd3238e6633 (diff) |
initial version of VSAP
Signed-off-by: Yu Ping <ping.yu@intel.com>
Change-Id: I04d9150f0c7607ba20de9096b452476eff1622fc
Diffstat (limited to 'nginx/src/core/ngx_murmurhash.c')
-rw-r--r-- | nginx/src/core/ngx_murmurhash.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/nginx/src/core/ngx_murmurhash.c b/nginx/src/core/ngx_murmurhash.c new file mode 100644 index 0000000..5ade658 --- /dev/null +++ b/nginx/src/core/ngx_murmurhash.c @@ -0,0 +1,52 @@ + +/* + * Copyright (C) Austin Appleby + */ + + +#include <ngx_config.h> +#include <ngx_core.h> + + +uint32_t +ngx_murmur_hash2(u_char *data, size_t len) +{ + uint32_t h, k; + + h = 0 ^ len; + + while (len >= 4) { + k = data[0]; + k |= data[1] << 8; + k |= data[2] << 16; + k |= data[3] << 24; + + k *= 0x5bd1e995; + k ^= k >> 24; + k *= 0x5bd1e995; + + h *= 0x5bd1e995; + h ^= k; + + data += 4; + len -= 4; + } + + switch (len) { + case 3: + h ^= data[2] << 16; + /* fall through */ + case 2: + h ^= data[1] << 8; + /* fall through */ + case 1: + h ^= data[0]; + h *= 0x5bd1e995; + } + + h ^= h >> 13; + h *= 0x5bd1e995; + h ^= h >> 15; + + return h; +} |