Mercurial > hg > nginx-vendor-current
diff src/core/ngx_murmurhash.c @ 622:8dc007eddbcf NGINX_1_0_1
nginx 1.0.1
*) Change: now the "split_clients" directive uses MurmurHash2 algorithm
because of better distribution.
Thanks to Oleg Mamontov.
*) Change: now long strings starting with zero are not considered as
false values.
Thanks to Maxim Dounin.
*) Change: now nginx uses a default listen backlog value 511 on Linux.
*) Feature: the $upstream_... variables may be used in the SSI and perl
modules.
*) Bugfix: now nginx limits better disk cache size.
Thanks to Oleg Mamontov.
*) Bugfix: a segmentation fault might occur while parsing incorrect
IPv4 address; the bug had appeared in 0.9.3.
Thanks to Maxim Dounin.
*) Bugfix: nginx could not be built by gcc 4.6 without --with-debug
option.
*) Bugfix: nginx could not be built on Solaris 9 and earlier; the bug
had appeared in 0.9.3.
Thanks to Dagobert Michelsen.
*) Bugfix: $request_time variable had invalid values if subrequests
were used; the bug had appeared in 0.8.47.
Thanks to Igor A. Valcov.
author | Igor Sysoev <http://sysoev.ru> |
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date | Tue, 03 May 2011 00:00:00 +0400 |
parents | |
children |
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new file mode 100644 --- /dev/null +++ b/src/core/ngx_murmurhash.c @@ -0,0 +1,50 @@ + +/* + * 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; + case 2: + h ^= data[1] << 8; + case 1: + h ^= data[0]; + h *= 0x5bd1e995; + } + + h ^= h >> 13; + h *= 0x5bd1e995; + h ^= h >> 15; + + return h; +}