annotate src/core/ngx_murmurhash.c @ 664:f5b859b2f097 NGINX_1_1_16

nginx 1.1.16 *) Change: the simultaneous subrequest limit has been raised to 200. *) Feature: the "from" parameter of the "disable_symlinks" directive. *) Feature: the "return" and "error_page" directives can be used to return 307 redirections. *) Bugfix: a segmentation fault might occur in a worker process if the "resolver" directive was used and there was no "error_log" directive specified at global level. Thanks to Roman Arutyunyan. *) Bugfix: a segmentation fault might occur in a worker process if the "proxy_http_version 1.1" or "fastcgi_keep_conn on" directives were used. *) Bugfix: memory leaks. Thanks to Lanshun Zhou. *) Bugfix: in the "disable_symlinks" directive. *) Bugfix: on ZFS filesystem disk cache size might be calculated incorrectly; the bug had appeared in 1.0.1. *) Bugfix: nginx could not be built by the icc 12.1 compiler. *) Bugfix: nginx could not be built by gcc on Solaris; the bug had appeared in 1.1.15.
author Igor Sysoev <http://sysoev.ru>
date Wed, 29 Feb 2012 00:00:00 +0400
parents 8dc007eddbcf
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
622
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
1
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
2 /*
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
3 * Copyright (C) Austin Appleby
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
4 */
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
5
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
6
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
7 #include <ngx_config.h>
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
8 #include <ngx_core.h>
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
9
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
10
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
11 uint32_t
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
12 ngx_murmur_hash2(u_char *data, size_t len)
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
13 {
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
14 uint32_t h, k;
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
15
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
16 h = 0 ^ len;
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
17
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
18 while (len >= 4) {
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
19 k = data[0];
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
20 k |= data[1] << 8;
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
21 k |= data[2] << 16;
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
22 k |= data[3] << 24;
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
23
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
24 k *= 0x5bd1e995;
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
25 k ^= k >> 24;
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
26 k *= 0x5bd1e995;
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
27
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
28 h *= 0x5bd1e995;
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
29 h ^= k;
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
30
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
31 data += 4;
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
32 len -= 4;
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
33 }
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
34
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
35 switch (len) {
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
36 case 3:
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
37 h ^= data[2] << 16;
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
38 case 2:
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
39 h ^= data[1] << 8;
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
40 case 1:
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
41 h ^= data[0];
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
42 h *= 0x5bd1e995;
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
43 }
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
44
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
45 h ^= h >> 13;
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
46 h *= 0x5bd1e995;
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
47 h ^= h >> 15;
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
48
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
49 return h;
8dc007eddbcf nginx 1.0.1
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
50 }