Mercurial > hg > nginx-vendor-current
annotate src/core/ngx_crc.h @ 682:5cb5db9975ba NGINX_1_3_4
nginx 1.3.4
*) Change: the "ipv6only" parameter is now turned on by default for
listening IPv6 sockets.
*) Feature: the Clang compiler support.
*) Bugfix: extra listening sockets might be created.
Thanks to Roman Odaisky.
*) Bugfix: nginx/Windows might hog CPU if a worker process failed to
start.
Thanks to Ricardo Villalobos Guevara.
*) Bugfix: the "proxy_pass_header", "fastcgi_pass_header",
"scgi_pass_header", "uwsgi_pass_header", "proxy_hide_header",
"fastcgi_hide_header", "scgi_hide_header", and "uwsgi_hide_header"
directives might be inherited incorrectly.
author | Igor Sysoev <http://sysoev.ru> |
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date | Tue, 31 Jul 2012 00:00:00 +0400 |
parents | d0f7a625f27c |
children |
rev | line source |
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0 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
660 | 4 * Copyright (C) Nginx, Inc. |
0 | 5 */ |
6 | |
7 | |
8 #ifndef _NGX_CRC_H_INCLUDED_ | |
9 #define _NGX_CRC_H_INCLUDED_ | |
10 | |
11 | |
250 | 12 #include <ngx_config.h> |
13 #include <ngx_core.h> | |
14 | |
15 | |
0 | 16 /* 32-bit crc16 */ |
17 | |
248 | 18 static ngx_inline uint32_t |
250 | 19 ngx_crc(u_char *data, size_t len) |
0 | 20 { |
21 uint32_t sum; | |
22 | |
23 for (sum = 0; len; len--) { | |
24 | |
25 /* | |
248 | 26 * gcc 2.95.2 x86 and icc 7.1.006 compile |
27 * that operator into the single "rol" opcode, | |
0 | 28 * msvc 6.0sp2 compiles it into four opcodes. |
29 */ | |
30 sum = sum >> 1 | sum << 31; | |
31 | |
32 sum += *data++; | |
33 } | |
34 | |
35 return sum; | |
36 } | |
37 | |
38 | |
39 #endif /* _NGX_CRC_H_INCLUDED_ */ |