Mercurial > hg > nginx-vendor-1-0
annotate src/core/ngx_crc.h @ 268:a0c9f21ee120 NGINX_0_5_4
nginx 0.5.4
*) Feature: the "perl" directive may be used inside the "limit_except"
block.
*) Bugfix: the ngx_http_dav_module required the "Date" request header
line for the DELETE method.
*) Bugfix: if one only parameter was used in the "dav_access"
directive, then nginx might report about configuration error.
*) Bugfix: a segmentation fault might occur if the $host variable was
used; bug appeared in 0.4.14.
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Fri, 15 Dec 2006 00:00:00 +0300 |
parents | fbf2b2f66c9f |
children | ad25218fd14b |
rev | line source |
---|---|
0 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4 */ | |
5 | |
6 | |
7 #ifndef _NGX_CRC_H_INCLUDED_ | |
8 #define _NGX_CRC_H_INCLUDED_ | |
9 | |
10 | |
250 | 11 #include <ngx_config.h> |
12 #include <ngx_core.h> | |
13 | |
14 | |
0 | 15 /* 32-bit crc16 */ |
16 | |
248 | 17 static ngx_inline uint32_t |
250 | 18 ngx_crc(u_char *data, size_t len) |
0 | 19 { |
20 uint32_t sum; | |
21 | |
22 for (sum = 0; len; len--) { | |
23 | |
24 /* | |
248 | 25 * gcc 2.95.2 x86 and icc 7.1.006 compile |
26 * that operator into the single "rol" opcode, | |
0 | 27 * msvc 6.0sp2 compiles it into four opcodes. |
28 */ | |
29 sum = sum >> 1 | sum << 31; | |
30 | |
31 sum += *data++; | |
32 } | |
33 | |
34 return sum; | |
35 } | |
36 | |
37 | |
38 #endif /* _NGX_CRC_H_INCLUDED_ */ |