Mercurial > hg > nginx-vendor-current
annotate src/core/ngx_crc.h @ 660:d0f7a625f27c NGINX_1_1_14
nginx 1.1.14
*) Feature: multiple "limit_req" limits may be used simultaneously.
*) Bugfix: in error handling while connecting to a backend.
Thanks to Piotr Sikora.
*) Bugfix: in AIO error handling on FreeBSD.
*) Bugfix: in the OpenSSL library initialization.
*) Bugfix: the "proxy_redirect" directives might not be correctly
inherited.
*) Bugfix: memory leak during reconfiguration if the "pcre_jit"
directive was used.
| author | Igor Sysoev <http://sysoev.ru> |
|---|---|
| date | Mon, 30 Jan 2012 00:00:00 +0400 |
| parents | fbf2b2f66c9f |
| children |
| rev | line source |
|---|---|
| 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_ */ |