Mercurial > hg > nginx
view src/core/ngx_crc.h @ 8047:1b7c7c3af6d9
Contrib: vim syntax, update core and 3rd party module directives.
List of 3rd party modules github repositories are obtained from
https://github.com/freebsd/freebsd-ports/blob/main/www/nginx-devel/Makefile.extmod
author | Gena Makhomed <gmm@csdoc.com> |
---|---|
date | Sat, 18 Jun 2022 15:54:40 +0300 |
parents | d620f497c50f |
children |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #ifndef _NGX_CRC_H_INCLUDED_ #define _NGX_CRC_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> /* 32-bit crc16 */ static ngx_inline uint32_t ngx_crc(u_char *data, size_t len) { uint32_t sum; for (sum = 0; len; len--) { /* * gcc 2.95.2 x86 and icc 7.1.006 compile * that operator into the single "rol" opcode, * msvc 6.0sp2 compiles it into four opcodes. */ sum = sum >> 1 | sum << 31; sum += *data++; } return sum; } #endif /* _NGX_CRC_H_INCLUDED_ */