nginx 0.5.23 *) Feature: the ngx_http_ssl_module supports Server Name Indication TLS extension. *) Feature: the "fastcgi_catch_stderr" directive. Thanks to Nick S. Grechukh, OWOX project. *) Bugfix: a segmentation fault occurred in master process if two virtual servers should bind() to the overlapping ports. *) Bugfix: if nginx was built with ngx_http_perl_module and perl supported threads, then during second reconfiguration the error messages "panic: MUTEX_LOCK" and "perl_parse() failed" were issued. *) Bugfix: in the HTTPS protocol in the "proxy_pass" directive.

/*
 * Copyright (C) Igor Sysoev
 */


#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_ */