nginx 0.1.27 *) Feature: the "blocked" parameter of the "valid_referers" directive. *) Change: the errors while handling the request header now logged at "info" level. The server name and the "Host" and "Referer" header lines also logged. *) Change: the "Host" header line is also logged in error log. *) Feature: the proxy_pass_unparsed_uri directive. The special handling of the "://" symbols in URI, appeared in 0.1.11 version, now is canceled. *) Bugfix: nginx could not be built on FreeBSD and Linux, if the --without-ngx_http_auth_basic_module configuration parameter was used.

/*
 * Copyright (C) Igor Sysoev
 */


#ifndef _NGX_CRC_H_INCLUDED_
#define _NGX_CRC_H_INCLUDED_


/* 32-bit crc16 */

static ngx_inline uint32_t ngx_crc(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_ */