nginx 0.6.23 *) Change: the "off" parameter in the "ssl_session_cache" directive; now this is default parameter. *) Change: the "open_file_cache_retest" directive was renamed to the "open_file_cache_valid". *) Feature: the "open_file_cache_min_uses" directive. *) Feature: the ngx_http_gzip_static_module. *) Feature: the "gzip_disable" directive. *) Feature: the "memcached_pass" directive may be used inside the "if" block. *) Bugfix: a segmentation fault occurred in worker process, if the "memcached_pass" and "if" directives were used in the same location. *) Bugfix: if a "satisfy_any on" directive was used and not all access and auth modules directives were set, then other given access and auth directives were not tested; *) Bugfix: regex parameters in a "valid_referers" directive were not inherited from previous level. *) Bugfix: a "post_action" directive did run if a request was completed with 499 status code. *) Bugfix: optimization of 16K buffer usage in a SSL connection. Thanks to Ben Maurer. *) Bugfix: the STARTTLS in SMTP mode did not work. Thanks to Oleg Motienko. *) Bugfix: in HTTPS mode requests might fail with the "bad write retry" error; bug appeared in 0.5.13.

/*
 * 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_ */