nginx 0.7.31 *) Change: now the "try_files" directive tests files only and ignores directories. *) Feature: the "fastcgi_split_path_info" directive. *) Bugfixes in an "Expect" request header line support. *) Bugfixes in geo ranges. *) Bugfix: in a miss case ngx_http_memcached_module returned the "END" line as response body instead of default 404 page body; the bug had appeared in 0.7.18. Thanks to Maxim Dounin. *) Bugfix: while SMTP proxying nginx issued message "250 2.0.0 OK" instead of "235 2.0.0 OK"; the bug had appeared in 0.7.22. Thanks to Maxim Dounin.

/*
 * 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_ */