nginx 0.3.48 *) Change: now the ngx_http_charset_module works for subrequests, if the response has no "Content-Type" header line. *) Bugfix: if the "proxy_pass" directive has no URI part, then the "proxy_redirect default" directive add the unnecessary slash in start of the rewritten redirect. *) Bugfix: the internal redirect always transform client's HTTP method to GET, now the transformation is made for the "X-Accel-Redirect" redirects only and if the method is not HEAD; bug appeared in 0.3.42. *) Bugfix: the ngx_http_perl_module could not be built, if the perl was built with the threads support; bug appeared in 0.3.46.

/*
 * 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_ */