nginx 0.3.16 *) Feature: the ngx_http_map_module. *) Feature: the "types_hash_max_size" and "types_hash_bucket_size" directives. *) Feature: the "ssi_value_length" directive. *) Feature: the "worker_rlimit_core" directive. *) Workaround: the connection number in logs was always 1 if nginx was built by the icc 8.1 or 9.0 compilers with optimization for Pentium 4. *) Bugfix: the "config timefmt" SSI command set incorrect time format. *) Bugfix: nginx did not close connection to IMAP/POP3 backend for the SSL connections; bug appeared in 0.3.13. Thanks to Rob Mueller. *) Bugfix: segmentation fault may occurred in at SSL shutdown; bug appeared in 0.3.13.

/*
 * 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_ */