Syslog: removed usage of ngx_cycle->log and ngx_cycle->hostname. During initial startup the ngx_cycle->hostname is not available, and previously this resulted in incorrect logging. Instead, hostname from the configuration being parsed is now preserved in the syslog peer structure and then used during logging. Similarly, ngx_cycle->log might not match the configuration where the syslog peer is defined if the configuration is not yet fully applied, and previously this resulted in unexpected logging of syslog errors and debug information. Instead, cf->cycle->new_log is now referenced in the syslog peer structure and used for logging, similarly to how it is done in other modules.

/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


#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_ */