Contents

/*
 * 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_ */

Version data entries

35 entries across 35 versions & 1 rubygems

Version	Path
nginxtra-1.2.7.8	vendor/nginx/src/core/ngx_crc.h
nginxtra-1.2.6.8	vendor/nginx/src/core/ngx_crc.h
nginxtra-1.2.6.7	vendor/nginx/src/core/ngx_crc.h
nginxtra-1.2.5.7	vendor/nginx/src/core/ngx_crc.h
nginxtra-1.2.4.7	vendor/nginx/src/core/ngx_crc.h
nginxtra-1.2.3.7	vendor/nginx/src/core/ngx_crc.h
nginxtra-1.2.3.6	vendor/nginx/src/core/ngx_crc.h
nginxtra-1.2.3.5	vendor/nginx/src/core/ngx_crc.h
nginxtra-1.2.3.4	vendor/nginx/src/core/ngx_crc.h
nginxtra-1.2.2.4	vendor/nginx/src/core/ngx_crc.h
nginxtra-1.2.2.3	src/nginx/src/core/ngx_crc.h
nginxtra-1.2.1.3	src/nginx/src/core/ngx_crc.h
nginxtra-1.2.1.2	src/nginx/src/core/ngx_crc.h
nginxtra-1.2.0.1	src/nginx/src/core/ngx_crc.h
nginxtra-1.0.15.0	src/nginx/src/core/ngx_crc.h