mirror of
https://github.com/nginx/nginx.git
synced 2024-12-16 14:19:00 +08:00
34 lines
455 B
C
34 lines
455 B
C
|
|
/*
|
|
* Copyright (C) Igor Sysoev
|
|
*/
|
|
|
|
|
|
#ifndef _NGX_CRC32_H_INCLUDED_
|
|
#define _NGX_CRC32_H_INCLUDED_
|
|
|
|
|
|
#include <ngx_config.h>
|
|
#include <ngx_core.h>
|
|
|
|
|
|
extern uint32_t ngx_crc32_table[];
|
|
|
|
|
|
static ngx_inline uint32_t
|
|
ngx_crc32(u_char *p, size_t len)
|
|
{
|
|
uint32_t crc;
|
|
|
|
crc = 0xffffffff;
|
|
|
|
while (len--) {
|
|
crc = ngx_crc32_table[(crc ^ *p++) & 0xff] ^ (crc >> 8);
|
|
}
|
|
|
|
return crc ^ 0xffffffff;
|
|
}
|
|
|
|
|
|
#endif /* _NGX_CRC32_H_INCLUDED_ */
|