Mercurial > hg > nginx-vendor-0-5
diff src/core/ngx_crc32.h @ 250:fbf2b2f66c9f NGINX_0_4_10
nginx 0.4.10
*) Feature: the POP3 proxy supports the APOP command.
*) Bugfix: if the select, poll or /dev/poll methods were used, then
while waiting authentication server response the IMAP/POP3 proxy
hogged CPU.
*) Bugfix: a segmentation fault might occur if the $server_addr
variable was used in the "map" directive.
*) Bugfix: the ngx_http_flv_module did not support the byte ranges for
full responses; bug appeared in 0.4.7.
*) Bugfix: nginx could not be built on Debian amd64; bug appeared in
0.4.9.
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Mon, 23 Oct 2006 00:00:00 +0400 |
parents | |
children | 6eb1e38f0f1f |
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new file mode 100644 --- /dev/null +++ b/src/core/ngx_crc32.h @@ -0,0 +1,55 @@ + +/* + * 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_short; +extern uint32_t ngx_crc32_table256[]; + + +static ngx_inline uint32_t +ngx_crc32_short(u_char *p, size_t len) +{ + u_char c; + uint32_t crc; + + crc = 0xffffffff; + + while (len--) { + c = *p++; + crc = ngx_crc32_table_short[(crc ^ (c & 0xf)) & 0xf] ^ (crc >> 4); + crc = ngx_crc32_table_short[(crc ^ (c >> 4)) & 0xf] ^ (crc >> 4); + } + + return crc ^ 0xffffffff; +} + + +static ngx_inline uint32_t +ngx_crc32_long(u_char *p, size_t len) +{ + uint32_t crc; + + crc = 0xffffffff; + + while (len--) { + crc = ngx_crc32_table256[(crc ^ *p++) & 0xff] ^ (crc >> 8); + } + + return crc ^ 0xffffffff; +} + + +ngx_int_t ngx_crc32_init(ngx_pool_t *pool); + + +#endif /* _NGX_CRC32_H_INCLUDED_ */