annotate src/core/ngx_crc32.h @ 256:2e9c57a5e50a NGINX_0_4_13

nginx 0.4.13 *) Feature: the "proxy_pass" directive may be used inside the "limit_except" block. *) Feature: the "limit_except" directive supports all WebDAV methods. *) Bugfix: if the "add_before_body" directive was used without the "add_after_body" directive, then an response did not transferred complete. *) Bugfix: a large request body did not receive if the epoll method and the deferred accept() were used. *) Bugfix: a charset could not be set for ngx_http_autoindex_module responses; bug appeared in 0.3.50. *) Bugfix: the "[alert] zero size buf" error when FastCGI server was used; *) Bugfix: the --group= configuration parameter was ignored. Thanks to Thomas Moschny. *) Bugfix: the 50th subrequest in SSI response did not work; bug appeared in 0.3.50.
author Igor Sysoev <http://sysoev.ru>
date Wed, 15 Nov 2006 00:00:00 +0300
parents fbf2b2f66c9f
children 6eb1e38f0f1f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
250
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
1
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
2 /*
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
3 * Copyright (C) Igor Sysoev
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
4 */
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
5
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
6
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
7 #ifndef _NGX_CRC32_H_INCLUDED_
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
8 #define _NGX_CRC32_H_INCLUDED_
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
9
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
10
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
11 #include <ngx_config.h>
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
12 #include <ngx_core.h>
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
13
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
14
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
15 extern uint32_t *ngx_crc32_table_short;
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
16 extern uint32_t ngx_crc32_table256[];
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
17
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
18
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
19 static ngx_inline uint32_t
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
20 ngx_crc32_short(u_char *p, size_t len)
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
21 {
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
22 u_char c;
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
23 uint32_t crc;
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
24
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
25 crc = 0xffffffff;
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
26
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
27 while (len--) {
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
28 c = *p++;
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
29 crc = ngx_crc32_table_short[(crc ^ (c & 0xf)) & 0xf] ^ (crc >> 4);
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
30 crc = ngx_crc32_table_short[(crc ^ (c >> 4)) & 0xf] ^ (crc >> 4);
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
31 }
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
32
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
33 return crc ^ 0xffffffff;
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
34 }
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
35
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
36
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
37 static ngx_inline uint32_t
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
38 ngx_crc32_long(u_char *p, size_t len)
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
39 {
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
40 uint32_t crc;
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
41
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
42 crc = 0xffffffff;
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
43
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
44 while (len--) {
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
45 crc = ngx_crc32_table256[(crc ^ *p++) & 0xff] ^ (crc >> 8);
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
46 }
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
47
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
48 return crc ^ 0xffffffff;
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
49 }
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
50
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
51
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
52 ngx_int_t ngx_crc32_init(ngx_pool_t *pool);
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
53
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
54
fbf2b2f66c9f nginx 0.4.10
Igor Sysoev <http://sysoev.ru>
parents:
diff changeset
55 #endif /* _NGX_CRC32_H_INCLUDED_ */