annotate src/core/ngx_crc32.h @ 644:ad25218fd14b NGINX_1_0_12

nginx 1.0.12 *) Feature: the "TLSv1.1" and "TLSv1.2" parameters of the "ssl_protocols" directive. *) Feature: the "if" SSI command supports captures in regular expressions. *) Bugfix: the "if" SSI command did not work inside the "block" command. *) Bugfix: in AIO error handling on FreeBSD. *) Bugfix: in the OpenSSL library initialization. *) Bugfix: the "worker_cpu_affinity" directive might not work. *) Bugfix: the "limit_conn_log_level" and "limit_req_log_level" directives might not work. *) Bugfix: the "read_ahead" directive might not work combined with "try_files" and "open_file_cache". *) Bugfix: the "proxy_cache_use_stale" directive with "error" parameter did not return answer from cache if there were no live upstreams. *) Bugfix: a segmentation fault might occur in a worker process if small time was used in the "inactive" parameter of the "proxy_cache_path" directive. *) Bugfix: responses from cache might hang. *) Bugfix: in error handling while connecting to a backend. Thanks to Piotr Sikora. *) Bugfix: in the "epoll" event method. Thanks to Yichun Zhang. *) Bugfix: the $sent_http_cache_control variable might contain a wrong value if the "expires" directive was used. Thanks to Yichun Zhang. *) Bugfix: the "limit_rate" directive did not allow to use full throughput, even if limit value was very high. *) Bugfix: the "sendfile_max_chunk" directive did not work, if the "limit_rate" directive was used. *) Bugfix: nginx could not be built on Solaris; the bug had appeared in 1.0.11. *) Bugfix: in the ngx_http_scgi_module. *) Bugfix: in the ngx_http_mp4_module.
author Igor Sysoev <http://sysoev.ru>
date Mon, 06 Feb 2012 00:00:00 +0400
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 * Copyright (C) Nginx, Inc.
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5 */
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8 #ifndef _NGX_CRC32_H_INCLUDED_
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9 #define _NGX_CRC32_H_INCLUDED_
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12 #include <ngx_config.h>
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13 #include <ngx_core.h>
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16 extern uint32_t *ngx_crc32_table_short;
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17 extern uint32_t ngx_crc32_table256[];
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20 static ngx_inline uint32_t
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21 ngx_crc32_short(u_char *p, size_t len)
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22 {
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23 u_char c;
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24 uint32_t crc;
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26 crc = 0xffffffff;
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28 while (len--) {
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29 c = *p++;
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30 crc = ngx_crc32_table_short[(crc ^ (c & 0xf)) & 0xf] ^ (crc >> 4);
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31 crc = ngx_crc32_table_short[(crc ^ (c >> 4)) & 0xf] ^ (crc >> 4);
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32 }
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34 return crc ^ 0xffffffff;
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35 }
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38 static ngx_inline uint32_t
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39 ngx_crc32_long(u_char *p, size_t len)
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40 {
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41 uint32_t crc;
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43 crc = 0xffffffff;
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45 while (len--) {
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46 crc = ngx_crc32_table256[(crc ^ *p++) & 0xff] ^ (crc >> 8);
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47 }
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49 return crc ^ 0xffffffff;
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50 }
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53 #define ngx_crc32_init(crc) \
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54 crc = 0xffffffff
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57 static ngx_inline void
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58 ngx_crc32_update(uint32_t *crc, u_char *p, size_t len)
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59 {
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60 uint32_t c;
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62 c = *crc;
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64 while (len--) {
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65 c = ngx_crc32_table256[(c ^ *p++) & 0xff] ^ (c >> 8);
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66 }
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68 *crc = c;
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69 }
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72 #define ngx_crc32_final(crc) \
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73 crc ^= 0xffffffff
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76 ngx_int_t ngx_crc32_table_init(void);
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79 #endif /* _NGX_CRC32_H_INCLUDED_ */