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comparison src/core/ngx_crc.h @ 248:acd2ec3541cb NGINX_0_4_9

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nginx 0.4.9 *) Feature: the "set" parameter in the "include" SSI command. *) Feature: the ngx_http_perl_module now tests the nginx.pm module version.
author Igor Sysoev <http://sysoev.ru>
date Fri, 13 Oct 2006 00:00:00 +0400
parents 74b1868dd3cd
children fbf2b2f66c9f
comparison
equal deleted inserted replaced
247:fcca101509a4 248:acd2ec3541cb
8 #define _NGX_CRC_H_INCLUDED_ 8 #define _NGX_CRC_H_INCLUDED_
9 9
10 10
11 /* 32-bit crc16 */ 11 /* 32-bit crc16 */
12 12
13 static ngx_inline uint32_t ngx_crc(char *data, size_t len) 13 static ngx_inline uint32_t
14 ngx_crc(char *data, size_t len)
14 { 15 {
15 uint32_t sum; 16 uint32_t sum;
16 17
17 for (sum = 0; len; len--) { 18 for (sum = 0; len; len--) {
18 19
19 /* 20 /*
20 * gcc 2.95.2 x86 and icc 7.1.006 compile that operator 21 * gcc 2.95.2 x86 and icc 7.1.006 compile
21 * into the single "rol" opcode. 22 * that operator into the single "rol" opcode,
22 * msvc 6.0sp2 compiles it into four opcodes. 23 * msvc 6.0sp2 compiles it into four opcodes.
23 */ 24 */
24 sum = sum >> 1 | sum << 31; 25 sum = sum >> 1 | sum << 31;
25 26
26 sum += *data++; 27 sum += *data++;