Mercurial > hg > nginx
view src/core/ngx_crc.h @ 395:f8f0f1834266
nginx-0.0.7-2004-07-16-21:11:43 import
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Fri, 16 Jul 2004 17:11:43 +0000 |
parents | 0b67be7d4489 |
children | da8c5707af39 |
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#ifndef _NGX_CRC_H_INCLUDED_ #define _NGX_CRC_H_INCLUDED_ /* 32-bit crc16 */ ngx_inline static uint32_t ngx_crc(char *data, size_t len) { uint32_t sum; for (sum = 0; len; len--) { /* * gcc 2.95.2 x86 and icc 7.1.006 compile that operator * into the single rol opcode. * msvc 6.0sp2 compiles it into four opcodes. */ sum = sum >> 1 | sum << 31; sum += *data++; } return sum; } #endif /* _NGX_CRC_H_INCLUDED_ */