Mercurial > hg > nginx
comparison src/core/ngx_crc32.h @ 1694:8c696afe46b3
rename ngx_crc32_init() to ngx_crc32_table_init()
ngx_crc32_init(), ngx_crc32_update(), ngx_crc32_final()
author | Igor Sysoev <igor@sysoev.ru> |
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date | Fri, 07 Dec 2007 20:19:41 +0000 |
parents | 45df22906c12 |
children | d6afb8723155 |
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1693:f4eb04fd8579 | 1694:8c696afe46b3 |
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47 | 47 |
48 return crc ^ 0xffffffff; | 48 return crc ^ 0xffffffff; |
49 } | 49 } |
50 | 50 |
51 | 51 |
52 ngx_int_t ngx_crc32_init(void); | 52 #define ngx_crc32_init(crc) \ |
53 crc = 0xffffffff | |
54 | |
55 | |
56 static void | |
57 ngx_crc32_update(uint32_t *crc, u_char *p, size_t len) | |
58 { | |
59 uint32_t c; | |
60 | |
61 c = *crc; | |
62 | |
63 while (len--) { | |
64 c = ngx_crc32_table256[(c ^ *p++) & 0xff] ^ (c >> 8); | |
65 } | |
66 | |
67 *crc = c; | |
68 } | |
69 | |
70 | |
71 #define ngx_crc32_final(crc) \ | |
72 crc ^= 0xffffffff | |
73 | |
74 | |
75 ngx_int_t ngx_crc32_table_init(void); | |
53 | 76 |
54 | 77 |
55 #endif /* _NGX_CRC32_H_INCLUDED_ */ | 78 #endif /* _NGX_CRC32_H_INCLUDED_ */ |