diff options
author | Igor Sysoev <igor@sysoev.ru> | 2006-10-18 23:00:21 +0400 |
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committer | Igor Sysoev <igor@sysoev.ru> | 2006-10-18 23:00:21 +0400 |
commit | 5864fc0fcc3743bd91577cb6d6f1dcadb150459c (patch) | |
tree | c5e7d3ea9f449246aef8944130b7041512e3a2e7 /src/core/ngx_crc32.h | |
parent | 289e3caa4664402a06535445f3505ad5b9a85073 (diff) |
ngx_crc32()
Diffstat (limited to 'src/core/ngx_crc32.h')
-rw-r--r-- | src/core/ngx_crc32.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/core/ngx_crc32.h b/src/core/ngx_crc32.h new file mode 100644 index 000000000..22da02c53 --- /dev/null +++ b/src/core/ngx_crc32.h @@ -0,0 +1,33 @@ + +/* + * Copyright (C) Igor Sysoev + */ + + +#ifndef _NGX_CRC32_H_INCLUDED_ +#define _NGX_CRC32_H_INCLUDED_ + + +#include <ngx_config.h> +#include <ngx_core.h> + + +extern uint32_t ngx_crc32_table[]; + + +static ngx_inline uint32_t +ngx_crc32(u_char *p, size_t len) +{ + uint32_t crc; + + crc = 0xffffffff; + + while (len--) { + crc = ngx_crc32_table[(crc ^ *p++) & 0xff] ^ (crc >> 8); + } + + return crc ^ 0xffffffff; +} + + +#endif /* _NGX_CRC32_H_INCLUDED_ */ |