Mercurial > hg > nginx-quic
diff src/core/ngx_crc32.h @ 790:f9a971440614
ngx_crc32()
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Wed, 18 Oct 2006 19:00:21 +0000 |
parents | |
children | 8d39da951bbd |
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new file mode 100644 --- /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_ */