forked from mirrors/linux
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
27 lines
888 B
C
27 lines
888 B
C
/*
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* crc32.h
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* See linux/lib/crc32.c for license and changes
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*/
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#ifndef _LINUX_CRC32_H
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#define _LINUX_CRC32_H
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#include <linux/types.h>
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extern u32 crc32_le(u32 crc, unsigned char const *p, size_t len);
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extern u32 crc32_be(u32 crc, unsigned char const *p, size_t len);
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extern u32 bitreverse(u32 in);
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#define crc32(seed, data, length) crc32_le(seed, (unsigned char const *)data, length)
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/*
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* Helpers for hash table generation of ethernet nics:
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*
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* Ethernet sends the least significant bit of a byte first, thus crc32_le
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* is used. The output of crc32_le is bit reversed [most significant bit
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* is in bit nr 0], thus it must be reversed before use. Except for
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* nics that bit swap the result internally...
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*/
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#define ether_crc(length, data) bitreverse(crc32_le(~0, data, length))
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#define ether_crc_le(length, data) crc32_le(~0, data, length)
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#endif /* _LINUX_CRC32_H */
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