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a4d08ca331
Compiling for the arm platform with -Werror for the 9196caf commit causes it to fail. This commit addresses this issue
45 lines
1.6 KiB
C
45 lines
1.6 KiB
C
/* jhash.h: Jenkins hash support.
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*
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* Copyright (C) 1996 Bob Jenkins (bob_jenkins@burtleburtle.net)
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*
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* http://burtleburtle.net/bob/hash/
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*
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* These are the credits from Bob's sources:
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*
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* lookup2.c, by Bob Jenkins, December 1996, Public Domain.
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* hash(), hash2(), hash3, and mix() are externally useful functions.
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* Routines to test the hash are included if SELF_TEST is defined.
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* You can use this free for any purpose. It has no warranty.
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*
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* Copyright (C) 2003 David S. Miller (davem@redhat.com)
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*
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* I've modified Bob's hash to be useful in the Linux kernel, and
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* any bugs present are surely my fault. -DaveM
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*/
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#ifndef _QUAGGA_JHASH_H
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#define _QUAGGA_JHASH_H
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/* The most generic version, hashes an arbitrary sequence
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* of bytes. No alignment or length assumptions are made about
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* the input key.
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*/
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extern u_int32_t jhash(const void *key, u_int32_t length, u_int32_t initval);
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/* A special optimized version that handles 1 or more of u_int32_ts.
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* The length parameter here is the number of u_int32_ts in the key.
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*/
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extern u_int32_t jhash2(const u_int32_t *k, u_int32_t length, u_int32_t initval);
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/* A special ultra-optimized versions that knows they are hashing exactly
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* 3, 2 or 1 word(s).
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*
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* NOTE: In partilar the "c += length; __jhash_mix(a,b,c);" normally
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* done at the end is not done here.
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*/
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extern u_int32_t jhash_3words(u_int32_t a, u_int32_t b, u_int32_t c, u_int32_t initval);
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extern u_int32_t jhash_2words(u_int32_t a, u_int32_t b, u_int32_t initval);
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extern u_int32_t jhash_1word(u_int32_t a, u_int32_t initval);
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#endif /* _QUAGGA_JHASH_H */
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