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TLINDEN
2013-10-28 22:50:05 +01:00
parent 92c0dcbebf
commit 2d7babae35
113 changed files with 61619 additions and 4 deletions
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25
libpcp/jenhash.h Normal file
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#ifndef _HAVE_JENHASH_H
#define _HAVE_JENHASH_H
// Bob Jenkins 32bit hash function
// via: http://eternallyconfuzzled.com/tuts/algorithms/jsw_tut_hashing.aspx
#define jen_mix(a,b,c) \
{ \
a -= b; a -= c; a ^= ( c >> 13 ); \
b -= c; b -= a; b ^= ( a << 8 ); \
c -= a; c -= b; c ^= ( b >> 13 ); \
a -= b; a -= c; a ^= ( c >> 12 ); \
b -= c; b -= a; b ^= ( a << 16 ); \
c -= a; c -= b; c ^= ( b >> 5 ); \
a -= b; a -= c; a ^= ( c >> 3 ); \
b -= c; b -= a; b ^= ( a << 10 ); \
c -= a; c -= b; c ^= ( b >> 15 ); \
}
#define JEN_PSALT 0xD9A03
#define JEN_SSALT 0xC503B
unsigned jen_hash ( unsigned char *k, unsigned length, unsigned initval );
#endif // _HAVE_JENHASH_H