39 lines
689 B
C
39 lines
689 B
C
/*
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* vim:ts=8:sw=3:sts=8:noexpandtab:cino=>5n-3f0^-2{2
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdio.h>
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#include <math.h>
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#include "Eet.h"
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#include "Eet_private.h"
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int
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_eet_hash_gen(const char *key, int hash_size)
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{
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int hash_num = 0;
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int value, i;
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int mask;
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unsigned char *ptr;
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/* no string - index 0 */
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if (!key) return 0;
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/* calc hash num */
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for (i = 0, ptr = (unsigned char *)key, value = (int)(*ptr);
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value;
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ptr++, i++, value = (int)(*ptr))
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hash_num ^= (value | (value << 8)) >> (i & 0x7);
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/* mask it */
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mask = (1 << hash_size) - 1;
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hash_num &= mask;
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/* return it */
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return hash_num;
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}
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