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30 lines
877 B
C
30 lines
877 B
C
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#ifndef X1764_H
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#define X1764_H
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#include <sys/types.h>
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// The x1764 hash is
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// $s = \sum_i a_i*17^i$ where $a_i$ is the $i$th 64-bit number (represented in little-endian format)
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// The final 32-bit result is the xor of the high- and low-order bits of s.
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// If any odd bytes numbers are left at the end, they are filled in at the low end.
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u_int32_t x1764_memory (const void *buf, int len);
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// Effect: Compute x1764 on the bytes of buf. Return the 32 bit answer.
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// For incrementally computing an x1764, use the following interfaces.
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struct x1764 {
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u_int64_t sum;
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u_int64_t input;
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int n_input_bytes;
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};
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void x1764_init(struct x1764 *l);
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// Effect: Initialize *l.
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inline void x1764_add (struct x1764 *l, const void *vbuf, int len);
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// Effect: Add more bytes to *l.
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u_int32_t x1764_finish (struct x1764 *l);
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// Effect: Return the final 32-bit result.
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#endif
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