16 lines
539 B
C
16 lines
539 B
C
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#ifndef COSMOPOLITAN_LIBC_STR_KNUTHMULTIPLICATIVEHASH_H_
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#define COSMOPOLITAN_LIBC_STR_KNUTHMULTIPLICATIVEHASH_H_
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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forceinline uint32_t KnuthMultiplicativeHash32(const void *buf, size_t size) {
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size_t i;
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uint32_t h;
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const uint32_t kPhiPrime = 0x9e3779b1;
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const unsigned char *p = (const unsigned char *)buf;
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for (h = i = 0; i < size; i++) h = (p[i] + h) * kPhiPrime;
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return h;
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}
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_STR_KNUTHMULTIPLICATIVEHASH_H_ */
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