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#include	<u.h>
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#include	<libc.h>
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void*
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memccpy(void *a1, void *a2, int c, ulong n)
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{
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	uchar *s1, *s2;
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	s1 = a1;
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	s2 = a2;
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	c &= 0xFF;
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	while(n > 0) {
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		if((*s1++ = *s2++) == c)
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			return s1;
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		n--;
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	}
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	return 0;
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}