34 lines
373 B
C
34 lines
373 B
C
#include <u.h>
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#include <libc.h>
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void*
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memmove(void *a1, void *a2, usize n)
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{
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char *s1, *s2;
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s1 = a1;
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s2 = a2;
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if((s2 < s1) && (s2+n > s1))
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goto back;
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while(n > 0) {
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*s1++ = *s2++;
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n--;
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}
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return a1;
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back:
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s1 += n;
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s2 += n;
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while(n > 0) {
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*--s1 = *--s2;
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n--;
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}
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return a1;
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}
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void*
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memcpy(void *a1, void *a2, usize n)
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{
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return memmove(a1, a2, n);
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}
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