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#include <string.h>
void*
memmove(void *a1, const void *a2, size_t n)
{
char *s1, *s2;
extern void abort(void);
if((long)n < 0)
abort();
if(a1 > a2)
goto back;
s1 = a1;
s2 = a2;
while(n > 0) {
*s1++ = *s2++;
n--;
}
return a1;
back:
s1 = (char*)a1 + n;
s2 = (char*)a2 + n;
while(n > 0) {
*--s1 = *--s2;
n--;
}
return a1;
}
void*
memcpy(void *a1, const void *a2, size_t n)
{
return memmove(a1, a2, n);
}
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