ref: d8d47f14b5ed8f6d3f892761ed86c6ce2075c337
dir: /sys/src/libc/port/memmove.c/
#include <u.h> #include <libc.h> void* memmove(void *a1, void *a2, ulong n) { char *s1, *s2; if((long)n < 0) abort(); s1 = a1; s2 = a2; if((s2 < s1) && (s2+n > s1)) goto back; while(n > 0) { *s1++ = *s2++; n--; } return a1; back: s1 += n; s2 += n; while(n > 0) { *--s1 = *--s2; n--; } return a1; } void* memcpy(void *a1, void *a2, ulong n) { return memmove(a1, a2, n); }