ref: 45a3ec40329b2948edc3a4e94f1850ccd02f4f29
dir: /lib/c/src/memcpy.c/
#include <string.h> #undef memcpy void * memcpy(void * restrict dst, const void * restrict src, size_t n) { char *s1 = dst; const char *s2 = src; while (n-- > 0) *s1++ = *s2++; return dst; }