ref: 2dea7c2f8e55b4de0c79448c3ce03351a8f75e3b dir: /sys/src/ape/lib/ap/gen/memset.c/
#include <string.h> void* memset(void *ap, int c, size_t n) { char *p; p = ap; while(n > 0) { *p++ = c; n--; } return ap; }