ref: 65d683ba937ab076b094d50266cd159ce11c5387
dir: /libc/runestrecpy.c/
#include <u.h> #include <libc.h> Rune* runestrecpy(Rune *s1, Rune *es1, Rune *s2) { if(s1 >= es1) return s1; while(*s1++ = *s2++){ if(s1 == es1){ *--s1 = '\0'; break; } } return s1; }