ref: ee4b58548e0df76a402c09ffcf0964d0e6cddbfa
dir: /libc/utfecpy.c/
#include <u.h> #include <libc.h> char* utfecpy(char *to, char *e, char *from) { char *end; if(to >= e) return to; end = memccpy(to, from, '\0', e - to); if(end == nil){ end = e-1; while(end>to && (*--end&0xC0)==0x80) ; *end = '\0'; }else{ end--; } return end; }