git: 9front

ref: a21c8d0216dc5b89f12975f17c1c5e626aa46eb3
dir: /sys/src/libc/port/utfecpy.c/

View raw version 
#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;
		while(end>to && (*--end&0xC0)==0x80)
			;
		*end = '\0';
	}else{
		end--;
	}
	return end;
}