code: 9ferno

ref: f86de033419f1c8733da7d05a9b824bcdb6c3aac
dir: /lib9/utfecpy.c/

View raw version 
#include "lib9.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;
}