1/*
2 * The authors of this software are Rob Pike and Ken Thompson.
3 *              Copyright (c) 2002 by Lucent Technologies.
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose without fee is hereby granted, provided that this entire notice
6 * is included in all copies of any software which is or includes a copy
7 * or modification of this software and in all copies of the supporting
8 * documentation for such software.
9 * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
10 * WARRANTY.  IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES MAKE ANY
11 * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
12 * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
13 */
14#include <stdarg.h>
15#include <string.h>
16#include "utf.h"
17#include "utfdef.h"
18
19char*
20utfecpy(char *to, char *e, const char *from)
21{
22	char *end;
23
24	if(to >= e)
25		return to;
26	end = (char*)memccpy(to, from, '\0', e - to);
27	if(end == nil){
28		end = e-1;
29		while(end>to && (*--end&0xC0)==0x80)
30			;
31		*end = '\0';
32	}else{
33		end--;
34	}
35	return end;
36}
37