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
19 char*
utfecpy(char * to,char * e,const char * from)20 utfecpy(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