1 /* $OpenBSD: wcswidth.c,v 1.5 2015/09/12 16:23:14 guenther Exp $ */
2 /* $NetBSD: wcswidth.c,v 1.2 2001/01/03 14:29:37 lukem Exp $ */
3
4 /*-
5 * Copyright (c)1999 Citrus Project,
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * citrus Id: wcswidth.c,v 1.1 1999/12/29 21:47:45 tshiozak Exp
30 */
31
32 #include <wchar.h>
33
34 int
wcswidth(const wchar_t * s,size_t n)35 wcswidth(const wchar_t *s, size_t n)
36 {
37 int w, q;
38
39 w = 0;
40 while (n && *s) {
41 q = wcwidth(*s);
42 if (q == -1)
43 return (-1);
44 w += q;
45 s++;
46 n--;
47 }
48
49 return w;
50 }
51 DEF_WEAK(wcswidth);
52