1 /*
2 * Copyright 2013 Garrett D'Amore <garrett@damore.org>
3 * Copyright (c) 1989, 1993
4 * The Regents of the University of California. All rights reserved.
5 * (c) UNIX System Laboratories, Inc.
6 * All or some portions of this file are derived from material licensed
7 * to the University of California by American Telephone and Telegraph
8 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
9 * the permission of UNIX System Laboratories, Inc.
10 *
11 * This code is derived from software contributed to Berkeley by
12 * Paul Borman at Krystal Technologies.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
16 * are met:
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 */
38
39 /*
40 * Copyright 2010 Nexenta Systems, Inc. All rights reserved.
41 * Use is subject to license terms.
42 */
43
44 #include "lint.h"
45 #include <wchar.h>
46 #include "_ctype.h"
47 #include "runetype.h"
48 #include "localeimpl.h"
49
50 #undef wcwidth
51
52 int
wcwidth_l(wchar_t wc,locale_t loc)53 wcwidth_l(wchar_t wc, locale_t loc)
54 {
55 unsigned int x;
56 const _RuneLocale *rl = loc->runelocale;
57
58 if (wc == 0)
59 return (0);
60
61 x = ((wc < 0 || wc >= _CACHED_RUNES) ? __runetype(rl, wc) :
62 rl->__runetype[wc]) & (_CTYPE_SWM|_CTYPE_R);
63
64 if ((x & _CTYPE_SWM) != 0)
65 return ((x & _CTYPE_SWM) >> _CTYPE_SWS);
66 return ((x & _CTYPE_R) != 0 ? 1 : -1);
67 }
68
69 int
wcwidth(wchar_t wc)70 wcwidth(wchar_t wc)
71 {
72 return (wcwidth_l(wc, uselocale(NULL)));
73 }
74
75 #pragma weak _scrwidth = scrwidth
76
77 /*
78 * This is a Solaris extension. It never returns a negative width, even for
79 * non-printable characters. It is used internally by the printf
80 * implementation for %ws.
81 */
82 int
scrwidth(wchar_t wc)83 scrwidth(wchar_t wc)
84 {
85 int v = wcwidth(wc);
86 return (v > 0 ? v : 0);
87 }
88