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9385eb3d A |
1 | /* |
2 | * Copyright (c) 1989, 1993 | |
e9ce8d39 | 3 | * The Regents of the University of California. All rights reserved. |
9385eb3d A |
4 | * (c) UNIX System Laboratories, Inc. |
5 | * All or some portions of this file are derived from material licensed | |
6 | * to the University of California by American Telephone and Telegraph | |
7 | * Co. or Unix System Laboratories, Inc. and are reproduced herein with | |
8 | * the permission of UNIX System Laboratories, Inc. | |
e9ce8d39 A |
9 | * |
10 | * This code is derived from software contributed to Berkeley by | |
5b2abdfb | 11 | * Paul Borman at Krystal Technologies. |
e9ce8d39 A |
12 | * |
13 | * Redistribution and use in source and binary forms, with or without | |
14 | * modification, are permitted provided that the following conditions | |
15 | * are met: | |
16 | * 1. Redistributions of source code must retain the above copyright | |
17 | * notice, this list of conditions and the following disclaimer. | |
18 | * 2. Redistributions in binary form must reproduce the above copyright | |
19 | * notice, this list of conditions and the following disclaimer in the | |
20 | * documentation and/or other materials provided with the distribution. | |
e9ce8d39 A |
21 | * 4. Neither the name of the University nor the names of its contributors |
22 | * may be used to endorse or promote products derived from this software | |
23 | * without specific prior written permission. | |
24 | * | |
25 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
26 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
27 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
28 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
30 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
31 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
32 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
33 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
34 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
35 | * SUCH DAMAGE. | |
36 | */ | |
37 | ||
9385eb3d | 38 | #include <sys/cdefs.h> |
1f2f436a | 39 | __FBSDID("$FreeBSD: src/lib/libc/string/wcswidth.c,v 1.7 2007/01/09 00:28:12 imp Exp $"); |
e9ce8d39 | 40 | |
9385eb3d | 41 | #include <wchar.h> |
5b2abdfb | 42 | |
9385eb3d A |
43 | int |
44 | wcswidth(const wchar_t *pwcs, size_t n) | |
45 | { | |
46 | wchar_t wc; | |
47 | int len, l; | |
5b2abdfb | 48 | |
9385eb3d A |
49 | len = 0; |
50 | while (n-- > 0 && (wc = *pwcs++) != L'\0') { | |
51 | if ((l = wcwidth(wc)) < 0) | |
52 | return (-1); | |
53 | len += l; | |
5b2abdfb | 54 | } |
9385eb3d | 55 | return (len); |
e9ce8d39 | 56 | } |
9385eb3d | 57 |