| | 1 | /* |
| | 2 | * Copyright (c) 1989, 1993 |
| | 3 | * The Regents of the University of California. All rights reserved. |
| | 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. |
| | 9 | * |
| | 10 | * This code is derived from software contributed to Berkeley by |
| | 11 | * Paul Borman at Krystal Technologies. |
| | 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. |
| | 21 | * 3. All advertising materials mentioning features or use of this software |
| | 22 | * must display the following acknowledgement: |
| | 23 | * This product includes software developed by the University of |
| | 24 | * California, Berkeley and its contributors. |
| | 25 | * 4. Neither the name of the University nor the names of its contributors |
| | 26 | * may be used to endorse or promote products derived from this software |
| | 27 | * without specific prior written permission. |
| | 28 | * |
| | 29 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| | 30 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| | 31 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| | 32 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| | 33 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| | 34 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| | 35 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| | 36 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| | 37 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| | 38 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| | 39 | * SUCH DAMAGE. |
| | 40 | */ |
| | 41 | |
| | 42 | #include <sys/cdefs.h> |
| | 43 | __FBSDID("$FreeBSD: src/lib/libc/locale/wcwidth.c,v 1.5 2002/08/19 20:32:27 ache Exp $"); |
| | 44 | |
| | 45 | #include <wchar.h> |
| | 46 | #include <wctype.h> |
| | 47 | |
| | 48 | #define _CTYPE_SWM 0xe0000000L /* Mask to get screen width data */ |
| | 49 | #define _CTYPE_SWS 30 /* Bits to shift to get width */ |
| | 50 | |
| | 51 | int |
| | 52 | wcwidth(wchar_t wc) |
| | 53 | { |
| | 54 | int width; |
| | 55 | |
| | 56 | if (wc == L'\0') |
| | 57 | return (0); |
| | 58 | |
| | 59 | width = __maskrune(wc, _CTYPE_SWM); |
| | 60 | |
| | 61 | /* 0 is autowidth (default) */ |
| | 62 | return (width ? (int)((unsigned)width >> _CTYPE_SWS) |
| | 63 | : (iswprint(wc) ? 1 : -1)); |
| | 64 | } |
| | 65 | |
projects / apple / libc.git / blame_incremental