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 * 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 38 /* 39 * Copyright 2010 Nexenta Systems, Inc. All rights reserved. 40 * Use is subject to license terms. 41 */ 42 43 #include "lint.h" 44 #include <wchar.h> 45 #include "_ctype.h" 46 #include "runetype.h" 47 48 #undef wcwidth 49 50 int 51 wcwidth(wchar_t wc) 52 { 53 unsigned int x; 54 55 if (wc == 0) 56 return (0); 57 58 x = ((wc < 0 || wc >= _CACHED_RUNES) ? ___runetype(wc) : 59 _CurrentRuneLocale->__runetype[wc]) & (_CTYPE_SWM|_CTYPE_R); 60 61 if ((x & _CTYPE_SWM) != 0) 62 return ((x & _CTYPE_SWM) >> _CTYPE_SWS); 63 return ((x & _CTYPE_R) != 0 ? 1 : -1); 64 } 65 66 #pragma weak _scrwidth = scrwidth 67 68 /* 69 * This is a Solaris extension. It never returns a negative width, even for 70 * non-printable characters. It is used internally by the printf 71 * implementation for %ws. 72 */ 73 int 74 scrwidth(wchar_t wc) 75 { 76 int v = wcwidth(wc); 77 return (v > 0 ? v : 0); 78 } 79