1275970Scy/* $Header: /p/tcsh/cvsroot/tcsh/tc.nls.c,v 3.23 2010/02/12 22:17:20 christos Exp $ */ 2275970Scy/* 3275970Scy * tc.nls.c: NLS handling 4275970Scy */ 5275970Scy/*- 6275970Scy * Copyright (c) 1980, 1991 The Regents of the University of California. 7275970Scy * All rights reserved. 8275970Scy * 9275970Scy * Redistribution and use in source and binary forms, with or without 10275970Scy * modification, are permitted provided that the following conditions 11275970Scy * are met: 12275970Scy * 1. Redistributions of source code must retain the above copyright 13275970Scy * notice, this list of conditions and the following disclaimer. 14275970Scy * 2. Redistributions in binary form must reproduce the above copyright 15275970Scy * notice, this list of conditions and the following disclaimer in the 16275970Scy * documentation and/or other materials provided with the distribution. 17275970Scy * 3. Neither the name of the University nor the names of its contributors 18275970Scy * may be used to endorse or promote products derived from this software 19275970Scy * without specific prior written permission. 20275970Scy * 21275970Scy * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22275970Scy * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23275970Scy * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24275970Scy * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25275970Scy * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26275970Scy * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27275970Scy * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28275970Scy * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29275970Scy * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30275970Scy * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31275970Scy * SUCH DAMAGE. 32275970Scy */ 33275970Scy#include "sh.h" 34275970Scy 35275970ScyRCSID("$tcsh: tc.nls.c,v 3.23 2010/02/12 22:17:20 christos Exp $") 36294569Sdelphij 37275970Scy 38275970Scy#ifdef WIDE_STRINGS 39275970Scy# ifdef HAVE_WCWIDTH 40275970Scy# ifdef UTF16_STRINGS 41275970Scyint 42275970Scyxwcwidth (wint_t wchar) 43275970Scy{ 44275970Scy wchar_t ws[2]; 45275970Scy 46275970Scy if (wchar <= 0xffff) 47275970Scy return wcwidth ((wchar_t) wchar); 48275970Scy /* UTF-16 systems can't handle these values directly in calls to wcwidth. 49275970Scy However, they can handle them as surrogate pairs in calls to wcswidth. 50275970Scy What we do here is to convert UTF-32 values >= 0x10000 into surrogate 51275970Scy pairs and compute the width by calling wcswidth. */ 52275970Scy wchar -= 0x10000; 53275970Scy ws[0] = 0xd800 | (wchar >> 10); 54275970Scy ws[1] = 0xdc00 | (wchar & 0x3ff); 55275970Scy return wcswidth (ws, 2); 56275970Scy} 57275970Scy# else 58275970Scy#define xwcwidth wcwidth 59275970Scy# endif /* !UTF16_STRINGS */ 60275970Scy# endif /* HAVE_WCWIDTH */ 61275970Scy 62275970Scyint 63275970ScyNLSWidth(Char c) 64275970Scy{ 65275970Scy# ifdef HAVE_WCWIDTH 66275970Scy int l; 67275970Scy if (c & INVALID_BYTE) 68275970Scy return 1; 69275970Scy l = xwcwidth((wchar_t) c); 70275970Scy return l >= 0 ? l : 0; 71275970Scy# else 72275970Scy return iswprint(c) != 0; 73275970Scy# endif 74275970Scy} 75275970Scy 76275970Scyint 77275970ScyNLSStringWidth(const Char *s) 78275970Scy{ 79275970Scy int w = 0, l; 80275970Scy Char c; 81275970Scy 82275970Scy while (*s) { 83275970Scy c = *s++; 84275970Scy#ifdef HAVE_WCWIDTH 85275970Scy if ((l = xwcwidth((wchar_t) c)) < 0) 86275970Scy l = 2; 87275970Scy#else 88275970Scy l = iswprint(c) != 0; 89275970Scy#endif 90275970Scy w += l; 91275970Scy } 92275970Scy return w; 93275970Scy} 94275970Scy#endif 95275970Scy 96294569SdelphijChar * 97275970ScyNLSChangeCase(const Char *p, int mode) 98275970Scy{ 99275970Scy Char c, *n, c2 = 0; 100275970Scy const Char *op = p; 101275970Scy 102275970Scy for (; (c = *p) != 0; p++) { 103275970Scy if (mode == 0 && Islower(c)) { 104275970Scy c2 = Toupper(c); 105294569Sdelphij break; 106294569Sdelphij } else if (mode && Isupper(c)) { 107294569Sdelphij c2 = Tolower(c); 108294569Sdelphij break; 109294569Sdelphij } 110294569Sdelphij } 111294569Sdelphij if (!*p) 112294569Sdelphij return 0; 113294569Sdelphij n = Strsave(op); 114275970Scy n[p - op] = c2; 115275970Scy return n; 116275970Scy} 117275970Scy 118275970Scyint 119275970ScyNLSClassify(Char c, int nocomb) 120275970Scy{ 121275970Scy int w; 122275970Scy if (c & INVALID_BYTE) 123275970Scy return NLSCLASS_ILLEGAL; 124275970Scy w = NLSWidth(c); 125275970Scy if ((w > 0 && !(Iscntrl(c) && (c & CHAR) < 0x100)) || (Isprint(c) && !nocomb)) 126275970Scy return w; 127275970Scy if (Iscntrl(c) && (c & CHAR) < 0x100) { 128275970Scy if (c == '\n') 129275970Scy return NLSCLASS_NL; 130275970Scy if (c == '\t') 131275970Scy return NLSCLASS_TAB; 132275970Scy return NLSCLASS_CTRL; 133275970Scy } 134275970Scy#ifdef WIDE_STRINGS 135275970Scy if (c >= 0x1000000) 136275970Scy return NLSCLASS_ILLEGAL4; 137275970Scy if (c >= 0x10000) 138275970Scy return NLSCLASS_ILLEGAL3; 139275970Scy#endif 140275970Scy if (c >= 0x100) 141275970Scy return NLSCLASS_ILLEGAL2; 142275970Scy return NLSCLASS_ILLEGAL; 143275970Scy} 144275970Scy