1/* $Header: /p/tcsh/cvsroot/tcsh/tc.nls.c,v 3.27 2016/07/17 15:02:44 christos Exp $ */ 2/* 3 * tc.nls.c: NLS handling 4 */ 5/*- 6 * Copyright (c) 1980, 1991 The Regents of the University of California. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33#include "sh.h" 34 35RCSID("$tcsh: tc.nls.c,v 3.27 2016/07/17 15:02:44 christos Exp $") 36 37 38#ifdef WIDE_STRINGS 39# ifdef HAVE_WCWIDTH 40# ifdef UTF16_STRINGS 41int 42xwcwidth (wint_t wchar) 43{ 44 wchar_t ws[2]; 45 46 if (wchar <= 0xffff) 47 return wcwidth ((wchar_t) wchar); 48 /* UTF-16 systems can't handle these values directly in calls to wcwidth. 49 However, they can handle them as surrogate pairs in calls to wcswidth. 50 What we do here is to convert UTF-32 values >= 0x10000 into surrogate 51 pairs and compute the width by calling wcswidth. */ 52 wchar -= 0x10000; 53 ws[0] = 0xd800 | (wchar >> 10); 54 ws[1] = 0xdc00 | (wchar & 0x3ff); 55 return wcswidth (ws, 2); 56} 57# else 58#define xwcwidth wcwidth 59# endif /* !UTF16_STRINGS */ 60# endif /* HAVE_WCWIDTH */ 61 62int 63NLSWidth(Char c) 64{ 65# ifdef HAVE_WCWIDTH 66 int l; 67#if INVALID_BYTE != 0 68 if ((c & INVALID_BYTE) == INVALID_BYTE) /* c >= INVALID_BYTE */ 69#else 70 if (c & INVALID_BYTE) 71#endif 72 return 1; 73 l = xwcwidth((wchar_t) c); 74 return l >= 0 ? l : 0; 75# else 76 return iswprint(c) != 0; 77# endif 78} 79 80int 81NLSStringWidth(const Char *s) 82{ 83 int w = 0, l; 84 Char c; 85 86 while (*s) { 87 c = *s++; 88#ifdef HAVE_WCWIDTH 89 if ((l = xwcwidth((wchar_t) c)) < 0) 90 l = 2; 91#else 92 l = iswprint(c) != 0; 93#endif 94 w += l; 95 } 96 return w; 97} 98#endif 99 100Char * 101NLSChangeCase(const Char *p, int mode) 102{ 103 Char c, *n, c2 = 0; 104 const Char *op = p; 105 106 for (; (c = *p) != 0; p++) { 107 if (mode == 0 && Islower(c)) { 108 c2 = Toupper(c); 109 break; 110 } else if (mode && Isupper(c)) { 111 c2 = Tolower(c); 112 break; 113 } 114 } 115 if (!*p) 116 return 0; 117 n = Strsave(op); 118 n[p - op] = c2; 119 return n; 120} 121 122int 123NLSClassify(Char c, int nocomb, int drawPrompt) 124{ 125 int w; 126#ifndef SHORT_STRINGS 127 if ((c & 0x80) != 0) /* c >= 0x80 */ 128 return NLSCLASS_ILLEGAL; 129#endif 130 if (!drawPrompt) { /* draw command-line */ 131#if INVALID_BYTE != 0 132 if ((c & INVALID_BYTE) == INVALID_BYTE) /* c >= INVALID_BYTE */ 133 return NLSCLASS_ILLEGAL; 134 if ((c & INVALID_BYTE) == QUOTE && (c & 0x80) == 0) /* c >= QUOTE */ 135 return 1; 136 if (c >= 0x10000000) /* U+10000000 = FC 90 80 80 80 80 */ 137 return NLSCLASS_ILLEGAL5; 138 if (c >= 0x1000000) /* U+1000000 = F9 80 80 80 80 */ 139 return NLSCLASS_ILLEGAL4; 140 if (c >= 0x100000) /* U+100000 = F4 80 80 80 */ 141 return NLSCLASS_ILLEGAL3; 142#endif 143 if (c >= 0x10000) /* U+10000 = F0 90 80 80 */ 144 return NLSCLASS_ILLEGAL2; 145 } 146 if (Iscntrl(c) && (c & CHAR) < 0x100) { 147 if (c == '\n') 148 return NLSCLASS_NL; 149 if (c == '\t') 150 return NLSCLASS_TAB; 151 return NLSCLASS_CTRL; 152 } 153 w = NLSWidth(c); 154 if (drawPrompt) { /* draw prompt */ 155 if (w > 0) 156 return w; 157 if (w == 0) 158 return 1; 159 } 160 if ((w > 0 && !(Iscntrl(c) && (c & CHAR) < 0x100)) || (Isprint(c) && !nocomb)) 161 return w; 162 return NLSCLASS_ILLEGAL; 163} 164