1 /* $Header: /p/tcsh/cvsroot/tcsh/tc.nls.c,v 3.27 2016/07/17 15:02:44 christos Exp $ */
3 * tc.nls.c: NLS handling
6 * Copyright (c) 1980, 1991 The Regents of the University of California.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
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.
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
35 RCSID("$tcsh: tc.nls.c,v 3.27 2016/07/17 15:02:44 christos Exp $")
42 xwcwidth (wint_t wchar)
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. */
53 ws[0] = 0xd800 | (wchar >> 10);
54 ws[1] = 0xdc00 | (wchar & 0x3ff);
55 return wcswidth (ws, 2);
58 #define xwcwidth wcwidth
59 # endif /* !UTF16_STRINGS */
60 # endif /* HAVE_WCWIDTH */
68 if ((c & INVALID_BYTE) == INVALID_BYTE) /* c >= INVALID_BYTE */
73 l = xwcwidth((wchar_t) c);
74 return l >= 0 ? l : 0;
76 return iswprint(c) != 0;
81 NLSStringWidth(const Char *s)
89 if ((l = xwcwidth((wchar_t) c)) < 0)
101 NLSChangeCase(const Char *p, int mode)
106 for (; (c = *p) != 0; p++) {
107 if (mode == 0 && Islower(c)) {
110 } else if (mode && Isupper(c)) {
123 NLSClassify(Char c, int nocomb, int drawPrompt)
126 #ifndef SHORT_STRINGS
127 if ((c & 0x80) != 0) /* c >= 0x80 */
128 return NLSCLASS_ILLEGAL;
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 */
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;
143 if (c >= 0x10000) /* U+10000 = F0 90 80 80 */
144 return NLSCLASS_ILLEGAL2;
146 if (Iscntrl(c) && (c & CHAR) < 0x100) {
151 return NLSCLASS_CTRL;
154 if (drawPrompt) { /* draw prompt */
160 if ((w > 0 && !(Iscntrl(c) && (c & CHAR) < 0x100)) || (Isprint(c) && !nocomb))
162 return NLSCLASS_ILLEGAL;