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