2 * tc.nls.c: NLS handling
5 * Copyright (c) 1980, 1991 The Regents of the University of California.
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38 xwcwidth (wint_t wchar)
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. */
49 ws[0] = 0xd800 | (wchar >> 10);
50 ws[1] = 0xdc00 | (wchar & 0x3ff);
51 return wcswidth (ws, 2);
54 #define xwcwidth wcwidth
55 # endif /* !UTF16_STRINGS */
56 # endif /* HAVE_WCWIDTH */
64 if ((c & INVALID_BYTE) == INVALID_BYTE) /* c >= INVALID_BYTE */
69 l = xwcwidth((wchar_t) c);
70 return l >= 0 ? l : 0;
72 return iswprint(c) != 0;
77 NLSStringWidth(const Char *s)
85 if ((l = xwcwidth((wchar_t) c)) < 0)
97 NLSChangeCase(const Char *p, int mode)
102 for (; (c = *p) != 0; p++) {
103 if (mode == 0 && Islower(c)) {
106 } else if (mode && Isupper(c)) {
119 NLSClassify(Char c, int nocomb, int drawPrompt)
122 #ifndef SHORT_STRINGS
123 if ((c & 0x80) != 0) /* c >= 0x80 */
124 return NLSCLASS_ILLEGAL;
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 */
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;
139 if (c >= 0x10000) /* U+10000 = F0 90 80 80 */
140 return NLSCLASS_ILLEGAL2;
142 if (Iscntrl(c) && (c & CHAR) < 0x100) {
147 return NLSCLASS_CTRL;
150 if (drawPrompt) { /* draw prompt */
156 if ((w > 0 && !(Iscntrl(c) && (c & CHAR) < 0x100)) || (Isprint(c) && !nocomb))
158 return NLSCLASS_ILLEGAL;