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 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 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 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 * 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 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 #ifdef SHORT_STRINGS 140 if (c >= 0x10000) /* U+10000 = F0 90 80 80 */ 141 return NLSCLASS_ILLEGAL2; 142 #endif 143 } 144 if (Iscntrl(c) && (c & CHAR) < 0x100) { 145 if (c == '\n') 146 return NLSCLASS_NL; 147 if (c == '\t') 148 return NLSCLASS_TAB; 149 return NLSCLASS_CTRL; 150 } 151 w = NLSWidth(c); 152 if (drawPrompt) { /* draw prompt */ 153 if (w > 0) 154 return w; 155 if (w == 0) 156 return 1; 157 } 158 if ((w > 0 && !(Iscntrl(c) && (c & CHAR) < 0x100)) || (Isprint(c) && !nocomb)) 159 return w; 160 return NLSCLASS_ILLEGAL; 161 } 162