1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #include "lint.h" 28 #include "mtlib.h" 29 #include <sys/types.h> 30 #include <ctype.h> 31 #include <string.h> 32 #include <stdlib.h> 33 #include <euc.h> 34 #include <widec.h> 35 #include <wctype.h> 36 #include <limits.h> 37 #include <synch.h> 38 #include <thread.h> 39 #include <libintl.h> 40 #include "libc.h" 41 42 #include <locale.h> 43 #include <dlfcn.h> 44 #include "_loc_path.h" 45 46 static int wdchkind_C(wchar_t); 47 static int (*wdchknd)(wchar_t) = wdchkind_C; 48 static int wdbindf_C(wchar_t, wchar_t, int); 49 static int (*wdbdg)(wchar_t, wchar_t, int) = wdbindf_C; 50 static wchar_t *wddelim_C(wchar_t, wchar_t, int); 51 static wchar_t *(*wddlm)(wchar_t, wchar_t, int) = wddelim_C; 52 static wchar_t (*mcfllr)(void) = NULL; 53 static int (*mcwrp)(void) = NULL; 54 static void *modhandle = NULL; 55 static int initialized = 0; 56 57 static int 58 _wdinitialize(void) 59 { 60 #define _DFLTLOCPATH_LEN (sizeof (_DFLT_LOC_PATH) - 1) 61 #define _WDMODPATH_LEN (sizeof (_WDMOD_PATH) - 1) 62 char wdmodpath[PATH_MAX]; 63 char *loc; 64 size_t loclen; 65 locale_t curloc; 66 67 initialized = 1; 68 69 if (modhandle) 70 (void) dlclose(modhandle); 71 72 curloc = uselocale(NULL); 73 loc = current_locale(curloc, LC_CTYPE); 74 loclen = strlen(loc); 75 if (_DFLTLOCPATH_LEN + loclen + _WDMODPATH_LEN >= sizeof (wdmodpath)) { 76 /* pathname too long */ 77 modhandle = NULL; 78 goto C_fallback; 79 } 80 81 (void) strcpy(wdmodpath, _DFLT_LOC_PATH); 82 (void) strcpy(wdmodpath + _DFLTLOCPATH_LEN, loc); 83 (void) strcpy(wdmodpath + _DFLTLOCPATH_LEN + loclen, _WDMOD_PATH); 84 85 if ((modhandle = dlopen(wdmodpath, RTLD_LAZY)) != NULL) { 86 wdchknd = (int(*)(wchar_t))dlsym(modhandle, "_wdchkind_"); 87 if (wdchknd == NULL) 88 wdchknd = wdchkind_C; 89 wdbdg = (int(*)(wchar_t, wchar_t, int))dlsym(modhandle, 90 "_wdbindf_"); 91 if (wdbdg == NULL) 92 wdbdg = wdbindf_C; 93 wddlm = (wchar_t *(*)(wchar_t, wchar_t, int)) 94 dlsym(modhandle, "_wddelim_"); 95 if (wddlm == NULL) 96 wddlm = wddelim_C; 97 mcfllr = (wchar_t(*)(void))dlsym(modhandle, "_mcfiller_"); 98 mcwrp = (int(*)(void))dlsym(modhandle, "_mcwrap_"); 99 return ((mcfllr && mcwrp) ? 0 : -1); 100 } 101 102 C_fallback: 103 wdchknd = wdchkind_C; 104 wdbdg = wdbindf_C; 105 wddlm = wddelim_C; 106 mcfllr = NULL; 107 mcwrp = NULL; 108 return (-1); 109 } 110 111 /* 112 * wdinit() initializes other word-analyzing routines according to the 113 * current locale. Programmers are supposed to call this routine every 114 * time the locale for the LC_CTYPE category is changed. It returns 0 115 * when every initialization completes successfully, or -1 otherwise. 116 */ 117 /* XXX: wdinit() is not exported from libc. Should it be? */ 118 int 119 wdinit() 120 { 121 int res; 122 123 callout_lock_enter(); 124 res = _wdinitialize(); 125 callout_lock_exit(); 126 return (res); 127 } 128 129 /* 130 * wdchkind() returns a non-negative integral value unique to the kind 131 * of the character represented by given argument. 132 */ 133 int 134 wdchkind(wchar_t wc) 135 { 136 int i; 137 138 callout_lock_enter(); 139 if (!initialized) 140 (void) _wdinitialize(); 141 i = (*wdchknd)(wc); 142 callout_lock_exit(); 143 return (i); 144 } 145 static int 146 wdchkind_C(wchar_t wc) 147 { 148 switch (wcsetno(wc)) { 149 case 1: 150 return (2); 151 case 2: 152 return (3); 153 case 3: 154 return (4); 155 case 0: 156 return (isascii(wc) && 157 (isalpha(wc) || isdigit(wc) || wc == ' ')); 158 } 159 return (0); 160 } 161 162 /* 163 * wdbindf() returns an integral value (0 - 7) indicating binding 164 * strength of two characters represented by the first two arguments. 165 * It returns -1 when either of the two character is not printable. 166 */ 167 int 168 wdbindf(wchar_t wc1, wchar_t wc2, int type) 169 { 170 int i; 171 172 callout_lock_enter(); 173 if (!initialized) 174 (void) _wdinitialize(); 175 if (!iswprint(wc1) || !iswprint(wc2)) { 176 callout_lock_exit(); 177 return (-1); 178 } 179 i = (*wdbdg)(wc1, wc2, type); 180 callout_lock_exit(); 181 return (i); 182 } 183 184 static int 185 wdbindf_C(wchar_t wc1, wchar_t wc2, int type __unused) 186 { 187 if (csetlen(wc1) > 1 && csetlen(wc2) > 1) 188 return (4); 189 return (6); 190 } 191 192 /* 193 * wddelim() returns a pointer to a null-terminated word delimiter 194 * string in wchar_t type that is thought most appropriate to join 195 * a text line ending with the first argument and a line beginning 196 * with the second argument, with. When either of the two character 197 * is not printable it returns a pointer to a null wide character. 198 */ 199 wchar_t * 200 wddelim(wchar_t wc1, wchar_t wc2, int type) 201 { 202 wchar_t *i; 203 204 callout_lock_enter(); 205 if (!initialized) 206 (void) _wdinitialize(); 207 if (!iswprint(wc1) || !iswprint(wc2)) { 208 callout_lock_exit(); 209 return ((wchar_t *)L""); 210 } 211 i = (*wddlm)(wc1, wc2, type); 212 callout_lock_exit(); 213 return (i); 214 } 215 216 static wchar_t * 217 wddelim_C(wchar_t wc1 __unused, wchar_t wc2 __unused, int type __unused) 218 { 219 return ((wchar_t *)L" "); 220 } 221 222 /* 223 * mcfiller returns a printable ASCII character suggested for use in 224 * filling space resulted by a multicolumn character at the right margin. 225 */ 226 wchar_t 227 mcfiller(void) 228 { 229 wchar_t fillerchar; 230 231 callout_lock_enter(); 232 if (!initialized) 233 (void) _wdinitialize(); 234 if (mcfllr) { 235 fillerchar = (*mcfllr)(); 236 if (!fillerchar) 237 fillerchar = (wchar_t)'~'; 238 if (iswprint(fillerchar)) { 239 callout_lock_exit(); 240 return (fillerchar); 241 } 242 } 243 callout_lock_exit(); 244 return ((wchar_t)'~'); 245 } 246 247 /* 248 * mcwrap returns an integral value indicating if a multicolumn character 249 * on the right margin should be wrapped around on a terminal screen. 250 */ 251 /* XXX: mcwrap() is not exported from libc. Should it be? */ 252 int 253 mcwrap(void) 254 { 255 callout_lock_enter(); 256 if (!initialized) 257 (void) _wdinitialize(); 258 if (mcwrp) 259 if ((*mcwrp)() == 0) { 260 callout_lock_exit(); 261 return (0); 262 } 263 callout_lock_exit(); 264 return (1); 265 } 266