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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include "synonyms.h" 30 #include "mtlib.h" 31 #include <sys/types.h> 32 #include <ctype.h> 33 #include <string.h> 34 #include <stdlib.h> 35 #include <euc.h> 36 #include <widec.h> 37 #include <wctype.h> 38 #include <limits.h> 39 #include <synch.h> 40 #include <thread.h> 41 #include <libintl.h> 42 #include "libc.h" 43 44 #include <locale.h> 45 #include <dlfcn.h> 46 #include "_loc_path.h" 47 48 static int wdchkind_C(wchar_t); 49 static int (*wdchknd)(wchar_t) = wdchkind_C; 50 static int wdbindf_C(wchar_t, wchar_t, int); 51 static int (*wdbdg)(wchar_t, wchar_t, int) = wdbindf_C; 52 static wchar_t *wddelim_C(wchar_t, wchar_t, int); 53 static wchar_t *(*wddlm)(wchar_t, wchar_t, int) = wddelim_C; 54 static wchar_t (*mcfllr)(void) = NULL; 55 static int (*mcwrp)(void) = NULL; 56 static void *modhandle = NULL; 57 static int initialized = 0; 58 59 static int 60 _wdinitialize(void) 61 { 62 #define _DFLTLOCPATH_LEN (sizeof (_DFLT_LOC_PATH) - 1) 63 #define _WDMODPATH_LEN (sizeof (_WDMOD_PATH) - 1) 64 char wdmodpath[PATH_MAX]; 65 char *loc; 66 size_t loclen; 67 68 initialized = 1; 69 70 if (modhandle) 71 (void) dlclose(modhandle); 72 73 loc = setlocale(LC_CTYPE, NULL); /* this never return NULL */ 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 (void) fork_lock_enter(NULL); 124 res = _wdinitialize(); 125 fork_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 (void) fork_lock_enter(NULL); 139 if (!initialized) 140 (void) _wdinitialize(); 141 i = (*wdchknd)(wc); 142 fork_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 /*ARGSUSED*/ 168 int 169 wdbindf(wchar_t wc1, wchar_t wc2, int type) 170 { 171 int i; 172 173 (void) fork_lock_enter(NULL); 174 if (!initialized) 175 (void) _wdinitialize(); 176 if (!iswprint(wc1) || !iswprint(wc2)) { 177 fork_lock_exit(); 178 return (-1); 179 } 180 i = (*wdbdg)(wc1, wc2, type); 181 fork_lock_exit(); 182 return (i); 183 } 184 /*ARGSUSED*/ 185 static int 186 wdbindf_C(wchar_t wc1, wchar_t wc2, int type) 187 { 188 if (csetlen(wc1) > 1 && csetlen(wc2) > 1) 189 return (4); 190 return (6); 191 } 192 193 /* 194 * wddelim() returns a pointer to a null-terminated word delimiter 195 * string in wchar_t type that is thought most appropriate to join 196 * a text line ending with the first argument and a line beginning 197 * with the second argument, with. When either of the two character 198 * is not printable it returns a pointer to a null wide character. 199 */ 200 /*ARGSUSED*/ 201 wchar_t * 202 wddelim(wchar_t wc1, wchar_t wc2, int type) 203 { 204 wchar_t *i; 205 206 (void) fork_lock_enter(NULL); 207 if (!initialized) 208 (void) _wdinitialize(); 209 if (!iswprint(wc1) || !iswprint(wc2)) { 210 fork_lock_exit(); 211 return ((wchar_t *)L""); 212 } 213 i = (*wddlm)(wc1, wc2, type); 214 fork_lock_exit(); 215 return (i); 216 } 217 /*ARGSUSED*/ 218 static wchar_t * 219 wddelim_C(wchar_t wc1, wchar_t wc2, int type) 220 { 221 return ((wchar_t *)L" "); 222 } 223 224 /* 225 * mcfiller returns a printable ASCII character suggested for use in 226 * filling space resulted by a multicolumn character at the right margin. 227 */ 228 wchar_t 229 mcfiller(void) 230 { 231 wchar_t fillerchar; 232 233 (void) fork_lock_enter(NULL); 234 if (!initialized) 235 (void) _wdinitialize(); 236 if (mcfllr) { 237 fillerchar = (*mcfllr)(); 238 if (!fillerchar) 239 fillerchar = (wchar_t)'~'; 240 if (iswprint(fillerchar)) { 241 fork_lock_exit(); 242 return (fillerchar); 243 } 244 } 245 fork_lock_exit(); 246 return ((wchar_t)'~'); 247 } 248 249 /* 250 * mcwrap returns an integral value indicating if a multicolumn character 251 * on the right margin should be wrapped around on a terminal screen. 252 */ 253 /* XXX: mcwrap() is not exported from libc. Should it be? */ 254 int 255 mcwrap(void) 256 { 257 (void) fork_lock_enter(NULL); 258 if (!initialized) 259 (void) _wdinitialize(); 260 if (mcwrp) 261 if ((*mcwrp)() == 0) { 262 fork_lock_exit(); 263 return (0); 264 } 265 fork_lock_exit(); 266 return (1); 267 } 268