usr.bin/localedef/charmap.c

   1 /*
   2  * Copyright 2010 Nexenta Systems, Inc.  All rights reserved.
   3  * Copyright 2015 John Marino <draco@marino.st>
   4  *
   5  * This source code is derived from the illumos localedef command, and
   6  * provided under BSD-style license terms by Nexenta Systems, Inc.
   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  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  19  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 /*
  32  * CHARMAP file handling for localedef.
  33  */
  34
  35 #include <sys/types.h>
  36 #include <sys/tree.h>
  37
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <limits.h>
  42 #include <unistd.h>
  43 #include <stddef.h>
  44 #include "localedef.h"
  45 #include "parser.h"
  46
  47
  48 typedef struct charmap {
  49         const char *name;
  50         wchar_t wc;
  51         RB_ENTRY(charmap) rb_sym;
  52         RB_ENTRY(charmap) rb_wc;
  53 } charmap_t;
  54
  55 static int cmap_compare_sym(const void *n1, const void *n2);
  56 static int cmap_compare_wc(const void *n1, const void *n2);
  57
  58 static RB_HEAD(cmap_sym, charmap) cmap_sym;
  59 static RB_HEAD(cmap_wc, charmap) cmap_wc;
  60
  61 RB_PROTOTYPE_STATIC(cmap_sym, charmap, rb_sym, cmap_compare_sym);
  62 RB_PROTOTYPE_STATIC(cmap_wc, charmap, rb_wc, cmap_compare_wc);
  63
  64 RB_GENERATE(cmap_sym, charmap, rb_sym, cmap_compare_sym);
  65 RB_GENERATE(cmap_wc, charmap, rb_wc, cmap_compare_wc);
  66
  67 /*
  68  * Array of POSIX specific portable characters.
  69  */
  70
  71 static const struct {
  72         const char *name;
  73         int     ch;
  74 } portable_chars[] = {
  75         { "NUL",                '\0' },
  76         { "alert",              '\a' },
  77         { "backspace",          '\b' },
  78         { "tab",                '\t' },
  79         { "carriage-return",    '\r' },
  80         { "newline",            '\n' },
  81         { "vertical-tab",       '\v' },
  82         { "form-feed",          '\f' },
  83         { "space",              ' ' },
  84         { "exclamation-mark",   '!' },
  85         { "quotation-mark",     '"' },
  86         { "number-sign",        '#' },
  87         { "dollar-sign",        '$' },
  88         { "percent-sign",       '%' },
  89         { "ampersand",          '&' },
  90         { "apostrophe",         '\'' },
  91         { "left-parenthesis",   '(' },
  92         { "right-parenthesis",  '(' },
  93         { "asterisk",           '*' },
  94         { "plus-sign",          '+' },
  95         { "comma",               ','},
  96         { "hyphen-minus",       '-' },
  97         { "hyphen",             '-' },
  98         { "full-stop",          '.' },
  99         { "period",             '.' },
 100         { "slash",              '/' },
 101         { "solidus",            '/' },
 102         { "zero",               '0' },
 103         { "one",                '1' },
 104         { "two",                '2' },
 105         { "three",              '3' },
 106         { "four",               '4' },
 107         { "five",               '5' },
 108         { "six",                '6' },
 109         { "seven",              '7' },
 110         { "eight",              '8' },
 111         { "nine",               '9' },
 112         { "colon",              ':' },
 113         { "semicolon",          ';' },
 114         { "less-than-sign",     '<' },
 115         { "equals-sign",        '=' },
 116         { "greater-than-sign",  '>' },
 117         { "question-mark",      '?' },
 118         { "commercial-at",      '@' },
 119         { "left-square-bracket", '[' },
 120         { "backslash",          '\\' },
 121         { "reverse-solidus",    '\\' },
 122         { "right-square-bracket", ']' },
 123         { "circumflex",         '^' },
 124         { "circumflex-accent",  '^' },
 125         { "low-line",           '_' },
 126         { "underscore",         '_' },
 127         { "grave-accent",       '`' },
 128         { "left-brace",         '{' },
 129         { "left-curly-bracket", '{' },
 130         { "vertical-line",      '|' },
 131         { "right-brace",        '}' },
 132         { "right-curly-bracket", '}' },
 133         { "tilde",              '~' },
 134         { "A", 'A' },
 135         { "B", 'B' },
 136         { "C", 'C' },
 137         { "D", 'D' },
 138         { "E", 'E' },
 139         { "F", 'F' },
 140         { "G", 'G' },
 141         { "H", 'H' },
 142         { "I", 'I' },
 143         { "J", 'J' },
 144         { "K", 'K' },
 145         { "L", 'L' },
 146         { "M", 'M' },
 147         { "N", 'N' },
 148         { "O", 'O' },
 149         { "P", 'P' },
 150         { "Q", 'Q' },
 151         { "R", 'R' },
 152         { "S", 'S' },
 153         { "T", 'T' },
 154         { "U", 'U' },
 155         { "V", 'V' },
 156         { "W", 'W' },
 157         { "X", 'X' },
 158         { "Y", 'Y' },
 159         { "Z", 'Z' },
 160         { "a", 'a' },
 161         { "b", 'b' },
 162         { "c", 'c' },
 163         { "d", 'd' },
 164         { "e", 'e' },
 165         { "f", 'f' },
 166         { "g", 'g' },
 167         { "h", 'h' },
 168         { "i", 'i' },
 169         { "j", 'j' },
 170         { "k", 'k' },
 171         { "l", 'l' },
 172         { "m", 'm' },
 173         { "n", 'n' },
 174         { "o", 'o' },
 175         { "p", 'p' },
 176         { "q", 'q' },
 177         { "r", 'r' },
 178         { "s", 's' },
 179         { "t", 't' },
 180         { "u", 'u' },
 181         { "v", 'v' },
 182         { "w", 'w' },
 183         { "x", 'x' },
 184         { "y", 'y' },
 185         { "z", 'z' },
 186         { NULL, 0 }
 187 };
 188
 189 static int
 190 cmap_compare_sym(const void *n1, const void *n2)
 191 {
 192         const charmap_t *c1 = n1;
 193         const charmap_t *c2 = n2;
 194         int rv;
 195
 196         rv = strcmp(c1->name, c2->name);
 197         return ((rv < 0) ? -1 : (rv > 0) ? 1 : 0);
 198 }
 199
 200 static int
 201 cmap_compare_wc(const void *n1, const void *n2)
 202 {
 203         const charmap_t *c1 = n1;
 204         const charmap_t *c2 = n2;
 205
 206         return ((c1->wc < c2->wc) ? -1 : (c1->wc > c2->wc) ? 1 : 0);
 207 }
 208
 209 void
 210 init_charmap(void)
 211 {
 212         RB_INIT(&cmap_sym);
 213
 214         RB_INIT(&cmap_wc);
 215 }
 216
 217 static void
 218 add_charmap_impl(const char *sym, wchar_t wc, int nodups)
 219 {
 220         charmap_t       srch;
 221         charmap_t       *n = NULL;
 222
 223         srch.wc = wc;
 224         srch.name = sym;
 225
 226         /*
 227          * also possibly insert the wide mapping, although note that there
 228          * can only be one of these per wide character code.
 229          */
 230         if ((wc != (wchar_t)-1) && ((RB_FIND(cmap_wc, &cmap_wc, &srch)) == NULL)) {
 231                 if ((n = calloc(1, sizeof (*n))) == NULL) {
 232                         errf("out of memory");
 233                         return;
 234                 }
 235                 n->wc = wc;
 236                 RB_INSERT(cmap_wc, &cmap_wc, n);
 237         }
 238
 239         if (sym) {
 240                 if (RB_FIND(cmap_sym, &cmap_sym, &srch) != NULL) {
 241                         if (nodups) {
 242                                 errf("duplicate character definition");
 243                         }
 244                         return;
 245                 }
 246                 if ((n == NULL) && ((n = calloc(1, sizeof (*n))) == NULL)) {
 247                         errf("out of memory");
 248                         return;
 249                 }
 250                 n->wc = wc;
 251                 n->name = sym;
 252
 253                 RB_INSERT(cmap_sym, &cmap_sym, n);
 254         }
 255 }
 256
 257 void
 258 add_charmap(const char *sym, int c)
 259 {
 260         add_charmap_impl(sym, c, 1);
 261 }
 262
 263 void
 264 add_charmap_undefined(char *sym)
 265 {
 266         charmap_t srch;
 267         charmap_t *cm = NULL;
 268
 269         srch.name = sym;
 270         cm = RB_FIND(cmap_sym, &cmap_sym, &srch);
 271
 272         if ((undefok == 0) && ((cm == NULL) || (cm->wc == (wchar_t)-1))) {
 273                 warn("undefined symbol <%s>", sym);
 274                 add_charmap_impl(sym, -1, 0);
 275         } else {
 276                 free(sym);
 277         }
 278 }
 279
 280 void
 281 add_charmap_range(char *s, char *e, int wc)
 282 {
 283         int     ls, le;
 284         int     si;
 285         int     sn, en;
 286         int     i;
 287
 288         static const char *digits = "0123456789";
 289
 290         ls = strlen(s);
 291         le = strlen(e);
 292
 293         if (((si = strcspn(s, digits)) == 0) || (si == ls) ||
 294             (strncmp(s, e, si) != 0) ||
 295             ((int)strspn(s + si, digits) != (ls - si)) ||
 296             ((int)strspn(e + si, digits) != (le - si)) ||
 297             ((sn = atoi(s + si)) > ((en = atoi(e + si))))) {
 298                 errf("malformed charmap range");
 299                 return;
 300         }
 301
 302         s[si] = 0;
 303
 304         for (i = sn; i <= en; i++) {
 305                 char *nn;
 306                 (void) asprintf(&nn, "%s%0*u", s, ls - si, i);
 307                 if (nn == NULL) {
 308                         errf("out of memory");
 309                         return;
 310                 }
 311
 312                 add_charmap_impl(nn, wc, 1);
 313                 wc++;
 314         }
 315         free(s);
 316         free(e);
 317 }
 318
 319 void
 320 add_charmap_char(const char *name, int val)
 321 {
 322         add_charmap_impl(name, val, 0);
 323 }
 324
 325 /*
 326  * POSIX insists that certain entries be present, even when not in the
 327  * orginal charmap file.
 328  */
 329 void
 330 add_charmap_posix(void)
 331 {
 332         int     i;
 333
 334         for (i = 0; portable_chars[i].name; i++) {
 335                 add_charmap_char(portable_chars[i].name, portable_chars[i].ch);
 336         }
 337 }
 338
 339 int
 340 lookup_charmap(const char *sym, wchar_t *wc)
 341 {
 342         charmap_t       srch;
 343         charmap_t       *n;
 344
 345         srch.name = sym;
 346         n = RB_FIND(cmap_sym, &cmap_sym, &srch);
 347         if (n && n->wc != (wchar_t)-1) {
 348                 if (wc)
 349                         *wc = n->wc;
 350                 return (0);
 351         }
 352         return (-1);
 353 }
 354
 355 int
 356 check_charmap(wchar_t wc)
 357 {
 358         charmap_t srch;
 359
 360         srch.wc = wc;
 361         return (RB_FIND(cmap_wc, &cmap_wc, &srch) ? 0 : -1);
 362 }