1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2003, 2005 Ryuichiro Imura
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD$
29 */
30
31 /*
32 * kiconv(3) requires shared linked, and reduce module size
33 * when statically linked.
34 */
35
36 #ifdef PIC
37
38 #include <sys/types.h>
39 #include <sys/iconv.h>
40 #include <sys/sysctl.h>
41
42 #include <ctype.h>
43 #include <dlfcn.h>
44 #include <err.h>
45 #include <errno.h>
46 #include <locale.h>
47 #include <stdio.h>
48 #include <stdlib.h>
49 #include <string.h>
50 #include <wctype.h>
51
52 #include "quirks.h"
53
54 struct xlat16_table {
55 uint32_t * idx[0x200];
56 void * data;
57 size_t size;
58 };
59
60 static struct xlat16_table kiconv_xlat16_open(const char *, const char *, int);
61 static int chklocale(int, const char *);
62
63 #ifdef ICONV_DLOPEN
64 typedef void *iconv_t;
65 static int my_iconv_init(void);
66 static iconv_t (*my_iconv_open)(const char *, const char *);
67 static size_t (*my_iconv)(iconv_t, char **, size_t *, char **, size_t *);
68 static int (*my_iconv_close)(iconv_t);
69 #else
70 #include <iconv.h>
71 #define my_iconv_init() 0
72 #define my_iconv_open iconv_open
73 #define my_iconv iconv
74 #define my_iconv_close iconv_close
75 #endif
76 static size_t my_iconv_char(iconv_t, u_char **, size_t *, u_char **, size_t *);
77
78 int
kiconv_add_xlat16_cspair(const char * tocode,const char * fromcode,int flag)79 kiconv_add_xlat16_cspair(const char *tocode, const char *fromcode, int flag)
80 {
81 int error;
82 size_t idxsize;
83 struct xlat16_table xt;
84 void *data;
85 char *p;
86 const char unicode[] = ENCODING_UNICODE;
87
88 if ((flag & KICONV_WCTYPE) == 0 &&
89 strcmp(unicode, tocode) != 0 &&
90 strcmp(unicode, fromcode) != 0 &&
91 kiconv_lookupconv(unicode) == 0) {
92 error = kiconv_add_xlat16_cspair(unicode, fromcode, flag);
93 if (error)
94 return (-1);
95 error = kiconv_add_xlat16_cspair(tocode, unicode, flag);
96 return (error);
97 }
98
99 if (kiconv_lookupcs(tocode, fromcode) == 0)
100 return (0);
101
102 if (flag & KICONV_WCTYPE)
103 xt = kiconv_xlat16_open(fromcode, fromcode, flag);
104 else
105 xt = kiconv_xlat16_open(tocode, fromcode, flag);
106 if (xt.size == 0)
107 return (-1);
108
109 idxsize = sizeof(xt.idx);
110
111 if ((idxsize + xt.size) > ICONV_CSMAXDATALEN) {
112 errno = E2BIG;
113 return (-1);
114 }
115
116 if ((data = malloc(idxsize + xt.size)) != NULL) {
117 p = data;
118 memcpy(p, xt.idx, idxsize);
119 p += idxsize;
120 memcpy(p, xt.data, xt.size);
121 error = kiconv_add_xlat16_table(tocode, fromcode, data,
122 (int)(idxsize + xt.size));
123 return (error);
124 }
125
126 return (-1);
127 }
128
129 int
kiconv_add_xlat16_cspairs(const char * foreigncode,const char * localcode)130 kiconv_add_xlat16_cspairs(const char *foreigncode, const char *localcode)
131 {
132 int error, locale;
133
134 error = kiconv_add_xlat16_cspair(foreigncode, localcode,
135 KICONV_FROM_LOWER | KICONV_FROM_UPPER);
136 if (error)
137 return (error);
138 error = kiconv_add_xlat16_cspair(localcode, foreigncode,
139 KICONV_LOWER | KICONV_UPPER);
140 if (error)
141 return (error);
142 locale = chklocale(LC_CTYPE, localcode);
143 if (locale == 0) {
144 error = kiconv_add_xlat16_cspair(KICONV_WCTYPE_NAME, localcode,
145 KICONV_WCTYPE);
146 if (error)
147 return (error);
148 }
149
150 return (0);
151 }
152
153 static struct xlat16_table
kiconv_xlat16_open(const char * tocode,const char * fromcode,int lcase)154 kiconv_xlat16_open(const char *tocode, const char *fromcode, int lcase)
155 {
156 u_char src[3], dst[4], *srcp, *dstp, ud, ld;
157 int us, ls, ret;
158 uint16_t c;
159 uint32_t table[0x80];
160 size_t inbytesleft, outbytesleft, pre_q_size, post_q_size;
161 struct xlat16_table xt;
162 struct quirk_replace_list *pre_q_list, *post_q_list;
163 iconv_t cd;
164 char *p;
165
166 xt.data = NULL;
167 xt.size = 0;
168
169 src[2] = '\0';
170 dst[3] = '\0';
171
172 ret = my_iconv_init();
173 if (ret)
174 return (xt);
175
176 cd = my_iconv_open(search_quirk(tocode, fromcode, &pre_q_list, &pre_q_size),
177 search_quirk(fromcode, tocode, &post_q_list, &post_q_size));
178 if (cd == (iconv_t) (-1))
179 return (xt);
180
181 if ((xt.data = malloc(0x200 * 0x80 * sizeof(uint32_t))) == NULL)
182 return (xt);
183
184 p = xt.data;
185
186 for (ls = 0 ; ls < 0x200 ; ls++) {
187 xt.idx[ls] = NULL;
188 for (us = 0 ; us < 0x80 ; us++) {
189 srcp = src;
190 dstp = dst;
191
192 inbytesleft = 2;
193 outbytesleft = 3;
194 bzero(dst, outbytesleft);
195
196 c = ((ls & 0x100 ? us | 0x80 : us) << 8) | (u_char)ls;
197
198 if (lcase & KICONV_WCTYPE) {
199 if ((c & 0xff) == 0)
200 c >>= 8;
201 if (iswupper(c)) {
202 c = towlower(c);
203 if ((c & 0xff00) == 0)
204 c <<= 8;
205 table[us] = c | XLAT16_HAS_LOWER_CASE;
206 } else if (iswlower(c)) {
207 c = towupper(c);
208 if ((c & 0xff00) == 0)
209 c <<= 8;
210 table[us] = c | XLAT16_HAS_UPPER_CASE;
211 } else
212 table[us] = 0;
213 /*
214 * store not NULL
215 */
216 if (table[us])
217 xt.idx[ls] = table;
218
219 continue;
220 }
221
222 c = quirk_vendor2unix(c, pre_q_list, pre_q_size);
223 src[0] = (u_char)(c >> 8);
224 src[1] = (u_char)c;
225
226 ret = my_iconv_char(cd, &srcp, &inbytesleft,
227 &dstp, &outbytesleft);
228 if (ret == -1) {
229 table[us] = 0;
230 continue;
231 }
232
233 ud = (u_char)dst[0];
234 ld = (u_char)dst[1];
235
236 switch(outbytesleft) {
237 case 0:
238 #ifdef XLAT16_ACCEPT_3BYTE_CHR
239 table[us] = (ud << 8) | ld;
240 table[us] |= (u_char)dst[2] << 16;
241 table[us] |= XLAT16_IS_3BYTE_CHR;
242 #else
243 table[us] = 0;
244 continue;
245 #endif
246 break;
247 case 1:
248 table[us] = quirk_unix2vendor((ud << 8) | ld,
249 post_q_list, post_q_size);
250 if ((table[us] >> 8) == 0)
251 table[us] |= XLAT16_ACCEPT_NULL_OUT;
252 break;
253 case 2:
254 table[us] = ud;
255 if (lcase & KICONV_LOWER && ud != tolower(ud)) {
256 table[us] |= (u_char)tolower(ud) << 16;
257 table[us] |= XLAT16_HAS_LOWER_CASE;
258 }
259 if (lcase & KICONV_UPPER && ud != toupper(ud)) {
260 table[us] |= (u_char)toupper(ud) << 16;
261 table[us] |= XLAT16_HAS_UPPER_CASE;
262 }
263 break;
264 }
265
266 switch(inbytesleft) {
267 case 0:
268 if ((ls & 0xff) == 0)
269 table[us] |= XLAT16_ACCEPT_NULL_IN;
270 break;
271 case 1:
272 c = ls > 0xff ? us | 0x80 : us;
273 if (lcase & KICONV_FROM_LOWER && c != tolower(c)) {
274 table[us] |= (u_char)tolower(c) << 16;
275 table[us] |= XLAT16_HAS_FROM_LOWER_CASE;
276 }
277 if (lcase & KICONV_FROM_UPPER && c != toupper(c)) {
278 table[us] |= (u_char)toupper(c) << 16;
279 table[us] |= XLAT16_HAS_FROM_UPPER_CASE;
280 }
281 break;
282 }
283
284 if (table[us] == 0)
285 continue;
286
287 /*
288 * store not NULL
289 */
290 xt.idx[ls] = table;
291 }
292 if (xt.idx[ls]) {
293 memcpy(p, table, sizeof(table));
294 p += sizeof(table);
295 }
296 }
297 my_iconv_close(cd);
298
299 xt.size = p - (char *)xt.data;
300 xt.data = realloc(xt.data, xt.size);
301 return (xt);
302 }
303
304 static int
chklocale(int category,const char * code)305 chklocale(int category, const char *code)
306 {
307 char *p;
308 int error = -1;
309
310 p = strchr(setlocale(category, NULL), '.');
311 if (p++) {
312 error = strcasecmp(code, p);
313 if (error) {
314 /* XXX - can't avoid calling quirk here... */
315 error = strcasecmp(code, kiconv_quirkcs(p,
316 KICONV_VENDOR_MICSFT));
317 }
318 }
319 return (error);
320 }
321
322 #ifdef ICONV_DLOPEN
323 static int
my_iconv_init(void)324 my_iconv_init(void)
325 {
326 void *iconv_lib;
327
328 iconv_lib = dlopen("libiconv.so", RTLD_LAZY | RTLD_GLOBAL);
329 if (iconv_lib == NULL) {
330 warn("Unable to load iconv library: %s\n", dlerror());
331 errno = ENOENT;
332 return (-1);
333 }
334 my_iconv_open = dlsym(iconv_lib, "iconv_open");
335 my_iconv = dlsym(iconv_lib, "iconv");
336 my_iconv_close = dlsym(iconv_lib, "iconv_close");
337
338 return (0);
339 }
340 #endif
341
342 static size_t
my_iconv_char(iconv_t cd,u_char ** ibuf,size_t * ilen,u_char ** obuf,size_t * olen)343 my_iconv_char(iconv_t cd, u_char **ibuf, size_t * ilen, u_char **obuf,
344 size_t * olen)
345 {
346 u_char *sp, *dp, ilocal[3], olocal[3];
347 u_char c1, c2;
348 int ret;
349 size_t ir, or;
350
351 sp = *ibuf;
352 dp = *obuf;
353 ir = *ilen;
354
355 bzero(*obuf, *olen);
356 ret = my_iconv(cd, (char **)&sp, ilen, (char **)&dp, olen);
357 c1 = (*obuf)[0];
358 c2 = (*obuf)[1];
359
360 if (ret == -1) {
361 if (*ilen == ir - 1 && (*ibuf)[1] == '\0' && (c1 || c2))
362 return (0);
363 else
364 return (-1);
365 }
366
367 /*
368 * We must judge if inbuf is a single byte char or double byte char.
369 * Here, to judge, try first byte(*sp) conversion and compare.
370 */
371 ir = 1;
372 or = 3;
373
374 bzero(olocal, or);
375 memcpy(ilocal, *ibuf, sizeof(ilocal));
376 sp = ilocal;
377 dp = olocal;
378
379 if ((my_iconv(cd,(char **)&sp, &ir, (char **)&dp, &or)) != -1) {
380 if (olocal[0] != c1)
381 return (ret);
382
383 if (olocal[1] == c2 && (*ibuf)[1] == '\0') {
384 /*
385 * inbuf is a single byte char
386 */
387 *ilen = 1;
388 *olen = or;
389 return (ret);
390 }
391
392 switch(or) {
393 case 0:
394 case 1:
395 if (olocal[1] == c2) {
396 /*
397 * inbuf is a single byte char,
398 * so return false here.
399 */
400 return (-1);
401 } else {
402 /*
403 * inbuf is a double byte char
404 */
405 return (ret);
406 }
407 break;
408 case 2:
409 /*
410 * should compare second byte of inbuf
411 */
412 break;
413 }
414 } else {
415 /*
416 * inbuf clould not be splitted, so inbuf is
417 * a double byte char.
418 */
419 return (ret);
420 }
421
422 /*
423 * try second byte(*(sp+1)) conversion, and compare
424 */
425 ir = 1;
426 or = 3;
427
428 bzero(olocal, or);
429
430 sp = ilocal + 1;
431 dp = olocal;
432
433 if ((my_iconv(cd,(char **)&sp, &ir, (char **)&dp, &or)) != -1) {
434 if (olocal[0] == c2)
435 /*
436 * inbuf is a single byte char
437 */
438 return (-1);
439 }
440
441 return (ret);
442 }
443
444 #else /* statically linked */
445
446 #include <sys/types.h>
447 #include <sys/iconv.h>
448 #include <errno.h>
449
450 int
kiconv_add_xlat16_cspair(const char * tocode __unused,const char * fromcode __unused,int flag __unused)451 kiconv_add_xlat16_cspair(const char *tocode __unused, const char *fromcode __unused,
452 int flag __unused)
453 {
454
455 errno = EINVAL;
456 return (-1);
457 }
458
459 int
kiconv_add_xlat16_cspairs(const char * tocode __unused,const char * fromcode __unused)460 kiconv_add_xlat16_cspairs(const char *tocode __unused, const char *fromcode __unused)
461 {
462 errno = EINVAL;
463 return (-1);
464 }
465
466 #endif /* PIC */
467