1 /*-
2 * Copyright (c) 2003, 2005 Ryuichiro Imura
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/lib/libkiconv/xlat16_iconv.c 281550 2015-04-15 09:09:20Z tijl $
27 */
28
29 /*
30 * kiconv(3) requires shared linked, and reduce module size
31 * when statically linked.
32 */
33
34 #ifdef PIC
35
36 #include <sys/types.h>
37 #include <sys/iconv.h>
38 #include <sys/sysctl.h>
39
40 #include <ctype.h>
41 #include <dlfcn.h>
42 #include <err.h>
43 #include <errno.h>
44 #include <iconv.h>
45 #include <locale.h>
46 #include <stdio.h>
47 #include <stdlib.h>
48 #include <string.h>
49 #include <wctype.h>
50
51 #include "quirks.h"
52
53 struct xlat16_table {
54 uint32_t * idx[0x200];
55 void * data;
56 size_t size;
57 };
58
59 static struct xlat16_table kiconv_xlat16_open(const char *, const char *, int);
60 static int chklocale(int, const char *);
61
62 #define my_iconv_init() 0
63 #define my_iconv_open iconv_open
64 #define my_iconv iconv
65 #define my_iconv_close iconv_close
66 static size_t my_iconv_char(iconv_t, u_char **, size_t *, u_char **, size_t *);
67
68 int
kiconv_add_xlat16_cspair(const char * tocode,const char * fromcode,int flag)69 kiconv_add_xlat16_cspair(const char *tocode, const char *fromcode, int flag)
70 {
71 int error;
72 size_t idxsize;
73 struct xlat16_table xt;
74 void *data;
75 char *p;
76 const char unicode[] = ENCODING_UNICODE;
77
78 if ((flag & KICONV_WCTYPE) == 0 &&
79 strcmp(unicode, tocode) != 0 &&
80 strcmp(unicode, fromcode) != 0 &&
81 kiconv_lookupconv(unicode) == 0) {
82 error = kiconv_add_xlat16_cspair(unicode, fromcode, flag);
83 if (error)
84 return (-1);
85 error = kiconv_add_xlat16_cspair(tocode, unicode, flag);
86 return (error);
87 }
88
89 if (kiconv_lookupcs(tocode, fromcode) == 0)
90 return (0);
91
92 if (flag & KICONV_WCTYPE)
93 xt = kiconv_xlat16_open(fromcode, fromcode, flag);
94 else
95 xt = kiconv_xlat16_open(tocode, fromcode, flag);
96 if (xt.size == 0)
97 return (-1);
98
99 idxsize = sizeof(xt.idx);
100
101 if ((idxsize + xt.size) > ICONV_CSMAXDATALEN) {
102 errno = E2BIG;
103 return (-1);
104 }
105
106 if ((data = malloc(idxsize + xt.size)) != NULL) {
107 p = data;
108 memcpy(p, xt.idx, idxsize);
109 p += idxsize;
110 memcpy(p, xt.data, xt.size);
111 error = kiconv_add_xlat16_table(tocode, fromcode, data,
112 (int)(idxsize + xt.size));
113 return (error);
114 }
115
116 return (-1);
117 }
118
119 int
kiconv_add_xlat16_cspairs(const char * foreigncode,const char * localcode)120 kiconv_add_xlat16_cspairs(const char *foreigncode, const char *localcode)
121 {
122 int error, locale;
123
124 error = kiconv_add_xlat16_cspair(foreigncode, localcode,
125 KICONV_FROM_LOWER | KICONV_FROM_UPPER);
126 if (error)
127 return (error);
128 error = kiconv_add_xlat16_cspair(localcode, foreigncode,
129 KICONV_LOWER | KICONV_UPPER);
130 if (error)
131 return (error);
132 locale = chklocale(LC_CTYPE, localcode);
133 if (locale == 0) {
134 error = kiconv_add_xlat16_cspair(KICONV_WCTYPE_NAME, localcode,
135 KICONV_WCTYPE);
136 if (error)
137 return (error);
138 }
139
140 return (0);
141 }
142
143 static struct xlat16_table
kiconv_xlat16_open(const char * tocode,const char * fromcode,int lcase)144 kiconv_xlat16_open(const char *tocode, const char *fromcode, int lcase)
145 {
146 u_char src[3], dst[4], *srcp, *dstp, ud, ld;
147 int us, ls, ret;
148 uint16_t c;
149 uint32_t table[0x80];
150 size_t inbytesleft, outbytesleft, pre_q_size, post_q_size;
151 struct xlat16_table xt;
152 struct quirk_replace_list *pre_q_list, *post_q_list;
153 iconv_t cd;
154 char *p;
155
156 xt.data = NULL;
157 xt.size = 0;
158
159 src[2] = '\0';
160 dst[3] = '\0';
161
162 ret = my_iconv_init();
163 if (ret)
164 return (xt);
165
166 cd = my_iconv_open(search_quirk(tocode, fromcode, &pre_q_list, &pre_q_size),
167 search_quirk(fromcode, tocode, &post_q_list, &post_q_size));
168 if (cd == (iconv_t) (-1))
169 return (xt);
170
171 if ((xt.data = malloc(0x200 * 0x80 * sizeof(uint32_t))) == NULL)
172 return (xt);
173
174 p = xt.data;
175
176 for (ls = 0 ; ls < 0x200 ; ls++) {
177 xt.idx[ls] = NULL;
178 for (us = 0 ; us < 0x80 ; us++) {
179 srcp = src;
180 dstp = dst;
181
182 inbytesleft = 2;
183 outbytesleft = 3;
184 bzero(dst, outbytesleft);
185
186 c = ((ls & 0x100 ? us | 0x80 : us) << 8) | (u_char)ls;
187
188 if (lcase & KICONV_WCTYPE) {
189 if ((c & 0xff) == 0)
190 c >>= 8;
191 if (iswupper(c)) {
192 c = towlower(c);
193 if ((c & 0xff00) == 0)
194 c <<= 8;
195 table[us] = c | XLAT16_HAS_LOWER_CASE;
196 } else if (iswlower(c)) {
197 c = towupper(c);
198 if ((c & 0xff00) == 0)
199 c <<= 8;
200 table[us] = c | XLAT16_HAS_UPPER_CASE;
201 } else
202 table[us] = 0;
203 /*
204 * store not NULL
205 */
206 if (table[us])
207 xt.idx[ls] = table;
208
209 continue;
210 }
211
212 c = quirk_vendor2unix(c, pre_q_list, pre_q_size);
213 src[0] = (u_char)(c >> 8);
214 src[1] = (u_char)c;
215
216 ret = my_iconv_char(cd, &srcp, &inbytesleft,
217 &dstp, &outbytesleft);
218 if (ret == -1) {
219 table[us] = 0;
220 continue;
221 }
222
223 ud = (u_char)dst[0];
224 ld = (u_char)dst[1];
225
226 switch(outbytesleft) {
227 case 0:
228 #ifdef XLAT16_ACCEPT_3BYTE_CHR
229 table[us] = (ud << 8) | ld;
230 table[us] |= (u_char)dst[2] << 16;
231 table[us] |= XLAT16_IS_3BYTE_CHR;
232 #else
233 table[us] = 0;
234 continue;
235 #endif
236 break;
237 case 1:
238 table[us] = quirk_unix2vendor((ud << 8) | ld,
239 post_q_list, post_q_size);
240 if ((table[us] >> 8) == 0)
241 table[us] |= XLAT16_ACCEPT_NULL_OUT;
242 break;
243 case 2:
244 table[us] = ud;
245 if (lcase & KICONV_LOWER && ud != tolower(ud)) {
246 table[us] |= (u_char)tolower(ud) << 16;
247 table[us] |= XLAT16_HAS_LOWER_CASE;
248 }
249 if (lcase & KICONV_UPPER && ud != toupper(ud)) {
250 table[us] |= (u_char)toupper(ud) << 16;
251 table[us] |= XLAT16_HAS_UPPER_CASE;
252 }
253 break;
254 }
255
256 switch(inbytesleft) {
257 case 0:
258 if ((ls & 0xff) == 0)
259 table[us] |= XLAT16_ACCEPT_NULL_IN;
260 break;
261 case 1:
262 c = ls > 0xff ? us | 0x80 : us;
263 if (lcase & KICONV_FROM_LOWER && c != tolower(c)) {
264 table[us] |= (u_char)tolower(c) << 16;
265 table[us] |= XLAT16_HAS_FROM_LOWER_CASE;
266 }
267 if (lcase & KICONV_FROM_UPPER && c != toupper(c)) {
268 table[us] |= (u_char)toupper(c) << 16;
269 table[us] |= XLAT16_HAS_FROM_UPPER_CASE;
270 }
271 break;
272 }
273
274 if (table[us] == 0)
275 continue;
276
277 /*
278 * store not NULL
279 */
280 xt.idx[ls] = table;
281 }
282 if (xt.idx[ls]) {
283 memcpy(p, table, sizeof(table));
284 p += sizeof(table);
285 }
286 }
287 my_iconv_close(cd);
288
289 xt.size = p - (char *)xt.data;
290 xt.data = realloc(xt.data, xt.size);
291 return (xt);
292 }
293
294 static int
chklocale(int category,const char * code)295 chklocale(int category, const char *code)
296 {
297 char *p;
298 int error = -1;
299
300 p = strchr(setlocale(category, NULL), '.');
301 if (p++) {
302 error = strcasecmp(code, p);
303 if (error) {
304 /* XXX - can't avoid calling quirk here... */
305 error = strcasecmp(code, kiconv_quirkcs(p,
306 KICONV_VENDOR_MICSFT));
307 }
308 }
309 return (error);
310 }
311
312 static size_t
my_iconv_char(iconv_t cd,u_char ** ibuf,size_t * ilen,u_char ** obuf,size_t * olen)313 my_iconv_char(iconv_t cd, u_char **ibuf, size_t * ilen, u_char **obuf,
314 size_t * olen)
315 {
316 u_char *sp, *dp, ilocal[3], olocal[3];
317 u_char c1, c2;
318 int ret;
319 size_t ir, or;
320
321 sp = *ibuf;
322 dp = *obuf;
323 ir = *ilen;
324
325 bzero(*obuf, *olen);
326 ret = my_iconv(cd, (char **)&sp, ilen, (char **)&dp, olen);
327 c1 = (*obuf)[0];
328 c2 = (*obuf)[1];
329
330 if (ret == -1) {
331 if (*ilen == ir - 1 && (*ibuf)[1] == '\0' && (c1 || c2))
332 return (0);
333 else
334 return (-1);
335 }
336
337 /*
338 * We must judge if inbuf is a single byte char or double byte char.
339 * Here, to judge, try first byte(*sp) conversion and compare.
340 */
341 ir = 1;
342 or = 3;
343
344 bzero(olocal, or);
345 memcpy(ilocal, *ibuf, sizeof(ilocal));
346 sp = ilocal;
347 dp = olocal;
348
349 if ((my_iconv(cd, (char **)&sp, &ir, (char **)&dp, &or)) !=
350 (size_t)-1) {
351 if (olocal[0] != c1)
352 return (ret);
353
354 if (olocal[1] == c2 && (*ibuf)[1] == '\0') {
355 /*
356 * inbuf is a single byte char
357 */
358 *ilen = 1;
359 *olen = or;
360 return (ret);
361 }
362
363 switch(or) {
364 case 0:
365 case 1:
366 if (olocal[1] == c2) {
367 /*
368 * inbuf is a single byte char,
369 * so return false here.
370 */
371 return (-1);
372 } else {
373 /*
374 * inbuf is a double byte char
375 */
376 return (ret);
377 }
378 break;
379 case 2:
380 /*
381 * should compare second byte of inbuf
382 */
383 break;
384 }
385 } else {
386 /*
387 * inbuf clould not be splitted, so inbuf is
388 * a double byte char.
389 */
390 return (ret);
391 }
392
393 /*
394 * try second byte(*(sp+1)) conversion, and compare
395 */
396 ir = 1;
397 or = 3;
398
399 bzero(olocal, or);
400
401 sp = ilocal + 1;
402 dp = olocal;
403
404 if ((my_iconv(cd,(char **)&sp, &ir, (char **)&dp, &or)) !=
405 (size_t)-1) {
406 if (olocal[0] == c2)
407 /*
408 * inbuf is a single byte char
409 */
410 return (-1);
411 }
412
413 return (ret);
414 }
415
416 #else /* statically linked */
417
418 #include <sys/types.h>
419 #include <sys/iconv.h>
420 #include <errno.h>
421
422 int
kiconv_add_xlat16_cspair(const char * tocode __unused,const char * fromcode __unused,int flag __unused)423 kiconv_add_xlat16_cspair(const char *tocode __unused, const char *fromcode __unused,
424 int flag __unused)
425 {
426
427 errno = EINVAL;
428 return (-1);
429 }
430
431 int
kiconv_add_xlat16_cspairs(const char * tocode __unused,const char * fromcode __unused)432 kiconv_add_xlat16_cspairs(const char *tocode __unused, const char *fromcode __unused)
433 {
434 errno = EINVAL;
435 return (-1);
436 }
437
438 #endif /* PIC */
439