]> CyberLeo.Net >> Repos - FreeBSD/releng/7.2.git/blob - lib/libkiconv/xlat16_iconv.c
Create releng/7.2 from stable/7 in preparation for 7.2-RELEASE.
[FreeBSD/releng/7.2.git] / lib / libkiconv / xlat16_iconv.c
1 /*-
2  * Copyright (c) 2003 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  * $FreeBSD$
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 <stdio.h>
45 #include <stdlib.h>
46 #include <string.h>
47
48 #include "quirks.h"
49
50 typedef void *iconv_t;
51
52 struct xlat16_table {
53         uint32_t *      idx[0x200];
54         void *          data;
55         size_t          size;
56 };
57
58 static struct xlat16_table kiconv_xlat16_open(const char *, const char *, int);
59
60 static int my_iconv_init(void);
61 static iconv_t (*my_iconv_open)(const char *, const char *);
62 static size_t (*my_iconv)(iconv_t, const char **, size_t *, char **, size_t *);
63 static int (*my_iconv_close)(iconv_t);
64 static size_t my_iconv_char(iconv_t, const u_char **, size_t *, u_char **, size_t *);
65
66 int
67 kiconv_add_xlat16_cspair(const char *tocode, const char *fromcode, int flag)
68 {
69         int error;
70         size_t i, size, idxsize;
71         struct iconv_cspair_info *csi;
72         struct xlat16_table xt;
73         void *data;
74         char *p;
75
76         if (sysctlbyname("kern.iconv.cslist", NULL, &size, NULL, 0) == -1)
77                 return (-1);
78         if (size > 0) {
79                 csi = malloc(size);
80                 if (csi == NULL)
81                         return (-1);
82                 if (sysctlbyname("kern.iconv.cslist", csi, &size, NULL, 0) == -1) {
83                         free(csi);
84                         return (-1);
85                 }
86                 for (i = 0; i < (size/sizeof(*csi)); i++, csi++){
87                         if (strcmp(csi->cs_to, tocode) == 0 &&
88                             strcmp(csi->cs_from, fromcode) == 0)
89                                 return (0);
90                 }
91         }
92
93         xt = kiconv_xlat16_open(tocode, fromcode, flag);
94         if (xt.size == 0)
95                 return (-1);
96
97         idxsize = sizeof(xt.idx);
98
99         if ((idxsize + xt.size) > ICONV_CSMAXDATALEN) {
100                 errno = E2BIG;
101                 return (-1);
102         }
103
104         if ((data = malloc(idxsize + xt.size)) != NULL) {
105                 p = data;
106                 memcpy(p, xt.idx, idxsize);
107                 p += idxsize;
108                 memcpy(p, xt.data, xt.size);
109                 error = kiconv_add_xlat16_table(tocode, fromcode, data,
110                     (int)(idxsize + xt.size));
111                 return (error);
112         }
113
114         return (-1);
115 }
116
117 int
118 kiconv_add_xlat16_cspairs(const char *foreigncode, const char *localcode)
119 {
120         int error;
121
122         error = kiconv_add_xlat16_cspair(foreigncode, localcode,
123             KICONV_FROM_LOWER | KICONV_FROM_UPPER);
124         if (error)
125                 return (error);
126         error = kiconv_add_xlat16_cspair(localcode, foreigncode,
127             KICONV_LOWER | KICONV_UPPER);
128         if (error)
129                 return (error);
130         
131         return (0);
132 }
133
134 static struct xlat16_table
135 kiconv_xlat16_open(const char *tocode, const char *fromcode, int lcase)
136 {
137         u_char src[3], dst[4], *srcp, *dstp, ud, ld;
138         int us, ls, ret;
139         uint16_t c;
140         uint32_t table[0x80];
141         size_t inbytesleft, outbytesleft, pre_q_size, post_q_size;
142         struct xlat16_table xt;
143         struct quirk_replace_list *pre_q_list, *post_q_list;
144         iconv_t cd;
145         char *p;
146
147         xt.data = NULL;
148         xt.size = 0;
149
150         src[2] = '\0';
151         dst[3] = '\0';
152
153         ret = my_iconv_init();
154         if (ret)
155                 return (xt);
156
157         cd = my_iconv_open(search_quirk(tocode, fromcode, &pre_q_list, &pre_q_size),
158             search_quirk(fromcode, tocode, &post_q_list, &post_q_size));
159         if (cd == (iconv_t) (-1))
160                 return (xt);
161
162         if ((xt.data = malloc(0x200 * 0x80 * sizeof(uint32_t))) == NULL)
163                 return (xt);
164
165         p = xt.data;
166
167         for (ls = 0 ; ls < 0x200 ; ls++) {
168                 xt.idx[ls] = NULL;
169                 for (us = 0 ; us < 0x80 ; us++) {
170                         srcp = src;
171                         dstp = dst;
172
173                         inbytesleft = 2;
174                         outbytesleft = 3;
175                         bzero(dst, outbytesleft);
176
177                         c = ((ls & 0x100 ? us | 0x80 : us) << 8) | (u_char)ls;
178                         c = quirk_vendor2unix(c, pre_q_list, pre_q_size);
179                         src[0] = (u_char)(c >> 8);
180                         src[1] = (u_char)c;
181
182                         ret = my_iconv_char(cd, (const u_char **)&srcp,
183                             &inbytesleft, &dstp, &outbytesleft);
184                         if (ret == -1) {
185                                 table[us] = 0;
186                                 continue;
187                         }
188
189                         ud = (u_char)dst[0];
190                         ld = (u_char)dst[1];
191
192                         switch(outbytesleft) {
193                         case 0:
194 #ifdef XLAT16_ACCEPT_3BYTE_CHR
195                                 table[us] = (ud << 8) | ld;
196                                 table[us] |= (u_char)dst[2] << 16;
197                                 table[us] |= XLAT16_IS_3BYTE_CHR;
198 #else
199                                 table[us] = 0;
200                                 continue;
201 #endif
202                                 break;
203                         case 1:
204                                 table[us] = quirk_unix2vendor((ud << 8) | ld,
205                                     post_q_list, post_q_size);
206                                 if ((table[us] >> 8) == 0)
207                                         table[us] |= XLAT16_ACCEPT_NULL_OUT;
208                                 break;
209                         case 2:
210                                 table[us] = ud;
211                                 if (lcase & KICONV_LOWER && ud != tolower(ud)) {
212                                         table[us] |= (u_char)tolower(ud) << 16;
213                                         table[us] |= XLAT16_HAS_LOWER_CASE;
214                                 }
215                                 if (lcase & KICONV_UPPER && ud != toupper(ud)) {
216                                         table[us] |= (u_char)toupper(ud) << 16;
217                                         table[us] |= XLAT16_HAS_UPPER_CASE;
218                                 }
219                                 break;
220                         }
221
222                         switch(inbytesleft) {
223                         case 0:
224                                 if ((ls & 0xff) == 0)
225                                         table[us] |= XLAT16_ACCEPT_NULL_IN;
226                                 break;
227                         case 1:
228                                 c = ls > 0xff ? us | 0x80 : us;
229                                 if (lcase & KICONV_FROM_LOWER && c != tolower(c)) {
230                                         table[us] |= (u_char)tolower(c) << 16;
231                                         table[us] |= XLAT16_HAS_FROM_LOWER_CASE;
232                                 }
233                                 if (lcase & KICONV_FROM_UPPER && c != toupper(c)) {
234                                         table[us] |= (u_char)toupper(c) << 16;
235                                         table[us] |= XLAT16_HAS_FROM_UPPER_CASE;
236                                 }
237                                 break;
238                         }
239
240                         if (table[us] == 0)
241                                 continue;
242
243                         /*
244                          * store not NULL
245                          */
246                         xt.idx[ls] = table;
247                 }
248                 if (xt.idx[ls]) {
249                         memcpy(p, table, sizeof(table));
250                         p += sizeof(table);
251                 }
252         }
253         my_iconv_close(cd);
254
255         xt.size = p - (char *)xt.data;
256         xt.data = realloc(xt.data, xt.size);
257         return (xt);
258 }
259
260 static int
261 my_iconv_init(void)
262 {
263         void *iconv_lib;
264
265         iconv_lib = dlopen("libiconv.so", RTLD_LAZY | RTLD_GLOBAL);
266         if (iconv_lib == NULL) {
267                 warn("Unable to load iconv library: %s\n", dlerror());
268                 errno = ENOENT;
269                 return (-1);
270         }
271         my_iconv_open = dlsym(iconv_lib, "iconv_open");
272         my_iconv = dlsym(iconv_lib, "iconv");
273         my_iconv_close = dlsym(iconv_lib, "iconv_close");
274
275         return (0);
276 }
277
278 static size_t
279 my_iconv_char(iconv_t cd, const u_char **ibuf, size_t * ilen, u_char **obuf,
280         size_t * olen)
281 {
282         const u_char *sp;
283         u_char *dp, ilocal[3], olocal[3];
284         u_char c1, c2;
285         int ret;
286         size_t ir, or;
287
288         sp = *ibuf;
289         dp = *obuf;
290         ir = *ilen;
291
292         bzero(*obuf, *olen);
293         ret = my_iconv(cd, (const char **)&sp, ilen, (char **)&dp, olen);
294         c1 = (*obuf)[0];
295         c2 = (*obuf)[1];
296
297         if (ret == -1) {
298                 if (*ilen == ir - 1 && (*ibuf)[1] == '\0' && (c1 || c2))
299                         return (0);
300                 else
301                         return (-1);
302         }
303
304         /*
305          * We must judge if inbuf is a single byte char or double byte char.
306          * Here, to judge, try first byte(*sp) conversion and compare.
307          */
308         ir = 1;
309         or = 3;
310
311         bzero(olocal, or);
312         memcpy(ilocal, *ibuf, sizeof(ilocal));
313         sp = ilocal;
314         dp = olocal;
315
316         if ((my_iconv(cd,(const char **)&sp, &ir, (char **)&dp, &or)) != -1) {
317                 if (olocal[0] != c1)
318                         return (ret);
319
320                 if (olocal[1] == c2 && (*ibuf)[1] == '\0') {
321                         /*
322                          * inbuf is a single byte char
323                          */
324                         *ilen = 1;
325                         *olen = or;
326                         return (ret);
327                 }
328
329                 switch(or) {
330                 case 0:
331                 case 1:
332                         if (olocal[1] == c2) {
333                                 /*
334                                  * inbuf is a single byte char,
335                                  * so return false here.
336                                  */
337                                 return (-1);
338                         } else {
339                                 /*
340                                  * inbuf is a double byte char
341                                  */
342                                 return (ret);
343                         }
344                         break;
345                 case 2:
346                         /*
347                          * should compare second byte of inbuf
348                          */
349                         break;
350                 }
351         } else {
352                 /*
353                  * inbuf clould not be splitted, so inbuf is
354                  * a double byte char.
355                  */
356                 return (ret);
357         }
358
359         /*
360          * try second byte(*(sp+1)) conversion, and compare
361          */
362         ir = 1;
363         or = 3;
364
365         bzero(olocal, or);
366
367         sp = ilocal + 1;
368         dp = olocal;
369
370         if ((my_iconv(cd,(const char **)&sp, &ir, (char **)&dp, &or)) != -1) {
371                 if (olocal[0] == c2)
372                         /*
373                          * inbuf is a single byte char
374                          */
375                         return (-1);
376         }
377
378         return (ret);
379 }
380
381 #else /* statically linked */
382
383 #include <errno.h>
384
385 int
386 kiconv_add_xlat16_cspair(const char *tocode, const char *fromcode, int flag)
387 {
388         errno = EINVAL;
389         return (-1);
390 }
391
392 int
393 kiconv_add_xlat16_cspairs(const char *tocode, const char *fromcode)
394 {
395         errno = EINVAL;
396         return (-1);
397 }
398
399 #endif /* PIC */