1 /* $FreeBSD: head/lib/libc/iconv/citrus_esdb.c 219019 2011-02-25 00:04:39Z gabor $ */
2 /* $NetBSD: citrus_esdb.c,v 1.5 2008/02/09 14:56:20 junyoung Exp $ */
3
4 /*-
5 * Copyright (c)2003 Citrus Project,
6 * All rights reserved.
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 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 #include <sys/types.h>
32
33 #include <assert.h>
34 #include <errno.h>
35 #include <limits.h>
36 #include <paths.h>
37 #include <stdbool.h>
38 #include <stdio.h>
39 #include <stdlib.h>
40 #include <string.h>
41
42 #include "citrus_namespace.h"
43 #include "citrus_types.h"
44 #include "citrus_bcs.h"
45 #include "citrus_region.h"
46 #include "citrus_memstream.h"
47 #include "citrus_mmap.h"
48 #include "citrus_lookup.h"
49 #include "citrus_db.h"
50 #include "citrus_db_hash.h"
51 #include "citrus_esdb.h"
52 #include "citrus_esdb_file.h"
53
54 #define ESDB_DIR "esdb.dir"
55 #define ESDB_ALIAS "esdb.alias"
56
57 /*
58 * _citrus_esdb_alias:
59 * resolve encoding scheme name aliases.
60 */
61 const char *
_citrus_esdb_alias(const char * esname,char * buf,size_t bufsize)62 _citrus_esdb_alias(const char *esname, char *buf, size_t bufsize)
63 {
64
65 return (_lookup_alias(_PATH_ESDB "/" ESDB_ALIAS, esname, buf, bufsize,
66 _LOOKUP_CASE_IGNORE));
67 }
68
69
70 /*
71 * conv_esdb:
72 * external representation -> local structure.
73 */
74 static int
conv_esdb(struct _citrus_esdb * esdb,struct _region * fr)75 conv_esdb(struct _citrus_esdb *esdb, struct _region *fr)
76 {
77 struct _citrus_db *db;
78 const char *str;
79 char buf[100];
80 uint32_t csid, i, num_charsets, tmp, version;
81 int ret;
82
83 /* open db */
84 ret = _db_open(&db, fr, _CITRUS_ESDB_MAGIC, &_db_hash_std, NULL);
85 if (ret)
86 goto err0;
87
88 /* check version */
89 ret = _db_lookup32_by_s(db, _CITRUS_ESDB_SYM_VERSION, &version, NULL);
90 if (ret)
91 goto err1;
92 switch (version) {
93 case 0x00000001:
94 /* current version */
95 /* initial version */
96 break;
97 default:
98 ret = EFTYPE;
99 goto err1;
100 }
101
102 /* get encoding/variable */
103 ret = _db_lookupstr_by_s(db, _CITRUS_ESDB_SYM_ENCODING, &str, NULL);
104 if (ret)
105 goto err1;
106 esdb->db_encname = strdup(str);
107 if (esdb->db_encname == NULL) {
108 ret = errno;
109 goto err1;
110 }
111
112 esdb->db_len_variable = 0;
113 esdb->db_variable = NULL;
114 ret = _db_lookupstr_by_s(db, _CITRUS_ESDB_SYM_VARIABLE, &str, NULL);
115 if (ret == 0) {
116 esdb->db_len_variable = strlen(str) + 1;
117 esdb->db_variable = strdup(str);
118 if (esdb->db_variable == NULL) {
119 ret = errno;
120 goto err2;
121 }
122 } else if (ret != ENOENT)
123 goto err2;
124
125 /* get number of charsets */
126 ret = _db_lookup32_by_s(db, _CITRUS_ESDB_SYM_NUM_CHARSETS,
127 &num_charsets, NULL);
128 if (ret)
129 goto err3;
130 esdb->db_num_charsets = num_charsets;
131
132 /* get invalid character */
133 ret = _db_lookup32_by_s(db, _CITRUS_ESDB_SYM_INVALID, &tmp, NULL);
134 if (ret == 0) {
135 esdb->db_use_invalid = 1;
136 esdb->db_invalid = tmp;
137 } else if (ret == ENOENT)
138 esdb->db_use_invalid = 0;
139 else
140 goto err3;
141
142 /* get charsets */
143 esdb->db_charsets = malloc(num_charsets * sizeof(*esdb->db_charsets));
144 if (esdb->db_charsets == NULL) {
145 ret = errno;
146 goto err3;
147 }
148 for (i = 0; i < num_charsets; i++) {
149 snprintf(buf, sizeof(buf),
150 _CITRUS_ESDB_SYM_CSID_PREFIX "%d", i);
151 ret = _db_lookup32_by_s(db, buf, &csid, NULL);
152 if (ret)
153 goto err4;
154 esdb->db_charsets[i].ec_csid = csid;
155
156 snprintf(buf, sizeof(buf),
157 _CITRUS_ESDB_SYM_CSNAME_PREFIX "%d", i);
158 ret = _db_lookupstr_by_s(db, buf, &str, NULL);
159 if (ret)
160 goto err4;
161 esdb->db_charsets[i].ec_csname = strdup(str);
162 if (esdb->db_charsets[i].ec_csname == NULL) {
163 ret = errno;
164 goto err4;
165 }
166 }
167
168 _db_close(db);
169 return (0);
170
171 err4:
172 for (; i > 0; i--)
173 free(esdb->db_charsets[i - 1].ec_csname);
174 free(esdb->db_charsets);
175 err3:
176 free(esdb->db_variable);
177 err2:
178 free(esdb->db_encname);
179 err1:
180 _db_close(db);
181 if (ret == ENOENT)
182 ret = EFTYPE;
183 err0:
184 return (ret);
185 }
186
187 /*
188 * _citrus_esdb_open:
189 * open an ESDB file.
190 */
191 int
_citrus_esdb_open(struct _citrus_esdb * db,const char * esname)192 _citrus_esdb_open(struct _citrus_esdb *db, const char *esname)
193 {
194 struct _region fr;
195 const char *realname, *encfile;
196 char buf1[PATH_MAX], buf2[PATH_MAX], path[PATH_MAX];
197 int ret;
198
199 snprintf(path, sizeof(path), "%s/%s", _PATH_ESDB, ESDB_ALIAS);
200 realname = _lookup_alias(path, esname, buf1, sizeof(buf1),
201 _LOOKUP_CASE_IGNORE);
202
203 snprintf(path, sizeof(path), "%s/%s", _PATH_ESDB, ESDB_DIR);
204 encfile = _lookup_simple(path, realname, buf2, sizeof(buf2),
205 _LOOKUP_CASE_IGNORE);
206 if (encfile == NULL)
207 return (ENOENT);
208
209 /* open file */
210 snprintf(path, sizeof(path), "%s/%s", _PATH_ESDB, encfile);
211 ret = _map_file(&fr, path);
212 if (ret)
213 return (ret);
214
215 ret = conv_esdb(db, &fr);
216
217 _unmap_file(&fr);
218
219 return (ret);
220 }
221
222 /*
223 * _citrus_esdb_close:
224 * free an ESDB.
225 */
226 void
_citrus_esdb_close(struct _citrus_esdb * db)227 _citrus_esdb_close(struct _citrus_esdb *db)
228 {
229
230 for (int i = 0; i < db->db_num_charsets; i++)
231 free(db->db_charsets[i].ec_csname);
232 db->db_num_charsets = 0;
233 free(db->db_charsets); db->db_charsets = NULL;
234 free(db->db_encname); db->db_encname = NULL;
235 db->db_len_variable = 0;
236 free(db->db_variable); db->db_variable = NULL;
237 }
238
239 /*
240 * _citrus_esdb_free_list:
241 * free the list.
242 */
243 void
_citrus_esdb_free_list(char ** list,size_t num)244 _citrus_esdb_free_list(char **list, size_t num)
245 {
246
247 for (size_t i = 0; i < num; i++)
248 free(list[i]);
249 free(list);
250 }
251
252 /*
253 * _citrus_esdb_get_list:
254 * get esdb entries.
255 */
256 int
_citrus_esdb_get_list(char *** rlist,size_t * rnum,bool sorted)257 _citrus_esdb_get_list(char ***rlist, size_t *rnum, bool sorted)
258 {
259 struct _citrus_lookup *cla, *cld;
260 struct _region key, data;
261 char **list, **q;
262 char buf[PATH_MAX];
263 size_t num;
264 int ret;
265
266 num = 0;
267
268 ret = _lookup_seq_open(&cla, _PATH_ESDB "/" ESDB_ALIAS,
269 _LOOKUP_CASE_IGNORE);
270 if (ret)
271 goto quit0;
272
273 ret = _lookup_seq_open(&cld, _PATH_ESDB "/" ESDB_DIR,
274 _LOOKUP_CASE_IGNORE);
275 if (ret)
276 goto quit1;
277
278 /* count number of entries */
279 num = _lookup_get_num_entries(cla) + _lookup_get_num_entries(cld);
280
281 _lookup_seq_rewind(cla);
282 _lookup_seq_rewind(cld);
283
284 /* allocate list pointer space */
285 list = malloc(num * sizeof(char *));
286 num = 0;
287 if (list == NULL) {
288 ret = errno;
289 goto quit3;
290 }
291
292 /* get alias entries */
293 while ((ret = _lookup_seq_next(cla, &key, &data)) == 0) {
294 if (sorted)
295 snprintf(buf, sizeof(buf), "%.*s/%.*s",
296 (int)_region_size(&data),
297 (const char *)_region_head(&data),
298 (int)_region_size(&key),
299 (const char *)_region_head(&key));
300 else
301 snprintf(buf, sizeof(buf), "%.*s/%.*s",
302 (int)_region_size(&data),
303 (const char *)_region_head(&data),
304 (int)_region_size(&key),
305 (const char *)_region_head(&key));
306 _bcs_convert_to_upper(buf);
307 list[num] = strdup(buf);
308 if (list[num] == NULL) {
309 ret = errno;
310 goto quit3;
311 }
312 num++;
313 }
314 if (ret != ENOENT)
315 goto quit3;
316 /* get dir entries */
317 while ((ret = _lookup_seq_next(cld, &key, &data)) == 0) {
318 if (!sorted)
319 snprintf(buf, sizeof(buf), "%.*s",
320 (int)_region_size(&key),
321 (const char *)_region_head(&key));
322 else {
323 /* check duplicated entry */
324 char *p;
325 char buf1[PATH_MAX];
326
327 snprintf(buf1, sizeof(buf1), "%.*s",
328 (int)_region_size(&data),
329 (const char *)_region_head(&data));
330 if ((p = strchr(buf1, '/')) != NULL)
331 memcpy(buf1, p + 1, strlen(p) - 1);
332 if ((p = strstr(buf1, ".esdb")) != NULL)
333 *p = '\0';
334 snprintf(buf, sizeof(buf), "%s/%.*s", buf1,
335 (int)_region_size(&key),
336 (const char *)_region_head(&key));
337 }
338 _bcs_convert_to_upper(buf);
339 ret = _lookup_seq_lookup(cla, buf, NULL);
340 if (ret) {
341 if (ret != ENOENT)
342 goto quit3;
343 /* not duplicated */
344 list[num] = strdup(buf);
345 if (list[num] == NULL) {
346 ret = errno;
347 goto quit3;
348 }
349 num++;
350 }
351 }
352 if (ret != ENOENT)
353 goto quit3;
354
355 ret = 0;
356 /* XXX: why reallocing the list space posteriorly?
357 shouldn't be done earlier? */
358 q = realloc(list, num * sizeof(char *));
359 if (!q) {
360 ret = ENOMEM;
361 goto quit3;
362 }
363 list = q;
364 *rlist = list;
365 *rnum = num;
366 quit3:
367 if (ret)
368 _citrus_esdb_free_list(list, num);
369 _lookup_seq_close(cld);
370 quit1:
371 _lookup_seq_close(cla);
372 quit0:
373 return (ret);
374 }
375