Remove some duplicate FreeBSD CVS IDs, move some IDs to better places.
[dragonfly.git] / sys / libiconv / iconv.c
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1/*
2 * Copyright (c) 2000-2001, Boris Popov
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 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Boris Popov.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * $FreeBSD: src/sys/libkern/iconv.c,v 1.1.2.1 2001/05/21 08:28:07 bp Exp $
b4f5425e 33 * $DragonFly: src/sys/libiconv/iconv.c,v 1.4 2004/04/01 08:41:24 joerg Exp $
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34 */
35#include <sys/param.h>
36#include <sys/systm.h>
37#include <sys/kernel.h>
38#include <sys/iconv.h>
39#include <sys/malloc.h>
40
41#include "iconv_converter_if.h"
42
43SYSCTL_DECL(_kern_iconv);
44
45SYSCTL_NODE(_kern, OID_AUTO, iconv, CTLFLAG_RW, NULL, "kernel iconv interface");
46
47MALLOC_DEFINE(M_ICONV, "ICONV", "ICONV structures");
48MALLOC_DEFINE(M_ICONVDATA, "ICONV data", "ICONV data");
49
50MODULE_VERSION(libiconv, 1);
51
52#ifdef notnow
53/*
54 * iconv converter instance
55 */
56struct iconv_converter {
57 KOBJ_FIELDS;
58 void * c_data;
59};
60#endif
61
62struct sysctl_oid *iconv_oid_hook = &sysctl___kern_iconv;
63
64/*
65 * List of loaded converters
66 */
67static TAILQ_HEAD(iconv_converter_list, iconv_converter_class)
68 iconv_converters = TAILQ_HEAD_INITIALIZER(iconv_converters);
69
70/*
71 * List of supported/loaded charsets pairs
72 */
73static TAILQ_HEAD(, iconv_cspair)
74 iconv_cslist = TAILQ_HEAD_INITIALIZER(iconv_cslist);
75static int iconv_csid = 1;
76
77static char iconv_unicode_string[] = "unicode"; /* save eight bytes when possible */
78
79static void iconv_unregister_cspair(struct iconv_cspair *csp);
80
81static int
82iconv_mod_unload(void)
83{
84 struct iconv_cspair *csp;
85
86 while ((csp = TAILQ_FIRST(&iconv_cslist)) != NULL) {
87 if (csp->cp_refcount)
88 return EBUSY;
89 iconv_unregister_cspair(csp);
90 }
91 return 0;
92}
93
94static int
95iconv_mod_handler(module_t mod, int type, void *data)
96{
97 int error;
98
99 switch (type) {
100 case MOD_LOAD:
101 error = 0;
102 break;
103 case MOD_UNLOAD:
104 error = iconv_mod_unload();
105 break;
106 default:
107 error = EINVAL;
108 }
109 return error;
110}
111
112static moduledata_t iconv_mod = {
113 "iconv", iconv_mod_handler, NULL
114};
115
116DECLARE_MODULE(iconv, iconv_mod, SI_SUB_DRIVERS, SI_ORDER_SECOND);
117
118static int
119iconv_register_converter(struct iconv_converter_class *dcp)
120{
b4f5425e 121 kobj_class_instantiate((kobj_class_t)dcp);
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122 TAILQ_INSERT_TAIL(&iconv_converters, dcp, cc_link);
123 return 0;
124}
125
126static int
127iconv_unregister_converter(struct iconv_converter_class *dcp)
128{
b4f5425e 129 if (dcp->refs != 1) {
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130 ICDEBUG("converter have %d referenses left\n", dcp->refs);
131 return EBUSY;
132 }
133 TAILQ_REMOVE(&iconv_converters, dcp, cc_link);
b4f5425e 134 kobj_class_uninstantiate((kobj_class_t)dcp);
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135 return 0;
136}
137
138static int
139iconv_lookupconv(const char *name, struct iconv_converter_class **dcpp)
140{
141 struct iconv_converter_class *dcp;
142
143 TAILQ_FOREACH(dcp, &iconv_converters, cc_link) {
144 if (name == NULL)
145 continue;
146 if (strcmp(name, ICONV_CONVERTER_NAME(dcp)) == 0) {
147 if (dcpp)
148 *dcpp = dcp;
149 return 0;
150 }
151 }
152 return ENOENT;
153}
154
155static int
156iconv_lookupcs(const char *to, const char *from, struct iconv_cspair **cspp)
157{
158 struct iconv_cspair *csp;
159
160 TAILQ_FOREACH(csp, &iconv_cslist, cp_link) {
161 if (strcmp(csp->cp_to, to) == 0 &&
162 strcmp(csp->cp_from, from) == 0) {
163 if (cspp)
164 *cspp = csp;
165 return 0;
166 }
167 }
168 return ENOENT;
169}
170
171static int
172iconv_register_cspair(const char *to, const char *from,
173 struct iconv_converter_class *dcp, void *data,
174 struct iconv_cspair **cspp)
175{
176 struct iconv_cspair *csp;
177 char *cp;
178 int csize, ucsto, ucsfrom;
179
180 if (iconv_lookupcs(to, from, NULL) == 0)
181 return EEXIST;
182 csize = sizeof(*csp);
183 ucsto = strcmp(to, iconv_unicode_string) == 0;
184 if (!ucsto)
185 csize += strlen(to) + 1;
186 ucsfrom = strcmp(from, iconv_unicode_string) == 0;
187 if (!ucsfrom)
188 csize += strlen(from) + 1;
189 csp = malloc(csize, M_ICONV, M_WAITOK);
190 bzero(csp, csize);
191 csp->cp_id = iconv_csid++;
192 csp->cp_dcp = dcp;
193 cp = (char*)(csp + 1);
194 if (!ucsto) {
195 strcpy(cp, to);
196 csp->cp_to = cp;
197 cp += strlen(cp) + 1;
198 } else
199 csp->cp_to = iconv_unicode_string;
200 if (!ucsfrom) {
201 strcpy(cp, from);
202 csp->cp_from = cp;
203 } else
204 csp->cp_from = iconv_unicode_string;
205 csp->cp_data = data;
206
207 TAILQ_INSERT_TAIL(&iconv_cslist, csp, cp_link);
208 *cspp = csp;
209 return 0;
210}
211
212static void
213iconv_unregister_cspair(struct iconv_cspair *csp)
214{
215 TAILQ_REMOVE(&iconv_cslist, csp, cp_link);
216 if (csp->cp_data)
217 free(csp->cp_data, M_ICONVDATA);
218 free(csp, M_ICONV);
219}
220
221/*
222 * Lookup and create an instance of converter.
223 * Currently this layer didn't have associated 'instance' structure
224 * to avoid unnesessary memory allocation.
225 */
226int
227iconv_open(const char *to, const char *from, void **handle)
228{
229 struct iconv_cspair *csp, *cspfrom, *cspto;
230 struct iconv_converter_class *dcp;
231 const char *cnvname;
232 int error;
233
234 /*
235 * First, lookup fully qualified cspairs
236 */
237 error = iconv_lookupcs(to, from, &csp);
238 if (error == 0)
239 return ICONV_CONVERTER_OPEN(csp->cp_dcp, csp, NULL, handle);
240
241 /*
242 * Well, nothing found. Now try to construct a composite conversion
243 * ToDo: add a 'capability' field to converter
244 */
245 TAILQ_FOREACH(dcp, &iconv_converters, cc_link) {
246 cnvname = ICONV_CONVERTER_NAME(dcp);
247 if (cnvname == NULL)
248 continue;
249 error = iconv_lookupcs(cnvname, from, &cspfrom);
250 if (error)
251 continue;
252 error = iconv_lookupcs(to, cnvname, &cspto);
253 if (error)
254 continue;
255 /*
256 * Fine, we're found a pair which can be combined together
257 */
258 return ICONV_CONVERTER_OPEN(dcp, cspto, cspfrom, handle);
259 }
260 return ENOENT;
261}
262
263int
264iconv_close(void *handle)
265{
266 return ICONV_CONVERTER_CLOSE(handle);
267}
268
269int
270iconv_conv(void *handle, const char **inbuf,
271 size_t *inbytesleft, char **outbuf, size_t *outbytesleft)
272{
273 return ICONV_CONVERTER_CONV(handle, inbuf, inbytesleft, outbuf, outbytesleft);
274}
275
276/*
277 * Give a list of loaded converters. Each name terminated with 0.
278 * An empty string terminates the list.
279 */
280static int
281iconv_sysctl_drvlist(SYSCTL_HANDLER_ARGS)
282{
283 struct iconv_converter_class *dcp;
284 const char *name;
285 char spc;
286 int error;
287
288 error = 0;
289
290 TAILQ_FOREACH(dcp, &iconv_converters, cc_link) {
291 name = ICONV_CONVERTER_NAME(dcp);
292 if (name == NULL)
293 continue;
294 error = SYSCTL_OUT(req, name, strlen(name) + 1);
295 if (error)
296 break;
297 }
298 if (error)
299 return error;
300 spc = 0;
301 error = SYSCTL_OUT(req, &spc, sizeof(spc));
302 return error;
303}
304
305SYSCTL_PROC(_kern_iconv, OID_AUTO, drvlist, CTLFLAG_RD | CTLTYPE_OPAQUE,
306 NULL, 0, iconv_sysctl_drvlist, "S,xlat", "registered converters");
307
308/*
309 * List all available charset pairs.
310 */
311static int
312iconv_sysctl_cslist(SYSCTL_HANDLER_ARGS)
313{
314 struct iconv_cspair *csp;
315 struct iconv_cspair_info csi;
316 int error;
317
318 error = 0;
319 bzero(&csi, sizeof(csi));
320 csi.cs_version = ICONV_CSPAIR_INFO_VER;
321
322 TAILQ_FOREACH(csp, &iconv_cslist, cp_link) {
323 csi.cs_id = csp->cp_id;
324 csi.cs_refcount = csp->cp_refcount;
325 csi.cs_base = csp->cp_base ? csp->cp_base->cp_id : 0;
326 strcpy(csi.cs_to, csp->cp_to);
327 strcpy(csi.cs_from, csp->cp_from);
328 error = SYSCTL_OUT(req, &csi, sizeof(csi));
329 if (error)
330 break;
331 }
332 return error;
333}
334
335SYSCTL_PROC(_kern_iconv, OID_AUTO, cslist, CTLFLAG_RD | CTLTYPE_OPAQUE,
336 NULL, 0, iconv_sysctl_cslist, "S,xlat", "registered charset pairs");
337
338/*
339 * Add new charset pair
340 */
341static int
342iconv_sysctl_add(SYSCTL_HANDLER_ARGS)
343{
344 struct iconv_converter_class *dcp;
345 struct iconv_cspair *csp;
346 struct iconv_add_in din;
347 struct iconv_add_out dout;
348 int error;
349
350 error = SYSCTL_IN(req, &din, sizeof(din));
351 if (error)
352 return error;
353 if (din.ia_version != ICONV_ADD_VER)
354 return EINVAL;
355 if (din.ia_datalen > ICONV_CSMAXDATALEN)
356 return EINVAL;
357 if (iconv_lookupconv(din.ia_converter, &dcp) != 0)
358 return EINVAL;
359 error = iconv_register_cspair(din.ia_to, din.ia_from, dcp, NULL, &csp);
360 if (error)
361 return error;
362 if (din.ia_datalen) {
363 csp->cp_data = malloc(din.ia_datalen, M_ICONVDATA, M_WAITOK);
364 error = copyin(din.ia_data, csp->cp_data, din.ia_datalen);
365 if (error)
366 goto bad;
367 }
368 dout.ia_csid = csp->cp_id;
369 error = SYSCTL_OUT(req, &dout, sizeof(dout));
370 if (error)
371 goto bad;
372 return 0;
373bad:
374 iconv_unregister_cspair(csp);
375 return error;
376}
377
378SYSCTL_PROC(_kern_iconv, OID_AUTO, add, CTLFLAG_RW | CTLTYPE_OPAQUE,
379 NULL, 0, iconv_sysctl_add, "S,xlat", "register charset pair");
380
381/*
382 * Default stubs for converters
383 */
384int
385iconv_converter_initstub(struct iconv_converter_class *dp)
386{
387 return 0;
388}
389
390int
391iconv_converter_donestub(struct iconv_converter_class *dp)
392{
393 return 0;
394}
395
396int
397iconv_converter_handler(module_t mod, int type, void *data)
398{
399 struct iconv_converter_class *dcp = data;
400 int error;
401
402 switch (type) {
403 case MOD_LOAD:
404 error = iconv_register_converter(dcp);
405 if (error)
406 break;
407 error = ICONV_CONVERTER_INIT(dcp);
408 if (error)
409 iconv_unregister_converter(dcp);
410 break;
411 case MOD_UNLOAD:
412 ICONV_CONVERTER_DONE(dcp);
413 error = iconv_unregister_converter(dcp);
414 break;
415 default:
416 error = EINVAL;
417 }
418 return error;
419}
420
421/*
422 * Common used functions
423 */
424char *
425iconv_convstr(void *handle, char *dst, const char *src)
426{
427 char *p = dst;
428 int inlen, outlen, error;
429
430 if (handle == NULL) {
431 strcpy(dst, src);
432 return dst;
433 }
434 inlen = outlen = strlen(src);
435 error = iconv_conv(handle, NULL, NULL, &p, &outlen);
436 if (error)
437 return NULL;
438 error = iconv_conv(handle, &src, &inlen, &p, &outlen);
439 if (error)
440 return NULL;
441 *p = 0;
442 return dst;
443}
444
445void *
446iconv_convmem(void *handle, void *dst, const void *src, int size)
447{
448 const char *s = src;
449 char *d = dst;
450 int inlen, outlen, error;
451
452 if (size == 0)
453 return dst;
454 if (handle == NULL) {
455 memcpy(dst, src, size);
456 return dst;
457 }
458 inlen = outlen = size;
459 error = iconv_conv(handle, NULL, NULL, &d, &outlen);
460 if (error)
461 return NULL;
462 error = iconv_conv(handle, &s, &inlen, &d, &outlen);
463 if (error)
464 return NULL;
465 return dst;
466}
467
468int
469iconv_lookupcp(char **cpp, const char *s)
470{
471 if (cpp == NULL) {
472 ICDEBUG("warning a NULL list passed\n");
473 return ENOENT;
474 }
475 for (; *cpp; cpp++)
476 if (strcmp(*cpp, s) == 0)
477 return 0;
478 return ENOENT;
479}