AMD64 - Fix many compile-time warnings. int/ptr type mismatches, %llx, etc.
[dragonfly.git] / sys / libiconv / iconv.c
CommitLineData
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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 $
e7b4468c 33 * $DragonFly: src/sys/libiconv/iconv.c,v 1.8 2008/01/05 14:02:38 swildner 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) {
3f625015 130 ICDEBUG("converter has %d references left\n", dcp->refs);
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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;
e7b4468c 189 csp = kmalloc(csize, M_ICONV, M_WAITOK | M_ZERO);
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190 csp->cp_id = iconv_csid++;
191 csp->cp_dcp = dcp;
192 cp = (char*)(csp + 1);
193 if (!ucsto) {
194 strcpy(cp, to);
195 csp->cp_to = cp;
196 cp += strlen(cp) + 1;
197 } else
198 csp->cp_to = iconv_unicode_string;
199 if (!ucsfrom) {
200 strcpy(cp, from);
201 csp->cp_from = cp;
202 } else
203 csp->cp_from = iconv_unicode_string;
204 csp->cp_data = data;
205
206 TAILQ_INSERT_TAIL(&iconv_cslist, csp, cp_link);
207 *cspp = csp;
208 return 0;
209}
210
211static void
212iconv_unregister_cspair(struct iconv_cspair *csp)
213{
214 TAILQ_REMOVE(&iconv_cslist, csp, cp_link);
215 if (csp->cp_data)
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216 kfree(csp->cp_data, M_ICONVDATA);
217 kfree(csp, M_ICONV);
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218}
219
220/*
221 * Lookup and create an instance of converter.
222 * Currently this layer didn't have associated 'instance' structure
223 * to avoid unnesessary memory allocation.
224 */
225int
226iconv_open(const char *to, const char *from, void **handle)
227{
228 struct iconv_cspair *csp, *cspfrom, *cspto;
229 struct iconv_converter_class *dcp;
230 const char *cnvname;
231 int error;
232
233 /*
234 * First, lookup fully qualified cspairs
235 */
236 error = iconv_lookupcs(to, from, &csp);
237 if (error == 0)
238 return ICONV_CONVERTER_OPEN(csp->cp_dcp, csp, NULL, handle);
239
240 /*
241 * Well, nothing found. Now try to construct a composite conversion
242 * ToDo: add a 'capability' field to converter
243 */
244 TAILQ_FOREACH(dcp, &iconv_converters, cc_link) {
245 cnvname = ICONV_CONVERTER_NAME(dcp);
246 if (cnvname == NULL)
247 continue;
248 error = iconv_lookupcs(cnvname, from, &cspfrom);
249 if (error)
250 continue;
251 error = iconv_lookupcs(to, cnvname, &cspto);
252 if (error)
253 continue;
254 /*
255 * Fine, we're found a pair which can be combined together
256 */
257 return ICONV_CONVERTER_OPEN(dcp, cspto, cspfrom, handle);
258 }
259 return ENOENT;
260}
261
262int
263iconv_close(void *handle)
264{
265 return ICONV_CONVERTER_CLOSE(handle);
266}
267
268int
269iconv_conv(void *handle, const char **inbuf,
270 size_t *inbytesleft, char **outbuf, size_t *outbytesleft)
271{
272 return ICONV_CONVERTER_CONV(handle, inbuf, inbytesleft, outbuf, outbytesleft);
273}
274
275/*
276 * Give a list of loaded converters. Each name terminated with 0.
277 * An empty string terminates the list.
278 */
279static int
280iconv_sysctl_drvlist(SYSCTL_HANDLER_ARGS)
281{
282 struct iconv_converter_class *dcp;
283 const char *name;
284 char spc;
285 int error;
286
287 error = 0;
288
289 TAILQ_FOREACH(dcp, &iconv_converters, cc_link) {
290 name = ICONV_CONVERTER_NAME(dcp);
291 if (name == NULL)
292 continue;
293 error = SYSCTL_OUT(req, name, strlen(name) + 1);
294 if (error)
295 break;
296 }
297 if (error)
298 return error;
299 spc = 0;
300 error = SYSCTL_OUT(req, &spc, sizeof(spc));
301 return error;
302}
303
304SYSCTL_PROC(_kern_iconv, OID_AUTO, drvlist, CTLFLAG_RD | CTLTYPE_OPAQUE,
305 NULL, 0, iconv_sysctl_drvlist, "S,xlat", "registered converters");
306
307/*
308 * List all available charset pairs.
309 */
310static int
311iconv_sysctl_cslist(SYSCTL_HANDLER_ARGS)
312{
313 struct iconv_cspair *csp;
314 struct iconv_cspair_info csi;
315 int error;
316
317 error = 0;
318 bzero(&csi, sizeof(csi));
319 csi.cs_version = ICONV_CSPAIR_INFO_VER;
320
321 TAILQ_FOREACH(csp, &iconv_cslist, cp_link) {
322 csi.cs_id = csp->cp_id;
323 csi.cs_refcount = csp->cp_refcount;
324 csi.cs_base = csp->cp_base ? csp->cp_base->cp_id : 0;
325 strcpy(csi.cs_to, csp->cp_to);
326 strcpy(csi.cs_from, csp->cp_from);
327 error = SYSCTL_OUT(req, &csi, sizeof(csi));
328 if (error)
329 break;
330 }
331 return error;
332}
333
334SYSCTL_PROC(_kern_iconv, OID_AUTO, cslist, CTLFLAG_RD | CTLTYPE_OPAQUE,
335 NULL, 0, iconv_sysctl_cslist, "S,xlat", "registered charset pairs");
336
337/*
338 * Add new charset pair
339 */
340static int
341iconv_sysctl_add(SYSCTL_HANDLER_ARGS)
342{
343 struct iconv_converter_class *dcp;
344 struct iconv_cspair *csp;
345 struct iconv_add_in din;
346 struct iconv_add_out dout;
347 int error;
348
349 error = SYSCTL_IN(req, &din, sizeof(din));
350 if (error)
351 return error;
352 if (din.ia_version != ICONV_ADD_VER)
353 return EINVAL;
354 if (din.ia_datalen > ICONV_CSMAXDATALEN)
355 return EINVAL;
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356
357 /*
358 * Make sure all user-supplied strings are terminated before
359 * proceeding.
360 */
361 din.ia_converter[ICONV_CNVNMAXLEN-1] = 0;
362 din.ia_to[ICONV_CSNMAXLEN-1] = 0;
363 din.ia_from[ICONV_CSNMAXLEN-1] = 0;
364
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365 if (iconv_lookupconv(din.ia_converter, &dcp) != 0)
366 return EINVAL;
367 error = iconv_register_cspair(din.ia_to, din.ia_from, dcp, NULL, &csp);
368 if (error)
369 return error;
370 if (din.ia_datalen) {
efda3bd0 371 csp->cp_data = kmalloc(din.ia_datalen, M_ICONVDATA, M_WAITOK);
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372 error = copyin(din.ia_data, csp->cp_data, din.ia_datalen);
373 if (error)
374 goto bad;
375 }
376 dout.ia_csid = csp->cp_id;
377 error = SYSCTL_OUT(req, &dout, sizeof(dout));
378 if (error)
379 goto bad;
380 return 0;
381bad:
382 iconv_unregister_cspair(csp);
383 return error;
384}
385
386SYSCTL_PROC(_kern_iconv, OID_AUTO, add, CTLFLAG_RW | CTLTYPE_OPAQUE,
387 NULL, 0, iconv_sysctl_add, "S,xlat", "register charset pair");
388
389/*
390 * Default stubs for converters
391 */
392int
393iconv_converter_initstub(struct iconv_converter_class *dp)
394{
395 return 0;
396}
397
398int
399iconv_converter_donestub(struct iconv_converter_class *dp)
400{
401 return 0;
402}
403
404int
405iconv_converter_handler(module_t mod, int type, void *data)
406{
407 struct iconv_converter_class *dcp = data;
408 int error;
409
410 switch (type) {
411 case MOD_LOAD:
412 error = iconv_register_converter(dcp);
413 if (error)
414 break;
415 error = ICONV_CONVERTER_INIT(dcp);
416 if (error)
417 iconv_unregister_converter(dcp);
418 break;
419 case MOD_UNLOAD:
420 ICONV_CONVERTER_DONE(dcp);
421 error = iconv_unregister_converter(dcp);
422 break;
423 default:
424 error = EINVAL;
425 }
426 return error;
427}
428
429/*
430 * Common used functions
431 */
432char *
433iconv_convstr(void *handle, char *dst, const char *src)
434{
435 char *p = dst;
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436 int error;
437 size_t inlen, outlen;
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438
439 if (handle == NULL) {
440 strcpy(dst, src);
441 return dst;
442 }
443 inlen = outlen = strlen(src);
444 error = iconv_conv(handle, NULL, NULL, &p, &outlen);
445 if (error)
446 return NULL;
447 error = iconv_conv(handle, &src, &inlen, &p, &outlen);
448 if (error)
449 return NULL;
450 *p = 0;
451 return dst;
452}
453
454void *
455iconv_convmem(void *handle, void *dst, const void *src, int size)
456{
457 const char *s = src;
458 char *d = dst;
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459 size_t inlen, outlen;
460 int error;
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461
462 if (size == 0)
463 return dst;
464 if (handle == NULL) {
465 memcpy(dst, src, size);
466 return dst;
467 }
468 inlen = outlen = size;
469 error = iconv_conv(handle, NULL, NULL, &d, &outlen);
470 if (error)
471 return NULL;
472 error = iconv_conv(handle, &s, &inlen, &d, &outlen);
473 if (error)
474 return NULL;
475 return dst;
476}
477
478int
479iconv_lookupcp(char **cpp, const char *s)
480{
481 if (cpp == NULL) {
482 ICDEBUG("warning a NULL list passed\n");
483 return ENOENT;
484 }
485 for (; *cpp; cpp++)
486 if (strcmp(*cpp, s) == 0)
487 return 0;
488 return ENOENT;
489}