2 * Copyright (c) 2000-2001, Boris Popov
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
32 * $FreeBSD: src/sys/libkern/iconv.c,v 1.1.2.1 2001/05/21 08:28:07 bp Exp $
33 * $DragonFly: src/sys/libiconv/iconv.c,v 1.2 2003/06/17 04:28:42 dillon Exp $
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>
41 #include "iconv_converter_if.h"
43 SYSCTL_DECL(_kern_iconv);
45 SYSCTL_NODE(_kern, OID_AUTO, iconv, CTLFLAG_RW, NULL, "kernel iconv interface");
47 MALLOC_DEFINE(M_ICONV, "ICONV", "ICONV structures");
48 MALLOC_DEFINE(M_ICONVDATA, "ICONV data", "ICONV data");
50 MODULE_VERSION(libiconv, 1);
54 * iconv converter instance
56 struct iconv_converter {
62 struct sysctl_oid *iconv_oid_hook = &sysctl___kern_iconv;
65 * List of loaded converters
67 static TAILQ_HEAD(iconv_converter_list, iconv_converter_class)
68 iconv_converters = TAILQ_HEAD_INITIALIZER(iconv_converters);
71 * List of supported/loaded charsets pairs
73 static TAILQ_HEAD(, iconv_cspair)
74 iconv_cslist = TAILQ_HEAD_INITIALIZER(iconv_cslist);
75 static int iconv_csid = 1;
77 static char iconv_unicode_string[] = "unicode"; /* save eight bytes when possible */
79 static void iconv_unregister_cspair(struct iconv_cspair *csp);
82 iconv_mod_unload(void)
84 struct iconv_cspair *csp;
86 while ((csp = TAILQ_FIRST(&iconv_cslist)) != NULL) {
89 iconv_unregister_cspair(csp);
95 iconv_mod_handler(module_t mod, int type, void *data)
104 error = iconv_mod_unload();
112 static moduledata_t iconv_mod = {
113 "iconv", iconv_mod_handler, NULL
116 DECLARE_MODULE(iconv, iconv_mod, SI_SUB_DRIVERS, SI_ORDER_SECOND);
119 iconv_register_converter(struct iconv_converter_class *dcp)
121 kobj_class_compile((struct kobj_class*)dcp);
123 TAILQ_INSERT_TAIL(&iconv_converters, dcp, cc_link);
128 iconv_unregister_converter(struct iconv_converter_class *dcp)
131 ICDEBUG("converter have %d referenses left\n", dcp->refs);
134 TAILQ_REMOVE(&iconv_converters, dcp, cc_link);
135 kobj_class_free((struct kobj_class*)dcp);
140 iconv_lookupconv(const char *name, struct iconv_converter_class **dcpp)
142 struct iconv_converter_class *dcp;
144 TAILQ_FOREACH(dcp, &iconv_converters, cc_link) {
147 if (strcmp(name, ICONV_CONVERTER_NAME(dcp)) == 0) {
157 iconv_lookupcs(const char *to, const char *from, struct iconv_cspair **cspp)
159 struct iconv_cspair *csp;
161 TAILQ_FOREACH(csp, &iconv_cslist, cp_link) {
162 if (strcmp(csp->cp_to, to) == 0 &&
163 strcmp(csp->cp_from, from) == 0) {
173 iconv_register_cspair(const char *to, const char *from,
174 struct iconv_converter_class *dcp, void *data,
175 struct iconv_cspair **cspp)
177 struct iconv_cspair *csp;
179 int csize, ucsto, ucsfrom;
181 if (iconv_lookupcs(to, from, NULL) == 0)
183 csize = sizeof(*csp);
184 ucsto = strcmp(to, iconv_unicode_string) == 0;
186 csize += strlen(to) + 1;
187 ucsfrom = strcmp(from, iconv_unicode_string) == 0;
189 csize += strlen(from) + 1;
190 csp = malloc(csize, M_ICONV, M_WAITOK);
192 csp->cp_id = iconv_csid++;
194 cp = (char*)(csp + 1);
198 cp += strlen(cp) + 1;
200 csp->cp_to = iconv_unicode_string;
205 csp->cp_from = iconv_unicode_string;
208 TAILQ_INSERT_TAIL(&iconv_cslist, csp, cp_link);
214 iconv_unregister_cspair(struct iconv_cspair *csp)
216 TAILQ_REMOVE(&iconv_cslist, csp, cp_link);
218 free(csp->cp_data, M_ICONVDATA);
223 * Lookup and create an instance of converter.
224 * Currently this layer didn't have associated 'instance' structure
225 * to avoid unnesessary memory allocation.
228 iconv_open(const char *to, const char *from, void **handle)
230 struct iconv_cspair *csp, *cspfrom, *cspto;
231 struct iconv_converter_class *dcp;
236 * First, lookup fully qualified cspairs
238 error = iconv_lookupcs(to, from, &csp);
240 return ICONV_CONVERTER_OPEN(csp->cp_dcp, csp, NULL, handle);
243 * Well, nothing found. Now try to construct a composite conversion
244 * ToDo: add a 'capability' field to converter
246 TAILQ_FOREACH(dcp, &iconv_converters, cc_link) {
247 cnvname = ICONV_CONVERTER_NAME(dcp);
250 error = iconv_lookupcs(cnvname, from, &cspfrom);
253 error = iconv_lookupcs(to, cnvname, &cspto);
257 * Fine, we're found a pair which can be combined together
259 return ICONV_CONVERTER_OPEN(dcp, cspto, cspfrom, handle);
265 iconv_close(void *handle)
267 return ICONV_CONVERTER_CLOSE(handle);
271 iconv_conv(void *handle, const char **inbuf,
272 size_t *inbytesleft, char **outbuf, size_t *outbytesleft)
274 return ICONV_CONVERTER_CONV(handle, inbuf, inbytesleft, outbuf, outbytesleft);
278 * Give a list of loaded converters. Each name terminated with 0.
279 * An empty string terminates the list.
282 iconv_sysctl_drvlist(SYSCTL_HANDLER_ARGS)
284 struct iconv_converter_class *dcp;
291 TAILQ_FOREACH(dcp, &iconv_converters, cc_link) {
292 name = ICONV_CONVERTER_NAME(dcp);
295 error = SYSCTL_OUT(req, name, strlen(name) + 1);
302 error = SYSCTL_OUT(req, &spc, sizeof(spc));
306 SYSCTL_PROC(_kern_iconv, OID_AUTO, drvlist, CTLFLAG_RD | CTLTYPE_OPAQUE,
307 NULL, 0, iconv_sysctl_drvlist, "S,xlat", "registered converters");
310 * List all available charset pairs.
313 iconv_sysctl_cslist(SYSCTL_HANDLER_ARGS)
315 struct iconv_cspair *csp;
316 struct iconv_cspair_info csi;
320 bzero(&csi, sizeof(csi));
321 csi.cs_version = ICONV_CSPAIR_INFO_VER;
323 TAILQ_FOREACH(csp, &iconv_cslist, cp_link) {
324 csi.cs_id = csp->cp_id;
325 csi.cs_refcount = csp->cp_refcount;
326 csi.cs_base = csp->cp_base ? csp->cp_base->cp_id : 0;
327 strcpy(csi.cs_to, csp->cp_to);
328 strcpy(csi.cs_from, csp->cp_from);
329 error = SYSCTL_OUT(req, &csi, sizeof(csi));
336 SYSCTL_PROC(_kern_iconv, OID_AUTO, cslist, CTLFLAG_RD | CTLTYPE_OPAQUE,
337 NULL, 0, iconv_sysctl_cslist, "S,xlat", "registered charset pairs");
340 * Add new charset pair
343 iconv_sysctl_add(SYSCTL_HANDLER_ARGS)
345 struct iconv_converter_class *dcp;
346 struct iconv_cspair *csp;
347 struct iconv_add_in din;
348 struct iconv_add_out dout;
351 error = SYSCTL_IN(req, &din, sizeof(din));
354 if (din.ia_version != ICONV_ADD_VER)
356 if (din.ia_datalen > ICONV_CSMAXDATALEN)
358 if (iconv_lookupconv(din.ia_converter, &dcp) != 0)
360 error = iconv_register_cspair(din.ia_to, din.ia_from, dcp, NULL, &csp);
363 if (din.ia_datalen) {
364 csp->cp_data = malloc(din.ia_datalen, M_ICONVDATA, M_WAITOK);
365 error = copyin(din.ia_data, csp->cp_data, din.ia_datalen);
369 dout.ia_csid = csp->cp_id;
370 error = SYSCTL_OUT(req, &dout, sizeof(dout));
375 iconv_unregister_cspair(csp);
379 SYSCTL_PROC(_kern_iconv, OID_AUTO, add, CTLFLAG_RW | CTLTYPE_OPAQUE,
380 NULL, 0, iconv_sysctl_add, "S,xlat", "register charset pair");
383 * Default stubs for converters
386 iconv_converter_initstub(struct iconv_converter_class *dp)
392 iconv_converter_donestub(struct iconv_converter_class *dp)
398 iconv_converter_handler(module_t mod, int type, void *data)
400 struct iconv_converter_class *dcp = data;
405 error = iconv_register_converter(dcp);
408 error = ICONV_CONVERTER_INIT(dcp);
410 iconv_unregister_converter(dcp);
413 ICONV_CONVERTER_DONE(dcp);
414 error = iconv_unregister_converter(dcp);
423 * Common used functions
426 iconv_convstr(void *handle, char *dst, const char *src)
429 int inlen, outlen, error;
431 if (handle == NULL) {
435 inlen = outlen = strlen(src);
436 error = iconv_conv(handle, NULL, NULL, &p, &outlen);
439 error = iconv_conv(handle, &src, &inlen, &p, &outlen);
447 iconv_convmem(void *handle, void *dst, const void *src, int size)
451 int inlen, outlen, error;
455 if (handle == NULL) {
456 memcpy(dst, src, size);
459 inlen = outlen = size;
460 error = iconv_conv(handle, NULL, NULL, &d, &outlen);
463 error = iconv_conv(handle, &s, &inlen, &d, &outlen);
470 iconv_lookupcp(char **cpp, const char *s)
473 ICDEBUG("warning a NULL list passed\n");
477 if (strcmp(*cpp, s) == 0)