xref: /dragonfly/lib/libc/iconv/iconv.c (revision ef3ac1d1) 
1 /* $FreeBSD: head/lib/libc/iconv/iconv.c 254273 2013-08-13 07:15:01Z peter $ */
2 /* $NetBSD: iconv.c,v 1.11 2009/03/03 16:22:33 explorer Exp $ */
3 
4 /*-
5  * Copyright (c) 2003 Citrus Project,
6  * Copyright (c) 2009, 2010 Gabor Kovesdan <gabor@FreeBSD.org>,
7  * All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  *    notice, this list of conditions and the following disclaimer in the
16  *    documentation and/or other materials provided with the distribution.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28  * SUCH DAMAGE.
29  */
30 
31 #include <sys/cdefs.h>
32 #include <sys/queue.h>
33 #include <sys/types.h>
34 
35 #include <assert.h>
36 #include <errno.h>
37 #include <iconv.h>
38 #include <limits.h>
39 #include <paths.h>
40 #include <stdbool.h>
41 #include <stdlib.h>
42 #include <string.h>
43 
44 #include "../citrus/citrus_types.h"
45 #include "../citrus/citrus_module.h"
46 #include "../citrus/citrus_esdb.h"
47 #include "../citrus/citrus_hash.h"
48 #include "../citrus/citrus_iconv.h"
49 
50 #define ISBADF(_h_)	(!(_h_) || (_h_) == (iconv_t)-1)
51 
52 int _iconv_version = _ICONV_VERSION;
53 
54 iconv_t		 _iconv_open(const char *out, const char *in,
55 		    struct _citrus_iconv *prealloc);
56 
57 iconv_t
58 _iconv_open(const char *out, const char *in, struct _citrus_iconv *handle)
59 {
60 	const char *out_slashes;
61 	char *out_noslashes;
62 	int ret;
63 
64 	/*
65 	 * Remove anything following a //, as these are options (like
66 	 * //ignore, //translate, etc) and we just don't handle them.
67 	 * This is for compatibility with software that uses these
68 	 * blindly.
69 	 */
70 	out_slashes = strstr(out, "//");
71 	if (out_slashes != NULL) {
72 		out_noslashes = strndup(out, out_slashes - out);
73 		if (out_noslashes == NULL) {
74 			errno = ENOMEM;
75 			return ((iconv_t)-1);
76 		}
77 		ret = _citrus_iconv_open(&handle, in, out_noslashes);
78 		free(out_noslashes);
79 	} else {
80 		ret = _citrus_iconv_open(&handle, in, out);
81 	}
82 
83 	if (ret) {
84 		errno = ret == ENOENT ? EINVAL : ret;
85 		return ((iconv_t)-1);
86 	}
87 
88 	handle->cv_shared->ci_discard_ilseq = strcasestr(out, "//IGNORE");
89 	handle->cv_shared->ci_hooks = NULL;
90 
91 	return ((iconv_t)(void *)handle);
92 }
93 
94 iconv_t
95 iconv_open(const char *out, const char *in)
96 {
97 
98 	return (_iconv_open(out, in, NULL));
99 }
100 
101 int
102 iconv_open_into(const char *out, const char *in, iconv_allocation_t *ptr)
103 {
104 	struct _citrus_iconv *handle;
105 
106 	handle = (struct _citrus_iconv *)ptr;
107 	return ((_iconv_open(out, in, handle) == (iconv_t)-1) ? -1 : 0);
108 }
109 
110 int
111 iconv_close(iconv_t handle)
112 {
113 
114 	if (ISBADF(handle)) {
115 		errno = EBADF;
116 		return (-1);
117 	}
118 
119 	_citrus_iconv_close((struct _citrus_iconv *)(void *)handle);
120 
121 	return (0);
122 }
123 
124 size_t
125 iconv(iconv_t handle, const char **in, size_t *szin, char **out, size_t *szout)
126 {
127 	size_t ret;
128 	int err;
129 
130 	if (ISBADF(handle)) {
131 		errno = EBADF;
132 		return ((size_t)-1);
133 	}
134 
135 	err = _citrus_iconv_convert((struct _citrus_iconv *)(void *)handle,
136 	    in, szin, out, szout, 0, &ret);
137 	if (err) {
138 		errno = err;
139 		ret = (size_t)-1;
140 	}
141 
142 	return (ret);
143 }
144 
145 size_t
146 __iconv(iconv_t handle, const char **in, size_t *szin, char **out,
147     size_t *szout, uint32_t flags, size_t *invalids)
148 {
149 	size_t ret;
150 	int err;
151 
152 	if (ISBADF(handle)) {
153 		errno = EBADF;
154 		return ((size_t)-1);
155 	}
156 
157 	err = _citrus_iconv_convert((struct _citrus_iconv *)(void *)handle,
158 	    in, szin, out, szout, flags, &ret);
159 	if (invalids)
160 		*invalids = ret;
161 	if (err) {
162 		errno = err;
163 		ret = (size_t)-1;
164 	}
165 
166 	return (ret);
167 }
168 
169 int
170 __iconv_get_list(char ***rlist, size_t *rsz, bool sorted)
171 {
172 	int ret;
173 
174 	ret = _citrus_esdb_get_list(rlist, rsz, sorted);
175 	if (ret) {
176 		errno = ret;
177 		return (-1);
178 	}
179 
180 	return (0);
181 }
182 
183 void
184 __iconv_free_list(char **list, size_t sz)
185 {
186 
187 	_citrus_esdb_free_list(list, sz);
188 }
189 
190 /*
191  * GNU-compatibile non-standard interfaces.
192  */
193 static int
194 qsort_helper(const void *first, const void *second)
195 {
196 	const char * const *s1;
197 	const char * const *s2;
198 
199 	s1 = first;
200 	s2 = second;
201 	return (strcmp(*s1, *s2));
202 }
203 
204 void
205 iconvlist(int (*do_one) (unsigned int, const char * const *,
206     void *), void *data)
207 {
208 	char **list, **names;
209 	const char * const *np;
210 	char *curitem, *curkey, *slashpos;
211 	size_t sz;
212 	unsigned int i, j;
213 
214 	i = 0;
215 
216 	if (__iconv_get_list(&list, &sz, true))
217 		list = NULL;
218 	qsort((void *)list, sz, sizeof(char *), qsort_helper);
219 	while (i < sz) {
220 		j = 0;
221 		slashpos = strchr(list[i], '/');
222 		curkey = (char *)malloc(slashpos - list[i] + 2);
223 		names = (char **)malloc(sz * sizeof(char *));
224 		if ((curkey == NULL) || (names == NULL)) {
225 			__iconv_free_list(list, sz);
226 			return;
227 		}
228 		strlcpy(curkey, list[i], slashpos - list[i] + 1);
229 		names[j++] = strdup(curkey);
230 		for (; (i < sz) && (memcmp(curkey, list[i], strlen(curkey)) == 0); i++) {
231 			slashpos = strchr(list[i], '/');
232 			curitem = (char *)malloc(strlen(slashpos) + 1);
233 			if (curitem == NULL) {
234 				__iconv_free_list(list, sz);
235 				return;
236 			}
237 			strlcpy(curitem, &slashpos[1], strlen(slashpos) + 1);
238 			if (strcmp(curkey, curitem) == 0) {
239 				continue;
240 			}
241 			names[j++] = strdup(curitem);
242 		}
243 		np = (const char * const *)names;
244 		do_one(j, np, data);
245 		free(names);
246 	}
247 
248 	__iconv_free_list(list, sz);
249 }
250 
251 __inline const char
252 *iconv_canonicalize(const char *name)
253 {
254 
255 	return (_citrus_iconv_canonicalize(name));
256 }
257 
258 int
259 iconvctl(iconv_t cd, int request, void *argument)
260 {
261 	struct _citrus_iconv *cv;
262 	struct iconv_hooks *hooks;
263 	const char *convname;
264 	char src[PATH_MAX], *dst;
265 	int *i;
266 
267 	cv = (struct _citrus_iconv *)(void *)cd;
268 	hooks = (struct iconv_hooks *)argument;
269 	i = (int *)argument;
270 
271 	if (ISBADF(cd)) {
272 		errno = EBADF;
273 		return (-1);
274 	}
275 
276 	switch (request) {
277 	case ICONV_TRIVIALP:
278 		convname = cv->cv_shared->ci_convname;
279 		dst = strchr(convname, '/');
280 
281 		strlcpy(src, convname, dst - convname + 1);
282 		dst++;
283 		if ((convname == NULL) || (src == NULL) || (dst == NULL))
284 			return (-1);
285 		*i = strcmp(src, dst) == 0 ? 1 : 0;
286 		return (0);
287 	case ICONV_GET_TRANSLITERATE:
288 		*i = 1;
289 		return (0);
290 	case ICONV_SET_TRANSLITERATE:
291 		return  ((*i == 1) ? 0 : -1);
292 	case ICONV_GET_DISCARD_ILSEQ:
293 		*i = cv->cv_shared->ci_discard_ilseq ? 1 : 0;
294 		return (0);
295 	case ICONV_SET_DISCARD_ILSEQ:
296 		cv->cv_shared->ci_discard_ilseq = *i;
297 		return (0);
298 	case ICONV_SET_HOOKS:
299 		cv->cv_shared->ci_hooks = hooks;
300 		return (0);
301 	case ICONV_SET_FALLBACKS:
302 		errno = EOPNOTSUPP;
303 		return (-1);
304 	case ICONV_GET_ILSEQ_INVALID:
305 		*i = cv->cv_shared->ci_ilseq_invalid ? 1 : 0;
306 		return (0);
307 	case ICONV_SET_ILSEQ_INVALID:
308 		cv->cv_shared->ci_ilseq_invalid = *i;
309 		return (0);
310 	default:
311 		errno = EINVAL;
312 		return (-1);
313 	}
314 }
315 
316 void
317 iconv_set_relocation_prefix(const char *orig_prefix __unused,
318     const char *curr_prefix __unused)
319 {
320 
321 }
322