nls.c revision 100491 
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 * $Id: nls.c,v 1.10 2002/07/22 08:33:59 bp Exp $
33 */
34
35#include <sys/types.h>
36#include <sys/iconv.h>
37#include <sys/sysctl.h>
38#include <ctype.h>
39#ifndef APPLE
40#include <dlfcn.h>
41#endif
42#include <errno.h>
43#include <stdio.h>
44#include <strings.h>
45#include <stdlib.h>
46#include <locale.h>
47#include <err.h>
48#include <netsmb/smb_lib.h>
49
50/*
51 * prototype iconv* functions
52 */
53typedef void *iconv_t;
54
55static iconv_t (*my_iconv_open)(const char *, const char *);
56static size_t(*my_iconv)(iconv_t, const char **, size_t *, char **, size_t *);
57static int(*my_iconv_close)(iconv_t);
58
59u_char nls_lower[256];
60u_char nls_upper[256];
61
62static iconv_t nls_toext, nls_toloc;
63static int iconv_loaded;
64static void *iconv_lib;
65
66int
67nls_setlocale(const char *name)
68{
69	int i;
70
71	if (setlocale(LC_CTYPE, name) == NULL) {
72		warnx("can't set locale '%s'\n", name);
73		return EINVAL;
74	}
75	for (i = 0; i < 256; i++) {
76		nls_lower[i] = tolower(i);
77		nls_upper[i] = toupper(i);
78	}
79	return 0;
80}
81
82int
83nls_setrecode(const char *local, const char *external)
84{
85#ifdef APPLE
86	return ENOENT;
87#else
88	iconv_t icd;
89
90	if (iconv_loaded == 2)
91		return ENOENT;
92	else if (iconv_loaded == 0) {
93		iconv_loaded++;
94		iconv_lib = dlopen("libiconv.so", RTLD_LAZY | RTLD_GLOBAL);
95		if (iconv_lib == NULL) {
96			warn("Unable to load iconv library: %s\n", dlerror());
97			iconv_loaded++;
98			return ENOENT;
99		}
100		my_iconv_open = dlsym(iconv_lib, "iconv_open");
101		my_iconv = dlsym(iconv_lib, "iconv");
102		my_iconv_close = dlsym(iconv_lib, "iconv_close");
103	}
104	if (nls_toext)
105		my_iconv_close(nls_toext);
106	if (nls_toloc)
107		my_iconv_close(nls_toloc);
108	nls_toext = nls_toloc = (iconv_t)0;
109	icd = my_iconv_open(external, local);
110	if (icd == (iconv_t)-1)
111		return errno;
112	nls_toext = icd;
113	icd = my_iconv_open(local, external);
114	if (icd == (iconv_t)-1) {
115		my_iconv_close(nls_toext);
116		nls_toext = (iconv_t)0;
117		return errno;
118	}
119	nls_toloc = icd;
120	return 0;
121#endif
122}
123
124char *
125nls_str_toloc(char *dst, const char *src)
126{
127	char *p = dst;
128	int inlen, outlen;
129
130	if (!iconv_loaded)
131		return strcpy(dst, src);
132
133	if (nls_toloc == (iconv_t)0)
134		return strcpy(dst, src);
135	inlen = outlen = strlen(src);
136	my_iconv(nls_toloc, NULL, NULL, &p, &outlen);
137	while (my_iconv(nls_toloc, &src, &inlen, &p, &outlen) == -1) {
138		*p++ = *src++;
139		inlen--;
140		outlen--;
141	}
142	*p = 0;
143	return dst;
144}
145
146char *
147nls_str_toext(char *dst, const char *src)
148{
149	char *p = dst;
150	int inlen, outlen;
151
152	if (!iconv_loaded)
153		return strcpy(dst, src);
154
155	if (nls_toext == (iconv_t)0)
156		return strcpy(dst, src);
157	inlen = outlen = strlen(src);
158	my_iconv(nls_toext, NULL, NULL, &p, &outlen);
159	while (my_iconv(nls_toext, &src, &inlen, &p, &outlen) == -1) {
160		*p++ = *src++;
161		inlen--;
162		outlen--;
163	}
164	*p = 0;
165	return dst;
166}
167
168void *
169nls_mem_toloc(void *dst, const void *src, int size)
170{
171	char *p = dst;
172	const char *s = src;
173	int inlen, outlen;
174
175	if (!iconv_loaded)
176		return memcpy(dst, src, size);
177
178	if (size == 0)
179		return NULL;
180
181	if (nls_toloc == (iconv_t)0)
182		return memcpy(dst, src, size);
183	inlen = outlen = size;
184	my_iconv(nls_toloc, NULL, NULL, &p, &outlen);
185	while (my_iconv(nls_toloc, &s, &inlen, &p, &outlen) == -1) {
186		*p++ = *s++;
187		inlen--;
188		outlen--;
189	}
190	return dst;
191}
192
193void *
194nls_mem_toext(void *dst, const void *src, int size)
195{
196	char *p = dst;
197	const char *s = src;
198	int inlen, outlen;
199
200	if (size == 0)
201		return NULL;
202
203	if (!iconv_loaded || nls_toext == (iconv_t)0)
204		return memcpy(dst, src, size);
205
206	inlen = outlen = size;
207	my_iconv(nls_toext, NULL, NULL, &p, &outlen);
208	while (my_iconv(nls_toext, &s, &inlen, &p, &outlen) == -1) {
209		*p++ = *s++;
210		inlen--;
211		outlen--;
212	}
213	return dst;
214}
215
216char *
217nls_str_upper(char *dst, const char *src)
218{
219	char *p = dst;
220
221	while (*src)
222		*dst++ = toupper(*src++);
223	*dst = 0;
224	return p;
225}
226
227char *
228nls_str_lower(char *dst, const char *src)
229{
230	char *p = dst;
231
232	while (*src)
233		*dst++ = tolower(*src++);
234	*dst = 0;
235	return p;
236}
237