1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2000-2001 Boris Popov
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/param.h>
30 #include <sys/kernel.h>
31 #include <sys/systm.h>
32 #include <sys/malloc.h>
33 #include <sys/iconv.h>
34
35 #include "iconv_converter_if.h"
36
37 /*
38 * "XLAT" converter
39 */
40
41 #ifdef MODULE_DEPEND
42 MODULE_DEPEND(iconv_xlat, libiconv, 2, 2, 2);
43 #endif
44
45 /*
46 * XLAT converter instance
47 */
48 struct iconv_xlat {
49 KOBJ_FIELDS;
50 u_char * d_table;
51 struct iconv_cspair * d_csp;
52 };
53
54 static int
iconv_xlat_open(struct iconv_converter_class * dcp,struct iconv_cspair * csp,struct iconv_cspair * cspf,void ** dpp)55 iconv_xlat_open(struct iconv_converter_class *dcp,
56 struct iconv_cspair *csp, struct iconv_cspair *cspf, void **dpp)
57 {
58 struct iconv_xlat *dp;
59
60 dp = (struct iconv_xlat *)kobj_create((struct kobj_class*)dcp, M_ICONV, M_WAITOK);
61 dp->d_table = csp->cp_data;
62 dp->d_csp = csp;
63 csp->cp_refcount++;
64 *dpp = (void*)dp;
65 return 0;
66 }
67
68 static int
iconv_xlat_close(void * data)69 iconv_xlat_close(void *data)
70 {
71 struct iconv_xlat *dp = data;
72
73 dp->d_csp->cp_refcount--;
74 kobj_delete((struct kobj*)data, M_ICONV);
75 return 0;
76 }
77
78 static int
iconv_xlat_conv(void * d2p,const char ** inbuf,size_t * inbytesleft,char ** outbuf,size_t * outbytesleft,int convchar,int casetype)79 iconv_xlat_conv(void *d2p, const char **inbuf,
80 size_t *inbytesleft, char **outbuf, size_t *outbytesleft,
81 int convchar, int casetype)
82 {
83 struct iconv_xlat *dp = (struct iconv_xlat*)d2p;
84 const char *src;
85 char *dst;
86 int n, r;
87
88 if (inbuf == NULL || *inbuf == NULL || outbuf == NULL || *outbuf == NULL)
89 return 0;
90 if (casetype != 0)
91 return -1;
92 if (convchar == 1)
93 r = n = 1;
94 else
95 r = n = min(*inbytesleft, *outbytesleft);
96 src = *inbuf;
97 dst = *outbuf;
98 while(r--)
99 *dst++ = dp->d_table[(u_char)*src++];
100 *inbuf += n;
101 *outbuf += n;
102 *inbytesleft -= n;
103 *outbytesleft -= n;
104 return 0;
105 }
106
107 static const char *
iconv_xlat_name(struct iconv_converter_class * dcp)108 iconv_xlat_name(struct iconv_converter_class *dcp)
109 {
110 return "xlat";
111 }
112
113 static kobj_method_t iconv_xlat_methods[] = {
114 KOBJMETHOD(iconv_converter_open, iconv_xlat_open),
115 KOBJMETHOD(iconv_converter_close, iconv_xlat_close),
116 KOBJMETHOD(iconv_converter_conv, iconv_xlat_conv),
117 #if 0
118 KOBJMETHOD(iconv_converter_init, iconv_xlat_init),
119 KOBJMETHOD(iconv_converter_done, iconv_xlat_done),
120 #endif
121 KOBJMETHOD(iconv_converter_name, iconv_xlat_name),
122 {0, 0}
123 };
124
125 KICONV_CONVERTER(xlat, sizeof(struct iconv_xlat));
126