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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD: releng/9.0/sys/libkern/iconv_xlat.c 206361 2010-04-07 16:50:38Z joel $");
29
30 #include <sys/param.h>
31 #include <sys/kernel.h>
32 #include <sys/systm.h>
33 #include <sys/malloc.h>
34 #include <sys/iconv.h>
35
36 #include "iconv_converter_if.h"
37
38 /*
39 * "XLAT" converter
40 */
41
42 #ifdef MODULE_DEPEND
43 MODULE_DEPEND(iconv_xlat, libiconv, 2, 2, 2);
44 #endif
45
46 /*
47 * XLAT converter instance
48 */
49 struct iconv_xlat {
50 KOBJ_FIELDS;
51 u_char * d_table;
52 struct iconv_cspair * d_csp;
53 };
54
55 static int
56 iconv_xlat_open(struct iconv_converter_class *dcp,
57 struct iconv_cspair *csp, struct iconv_cspair *cspf, void **dpp)
58 {
59 struct iconv_xlat *dp;
60
61 dp = (struct iconv_xlat *)kobj_create((struct kobj_class*)dcp, M_ICONV, M_WAITOK);
62 dp->d_table = csp->cp_data;
63 dp->d_csp = csp;
64 csp->cp_refcount++;
65 *dpp = (void*)dp;
66 return 0;
67 }
68
69 static int
70 iconv_xlat_close(void *data)
71 {
72 struct iconv_xlat *dp = data;
73
74 dp->d_csp->cp_refcount--;
75 kobj_delete((struct kobj*)data, M_ICONV);
76 return 0;
77 }
78
79 static int
80 iconv_xlat_conv(void *d2p, const char **inbuf,
81 size_t *inbytesleft, char **outbuf, size_t *outbytesleft,
82 int convchar, int casetype)
83 {
84 struct iconv_xlat *dp = (struct iconv_xlat*)d2p;
85 const char *src;
86 char *dst;
87 int n, r;
88
89 if (inbuf == NULL || *inbuf == NULL || outbuf == NULL || *outbuf == NULL)
90 return 0;
91 if (casetype != 0)
92 return -1;
93 if (convchar == 1)
94 r = n = 1;
95 else
96 r = n = min(*inbytesleft, *outbytesleft);
97 src = *inbuf;
98 dst = *outbuf;
99 while(r--)
100 *dst++ = dp->d_table[(u_char)*src++];
101 *inbuf += n;
102 *outbuf += n;
103 *inbytesleft -= n;
104 *outbytesleft -= n;
105 return 0;
106 }
107
108 static const char *
109 iconv_xlat_name(struct iconv_converter_class *dcp)
110 {
111 return "xlat";
112 }
113
114 static kobj_method_t iconv_xlat_methods[] = {
115 KOBJMETHOD(iconv_converter_open, iconv_xlat_open),
116 KOBJMETHOD(iconv_converter_close, iconv_xlat_close),
117 KOBJMETHOD(iconv_converter_conv, iconv_xlat_conv),
118 #if 0
119 KOBJMETHOD(iconv_converter_init, iconv_xlat_init),
120 KOBJMETHOD(iconv_converter_done, iconv_xlat_done),
121 #endif
122 KOBJMETHOD(iconv_converter_name, iconv_xlat_name),
123 {0, 0}
124 };
125
126 KICONV_CONVERTER(xlat, sizeof(struct iconv_xlat));
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