bge: Avoid accessing invalid internal memory region on BCM5906
[dragonfly.git] / sys / libiconv / iconv_xlat.c
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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 *
efd03c68 32 * $FreeBSD: src/sys/libkern/iconv_xlat.c,v 1.5.30.1 2009/04/15 03:14:26 kensmith Exp $
678a32ed 33 * $DragonFly: src/sys/libiconv/iconv_xlat.c,v 1.3 2004/03/18 18:27:47 dillon Exp $
984263bc 34 */
efd03c68 35
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36#include <sys/param.h>
37#include <sys/kernel.h>
38#include <sys/systm.h>
39#include <sys/malloc.h>
40#include <sys/iconv.h>
41
42#include "iconv_converter_if.h"
43
44/*
45 * "XLAT" converter
46 */
47
48#ifdef MODULE_DEPEND
efd03c68 49MODULE_DEPEND(iconv_xlat, libiconv, 2, 2, 2);
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50#endif
51
52/*
53 * XLAT converter instance
54 */
55struct iconv_xlat {
56 KOBJ_FIELDS;
57 u_char * d_table;
58 struct iconv_cspair * d_csp;
59};
60
61static int
62iconv_xlat_open(struct iconv_converter_class *dcp,
63 struct iconv_cspair *csp, struct iconv_cspair *cspf, void **dpp)
64{
65 struct iconv_xlat *dp;
66
67 dp = (struct iconv_xlat *)kobj_create((struct kobj_class*)dcp, M_ICONV, M_WAITOK);
68 dp->d_table = csp->cp_data;
69 dp->d_csp = csp;
70 csp->cp_refcount++;
71 *dpp = (void*)dp;
72 return 0;
73}
74
75static int
76iconv_xlat_close(void *data)
77{
78 struct iconv_xlat *dp = data;
79
80 dp->d_csp->cp_refcount--;
81 kobj_delete((struct kobj*)data, M_ICONV);
82 return 0;
83}
84
85static int
86iconv_xlat_conv(void *d2p, const char **inbuf,
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87 size_t *inbytesleft, char **outbuf, size_t *outbytesleft,
88 int convchar, int casetype)
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89{
90 struct iconv_xlat *dp = (struct iconv_xlat*)d2p;
91 const char *src;
92 char *dst;
93 int n, r;
94
95 if (inbuf == NULL || *inbuf == NULL || outbuf == NULL || *outbuf == NULL)
96 return 0;
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97 if (casetype != 0)
98 return -1;
99 if (convchar == 1)
100 r = n = 1;
101 else
102 r = n = min(*inbytesleft, *outbytesleft);
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103 src = *inbuf;
104 dst = *outbuf;
105 while(r--)
106 *dst++ = dp->d_table[(u_char)*src++];
107 *inbuf += n;
108 *outbuf += n;
efd03c68 109 *inbytesleft -= n;
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110 *outbytesleft -= n;
111 return 0;
112}
113
114static const char *
115iconv_xlat_name(struct iconv_converter_class *dcp)
116{
117 return "xlat";
118}
119
120static kobj_method_t iconv_xlat_methods[] = {
121 KOBJMETHOD(iconv_converter_open, iconv_xlat_open),
122 KOBJMETHOD(iconv_converter_close, iconv_xlat_close),
123 KOBJMETHOD(iconv_converter_conv, iconv_xlat_conv),
124#if 0
125 KOBJMETHOD(iconv_converter_init, iconv_xlat_init),
126 KOBJMETHOD(iconv_converter_done, iconv_xlat_done),
127#endif
128 KOBJMETHOD(iconv_converter_name, iconv_xlat_name),
129 {0, 0}
130};
131
132KICONV_CONVERTER(xlat, sizeof(struct iconv_xlat));