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
42MODULE_DEPEND(iconv_xlat, libiconv, 2, 2, 2);
43#endif
44
45/*
46 * XLAT converter instance
47 */
48struct iconv_xlat {
49	KOBJ_FIELDS;
50	u_char *		d_table;
51	struct iconv_cspair *	d_csp;
52};
53
54static int
55iconv_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
68static int
69iconv_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
78static int
79iconv_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
107static const char *
108iconv_xlat_name(struct iconv_converter_class *dcp)
109{
110	return "xlat";
111}
112
113static 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
125KICONV_CONVERTER(xlat, sizeof(struct iconv_xlat));
126