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("$FreeBSD$");
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
43MODULE_DEPEND(iconv_xlat, libiconv, 2, 2, 2);
44#endif
45
46/*
47 * XLAT converter instance
48 */
49struct iconv_xlat {
50	KOBJ_FIELDS;
51	u_char *		d_table;
52	struct iconv_cspair *	d_csp;
53};
54
55static int
56iconv_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
69static int
70iconv_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
79static int
80iconv_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
108static const char *
109iconv_xlat_name(struct iconv_converter_class *dcp)
110{
111	return "xlat";
112}
113
114static 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
126KICONV_CONVERTER(xlat, sizeof(struct iconv_xlat));
127