citrus_stdenc.c revision 330897 
1/* $FreeBSD: stable/11/lib/libc/iconv/citrus_stdenc.c 330897 2018-03-14 03:19:51Z eadler $ */
2/*	$NetBSD: citrus_stdenc.c,v 1.4 2011/11/19 18:39:58 tnozaki Exp $	*/
3
4/*-
5 * SPDX-License-Identifier: BSD-2-Clause
6 *
7 * Copyright (c)2003 Citrus Project,
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33
34#include <assert.h>
35#include <errno.h>
36#include <stdlib.h>
37#include <string.h>
38
39#include "citrus_namespace.h"
40#include "citrus_types.h"
41#include "citrus_module.h"
42#include "citrus_none.h"
43#include "citrus_stdenc.h"
44
45struct _citrus_stdenc _citrus_stdenc_default = {
46	&_citrus_NONE_stdenc_ops,	/* ce_ops */
47	NULL,				/* ce_closure */
48	NULL,				/* ce_module */
49	&_citrus_NONE_stdenc_traits,	/* ce_traits */
50};
51
52int
53_citrus_stdenc_open(struct _citrus_stdenc * __restrict * __restrict rce,
54    char const * __restrict encname, const void * __restrict variable,
55    size_t lenvar)
56{
57	struct _citrus_stdenc *ce;
58	_citrus_module_t handle;
59	_citrus_stdenc_getops_t getops;
60	int ret;
61
62	if (!strcmp(encname, _CITRUS_DEFAULT_STDENC_NAME)) {
63		*rce = &_citrus_stdenc_default;
64		return (0);
65	}
66	ce = malloc(sizeof(*ce));
67	if (ce == NULL) {
68		ret = errno;
69		goto bad;
70	}
71	ce->ce_ops = NULL;
72	ce->ce_closure = NULL;
73	ce->ce_module = NULL;
74	ce->ce_traits = NULL;
75
76	ret = _citrus_load_module(&handle, encname);
77	if (ret)
78		goto bad;
79
80	ce->ce_module = handle;
81
82	getops = (_citrus_stdenc_getops_t)_citrus_find_getops(ce->ce_module,
83	    encname, "stdenc");
84	if (getops == NULL) {
85		ret = EINVAL;
86		goto bad;
87	}
88
89	ce->ce_ops = (struct _citrus_stdenc_ops *)malloc(sizeof(*ce->ce_ops));
90	if (ce->ce_ops == NULL) {
91		ret = errno;
92		goto bad;
93	}
94
95	ret = (*getops)(ce->ce_ops, sizeof(*ce->ce_ops));
96	if (ret)
97		goto bad;
98
99	/* validation check */
100	if (ce->ce_ops->eo_init == NULL ||
101	    ce->ce_ops->eo_uninit == NULL ||
102	    ce->ce_ops->eo_init_state == NULL ||
103	    ce->ce_ops->eo_mbtocs == NULL ||
104	    ce->ce_ops->eo_cstomb == NULL ||
105	    ce->ce_ops->eo_mbtowc == NULL ||
106	    ce->ce_ops->eo_wctomb == NULL ||
107	    ce->ce_ops->eo_get_state_desc == NULL) {
108		ret = EINVAL;
109		goto bad;
110	}
111
112	/* allocate traits */
113	ce->ce_traits = malloc(sizeof(*ce->ce_traits));
114	if (ce->ce_traits == NULL) {
115		ret = errno;
116		goto bad;
117	}
118	/* init and get closure */
119	ret = (*ce->ce_ops->eo_init)(ce, variable, lenvar, ce->ce_traits);
120	if (ret)
121		goto bad;
122
123	*rce = ce;
124
125	return (0);
126
127bad:
128	_citrus_stdenc_close(ce);
129	return (ret);
130}
131
132void
133_citrus_stdenc_close(struct _citrus_stdenc *ce)
134{
135
136	if (ce == &_citrus_stdenc_default)
137		return;
138
139	if (ce->ce_module) {
140		if (ce->ce_ops) {
141			if (ce->ce_closure && ce->ce_ops->eo_uninit)
142				(*ce->ce_ops->eo_uninit)(ce);
143			free(ce->ce_ops);
144		}
145		free(ce->ce_traits);
146		_citrus_unload_module(ce->ce_module);
147	}
148	free(ce);
149}
150