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