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 #include <sys/cdefs.h> 32 33 #include <assert.h> 34 #include <errno.h> 35 #include <stdlib.h> 36 #include <string.h> 37 38 #include "citrus_namespace.h" 39 #include "citrus_types.h" 40 #include "citrus_module.h" 41 #include "citrus_none.h" 42 #include "citrus_stdenc.h" 43 44 struct _citrus_stdenc _citrus_stdenc_default = { 45 &_citrus_NONE_stdenc_ops, /* ce_ops */ 46 NULL, /* ce_closure */ 47 NULL, /* ce_module */ 48 &_citrus_NONE_stdenc_traits, /* ce_traits */ 49 }; 50 51 int 52 _citrus_stdenc_open(struct _citrus_stdenc * __restrict * __restrict rce, 53 char const * __restrict encname, const void * __restrict variable, 54 size_t lenvar) 55 { 56 struct _citrus_stdenc *ce; 57 _citrus_module_t handle; 58 _citrus_stdenc_getops_t getops; 59 int ret; 60 61 if (!strcmp(encname, _CITRUS_DEFAULT_STDENC_NAME)) { 62 *rce = &_citrus_stdenc_default; 63 return (0); 64 } 65 ce = malloc(sizeof(*ce)); 66 if (ce == NULL) { 67 ret = errno; 68 goto bad; 69 } 70 ce->ce_ops = NULL; 71 ce->ce_closure = NULL; 72 ce->ce_module = NULL; 73 ce->ce_traits = NULL; 74 75 ret = _citrus_load_module(&handle, encname); 76 if (ret) 77 goto bad; 78 79 ce->ce_module = handle; 80 81 getops = (_citrus_stdenc_getops_t)_citrus_find_getops(ce->ce_module, 82 encname, "stdenc"); 83 if (getops == NULL) { 84 ret = EINVAL; 85 goto bad; 86 } 87 88 ce->ce_ops = (struct _citrus_stdenc_ops *)malloc(sizeof(*ce->ce_ops)); 89 if (ce->ce_ops == NULL) { 90 ret = errno; 91 goto bad; 92 } 93 94 ret = (*getops)(ce->ce_ops, sizeof(*ce->ce_ops)); 95 if (ret) 96 goto bad; 97 98 /* validation check */ 99 if (ce->ce_ops->eo_init == NULL || 100 ce->ce_ops->eo_uninit == NULL || 101 ce->ce_ops->eo_init_state == NULL || 102 ce->ce_ops->eo_mbtocs == NULL || 103 ce->ce_ops->eo_cstomb == NULL || 104 ce->ce_ops->eo_mbtowc == NULL || 105 ce->ce_ops->eo_wctomb == NULL || 106 ce->ce_ops->eo_get_state_desc == NULL) { 107 ret = EINVAL; 108 goto bad; 109 } 110 111 /* allocate traits */ 112 ce->ce_traits = malloc(sizeof(*ce->ce_traits)); 113 if (ce->ce_traits == NULL) { 114 ret = errno; 115 goto bad; 116 } 117 /* init and get closure */ 118 ret = (*ce->ce_ops->eo_init)(ce, variable, lenvar, ce->ce_traits); 119 if (ret) 120 goto bad; 121 122 *rce = ce; 123 124 return (0); 125 126 bad: 127 _citrus_stdenc_close(ce); 128 return (ret); 129 } 130 131 void 132 _citrus_stdenc_close(struct _citrus_stdenc *ce) 133 { 134 135 if (ce == &_citrus_stdenc_default) 136 return; 137 138 if (ce->ce_module) { 139 if (ce->ce_ops) { 140 if (ce->ce_closure && ce->ce_ops->eo_uninit) 141 (*ce->ce_ops->eo_uninit)(ce); 142 free(ce->ce_ops); 143 } 144 free(ce->ce_traits); 145 _citrus_unload_module(ce->ce_module); 146 } 147 free(ce); 148 } 149