1 /* $FreeBSD$ */ 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 45 struct _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 52 int 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); 126 127 bad: 128 _citrus_stdenc_close(ce); 129 return (ret); 130 } 131 132 void 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