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      1 /*	$NetBSD: citrus_stdenc.c,v 1.4 2011/11/19 18:39:58 tnozaki Exp $	*/
      2 
      3 /*-
      4  * Copyright (c)2003 Citrus Project,
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 #if defined(LIBC_SCCS) && !defined(lint)
     31 __RCSID("$NetBSD: citrus_stdenc.c,v 1.4 2011/11/19 18:39:58 tnozaki Exp $");
     32 #endif /* LIBC_SCCS and not lint */
     33 
     34 #include "namespace.h"
     35 #include <assert.h>
     36 #include <errno.h>
     37 #include <stdlib.h>
     38 #include <string.h>
     39 
     40 #include "citrus_namespace.h"
     41 #include "citrus_types.h"
     42 #include "citrus_module.h"
     43 #include "citrus_stdenc.h"
     44 #include "citrus_none.h"
     45 
     46 struct _citrus_stdenc _citrus_stdenc_default = {
     47 	&_citrus_NONE_stdenc_ops,	/* ce_ops */
     48 	NULL,				/* ce_closure */
     49 	NULL,				/* ce_module */
     50 	&_citrus_NONE_stdenc_traits,	/* ce_traits */
     51 };
     52 
     53 #ifdef _I18N_DYNAMIC
     54 
     55 static int
     56 /*ARGSUSED*/
     57 get_state_desc_default(struct _citrus_stdenc * __restrict ce,
     58 		       void * __restrict ps,
     59 		       int id,
     60 		       struct _citrus_stdenc_state_desc * __restrict d)
     61 {
     62 	return EOPNOTSUPP;
     63 }
     64 
     65 int
     66 _citrus_stdenc_open(struct _citrus_stdenc * __restrict * __restrict rce,
     67 		    char const * __restrict encname,
     68 		    const void * __restrict variable, size_t lenvar)
     69 {
     70 	int ret;
     71 	_citrus_module_t handle;
     72 	struct _citrus_stdenc *ce;
     73 	_citrus_stdenc_getops_t getops;
     74 
     75 	_DIAGASSERT(encname != NULL);
     76 	_DIAGASSERT(!lenvar || variable!=NULL);
     77 	_DIAGASSERT(rce != NULL);
     78 
     79 	if (!strcmp(encname, _CITRUS_DEFAULT_STDENC_NAME)) {
     80 		*rce = &_citrus_stdenc_default;
     81 		return (0);
     82 	}
     83 	ce = malloc(sizeof(*ce));
     84 	if (ce==NULL) {
     85 		ret = errno;
     86 		goto bad;
     87 	}
     88 	ce->ce_ops = NULL;
     89 	ce->ce_closure = NULL;
     90 	ce->ce_module = NULL;
     91 	ce->ce_traits = NULL;
     92 
     93 	ret = _citrus_load_module(&handle, encname);
     94 	if (ret)
     95 		goto bad;
     96 
     97 	ce->ce_module = handle;
     98 
     99 	getops =
    100 	    (_citrus_stdenc_getops_t)_citrus_find_getops(ce->ce_module,
    101 							 encname, "stdenc");
    102 	if (getops == NULL) {
    103 		ret = EINVAL;
    104 		goto bad;
    105 	}
    106 
    107 	ce->ce_ops = (struct _citrus_stdenc_ops *)malloc(sizeof(*ce->ce_ops));
    108 	if (ce->ce_ops == NULL) {
    109 		ret = errno;
    110 		goto bad;
    111 	}
    112 
    113 	ret = (*getops)(ce->ce_ops, sizeof(*ce->ce_ops),
    114 			_CITRUS_STDENC_ABI_VERSION);
    115 	if (ret)
    116 		goto bad;
    117 
    118 	/* If return ABI version is not expected, should fixup it */
    119 	if (ce->ce_ops->eo_abi_version < 0x00000002) {
    120 		ce->ce_ops->eo_get_state_desc = &get_state_desc_default;
    121 	}
    122 
    123 	/* validation check */
    124 	if (ce->ce_ops->eo_init == NULL ||
    125 	    ce->ce_ops->eo_uninit == NULL ||
    126 	    ce->ce_ops->eo_init_state == NULL ||
    127 	    ce->ce_ops->eo_mbtocs == NULL ||
    128 	    ce->ce_ops->eo_cstomb == NULL ||
    129 	    ce->ce_ops->eo_mbtowc == NULL ||
    130 	    ce->ce_ops->eo_wctomb == NULL ||
    131 	    ce->ce_ops->eo_get_state_desc == NULL) {
    132 		ret = EINVAL;
    133 		goto bad;
    134 	}
    135 
    136 	/* allocate traits */
    137 	ce->ce_traits = malloc(sizeof(*ce->ce_traits));
    138 	if (ce->ce_traits == NULL) {
    139 		ret = errno;
    140 		goto bad;
    141 	}
    142 	/* init and get closure */
    143 	ret = (*ce->ce_ops->eo_init)(ce, variable, lenvar, ce->ce_traits);
    144 	if (ret)
    145 		goto bad;
    146 
    147 	*rce = ce;
    148 
    149 	return (0);
    150 
    151 bad:
    152 	_citrus_stdenc_close(ce);
    153 	return (ret);
    154 }
    155 
    156 void
    157 _citrus_stdenc_close(struct _citrus_stdenc *ce)
    158 {
    159 
    160 	_DIAGASSERT(ce != NULL);
    161 
    162 	if (ce == &_citrus_stdenc_default)
    163 		return;
    164 
    165 	if (ce->ce_module) {
    166 		if (ce->ce_ops) {
    167 			if (ce->ce_closure && ce->ce_ops->eo_uninit)
    168 				(*ce->ce_ops->eo_uninit)(ce);
    169 			free(ce->ce_ops);
    170 		}
    171 		free(ce->ce_traits);
    172 		_citrus_unload_module(ce->ce_module);
    173 	}
    174 	free(ce);
    175 }
    176 
    177 #else
    178 /* !_I18N_DYNAMIC */
    179 
    180 int
    181 /*ARGSUSED*/
    182 _citrus_stdenc_open(struct _citrus_stdenc * __restrict * __restrict rce,
    183 		    char const * __restrict encname,
    184 		    const void * __restrict variable, size_t lenvar)
    185 {
    186 	if (!strcmp(encname, _CITRUS_DEFAULT_STDENC_NAME)) {
    187 		*rce = &_citrus_stdenc_default;
    188 		return (0);
    189 	}
    190 	return (EINVAL);
    191 }
    192 
    193 void
    194 /*ARGSUSED*/
    195 _citrus_stdenc_close(struct _citrus_stdenc *ce)
    196 {
    197 }
    198 
    199 #endif
    200