lib/libc/citrus/citrus_none.c

   1 /* $FreeBSD: head/lib/libc/iconv/citrus_none.c 281550 2015-04-15 09:09:20Z tijl $ */
   2 /* $NetBSD: citrus_none.c,v 1.18 2008/06/14 16:01:07 tnozaki Exp $ */
   3
   4 /*-
   5  * Copyright (c) 2002 Citrus Project,
   6  * Copyright (c) 2010 Gabor Kovesdan <gabor@FreeBSD.org>,
   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 #include <sys/types.h>
  33
  34 #include <assert.h>
  35 #include <errno.h>
  36 #include <iconv.h>
  37 #include <stddef.h>
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <wchar.h>
  42
  43 #include "citrus_namespace.h"
  44 #include "citrus_types.h"
  45 #include "citrus_module.h"
  46 #include "citrus_none.h"
  47 #include "citrus_stdenc.h"
  48
  49 _CITRUS_STDENC_DECLS(NONE);
  50 _CITRUS_STDENC_DEF_OPS(NONE);
  51 struct _citrus_stdenc_traits _citrus_NONE_stdenc_traits = {
  52         0,      /* et_state_size */
  53         1,      /* mb_cur_max */
  54 };
  55
  56 static int
  57 _citrus_NONE_stdenc_init(struct _citrus_stdenc * __restrict ce,
  58     const void *var __unused, size_t lenvar __unused,
  59     struct _citrus_stdenc_traits * __restrict et)
  60 {
  61
  62         et->et_state_size = 0;
  63         et->et_mb_cur_max = 1;
  64
  65         ce->ce_closure = NULL;
  66
  67         return (0);
  68 }
  69
  70 static void
  71 _citrus_NONE_stdenc_uninit(struct _citrus_stdenc *ce __unused)
  72 {
  73
  74 }
  75
  76 static int
  77 _citrus_NONE_stdenc_init_state(struct _citrus_stdenc * __restrict ce __unused,
  78     void * __restrict ps __unused)
  79 {
  80
  81         return (0);
  82 }
  83
  84 static int
  85 _citrus_NONE_stdenc_mbtocs(struct _citrus_stdenc * __restrict ce __unused,
  86     _csid_t *csid, _index_t *idx, char **s, size_t n,
  87     void *ps __unused, size_t *nresult, struct iconv_hooks *hooks)
  88 {
  89
  90         if (n < 1) {
  91                 *nresult = (size_t)-2;
  92                 return (0);
  93         }
  94
  95         *csid = 0;
  96         *idx = (_index_t)(unsigned char)*(*s)++;
  97         *nresult = *idx == 0 ? 0 : 1;
  98
  99         if ((hooks != NULL) && (hooks->uc_hook != NULL))
 100                 hooks->uc_hook((unsigned int)*idx, hooks->data);
 101
 102         return (0);
 103 }
 104
 105 static int
 106 _citrus_NONE_stdenc_cstomb(struct _citrus_stdenc * __restrict ce __unused,
 107     char *s, size_t n, _csid_t csid, _index_t idx, void *ps __unused,
 108     size_t *nresult, struct iconv_hooks *hooks __unused)
 109 {
 110
 111         if (csid == _CITRUS_CSID_INVALID) {
 112                 *nresult = 0;
 113                 return (0);
 114         }
 115         if (csid != 0)
 116                 return (EILSEQ);
 117
 118         if ((idx & 0x000000FF) == idx) {
 119                 if (n < 1) {
 120                         *nresult = (size_t)-1;
 121                         return (E2BIG);
 122                 }
 123                 *s = (char)idx;
 124                 *nresult = 1;
 125         } else if ((idx & 0x0000FFFF) == idx) {
 126                 if (n < 2) {
 127                         *nresult = (size_t)-1;
 128                         return (E2BIG);
 129                 }
 130                 s[0] = (char)idx;
 131                 /* XXX: might be endian dependent */
 132                 s[1] = (char)(idx >> 8);
 133                 *nresult = 2;
 134         } else if ((idx & 0x00FFFFFF) == idx) {
 135                 if (n < 3) {
 136                         *nresult = (size_t)-1;
 137                         return (E2BIG);
 138                 }
 139                 s[0] = (char)idx;
 140                 /* XXX: might be endian dependent */
 141                 s[1] = (char)(idx >> 8);
 142                 s[2] = (char)(idx >> 16);
 143                 *nresult = 3;
 144         } else {
 145                 if (n < 3) {
 146                         *nresult = (size_t)-1;
 147                         return (E2BIG);
 148                 }
 149                 s[0] = (char)idx;
 150                 /* XXX: might be endian dependent */
 151                 s[1] = (char)(idx >> 8);
 152                 s[2] = (char)(idx >> 16);
 153                 s[3] = (char)(idx >> 24);
 154                 *nresult = 4;
 155         }
 156
 157         return (0);
 158 }
 159
 160 static int
 161 _citrus_NONE_stdenc_mbtowc(struct _citrus_stdenc * __restrict ce __unused,
 162     _wc_t * __restrict pwc, char ** __restrict s, size_t n,
 163     void * __restrict pspriv __unused, size_t * __restrict nresult,
 164     struct iconv_hooks *hooks)
 165 {
 166         _DIAGASSERT(s != NULL);
 167
 168         if (*s == NULL) {
 169                 *nresult = 0;
 170                 return (0);
 171         }
 172         if (n == 0) {
 173                 *nresult = (size_t)-2;
 174                 return (0);
 175         }
 176
 177         if (pwc != NULL)
 178                 *pwc = (_wc_t)(unsigned char) **s;
 179
 180         *nresult = **s == '\0' ? 0 : 1;
 181
 182         if ((hooks != NULL) && (hooks->wc_hook != NULL))
 183                 hooks->wc_hook(*pwc, hooks->data);
 184
 185         return (0);
 186 }
 187
 188 static int
 189 _citrus_NONE_stdenc_wctomb(struct _citrus_stdenc * __restrict ce __unused,
 190     char * __restrict s, size_t n, _wc_t wc,
 191     void * __restrict pspriv __unused, size_t * __restrict nresult,
 192     struct iconv_hooks *hooks __unused)
 193 {
 194
 195         if ((wc & ~0xFFU) != 0) {
 196                 *nresult = (size_t)-1;
 197                 return (EILSEQ);
 198         }
 199         if (n == 0) {
 200                 *nresult = (size_t)-1;
 201                 return (E2BIG);
 202         }
 203
 204         *nresult = 1;
 205         if (s != NULL && n > 0)
 206                 *s = (char)wc;
 207
 208         return (0);
 209 }
 210
 211 static int
 212 _citrus_NONE_stdenc_put_state_reset(struct _citrus_stdenc * __restrict ce __unused,
 213     char * __restrict s __unused, size_t n __unused,
 214     void * __restrict pspriv __unused, size_t * __restrict nresult)
 215 {
 216
 217         *nresult = 0;
 218
 219         return (0);
 220 }
 221
 222 static int
 223 _citrus_NONE_stdenc_get_state_desc(struct _stdenc * __restrict ce __unused,
 224     void * __restrict ps __unused, int id,
 225     struct _stdenc_state_desc * __restrict d)
 226 {
 227         int ret = 0;
 228
 229         switch (id) {
 230         case _STDENC_SDID_GENERIC:
 231                 d->u.generic.state = _STDENC_SDGEN_INITIAL;
 232                 break;
 233         default:
 234                 ret = EOPNOTSUPP;
 235         }
 236
 237         return (ret);
 238 }