lib/i18n_module/EUCTW/citrus_euctw.c

   1 /* $FreeBSD: head/lib/libiconv_modules/EUCTW/citrus_euctw.c 281550 2015-04-15 09:09:20Z tijl $ */
   2 /*      $NetBSD: citrus_euctw.c,v 1.11 2008/06/14 16:01:07 tnozaki Exp $        */
   3
   4 /*-
   5  * Copyright (c)2002 Citrus Project,
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 /*-
  31  * Copyright (c)1999 Citrus Project,
  32  * All rights reserved.
  33  *
  34  * Redistribution and use in source and binary forms, with or without
  35  * modification, are permitted provided that the following conditions
  36  * are met:
  37  * 1. Redistributions of source code must retain the above copyright
  38  *    notice, this list of conditions and the following disclaimer.
  39  * 2. Redistributions in binary form must reproduce the above copyright
  40  *    notice, this list of conditions and the following disclaimer in the
  41  *    documentation and/or other materials provided with the distribution.
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  44  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  47  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  53  * SUCH DAMAGE.
  54  *
  55  *      $Citrus: xpg4dl/FreeBSD/lib/libc/locale/euctw.c,v 1.13 2001/06/21 01:51:44 yamt Exp $
  56  */
  57
  58 #include <sys/cdefs.h>
  59 #include <sys/types.h>
  60
  61 #include <assert.h>
  62 #include <errno.h>
  63 #include <limits.h>
  64 #include <stddef.h>
  65 #include <stdio.h>
  66 #include <stdlib.h>
  67 #include <string.h>
  68 #include <wchar.h>
  69
  70 #include "citrus_namespace.h"
  71 #include "citrus_types.h"
  72 #include "citrus_module.h"
  73 #include "citrus_stdenc.h"
  74 #include "citrus_euctw.h"
  75
  76
  77 /* ----------------------------------------------------------------------
  78  * private stuffs used by templates
  79  */
  80
  81 typedef struct {
  82         int      chlen;
  83         char     ch[4];
  84 } _EUCTWState;
  85
  86 typedef struct {
  87         int      dummy;
  88 } _EUCTWEncodingInfo;
  89
  90 #define _SS2    0x008e
  91 #define _SS3    0x008f
  92
  93 #define _CEI_TO_EI(_cei_)               (&(_cei_)->ei)
  94 #define _CEI_TO_STATE(_cei_, _func_)    (_cei_)->states.s_##_func_
  95
  96 #define _FUNCNAME(m)                    _citrus_EUCTW_##m
  97 #define _ENCODING_INFO                  _EUCTWEncodingInfo
  98 #define _ENCODING_STATE                 _EUCTWState
  99 #define _ENCODING_MB_CUR_MAX(_ei_)      4
 100 #define _ENCODING_IS_STATE_DEPENDENT    0
 101 #define _STATE_NEEDS_EXPLICIT_INIT(_ps_)        0
 102
 103 static __inline int
 104 _citrus_EUCTW_cs(unsigned int c)
 105 {
 106
 107         c &= 0xff;
 108
 109         return ((c & 0x80) ? (c == _SS2 ? 2 : 1) : 0);
 110 }
 111
 112 static __inline int
 113 _citrus_EUCTW_count(int cs)
 114 {
 115
 116         switch (cs) {
 117         case 0:
 118                 /*FALLTHROUGH*/
 119         case 1:
 120                 /*FALLTHROUGH*/
 121         case 2:
 122                 return (1 << cs);
 123         case 3:
 124                 abort();
 125                 /*NOTREACHED*/
 126         }
 127         return (0);
 128 }
 129
 130 static __inline void
 131 /*ARGSUSED*/
 132 _citrus_EUCTW_init_state(_EUCTWEncodingInfo * __restrict ei __unused,
 133     _EUCTWState * __restrict s)
 134 {
 135
 136         memset(s, 0, sizeof(*s));
 137 }
 138
 139 #if 0
 140 static __inline void
 141 /*ARGSUSED*/
 142 _citrus_EUCTW_pack_state(_EUCTWEncodingInfo * __restrict ei __unused,
 143     void * __restrict pspriv, const _EUCTWState * __restrict s)
 144 {
 145
 146         memcpy(pspriv, (const void *)s, sizeof(*s));
 147 }
 148
 149 static __inline void
 150 /*ARGSUSED*/
 151 _citrus_EUCTW_unpack_state(_EUCTWEncodingInfo * __restrict ei __unused,
 152     _EUCTWState * __restrict s, const void * __restrict pspriv)
 153 {
 154
 155         memcpy((void *)s, pspriv, sizeof(*s));
 156 }
 157 #endif
 158
 159 static int
 160 /*ARGSUSED*/
 161 _citrus_EUCTW_encoding_module_init(_EUCTWEncodingInfo * __restrict ei,
 162     const void * __restrict var __unused, size_t lenvar __unused)
 163 {
 164
 165         memset((void *)ei, 0, sizeof(*ei));
 166
 167         return (0);
 168 }
 169
 170 static void
 171 /*ARGSUSED*/
 172 _citrus_EUCTW_encoding_module_uninit(_EUCTWEncodingInfo *ei __unused)
 173 {
 174
 175 }
 176
 177 static int
 178 _citrus_EUCTW_mbrtowc_priv(_EUCTWEncodingInfo * __restrict ei,
 179     wchar_t * __restrict pwc, char ** __restrict s,
 180     size_t n, _EUCTWState * __restrict psenc, size_t * __restrict nresult)
 181 {
 182         char *s0;
 183         wchar_t wchar;
 184         int c, chlenbak, cs;
 185
 186         s0 = *s;
 187
 188         if (s0 == NULL) {
 189                 _citrus_EUCTW_init_state(ei, psenc);
 190                 *nresult = 0; /* state independent */
 191                 return (0);
 192         }
 193
 194         chlenbak = psenc->chlen;
 195
 196         /* make sure we have the first byte in the buffer */
 197         switch (psenc->chlen) {
 198         case 0:
 199                 if (n < 1)
 200                         goto restart;
 201                 psenc->ch[0] = *s0++;
 202                 psenc->chlen = 1;
 203                 n--;
 204                 break;
 205         case 1:
 206         case 2:
 207                 break;
 208         default:
 209                 /* illgeal state */
 210                 goto ilseq;
 211         }
 212
 213         c = _citrus_EUCTW_count(cs = _citrus_EUCTW_cs(psenc->ch[0] & 0xff));
 214         if (c == 0)
 215                 goto ilseq;
 216         while (psenc->chlen < c) {
 217                 if (n < 1)
 218                         goto ilseq;
 219                 psenc->ch[psenc->chlen] = *s0++;
 220                 psenc->chlen++;
 221                 n--;
 222         }
 223
 224         wchar = 0;
 225         switch (cs) {
 226         case 0:
 227                 if (psenc->ch[0] & 0x80)
 228                         goto ilseq;
 229                 wchar = psenc->ch[0] & 0xff;
 230                 break;
 231         case 1:
 232                 if (!(psenc->ch[0] & 0x80) || !(psenc->ch[1] & 0x80))
 233                         goto ilseq;
 234                 wchar = ((psenc->ch[0] & 0xff) << 8) | (psenc->ch[1] & 0xff);
 235                 wchar |= 'G' << 24;
 236                 break;
 237         case 2:
 238                 if ((unsigned char)psenc->ch[1] < 0xa1 ||
 239                     0xa7 < (unsigned char)psenc->ch[1])
 240                         goto ilseq;
 241                 if (!(psenc->ch[2] & 0x80) || !(psenc->ch[3] & 0x80))
 242                         goto ilseq;
 243                 wchar = ((psenc->ch[2] & 0xff) << 8) | (psenc->ch[3] & 0xff);
 244                 wchar |= ('G' + psenc->ch[1] - 0xa1) << 24;
 245                 break;
 246         default:
 247                 goto ilseq;
 248         }
 249
 250         *s = s0;
 251         psenc->chlen = 0;
 252
 253         if (pwc)
 254                 *pwc = wchar;
 255         *nresult = wchar ? c - chlenbak : 0;
 256         return (0);
 257
 258 ilseq:
 259         psenc->chlen = 0;
 260         *nresult = (size_t)-1;
 261         return (EILSEQ);
 262
 263 restart:
 264         *s = s0;
 265         *nresult = (size_t)-1;
 266         return (0);
 267 }
 268
 269 static int
 270 _citrus_EUCTW_wcrtomb_priv(_EUCTWEncodingInfo * __restrict ei __unused,
 271     char * __restrict s, size_t n, wchar_t wc,
 272     _EUCTWState * __restrict psenc __unused, size_t * __restrict nresult)
 273 {
 274         wchar_t cs, v;
 275         int clen, i, ret;
 276         size_t len;
 277
 278         cs = wc & 0x7f000080;
 279         clen = 1;
 280         if (wc & 0x00007f00)
 281                 clen = 2;
 282         if ((wc & 0x007f0000) && !(wc & 0x00800000))
 283                 clen = 3;
 284
 285         if (clen == 1 && cs == 0x00000000) {
 286                 /* ASCII */
 287                 len = 1;
 288                 if (n < len) {
 289                         ret = E2BIG;
 290                         goto err;
 291                 }
 292                 v = wc & 0x0000007f;
 293         } else if (clen == 2 && cs == ('G' << 24)) {
 294                 /* CNS-11643-1 */
 295                 len = 2;
 296                 if (n < len) {
 297                         ret = E2BIG;
 298                         goto err;
 299                 }
 300                 v = wc & 0x00007f7f;
 301                 v |= 0x00008080;
 302         } else if (clen == 2 && 'H' <= (cs >> 24) && (cs >> 24) <= 'M') {
 303                 /* CNS-11643-[2-7] */
 304                 len = 4;
 305                 if (n < len) {
 306                         ret = E2BIG;
 307                         goto err;
 308                 }
 309                 *s++ = _SS2;
 310                 *s++ = (cs >> 24) - 'H' + 0xa2;
 311                 v = wc & 0x00007f7f;
 312                 v |= 0x00008080;
 313         } else {
 314                 ret = EILSEQ;
 315                 goto err;
 316         }
 317
 318         i = clen;
 319         while (i-- > 0)
 320                 *s++ = (v >> (i << 3)) & 0xff;
 321
 322         *nresult = len;
 323         return (0);
 324
 325 err:
 326         *nresult = (size_t)-1;
 327         return (ret);
 328 }
 329
 330 static __inline int
 331 /*ARGSUSED*/
 332 _citrus_EUCTW_stdenc_wctocs(_EUCTWEncodingInfo * __restrict ei __unused,
 333     _csid_t * __restrict csid, _index_t * __restrict idx, wchar_t wc)
 334 {
 335
 336         *csid = (_csid_t)(wc >> 24) & 0xFF;
 337         *idx  = (_index_t)(wc & 0x7F7F);
 338
 339         return (0);
 340 }
 341
 342 static __inline int
 343 /*ARGSUSED*/
 344 _citrus_EUCTW_stdenc_cstowc(_EUCTWEncodingInfo * __restrict ei __unused,
 345     wchar_t * __restrict wc, _csid_t csid, _index_t idx)
 346 {
 347
 348         if (csid == 0) {
 349                 if ((idx & ~0x7F) != 0)
 350                         return (EINVAL);
 351                 *wc = (wchar_t)idx;
 352         } else {
 353                 if (csid < 'G' || csid > 'M' || (idx & ~0x7F7F) != 0)
 354                         return (EINVAL);
 355                 *wc = (wchar_t)idx | ((wchar_t)csid << 24);
 356         }
 357
 358         return (0);
 359 }
 360
 361 static __inline int
 362 /*ARGSUSED*/
 363 _citrus_EUCTW_stdenc_get_state_desc_generic(_EUCTWEncodingInfo * __restrict ei __unused,
 364     _EUCTWState * __restrict psenc, int * __restrict rstate)
 365 {
 366
 367         *rstate = (psenc->chlen == 0) ? _STDENC_SDGEN_INITIAL :
 368             _STDENC_SDGEN_INCOMPLETE_CHAR;
 369         return (0);
 370 }
 371
 372 /* ----------------------------------------------------------------------
 373  * public interface for stdenc
 374  */
 375
 376 _CITRUS_STDENC_DECLS(EUCTW);
 377 _CITRUS_STDENC_DEF_OPS(EUCTW);
 378
 379 #include "citrus_stdenc_template.h"