lib/i18n_module/JOHAB/citrus_johab.c

   1 /* $FreeBSD: head/lib/libiconv_modules/JOHAB/citrus_johab.c 281550 2015-04-15 09:09:20Z tijl $ */
   2 /* $NetBSD: citrus_johab.c,v 1.4 2008/06/14 16:01:07 tnozaki Exp $ */
   3
   4 /*-
   5  * Copyright (c)2006 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 #include <sys/cdefs.h>
  30 #include <sys/types.h>
  31
  32 #include <assert.h>
  33 #include <errno.h>
  34 #include <limits.h>
  35 #include <stdbool.h>
  36 #include <stddef.h>
  37 #include <stdint.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_bcs.h"
  46 #include "citrus_module.h"
  47 #include "citrus_stdenc.h"
  48 #include "citrus_johab.h"
  49
  50 /* ----------------------------------------------------------------------
  51  * private stuffs used by templates
  52  */
  53
  54 typedef struct {
  55         int      chlen;
  56         char     ch[2];
  57 } _JOHABState;
  58
  59 typedef struct {
  60         int      dummy;
  61 } _JOHABEncodingInfo;
  62
  63 #define _CEI_TO_EI(_cei_)               (&(_cei_)->ei)
  64 #define _CEI_TO_STATE(_cei_, _func_)    (_cei_)->states.s_##_func_
  65
  66 #define _FUNCNAME(m)                    _citrus_JOHAB_##m
  67 #define _ENCODING_INFO                  _JOHABEncodingInfo
  68 #define _ENCODING_STATE                 _JOHABState
  69 #define _ENCODING_MB_CUR_MAX(_ei_)              2
  70 #define _ENCODING_IS_STATE_DEPENDENT            0
  71 #define _STATE_NEEDS_EXPLICIT_INIT(_ps_)        0
  72
  73
  74 static __inline void
  75 /*ARGSUSED*/
  76 _citrus_JOHAB_init_state(_JOHABEncodingInfo * __restrict ei __unused,
  77     _JOHABState * __restrict psenc)
  78 {
  79
  80         psenc->chlen = 0;
  81 }
  82
  83 #if 0
  84 static __inline void
  85 /*ARGSUSED*/
  86 _citrus_JOHAB_pack_state(_JOHABEncodingInfo * __restrict ei __unused,
  87     void * __restrict pspriv, const _JOHABState * __restrict psenc)
  88 {
  89
  90         memcpy(pspriv, (const void *)psenc, sizeof(*psenc));
  91 }
  92
  93 static __inline void
  94 /*ARGSUSED*/
  95 _citrus_JOHAB_unpack_state(_JOHABEncodingInfo * __restrict ei __unused,
  96     _JOHABState * __restrict psenc, const void * __restrict pspriv)
  97 {
  98
  99         memcpy((void *)psenc, pspriv, sizeof(*psenc));
 100 }
 101 #endif
 102
 103 static void
 104 /*ARGSUSED*/
 105 _citrus_JOHAB_encoding_module_uninit(_JOHABEncodingInfo *ei __unused)
 106 {
 107
 108         /* ei may be null */
 109 }
 110
 111 static int
 112 /*ARGSUSED*/
 113 _citrus_JOHAB_encoding_module_init(_JOHABEncodingInfo * __restrict ei __unused,
 114     const void * __restrict var __unused, size_t lenvar __unused)
 115 {
 116
 117         /* ei may be null */
 118         return (0);
 119 }
 120
 121 static __inline bool
 122 ishangul(int l, int t)
 123 {
 124
 125         return ((l >= 0x84 && l <= 0xD3) &&
 126             ((t >= 0x41 && t <= 0x7E) || (t >= 0x81 && t <= 0xFE)));
 127 }
 128
 129 static __inline bool
 130 isuda(int l, int t)
 131 {
 132
 133         return ((l == 0xD8) &&
 134             ((t >= 0x31 && t <= 0x7E) || (t >= 0x91 && t <= 0xFE)));
 135 }
 136
 137 static __inline bool
 138 ishanja(int l, int t)
 139 {
 140
 141         return (((l >= 0xD9 && l <= 0xDE) || (l >= 0xE0 && l <= 0xF9)) &&
 142             ((t >= 0x31 && t <= 0x7E) || (t >= 0x91 && t <= 0xFE)));
 143 }
 144
 145 static int
 146 /*ARGSUSED*/
 147 _citrus_JOHAB_mbrtowc_priv(_JOHABEncodingInfo * __restrict ei,
 148     wchar_t * __restrict pwc, char ** __restrict s, size_t n,
 149     _JOHABState * __restrict psenc, size_t * __restrict nresult)
 150 {
 151         char *s0;
 152         int l, t;
 153
 154         if (*s == NULL) {
 155                 _citrus_JOHAB_init_state(ei, psenc);
 156                 *nresult = _ENCODING_IS_STATE_DEPENDENT;
 157                 return (0);
 158         }
 159         s0 = *s;
 160
 161         switch (psenc->chlen) {
 162         case 0:
 163                 if (n-- < 1)
 164                         goto restart;
 165                 l = *s0++ & 0xFF;
 166                 if (l <= 0x7F) {
 167                         if (pwc != NULL)
 168                                 *pwc = (wchar_t)l;
 169                         *nresult = (l == 0) ? 0 : 1;
 170                         *s = s0;
 171                         return (0);
 172                 }
 173                 psenc->ch[psenc->chlen++] = l;
 174                 break;
 175         case 1:
 176                 l = psenc->ch[0] & 0xFF;
 177                 break;
 178         default:
 179                 return (EINVAL);
 180         }
 181         if (n-- < 1) {
 182 restart:
 183                 *nresult = (size_t)-2;
 184                 *s = s0;
 185                 return (0);
 186         }
 187         t = *s0++ & 0xFF;
 188         if (!ishangul(l, t) && !isuda(l, t) && !ishanja(l, t)) {
 189                 *nresult = (size_t)-1;
 190                 return (EILSEQ);
 191         }
 192         if (pwc != NULL)
 193                 *pwc = (wchar_t)(l << 8 | t);
 194         *nresult = s0 - *s;
 195         *s = s0;
 196         psenc->chlen = 0;
 197
 198         return (0);
 199 }
 200
 201 static int
 202 /*ARGSUSED*/
 203 _citrus_JOHAB_wcrtomb_priv(_JOHABEncodingInfo * __restrict ei __unused,
 204     char * __restrict s, size_t n, wchar_t wc,
 205     _JOHABState * __restrict psenc, size_t * __restrict nresult)
 206 {
 207         int l, t;
 208
 209         if (psenc->chlen != 0)
 210                 return (EINVAL);
 211
 212         /* XXX assume wchar_t as int */
 213         if ((uint32_t)wc <= 0x7F) {
 214                 if (n < 1)
 215                         goto e2big;
 216                 *s = wc & 0xFF;
 217                 *nresult = 1;
 218         } else if ((uint32_t)wc <= 0xFFFF) {
 219                 if (n < 2) {
 220 e2big:
 221                         *nresult = (size_t)-1;
 222                         return (E2BIG);
 223                 }
 224                 l = (wc >> 8) & 0xFF;
 225                 t = wc & 0xFF;
 226                 if (!ishangul(l, t) && !isuda(l, t) && !ishanja(l, t))
 227                         goto ilseq;
 228                 *s++ = l;
 229                 *s = t;
 230                 *nresult = 2;
 231         } else {
 232 ilseq:
 233                 *nresult = (size_t)-1;
 234                 return (EILSEQ);
 235         }
 236         return (0);
 237
 238 }
 239
 240 static __inline int
 241 /*ARGSUSED*/
 242 _citrus_JOHAB_stdenc_wctocs(_JOHABEncodingInfo * __restrict ei __unused,
 243     _csid_t * __restrict csid, _index_t * __restrict idx, wchar_t wc)
 244 {
 245         int m, l, linear, t;
 246
 247         /* XXX assume wchar_t as int */
 248         if ((uint32_t)wc <= 0x7F) {
 249                 *idx = (_index_t)wc;
 250                 *csid = 0;
 251         } else if ((uint32_t)wc <= 0xFFFF) {
 252                 l = (wc >> 8) & 0xFF;
 253                 t = wc & 0xFF;
 254                 if (ishangul(l, t) || isuda(l, t)) {
 255                         *idx = (_index_t)wc;
 256                         *csid = 1;
 257                 } else {
 258                         if (l >= 0xD9 && l <= 0xDE) {
 259                                 linear = l - 0xD9;
 260                                 m = 0x21;
 261                         } else if (l >= 0xE0 && l <= 0xF9) {
 262                                 linear = l - 0xE0;
 263                                 m = 0x4A;
 264                         } else
 265                                 return (EILSEQ);
 266                         linear *= 188;
 267                         if (t >= 0x31 && t <= 0x7E)
 268                                 linear += t - 0x31;
 269                         else if (t >= 0x91 && t <= 0xFE)
 270                                 linear += t - 0x43;
 271                         else
 272                                 return (EILSEQ);
 273                         l = (linear / 94) + m;
 274                         t = (linear % 94) + 0x21;
 275                         *idx = (_index_t)((l << 8) | t);
 276                         *csid = 2;
 277                 }
 278         } else
 279                 return (EILSEQ);
 280         return (0);
 281 }
 282
 283 static __inline int
 284 /*ARGSUSED*/
 285 _citrus_JOHAB_stdenc_cstowc(_JOHABEncodingInfo * __restrict ei __unused,
 286     wchar_t * __restrict wc, _csid_t csid, _index_t idx)
 287 {
 288         int m, n, l, linear, t;
 289
 290         switch (csid) {
 291         case 0:
 292         case 1:
 293                 *wc = (wchar_t)idx;
 294                 break;
 295         case 2:
 296                 if (idx >= 0x2121 && idx <= 0x2C71) {
 297                         m = 0xD9;
 298                         n = 0x21;
 299                 } else if (idx >= 0x4A21 && idx <= 0x7D7E) {
 300                         m = 0xE0;
 301                         n = 0x4A;
 302                 } else
 303                         return (EILSEQ);
 304                 l = ((idx >> 8) & 0xFF) - n;
 305                 t = (idx & 0xFF) - 0x21;
 306                 linear = (l * 94) + t;
 307                 l = (linear / 188) + m;
 308                 t = linear % 188;
 309                 t += (t <= 0x4D) ? 0x31 : 0x43;
 310                 break;
 311         default:
 312                 return (EILSEQ);
 313         }
 314         return (0);
 315 }
 316
 317 static __inline int
 318 /*ARGSUSED*/
 319 _citrus_JOHAB_stdenc_get_state_desc_generic(_JOHABEncodingInfo * __restrict ei __unused,
 320     _JOHABState * __restrict psenc, int * __restrict rstate)
 321 {
 322
 323         *rstate = (psenc->chlen == 0) ? _STDENC_SDGEN_INITIAL :
 324             _STDENC_SDGEN_INCOMPLETE_CHAR;
 325         return (0);
 326 }
 327
 328 /* ----------------------------------------------------------------------
 329  * public interface for stdenc
 330  */
 331
 332 _CITRUS_STDENC_DECLS(JOHAB);
 333 _CITRUS_STDENC_DEF_OPS(JOHAB);
 334
 335 #include "citrus_stdenc_template.h"