1 /* $FreeBSD$ */ 2 /* $NetBSD: citrus_euctw.c,v 1.11 2008/06/14 16:01:07 tnozaki Exp $ */ 3 4 /*- 5 * SPDX-License-Identifier: BSD-2-Clause 6 * 7 * Copyright (c)2002 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 /*- 33 * Copyright (c)1999 Citrus Project, 34 * All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 45 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 46 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 47 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 48 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 49 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 50 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 51 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 52 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 53 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 54 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 55 * SUCH DAMAGE. 56 * 57 * $Citrus: xpg4dl/FreeBSD/lib/libc/locale/euctw.c,v 1.13 2001/06/21 01:51:44 yamt Exp $ 58 */ 59 60 #include <sys/cdefs.h> 61 #include <sys/types.h> 62 63 #include <assert.h> 64 #include <errno.h> 65 #include <limits.h> 66 #include <stddef.h> 67 #include <stdio.h> 68 #include <stdlib.h> 69 #include <string.h> 70 #include <wchar.h> 71 72 #include "citrus_namespace.h" 73 #include "citrus_types.h" 74 #include "citrus_module.h" 75 #include "citrus_stdenc.h" 76 #include "citrus_euctw.h" 77 78 79 /* ---------------------------------------------------------------------- 80 * private stuffs used by templates 81 */ 82 83 typedef struct { 84 int chlen; 85 char ch[4]; 86 } _EUCTWState; 87 88 typedef struct { 89 int dummy; 90 } _EUCTWEncodingInfo; 91 92 #define _SS2 0x008e 93 #define _SS3 0x008f 94 95 #define _CEI_TO_EI(_cei_) (&(_cei_)->ei) 96 #define _CEI_TO_STATE(_cei_, _func_) (_cei_)->states.s_##_func_ 97 98 #define _FUNCNAME(m) _citrus_EUCTW_##m 99 #define _ENCODING_INFO _EUCTWEncodingInfo 100 #define _ENCODING_STATE _EUCTWState 101 #define _ENCODING_MB_CUR_MAX(_ei_) 4 102 #define _ENCODING_IS_STATE_DEPENDENT 0 103 #define _STATE_NEEDS_EXPLICIT_INIT(_ps_) 0 104 105 static __inline int 106 _citrus_EUCTW_cs(unsigned int c) 107 { 108 109 c &= 0xff; 110 111 return ((c & 0x80) ? (c == _SS2 ? 2 : 1) : 0); 112 } 113 114 static __inline int 115 _citrus_EUCTW_count(int cs) 116 { 117 118 switch (cs) { 119 case 0: 120 /*FALLTHROUGH*/ 121 case 1: 122 /*FALLTHROUGH*/ 123 case 2: 124 return (1 << cs); 125 case 3: 126 abort(); 127 /*NOTREACHED*/ 128 } 129 return (0); 130 } 131 132 static __inline void 133 /*ARGSUSED*/ 134 _citrus_EUCTW_init_state(_EUCTWEncodingInfo * __restrict ei __unused, 135 _EUCTWState * __restrict s) 136 { 137 138 memset(s, 0, sizeof(*s)); 139 } 140 141 #if 0 142 static __inline void 143 /*ARGSUSED*/ 144 _citrus_EUCTW_pack_state(_EUCTWEncodingInfo * __restrict ei __unused, 145 void * __restrict pspriv, const _EUCTWState * __restrict s) 146 { 147 148 memcpy(pspriv, (const void *)s, sizeof(*s)); 149 } 150 151 static __inline void 152 /*ARGSUSED*/ 153 _citrus_EUCTW_unpack_state(_EUCTWEncodingInfo * __restrict ei __unused, 154 _EUCTWState * __restrict s, const void * __restrict pspriv) 155 { 156 157 memcpy((void *)s, pspriv, sizeof(*s)); 158 } 159 #endif 160 161 static int 162 /*ARGSUSED*/ 163 _citrus_EUCTW_encoding_module_init(_EUCTWEncodingInfo * __restrict ei, 164 const void * __restrict var __unused, size_t lenvar __unused) 165 { 166 167 memset((void *)ei, 0, sizeof(*ei)); 168 169 return (0); 170 } 171 172 static void 173 /*ARGSUSED*/ 174 _citrus_EUCTW_encoding_module_uninit(_EUCTWEncodingInfo *ei __unused) 175 { 176 177 } 178 179 static int 180 _citrus_EUCTW_mbrtowc_priv(_EUCTWEncodingInfo * __restrict ei, 181 wchar_t * __restrict pwc, char ** __restrict s, 182 size_t n, _EUCTWState * __restrict psenc, size_t * __restrict nresult) 183 { 184 char *s0; 185 wchar_t wchar; 186 int c, chlenbak, cs; 187 188 s0 = *s; 189 190 if (s0 == NULL) { 191 _citrus_EUCTW_init_state(ei, psenc); 192 *nresult = 0; /* state independent */ 193 return (0); 194 } 195 196 chlenbak = psenc->chlen; 197 198 /* make sure we have the first byte in the buffer */ 199 switch (psenc->chlen) { 200 case 0: 201 if (n < 1) 202 goto restart; 203 psenc->ch[0] = *s0++; 204 psenc->chlen = 1; 205 n--; 206 break; 207 case 1: 208 case 2: 209 break; 210 default: 211 /* illgeal state */ 212 goto ilseq; 213 } 214 215 c = _citrus_EUCTW_count(cs = _citrus_EUCTW_cs(psenc->ch[0] & 0xff)); 216 if (c == 0) 217 goto ilseq; 218 while (psenc->chlen < c) { 219 if (n < 1) 220 goto ilseq; 221 psenc->ch[psenc->chlen] = *s0++; 222 psenc->chlen++; 223 n--; 224 } 225 226 wchar = 0; 227 switch (cs) { 228 case 0: 229 if (psenc->ch[0] & 0x80) 230 goto ilseq; 231 wchar = psenc->ch[0] & 0xff; 232 break; 233 case 1: 234 if (!(psenc->ch[0] & 0x80) || !(psenc->ch[1] & 0x80)) 235 goto ilseq; 236 wchar = ((psenc->ch[0] & 0xff) << 8) | (psenc->ch[1] & 0xff); 237 wchar |= 'G' << 24; 238 break; 239 case 2: 240 if ((unsigned char)psenc->ch[1] < 0xa1 || 241 0xa7 < (unsigned char)psenc->ch[1]) 242 goto ilseq; 243 if (!(psenc->ch[2] & 0x80) || !(psenc->ch[3] & 0x80)) 244 goto ilseq; 245 wchar = ((psenc->ch[2] & 0xff) << 8) | (psenc->ch[3] & 0xff); 246 wchar |= ('G' + psenc->ch[1] - 0xa1) << 24; 247 break; 248 default: 249 goto ilseq; 250 } 251 252 *s = s0; 253 psenc->chlen = 0; 254 255 if (pwc) 256 *pwc = wchar; 257 *nresult = wchar ? c - chlenbak : 0; 258 return (0); 259 260 ilseq: 261 psenc->chlen = 0; 262 *nresult = (size_t)-1; 263 return (EILSEQ); 264 265 restart: 266 *s = s0; 267 *nresult = (size_t)-1; 268 return (0); 269 } 270 271 static int 272 _citrus_EUCTW_wcrtomb_priv(_EUCTWEncodingInfo * __restrict ei __unused, 273 char * __restrict s, size_t n, wchar_t wc, 274 _EUCTWState * __restrict psenc __unused, size_t * __restrict nresult) 275 { 276 wchar_t cs, v; 277 int clen, i, ret; 278 size_t len; 279 280 cs = wc & 0x7f000080; 281 clen = 1; 282 if (wc & 0x00007f00) 283 clen = 2; 284 if ((wc & 0x007f0000) && !(wc & 0x00800000)) 285 clen = 3; 286 287 if (clen == 1 && cs == 0x00000000) { 288 /* ASCII */ 289 len = 1; 290 if (n < len) { 291 ret = E2BIG; 292 goto err; 293 } 294 v = wc & 0x0000007f; 295 } else if (clen == 2 && cs == ('G' << 24)) { 296 /* CNS-11643-1 */ 297 len = 2; 298 if (n < len) { 299 ret = E2BIG; 300 goto err; 301 } 302 v = wc & 0x00007f7f; 303 v |= 0x00008080; 304 } else if (clen == 2 && 'H' <= (cs >> 24) && (cs >> 24) <= 'M') { 305 /* CNS-11643-[2-7] */ 306 len = 4; 307 if (n < len) { 308 ret = E2BIG; 309 goto err; 310 } 311 *s++ = _SS2; 312 *s++ = (cs >> 24) - 'H' + 0xa2; 313 v = wc & 0x00007f7f; 314 v |= 0x00008080; 315 } else { 316 ret = EILSEQ; 317 goto err; 318 } 319 320 i = clen; 321 while (i-- > 0) 322 *s++ = (v >> (i << 3)) & 0xff; 323 324 *nresult = len; 325 return (0); 326 327 err: 328 *nresult = (size_t)-1; 329 return (ret); 330 } 331 332 static __inline int 333 /*ARGSUSED*/ 334 _citrus_EUCTW_stdenc_wctocs(_EUCTWEncodingInfo * __restrict ei __unused, 335 _csid_t * __restrict csid, _index_t * __restrict idx, wchar_t wc) 336 { 337 338 *csid = (_csid_t)(wc >> 24) & 0xFF; 339 *idx = (_index_t)(wc & 0x7F7F); 340 341 return (0); 342 } 343 344 static __inline int 345 /*ARGSUSED*/ 346 _citrus_EUCTW_stdenc_cstowc(_EUCTWEncodingInfo * __restrict ei __unused, 347 wchar_t * __restrict wc, _csid_t csid, _index_t idx) 348 { 349 350 if (csid == 0) { 351 if ((idx & ~0x7F) != 0) 352 return (EINVAL); 353 *wc = (wchar_t)idx; 354 } else { 355 if (csid < 'G' || csid > 'M' || (idx & ~0x7F7F) != 0) 356 return (EINVAL); 357 *wc = (wchar_t)idx | ((wchar_t)csid << 24); 358 } 359 360 return (0); 361 } 362 363 static __inline int 364 /*ARGSUSED*/ 365 _citrus_EUCTW_stdenc_get_state_desc_generic(_EUCTWEncodingInfo * __restrict ei __unused, 366 _EUCTWState * __restrict psenc, int * __restrict rstate) 367 { 368 369 *rstate = (psenc->chlen == 0) ? _STDENC_SDGEN_INITIAL : 370 _STDENC_SDGEN_INCOMPLETE_CHAR; 371 return (0); 372 } 373 374 /* ---------------------------------------------------------------------- 375 * public interface for stdenc 376 */ 377 378 _CITRUS_STDENC_DECLS(EUCTW); 379 _CITRUS_STDENC_DEF_OPS(EUCTW); 380 381 #include "citrus_stdenc_template.h" 382